Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is provided with: a reception unit that receives settings for a channel state information (CSI) report for coherent joint transmission; and a control unit that determines, on the basis of the setting, the number of CSI processing units occupied in the calculation of the CSI report. According to one embodiment of the present disclosure, CSI for CJT can be appropriately reported.

Description

Technical Field

[0001] The present disclosure relates to a terminal, a wireless communication method, and a base station in a next-generation mobile communication system. Background Art

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized to achieve even higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) has been standardized to further enhance the capacity and sophistication of LTE (Release 8 and 9 of the Third Generation Partnership Project (3GPP (registered trademark))).

[0003] Successor systems to LTE (e.g., also referred to as 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later) are also under study.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-Patent Document 1: 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 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] In future wireless communication systems (e.g., NR), research is underway to report channel state information (CSI) based on received reference signals. Furthermore, research is underway to use multiple transmission / reception points (TRPs, Multi TRP (MTRP)) or multiple panels (multi-panel) for downlink transmission to terminals (user terminals, User Equipment (UE)). Furthermore, research is underway to utilize coherent joint transmission (CJT) using multiple TRPs / multi-panels.

[0009] However, CSI / codebooks for CJT have not yet been fully studied. If such a method is not clearly defined, there is a concern that communication throughput, communication quality, etc. may deteriorate.

[0010] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station for determining appropriate CSI / codebook for CJT.

[0011] Means for solving problems

[0012] A terminal according to one embodiment of the present disclosure includes: a receiving unit that receives a configuration of a channel state information (CSI) report for coherent joint transmission; and a control unit that determines the number of CSI processing units used in calculating the CSI report based on the configuration.

[0013] Effects of the Invention

[0014] According to one aspect of the present disclosure, CSI for CJT can be appropriately reported. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 An example of a 16-level quantization table is shown.

[0016] Figure 2 An example of an 8-level quantization table is shown.

[0017] Figure 3A as well as Figure 3B An example of an extended type 2 port selection codebook is shown.

[0018] Figure 4A as well as Figure 4B An example of an extended type 2 port selection codebook is shown.

[0019] Figure 5An example of parameter combinations for Rel.16 type 2 codebook is shown.

[0020] Figure 6 An example of a parameter combination for the Rel.17 type 2-port selection codebook is shown.

[0021] Figure 7 An example of the mapping order of the CSI fields of the CSI part 1 of one CSI report is shown.

[0022] Figure 8 An example of the mapping order of CSI fields in the CSI part 1 of one CSI report in CSI reporting mode (csi-ReportMode) = Mode2 is shown.

[0023] Figure 9 An example of the CSI report configuration (CSI-ReportConfig) is shown.

[0024] Figure 10 An example of the first part of the codebook configuration (CodebookConfig) of Rel. 15 is shown.

[0025] Figure 11 An example of the second part of the codebook configuration (CodebookConfig) of Rel. 15 is shown.

[0026] Figure 12 An example of codebook configuration (CodebookConfig-r16) of Rel.16 is shown.

[0027] Figure 13 An example of the first part of the codebook configuration (CodebookConfig-r17) of Rel.17 is shown.

[0028] Figure 14 An example of the second part of the codebook configuration (CodebookConfig-r17) of Rel.17 is shown.

[0029] Figure 15A as well as Figure 15B An example of the structure of a new codebook configuration (e.g., CodebookConfig-r18) for multi-TRP CSI is shown.

[0030] Figure 16A as well as Figure 16B Another example of the structure of a new codebook configuration (e.g., CodebookConfig-r18) for multi-TRP CSI is shown.

[0031] Figure 17A first example of a new mapping order of CSI fields in CSI part 1 of a CSI report according to embodiment #B2 is shown.

[0032] Figure 18 A second example of a new mapping order of CSI fields in CSI part 1 of one CSI report according to embodiment #B2 is shown.

[0033] Figure 19 A third example of a new mapping order of CSI fields in CSI part 1 of a CSI report according to embodiment #B2 is shown.

[0034] Figure 20 A fourth example of a new mapping order of CSI fields in CSI part 1 of a CSI report according to embodiment #B2 is shown.

[0035] Figure 21 A fifth example of a new mapping order of CSI fields in CSI part 1 of one CSI report according to embodiment #B2 is shown.

[0036] Figure 22 An example of a process for determining CPU occupancy is shown.

[0037] Figure 23 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0038] Figure 24 This is a diagram showing an example of the configuration of a base station according to one embodiment.

[0039] Figure 25 This is a diagram showing an example of the configuration of a user terminal according to an embodiment.

[0040] Figure 26 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment.

[0041] Figure 27 This is a diagram showing an example of a vehicle according to an embodiment. DETAILED DESCRIPTION

[0042] (CSI report or reporting)

[0043] 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 resources used for the RS), and transmits (also referred to as reporting, feeding back, etc.) the generated CSI to the network (e.g., a base station). This CSI may be transmitted to the base station using, for example, an uplink control channel (e.g., the physical uplink control channel (PUCCH)) or an uplink shared channel (e.g., the physical uplink shared channel (PUSCH)).

[0044] The RS used to generate CSI may be, for example, at least one of a Channel State Information Reference Signal (CSI-RS), a Synchronization Signal / Broadcast Channel (SS / PBCH) block, a Synchronization Signal (SS), and a demodulation reference signal (DeModulation Reference Signal (DMRS)).

[0045] The CSI-RS may also include non-zero power (NZP) CSI-RS and at least one of CSI-Interference Management (CSI-Interference Measurement, CSI-IM). An SS / PBCH block, also known as an SS block (SSB), includes the SS and PBCH (and the corresponding DMRS). Furthermore, the SS may also include at least one of the primary synchronization signal (PSS) and the secondary synchronization signal (SSS).

[0046] In addition, CSI may also include at least one of a channel quality indicator (Channel Quality Indicator (CQI)), a precoding matrix indicator (Precoding Matrix Indicator (PMI)), a CSI-RS resource indicator (CSI-RS Resource Indicator (CRI)), a SS / PBCH block resource indicator (SS / PBCH Block Resource Indicator (SSBRI)), a layer indicator (Layer Indicator (LI)), a rank indicator (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), L1-SNR (Signal to Noise Ratio), etc.

[0047] The UE may also receive information related to CSI reporting (report configuration information) and control CSI reporting based on this report configuration information. This report configuration information may be, for example, the "CSI-ReportConfig" information element (IE) of the Radio Resource Control (RRC) information element. Furthermore, in this disclosure, RRC IEs may interchangeably with RRC parameters and higher-layer parameters.

[0048] The report configuration information (eg, “CSI-ReportConfig” of RRC IE) may include at least one of the following.

[0049] Information related to the type of CSI report (report type information, for example, "reportConfigType" of RRC IE).

[0050] Information related to one or more quantities of CSI (one or more CSI parameters) to be reported (report quantity information, for example, "reportQuantity" in the RRC IE).

[0051] Information related to RS resources used to generate the quantity (the CSI parameter) (resource information, for example, "CSI-ResourceConfigId" in RRC IE).

[0052] Information related to the frequency domain to be reported by CSI (frequency domain information, for example, "reportFreqConfiguration" in RRC IE).

[0053] For example, the reporting type information may also indicate (indicate) periodic CSI (P-CSI) reporting, aperiodic CSI (A-CSI) reporting, or semi-persistent CSI (SP-CSI) reporting.

[0054] In addition, the reporting amount information may also specify a combination of at least one of the above-mentioned CSI parameters (eg, CRI, RI, PMI, CQI, LI, L1-RSRP, etc.).

[0055] Alternatively, the resource information may be an ID of an RS resource. The RS resource may include, for example, a non-zero-power CSI-RS resource or SSB, and a CSI-IM resource (eg, a zero-power CSI-RS resource).

[0056] In addition, frequency domain information can also indicate the frequency granularity of the CSI report. This frequency granularity can also include, for example, broadband and subband. Broadband refers to the entire CSI reporting band. Broadband can be, for example, the entirety of a certain carrier (component carrier (CC), cell, serving cell), or the entirety of the bandwidth part (BWP) within a certain carrier. Broadband can also be renamed as CSI reporting band, entire CSI reporting band, etc.

[0057] A subband is a portion of a wideband and can be composed of one or more resource blocks (RBs or PRBs). The size of a subband is also determined by the size of the BWP (number of PRBs).

[0058] Frequency domain information may also indicate whether wideband or subband PMI is to be reported (for example, the frequency domain information may also include the "pmi-FormatIndicator" RRC IE used to determine whether wideband PMI reporting or subband PMI reporting is to be used). The UE may also 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 aforementioned reporting amount information and the frequency domain information.

[0059] When wideband PMI reporting is configured (determined), a single wideband PMI may be reported for the entire CSI reporting band. On the other hand, when subband PMI reporting is configured, a single wideband indication i1 may be reported for the entire CSI reporting band, and subband indications i2 (e.g., subband indications for each subband) may be reported for one or more subbands within the entire CSI report.

[0060] The UE performs channel estimation using the received RS and estimates a channel matrix H. The UE feeds back a parameter index (PMI) determined based on the estimated channel matrix.

[0061] The PMI may also indicate the precoder matrix (also referred to as a precoder) that the UE considers suitable for downlink (DL) transmissions to the UE. Each PMI value may correspond to a precoder matrix. A set of PMI values may also correspond to a set of different precoder matrices, referred to as a precoder codebook (also referred to as a codebook).

[0062] In the spatial domain, a CSI report may include more than one type of CSI. For example, the CSI may include at least one of a first type (Type-1 CSI) for single-beam selection and a second type (Type-2 CSI) for multi-beam selection. Single-beam may be referred to as a single layer, and multi-beam may be referred to as multiple beams. Furthermore, Type-1 CSI may not assume multi-user multiple-input multiple-output (MU-MIMO), while Type-2 CSI may assume multi-user MIMO.

[0063] The codebooks described above 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, Type 1 CSI may include Type 1 single-panel CSI and Type 1 multi-panel CSI, and different codebooks (Type 1 single-panel codebook and Type 1 multi-panel codebook) may be defined for each.

[0064] In the present disclosure, type 1 and type I may be replaced with each other. In the present disclosure, type 2 and type II may be replaced with each other.

[0065] Uplink control information (UCI) types may also include at least one of the following: Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), Scheduling Request (SR), and CSI. UCI can be carried by both PUCCH and PUSCH.

[0066] In Rel.15 NR, UCI can include a CSI part for wideband PMI feedback. CSI report #n, when reported, includes PMI wideband information.

[0067] In Rel.15 NR, UCI can include two CSI parts for subband PMI feedback. CSI part 1 contains wideband PMI information. CSI part 2 contains one wideband PMI and several subband PMIs. CSI parts 1 and 2 are coded separately.

[0068] In Rel.15 NR, the UE is configured with N (N ≥ 1) CSI reporting configurations and M (M ≥ 1) CSI resource configurations by higher layers. For example, the CSI reporting configuration (CSI-ReportConfig) includes channel measurement resource configuration (resourcesForChannelMeasurement), interference CSI-IM resource configuration (csi-IM-ResourceForInterference), interference NZP-CSI-RS configuration (nzp-CSI-RS-ResourceForInterference), and report quantity (reportQuantity). Each of the channel measurement resource configuration, interference CSI-IM resource configuration, and interference NZP-CSI-RS configuration 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, such as an NZP-CSI-RS resource set or a CSI-IM resource set).

[0069] In order to realize the premise (hypotheses) of more dynamic channel / interference for NCJT, targeting both FR1 and FR2, the evaluation and regulation of CSI reports for transmission of multiple TRPs and at least one of multiple panels in DL are being studied.

[0070] (Codebook setting)

[0071] The UE is configured with codebook-related parameters (Codebook Configuration (CodebookConfig)) through higher-layer signaling (RRC signaling). The codebook configuration is included in the CSI report configuration (CSI-ReportConfig) of the higher-layer (RRC) parameters.

[0072] In the codebook setting, at least one codebook is selected from a plurality of codebooks including type 1 single panel (typeI-SinglePanel), type 1 multi-panel (typeI-MultiPanel), type 2 (typeII), and type 2 port selection (typeII-PortSelection).

[0073] Codebook parameters include parameters related to codebook subset restriction (CBSR) (…Restriction). CBSR settings are bits that indicate which PMI reports are permitted ("1") and which are not permitted ("0") for the precoder associated with the CBSR bit. Each bit in the CBSR bitmap corresponds to one codebook index / antenna port.

[0074] (CSI report settings)

[0075] The Rel.16 CSI reporting configuration (CSI-ReportConfig) includes not only the codebook configuration (CodebookConfig), but also 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)), and other parameters. CSI-ReportConfig parameters other than codebookConfig-r16 are also included in the Rel.15 CSI reporting configuration.

[0076] In Rel. 17, an extended (enhanced) CSI reporting configuration (CSI-ReportConfig) for CSI measurement / reporting of multiple TRPs using NCJT is under study. In this CSI reporting configuration, two CMR groups corresponding to each of the two TRPs are configured. The CMRs within a CMR group can also be used for measurements of at least one of multiple TRPs and a single TRP using NCJT. The N CMR pairs of NCJT are configured via RRC signaling. The UE can also be configured via RRC signaling to determine whether to use the CMRs of the CMR pair for single TRP measurements.

[0077] For CSI reports associated with NCJT measurements of multiple TRPs / panels configured through a single CSI report configuration, support for at least one of the following options 1 and 2 is under study.

[0078] <Option 1>

[0079] The UE is configured to report X (X = 0, 1, 2) CSIs associated with the single TRP measurement assumption and one CSI associated with the NCJT measurement. In the case of X = 2, the two CSIs are associated with two different single TRP measurements using CMRs from different CMR groups.

[0080] Option 2

[0081] The UE may also be configured to report a CSI associated with the best measurement result for NCJT and single TRP measurement assumptions.

[0082] As described above, in Rel. 15 / 16, the CBSR is configured for each codebook configuration in each CSI reporting configuration. That is, the CBSR is applied to all CMRs, etc. within the corresponding CSI reporting configuration.

[0083] However, in the CSI reporting configuration for multiple TRPs based on Rel.17 of the CSI reporting configuration, when the above-mentioned options 1 and 2 are applied, it is possible to perform the following measurement configuration.

[0084] Option 1 (X=0): Only NCJT CSI measurement.

[0085] Option 1 (X=1): Measurement of the CSI of the NCJT and the CSI of a single TRP (one TRP).

[0086] Option 1 (X=2): Measurement of the CSI of the NCJT and the CSI of a single TRP (two TRPs).

[0087] Option 2: Measurement of both NCJT CSI and single TRP CSI.

[0088] (Type 1 codebook)

[0089] As the Type 1 codebook (Rel.15), the Type 1 single-panel codebook and the Type 1 multi-panel codebook are specified for the base station panel. In the Type 1 single-panel, the antenna pattern 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, for the number of CSI-RS antenna ports P CSI-RS and (N g ,N1,N2), specifies the antenna model of the CSI antenna port array (logical setting).

[0090] For Rel.15 type 1 single panel CSI, the UE is configured with the higher-level parameters of the codebook type (subType in type1 in codebookType in CodebookConfig) for type 1 single panel ('typeI-SinglePanel'). In the case where the number of layers v∈{2,3,4} is not the same as the number of layers v∈{2,3,4}, the PMI value is related to the three codebook indices i 1,1 ,i 1,2 ,i2 corresponds to. In the case of layer number v∈{2,3,4}, the PMI value is related to the 4 codebook indexes i 1,1 ,i 1,2 ,i 1,3 , i2 corresponds. In the case where the number of layers v∈{2,3,4} is not the same, the composite codebook index i1=[i 1,1 i 1,2 In the case of the number of layers v∈{2,3,4}, the composite codebook index i1=[i 1,1 i 1,2 i 1,3 i1 can also be an index for a wideband. i2=n can also be an index for a subband / phase.

[0091] For P CSI-RS The specification specifies the supported (N1, N2) and (O1, O2) settings (value combinations). (N1, N2) represents the number of two-dimensional (2D) antenna elements and is set via the higher-level parameters n1-n2 in the moreThanTwo parameter in the nrOfAntennaPorts field of typeI-SinglePanel. n1-n2 are bitmap parameters with the N1O1N2O2 bit positions. (O1, O2) represents the 2D oversampling factor.

[0092] In the codebook for 1-layer CSI reporting and codebook mode (codebookMode) = 1, the index i corresponding to the horizontal beam 1,1 =l=0,1,...,N1O1-1, index i corresponding to the vertical beam 1,2 =m=0,1,...,N2O2-1, i2=n=0,1,2,3, using antenna ports 3000 to 2999+P CSI-RS The matrix used in the 1-layer CSI report codebook is W_i 1,1 ,i 1,2 ,i2^(1). Here, W l,m,n （1） It is given by the following formula.

[0093]

[0094] Here, vl,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 phase matching (co-phasing) between polarizations (horizontal polarization and vertical polarization) φ n =exp(jπn / 2), which represents the phase of one polarization relative to the phase of the other polarization.

[0095] Compared with the Type 1 single panel, for Rel.15 Type 1 multi-panel CSI, in addition to N1 and N2, the number of panels N is also set. g As inter-panel co-phasing, phase compensation between panels, additional report i, 1,4 . Select the same SD beam for each panel (precoding matrix W l ), only inter-panel phase matching is reported additionally.

[0096] For P CSI-RS , the specification specifies the supported (N g ,N1,N2) and (O1,O2) settings (value combination). (N1,N2) are set by ng-n1-n2 in typeI-MultiPanel. 1,1 is {0,1,...,N1O1-1}. 1,2 is {0,1,...,N2O2-1}. For q=1,...,N g -1,i 1,4,q = {0,1,2,3}. i2 = {0,1,2,3}. For codebook mode (codebookMode) = 1, use antenna ports 3000 to 2999+P CSI-RS The matrix used in the 1-layer CSI report codebook is W_i 1,1 ,i 1,2 ,i 1,4 ,i2^(1). Here, W l,m,p,n （1） =W l,m,p,n ^1,N g ,1.

[0097] For N g ={2,4}W_l,m,p,n^1,N g ,1 and W_l,m,p,n^2,N g ,1 (for the first layer, N g=2, codeBookMode=1 matrix W l,m,p,n 1,2,1 ; For the second layer, N g =2, codeBookMode=1 matrix W l,m,p,n 2,2,1 ; For the first layer, N g =4, codeBookMode=1 matrix W l,m,p,n 1,4,1 ; and for the second layer, N g =4, codeBookMode=1 matrix W l,m,p,n 2,4,1 ) is given by the following formula.

[0098]

[0099] Here, φ n =e jπn / 2 For N g =2, p=p1, for N g =4, p=[p1,p2,p3]. φ_p1, φ_p2, φ_p3 represent the phase matching between panels. For panels 0, 1, 2, 3, select the same beam (SD beam matrix, precoding matrix W l ), 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.

[0100] (Type 2 codebook)

[0101] In this disclosure, a matrix Z with X rows and Y columns is sometimes represented as Z(X×Y)

[0102] For Rel.15 type 2 CSI, for a given layer l, the generation of the precoding vector per subband (SB-wise) is based on the following equation.

[0103]

[0104] N t is the number of antennas / antenna ports. N3 is the total number (number of subbands) of precoding (beamforming) matrices (precoders) indicated by PMI. W1(N t ×2L) is a matrix (SD beam matrix) composed of L∈{2,4} (oversampled) spatial domain (SD) 2D DFT vectors (SD beams, 2D-DFT vectors). L is the number of beams. Considering horizontal polarization and vertical polarization at one location, the actual number of beams is 2L. For example, L=2 SD 2D-DFT vectors are bi ,b j .W 2,l (2L×N3) is a matrix (LC coefficient matrix) consisting of linear combination coefficients (linear combination (LC) coefficients, subband complex LC coefficients, and combination coefficients) for layer l. 2,l Indicates beam selection and phase matching (co-phasing) between two polarizations. For example, two W 2,l c i ,c j For example, the channel vector h is obtained by linearly combining L=2 SD 2D-DFT vectors c i b i ,+c j b j The feedback overhead is mainly composed of the LC coefficient matrix W 2,l In addition, the type 2 CSI of Rel.15 only supports ranks 1 and 2.

[0105] 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). Rel.15 Type 2 CSI supports ranks 1 and 2.

[0106] (Extension of Type 2 codebook)

[0107] Rel.16 Type 2 CSI (enhanced Type 2 codebook) reduces the W 2,l The associated overhead. Rel.16 Type 2 CSI supports not only ranks 1 and 2, but also ranks 3 and 4.

[0108] In Rel.16 type 2 CSI, for a given layer 1, the UE reports information based on the following formula.

[0109]

[0110] W 2,l By W ~ l W f,l H And approximate. Matrix W ~ It can also be expressed by adding ~ (wavy line) to W. ~ l It can also be expressed as W ~ 2,l Matrix W f,l H It's Wf,l The adjoint matrix of f,l The conjugate transpose of is obtained.

[0111] For CSI reporting, the UE can also be configured with one subband size within the two subband sizes. This subband (CQI subband) can also be defined as N PRB SB The number of PMI subbands per CQI subband, R, is set via the RRC IE (numberOfPMI-SubbandsPerCQI-Subband). R controls the total number of precoding matrices, N3, represented by the PMI as a function of the number of subbands specified in the CSI-ReportingBand field, the subband size specified by subbandSize, and the total number of PRBs in the BWP.

[0112] W1 (N t ×2L) is a matrix composed of multiple (oversampled) spatial domain (SD) 2D-DFT vectors (beams). This matrix reports multiple indices of the two-dimensional discrete Fourier transform (2D-DFT) vectors and the two-dimensional oversampling factor. The spatial domain response / distribution represented by the SD 2D-DFT vectors is also called an SD beam.

[0113] W ~ l (2L×M v ) is a matrix of LC coefficients. For this matrix, at most K0 non-zero coefficients (non-zero coefficients (NZCs) are reported. The report consists of two parts: a bitmap that captures the NZC positions and a quantized NZC.

[0114] W f,l (N3×M v ) is a matrix consisting of multiple frequency domain (FD) bases (vectors) for layer 1. N3 is the total number of precoding (beamforming) matrices (precoders) (number of subbands) indicated by PMI as a function of the number of subbands set in the csi-ReportingBand. The csi-ReportingBand indicates the continuous or discontinuous subbands within a BWP when CSI for that BWP is reported. Each layer has M van FD basis (FD DFT basis). When N3 > 19, select M from the intermediate subset (InS) of size N3' (< N3). v an FD basis. When N3 ≤ 19, report log2(C(N3 - 1, M v - 1)) bits. Here, C(N3 - 1, M v - 1) represents the number of combinations of selecting M v - 1 from N3 - 1 (combinatorial coefficient C(x, y)), also known as binomial coefficients.

[0115] The response / distribution in the frequency domain (frequency response) represented by the linear combination of FD basis vectors and LC coefficients can also be called an FD beam. The FD beam can also correspond to the delay distribution (time response).

[0116] The PMI sub - band size is given by CQI sub - band size / R, where R ∈ {1, 2}. The number M of FD bases for a given rank v v is given by 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 the higher layer.

[0117] For the FD basis (DFT) associated with the precoding matrix (sub - band) indices t = 0, 1,..., N3 - 1 and layer l = 1,..., v, it is y t,l （f） = exp(j2πtn 3,l （f） / N3). Among the M v FD basis vectors, for the FD basis vectors associated with the indices f = 0, 1,..., M v - 1, the FD basis vectors are [y 0,l （f） , y 1,l （f） ,..., y N_3-1,l （f） T . The M v FD basis vectors are determined by 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} is identified.

[0118] Matrix W 2,l Each row of represents the channel frequency response of a specific SD beam. When the SD beam has high directivity, the channel tap of each beam is limited (the power delay distribution in the time domain becomes sparse). As a result, the channel frequency response of each SD beam has high correlation (close to 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, in M v = 2, using the FD basis f2, f q and LC coefficient d1 0 ,d2 0 , the frequency response associated with SD beam b0 is through d1 0 f2+,d2 0 f q To approximate.

[0119] Select the dominant M v FD basis. By setting M v ≪N3, W ~ l The cost is W 2,l The overhead is much smaller. v All or part of the FD basis is used to approximate the frequency response of each SD beam. A bitmap is used to report only the FD basis selected for each SD beam. If the bitmap is not reported, all FD basis are selected for each SD beam. In this case, the NZC of all FD basis is reported for each SD beam. The number of NZCs in one layer K l NZ ≤K0=ceil(β×2LM v ), the NZC number K across all layers NZ ≤2K0=ceil(β×2LM v ). β is set by the upper layer.

[0120] In 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).

[0121] Rel. 16 Type 2 CSI feedback on the PUSCH consists of 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 (the UCI size depends on the number of NZCs, which is unknown to the base station). The UE reports the number of NZCs in CSI Part 1, which determines the size of CSI Part 2. After receiving CSI Part 1, the base station identifies the size of CSI Part 2.

[0122] In enhanced Type 2 CSI feedback, CSI Part 1 contains (if reported) RI, CQI, and an indicator of the total number of non-zero amplitude coefficients across multiple layers for the extended Type 2 CSI. RI, CQI, and an indicator of the total number of non-zero amplitude coefficients across multiple layers are coded separately as fields of Part 1. CSI Part 2 contains the PMI for the extended Type 2 CSI. Parts 1 and 2 are coded separately. CSI Part 2 (PMI) contains at least one of the following: oversampling factor, index of the 2D-DFT basis, index M of the initial DFT basis (starting offset) of the selected DFT window. initial , the DFT basis chosen for each layer, the NZC (amplitude and phase) of each layer, the strongest coefficient indicator (SCI) of each layer, and the amplitude of the strongest coefficient for each layer / polarization.

[0123] Multiple PMI indices (PMI values, codebook indices) associated with different CSI part 2 information may also follow for the lth layer as follows.

[0124] i 1,1 : 2D oversampling factor [q1 q2]. q1∈{0,1,...,O1-1},q2∈{0,1,...,O2-1}.

[0125] i 1,2 : Multiple indices of the (SD) 2D-DFT basis (beam). i 1,2 ∈{0,1,...,C(N1N2,L)-1}.

[0126] i 1,5 : Codebook indicator. Index of the (FD)DFT basis of the selected DFT window. i 1,5 ∈{0,1,...,2M v -1}.

[0127] i 1,6,l : Codebook indicator. (FD) DFT basis selected for the lth layer. In the case of N3≤19, i 1,6,l ∈{0,1,...,C(N3-1,M v -1)-1}. In the case of N3>19, i 1,6,l ∈{0,1,...,C(2M v -1,M v -1)-1}.

[0128] i 1,7,l : Bitmap indicator for the lth layer. The non-zero bits in this bitmap are used to identify i 2,4,l and i 2,5,l Which coefficients are reported within i 1,7,l =[k l,0 （3） ... k l,M_v-1 （3） ], k l,f （3） =[k l,0,f （3） ... k l,M_v-1,f （3） ], k l,i,f （3） ∈{0,1}.

[0129] 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） ).

[0130] i 2,3,l : Amplitude coefficient indicator of the coefficient (broadband) of the lth layer (both polarizations). i 2,3,l =[k l,0 （1） k l,1 （1） ].

[0131] 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） ].

[0132] i 2,5,l: Phase coefficient indicator of the reported coefficients (sub-bands) of the l-th layer. i 2,5,l = [c l,0,f ... c l,M_v-1,f .

[0133] Let f l * ∈ {0, 1,..., M v - 1} be the index of i 2,4,l and let i l * ∈ {0, 1,..., 2L - 1} be the index of k l,f_l^* （2） This f l * and i l * identify the strongest coefficients for layers l = 1,..., v, that is, the element k 2,4,l of i l,i_l^*,f_l^* （2） . The codebook index n 3,l with respect to n 3,l （f_l^*） is remapped to n 3,l （f） = (n 3,l （f） - n 3,l （f_l^*） ) mod N3 and becomes n 3,l （f_l^*） = 0 after remapping. The index f with respect to f l * is remapped to f = (f - f l * ) mod M v and becomes f l * = 0 (l = 1,..., v). i 2,4,l , i 2,5,l , and i 1,7,l represent the amplitude coefficient, phase coefficient, and bitmap after remapping respectively. The strongest coefficient of layer l identified by i 1,8,l ∈ {0, 1,..., 2L - 1} is given as i 1,8,l = Σ i=0 i_1^* k l,i,0 （3） - 1 for v = 1 and is given as i 1,8,l = i l * for 1 < v ≤ 4.

[0134] W ~ lThe reported LC coefficients (complex coefficients) are separately quantized in amplitude and phase.

[0135] [Amplitude Quantization]

[0136] The polarization specific reference amplitude is used Figure 1 Table (Amplitude coefficient indicator i 2,3,l Mapping of elements within: From the amplitude coefficient indicator element k l,p （1） Amplitude coefficient p l,p （1） Through this table, p l （1） =[p l,0 （1） p l,1 （1） ] is quantized as [k l,0 （1） k l,1 （1） ], k l,p （1） ∈{0,...,15}. All other coefficients are calculated using Figure 2 Table (Amplitude coefficient indicator i 2,4,l Mapping of elements within: From the amplitude coefficient indicator element k l,i,f （2） Amplitude coefficient p l,i,f （2） Through this table, 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 quantized to k l,f （2） =[k l,0,f （2） ... k l,2L-1.f （2） ]、k l,i,f （2） ∈{0,...,7}.

[0137] [Phase Quantization]

[0138] Amplitude factor indicator i 2,5,l Elements within (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 used for phase matching φ l,i,f = exp(j2πc l,i,f / 16) is quantized to c l,f =[c l,0,f ... c l,2L-1.f ], c l,i,fi ∈{0,...,15}.

[0139] Amplitude coefficient indicator element k corresponding to the strongest coefficient of layer l l,floor（i_l^* / L） （1） =15 (maximum), the amplitude factor indicator element k l,i_l^*,0 （2） =7 (maximum), 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） 、c l,i_l^*,0 （2） =0 is not reported.

[0140] i 1,5 and i 1,6,l Is the PMI index used for (FD)DFT basis reporting. Only when N3>19, i 1,5 was reported.

[0141] By using from 3000 to 2999+P CSI-RS The codebook matrix W for the v (=1 to 4) layer CSI report is represented by （v） Based on the following matrix W for layer l (=1 to v) l .

[0142]

[0143] Here, 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） represents the SD(beam)-DFT basis, p l,0 （1） 、p l,i,f （2） represents the amplitude coefficient, φ l,i,fIn this way, the codebook for each layer contains the strongest coefficient for each polarization, the amplitude coefficient for each FD-DFT basis and each SD-DFT basis for each polarization, and the phase coefficient for each FD-DFT basis and each SD-DFT basis for each polarization.

[0144] As a grouping of CSI part 2, for a given CSI report, the PMI information is aggregated into 3 groups (groups 0 to 2). This is important in case of CSI omission. Index i 2,4,l 、i 2,5,l 、i 1,7,l Each element reported is associated with a specific precedence rule. Groups 0 to 2 follow the following.

[0145] Group 0: index i 1,1 、i 1,2 、i 1,8,l (l=1,...,v).

[0146] Group 1: Index i (when reported) 1,5 , index i (when reported) 1,6,l 、i 1,7,l The highest (highest) v2LM within v -floor(K NZ / 2) priority elements, i 2,3,l 、i 2,4,l The highest (high) ceil (K NZ / 2)-v priority elements, i 2,5,l The highest (high) ceil (K NZ / 2)-v priority elements (l=1,...,v).

[0147] 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).

[0148] In Type 1 CSI, an SD beam represented by an SD DFT vector is transmitted to the UE. In Type 2 CSI, L SD beams are linearly combined and transmitted to the UE. Each SD beam can be associated with multiple FD beams. For each SD beam, the linear combination of these FD basis vectors yields a channel frequency response. This channel frequency response corresponds to a power delay profile.

[0149] (Type 2 port selection codebook / extension / additional extension)

[0150] In Rel.15 Type-2 Port Selection (PS) CSI (Type-2 PS codebook), the UE does not need to consider the 2D-DFT to derive SD beams, as is required for Type-2 CSI. The base station considers a set of SD beams and transmits CSI-RS using K beamformed CSI-RS ports. The UE selects / identifies the best L (≤K) CSI-RS ports for each polarization and reports their indices within W1. Rel.15 Type-2 PS CSI supports ranks 1 and 2.

[0151] The operation of Rel.16 Type-2 PS CSI (enhanced Type-2 PS codebook) is the same as Rel.16 Type-2 CSI except for the selection of SD beam. Rel.15 Type-2 PS CSI supports ranks 1 to 4.

[0152] For layer l∈{1,2,3,4}, the subband (SB)-wise precoder generation is given by the following equation.

[0153]

[0154] Here, Q(N t ×K) represents the K SD beams used for CSI-RS beamforming. W1 (K×2L) is a block diagonal matrix. ~ 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}. In P CSI-RS When >4, L∈{2,3,4}.

[0155] In Rel.15 / 16 type 2 PS CSI, each CSI-RS port #i is associated with the SD beam (b i ) association ( Figure 3A as well as Figure 3B ).

[0156] Rel.16 Type 2 PS CSI is similar to Rel.16 Type 2 CSI by reducing the number of FD bases from N3 to M v (M v ≪N3), which reduces overhead compared to the Type 2 PS CSI of Rel.15.

[0157] In the CSI / codebook (additional extension, further extension (furtherenhanced)) of type 2 port selection in Rel. 17, for each CSI-RS port #i, instead of the SD beam, it is paired with the SD-FD beam (SD beam b i and FD beam f i,j (j is the frequency index)) to associate ( Figure 4A as well as Figure 4B In this example, ports 3 and 4 are associated with the same SD beam and different FD beams.

[0158] The frequency selectivity of the channel frequency response observed in the UE based on the SD beam-FD beam can be reduced by pre-compensation of delay (delay pre-compensation) compared to the frequency selectivity of the channel frequency response observed in the UE based on the SD beam.

[0159] The primary scenario for the Type 2 port selection codebook in Rel. 17 is FDD. Channel reciprocity based on SRS measurements is imperfect (the UL and DL beam angles may differ, and in FDD, the UL and DL frequencies differ, resulting in different effective antenna spacings for the UL and DL frequencies). However, the base station can obtain / select some information (the governing angles and delays (SD and FD beams)). By using SRS measurements in the base station in addition to CSI reporting, the base station can obtain CSI for DL MIMO precoder decisions. In this case, some CSI reports can be omitted to reduce CSI overhead.

[0160] In the Rel.17 (further enhanced) type 2 port selection codebook, the values of α, M, and β (parameter combination) are determined by the higher-layer parameter paramCombination-r17 (codebook parameter setting). Figure 5 An example of parameter combinations for Rel.16 type 2 codebook is shown. Figure 6 An example of parameter combinations for Rel.17 type 2 port selection codebook is shown. The precoding matrix represented by PMI is determined based on L+M vectors. Here, L=K1 / 2, K1=αP CSI-RS .

[0161] In Rel. 17 Type 2 PS CSI, each CSI-RS port is beamformed using an SD beam and an FD basis vector, and each port is associated with an SD-FD pair.

[0162] For a given layer 1, the UE may also report information based on the following formula.

[0163]

[0164] For W1 (K×2L), each matrix block consists of L columns of a K×K identity matrix. The base station sends K beamformed CSI-RS ports. Each port is associated with an SD-FD pair. The UE selects L ports out of K and uses them as the PMI (W 1,l ) is reported to the base station. In addition, in Rel.16, each port is associated with an SD beam.

[0165] W ~ l (2L×M v ) is a matrix consisting of combined coefficients (subband complex LC coefficients). A maximum of 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. In Rel. 16, the NZC position bitmap is always reported.

[0166] W f,l (N3×M v ) is a matrix consisting of N3 FD basis (FD-DFT basis) vectors. Each layer has M v The base station can also delete W f,l In W f,l When it is on, M v An additional FD basis is reported. f,l If it is off, the added FD base will not be reported. f,l Always reported.

[0167] (CSI feedback on PUSCH)

[0168] In Type 1, Type 2, Extended Type 2, and Additional Extended Type 2 Port Select CSI feedback on the PUSCH, the CSI report consists of two parts. Part 1 has a fixed payload size and is used to identify the number of information bits in Part 2. Part 1 is transmitted earlier than Part 2.

[0169] In Extended Type 2 CSI feedback and Additional Extended Type 2 Port Select CSI feedback, Part 1 contains (if reported) RI, CQI, and an indication of the total number of non-zero amplitude coefficients across multiple layers. The RI, CQI, and indication of the total number of non-zero amplitude coefficients across multiple layers, as fields of Part 1 (if reported), are coded separately. Part 2 contains the PMI for Extended Type 2 or Additional Extended Type 2 Port Select CSI. Parts 1 and 2 are coded separately.

[0170] Figure 7 An example of the mapping order of CSI fields in CSI Part 1 of a CSI report is shown. The mapping order for CSI Part 1 of this single TRP is applied to both Type 1 and Type 2 CSI.

[0171] Figure 8 This figure shows an example of the mapping order of CSI fields in CSI Part 1 of a CSI report with CSI reporting mode (csi-ReportMode) = Mode 2. This specifies the mapping order for CSI Part 1 of Rel.17 NCJT CSI with different reporting modes.

[0172] A plurality of subbands for a CSI part #n indicated and given by a higher-layer parameter csi-ReportingBand includes the lowest subband of the csi-ReportingBand as subband 0 and are numbered consecutively in ascending order.

[0173] (JT)

[0174] Joint transmission (JT) may also mean simultaneous data transmission from multiple points (eg, TRPs) to a single UE.

[0175] Rel.17 supports non-coherent joint transmission (NCJT) from two TRPs. The PDSCHs from the two TRPs can also be independently precoded and decoded. Frequency resources can be non-overlapping, partially overlapping, or fully overlapping. In the event of overlap, the PDSCH from one TRP interferes with the PDSCH from the other TRP.

[0176] In Rel. 18, support for coherent joint transmission (CJT) using up to four TRPs is under study. Data from the four TRPs can be coherently precoded and sent to the UE on the same time-frequency resources. For example, the same precoding matrix can be used to consider the channels from the four TRPs. Coherence can also mean that there is a certain relationship between the phases of the multiple received signals. Joint precoding of the four TRPs can also be used to improve signal quality, and there can be no interference between the four TRPs. Data can also be subject to interference only from outside the four TRPs.

[0177] (Rel.17 NCJT CSI)

[0178] In Rel. 17, NCJT CSI reporting can be applied in single-DCI MTRP NCJT with a Type 1 single-panel codebook. For NCJT CSI measurements, two channel measurement resource (CMR) groups can be configured within a single CSI-ReportConfig, along with their respective CMRs from a TRP. A CSI reporting mode can be selected from two modes.

[0179] CSI-ReportConfig for Rel.17 non-coherent joint transmission (NCJT) CSI sets the CMR and CSI reporting mode (csi-ReportMode) through RRC signaling.

[0180] Accompanied by K s = Two CMR groups of K1+K2 CMRs are set for the UE. 2≤K s ≤8.K sCMRs correspond to the NZP-CSI-RS resource set for channel measurement. K1 and K2 are the number of CMRs in the two CMR groups. N (N groups) of CMR pairs are set by the higher layer by selecting from all possible pairs. Support N=1, K s =2. N max =2 support is an optional function of UE. S,max =X support is an optional feature of the UE. Each CMR can contain up to 32 CSI-RS ports depending on the UE capabilities. Each CMR is associated with a CRI value.

[0181] The RRC signaling-based bitmap represents the N (N=1, 2) CMR pairs actually used for NCJT measurement by indicating one CMR from each CMR group. The UE uses CMRs from both CMR groups to measure a single TRP CSI for TRP1 and a single TRP CSI for TRP2, using N CMR pairs to measure NCJT CSI.

[0182] The UE selects one or more CSIs to be reported based on the mode configured in csi-ReportMode. csi-ReportMode indicates one of the following two modes: Mode 1 and Mode 2.

[0183] Supports at least one of the following modes 1 and 2.

[0184] [Mode 1]

[0185] The UE can also be configured to report X CSIs associated with a single TRP measurement hypothesis and one CSI associated with an NCJT measurement hypothesis. X = 0, 1, or 2. When X = 2, the two CSIs are associated with two different single TRP measurement hypotheses with multiple CMRs from different multiple CMR groups. Support for X = 1 or 2 is an optional feature for UEs supporting Option 1.

[0186] [Mode 2]

[0187] The UE is configured to report a CSI associated with the best one within the measurement conditions of NCJT and single TRP.

[0188] In Mode 1, the UE reports a total of X+1 CSIs, which include X (X=0, 1, 2) single-TRP CSIs and 1 NCJT CSI. In Mode 2, the UE reports the best CSI (one CSI) from all single-TRP CSIs and one NCJT CSI.

[0189] In a single CSI report, up to two single-TRP CSIs and one NCJT CSI (with mode 1 of X=2) can be reported. NCJT CSI includes one CRI, two RIs (with a joint RI index), two PMIs, two LIs, and one CQI (under 4 layers). Single-TRP CSI is the same as existing CSI, including one CRI, one RI / PMI / LI, and one or two CQIs (under 8 layers, one CQI per CW).

[0190] For the following scenarios, a new mapping order (table) of multiple fields in a CSI report is defined.

[0191] Mapping order for wideband CSI in mode 1 with X=0. Wideband CSI is supported only for mode 1 with X=0, i.e., NCJT CSI.

[0192] Mapping order of CSI part 1 for modes 1 and 2.

[0193] Mapping order of CSI part 2 wideband for modes 1 and 2.

[0194] Mapping order of CSI part 2 subbands for modes 1 and 2.

[0195] (CSI report settings / codebook settings)

[0196] Figure 9 This figure shows an example of a CSI report configuration (CSI-ReportConfig). The higher-layer parameter (RRC IE) CSI-ReportConfig can include codebook configuration (CodebookConfig / CodebookConfig-r16 / CodebookConfig-r17), CSI-RS resources for channel measurement (resourcesForChannelMeasurement (CMR)), and CSI-RS resources for interference measurement (csi-IM-ResourcesForInterference (ZP-IMR) and nzp-CSI-RS-ResourcesForInterference (NZP-IMR)).

[0197] The structure of the RRC IE in this disclosure is described using Abstract Syntax Notation One (ASN.1) notation. The structure of the RRC IE in this disclosure is an example and may be partially omitted. The structure of the RRC IE may include other descriptions or descriptions specified in existing RRC protocol specifications. In this disclosure, RRC information elements / parameters with the same names as RRC IEs specified in existing RRC protocol specifications may have the same meaning.

[0198] Figure 10 as well as Figure 11 This section shows an example of a codebook configuration (CodebookConfig) for Rel. 15. CodebookConfig includes either Type 1 or Type 2 codebook types. Type 1 codebook types include subtypes of Type 1 Single Panel (typeI-SinglePanel) and Type 1 MultiPanel (typeI-MultiPanel). Type 2 codebook types include subtypes of Type 2 (typeII) and Type 2 Port Selection (typeII-PortSelection).

[0199] Figure 12 An example of codebook configuration (CodebookConfig-r16) for Rel. 16 is shown. CodebookConfig-r16 includes a codebook type of type 2. The codebook type of type 2 includes subtypes of either extended type 2 (typeII-r16) or extended type 2 port selection (typeII-PortSelection-r16).

[0200] Figure 13 as well as Figure 14An example of the codebook configuration for Rel. 17 (CodebookConfig-r17) is shown. CodebookConfig-r17 includes either Type 1 or Type 2 codebook types. Type 1 codebook types can include at least one of the following: extended Type 1 Single Panel Group 1 (typeI-SinglePanel-Group1-r17), extended Type 1 Single Panel Group 2 (typeI-SinglePanel-Group2-r17), extended Type 1 Single Panel RI Restriction Single TRP (typeI-SinglePanel-ri-RestrictionSTRP-r17), and extended Type 1 Single Panel RI Restriction SDM (typeI-SinglePanel-ri-RestrictionSDM-r17). Type 2 codebook types include the addition of extended Type 2 Port Selection (typeII-PortSelection-r17). typeI-SinglePanel-Group1-r1 and typeI-SinglePanel-Group2-r17 set the following codebooks: Codebooks for CSI calculation when two CMR groups are set with CMRGroupingAndPairing in the NZP-CSI-RS-ResourceSet associated with the CSI-ReportConfig. The network sets the same number of ports for these two codebooks. typeI-SinglePanel-ri-RestrictionSTRP-r17 and typeI-SinglePanel-ri-RestrictionSDM-r17 are restrictions: Restrictions for RI for N resource pairs when two CMR groups are set with CMRGroupingAndPairing in the NZP-CSI-RS-ResourceSet associated with the CSI-ReportConfig.

[0201] Codebook settings (CodebookConfig / CodebookConfig-r16 / CodebookConfig-r17) can include parameters related to codebook subset restrictions (CBSR) (e.g., ...-TypeI-SinglePanel-Restriction, ...-TypeI-MultiPanel-Restriction, n1-n2-codebookSubsetRestriction, n1-n2-codebookSubsetRestriction-r16, ...-TypeI-SinglePanel-Restriction1-r17, ...-TypeI-SinglePanel-Restriction2-r17). Each bit in the CBSR bitmap indicates whether PMI reporting for the associated precoder is permitted ("1") or not permitted ("0"). Each bit in the CBSR bitmap corresponds to a codebook index for the codebook for x transmissions (x-Tx, 2-layer transmission).

[0202] (CSI restrictions)

[0203] Within the CSI report configuration (CSI-ReportConfig), a codebook configuration (CodebookConfig) with two RI restriction parameters (RIrestriction parameters) can be configured. When a CRI corresponding to one entry within M CSI-RS resources is required, one parameter is used for the reported RI. When a CRI corresponding to one entry within N resource pairs (CMR pairs) is required, the other parameter is used for the reported joint RI index, indicating that one or more of the four rank combinations corresponding to the reported PMI and RI are allowed.

[0204] In CSI-ReportConfig, a CodebookConfig with two codebook subset restrictions (CBSRs) can be configured. The first restriction applies to the PMI reported associated with a CSI-RS resource in group 1 (within two CMR groups). The second restriction applies to the PMI reported associated with a CSI-RS resource in group 2.

[0205] In Rel.17 NCJT CSI, two RI restrictions are set: one for single TRP transmission and the other for multi-TRP transmission. In Rel.17 NCJT CSI, two codebook subset restrictions (CBSRs) are set: one for the first TRP and the other for the second TRP.

[0206] (CJT)

[0207] In Rel. 18, support for coherent joint transmission (CJT, mTRP CJT) using up to four TRPs is under study. Data from the four TRPs can be coherently precoded and sent to the UE on the same time-frequency resources. For example, the same precoding matrix can be used to consider the channels from the four TRPs. Coherence can also mean that there is a certain relationship between the phases of the multiple received signals. Joint precoding of the four TRPs can also be used to improve signal quality, eliminating interference between the four TRPs. Data can also be subject to interference only from outside the four TRPs.

[0208] In the ideal scenario (where four TRPs are co-located (considered to be identical), joint estimation of the aggregated channel matrix H is possible, and the joint precoding matrix V can be fed back. However, the large-scale path loss of the four paths can sometimes differ significantly. The joint precoding matrix V, based on a constant module codebook, is not accurate. In this case, per-TRP feedback and inter-TRP coefficients can be matched using the current NR Type 2 codebook.

[0209] For CJT with a maximum of four TRPs in FR1, the selection of the four TRPs can also be semi-static. Consequently, this selection and the configuration of the four CMRs (four CSI-RS resources) used for channel measurement can also be semi-static. Dynamic indication of the four TRPs from the list of CSI-RS resources is also possible, but less likely.

[0210] The path losses from the four TRPs to the UE are different. Therefore, it is difficult to report only one aggregated CSI representing the joint channel matrix.

[0211] Considering the fallback operation to NCJT (ie, single TRP), also consider the CSI of each TRP (ie, single TRP CSI like NCJT CSI of Rel.17).

[0212] (CJT CSI)

[0213] Assuming ideal backhaul, synchronization, and the same number of antenna ports across multiple TRPs, CSI acquisition for coherent joint transmission (CJT) in FR1 and up to four TRPs is under study. Improvements to the Rel.16 / 17 type-2 codebook are under study to support CJT multi-TRPs in FDD.

[0214] The following are being studied as CSI extensions for CJT.

[0215] CMR and IMR for measurement of up to 4 TRPs.

[0216] The CSI of each TRP is accompanied by inter-TRP CSI feedback for x-TRP CJT.

[0217] Inter-TRP CSI: New feedback and codebook for inter-TRP phase matrix / inter-TRP amplitude matrix / inter-TRP matrix (including both amplitude and phase).

[0218] Ability to add reported x-TRP CJT CQI.

[0219] As a multi-TRP CJT CSI, the following are being studied.

[0220] Restrictions on the settings of CMR / CSI for each TRP.

[0221] Inter-TRP CSI / PMI (e.g., inter-TRP phase with / without inter-TRP amplitude).

[0222] [Option 1] Independent codebook and feedback in addition to Rel.16 / 17 Type 2 codebook.

[0223] [Option 2] With W l ~ W f,l H / In W l ~ W f,l HW2 of CSI / PMI transmitted between TRPs. Common / different FD substrates for multiple TRPs.

[0224] As a multi-panel type 2CSI for multi-TRP CJT, the following is being studied.

[0225] Extension of the Type 2 codebook of Rel.16 / 17 and the Type 2 PS codebook to multiple panels.

[0226] New antenna settings for type 2 multi-panel codebook.

[0227] W1 (SD base) / W for each TRP f (FD base) can be the same or different. l (NZC) can also be different. W1 / W for each TRP f / W l You can select them together or individually. f / W l The design is preferably different scenarios with different options. φ It can be reported as a separate content or in W l The policies used relate to the deployment scenario (e.g., intra-site multiple TRPs or inter-site multiple TRPs).

[0228] For example, the precoding matrix for 4-TRP CJT CSI (codebook) can also be obtained by W1 / W for each TRP. f / W l To indicate. W1 for each TRP can be the same or different, and can be selected together or individually. l They can also be different and can be selected together or individually. f They can be the same or different, and can be selected together or individually.

[0229] In the (Rel. 18) type 2 codebook (codebook structure) for CJT multi-TRP (mTRP), at least one of the following modes (codebook modes) may also be supported.

[0230] [Mode 1]

[0231] SD / FD basis selection per TRP / per TRP group. This allows independent FD basis selection across N TRPs / TRP groups. For example, its codebook structure is given by the following formula. Here, N is the number of TRPs or TRP groups.

[0232]

[0233] [Mode 2]

[0234] The SD basis selection for each TRP / each TRP group (port group or resource) and the joint / common FD basis selection (across N TRPs / TRP groups) are given by the following codebook structure, for example, where N is the number of TRPs or TRP groups.

[0235]

[0236] In these two modes, detailed designs such as parameter combination, basis selection, TRP (group) selection, reference amplitude, and W2 quantization method can also be shared.

[0237] In the improvement of type 2 codebook, the selection of N CSI-RS resources is studied to be performed by the UE and reported as part of the CSI report. Here, N∈{1,...,N TRP}. N is the number of coordinated CSI-RS resources (TRP). N TRP It is the maximum number of coordinated CSI-RS resources (TRP), which is set by the base station via higher layer signaling.

[0238] (Priority rules for CSI reports)

[0239] In the priority rules for CSI reports, CSI reports and priority values Pri iCSI (y,k,c,s)=2･N cells ･M s ･y+N cells ･M s ･k+M s c+s are associated. For A-CSI reports delivered on PUSCH, y=0. For SP-CSI reports delivered on PUSCH, y=1. For SP-CSI reports delivered on PUCCH, y=2. For P-CSI reports delivered on PUCCH, y=3. For CSI reports that deliver L1-RSRP or L1-SINR, k=0. For CSI reports that do not deliver L1-RSRP or L1-SINR, k=1. c is the serving cell index. N cellsis the maximum number of serving cells configured (the value of the higher layer parameter maxNrofServingCells). s is the ID of the CSI report configuration (reportConfigID). s is the maximum number of configured CSI report configurations (value of the higher-layer parameter maxNrofCSI-ReportConfigurations). When the priority value associated with the first CSI report is lower than the priority value associated with the second CSI report, it means that the first CSI report takes precedence over the second CSI report (the priority of the first CSI report is higher than the priority of the second CSI report).

[0240] (CSI Processing Criteria)

[0241] The UE uses the following capability information to report the number of simultaneous CSI calculations supported (maximum number of simultaneous CSI calculations) N CPU . N CPU Indicates the number of CSI processing units (CPUs).

[0242] simultaneousCSI-ReportsPerCC within csi-ReportFramework within MIMO-ParametersPerBand. MIMO-ParametersPerBand is used to communicate MIMO-related parameters specific to a certain band. csi-ReportFramework indicates whether the UE supports the CSI reporting framework. simultaneousCSI-ReportsPerCC indicates the number of CSI reports that the UE can simultaneously measure and process reference signals within a CC in a band that provides this capability. CSI reports include periodic, semi-persistent, and aperiodic CSI, as well as any latency class and codebook type. CSI reports within simultaneousCSI-ReportsPerCC include beam reports and CSI reports.

[0243] simultaneousCSI-ReportsAllCC in CA-ParametersNR. simultaneousCSI-ReportsAllCC indicates whether the UE supports the CSI reporting framework and the number of CSI reports that the UE can process simultaneously across all CCs (master cell group (MCG) and secondary cell group (SCG) in the case of NR-DC). CSI reports have periodic, semi-persistent, and aperiodic CSI, as well as arbitrary delay levels and codebook types. CSI reports in simultaneousCSI-ReportsAllCC include beam reports as well as CSI reports. This parameter is further restricted by simultaneousCSI-ReportsPerCC and Phy-ParametersFRX-Diff in MIMO-ParametersPerBand corresponding to each band in a given band combination.

[0244] Support N in UE CPU In the case of simultaneous CSI calculations, the UE is set to have N processes for CSI reporting. CPU In the case where L CPUs are occupied for the calculation of CSI report within a given OFDM symbol, the UE has N CPU -L unused CPUs. CPU - On the same OFDM symbol where L CPUs are not occupied, N CSI reports start to occupy their own CPUs, and the CPUs of each CSI report n=0,...,N-1 within the N CSI reports are CPU （n） (CPU consumption for CSI report n) corresponds to the case where the UE does not need to update (calculate, process) the lowest priority (highest priority value Pri) that follows the priority rule. iCSI (y,k,c,s)) NM requested CSI reports. Here, 0≤M≤N is Σ n=0 M-1 O CPU （n） ≤N CPU -L The maximum value that holds.

[0245] UE does not assume that the accompanying configuration contains more than N CPU The A-CSI triggering state of the report setting (Report Setting). The processing of CSI report is as follows: Process 1 to 3, which occupies a certain number of CPUs in a certain number of symbols. The processing of CSI report consumes 0, 1, or more CPUs (0CPU , CPU consumption).

[0246] -Process 1

[0247] In the case where a CSI report is configured with CSI-ReportConfig with the higher layer parameter reportQuantity set to 'none' and CSI-RS-ResourceSet with the higher layer parameter trs-Info, CPU =0.

[0248] -Processing 2 (Beam Management)

[0249] In the CSI report accompanying CSI-ReportConfig, O CPU = 1, where the CSI-ReportConfig is accompanied by the higher-layer parameter reportQuantity set to 'cri-RSRP', 'ssb-Index-RSRP', 'cri-SINR', 'ssb-Index-SINR', 'cri-RSRP-Capability[Set]Index', 'ssb-Index-RSRP-Capability[Set]Index', 'cri-SINR-Capability[Set]Index', 'ssb-Index-SINR-Capability[Set]Index', or 'none' (when the CSI-RS-ResourceSet accompanied by the higher-layer parameter trs-Info is not set).

[0250] -Process 3

[0251] In the CSI report accompanying CSI-ReportConfig, O CPU The following processes 3-1 to 3-3 are followed, where the CSI-ReportConfig is accompanied by a higher layer parameter reportQuantity set to 'cri-RI-PMI-CQI', 'cri-RI-i1', 'cri-RI-i1-CQI', 'cri-RI-CQI', or 'cri-RI-LI-PMI-CQI'.

[0252] --Process 3-1 (the situation where the UE can use the maximum limit of UE capabilities)

[0253] In max{μ PDCCH ,μ CSI-RS ,μ UL}≤3, and L=0 CPUs are occupied, at least one PUSCH accompanying a transport block and HARQ-ACK is aperiodically triggered without an accompanying CSI report, and the CSI corresponds to a single CSI with wideband frequency-granularity and no more than four CSI-RS ports in a single resource without an accompanying CRI report, when codebookType is set to 'typeI-SinglePanel' and reportQuantity is set to 'cri-RI-CQI'. CPU =N CPU .μ PDCCH μ is the subcarrier spacing (SCS) setting of PDCCH. CSI-RS μ is the SCS setting of CSI-RS. UL It is the SCS setting of the UL BWP for sending CSI report.

[0254] --Process 3-2 (NCJT CSI situation)

[0255] When the CSI-ReportConfig with codebookType set to 'typeI-SinglePanel' is set, and the corresponding CSI-RS resource set for channel measurement is set with 2 resource groups and N resource pairs, CPU = X･N+M. Here, X is the number of CPUs occupied by the CMR pairs according to the UE capability. UE capability mTRP-CSI-numCPU-r17 indicates the number of CPUs occupied by the CMR pairs for NCJT CSI hypotheses. S = K1 + K2 resources within the NZP CSI-RS resource set for channel measurement, M1 resources and M2 resources associated with CRI values along with resource group 1 of K1 resources and resource group 2 of K2 resources, M = M1 + M2.

[0256] --Process 3-3

[0257] In other cases, O CPU =K S . K S It is the number of CSI-RS resources in the CSI-RS resource set used for channel measurement.

[0258] In a CSI report with a CSI-ReportConfig in which the higher layer parameter reportQuantity is not set to 'none', one or more CPUs are occupied during the following multiple OFDM symbols (CPU occupation duration).

[0259] A P-CSI report or SP-CSI report occupies one or more CPUs from the first symbol of the earliest resource before the corresponding CSI reference resource, in which the timing of the last CSI-RS / CSI-IM / SSB in each of the multiple CSI-RS / CSI-IM / SSB resources for channel or interference measurement is, to the last symbol of the PUSCH / PUCCH on which the report is transmitted and configured (CPU occupancy duration 1). This P-CSI report or SP-CSI report excludes the first SP-CSI report on the PUSCH after the PDCCH that triggered the report. The time during which this P-CSI report or SP-CSI report occupies one or more CPUs may also be referred to as CPU occupancy duration 1.

[0260] The A-CSI report occupies one or more CPUs from the first symbol following the PDCCH that triggered the CSI report to the last symbol of the PUSCH / PUCCH that transmitted and configured the report (CPU Occupation Duration 2). If the PDCCH reception includes two corresponding PDCCH candidates from two search space sets, the PDCCH candidate that ends later within these two PDCCH candidates is used to determine the CPU Occupation Duration. The period during which the A-CSI report occupies one or more CPUs is also referred to as CPU Occupation Duration 2.

[0261] The initial SP-CSI report on the PUSCH after a PDCCH trigger occupies one or more CPUs, starting from the first symbol after the PDCCH until the last symbol of the PUSCH in which the report was transmitted and scheduled (CPU Occupancy Duration 3). If the PDCCH reception includes two corresponding PDCCH candidates from two search space sets, the PDCCH candidate ending later among the two PDCCH candidates is used to determine the CPU Occupancy Duration. The period during which the SP-CSI report occupies one or more CPUs is also referred to as CPU Occupancy Duration 3.

[0262] In any time slot, the UE is not expected to have more active CSI-RS ports or active CSI-RS resources within the active BWP than the number reported as a capability. NZP CSI-RS resources are active for a duration (active duration) defined as follows.

[0263] The duration for an A-CSI-RS starts from the end of the PDCCH containing the request and ends at the end of the PUSCH scheduled to contain the report associated with the A-CSI-RS.

[0264] The duration for the SP-CSI-RS starts from the end of the time when the activation command is applied and ends at the end of the time when the deactivation command is applied.

[0265] The duration for the P-CSI-RS starts when the P-CSI-RS is configured through higher layer signaling and ends when the P-CSI-RS configuration is released.

[0266] In the case where a CSI-RS resource is referenced by N CSI report settings, the CSI-RS resource and the CSI-RS ports within the CSI-RS resource are counted N times.

[0267] The P-CSI-RS is always counted as an active CSI-RS regardless of whether it is received in the OFDM symbol.

[0268] The UE reports UE capability information (codebookParameter) related to the codebook for CSI reporting for each band.

[0269] codebookParameter indicates the codebook (type) and the corresponding parameters supported by the UE. Reporting parameters corresponding to Type 1 single-panel is mandatory. Reporting parameters corresponding to Type 1 multi-panel, Type 2, and Type 2 port selection is optional. The parameter may also include at least one of maxNumberTxPortsPerResource, maxNumberResourcesPerBand, and totalNumberTxPortsPerBand. maxNumberTxPortsPerResource indicates the maximum number of transmit ports within a resource. maxNumberResourcesPerBand indicates the maximum number of resources that can be used simultaneously across all CCs within a band. totalNumberTxPortsPerBand indicates the maximum number of transmit ports that can be used simultaneously across all CCs within a band.

[0270] (analyze)

[0271] Considering that multi-TRP transmission is possible, it is not clear how to set the RI limit or CBSR of CSI-ReportConfig for multi-TRP CJT CSI. If such operation is not clear, there is a concern that throughput / communication quality will be reduced.

[0272] In the CSI part 1 of the CSI report set for multi-TRP CJT CSI, it is possible to report N TRP The new CSI content includes a bitmap of bits and an indicator for combinations corresponding to one or more TRPs. The mapping order of the fields within CSI Part 1 associated with this new CSI content is unclear. If this operation is unclear, there is a concern that throughput and communication quality may be reduced.

[0273] In the CSI-ReportConfig for CJT CSI, K CSI-RS resources can be configured for K TRPs or TRP groups. The CPU usage for CJT CSI is unclear. If this operation is unclear, there is a concern that throughput and communication quality may be reduced.

[0274] Therefore, the inventors of the present invention have conceived of a setting / reporting / processing benchmark for multi-TRP CJT CSI.

[0275] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, each of the following embodiments (eg, each situation) can be used alone or in combination of at least two.

[0276] In the present disclosure, "A / B" and "at least one of A and B" may be replaced with each other. In addition, in the present disclosure, "A / B / C" may also mean "at least one of A, B, and C."

[0277] In the present disclosure, the words “notify,” “activate,” “deactivate,” “indicate,” “select,” “configure,” “update,” and “determine” may be used interchangeably. In the present disclosure, the words “support,” “control,” “controllable,” “operate,” and “operable” may also be used interchangeably.

[0278] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-layer parameters, fields, Information Elements (IEs), and settings may also be overwritten. In this disclosure, Medium Access Control (MAC) Control Elements (CEs), update commands, and activation / deactivation commands may also be overwritten.

[0279] In the present disclosure, high-layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (for example, positioning protocols (for example, NR Positioning Protocol A (NRPPa)) / LTE Positioning Protocol (LTE Positioning Protocol (LPP)))), etc.), or any one of them, or a combination thereof.

[0280] In the present disclosure, MAC signaling may include, for example, a MAC Control Element (MACCE) and a MAC Protocol Data Unit (PDU). Broadcast information may include, for example, a Master Information Block (MIB), a System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), and other system information (Other System Information (OSI)).

[0281] In the present disclosure, the physical layer signaling may also be, for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI)), etc.

[0282] In this disclosure, a b c , a_b^c can also be rewritten. In this disclosure, a b , a_b can also be rewritten. In this disclosure, a c , a^c can also be rewritten with each other. In the present disclosure, ceil(x), ceiling function, and ceiling function can also be rewritten with each other. In the present disclosure, floor(x), floor function, and floor function can also be rewritten with each other.

[0283] In the present disclosure, basis, DFT basis, basis vector, and DFT basis vector can also be replaced with each other. In the present disclosure, SD basis, SD-DFT basis, beam, SD beam, SD vector, SD 2D-DFT vector, and SD basis vector can also be replaced with each other. In the present disclosure, L, the number of SD beams, the number of beams, and the number of SD 2D-DFT vectors can also be replaced with each other. In the present disclosure, FD basis, FD-DFT basis, f i , FD beam, FD vector, FD basis vector, and FD-DFT basis vector can also be rewritten with each other.

[0284] In the present disclosure, the terms "co-phasing coefficient," "LC coefficient," "subband complex LC coefficient," and "co-phasing coefficient matrix" may be overwritten. In the present disclosure, the terms "co-phasing," "phase matching," "phase compensation," "phase adjustment," "phase difference," "phase relationship," "phase coupling," and "phase" may also be overwritten. In the present disclosure, the terms "differential" and "relative" may also be overwritten. In the present disclosure, the terms "amplitude" and "amplitude coefficient" may also be overwritten. In the present disclosure, the terms "phase" and "phase coefficient" may also be overwritten. In the present disclosure, the terms "maximum coefficient," "maximum amplitude coefficient," and "maximum amplitude" may also be overwritten. In the present disclosure, the terms "quantization table" and "quantization method" may also be overwritten.

[0285] In the present disclosure, size, length, and quantity can also be interchanged.

[0286] In the present disclosure, CJT, mTRP CJT, and CJT mTRP can also be rewritten to each other.

[0287] (Wireless Communication Method)

[0288] In each embodiment, TRP, CMR, NZP-CSI-RS resource, and CRI may also be overwritten. In each embodiment, the group / set of CMR, the group / set of NZP-CSI-RS resource, and the group / set of CRI may also be overwritten. In each embodiment, the combination / pair / set / group of TRP, the combination / pair / set / group of CMR, the combination / pair / set / group of NZP-CSI-RS resource, and the combination / pair / set / group of CRI may also be overwritten.

[0289] In various embodiments, the number of TRPs used for CJT, the number of CSI-RS resources used for CJT CSI, N, N TRP ,X,N g In each embodiment, X TRP, X-TRP, X panels, N g In each embodiment, CJTs using X TRPs, CJTs using X panels, and X-TRP CJTs can also be overwritten with each other.

[0290] In each embodiment, the reference CSI, the CSI for the reference TRP, and the first reported CSI may also override each other. 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 also override each other. In each embodiment, the TRP, CSI-RS resource, CMR, CMR group, and CSI-RS resource set may also override each other.

[0291] In each embodiment, a parameter related to the SD basis / SD basis vector, the number of beams L, a codebook parameter α, a codebook parameter setting, a parameter combination, a parameter, a parameter related to the number of SD basis vectors, a parameter related to the number of beams, one or more parameters related to the number of SD basis vectors for multiple transmission points, LL, LL for TRP#i (i=1,2,...) i , LL common to multiple TRPs, LL across multiple TRPs tot , multiple parameters LL corresponding to multiple TRP#i i , SD basis vector number, L value, and L parameter can also be rewritten mutually.

[0292] In various embodiments, a single TRP may mean that only one CMR is set, or that a CMR from one TRP is set, or that the CMR is set in the N TRP used to report the TRP selected by the UE. TRP There is only one '1' value in the bitmap of the bit, which may also mean that the combination of the number of SD basis / SD basis vectors determined has only one non-zero value for one TRP. TRP In case there is more than one '1' value in the bitmap, it may also correspond to multiple TRPs. In case the determined SD basis / number of SD basis vector combinations have more than one non-zero value for more than one TRP, it may also correspond to multiple TRPs.

[0293] In each embodiment, the TRP selection indicator, the first indicator, the indicator of the TRP selected by the UE, and the indicator indicating the selected TRP may also be overwritten with each other. In each embodiment, the combination indicator, the second indicator, the indicator of the combination of N L values, the indicator of the combination of N L values corresponding to N TRPs, and the indicator of the combination of multiple values related to the number of SD basis vectors / beams may also be overwritten with each other. In each embodiment, the total number of non-zero amplitude coefficients indicator, the total number of extended non-zero amplitude coefficients indicator, the third indicator, and the indicator related to the number of non-zero amplitude coefficients may also be overwritten with each other.

[0294] <Implementation Method #01>

[0295] N may also be reported in CSI part 1 (UCI) which indicates the TRP selected by the UE for CSI reporting. TRP Bitmap of bits. From N TRP The selection of N CSI-RS resources can also be done by the N CSI-RS resources in CSI part 1. TRPFor example, when N=4 TRPs are set and the UE selects the 1st and 3rd TRPs, the UE may also report the bitmap indicating the selection

[1010] . N=N TRP The limit setting can also be set by the base station via high-layer signaling. For example, when N=N TRP = 4 TRPs, the UE may also report CJT CSI assuming 4-TRPCJT. TRP The bitmap may not be reported. Alternatively, only one transmission hypothesis may be reported, and the UE does not need to calculate CSI for multiple transmission hypotheses.

[0296] In the improvement of the type 2 codebook for CJT mTRP, for N TRP The setting value of N, multiple values related to SD basis selection (SD basis vector selection, SD basis vector number, beam number L) L The set (list, candidate) of combinations (SD basis vector selection combination, SD basis selection combination) can also be set by the base station via high-layer (RRC) signaling. Each combination can also be N TRP L i The combination of values {L1,...,L N_TRP Here, i=1,...,N TRP , L i It can also correspond to TRP#i. L >1, from the set N L The multiple values {L1,...,L N_TRP} can also be reported in CSI Part 1 using an indicator. L =1 can also be the 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 can also be used from C(P CSI-RS / 2,L n ) code point set selection combination indicator is indicated in CSI part 2. Here, in the improvement based on Rel.16, it can also be P CSI-RS =2*N1N2. For L n The multiple candidate values supported for each parameter may include the existing multiple candidate values, that is, the candidate values {2, 4, 6} of L in the improvement based on Rel.16. In the improvement based on Rel.17, the base station may also set the corresponding candidate values {α1, ..., α N_TRP}, L n =α n PCSI-RS / 2,α n ={1 / 2,3 / 4,1} L According to the existing design, among all the selected N CSI-RS resources, the SD basis oversampling group for each CSI-RS resource can also be indicated in CSI part 2 using an indicator selected from a set of O1O2 code points.

[0297] In the configuration and selection of the SD base, for 4 TRPs, a set of multiple combinations of full TRPs, such as {6,4,2,2}, {4,4,4,2}, {6,6,2,4}, and {4,2,2,4}, can be configured by the base station. In addition, the UE can also use an indicator to select / configure a combination.

[0298] <Implementation Method #02>

[0299] The base station can also set the N for multi-TRP CJT CSI TRP = one or more CMRs for 1, 2, 3, or 4 TRPs. The UE may also report in CSI part 1 the N values representing the TRP selected by the UE. TRP The number of selected TRPs N can also be 1,...,N TRP Alternatively, for (single TRP CSI) reporting, only one TRP can be selected.

[0300] One or more settings for multi-TRP CSI (e.g., RI restriction parameters, codebook subset restriction settings, etc.) may also be set for all TRPs or per TRP. For CSI reporting in both CSI parts 1 and 2, which setting of RI restriction / CBSR is applied may also depend on the N reported in CSI part 1 to represent the TRP selected by the UE. TRP For CSI reporting in both CSI parts 1 and 2, which setting of RI restriction / CBSR is applied may also be independent of the N reported in CSI part 1 to indicate the TRP selected by the UE. TRP The bitmap is determined / set / notified.

[0301] When the two RI restrictions / CBSRs of Rel. 17 are applied to CJT CSI of Rel. 18 and later, Option 2 of Implementation #A1 and Option 2 of Implementation #A2 (four CBSRs, each for one TRP) can also be used. In this case, new RRC IEs related to the RI restrictions / CBSRs for CJT CSI can also be introduced.

[0302] <Implementation Method #A1>

[0303] One or more RI restriction parameters in the CodebookConfig within the CSI-ReportConfig for multi-TRP CJT CSI may also follow at least one of the following options.

[0304] -Option 1

[0305] The one or more RI restriction parameters may also be one RI restriction parameter. The restriction may also be applied to any transmission premise (single TRP CSI and CJT CSI).

[0306] -Option 2

[0307] The one or more RI restriction parameters may also be two RI restriction parameters. One restriction may be for a single TRP. The other restriction may be for CJT CSI. For single TRP CSI, an 8-bit bitmap may be used to represent RIs from {1, 2, 3, 4, 5, 6, 7, 8}. For CJT CSI, a 4-bit bitmap may be used to represent RIs from {1, 2, 3, 4}.

[0308] -Option 3

[0309] The one or more RI restriction parameters may also be one RI restriction parameter for single TRP CSI and one or more RI restriction parameters for CJT CSI. The one or more RI restriction parameters for CJT CSI may also follow at least one of the following options.

[0310] Option 3-1

[0311] The one or more RI restriction parameters used for the CJT CSI may also take into account the UE-based TRP selection of the x-TRP CJT CSI. For example, the one or more RI restriction parameters used for the CJT CSI may also be one RI restriction parameter used for 2-TRP CJT CSI, one RI restriction parameter used for 3-TRP CJT CSI, and one RI restriction parameter used for 4-TRP CJT CSI.

[0312] Option 3-2

[0313] The one or more RI restriction parameters used for the CJT CSI may also consider multiple different combinations of TRPs. For example, the one or more RI restriction parameters used for the CJT CSI may include one RI restriction parameter for the CJT CSI of TRP#1 and TRP#2, one RI restriction parameter for the CJT CSI of TRP#1 and TRP#3, and one RI restriction parameter for the CJT CSI of TRP#1, TRP#2, and TRP#3.

[0314] --Option 3-3

[0315] The CJT CSI may also consider multiple combinations of different L values for the number of SD substrates using one or more RI limit parameters. L In the case of multiple combinations, RI restriction parameters can be set for each combination.

[0316] Option 3-1 / 3-2 / 3-3 combinations may also be possible. For example, the one or more RI restriction parameters for the CJT CSI may include an RI restriction parameter for a TRP combination with a certain combination of L values. For example, the one or more RI restriction parameters for the CJT CSI may include an RI restriction parameter for a 2-TRP CSI combination with two TRPs. For example, the one or more RI restriction parameters for the CJT CSI may include an RI restriction parameter for a 3-TRP CJT CSI combination with three TRPs.

[0317] -Option 4

[0318] The one or more RI restriction parameters may also be one or more RI restriction parameters for a single TRP CSI and one RI restriction parameter for a CJTCSI. The one or more RI restriction parameters for a single TRP CSI may include one RI restriction parameter for each TRP or one RI restriction parameter for each TRP group.

[0319] -Option 5

[0320] The one or more RI restriction parameters may also be one or more RI restriction parameters for a single TRP CSI and one or more RI restriction parameters for a CJT CSI. The one or more RI restriction parameters for a single TRP CSI may also comply with Option 4. The one or more RI restriction parameters for a CJT CSI may also comply with Option 3.

[0321] The RI restriction parameter configuration for multi-TRP CJT CSI based on the Rel.16 type 2 codebook and the RI restriction parameter configuration for multi-TRP CJT CSI based on the Rel.17 type 2 port selection codebook may also be independently configured.

[0322] UE capabilities related to RI limitation for options 1 / 2 / 3 / 4 / 5 may also be introduced / reported.

[0323] The structure of the new codebook configuration (e.g., CodebookConfig-r18) for multi-TRP CSI under CSI-ReportConfig can also be followed for option 2 Figure 15A For example, option 3 can also be followed Figure 15B example.

[0324] Within the CSI report configuration (CSI-ReportConfig), a codebook configuration (CodebookConfig) with two RI restriction parameters (RIrestriction parameters) can be configured. In the case where one CSI-RS resource represented by the TRP-selected bitmap is required, one parameter can also be applied to the reported RI. In the case where more than one CSI-RS resource represented by the TRP-selected bitmap is required, the other parameter can also be applied to the reported RI.

[0325] According to this embodiment, the UE can be appropriately set with RI restriction parameters for multi-TRP CJT CSI.

[0326] <Implementation Method #A2>

[0327] One or more codebook subset restrictions (CBSRs) in the CodebookConfig within the CSI-ReportConfig for multi-TRP CJT CSI may also follow at least one of the following options.

[0328] -Option 1

[0329] The one or more CBSR settings may also be one CBSR setting. This restriction may also be applied to any transmission premise (single TRP CSI and CJT CSI).

[0330] -Option 2

[0331] The one or more CBSR settings may also be a maximum of four CBSR settings. Each CBSR setting may be for a single TRP or a group of TRPs. For example, the one or more CBSR settings may be four CBSR settings including one CBSR setting for TRP#1, one CBSR setting for TRP#2, one CBSR setting for TRP#3, and one CBSR setting for TRP#4. Each CBSR setting may also be applied to both a single TRP and multiple TRPs. For example, the one or more CBSR settings may be two CBSR settings including one CBSR setting for TRP#1 and TRP#2, and one CBSR setting for TRP#3 and TRP#4.

[0332] -Option 3

[0333] The one or more CBSR settings may also be a maximum of x CBSR settings. Each CBSR setting may also be used for one transmission premise. For example, the one or more CBSR settings may also include one CBSR setting for a single TRP and one CBSR setting for multiple TRPCJT CSIs. For example, the one or more CBSR settings may also include one CBSR setting for a single TRP, one CBSR setting for a 2-TRP CJT CSI, one CBSR setting for a 3-TRP CJT CSI, and one CBSR setting for a 4-TRPCJT CSI.

[0334] -Option 4

[0335] The one or more CBSR settings may also be configured to follow a combination of Option 2 and Option 3 by considering the CBSR for each TRP or each TRP group and each transmission premise. For example, the one or more CBSR settings may include one CBSR setting for a single TRP of TRP#1, one CBSR setting for a single TRP of TRP#2, one CBSR setting for a single TRP of TRP#3, one CBSR setting for a single TRP of TRP#4, one CBSR setting for TRP#1 in the case of multiple TRPs, one CBSR setting for TRP#2 in the case of multiple TRPs, one CBSR setting for TRP#3 in the case of multiple TRPs, and one CBSR setting for TRP#4 in the case of multiple TRPs. For example, the one or more CBSR settings may also include a CBSR setting for a single TRP of TRP#1, a CBSR setting for a single TRP of TRP#2, a CBSR setting for a single TRP of TRP#3, a CBSR setting for a single TRP of TRP#4, a CBSR setting for TRP#1 in the case of 2-TRP CJT, a CBSR setting for TRP#1 in the case of 3-TRP CJT, a CBSR setting for TRP#1 in the case of 4-TRP CJT, and a CBSR setting for TRP#2 in the case of 2-TRP CJT, etc. For example, the one or more CBSR settings may also include a CBSR setting for a single TRP of TRP#1, a CBSR setting for a single TRP of TRP#2, a CBSR setting for a single TRP of TRP#3, a CBSR setting for a single TRP of TRP#4, a CBSR setting for TRP#1 in the case of a 2-TRP CJT with TRP#2, a CBSR setting for TRP#1 in the case of a 2-TRP CJT with TRP#3, a CBSR setting for TRP#1 in the case of a 2-TRP CJT with TRP#4, and a CBSR setting for TRP#1 in the case of a 3-TRP CJT with TRP#2 and TRP#3, etc.

[0336] -change

[0337] The one or more CBSR settings may consider different CBSRs for different TRPs in addition to options 1 / 2 / 3 / 4, where the different TRPs are accompanied by different multiple L values in multiple combinations of L values for the number of SD substrates.

[0338] UE capabilities related to RI limitation for options 1 / 2 / 3 / 4 / variations may also be introduced / reported.

[0339] The structure of the new codebook configuration (e.g., CodebookConfig-r18) for multi-TRP CSI under CSI-ReportConfig can also be followed for option 2 Figure 16A For example, option 4 can also be followed Figure 16B example.

[0340] Within CSI-ReportConfig, a CodebookConfig with up to four CBSRs can be configured. The first restriction also applies to PMIs reported associated with the first CSI-RS resource. The second restriction also applies to PMIs reported associated with the second CSI-RS resource. The third restriction also applies to PMIs reported associated with the third CSI-RS resource. The fourth restriction also applies to PMIs reported associated with the fourth CSI-RS resource.

[0341] According to this embodiment, the UE can be appropriately set up with CBSR for multi-TRP CJT CSI.

[0342] <Implementation Method #B1>

[0343] Provisions related to the content of CSI Part 1 for CJT CSI (physical layer procedures for data) may also be introduced.

[0344] In Type 1, Type 2, Extended Type 2, and Additional Extended Type 2 Port Select CSI feedback on the PUSCH, the CSI report consists of two parts. Part 1 has a fixed payload size and is used to identify the number of information bits in Part 2. Part 1 is transmitted in its entirety before Part 2.

[0345] In extended Type 2 CSI feedback and additional extended Type 2 port selection CSI feedback (and CJT CSI), Part 1 may also include (if reported) the RI, (if reported) the TRP selection indicator, (if reported) the combination indicator, the CQI, and an indicator of the total number of non-zero amplitude coefficients across multiple layers. The RI, (if reported) the TRP selection indicator, (if reported) the combination indicator, the CQI, and an indicator of the total number of non-zero amplitude coefficients across multiple layers as fields in Part 1 may also be coded separately. Part 2 may also include the PMI for extended Type 2 CSI or additional extended Type 2 port selection CSI (or CJT CSI). Parts 1 and 2 may also be coded separately.

[0346] The aforementioned provision of “indicator of the total number of non-zero amplitude coefficients across multiple layers” may also be updated / interpreted as at least one of the following options.

[0347] -Option 1

[0348] The definition of this indicator may also not be updated.In the case of CJT CSI, this indicator may also be interpreted as an indicator of the total number of non-zero amplitude coefficients across multiple layers across the full TRP (full CMR).

[0349] -Option 2

[0350] The specification of this indicator may also be updated to be an indicator of the total number of non-zero amplitude coefficients across multiple layers across each TRP / CMR.

[0351] -Option 3

[0352] The specification of this indicator may also be updated to be an indicator of the total number of non-zero amplitude coefficients across multiple layers for the 1st TRP / CMR, the 2nd TRP / CMR, the 3rd TRP / CMR, and the 4th TRP / CMR.

[0353] -Option 4

[0354] The specification of the indicator may also be updated to be an indicator of the total number of non-zero amplitude coefficients for each layer across the full TRP. For example, the indicator may also be the total number of non-zero amplitude coefficients for the 1st layer across the full TRP, the total number of non-zero amplitude coefficients for the 2nd layer across the full TRP, the total number of non-zero amplitude coefficients for the 3rd layer across the full TRP, and the total number of non-zero amplitude coefficients for the 4th layer across the full TRP.

[0355] -Option 5

[0356] The definition of this indicator is updated as an indicator of the total number of non-zero amplitude coefficients per TRP / CMR, per layer.

[0357] -Option 6

[0358] The regulations for this indicator are obtained by adding options 2 / 3 / 4 / 5 to the existing regulations (option 1).

[0359] The indicator for option 1 can also have a single value. The indicators for options 2 / 3 / 4 / 5 can also have multiple values.

[0360] In various embodiments, the indicator of option 1 / 2 / 3 / 4 / 5 may also be referred to as a total non-zero amplitude coefficient indicator. In various embodiments, the indicator of option 2 / 3 / 4 / 5 may also be referred to as an extended total non-zero amplitude coefficient indicator.

[0361] According to this embodiment, the UE is able to appropriately report part 1 of the multi-TRP CJT CSI report.

[0362] <Implementation Method #B2>

[0363] The mapping order of the CSI fields of the CSI part 1 of the CSI report of the CJT CSI reporting mode may also be defined.

[0364] A new mapping order (new table) may also be introduced by appending at least one new content, namely, a TRP selection indicator (if reported), a combination indicator (if reported), and an extended non-zero amplitude coefficient total number indicator, to the existing mapping order (table). The order of the TRP selection indicator, combination indicator, RI, wideband CQI for the first TB, subband differential CQI for the first TB, and non-zero amplitude coefficient total number indicator in the CSI field in the new mapping order may also follow at least one of the following examples.

[0365] -Example 1

[0366] TRP selection indicator, combination indicator, RI, wideband CQI for the first TB, subband differential CQI for the first TB, total number of non-zero amplitude coefficients indicator.

[0367] -Example 2

[0368] TRP selection indicator, RI, combination indicator, wideband CQI for the first TB, subband differential CQI for the first TB, total number of non-zero amplitude coefficients indicator.

[0369] -Example 3

[0370] TRP selection indicator, RI, wideband CQI for the first TB, subband differential CQI for the first TB, combination indicator, total number of non-zero amplitude coefficients indicator.

[0371] At least one of the TRP selection indicator, the combination indicator, the RI, the wideband CQI for the first TB, the subband differential CQI for the first TB, and the non-zero amplitude coefficient total number indicator may be mapped to CSI part 1 in any order. The TRP selection indicator may be placed first among the TRP selection indicator, the combination indicator, the RI, the wideband CQI for the first TB, the subband differential CQI for the first TB, and the non-zero amplitude coefficient total number indicator. The combination indicator may be placed after the TRP selection indicator, before the non-zero amplitude coefficient total number indicator, or before the CQI.

[0372] The TRP selection indicator indicates the selected CRI. Therefore, the CRI can also be considered in the same order as the existing CRI. The combination indicator means the number of SD bases for each selected TRP. Therefore, the combination indicator can also be placed before the CSI part 1

[0373] Instead of introducing a new mapping order (a new table), the existing mapping order (the mapping order of the CSI fields in the existing table and CSI part 1 of the CSI report) can be extended, and the extended mapping order can be applied to Rel.15 / 16 / 17 Type 1 / 2 CSI and Rel.18 CJT CST based on Type 2.

[0374] Figure 17 An example of a new mapping order for the CSI fields of CSI Part 1 of a CSI report is shown. In this example, the following order is mapped to CSI Part 1 of CSI report #n: TRP selection indicator if reported, RI if reported, wideband CQI for the first TB if reported, subband differential CQI for the first TB in ascending order of subband number if reported, combination indicator if reported, and indicator of the total number of non-zero amplitude coefficients aggregated across multiple layers if reported.

[0375] Figure 18 An example of a new mapping order for the CSI fields of CSI Part 1 of a CSI report is shown. In this example, the following order is mapped to CSI Part 1 of CSI report #n: TRP selection indicator if reported, combination indicator if reported, RI if reported, wideband CQI for the first TB if reported, subband differential CQI for the first TB in ascending order of subband number if reported, and indicator of the total number of non-zero amplitude coefficients across all layers if reported.

[0376] Figure 19An example of a new mapping order of the CSI fields in the CSI part 1 of a CSI report is shown. In this example, Option 3 of Embodiment #B1 can also be applied. In this example, mapped to CSI part 1 of CSI report #n in the following order: TRP selection indicator if reported, RI if reported, combination indicator if reported, wideband CQI for the 1st TB if reported, subband differential CQI for the 1st TB in ascending order of accompanying subband sequence if reported, indicator of the total number of non-zero amplitude coefficients totaled across all layers for the 1st CSI-RS resource if reported, indicator of the total number of non-zero amplitude coefficients totaled across all layers for the 2nd CSI-RS resource if reported, indicator of the total number of non-zero amplitude coefficients totaled across all layers for the 3rd CSI-RS resource if reported, indicator of the total number of non-zero amplitude coefficients totaled across all layers for the 4th CSI-RS resource if reported.

[0377] Figure 20 An example of a new mapping order for CSI fields in CSI part 1 of a CSI report is shown. In this example, the following order is mapped to CSI part 1 of CSI report #n: CRI if reported, TRP selection indicator if reported, combination indicator if reported, RI if reported, wideband CQI for the first TB if reported, subband differential CQI for the first TB in ascending order with subband index if reported, indicator of the number of non-zero amplitude coefficients M0 for layer 0 if reported, (if rank equals 1 following the reported RI and) two-layer PMI reporting is allowed if rank restriction is followed, and indicator of the number of non-zero amplitude coefficients M1 for layer 1 if reported.

[0378] Figure 21An example of a new mapping order for CSI fields of CSI part 1 of a CSI report is shown. In this example, the following order is mapped to CSI part 1 of CSI report #n: CRI if reported, TRP selection indicator if reported, RI if reported, combination indicator if reported, wideband CQI for the first TB if reported, subband differential CQI for the first TB in ascending order with subband sequence number if reported, indicator of the number of non-zero amplitude coefficients M0 for layer 0 if reported, indicator of the number of non-zero amplitude coefficients M1 for layer 1 (if rank equals 1 following the reported RI and) if rank restriction is followed and 2-layer PMI reporting is allowed, if reported, number of non-zero amplitude coefficients K totaled across all layers if reported NZ an indicator of the total number of non-zero amplitude coefficients for the first CSI-RS resource, if reported, total across all layers for the second CSI-RS resource, if reported, total across all layers for the third CSI-RS resource, if reported, and total across all layers for the fourth CSI-RS resource, if reported.

[0379] According to this embodiment, the UE is able to appropriately map multiple TRP CJTs to part 1 of the CSI report.

[0380] <Implementation Method #C1>

[0381] The CPU occupation for K CSI-RS resources (CMRs) can also be related to the number of configured CMRs K, the number of reported / selected CMRs K, and the number of select , and the number N of combinations set for the SD base L The UE may also determine the CPU usage based on the K CSI-RS resources (CMRs) configured for CJT CSI.

[0382] Figure 22 An example of the process of determining CPU usage is shown. In S110, the UE may also report new UE capabilities related to CJT CSI. The new UE capabilities may also be related to the maximum number N of CSI reports that the UE may process simultaneously. CPUNext, in S120, the UE may also receive a CSI report setting related to CJT CSI. Next, in S130, the UE may also determine the CPU occupancy (CPU consumption number) related to CJT CSI based on the CSI report setting. Next, in S140, the UE may also process CSI calculation / reporting related to CJT CSI based on the CPU occupancy. The UE may also determine the total number of CPU consumption occupied in the same symbol as N. CPU The CSI report is processed under the following conditions. For example, the total number of CPUs consumed in the same symbol exceeds N CPU In the case of N, the UE can also process the total number of CPUs consumed in the same code element in descending order of priority (ascending order of priority value). CPU The following CSI report.

[0383] The CPU usage (CPU consumption) of K CSI-RS resources set for CJT CSI is O CPU At least one of the following options may also be followed.

[0384] -Option 1

[0385] O CPU = Y. Here, Y may also be the number of CPUs occupied by K CSI-RS resources used for CJT CSI, based on the new UE capability. Different / multiple values of Y may also be defined for different values of K. For K=2, Y=2 / 3 / 4 may be used. For K=2, Y=3 / 4 / 5 / 6 may be used. For K=4, Y=4 / 5 / 6 / 7 / 8 may be used.

[0386] -Option 2

[0387] Here, X may also be the number of CPUs occupied by each of the multiple CSI-RS resources (K CSI-RS resources) used for CJT CSI, based on the new UE capability. Different / multiple values of X may also be defined for different values of K. For K=1 / 2 / 3 / 4, X=1 / 2 / 3 may also be defined.

[0388] --change

[0389] O CPU =K+Z. Here, Z can also be the number of additional CPUs required. Z can be combined with K and K select At least one of them may be associated or not associated.

[0390] -Option 3

[0391] Here, X can also be a new UE capability as a premise / condition, which is composed of multiple CSI-RS resources (K select The number of CPUs occupied by each of the CSI-RS resources. select CSI-RS resources can also be obtained through N TRP It is represented by a bitmap of bits.

[0392] --change

[0393] O CPU =K select +Z. Here, Z can also be the number of additional CPUs required. Z can be combined with K and K select At least one of them may be associated or not associated.

[0394] -Option 4

[0395] Here, X1 can also be based on the new UE capability as a premise / condition, and the multiple CSI-RS resources (K select The number of CPUs occupied by each of the CSI-RS resources). X2 can also be based on other new UE capabilities as a prerequisite / condition, and the unselected CSI-RS resources ((KK select The number of CPUs occupied by each of the ) CSI-RS resources).

[0396] -Option 5

[0397] Here, X may also be the number of CPUs occupied by each of a plurality of CSI-RS resources (K CSI-RS resources) accompanying one SD basis for CJT CSI, based on / conditional to the new UE capability.

[0398] --change

[0399] O CPU =K+Z1+Z2 or or Here, Z1 can also be the number of additional CPUs required for multiple CMRs. Z1 can be combined with K and K select Z2 can also be associated with at least one of N or not. Z2 can also be the number of CPUs required for multiple combinations of SD bases. Z2 can be associated with N L You can associate or not associate.

[0400] -Option 6

[0401] Here, X may also be the number of CPUs occupied by each of the multiple CSI-RS resources (K CSI-RS resources) used for CJT CSI, based on / conditional to the new UE capability. Z may also be the number of CPUs occupied by each of the multiple combinations used for CJT CSI, based on / conditional to other new UE capabilities.

[0402] O CPU A combination of options 1 / 2 / 3 / 4 / 5 / 6 may also be used. Y / X / Z / X1 / X2 / Z1 / Z2 may also be reported as UE capabilities, which may or may not be integers.

[0403] In options 1 / 2 / 3 / 4 / 5 / 6, O CPU Alternatively, one CSI-RS resource may be counted for every K CSI-RS resources (K CMRs, CMR groups, or CMR pairs).

[0404] According to this embodiment, the UE can appropriately determine the CPU occupancy for CJT CSI.

[0405] <Implementation Method #C2>

[0406] In addition to being associated with one or K NZP CSI-RS resources, and N L In addition to the UE capabilities related to the number of CPUs occupied by at least one combination, new UE capabilities for CJT CSI can also be introduced / reported. The new UE capability can also be at least one of the following UE capabilities.

[0407] -UE Capability 1

[0408] The maximum number K of CMRs used for CJT CSI. K can be 2, 3, or 4.

[0409] -UE Capability 2

[0410] Maximum number of Tx ports in one NZP CSI-RS resource associated with CJT measurements.

[0411] -UE Capability 3

[0412] The maximum value of the total number of Tx ports in one NZP CSI-RS resource associated with CJT measurement.

[0413] -UE Capability 4

[0414] Selection of TRPs and reporting support.

[0415] -UE Capability 5

[0416] Combination selection and reporting support.

[0417] UE capabilities 1 / 2 / 3 / 4 / 5 may also be UE capabilities for each codebook type. The codebook type may also be at least one of CJT CSI based on extended (Rel. 16) Type 2 CSI and CJT CSI based on additional extended (Rel. 17) Type 2 port selection. In the case of CJT CSI based on additional extended Type 2 port selection, the UE capability may also be separate UE capabilities for at least one of different values of M (FD basis window), different values of R (the relationship between PMI subband and CQI subband), and different values of rank (for example, separate for ranks 1 and 2 and ranks 3 and 4).

[0418] For different values of K (TRP number), UE capabilities 1 / 2 / 3 / 4 / 5 may also be different values.

[0419] In the presence of CJT CSI, the activated CSI-RS resources and ports may also follow at least one of the following options.

[0420] -Option 1

[0421] List of codebook combinations. This combination can also be a combination with a type 1 single-panel or type 1 multi-panel codebook.

[0422] -Option 2

[0423] For each codebook combination, a list of at least one of a maximum number of ports per resource, a maximum number of resources, and a maximum total number of ports.

[0424] <Supplement>

[0425] [Notification of information to UE]

[0426] In the above-mentioned embodiment, the notification of arbitrary information (from the network (NW)) (e.g., the base station (BS))) to the UE (in other words, the reception of arbitrary information from the BS in the UE) can also be performed using physical layer signaling (e.g., DCI), high-layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PDCCH, PDSCH, reference signals) or a combination thereof.

[0427] When the above notification is performed through a MAC CE, the MAC CE may be identified by including a new logical channel ID (Logical Channel ID (LCID)) not specified in existing specifications in the MAC subheader.

[0428] In the case where the above-mentioned notification is performed through DCI, the above-mentioned notification may also be performed through a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used for scrambling cyclic redundancy check (CRC) bits assigned to the DCI, the format of the DCI, and the like.

[0429] Furthermore, the notification of arbitrary information to the UE in the above-mentioned embodiments may be performed periodically, semi-continuously, or aperiodically.

[0430] [Notification of information from UE]

[0431] The notification of arbitrary information from the UE (to the NW) in the above-mentioned embodiment (in other words, the sending / reporting of arbitrary information from the UE to the BS) can also be carried out using physical layer signaling (e.g., UCI), high-layer signaling (e.g., RRC signaling, MACCE), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signals) or a combination thereof.

[0432] When the above notification is performed through MAC CE, the MAC CE can also be identified by including a new LCID that is not specified in the existing specifications in the MAC subheader.

[0433] When the notification is performed using UCI, the notification may be transmitted using PUCCH or PUSCH.

[0434] Furthermore, the notification of arbitrary information from the UE in the above-mentioned embodiments may be performed periodically, semi-continuously, or aperiodically.

[0435] [Regarding the application of each embodiment]

[0436] At least one of the above embodiments may also be applied to a situation where a specific condition is satisfied. The specific condition may be specified in a specification or may be notified to the UE / BS using higher layer signaling / physical layer signaling.

[0437] At least one of the above-mentioned embodiments may also be applied only to UEs that report a specific UE capability (UE capability) or support the specific UE capability.

[0438] The specific UE capability may also indicate at least one of the following:

[0439] Supports specific processing / operation / control / information related to at least one of the above-mentioned embodiments.

[0440] The maximum number of combinations of values related to the number of SD basis vectors.

[0441] L for a TRP#i i For example, whether L i The candidate value is 0. For example, whether L i For example, whether L i The candidate value of 6.

[0442] L for all TRP#i i Total (total, L1+...+L N_TRP ) maximum number.

[0443] N TRP A bitmap reporting whether bits are omitted.

[0444] Maximum number of CSI reports N that the UE can process simultaneously CPU .

[0445] In addition, the above-mentioned specific UE capabilities can be capabilities that are applied across the entire frequency (commonly regardless of frequency), or capabilities for each frequency (for example, one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), or capabilities for each frequency range (for example, Frequency Range 1 (FR1)), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities for each feature set (Feature Set (FS)) or feature set per component carrier (FeatureSet Per Component-carrier (FSPC)).

[0446] Furthermore, the specific UE capability may be a capability applied across all duplex modes (common regardless of the duplex mode) or a capability for each duplex mode (eg, time division duplex (TDD) or frequency division duplex (FDD)).

[0447] Furthermore, at least one of the aforementioned embodiments may also be applied to a case where specific information associated with the aforementioned embodiments is configured / activated / triggered by the UE (or an action of the aforementioned embodiments is performed) via higher layer signaling / physical layer signaling. For example, the specific information may include information indicating activation, arbitrary RRC parameters for a specific release (e.g., Rel. 18 / 19), and the like.

[0448] The UE may also apply Rel.15 / 16 operations, for example, when it does not support at least one of the above-mentioned specific UE capabilities or is not set with the above-mentioned specific information.

[0449] (Note)

[0450] The following inventions are added to one embodiment of the present disclosure.

[0451] [Note 1]

[0452] A terminal having:

[0453] a receiving unit configured to receive a channel state information (CSI) report configuration including one or more parameters, wherein the one or more parameters represent at least one of a rank indicator restriction and a codebook subset restriction; and

[0454] The control unit applies the one or more parameters to the coherent joint transmission CSI and controls the reporting of the CSI.

[0455] [Note 2]

[0456] The terminal as described in Supplement 1, wherein:

[0457] The control unit applies the one or more parameters to both the coherent joint transmission CSI and the single transmission reception point CSI.

[0458] [Note 3]

[0459] The terminal as described in Supplement 1 or Supplement 2, wherein:

[0460] The configuration includes the one or more parameters indicating the rank indicator restriction for the coherent joint transmission of CSI and one parameter indicating the rank indicator restriction for a single transmission reception point CSI.

[0461] [Note 4]

[0462] The terminal according to any one of Supplement 1 to Supplement 3, wherein:

[0463] The configuration includes the one or more parameters indicating codebook subset restriction for the coherent joint transmission of CSI and one parameter indicating codebook subset restriction for single transmission reception point CSI.

[0464] (Note)

[0465] The following inventions are added to one embodiment of the present disclosure.

[0466] [Note 1]

[0467] A terminal having:

[0468] a receiving unit that receives a configuration of a channel state information (CSI) report for coherent joint transmission; and

[0469] A control unit determines, based on the setting, a plurality of transmit receive points (TRPs) for the coherent joint transmission, and maps a first indicator representing the TRPs, a second indicator representing a combination of multiple values of a parameter related to the number of beams, and a third indicator related to the number of non-zero amplitude coefficients to CSI part 1 of the CSI report.

[0470] [Note 2]

[0471] The terminal as described in Supplement 1, wherein:

[0472] The third indicator represents at least one of the following: the total number of non-zero amplitude coefficients for the multiple TRPs and all layers, the total number of non-zero amplitude coefficients for each TRP and all layers, the total number of non-zero amplitude coefficients for the multiple TRPs and each layer, and the total number of non-zero amplitude coefficients for each TRP and each layer.

[0473] [Note 3]

[0474] The terminal as described in Supplement 1 or Supplement 2, wherein:

[0475] The control unit maps the second indicator to be later than the first indicator and earlier than the third indicator.

[0476] [Note 4]

[0477] The terminal according to any one of Supplement 1 to Supplement 3, wherein:

[0478] The first indicator is a bitmap.

[0479] (Note)

[0480] The following inventions are added to one embodiment of the present disclosure.

[0481] [Note 1]

[0482] A terminal having:

[0483] a receiving unit that receives a configuration of a channel state information (CSI) report for coherent joint transmission; and

[0484] The control unit determines, based on the setting, the number of CSI processing units occupied in the calculation of the CSI report.

[0485] [Note 2]

[0486] The terminal as described in Supplement 1, wherein:

[0487] The control unit determines the number of the CSI processing units based on at least one of the following information: the number of configured channel measurement resources, the number of channel measurement resources selected for the CSI report, and the number of combinations of multiple values of a parameter related to the number of beams.

[0488] [Note 3]

[0489] The terminal as described in Supplement 1 or Supplement 2, wherein:

[0490] The control unit determines the number of CSI processing units based on at least one information including the number of set channel measurement resources, the number of channel measurement resources selected for the CSI report, the number of combinations of multiple values of a parameter related to the number of beams, and the number of additional CSI processing units.

[0491] [Note 4]

[0492] The terminal according to any one of Supplement 1 to Supplement 3, wherein:

[0493] The control unit controls reporting of capability information indicating a maximum number of channel measurement resources used for the CSI reporting.

[0494] (Wireless Communication System)

[0495] The following describes a configuration of a wireless communication system according to an embodiment of the present disclosure. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof.

[0496] Figure 23This figure illustrates an example of a schematic configuration of a wireless communication system according to one embodiment. Wireless communication system 1 (also referred to simply as system 1) may be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth-generation mobile communication system New Radio (5GNR), or the like.

[0497] In addition, the wireless communication system 1 may also support dual connectivity between multiple radio access technologies (Radio Access Technologies (RATs)) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may also 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.

[0498] In EN-DC, the LTE (E-UTRA) base station (eNB) is the Master Node (MN), and the NR base station (gNB) is the 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.

[0499] The wireless communication system 1 may also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both the MN and the SN are NR base stations (gNB)).

[0500] The wireless communication system 1 may also include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are deployed within the macrocell C1 and form small cells C2 that are narrower than the macrocell C1. User terminals 20 may also be located within at least one of the cells. The arrangement and number of cells and user terminals 20 are not limited to those shown in the figure. Hereinafter, when not distinguishing between base stations 11 and 12, they are collectively referred to as base stations 10.

[0501] 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).

[0502] 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)). Macrocell C1 may be included in FR1, and small cell C2 may be included in FR2. For example, FR1 may be a frequency band below 6 GHz (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). The frequency bands and definitions of FR1 and FR2 are not limited to these. For example, FR1 may correspond to a frequency band higher than FR2.

[0503] Furthermore, in each CC, the user terminal 20 may communicate using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0504] Multiple base stations 10 may be connected via wired (e.g., optical fiber based on the Common Public Radio Interface (CPRI), an X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11, which functions as a host station, may be referred to as an Integrated Access Backhaul (IAB) donor, and base station 12, which functions as a relay station (relay), may be referred to as an IAB node.

[0505] The base station 10 may be connected to the core network 30 via other base stations 10 or directly. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0506] The core network 30 may also include network functions (NFs), such as the User Plane Function (UPF), Access and Mobility Management Function (AMF), Session Management Function (SMF), Unified Data Management (UDM), Application Function (AF), Data Network (DN), Location Management Function (LMF), and Operation, Administration, and Maintenance (Management) (OAM). Furthermore, a single network node may provide multiple functions. Furthermore, communication with external networks (e.g., the Internet) may be performed via the DN.

[0507] The user terminal 20 may also be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0508] In the wireless communication system 1 , a radio access scheme based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), or single carrier frequency division multiple access (SC-FDMA) may be used.

[0509] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1 , other radio access schemes (eg, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0510] As downlink channels, the wireless communication system 1 may use 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.

[0511] In addition, as uplink channels, the wireless communication system 1 can also use 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.

[0512] The PDSCH transmits user data, higher-layer control information, and the System Information Block (SIB). The PUSCH also transmits user data and higher-layer control information. The PBCH also transmits the Master Information Block (MIB).

[0513] The PDCCH may also transmit lower layer control information, which may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of the PDSCH and the PUSCH.

[0514] In addition, the DCI that schedules the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be rewritten as DL data, and the PUSCH may also be rewritten as UL data.

[0515] PDCCH detection also utilizes a control resource set (CORESET) and a search space. A CORESET corresponds to the resources for searching for DCI. A search space corresponds to the search area and search method for PDCCH candidates. A CORESET can be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space configuration.

[0516] A search space may also correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. Furthermore, the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and so on, used in this disclosure, may be interchangeable.

[0517] The PUCCH can also transmit uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH can also transmit the random access preamble used to establish a connection with a cell.

[0518] In the present disclosure, downlink, uplink, etc. may be expressed without the word “link.” In addition, various channels may be expressed without the word “Physical” at the beginning.

[0519] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), and the like may also be transmitted. In the wireless communication system 1, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), and a phase tracking reference signal (PTRS) may also be transmitted as DL-RS.

[0520] For example, a synchronization signal may be at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SSs (PSS, SSS) and PBCHs (and DMRS for the PBCH) may also be referred to as an SS / PBCH block or an SS block (SSB). Furthermore, SSs and SSBs may also be referred to as reference signals.

[0521] In addition, as an uplink reference signal (UL-RS), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted in the wireless communication system 1. DMRS is also called a user terminal-specific reference signal (UE-specific Reference Signal).

[0522] (Base Station)

[0523] Figure 24 This figure illustrates an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission path interface (transmission line interface) 140. Furthermore, one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140 may be provided.

[0524] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also conceivable that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0525] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which this disclosure relates.

[0526] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. It may also control transmission, reception, and measurement using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transceiver unit 120. The control unit 110 may also perform call processing (e.g., setup and release) of communication channels, manage the status of the base station 10, and manage radio resources.

[0527] Transmitter / receiver unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. Baseband unit 121 may also include a transmit processing unit 1211 and a receive processing unit 1212. Transmitter / receiver unit 120 may include a transmitter / receiver, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmit / receive circuits, and the like, as described based on common knowledge in the technical fields involved in this disclosure.

[0528] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0529] The transmitting and receiving antenna 130 can be formed of an antenna described based on common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0530] The transmitting and receiving unit 120 may also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the aforementioned uplink channel, uplink reference signal, etc.

[0531] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0532] The transmitting and receiving unit 120 (transmitting processing unit 1211) may also perform processing on the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (e.g., RLC retransmission control), the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), etc. on the data and control information obtained from the control unit 110, to generate a bit string to be transmitted.

[0533] The transmitting and receiving unit 120 (transmitting processing unit 1211) may also perform transmission processing such as channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion, etc. on the bit sequence to be transmitted, and output a baseband signal.

[0534] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0535] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filtering, and demodulation into baseband signals on the radio frequency band signals received via the transmitting and receiving antenna 130 .

[0536] The transmitting and receiving unit 120 (receiving processing unit 1212) may also apply receiving processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filtering processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to obtain user data, etc.

[0537] The transmitting / receiving unit 120 (measuring unit 123) may also perform measurements related to received signals. For example, the measuring unit 123 may perform radio resource management (RRM) measurements and channel state information (CSI) measurements based on the received signals. The measuring unit 123 may also 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)), and propagation path information (e.g., CSI). The measurement results may also be output to the control unit 110.

[0538] The transmission path interface 140 can also send and receive signals (return signaling) between the devices included in the core network 30 (for example, the network node providing NF), other base stations 10, etc., and can also obtain and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0539] In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 120 , the transmitting and receiving antenna 130 , and the transmission path interface 140 .

[0540] In addition, the transmitting / receiving unit 120 may also transmit a channel state information (CSI) report configuration including one or more parameters indicating at least one of a rank indicator restriction and a codebook subset restriction. The control unit 110 may also apply the one or more parameters in the coherent joint transmission of CSI and control the reception of the CSI report.

[0541] Furthermore, the transmitting / receiving unit 120 may also transmit a configuration for a channel state information (CSI) report for coherent joint transmission. The control unit 110 may also determine, based on the configuration, a plurality of transmit / receive points (TRPs) for the coherent joint transmission, map a first indicator representing the TRPs, a second indicator representing a combination of multiple values of a parameter related to the number of beams, and a third indicator related to the number of non-zero amplitude coefficients to CSI part 1 of the CSI report, and control reception of CSI part 1.

[0542] In addition, the transmitting and receiving unit 120 may also transmit a configuration of a channel state information (CSI) report for coherent joint transmission. The control unit 110 may also determine the number of CSI processing units occupied by the calculation of the CSI report based on the configuration.

[0543] (User Terminal)

[0544] Figure 25 This figure shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Furthermore, more than one of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0545] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0546] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which this disclosure relates.

[0547] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission, reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transmission and reception unit 220.

[0548] The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transceiver circuit, and the like, which are described based on common knowledge in the technical fields involved in this disclosure.

[0549] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit or may be composed of a transmitting unit and a receiving unit. The transmitting unit may also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0550] The transmitting and receiving antenna 230 can be formed of an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0551] The transmitting and receiving unit 220 may also receive the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the aforementioned uplink channel, uplink reference signal, etc.

[0552] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0553] The transmitting and receiving unit 220 (transmitting processing unit 2211 ) may also perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data and control information obtained from the control unit 210 to generate a bit sequence to be transmitted.

[0554] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output a baseband signal.

[0555] Furthermore, whether or not to apply DFT processing may also be determined based on the transform precoding configuration. For a particular channel (e.g., PUSCH), if transform precoding is enabled, the transceiver unit 220 (transmit processing unit 2211) may perform DFT processing as part of the aforementioned transmission process in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transceiver unit 220 (transmit processing unit 2211) may perform DFT processing as part of the aforementioned transmission process.

[0556] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0557] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 230 .

[0558] The transmitting and receiving unit 220 (receiving processing unit 2212) may also apply receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0559] The transmitting / receiving unit 220 (measuring unit 223) may also perform measurements related to received signals. For example, the measuring unit 223 may also perform RRM measurements and CSI measurements based on the received signals. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), and other information. The measurement results may also be output to the control unit 210.

[0560] In addition, the measurement unit 223 may also derive channel measurements for CSI calculation based on channel measurement resources. Channel measurement resources may also be, for example, non-zero power (NZP) CSI-RS resources. In addition, the measurement unit 223 may also derive interference measurements for CSI calculation based on interference measurement resources. Interference measurement resources may also be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, and the like. In addition, CSI-IM may also be referred to as CSI-Interference Management (IM) and may be interchangeable with Zero Power (ZP) CSI-RS. In addition, in the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeable.

[0561] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0562] In addition, the transmitting and receiving unit 220 may also receive a channel state information (CSI) reporting configuration including one or more parameters indicating at least one of a rank indicator restriction and a codebook subset restriction. The control unit 210 may also apply the one or more parameters to the coherent joint transmission of CSI to control the reporting of the CSI.

[0563] The control unit 210 may also apply the one or more parameters to both the coherent joint transmission CSI and the single transmission reception point CSI.

[0564] The configuration may also include the one or more parameters indicating the rank indicator restriction for the coherent joint transmission of CSI and one parameter indicating the rank indicator restriction for single transmission reception point CSI.

[0565] The configuration may also include the one or more parameters indicating the codebook subset restriction for the coherent joint transmission of CSI and one parameter indicating the codebook subset restriction for single transmission reception point CSI.

[0566] In addition, the transmitting and receiving unit 220 may also receive a configuration for a channel state information (CSI) report for coherent joint transmission. Based on the configuration, the control unit 210 may also determine a plurality of transmit and receive points (TRPs) for the coherent joint transmission, and map a first indicator representing the TRPs, a second indicator representing a combination of multiple values of a parameter related to the number of beams, and a third indicator related to the number of non-zero amplitude coefficients to CSI part 1 of the CSI report.

[0567] The third indicator may also represent any one of the following: the total number of non-zero amplitude coefficients for the multiple TRPs and all layers, the total number of non-zero amplitude coefficients for each TRP and all layers, the total number of non-zero amplitude coefficients for the multiple TRPs and each layer, and the total number of non-zero amplitude coefficients for each TRP and each layer.

[0568] The control unit 210 may also map the second indicator to a position later than the first indicator and earlier than the third indicator.

[0569] The first indicator may also be a bitmap.

[0570] In addition, the transmitting and receiving unit 220 may also receive a configuration of a channel state information (CSI) report for coherent joint transmission. The control unit 210 may also determine the number of CSI processing units occupied by the calculation of the CSI report based on the configuration.

[0571] The control unit 210 may also determine the number of the CSI processing units based on at least one of the following information: the number of set channel measurement resources, the number of channel measurement resources selected for the CSI report, and the number of combinations of multiple values of parameters related to the number of beams.

[0572] The control unit 210 may also determine the number of CSI processing units based on at least one information including the number of set channel measurement resources, the number of channel measurement resources selected for the CSI report, the number of combinations of multiple values of parameters related to the number of beams, and the number of additional CSI processing units.

[0573] The control unit 210 may also control reporting of capability information indicating a maximum number of channel measurement resources used for the CSI reporting.

[0574] (Hardware structure)

[0575] Furthermore, the block diagrams used in the description of the above embodiments illustrate blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. Furthermore, the implementation method of each functional block is not particularly limited. Specifically, each functional block can be implemented using a single device that is physically or logically combined, or by connecting two or more physically or logically separate devices directly or indirectly (e.g., by wired or wireless connections) to implement these multiple devices. A functional block can also be implemented by combining one or more of these devices with software.

[0576] Here, the term "function" includes, but is not limited to, judging, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. For example, a functional block (structural unit) that implements a transmitting function may also be referred to as a transmitting unit, a transmitter, or the like. Any of these terms are as described above, and their implementation methods are not particularly limited.

[0577] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 26This figure shows an example of the hardware configuration of a base station and a user terminal according to one embodiment. The base station 10 and user terminal 20 described above can also 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, and a bus 1007.

[0578] In this disclosure, the terms "device," "circuit," "equipment," "section," and "unit" are interchangeable. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figures, or may exclude some of the devices.

[0579] For example, although only one processor 1001 is shown, multiple processors may be provided. Furthermore, processing may be performed by a single processor, or by two or more processors simultaneously, sequentially, or using other methods. Furthermore, processor 1001 may be implemented using more than one chip.

[0580] The functions of the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or by controlling at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0581] Processor 1001 controls the entire computer by, for example, operating an operating system. Processor 1001 may also be comprised of a central processing unit (CPU) including interfaces with peripheral devices, a control device, a computing device, registers, and the like. For example, at least a portion of the aforementioned control unit 110 (210) and transceiver unit 120 (220) may also be implemented by processor 1001.

[0582] Furthermore, the processor 1001 reads programs (program code), 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 based on these programs. As a program, a program that causes a computer to execute at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and executed by the processor 1001, and the other functional blocks can also be implemented similarly.

[0583] Memory 1002 may also be a computer-readable recording medium, such as at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or other suitable storage medium. Memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), or the like. Memory 1002 can store executable programs (program code), software modules, and the like for implementing the wireless communication method according to an embodiment of the present disclosure.

[0584] Storage 1003 may also be a computer-readable recording medium, such as at least one of a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM))), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, stick, or key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0585] The communication device 1004 is hardware (a transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network. For example, it is also referred to as a network device, a network controller, a network card, a communication module, etc. In order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the aforementioned transmitting and receiving unit 120 (220) and the transmitting and receiving antenna 130 (230) may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be implemented by a transmitting unit 120a (220a) and a receiving unit 120b (220b) that are physically or logically separated.

[0586] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, light-emitting diode (LED) lamp, etc.). Alternatively, the input device 1005 and output device 1006 may be integrated (e.g., a touch panel).

[0587] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0588] Furthermore, the base station 10 and user terminal 20 may also 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 may use this hardware to implement part or all of each functional block. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0589] (Variation)

[0590] In addition, the terms described in this disclosure and the terms required for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be replaced with each other. In addition, a signal may also be a message. Reference Signal (RS) may also be referred to as RS, and may also be referred to as Pilot, Pilot Signal, etc. depending on the applied standard. In addition, Component Carrier (CC) may also be referred to as Cell, Frequency Carrier, Carrier Frequency, etc.

[0591] A radio frame can also be composed of one or more time periods (frames) in the time domain. Each of these one or more time periods (frames) that make up a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (for example, 1ms) that is independent of the numerology.

[0592] Here, a parameter set may also refer to communication parameters applied to at least one of the transmission and reception of a signal or channel. For example, the parameter set may also represent at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0593] In the time domain, a slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) Furthermore, a slot can also be a time unit based on a parameter set.

[0594] A time slot may also contain multiple mini-slots. Each mini-slot may also consist of one or more symbols in the time domain. Furthermore, a mini-slot may also be referred to as a sub-slot. A mini-slot may also consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-slots may also be referred to as PDSCH (PUSCH) mapping type B.

[0595] Radio frames, subframes, time slots, mini-slots, and symbols all represent time units used for signal transmission. Radio frames, subframes, time slots, mini-slots, and symbols may also be referred to by their respective equivalents. Furthermore, the time units of frame, subframe, time slot, mini-slot, and symbol in this disclosure may be interchangeable.

[0596] For example, a subframe can be called a TTI, multiple consecutive subframes can be called a TTI, and a slot or a mini-slot can be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Furthermore, the unit representing a TTI can be called a slot, a mini-slot, or the like, rather than a subframe.

[0597] Here, TTI refers to, for example, the minimum time unit used for scheduling in wireless communications. For example, in the LTE system, a base station schedules each user terminal by allocating radio resources (such as the frequency bandwidth and transmit power available to each user terminal) in TTI units. The definition of TTI is not limited to this.

[0598] A TTI can also be a unit of time for transmitting channel-coded data packets (transport blocks), code blocks, code words, etc., and can also be a unit of processing for scheduling, link adaptation, etc. Furthermore, when a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0599] Furthermore, while a time slot or mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-slots) can also be the minimum time unit for scheduling. Furthermore, the number of time slots (mini-slots) that constitute this minimum time unit for scheduling can also be controlled.

[0600] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini-slot, a subslot, a time slot, etc.

[0601] In addition, a long TTI (e.g., normal TTI, subframe, etc.) can also be rewritten as a TTI with a time length exceeding 1ms, and a short TTI (e.g., shortened TTI, etc.) can also be rewritten as a TTI with a TTI length shorter than the long TTI and longer than 1ms.

[0602] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it may also include one or more consecutive subcarriers (subcarriers). The number of subcarriers contained in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in an RB can also be determined based on the parameter set.

[0603] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks.

[0604] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0605] 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.

[0606] A Bandwidth Part (BWP) (also known as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a particular parameter set within a carrier. Common RBs can also be identified by their index relative to the common reference point for that carrier. PRBs can also be defined within a BWP and numbered within that BWP.

[0607] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured within one carrier.

[0608] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive specific signals / channels outside the activated BWP.

[0609] The above-mentioned structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots within a slot, the number of symbols and RBs within a slot or mini-slot, the number of subcarriers within an RB, the number of symbols within a TTI, the symbol length, and the cyclic prefix (CP) length can be varied in various ways.

[0610] Furthermore, the information and parameters described in this disclosure may be expressed as absolute values, relative values relative to a specific value, or other corresponding information. For example, wireless resources may be indicated by specific indexes.

[0611] The names used for parameters, etc. in this disclosure are not intended to be limiting in any respect. Furthermore, the mathematical formulas used for these parameters may differ from those explicitly disclosed in this disclosure. Various channels (such as PUCCH and PDCCH) and information elements can be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any respect.

[0612] Information, signals, and the like described in this disclosure may also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referred to throughout the foregoing description may also be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

[0613] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0614] Input and output information, signals, etc. can be stored in a specific location (e.g., memory) or managed using a management table. Input and output information, signals, etc. can be overwritten, updated, or appended. Output information, signals, etc. can also be deleted. Input information, signals, etc. can also be sent to other devices.

[0615] The notification of information is not limited to the methods / implementations described in this disclosure and may also be performed using other methods. For example, the notification of information in this disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0616] In addition, physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), Layer 1 control information (L1 control signal), etc. Furthermore, RRC signaling may also be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, MAC signaling may also be notified using, for example, a MAC Control Element (CE).

[0617] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0618] The determination can be made using a value represented by a bit (0 or 1), a true or false value represented by true (true) or false (false) (Boolean value), or by comparing numerical values (for example, comparing with a specific value).

[0619] The term “software” or “firmware” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0620] Furthermore, software, instructions, information, and the like may also be transmitted and received via a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and a wireless technology (infrared, microwave, etc.), at least one of the wired technology and the wireless technology is included within the definition of a transmission medium.

[0621] The terms "system" and "network" used in this disclosure are interchangeable. "Network" may also refer to devices included in the network (eg, base stations).

[0622] In the present 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", "layer", "number of layers", "rank", "resource", "resource set", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel", "UE panel", "transmitting entity", and "receiving entity" can be used interchangeably.

[0623] Furthermore, in the present disclosure, antenna ports can be interchanged with antenna ports used for any signal / channel (e.g., Demodulation Reference Signal (DMRS) ports). In the present disclosure, resources can be interchanged with resources used for any signal / channel (e.g., reference signal resources, SRS resources, etc.). Furthermore, resources can include time / frequency / symbol / space / power resources. Furthermore, a spatial domain transmit filter can include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0624] The above-mentioned group may also include, for example, at least one of a spatial relationship group, a code division multiplexing (CDM) group, a reference signal (RS) group, a control resource set (CORESET) group, a PUCCH group, an antenna port group (for example, a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, etc.

[0625] In addition, in the present disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. can also be rewritten.

[0626] In addition, in the present disclosure, TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state (unified TCI state), common TCI state (common TCI state), joint TCI state, etc. can also be rewritten with each other.

[0627] In addition, in the present disclosure, "QCL", "QCL concept", "QCL relationship", "QCL type information", "QCL characteristics (QCLproperty / properties)", "specific QCL type (e.g., type A, type D) characteristics", "specific QCL type (e.g., type A, type D)", etc. can also be rewritten with each other.

[0628] In the present disclosure, index, identifier (ID), indicator, indication, resource ID, etc. may also be overwritten with each other. In the present disclosure, sequence, list, set, group, group, cluster, subset, etc. may also be overwritten with each other.

[0629] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and spatial relationship information (TCI state) can also be overwritten. "Spatial relationship information (TCI state)" can also be overwritten with "a collection of spatial relationship information (TCI state)," "one or more spatial relationship information," and so on. TCI states and TCIs can also be overwritten. Spatial relationship information and spatial relationships can also be overwritten.

[0630] In this disclosure, terms such as "base station (BS)", "wireless 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", and "component carrier" are used interchangeably. In some cases, a base station may be referred to as a macrocell, small cell, femtocell, or picocell.

[0631] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the base station's overall coverage area can be divided into multiple smaller areas, each of which can be provided with communications services by a base station subsystem (for example, a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or the entire coverage area of at least one of a base station and a base station subsystem providing communications services within that coverage area.

[0632] In the present disclosure, the matter of a base station sending information to a terminal may be replaced with the matter of the base station instructing the terminal to control / operate based on the information.

[0633] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (UE)”, and “terminal” can be used interchangeably.

[0634] The 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, hand set, user agent, mobile client, client, or some other appropriate terminology.

[0635] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a moving object, a moving object body, etc.

[0636] The mobile object refers to a movable object, and the moving speed can be arbitrary, including situations where the mobile object is stationary. Examples of such mobile objects include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, carts, rickshaws, ships (ships and other watercraft), airplanes, rockets, satellites, drones, multicopters, quadcopters, hot air balloons, and objects aboard such objects. Furthermore, the mobile object may also be one that moves autonomously based on operational instructions.

[0637] The mobile object may be a vehicle (e.g., a car, an aircraft, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station may include a device that does not necessarily move during communication operations. 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.

[0638] Figure 27 This figure shows an example of a vehicle according to one embodiment. 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.

[0639] The drive unit 41 is composed of, for example, at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is configured to include at least a steering wheel (also referred to as a handle), and steers at least one of the front wheels 46 and the rear wheels 47 based on the user's operation of the steering wheel.

[0640] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and communication ports (e.g., input / output (IO) ports) 63. Signals from various sensors 50-58 included in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be referred to as an electronic control unit (ECU).

[0641] As signals from various sensors 50-58, there are the following signals, etc.: a current signal from the current sensor 50 that senses the current of the motor, a speed signal of the front wheel 46 / rear wheel 47 obtained by the speed sensor 51, an air pressure signal of the front wheel 46 / rear wheel 47 obtained by the air pressure sensor 52, a vehicle speed signal obtained by the vehicle speed sensor 53, an acceleration signal obtained by the acceleration sensor 54, a stepping amount signal of the accelerator pedal 43 obtained by the accelerator pedal sensor 55, a stepping amount signal of the brake pedal 44 obtained by the brake pedal sensor 56, an operation signal of the shift lever 45 obtained by the shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 58.

[0642] Information service unit 59 is composed of various devices that provide (output) various types of information, including driving information, traffic information, and entertainment information, such as a navigation system, audio system, speakers, displays, televisions, and radios, and one or more ECUs that control these devices. Information service unit 59 uses information acquired from external devices via communication module 60 and other means to provide various information and services (e.g., multimedia information and multimedia services) to the occupants of vehicle 40.

[0643] The information service unit 59 may include input devices for accepting input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.), and may also include output devices for implementing output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[0644] The driving assistance system unit 64 is composed of various devices for providing functions for preventing accidents or reducing the driver's driving burden, such as millimeter-wave radar, light detection and ranging (LiDAR), cameras, positioning sensors (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyroscope systems (e.g., inertial measurement units (IMUs)), inertial navigation systems (INSs), etc.), artificial intelligence (AI) chips, and AI processors, and one or more ECUs that control these devices. Furthermore, the driving assistance system unit 64 transmits and receives various information via the communication module 60 to implement driving assistance functions or autonomous driving functions.

[0645] 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 with 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, axle 48, microprocessor 61 and memory (ROM, RAM) 62 within the electronic control unit 49, and various sensors 50-58 included in the vehicle 40.

[0646] The communication module 60 is controlled by the microprocessor 61 of the electronic control unit 49 and is a communication device capable of communicating with external devices. For example, various information can be transmitted and received with the external device via wireless communication. The communication module 60 can be located either inside or outside the electronic control unit 49. Examples of external devices include the aforementioned base station 10 and user terminal 20. Furthermore, the communication module 60 can also be, for example, at least one of the aforementioned base station 10 and user terminal 20 (and can function as at least one of the base station 10 and user terminal 20).

[0647] The communication module 60 may also transmit at least one of the signals input to the electronic control unit 49 from the various sensors 50-58, information obtained based on these signals, and information based on external (user) input received 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, and the like may also be referred to as input units that receive input. For example, the PUSCH transmitted by the communication module 60 may also include information based on these inputs.

[0648] The communication module 60 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from external devices and displays it on the vehicle's information service unit 59. The information service unit 59 can also be referred to as an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0649] 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 can also 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 included in the vehicle 40.

[0650] Furthermore, the base station in this disclosure can also be rewritten as a user terminal. For example, the various methods / implementations of this disclosure can also be applied to a structure in which communication between a base station and a user terminal is replaced by communication between multiple user terminals (e.g., device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, the user terminal 20 can also have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" can also be rewritten with terms corresponding to inter-terminal communication (e.g., "sidelink"). For example, uplink channels, downlink channels, etc. can also be rewritten as sidelink channels.

[0651] Likewise, the user terminal in the present disclosure may be rewritten as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0652] In this disclosure, actions are described as being performed by a base station, and sometimes, depending on circumstances, by its upper node. In a network comprising one or more network nodes including a base station, various operations for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (for example, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0653] The various methods / implementations described in this disclosure may be used individually or in combination, and may be switched between them during execution. Furthermore, the processing procedures, timings, flow charts, and the like of the various methods / implementations described in this disclosure may be reversed as long as they do not conflict. For example, the methods described in this disclosure use an illustrative order to present elements of various steps, but are not limited to the specific order presented.

[0654] The various modes and embodiments described in the present disclosure may also be applied to 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 IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems utilizing other appropriate wireless communication methods, and next-generation systems based on these that are extended, modified, generated, or specified. Furthermore, multiple systems may be combined for application (for example, LTE or LTE-A combined with 5G).

[0655] The phrase “based on” used in this disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on.”

[0656] Any reference to an element using the designations "first," "second," etc., as used in this disclosure, does not necessarily define the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to a first and a second element does not imply that only two elements may be used or that the first element must in some way take precedence over the second element.

[0657] The term "determining" as used in this disclosure may encompass a variety of operations. For example, "determining" may also include judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching a table, database, or other data structure), ascertaining, and the like as performing a "determination."

[0658] In addition, “judgment (decision)” may also refer to situations where receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc. are regarded as “judgment (decision)”.

[0659] In other words, "judgment (decision)" can also refer to situations where certain actions are considered to be "judgments (decisions)." Furthermore, "judgment (decision)" can be rewritten as "assuming," "expecting," "considering," and so on. In this disclosure, "judgment (decision)" and the aforementioned operations can be rewritten interchangeably.

[0660] In this disclosure, "determine / determining" can be interchanged with "assume / assuming," "expect / expecting," "consider / considering," and the like. Furthermore, in this disclosure, "not assuming that..." can be interchanged with "assuming that..."

[0661] In the present disclosure, "expect" and "be expected" can be interchanged. For example, "expect(s) ..." ("..." can also be expressed, for example, using the that clause, the to-infinitive, etc.) can be interchanged with "be expected ...". "Does not expect..." can also be interchanged with "Does not expect ...". Furthermore, "An apparatus A is not expected ..." can be interchanged with "An apparatus B other than apparatus A does not expect ..." (for example, when apparatus A is a UE, apparatus B can also be a base station).

[0662] The “maximum transmit power” described in this disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated maximum transmit power).

[0663] As used in this disclosure, the terms "connected," "coupled," and all variations 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 the two elements being "connected" or "coupled." The coupling or connection between elements can be physical, logical, or a combination thereof. For example, "connected" can also be rephrased as "accessed."

[0664] In the present disclosure, when two elements are connected, it is possible to consider them to be "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., and as several non-limiting and non-inclusive examples, they are "connected" or "combined" to each other using electromagnetic energy having a wavelength in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc.

[0665] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other." Alternatively, the term may also mean "A and B are each different from C." Terms such as "separate" and "bound" may also be interpreted in the same manner as "different."

[0666] When used in this disclosure, "include," "including," and variations thereof have the same inclusive meaning as the term "comprising." Furthermore, the term "or" used in this disclosure does not mean an exclusive OR.

[0667] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure may also include a case where the noun following the article is in a plural form.

[0668] In the present disclosure, “below,” “less than,” “above,” “more,” “equal to,” and the like may be replaced with each other. Furthermore, in the present disclosure, words meaning “good,” “bad,” “big,” “small,” “high,” “low,” “early,” “slow,” “wide,” “narrow,” and the like are not limited to the positive, comparative, and superlative forms, but may be replaced with each other. Furthermore, in the present disclosure, words meaning “good,” “bad,” “big,” “small,” “high,” “low,” “early,” “slow,” “wide,” “narrow,” and the like are not limited to the positive, comparative, and superlative forms, but may be replaced with each other as expressions appended with “the ith” (i is an arbitrary integer) (for example, “the highest” may be replaced with “the ith highest”).

[0669] In the present disclosure, “of,” “for,” “regarding,” “related to,” “associated with,” etc. may be replaced with each other.

[0670] In the present disclosure, expressions such as “when A, B,” “if A, (then) B,” “B upon A,” “B in response to A,” “B based on A,” “B during / while A,” “B before A,” “B at (the same time as) / on A,” “B after A,” “B since A,” and “B until A” can be replaced with each other. Furthermore, A, B, and the like here can be replaced with nouns, gerunds, or ordinary sentences, depending on the context. Furthermore, the time difference between A and B can be approximately zero (immediately after or immediately before). Furthermore, a time offset can be applied to the time when A occurs. For example, “A” can be replaced with “before / after the time offset when A occurs.” This time offset (eg, one or more symbols / time slots) may be predetermined or determined by the UE based on notified information.

[0671] In the present disclosure, timing, moment, time, time instance, arbitrary time unit (eg, time slot, sub-time slot, symbol, sub-frame), period, occasion, resource, etc. may also be interchangeable.

[0672] While the inventions disclosed herein have been described in detail above, it will be apparent to those skilled in the art that the inventions disclosed herein are not limited to the embodiments described herein. The disclosure herein is provided for illustrative purposes only and is not intended to limit the inventions disclosed herein.

Claims

1. A terminal comprising: a receiving unit, receiving a setting of a channel state information (CSI) report for coherent joint transmission; and The control unit determines, based on the setting, the number of CSI processing units occupied in the calculation of the CSI report.

2. The terminal according to claim 1, wherein: The control unit determines the number of the CSI processing units based on at least one information of the number of set channel measurement resources, the number of channel measurement resources selected for the CSI report, and the number of combinations of multiple values of a parameter related to the number of beams.

3. The terminal according to claim 1, wherein: The control unit determines the number of CSI processing units based on at least one information including the number of set channel measurement resources, the number of channel measurement resources selected for the CSI report, the number of combinations of multiple values of a parameter related to the number of beams, and the number of additional CSI processing units. The terminal according to claim 1 , wherein: The control unit controls reporting of capability information indicating a maximum number of channel measurement resources used for the CSI report.

5. A wireless communication method, which is a wireless communication method of a terminal, comprising: The step of receiving a configuration of a channel state information (CSI) report for coherent joint transmission; and The step of determining the number of CSI processing units occupied in calculating the CSI report based on the setting.

6. A base station comprising: a transmitting unit, configured to transmit a channel state information (CSI) report configuration for coherent joint transmission; and The control unit determines, based on the setting, the number of CSI processing units occupied in the calculation of the CSI report.

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