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 including bitmap parameters indicating codebook subset constraints for coherent joint transmission; and a control unit that applies the bitmap parameter to a channel state information (CSI) report on the basis of the setting, and controls the reporting of the CSI. According to one embodiment of the present disclosure, CSI can be appropriately reported.

Description

Technical Field

[0001] This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems. Background Technology

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) was standardized with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was standardized with the aim of further increasing capacity and improving upon LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9).

[0003] The development of successor systems to LTE is also underway (e.g., also known as the 5th generation mobile communication system (5G), 5G+, the 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.).

[0004] Existing technical documents

[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] The problem that the invention aims to solve

[0008] In future wireless communication systems (e.g., NR), the reporting of channel state information (CSI) based on the received reference signal is under investigation. Furthermore, CSI reporting for coherent joint transmission (CJT) using multiple TRPs is also being studied.

[0009] However, the CSI / codebook in such terminals has not been adequately studied. If such methods are not clearly defined, there are concerns about degradation in communication throughput and quality.

[0010] Therefore, one of the purposes of this disclosure is to provide terminals, wireless communication methods, and base stations for determining appropriate CSI / codebooks.

[0011] Methods for solving problems

[0012] One aspect of this disclosure relates to a terminal comprising: a receiving unit that receives settings including bitmap parameters representing constraints on a subset of codebooks for coherent joint transmission; and a control unit that, based on the settings, applies the bitmap parameters in a channel state information (CSI) report and controls the reporting of the CSI.

[0013] Invention Effects

[0014] According to one method disclosed herein, CSI can be properly reported. Attached Figure Description

[0015] Figure 1 An example of a 16-level quantification 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 a type 2PS codebook / enhanced type 2PS codebook is shown.

[0018] Figure 4A as well as Figure 4B An example of an additional enhanced type 2PS codebook is shown.

[0019] Figure 5 This shows an example of the parameter combination used in the enhanced type 2 codebook.

[0020] Figure 6 This shows an example of the parameter combination used to add an enhanced type 2PS codebook.

[0021] Figure 7 This illustrates an example of amplitude constraints in a Type 2 codebook.

[0022] Figure 8 This illustrates an example of amplitude constraints in an enhanced type 2 codebook.

[0023] Figure 9A as well as Figure 9B This shows an example of the structure for a new codebook setting (e.g., CodebookConfig-r18) for multi-TRP CSI.

[0024] Figure 10 This shows an example of the settings for CBSR activation.

[0025] Figure 11 This shows another example of the CBSR activation setting.

[0026] Figure 12 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment.

[0027] Figure 13 This is a diagram illustrating an example of the structure of a base station according to one embodiment.

[0028] Figure 14 This is a diagram illustrating an example of the structure of a user terminal according to one embodiment.

[0029] Figure 15 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment.

[0030] Figure 16 This is a diagram illustrating an example of a vehicle according to one embodiment. Detailed Implementation

[0031] (CSI report (or reporting))

[0032] In Rel.15 NR, a terminal (also known as a user terminal, user equipment (UE), etc.) generates (also known as determining, calculating, estimating, measuring, etc.) Channel State Information (CSI) based on a Reference Signal (RS) (or the resources used by that RS), and sends the generated CSI to the network (e.g., a base station) (also known as reporting, feedback, etc.). This CSI may also be sent 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)).

[0033] The RS used in the generation of CSI can be, for example, at least one of the following: Channel State Information Reference Signal (CSI-RS), Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, Synchronization Signal (SS), Demodulation Reference Signal (DMRS)).

[0034] CSI-RS can also include at least one of Non-Zero Power (NZP) CSI-RS and CSI-Interference Management (CSI-Interference Measurement, CSI-IM). An SS / PBCH block is a block containing SS and PBCH (and their corresponding DMRS), and can also be called an SS block (SSB), etc. Furthermore, SS can also include at least one of Primary Synchronization Signal (PSS) and Secondary Synchronization Signal (SSS).

[0035] Additionally, CSI may include at least one of the following: Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SS / PBCH Block Resource Indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), and L1-SNR (Signal to Noise Ratio).

[0036] The UE can also receive information related to CSI reports (report configuration information) and control CSI reporting based on this report configuration information. This report configuration information can be, for example, the "CSI-ReportConfig" of the Radio Resource Control (RRC) Information Element (IE). Furthermore, in this disclosure, the RRC IE can also be interleaved with RRC parameters, higher-layer parameters, etc.

[0037] The report configuration information (e.g., “CSI-ReportConfig” in RRC IE) may also include at least one of the following.

[0038] • Information related to the type of CSI report (report type information, for example, "reportConfigType" in RRC IE);

[0039] • Information related to one or more quantities (quantities) of the CSI that should be reported (more than one CSI parameter) (report quantity information, e.g., “reportQuantity” in RRC IE);

[0040] • Information related to the RS resources used in the generation of this quantity (the CSI parameter) (resource information, such as “CSI-ResourceConfigId” in RRC IE);

[0041] • Information related to the frequency domain of the object that becomes a CSI report (frequency domain information, such as “reportFreqConfiguration” in RRC IE).

[0042] For example, report type information can also indicate periodic CSI (P-CSI) reports, aperiodic CSI (A-CSI) reports, or semi-permanent CSI (SP-CSI) reports.

[0043] In addition, the reporting volume information can also specify a combination of at least one of the above CSI parameters (e.g., CRI, RI, PMI, CQI, LI, L1-RSRP, etc.).

[0044] In addition, resource information can also be the ID of an RS resource. This RS resource may, for example, include a non-zero power CSI-RS resource or SSB, and a CSI-IM resource (e.g., a zero power CSI-RS resource).

[0045] Furthermore, frequency domain information can also represent the frequency granularity of CSI reports. This frequency granularity can include, for example, bandwidth and subbands. Bandwidth is the entire CSI reporting band. Bandwidth can be either the entirety of a certain carrier (component carrier (CC)), cell, serving cell) or the entirety of the bandwidth part (BWP) within a carrier. Bandwidth can also be referred to as the CSI reporting band, the entire CSI reporting band, etc.

[0046] Furthermore, a subband is a part of the bandwidth and can consist of more than one resource block (RB) or physical resource block (PRB). The size of a subband can also be determined based on the size of the bandwidth plan (number of PRBs).

[0047] Frequency domain information can also indicate which PMI is being reported, wideband or subband (frequency domain information may also include, for example, the "pmi-FormatIndicator" of the RRC IE used to determine either wideband PMI reporting or subband PMI reporting). The UE can also determine the frequency granularity of the CSI report (i.e., either wideband PMI reporting or subband PMI reporting) based on at least one of the above reporting quantity information and frequency domain information.

[0048] When a wideband PMI report is set (determined), a single wideband PMI can be reported for the entire CSI report band domain. On the other hand, when a subband PMI report is set, a single wideband indication i1 can be reported for the entire CSI report band domain, and one subband indication i2 (e.g., subband indications of each subband) of each of more than one subband within that CSI report domain can be reported.

[0049] The UE uses the received RS to perform channel estimation and estimates the channel matrix H. The UE then feeds back an index (PMI) determined based on the estimated channel matrix.

[0050] PMI can also represent a precoder matrix (or simply precoder) that the UE considers suitable for use in downlink (DL) transmission for the UE. Each value of PMI can also correspond to a precoder matrix. The set of PMI values ​​can also correspond to a set of different precoder matrices called a precoder codebook (or simply codebook).

[0051] In the space domain, a CSI report may contain more than one type of CSI. For example, the CSI may include at least one of a first type (Type 1 CSI) used in single-beam selection and a second type (Type 2 CSI) used in multi-beam selection. Single-beam may also be referred to as a single layer, and multi-beam may be referred to as multiple beams. Furthermore, Type 1 CSI may not assume multiple-user multiple-input multiple-output (MU-MIMO), while Type 2 CSI may assume multiple-user MIMO.

[0052] The codebook mentioned above may also include a codebook for Type 1 CSI (also known as Type 1 codebook, etc.) and a codebook for Type 2 CSI (also known as Type 2 codebook, etc.). In addition, Type 1 CSI may also include Type 1 single-panel CSI and Type 1 multi-panel CSI, and different codebooks (Type 1 single-panel codebook, Type 1 multi-panel codebook) may be specified for each.

[0053] In this disclosure, Type 1 and Type I can also be rewritten as each other. In this disclosure, Type 2 and Type II can also be rewritten as each other.

[0054] The uplink control information (UCI) type may also include at least one of the following: Hybrid Automatic Repeat reQuest ACK knowledgement (HARQ-ACK), scheduling request (SR), or CSI. The UCI can be carried by either the PUCCH or the PUSCH.

[0055] In Rel.15 NR, UCI can include a CSI section for broadband PMI feedback. CSI reports #n include PMI broadband information when reported.

[0056] In Rel.15 NR, the UCI can include two CSI parts for subband PMI feedback. CSI part 1 contains wideband PMI information. CSI part 2 contains one wideband PMI piece and several subband PMI pieces. CSI part 1 and CSI part 2 are encoded independently.

[0057] In Rel.15 NR, the UE is configured with N (N≥1) CSI report settings and M (M≥1) CSI resource settings by higher layers. For example, the CSI report settings (CSI-ReportConfig) include resource settings for channel measurement (resourcesForChannelMeasurement), CSI-IM resource settings for interference (csi-IM-ResourceForInterference), NZP-CSI-RS settings for interference (nzp-CSI-RS-ResourceForInterference), and report quantity. The channel measurement resource settings, CSI-IM resource settings for interference, and NZP-CSI-RS settings for interference are associated with CSI resource settings (CSI-ResourceConfig, CSI-ResourceConfigId), respectively. The CSI resource settings contain a list of CSI-RS resource sets (csi-RS-ResourceSetList, e.g., NZP-CSI-RS resource set or CSI-IM resource set).

[0058] In order to achieve more dynamic channel / interference assumptions for NCJT using FR1 and FR2 as targets, the evaluation and specification of CSI reports for transmission of at least one of the multiple TRPs and multiple panels in DL are being studied.

[0059] (Codebook settings)

[0060] The UE sets parameters related to the codebook (CB) via higher-layer signaling (RRC signaling) (Codebook Configuration). The codebook configuration is contained in the CSI report configuration of the higher-layer (RRC) parameters (CSI-Report Configuration).

[0061] In the codebook settings, select at least one codebook from multiple codebooks that include type I SinglePanel, type I MultiPanel, type II, and type II PortSelection.

[0062] The codebook parameters include parameters related to the codebook subset restriction (CBSR) ("...Restriction" within CodebookConfig). The CBSR setting indicates which PMI reporting bits ("1") and which PMI reporting bits ("0") are allowed or disallowed for the precoder associated with the CBSR bits. One bit of the CBSR bitmap corresponds to one codebook index / antenna port.

[0063] (CSI report settings)

[0064] In addition to the codebook configuration, the Rel.16 CSI report configuration (CSI-ReportConfig) includes CSI-RS resources for channel measurement (resourcesForChannelMeasurement (CMR)) and CSI-RS resources for interference measurement (csi-IM-ResourcesForInterference (ZP-IMR), nzp-CSI-RS-ResourcesForInterference (NZP-IMR)). Parameters in CSI-ReportConfig other than codebookConfig-r16 are also included in the Rel.15 CSI report configuration.

[0065] In Rel. 17, an enhanced CSI report configuration (CSI-ReportConfig) for CSI measurements / reporting using NCJT is being investigated. This CSI report configuration sets two CMR groups corresponding to each of the two TRPs. The CMRs within a CMR group can also be used for measurements of at least one of the multi-TRP and 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 CMR pairs for single-TRP measurements.

[0066] For CSI reports associated with NCJT measurements of multiple TRPs / panels that are set up through a single CSI report setting, support for at least one of the following options 1 and 2 is being investigated.

[0067] <Option 1>

[0068] The UE is configured to report X (X=0, 1, 2) CSIs associated with single TRP measurement hypotheses and one CSI associated with an NCJT measurement. In the case of X=2, the two CSIs are associated with two different single TRP measurements using different CMR groups.

[0069] <Option 2>

[0070] The UE can also be configured to report a CSI associated with the best measurement result for NCJT and single TRP measurement assumptions.

[0071] As mentioned above, in Rel.15 / 16, the CBSR is set for each codebook setting in each CSI report setting. That is, the CBSR is applied to all CMRs, etc., within the corresponding CSI report setting.

[0072] However, in the CSI report settings for multi-TRP based on CSI report settings in Rel.17, when options 1 and 2 above are applied, it is possible to perform the following measurement settings.

[0073] Option 1 (X=0): Measurement of CSI for NCJT only.

[0074] Option 1 (X=1): Measurement of CSI for NCJT and CSI for a single TRP (one TRP).

[0075] Option 1 (X=2): Measurement of CSI for NCJT and CSI for a single TRP (two TRPs).

[0076] Option 2: Measurement of both NCJT CSI and single TRP CSI.

[0077] Multiple subbands for CSI report #n, indicated and provided by the high-level parameter csi-ReportingBand, can also include the lowest subband of csi-ReportingBand as subband 0, and are assigned sequentially in ascending order.

[0078] (Type 1 codebook)

[0079] For base station panels, Type 1 single-panel codebooks and Type 1 multi-panel codebooks are defined as Type 1 codebooks (Rel. 15). In a Type 1 single-panel panel, for (N1, N2), the antenna model for the CSI antenna port array (logically defined) is specified. The number of CSI-RS antenna ports P... CSI-RS It is 2N1N2. In a type 1 multi-panel setup, for the number of CSI-RS antenna ports P CSI-RS and (N) gThe antenna model (logically defined) is defined by N1, N2, etc., which represents the CSI antenna port array.

[0080] For Rel.15 Type 1 Single-Panel CSI, the UE sets the higher-level parameter of the codebook type (the subType within type1 in codebookType within CodebookConfig) to Type 1 Single-Panel ('typeI-SinglePanel'). In cases where the layer number v ∈ {2,3,4} is not present, the PMI value corresponds to the three codebook indices i. 1,1 i 1,2 ,i2. When the layer number v∈{2,3,4}, the PMI value corresponds to one of the four codebook indices i. 1,1 i 1,2 i 1,3 ,i2. In the case where the layer number v∈{2,3,4} is not, the composite codebook index i1=[i 1,1 i 1,2 In the case of layer number 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 the bandwidth. i2 = n can also be an index for the subband / phase.

[0081] For P CSI-RS The specification defines supported settings (combinations of values) for (N1, N2) and (O1, O2). (N1, N2) represent the number of two-dimensional (2D) antenna elements, set by the higher-level parameters n1-n2 within moreThanTwo in nrOfAntennaPorts within typeI-SinglePanel. n1-n2 are bitmap parameters of N1O1N2O2 bits. (O1, O2) are the 2D oversampling factors.

[0082] In a codebook for a Level 1 CSI report and with codebookMode = 1, the index i corresponding to the horizontal beam... 1,1 =l=0,1,...,N1O1-1, the index i corresponding to the beam in the vertical direction. 1,2 =m=0,1,...,N2O2-1,i2=n=0,1,2,3,Use antenna ports 3000 to 2999+P CSI-RS The matrix used in the Level 1 CSI report codebook is W_i 1,1 i 1,2 ,i2^(1). Here, W l,m,n （1） Provided by the following formula.

[0083]

[0084] Here, v l,m It is the element (SD basis) of the 2D-SD (DFT) basis vector (matrix, exp(j2πln1 / O1N1)×exp(j2πmn2 / O2N2), n1=0,1,...,N1-1, n2=0,1,...,N2-1) in N1 rows and N2 columns. Phase matching (co-phasing) φ between polarizations (horizontal and vertical polarizations). n =exp(jπn / 2), which represents the phase of the polarization of the other side relative to the phase of the polarization of one side.

[0085] For Rel.15 Type 1 multi-panel CSI, compared to Type 1 single-panel, in addition to N1 and N2, the number of panels N is also set. g As inter-panel phase matching (inter-panel co-phasing, inter-panel phase compensation), i is added. 1,4 And thus reported. For each panel, the same SD beam (precoding matrix W) is selected. l Only inter-pane phase matching is reported.

[0086] For P CSI-RS The specification defines the supported (N) g The settings (combinations of values) for (N1, N2) and (O1, O2) are used. (N1, N2) are set via ng-n1-n2 within typeI-MultiPanel. 1,1 It is {0,1,...,N1O1-1}. 1,2 It is {0,1,...,N₂O₂⁻¹}. For q=1,...,N g -1, i 1,4,q i1 is {0, 1, 2, 3}. i2 is {0, 1, 2, 3}. For codebook mode = 1, use antenna ports 3000 to 2999+P. CSI-RS The matrix used in the Level 1 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.

[0087] For N g ={2,4} of W_l,m,p,n^1,Ng ,1 and W_l,m,p,n^2,N g ,1 (for the first layer, N) g =2, matrix W with codeBookMode=1 l,m,p,n 1,2,1 For the second layer, N g =2, matrix W with codeBookMode=1 l,m,p,n 2,2,1 For the first layer, N g =4, matrix W with codeBookMode=1 l,m,p,n 1,4,1 And for the second layer, N g =4, matrix W with codeBookMode=1 l,m,p,n 2,4,1 () is provided by the following formula.

[0088]

[0089] 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 phase matching between panels. The same beams (SD beam matrix, precoding matrix W) are selected for panels 0, 1, 2, and 3. l φ_p1 represents phase compensation for panel 1 of panel 0, φ_p2 represents phase compensation for panel 2 of panel 0, and φ_p3 represents phase compensation for panel 3 of panel 0.

[0090] (Type 2 codebook)

[0091] In this disclosure, a matrix Z with X rows and Y columns is sometimes represented as Z(X×Y).

[0092] For Rel.15 type 2CSI, the precoding vector for each subband (SB-wise) of the provided layer l is generated based on the following formula.

[0093] W l (N) t ×N3) = W1W 2,l (F1)

[0094] N t N is the number of antennas / antenna ports. N3 is the total number (subbands) of precoding (beamforming) matrices (precoders) represented by PMI.

[0095] W1(N) t×2L) represents L ∈ {2,4} (oversampled) spatial domain (SD) vectors (SD2D-DFT vectors, SD beams, SD matrices). L is the number of beams. Considering both horizontal and vertical polarization at point 1, the actual number of beams is 2L. For example, L = 2 SD 2D-DFT vectors are b... i ,b j .

[0096] 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 This indicates beam selection and phase matching (co-phasing) between two polarizations. For example, two W... 2,l They are c i ,c j For example, the channel vector h is obtained through a linear combination c of L = 2 SD 2D-DFT vectors. i b i ,+c j b j This can be approximated. The overhead of feedback mainly stems from the LC coefficient matrix W. 2,l Furthermore, Rel.15's Type 2CSI only supports rank 1 and rank 2.

[0097] In Type 2 CSI, a channel (channel matrix) for a given user is represented by a linear combination of two polarizations and L beams (L SD2D-DFT vectors). Type 2 CSI Rel.15 supports rank 1 and rank 2.

[0098] (Enhanced Type 2 Codebook (Rel.16))

[0099] Rel.16's Type 2 CSI (enhanced Type 2 codebook) reduces the frequency response to W through frequency domain (FD) compression. 2,l Associated overhead. In addition to rank 1 and 2, Rel.16 type 2CSI also supports rank 3 and 4.

[0100] In Type 2CSI of Rel.16, for the provided layer l, information based on the following formula can also be reported by the UE.

[0101] W l = W1W ~ l W f,l H (F2)

[0102] W 2,l Through W ~ l W f,l H To approximate the representation. Matrix W ~ It can also be represented by a tilde (~) on top of the W. ~ l It can also be represented as W ~ 2,l Matrix W f,l H It is W f,l The adjoint matrix can be obtained through W. f,l It is obtained by the conjugate transpose of .

[0103] For CSI reporting, the UE can also be configured with one of two subband sizes. This subband (CQI subband) can also be defined as N. PRB SB The number of consecutive PRBs can also depend on the total number of PRBs within the BWP. The number R of PMI subbands per CQI subband is set via RRC IE (numberOfPMI-SubbandsPerCQI-Subband). For R, the total number N3 of the precoding matrices represented by PMIs is controlled as a function of the number of subbands set within the csi-ReportingBand, the subband size set via subbandSize, and the total number of PRBs within the BWP.

[0104] W1(N) t (×2L) is a matrix of multiple (oversampled) SD 2D-DFT vectors. To represent this matrix, multiple indices of the SD 2D-DFT vectors and a two-dimensional oversampling factor are reported. The spatial domain response / distribution represented by the SD 2D-DFT vectors can also be referred to as SD beaming.

[0105] W ~ l (2L×M) v The matrix is ​​composed of LC coefficients. To represent this matrix, the largest K0 non-zero coefficients (NZCs) and LC coefficients with non-zero amplitudes are reported. The report consists of a bitmap capturing the NZC positions and quantized NZCs.

[0106] W f,l (N3×M) v ) refers to layer l, by M vA matrix consisting of N3 vectors (frequency domain (FD) bases vectors), each containing N3 FD bases. N3 is the total number of precoding (beamforming) matrices (precoders) represented by PMI as a function of the number of subbands defined within the csi-ReportingBand. The csi-ReportingBand represents the continuous or discontinuous subbands within a BWP when reporting CSI for that BWP. M are present per layer. v FD basis (FD DFT basis) vectors. In the case where N3 > 19, from the intermediate subset (InS) of size N3' (< N3), M... v One FD basis is selected. In the case of N3 ≤ 19, log2(C(N3-1, M)) is reported. v -1) bits. Here, C(N3-1,M) v -1) indicates that M is selected from N3-1 options. v The number of combinations of -1 (combinatorial coefficient C(x,y)) is also known as binomial coefficients.

[0107] The frequency response / distribution (frequency response) represented by a linear combination of FD basis vectors and LC coefficients can also be called an FD beam. FD beams can also correspond to a delay distribution (time response).

[0108] The PMI subband size is provided by the CQI subband size / R, where R ∈ {1, 2}. The number M of the FD basis vectors for the provided rank v is... v By ceil (p v The number of FD bases is provided (×N3 / R). The number of FD bases is the same for all layers l∈{1,2,3,4}. v It is set through high-level settings.

[0109] Multiple precoding matrices represented by PMI are based on L+M v The vectors are used to determine the outcome.

[0110] For the elements (SD basis) v of the L SD basis vectors with beam indices i = 0, 1, ..., L-1 m_1^（i）,m_2^（i） It is identified by q1, q2, n1, n2, and by i 1,1 i 1,2 express.

[0111] M v The FD basis vectors pass through 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.

[0112] The elements (FD basis) of the FD basis vectors associated with the precoding matrix (subband) at indices t = 0, 1, ..., N3-1 and layers l = 1, ..., v are y. t,l （f） =exp(j2πtn) 3,l （f） / N3). In M v In the FD basis vectors, the indices f = 0, 1, ..., M associated with the FD basis vectors are... v The FD basis vector of -1 is [y 0,l （f） ,y 1,l （f） ,...,y N_3-1,l （f） ] T .

[0113] Matrix W 2,l Each row represents the channel frequency response of a specific SD beam. When the SD beam has high directivity, the channel taps for each beam are limited (the power delay distribution becomes sparse in the time domain). As a result, the channel frequency response for each SD beam has high correlation (approximately flat in the frequency domain). In this case, the channel frequency response can be approximated by a linear combination of a relatively small number of FD basis vectors. For example, in M... v When = 2, use the FD basis vectors f2, f q and LC coefficient d1 0 ,d2 0 The frequency response associated with SD beam b0 is provided by d1. 0 f2+,d2 0 f q Approximate representation.

[0114] Choose the dominant M v FD basis vectors. Let M be the basis vectors. v ≪N3, W ~ l Expenses and W 2,l Compared to other expenses, it is quite small. vAll or a portion of the FD basis vectors are used to approximate the frequency response of each SD beam. A bitmap is used to report only the FD basis vectors selected for each SD beam. If no bitmap is reported, all FD basis vectors are selected for each SD beam. In this case, the NZC of all FD basis vectors is reported for each SD beam. The number of NZCs K within a layer. l NZ ≤K0=ceil(β×2LM v ), NZC number K across all layers NZ ≤2K0=ceil(β×2LM v β is set at higher levels.

[0115] In the enhanced type 2 codebook of Rel.16, L, β, p v The value of (codebook parameter combination, parameter combination) is determined by the higher-level parameter paramCombination-r16 (codebook combination setting).

[0116] Type 2 CSI feedback on the PUSCH in Rel.16 consists of two parts. CSI Part 1 has a fixed payload size and is used to identify the number of information bits within 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 within 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.

[0117] In the Enhancement Type 2 CSI feedback in Rel. 16, CSI Part 1 contains the RI (if reported), CQI, and an indicator of the total number of non-zero amplitude coefficients across multiple layers for Enhancement Type 2 CSI. The RI (if reported), CQI, and the indicator of the total number of non-zero amplitude coefficients across multiple layers, which are fields of Part 1, are encoded separately. CSI Part 2 contains the Enhancement Type 2 CSI PMI. Parts 1 and 2 are encoded separately. CSI Part 2 (PMI) contains the oversampling factor, the index of the SD (2D-DFT) basis, and the index M of the initial FD (DFT) basis vector (starting offset) of the selected DFT window. initial The selected FD substrate for each layer, the NZC (amplitude and phase) for each layer, the strongest coefficient indicator (SCI) for each layer, and the amplitude of the strongest coefficient for each layer / per polarization, are at least one of the following:

[0118] For the l-th layer, the following can also be followed for multiple PMI indices (PMI values, codebook indices) associated with different CSI Part 2 information.

[0119] ·i 1,1 : Two-dimensional oversampling factor [q1 q2]. q1∈{0,1,...,O1-1}, q2∈{0,1,...,O2-1}.

[0120] ·i 1,2 : Multiple indices of the SD 2D-DFT substrate (SD beam). i 1,2 ∈{0,1,...,C(N1N2,L)-1}.

[0121] ·i 1,5 : Codebook indicator. The index of the FD DFT base of the selected DFT window. 1,5 ∈{0,1,...,2M v -1}.

[0122] ·i 1,6,l : Codebook indicator. For the FD DFT basis selected for the l-th layer. When 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}.

[0123] ·i 1,7,l : This refers to the bitmap indicator for the l-th layer. The non-zero bits within this bitmap identify i. 2,4,l and i 2,5,l Which coefficient within is reported? 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}.

[0124] ·i 1,8,l : The strongest coefficient indicator for the l-th layer (the largest element k within the amplitude coefficient indicator) l,i,f （2） ).

[0125] ·i2,3,l : An amplitude coefficient indicator for the polarization coefficient (broadband) of the l-th layer. 2,3,l =[k l,0 （1） k l,1 （1） ].

[0126] ·i 2,4,l : An amplitude coefficient indicator for the reported coefficients (subband) of the l-th layer. 2,3,l =[k l,0 （2） ...k l,M_v-1 （2） ].

[0127] ·i 2,5,l : Phase coefficient indicator for the reported coefficients (subband) of the l-th layer. 2,5,l =[c l,0,f ...c l,M_v-1,f ].

[0128] f l * ∈{0,1,...,M v -1} is set as i 2,4,l The index of i l * Let k be the integer ∈{0,1,...,2L-1}. l,f_l^* （2） The index of f. l * and i l * Identify the strongest coefficients for layer l = 1, ..., v, i.e., the i-th coefficient for layer l. 2,4,l element k l,i_l^*,f_l^* （2） Codebook index n 3,l Regarding n 3,l （f_l^*） Remapped to n 3,l （f） = (n 3,l （f） -n 3,l （f_l^*） ) mod N3, becomes n after remapping. 3,l （f_l^*） = 0. Index f with respect to f l * Remapped to f = (ff l * ) mod M v After remapping, it becomes f l* =0 (l=1,...,v). i 2,4,l i 2,5,l and i 1,7,l These represent the remapped amplitude coefficient, phase coefficient, and bitmap, respectively. (Using i...) 1,8,l The strongest coefficient of layer l, which is identified in ∈{0,1,...,2L-1}, is provided as i for v=1. 1,8,l =Σ i＝0 i_1^* k l,i,0 （3） -1, for 1 < v ≤ 4, is provided as i 1,8,l =i l * .

[0129] W ~ l The reported LC coefficients (complex coefficients) are the amplitude and phase of the separately quantized values.

[0130] - Amplitude quantization

[0131] Polarization-specific reference amplitude is used Figure 1 The table (amplitude coefficient indicator i) 2,3,l Mapping of elements within: Amplitude coefficient indicator element k l,p （1） To the amplitude coefficient p l,p （1） The 16-level quantization of the mapping. According to the 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 used... Figure 2 The table (amplitude coefficient indicator i) 2,4,l Mapping of elements within: Amplitude coefficient indicator element k l,i,f （2） To the amplitude coefficient p l,i,f （2） The mapping of p is quantized at level 8. According to the table, p l （2） =[p l,0 （2） ... p l,M_v-1 （2） ]、p l,f （2） =[pl,0,f （2） ... p l,2L-1.f （2） ] Quantized to k l,f （2） =[k l,0,f （2） ... k l,2L-1.f （2） ]、k l,i,f （2） ∈{0,...,7}.

[0132] - Phase quantization

[0133] Amplitude coefficient indicator i 2,5,l The elements within (amplitude coefficient indicator elements) [c l,0 ... c l,M_v-1 Reported via UE (using 4 bits). All phase coefficients are quantized using 16-PSK. The quantity φ used for phase matching. l,i,f = exp(j2πc l,i,f The phase coefficient in / 16) is quantized as c l,f =[c l,0,f ... c l,2L-1.f ]、c l,i,fi ∈{0,...,15}.

[0134] The amplitude coefficient indicator element k corresponding to the strongest coefficient of layer l l,floor（i_l^* / L） （1） =15 (maximum value), amplitude coefficient indicator element k l,i_l^*,0 （2） =7 (maximum value), 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.

[0135] i 1,5 and i 1,6,l This is the PMI index used in the FD DFT base report. Only when N3 > 19, i 1,5 Reported.

[0136] From using 3000 to 2999+P CSI-RS The matrix W represented by the codebook used in the CSI reports of layers v (=1 to 4) （v） Based on the matrix W for layer l (=1 to v) expressed by the following equation l .

[0137]

[0138] Here, beam indices 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） Indicates the SD 2D-DFT substrate, p l,0 （1） p l,i,f （2） φ represents the amplitude coefficient. l,i,f This represents the phase coefficient. Thus, the codebook for each layer contains the strongest coefficient for each polarization, the amplitude coefficient for each polarization per FD-DFT substrate per SD-DFT substrate, and the phase coefficient for each polarization per FD-DFT substrate per SD-DFT substrate.

[0139] As part of CSI Part 2 grouping, PMI information is grouped into three groups (Groups 0 to 2) for the provided CSI reports. This is important in cases of CSI omission. Index i 2,4,l i 2,5,l i 1,7,l Each reported element is associated with a specific priority rule. Groups 0 to 2 follow the following.

[0140] Group 0: Index i 1,1 i 1,2 i 1,8,l (l = 1, ..., v);

[0141] Group 1: (In the case of being reported) Index i 1,5 Index i (in the case of being 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 (superior) ceil (K) within NZ / 2) - v priority elements, i 2,5,l The highest (superior) ceil (K) within NZ / 2) - v priority elements (l = 1, ..., v);

[0142] ·Group 2:i 1,7,l The lowest (lower) floor (K) within NZ / 2) priority elements, i 2,4,l The lowest (lower) floor (K) within NZ / 2) priority elements, i 2,5,l The lowest (lower) floor (K) within NZ / 2) priority elements (l=1,...,v).

[0143] In Type 1 CSI, the SD beams, represented by SD DFT vectors, are transmitted towards the UE. In Type 2 CSI, L SD beams are linearly combined and transmitted towards the UE. Each SD beam can be associated with multiple FD beams. For a given SD beam, the channel frequency response can be obtained based on the linear combination of their FD basis vectors. The channel frequency response corresponds to the power delay distribution.

[0144] (Type 2 Port Selection Codebook / Enhancement (Rel.16) / Append Enhancement (Rel.17))

[0145] - Type 2 Port Selection Codebook

[0146] In Rel.15's Type 2 Port Selection (PS) CSI (Type 2 PS Codebook), the UE does not need to consider 2D-DFT to derive the SD beam as in Type 2 CSI. The base station considers the set of SD beams and uses K beam-shaped CSI-RS ports to transmit CSI-RS. The UE selects / discriminates the best L (≤K) CSI-RS ports for each polarization, reporting their indices within W1. Rel.15's Type 2 PS CSI supports rank 1 and 2.

[0147] - Enhanced Type 2 Port Selection Codebook

[0148] The operation of Rel.16's Type 2PS CSI (enhanced Type 2PS codebook) is the same as Rel.16's Type 2CSI, except for the selection of the SD beam. Rel.15's Type 2PS CSI supports ranks 1 to 4.

[0149] For layer l∈{1,2,3,4}, the precoder generation for each subband (SB)-wise is provided by the following formula.

[0150] W l (N) t ×N3) = QW1W ~ l W f,l H(H1)

[0151] Here, Q(N) t (×K) represents the K SD beams used for CSI-RS beamforming. W1 (K×2L) is the block diagonal matrix. ~ l (2L×M) is the LC coefficient matrix. W f,l (N³×M) is a matrix consisting of M vectors (FD basis vectors), each containing N³ FD basis vectors. K is set at a higher level. L is set at a higher level. P CSI-RS ∈{4,8,12,16,24,32}. In P CSI-RS When L > 4, L ∈ {2, 3, 4}.

[0152] In Rel.15 / 16 type 2PS CSI, each CSI-RS port #i is connected to the SD beam (b) i To associate () Figure 3A as well as Figure 3B ).

[0153] Type 2 PS CSI in Rel.16 is similar to Type 2 CSI in Rel.16 by changing the number of FD basis vectors from N3 to M. v Cut (M) v ≪N3), thus reducing overhead compared to type 2PS CSI of Rel.15.

[0154] - Added enhanced type 2 port selection codebook

[0155] In Rel.17 type 2PS CSI / codebook (additional enhancement, further enhanced type 2PS codebook), each CSI-RS port #i replaces the SD beam and is paired with the SD-FD beam (SD beam b). i and FD beam f i,j Associating pairs (j is the frequency index) ( Figure 4A as well as Figure 4B In this example, ports 3 and 4 are associated with the same SD beam and with different FD beams.

[0156] By using delay pre-compensation, the frequency selectivity of the channel frequency response observed in the UE based on the SD beam-FD beam pair can be reduced compared to the frequency selectivity of the channel frequency response observed in the UE based on the SD beam.

[0157] The primary scenario for Rel.17 type 2PS codebooks is FDD. Channel reciprocity based on SRS measurements is imperfect (the angles of the UL and DL beams may differ, the UL and DL frequencies may differ in FDD, and the effective antenna spacing may differ between the UL and DL frequencies). However, the base station can obtain / select several pieces of information (dominant angles and delays (SD and FD beams)). In addition to CSI reports, SRS measurements in the base station are used, allowing the base station to obtain CSI for decisions regarding the DL MIMO precoder. In this case, several CSI reports can be omitted to reduce CSI overhead.

[0158] Figure 5 This shows an example of the parameter combination used in a Rel.16 type 2 codebook. L is the number of SD basis vectors. p v M is the number of FD basis vectors for rank v. v =ceil(p v The parameter for calculating (×N3 / R). B is the parameter used for calculating the maximum number of NZCs.

[0159] In the Rel.17 additional enhancement type 2PS codebook, the values ​​of α, M, β (combination of codebook parameters, parameter combination) are determined by the higher-level parameter paramCombination-r17 (codebook parameter setting). Figure 6 This illustrates an example of the parameter combination used in the additional enhancement type 2 PS codebook of Rel.17. α is the number of selected CSI-RS ports within the PS codebook, K1 = αP. CSI-RS The parameters for calculation are: M is the number of FD basis vectors; B is the parameter for calculating the maximum number of NZCs. The precoding matrix represented by PMI is determined based on L + M vectors. Here, L = K1 / 2, K1 = αP. CSI-RS .

[0160] In the additional enhancement type 2PS CSI of Rel.17, each CSI-RS port is beamshaped using SD beams and FD basis vectors. Each port is associated with an SD-FD pair.

[0161] For the provided layer l, the UE can also report information based on the following formula.

[0162] W l (K×N3) = W1W ~ l W f,l H (H2)

[0163] For W1 (K×2L), each matrix block consists of L columns of a K×K identity matrix. The base station transmits K beamformed CSI-RS ports. Each port is associated with an SD-FD pair. The UE selects L ports from the K and uses them as PMI (W 1,l Part of it reports to the base station. Additionally, in Rel.16, each port is associated with the SD beam.

[0164] W ~ l (2L×M) v The matrix is ​​composed of binding coefficients (subband complex LC coefficients). It reports a maximum of K0 NZCs. The report consists of a bitmap capturing the NZC positions and the quantized NZCs.

[0165] In the additional enhancement type 2PS CSI of Rel.17, K l NZ =Σ i＝0 k1-1 Σ f＝0 M-1 k l,i,f （3） ≤K0 is the number of non-zero coefficients in the layers l=1,...,v, K NZ =Σ l＝1 v K l NZ ≤2K0 is the total number of non-zero coefficients. In the case where v≤2 and K NZ In the case of K1Mv, for layer l=1,...,v, i 1,7,l The bitmap indicator for the l-th layer is not reported. That is, the total number of reported NZCs is equal to the maximum number of K1Mv, and when v≤2, the reporting of the bitmap indicating the location of NZCs is omitted. In addition, in Rel.16, the bitmap of NZC location is always reported.

[0166] W f,l (N3×M) v ) is for each layer consisting of M v (M) v A matrix consisting of 1 or 2 FD basis vectors. Each vector contains N³ FD basis vectors (FD-DFT basis). The base station can also delete W. f,l In M v When W = 1, f,l When set to OFF, the added FD basis vectors are not reported. In M v When W = 2, f,l To enable (ON), M v An additional FD basis vector is reported. In Mv When W = 2, the window size N ∈ {2, 4} of the FD basis is set by the higher-level parameter (valueOfN). Additionally, in Rel.16, W... f,l It is always reported.

[0167] (JT)

[0168] Joint transmission (JT) can also refer to the simultaneous transmission of data from multiple points (e.g., TRPs) to a single UE.

[0169] In Rel. 17, non-coherent joint transmission (NCJT) from two TRPs is supported. PDSCH from the two TRPs can also be precoded and decoded independently. Frequency resources can be non-overlapping, partially-overlapping, or fully-overlapping. In the case of overlap, PDSCH from one TRP becomes interference to PDSCH from the other TRPs.

[0170] In Rel.18, support for coherent joint transmission (CJT, mTRP CJT) using up to four TRPs is being investigated. Data from the four TRPs can also be coherently precoded and transmitted to the UE on the same time-frequency resources. For example, considering channels from four TRPs, the same precoding matrix can also be used. "Coherent" can also mean that there is a certain relationship between the phases of multiple received signals. 4TRP joint precoding can also be used to improve signal quality, and there can be no interference between the four TRPs. Data can also be affected only by interference outside the four TRPs.

[0171] (NCJT CSI)

[0172] In Rel.17, the scenario in which NCJT CSI reporting can be applied is a single-DCI-based MTRP NCJT with a Type 1 single-panel codebook. For NCJT CSI measurements, within a single CSI-ReportConfig, two CMR groups can be configured, each accompanying a channel measurement resource (CMR) from a TRP. A CSI reporting mode can be configured from both modes.

[0173] The CSI-ReportConfig setting for Rel.17 non-coherent joint transmission (NCJT) CSI uses RRC signaling to configure CMR and CSI reporting modes (csi-ReportMode).

[0174] Accompanying K set by UE s =K1 + K2 CMRs in two CMR groups. 2 ≤ K s ≤8. K s Each CMR corresponds to an NZP-CSI-RS resource set used for channel measurement. K1 and K2 are the number of CMRs within the two CMR groups, respectively. N (N groups) of CMR pairs (resource pairs) are configured by the higher layer through selection from all possible pairs. Supports N=1, K... s =2. Supports N max =2 is an optional feature of the UE. K is supported. S,max =X is an optional feature for the UE. Each CMR can include a maximum of 32 CSI-RS ports, depending on the UE's capabilities. Each CMR is associated with a CRI value.

[0175] The bitmap based on RRC signaling represents N (N=1,2) CMR pairs actually used for NCJT measurement by representing one CMR from each CMR group. The UE uses the CMRs within two CMR groups to measure the single TRP CSI for TRP1 and the single TRP CSI for TRP2, and uses N CMR pairs to measure the NCJT CSI.

[0176] The UE selects to report more than one CSI based on the mode (CSI reporting mode) set by csi-ReportMode. csi-ReportMode represents one of the following two modes (NCJT CSI modes): mode 1 and mode 2.

[0177] - Mode 1

[0178] 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, 2. In the case of X = 2, the two CSIs are associated with two different single TRP measurement hypotheses accompanying multiple CMRs from different CMR groups. Support for X = 1, 2 is an optional function for UEs supporting option 1.

[0179] - Mode 2

[0180] The UE is configured to report a CSI that is associated with the best one within the measurement premise of NCJT and single TRP.

[0181] In Mode 1, the UE reports a total of X+1 CSIs, including X (X = 0, 1, 2) single TRP CSIs and 1 NCJT CSI. In Mode 2, the UE reports the best CSI (1 CSI) from all single TRP CSIs and 1 NCJT CSI.

[0182] A single CSI report can report up to two single TRP CSIs and one NCJT CSI (with X=2 in Mode 1). An NCJT CSI includes one CRI, two RIs (with a joint RI index), two PMIs, two LIs, and one CQI (for levels 4 and below). A single TRP CSI is the same as an existing CSI, including one CRI, one RI / PMI / LI, and one or two CQIs (for levels 8 and below, one CQI per CW).

[0183] Define a new mapping order (table) for multiple fields within a CSI report for the following scenarios.

[0184] • Mapping order for Wideband CSI in Mode 1 with X=0. Wideband CSI is only supported for Mode 1 with X=0, i.e., NCJT CSI.

[0185] • The mapping order for CSI part 1 of modes 1 and 2.

[0186] • Mapping order for the CSI part 2 broadband of modes 1 and 2.

[0187] • Mapping order of CSI part 2 subbands for modes 1 and 2.

[0188] (CJT CSI)

[0189] In the ideal scenario (where the four TRPs are co-located (considered to be at the same location), joint estimation of the aggregated channel matrix H is possible, enabling feedback of the joint precoding matrix V. However, the large-scale path losses of the four paths can vary significantly. The joint precoding matrix V based on a constant module codebook is inaccurate. In this case, the feedback for each TRP and the inter-TRP coefficients can be matched using the current Type 2 codebook of the NR.

[0190] For a CJT with a maximum of four TRPs in FR1, the selection of the four TRPs can also be semi-static. Therefore, the selection, and the setting of the four CMRs (four CSI-RS resources) used for channel measurements, can also be semi-static. Dynamic indication of the four TRPs from a list of CSI-RS resources is also possible, but less likely.

[0191] The path loss from the four TRPs to the UE is different. Therefore, it is difficult to report only one aggregated CSI representing the joint channel matrix.

[0192] Consider the rollback operation to NCJT (i.e., single TRP), and also consider the CSI of each TRP (i.e., single TRP CSI like the NCJT CSI in Rel.17).

[0193] Envisioning ideal backhaul, synchronization, and the same number of antenna ports across multiple TRPs, CSI acquisition for coherent joint transmission (CJT) for FR1 and up to four TRPs is under investigation. For CJT multi-TRP for FDD, improvements to the Type 2 codebook of Rel.16 / 17 are being investigated.

[0194] For each TRP, W1 (SD substrate) / W f (FD substrate) can be the same or different. For each TRP, W... l (NZC) can also be different. W1 / W for each TRP f / W l They can be selected jointly or individually. For W1 / W f / W l The design is preferably tailored to different scenarios with different options. φ It can also be reported as a separate piece of content, or it can be included in W. l The internal reporting is as follows. These guidelines cover configuration scenarios such as intra-site multiple TRPs or inter-site multiple TRPs.

[0195] For example, the precoding matrix used for 4-TRP CJT CSI (codebook) can also be derived from W1 / W for each TRP. f / W l This indicates that W1 for each TRP can be the same or different, and can be selected jointly or individually. W1 for each TRP... lThey can also be different; they can be chosen together or individually. W for each TRP f They can be the same or different; they can be chosen together or individually.

[0196] In the (Rel.18) type 2 codebook (codebook structure) used for CJT multi-TRP (mTRP), at least one of the following modes (CJT codebook mode, CJT CSI mode) can also be supported.

[0197] - Mode 1 is the SD / FD basis selection for each TRP / each TRP group. This allows for independent FD basis selection across N TRPs / TRP groups. For example, the codebook structure is provided by the following formula. Here, N is the number of TRPs or TRP groups.

[0198]

[0199] - Mode 2 is the SD base selection for each TRP / each TRP group (port group or resource) and the joint / common FD base selection (across N TRPs / TRP groups). For example, this codebook structure is provided by the following formula. Here, N is the number of TRPs or TRP groups.

[0200]

[0201] In both modes, detailed designs such as parameter combinations, substrate selection, TRP (group) selection, reference amplitude, and W2 quantization methods can also be publicized.

[0202] (Constraint settings for Type 2 codebook)

[0203] When the UE is configured with higher-level parameters (codebookType) set to 'typeII', the bitmap parameters (type2RI constraint, typeII-RI-Restriction) form a bit sequence r1, r0. Here, r0 is the least significant bit (LSB), and r1 is the most significant bit (LSB). For i∈{0,1}, r i When the value is zero, PMI and RI reports are not allowed to correspond to any precoder associated with v = i + 1.

[0204] The bitmap parameters n1-n2-codebookSubsetRestriction form a bit sequence B = B1B2. Here, bit sequences B1 and B2 are concatenated to form B. To define B1 and B2, the O1O2 vector groups G(r1,r2) are first defined as follows.

[0205] G(r1,r2)={v N_1*r_1＋x_1,N_2*r_2＋x_2 :x1=0,1,...,N1-1;x2=0,1,...,N2-1}

[0206] r1∈{0,1,...,O1-1}

[0207] r2∈{0,1,...,O2-1}

[0208] The UE is constrained for four vector groups, which are given by (r1) for k = 0, 1, 2, 3. （k） r2 （k） This indicates that the group index g for k = 0, 1, 2, 3 is used. （k） =O1r2 （k） +r1 （k） Distinguish. Its index is based on the fact that if k increases, then g... （k） The method of addition is assigned. The remaining vector groups are not restricted.

[0209] - If N2 = 1, and for k = 0, 1, 2, 3, g （k） When the value is k, B1 is empty.

[0210] - If N2 > 1, then B1 = b1 （10） …b1 （0） This is the binary representation of the integer β1. Here, b1 （10） It's MSB, b1 （0） It is an LSB. β1 is based on β1=Σ k＝0 3 C(O1O2-1-g) （k） We obtain C(x,y) from k = 0, 1, 2, 3. Here, C(x,y) is the binomial coefficient. The group index g for k = 0, 1, 2, 3 is... （k） and the indicator (r1) （k） r2 （k） The following algorithm is used to obtain it based on β1.

[0211] s -1 =0 for k=0,1,2,3

[0212] Searching for β1-s k-1 The largest x*∈{3-k,...,O1O2-1-k} is ≥C(x*,4-k).

[0213] e k =C(x*,4-k)

[0214] s k =s k-1 +e k

[0215] g （k） =O1O2-1-x*

[0216] r1 （k） =g （k） mod O1

[0217] r2 （k） = (g （k） -r1 （k） ) / O1

[0218] Bit sequence B2 = B2 （0） B2 （1） B2 （2） B2 （3） This applies to k = 0, 1, 2, 3, and g （k） The corresponding bit sequence B2 （k） The connection. Bit sequence B2 （k） Defined as B2 （k） =b2 （k,2N_1*N_2-1） …b2 （k,0） .

[0219] bit b2 （k,2（N_1*x_2＋x_1）＋1） b2 （k,2（N_1*x_2＋x_1）） This refers to the group g that is indexed by x1, x2. （k） The maximum allowable amplitude coefficient p of the vector within l,i （1） The maximum permissible amplitude coefficient is at Figure 7 The table is provided. UEs that do not expect to not report parameters `amplitudeSubsetRestriction='supported'` in capability signaling are set to b2. （k ,2（N_1*x_2＋x_1）＋1） b2 （k,2（N_1*x_2＋x_1）） =01 or 10.

[0220] (Constraint settings for enhanced type 2 codebook)

[0221] The bitmap parameters n1-n2-codebookSubsetRestriction-r16 form the bit sequence B = B1B2, and similarly to the type 2 codebook, the vector group index g is set. （k） Bit b2 （k,2（N_1*x_2＋x_1）＋1） b2 （k,2（N_1*x_2＋x_1））For i∈{0,1,...,L-1}, it represents the group g that is indexed by x1,x2. （k） The maximum permissible average amplitude γ of the coefficients of the vectors within the vectors. i＋pL (p = 0, 1). Maximum amplitude (maximum permissible average amplitude, maximum average coefficient amplitude) in Figure 8 The table provided shows that the average coefficient amplitude for l = 1, ..., v and p = 0, 1 is constrained by the following formula.

[0222]

[0223] UEs that do not expect to have the parameter softAmpRestriction-r16='supported' set in capability signaling are not expected to be configured in b2. （k,2（N_1*x_2＋x_1）＋1） b2 （k,2（N_1*x_2＋x_1）） =01 or 10.

[0224] n1-n2-codebookSubsetRestriction / n1-n2-codebookSubsetRestriction-r16 represents the number of antenna ports (N1, N2) in the first and second dimensions, and the CBSR. The number of bits in the CBSR (bitmap) is ceil(log2(nchoosek(O1*O2,4))) + 8*n1*n2. Here, nchoosek(a,b) = a! / (b!(ab)!).

[0225] (Study #1)

[0226] In improvements to the type 2 codebook for CJT mTRP, research is underway regarding CBSR, where, under constraints of at least SD basis selection, existing CBSR methods are applied to N set by RRC. TRP Each of the CSI-RS resources is fully reused (resulting in a CSI-RS resource-specific SD beamgroup constraint). This is a TRP-specific (CMR-specific) CBSR setting associated with the SD base selection. Across N TRP Each CSI-RS resource is subject to constraints of the same rank.

[0227] As for the CBSR used to enhance type 2 CSI, the CBSR related to SD substrate selection (CBSR related to B1) and the CBSR related to amplitude constraint (CBSR related to B2) are considered. The CBSR related to B1 is set for each TRP. The setting of the CBSR related to B2 is not explicit.

[0228] (Study #2)

[0229] In the improvement of the Type 2 codebook for CJT mTRP, it is being studied that the UE selects N CSI-RS resources and reports them as part of the CSI report. Here, N∈{1,...,N} TRP}

[0230] - N is the number of collaborative CSI-RS resources (TRPs). TRP It is the maximum number of cooperative CSI-RS resources (TRP), which is set by the base station via higher-layer signaling.

[0231] - For the purpose of CSI reporting and to indicate the TRP selected by the UE, the UE may also report N in CSI section 1 (UCI). TRP A bitmap of bits. From N TRP The selection of N CSI-RS resources can also be achieved through N in CSI section 1. TRP The UE reports using a bitmap of bits. For example, if N = 4 TRPs are set and the UE selects the 1st and 3rd TRPs, the UE can also report a bitmap representing the selection

[1010] .

[0232] - It can also support N=N TRP The limitation can be set, and this limitation can also be set via higher-layer signaling through the base station. For example, when N=N is set... TRP In the case of 4 TRPs, the UE can also report the CJT CSI of the envisioned 4-TRP CJT. If this limitation is set, N may not be reported. TRP Bitmap of bits.

[0233] - This feature can also be an optional feature for the UE.

[0234] N TRP The candidate values ​​can also be 1, 2, 3, 4. A transmission hypothesis can also be reported, and the UE does not need to calculate CSI for multiple transmission hypotheses.

[0235] Base stations can also be configured for N for CJT mTRP. TRP =1, 2, 3, 4 or more CMRs. The number of TRPs selected by the UE can also be N∈{1,...,N TRP This means that in order to report, only one TRP (Single TRP CSI) can be selected.

[0236] (Study #3)

[0237] As mentioned earlier, in the Type 2 codebook (Rel. 15), the CBSR setting parameters are based on the bit sequence B of B1B2. B1 corresponds to the SD basis selection constraint, which is 11 bits when N2 > 1. B2 corresponds to the amplitude constraint for four vector groups. In B2 for one vector group... （k） In this case, 2N1N2 is required.

[0238] (Study #4)

[0239] As mentioned earlier, in the Enhanced Type 2 Codebook (Rel. 16), the CBSR setting parameters are based on the bit sequence B of B1B2. B1 corresponds to the SD basis selection constraint. B2 corresponds to the amplitude constraint for four vector groups. The vector groups are SD basis groups. The study is investigating the TRP-specific (B1B2) parameter of B1. 1,1 B 1,2 B 1,3 B 1,4 Enhancement, targeting N TRP =4 and N2>1, B1 may become 44 bits.

[0240] However, how to support multiple TRPs for B2 is unclear. If such operation is unclear, there are concerns that it could lead to reduced throughput / communication quality.

[0241] Therefore, the inventors of this invention conceived of a method for supporting / setting parameters for CJT CSI.

[0242] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Furthermore, the following embodiments (e.g., various scenarios) can be used individually or in combination of at least two.

[0243] In this disclosure, "A / B" and "at least one of A and B" may be rewritten as each other. In addition, in this disclosure, "A / B / C" may also mean "at least one of A, B and C".

[0244] In this disclosure, terms such as notification, activation, deactivation, indication (or indication), selection, configuration, update, and determination can be overridden. Similarly, terms such as support, control, ability to control, operation, and ability to operate can also be overridden.

[0245] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-level parameters, fields, Information Elements (IE), settings, etc., can also be modified interchangeably. In this disclosure, Medium Access Control elements (MAC Control Element (CE)), update commands, activation / deactivation commands, etc., can also be modified interchangeably.

[0246] In this disclosure, higher-layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., messages from the core network such as positioning protocol messages, such as NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP) messages), or combinations thereof.

[0247] In this disclosure, MAC signaling may also use, for example, a MAC Control Element (MACCE) or a MAC Protocol Data Unit (PDU). Broadcast information may also be, for example, a Master Information Block (MIB), a System Information Block (SIB), a Minimum System Information (Remaining Minimum System Information (RMSI)), or Other System Information (OSI).

[0248] In this disclosure, physical layer signaling may also be, for example, downlink control information (DCI), uplink control information (UCI), etc.

[0249] In this disclosure, a b c a_b^c can also be interchanged. In this disclosure, a b a and b can also be interchanged. In this disclosure, a ca^c can also be rewritten interchangeably. In this disclosure, ceil(x), the ceiling function, and the floor function can also be rewritten interchangeably. In this disclosure, floor(x), the floor function, and the floor function can also be rewritten interchangeably.

[0250] In this disclosure, the terms "basis", "DFT basis", "basis vector", and "DFT basis vector" can be interchanged. Similarly, the terms "SD basis", "SD-DFT basis", "beam", "SD beam", "SD 2D-DFT vector", "SD basis vector", "beam index", and "i" can also be interchanged. Furthermore, the terms "L" and "L" can be interchanged. n The SD beam count, beam count, and SD 2D-DFT vector count can also be rewritten interchangeably. In this disclosure, the FD basis, FD-DFT basis, FD beam, FD basis vector, FD-DFT basis vector, FD basis vector index, and f can also be rewritten interchangeably.

[0251] In this disclosure, size (dimensions), length, and number (quantity) can also be interchanged.

[0252] In this disclosure, CSI, codebook, and PMI can also be rewritten.

[0253] In this disclosure, TRP and CSI-RS resources can also be rewritten.

[0254] In this disclosure, CJT, mTRP, and CJT mTRP can be rewritten interchangeably. In this disclosure, the mode, codebook mode, CJT codebook mode, and CJT CSI mode can also be rewritten interchangeably.

[0255] In this disclosure, TRP, CSI-RS resource, CMR, CMR group, CSI-RS resource set, NZP-CSI-RS resource, NZP-CSI-RS resource set, CRI, one or more TRPs, combinations / pairs / sets / groups of TRPs, combinations / pairs / sets / groups of CMRs, combinations / pairs / sets / groups of NZP-CSI-RS resources, and combinations / pairs / sets / groups of CRIs can also be rewritten to each other.

[0256] In this disclosure, the number of TRPs for CJT, the number of CSI-RS resources for CJT CSI, N, N TRP X, N g They can also be rewritten from one another. In this disclosure, X TRPs, X-TRPs, X panels, N g The panels can also be rewritten from one another. In this disclosure, a CJT using X TRPs, a CJT using X panels, and an X-TRP CJT can also be rewritten from one another.

[0257] In this disclosure, the CJT CSI, at least one of the enhanced type 2 codebooks (Rel.16) and the appended enhanced type 2 PS codebook (Rel.17) can also be rewritten to each other.

[0258] In this disclosure, the vector group, the SD vector group, and the oversampled vector group of the antenna port can also be rewritten to each other.

[0259] (Wireless communication method)

[0260] <Implementation Method #A>

[0261] The codebook subset constraint (CBSR) (setting) in the CodebookConfig within CSI-ReportConfig used by multiple TRP CJT CSI can also follow at least one of the following options.

[0262] -Option 1

[0263] The multiple CBSR settings can also be a single CBSR setting. Its constraints can also be applied to any transmission prerequisite (single TRP CSI and CJT CSI).

[0264] -Option 2

[0265] The number of CBSR settings can be one or more, up to a maximum of four. Each CBSR setting can be used for a single TRP or a group of TRPs. For example, the number of CBSR settings can also 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 can also be applied to both single TRPs and multiple TRPs. For example, the number of CBSR settings can also be two CBSR settings, including one CBSR setting for TRP#1 and TRP#2, and one CBSR setting for TRP#3 and TRP#4.

[0266] -Option 3

[0267] The number of CBSR settings can be up to x. Each CBSR setting can also be a transmission prerequisite. For example, the number of CBSR settings can include one CBSR setting for a single TRP and one CBSR setting for multiple TRP CJT CSIs. For example, the number of CBSR settings can include one CBSR setting for a single TRP, one CBSR setting for 2-TRP CJT CSIs, one CBSR setting for 3-TRP CJT CSIs, and one CBSR setting for 4-TRP CJT CSIs.

[0268] -Option 4

[0269] The multiple CBSR settings can also consider the CBSR for each TRP or each TRP group, each transmission premise, and follow a combination of options 2 and 3. For example, the multiple CBSR settings can 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 multiple TRPs, a CBSR setting for TRP#2 in the case of multiple TRPs, a CBSR setting for TRP#3 in the case of multiple TRPs, and a CBSR setting for TRP#4 in the case of multiple TRPs. For example, the one or more CBSR settings may 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-TRPCJT, etc. For example, the one or more CBSR settings may 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 accompanying TRP#2, a CBSR setting for TRP#1 in the case of 2-TRP CJT accompanying TRP#3, a CBSR setting for TRP#1 in the case of 2-TRPCJT accompanying TRP#4, and a CBSR setting for TRP#1 in the case of 3-TRP CJT accompanying TRP#2 and TRP#3, etc.

[0270] -change

[0271] In addition to options 1 / 2 / 3 / 4, the CBSR setting can also consider different combinations of L values ​​for different TRPs in multiple combinations of L values ​​used with the number of SD bases.

[0272] It can also import / report UE capabilities related to RI constraints for options 1 / 2 / 3 / 4 / changes.

[0273] The structure of the new codebook settings for multi-TRP CSI under CSI-ReportConfig (e.g., CodebookConfig-r18) can be followed for option 2. Figure 9A For example, you can also follow option 4. Figure 9B Examples.

[0274] Within CSI-ReportConfig, CodebookConfig can be configured to accompany up to four CBSRs. The first constraint can also be applied to PMIs reported in association with the first CSI-RS resource. The second constraint can also be applied to PMIs reported in association with the second CSI-RS resource. The third constraint can also be applied to PMIs reported in association with the third CSI-RS resource. The fourth constraint can also be applied to PMIs reported in association with the fourth CSI-RS resource.

[0275] According to this implementation, the UE can be appropriately configured with CBSR for multiple TRP CJT CSIs.

[0276] <Implementation Method #1>

[0277] This relates to the CBSR associated with amplitude constraints used in CJT CSI.

[0278] CJT CSI settings can also follow at least one of the following options.

[0279] - Option 1

[0280] In the CJT CSI settings, CBSR related to amplitude constraints is not supported.

[0281] This option can also follow one of the following options.

[0282] -- Option 1-1

[0283] B2 was not notified.

[0284] -- Options 1-2

[0285] B2 is notified. Alternatively, it can be specified that the UE does not expect to be set within B2. （k,2（N_1*x_2＋x_1）＋1） b2 （k ,2（N_1*x_2＋x_1）） =01 or 10. In the aforementioned... Figure 8 In the table, you can either keep only the rows with 01 and 10 for the purpose of indication, or you can keep only the rows with 00 and 11 for the purpose of indication.

[0286] - Option 2

[0287] In the CJT CSI settings, CBSR related to amplitude constraints is supported.

[0288] This option can also follow at least one of the following options.

[0289] -- Option 2-1

[0290] B2 is notified. Alternatively, it can be specified that the UE does not expect to be set within B2. （k,2（N_1*x_2＋x_1）＋1） b2 （k ,2（N_1*x_2＋x_1）） =01 or 10. In the aforementioned... Figure 8 In the table, you can either keep only the rows with 01 and 10 for the purpose of indication, or you can keep only the rows with 00 and 11 for the purpose of indication.

[0291] -- Option 2-2

[0292] B2 is notified. Similar to existing specifications, the UE can configure b2 within B2. （k,2（N_1*x_2＋x_1）＋1） b2 （k ,2（N_1*x_2＋x_1）） =00,01,10, or 11.

[0293] - Option 3

[0294] In the CJT CSI settings, when a single TRP (N) is configured... TRP Even with a value of 1, CBSRs related to amplitude constraints can still be supported. In the CJT CSI settings, when multiple TRPs (N) are set... TRP In cases where >1), CBSR related to amplitude constraints may not be supported. The base station may also be in N... TRP When the value is greater than 1, a CBSR is set for multiple TRPs. If the UE selects a single TRP, the UE can also ignore the setting / indication of amplitude-related CBSRs for multiple TRPs. If the base station sets a CBSR (B1 or B2) for each TRP, and the UE selects a subset of TRPs to report, the UE can also ignore the setting of CBSRs (B1 and B2) for TRPs that are not selected / reported.

[0295] - Option 4

[0296] In the CJT CSI settings, when a single TRP (N) is configured... TRP In the case of =1), CBSR related to amplitude constraints may not be supported. In the CJT CSI settings, when multiple TRPs (N) are set... TRP In the case of >1), CBSR related to amplitude constraints may not be supported.

[0297] In the above options, where amplitude-constrained CBSRs for CJT CSI are supported, UE capability reports / signaling and RRC settings / signaling can also be imported. UE capability parameters can also be, for example, softAmpRestriction-r18, softAmpRestriction-MTRPCJT-r18, etc.

[0298] According to this implementation, the UE can be configured with the appropriate CBSR in the CJT CSI settings.

[0299] <Implementation Method #2>

[0300] This implementation is the case in Implementation #1 that supports CBSR (B2) related to amplitude constraint for CJT CSI.

[0301] In implementation #1, in the case of supporting amplitude constraint-related CBSR for CJT CSI, the UE and the base station may also follow at least one of the following options.

[0302] - Option 1

[0303] The B2 parameter of the CBSR can also be set for each TRP / CSI-RS resource, and for each restricted / indicated vector group. In this case, enhancements are applied to up to four TRPs. The signaling overhead for B2 becomes N. TRP The maximum number of bits is 2N1N2 = 32 bits per vector group. Therefore, the maximum number of bits for each TRP is 128 bits. The maximum number of bits for 4 TRPs is 512 bits.

[0304] - Option 2

[0305] The B2 parameter of the CBSR can also be set for each TRP / CSI-RS resource. The B2 parameter of the CBSR can also be common to multiple vector groups within a TRP. In this case, the same B2 parameter can be applied to the indicated vector groups within a TRP. 2,i It can also be instructed to B. 2,i (For example, B) 2,1 （0） B 2,2 （0） B 2,3 （0） B 2,4 （0） The number of TRPs N TRP i = 1, 2, ..., N TRPIt can also be a TRP ID. For example, in the case of enhancing to 4 TRP, the size of B2 can also be 2N1N2*4 = 32*4 = 128 bits. For example, in the case of enhancing to 3 TRP, the size of B2 can also be 2N1N2*3 = 32*3 = 96 bits.

[0306] - Changes to Option 2

[0307] The B2 parameter of CBSR can also be set for each TRP group / CSI-RS resource group.

[0308] - Option 3

[0309] The B2 parameter of the CBSR can also be set for each vector group across multiple TRPs. The B2 parameter of the CBSR can also be common to the same vector group ID from different TRPs. In this case, the same B2 parameter can also be applied to the same vector group across different TRPs. （j） It can also be indicated as B2. （j） (For example, B2) （0） B2 （1） B2 （2） B2 （3） The number of restricted SD basis (vector) groups J. j = 0, 1, ..., J-1 can also be the vector group ID. For example, in the case of more than one TRP enhancement, the size of B2 can also be 2N1N2*4 = 32*4 = 128 bits.

[0310] - Changes to Option 3

[0311] The B2 parameter of the CBSR can also be set for each of multiple vector groups within each TRP, or for each of multiple vector groups across multiple TRPs.

[0312] - Option 4

[0313] Alternatively, the B2 parameter can be set for each TRP, which is common to the CBSR for the vector group. In this case, a single B2 parameter can also be specified. For example, the size of B2 can also be 32 bits.

[0314] In options 1 and 2, CBSR settings are performed per TRP, and the number of TRPs used for CBSR settings (the number of CBSR settings) can also match the number of TRPs / CMRs used in CJT. In a variation of option 2, CBSR settings are performed per TRP group, and the number of CBSR settings can also match the number of TRP groups used in CJT, rather than the number of TRPs / CMRs used in CJT. In option 3, CBSR settings span multiple TRPs, and the number of CBSR settings does not increase with the number of TRPs / CMRs used in CJT. Alternatively, there can be only one CBSR setting for a single TRP, applied to all TRPs.

[0315] B1 and B2 can also be notified separately.

[0316] Regarding the options, you can import either UE capability reports / signaling or RRC settings / signaling. Regarding whether to support / activate at least one of the following: B2 for each TRP, B2 for each vector group, B2 shared by multiple TRPs, and B2 shared by multiple vector groups, you can import either UE capability reports / signaling or RRC settings / signaling.

[0317] According to this implementation, the UE can be configured with the appropriate B2 in the CJT CSI settings.

[0318] <Implementation Method #3>

[0319] This implementation relates to signaling used for CBSR.

[0320] For at least one of the CBSR (B1) related to SD base selection constraints and the CBSR (B2) related to amplitude constraints used for CJT CSI, signaling for at least one of the individual / joint UE capability reporting / signaling and the individual / joint RRC setting / signaling can also be imported.

[0321] The signaling can also be at least one of the following: signaling for each TRP, signaling for each CSI-RS resource, signaling for each CMR, signaling for each TRP group, signaling for each CSI-RS resource group, and signaling for each CMR group.

[0322] The signaling can also be at least one of the signaling for each single TRP hypothesis or each multiple TRP hypothesis.

[0323] Additional signaling indicating whether at least one of the CBSRs associated with the SD base selection constraint and the amplitude constraint (B2) for CJT CSI is activated per TRP can also be imported.

[0324] For CBSRs associated with at least one of B1 and B2, the signaling parameters of the CBSR can be omitted (or not set) for TRPs that are indicated as "invalid".

[0325] You can also import individual or combined settings / signaling / bitmaps for the activation of CBSRs related to B1 and B2. For example, in the signaling for B1, such as... Figure 10 As in the example, the right-hand bits are LSBs, and the i-th bit (i = 1, 2, 3, 4) from the right indicates the activation of the CBSR associated with B1 for TRP#i. When '1100' is used in the indication of activation of the CBSR associated with B1 for TRP#3 and TRP#4, only B1 for TRP#3 and B1 for TRP#4 are set. In this case, the size of B1 can also be 11 * 2 = 22 bits. For example, based on option 2 of implementation method #2, in the signaling for B2, as... Figure 10 As in the example, the right-hand bits are LSBs, and the i-th bit from the right (i = 1, 2, 3, 4) indicates the activation of the CBSR associated with B2 for TRP#i. When '1100' is used in the indication of CBSR activation associated with B2 for TRP#3 and TRP#4, only B2 for TRP#3 and B2 for TRP#4 are set. In this case, the size of B2 can also be 32 * 2 = 64 bits. For example, based on option 1 of implementation method #2, the signaling used for B2 can also be as follows... Figure 11 As in the example, the right-hand bits are LSBs. The 4*(i-1)i+j+1 bits from the right (i=1,2,3,4, j=0,1,2,3) represent the activation of the B2-related CBSR for vector group #j from TRP#i. The activation of the B2-related CBSR for vector groups #2 and #3 from TRP#4, and vector group #3 from TRP#1, #2, and #3, is indicated using '1100100010001000'. In this case, the size of B2 can also be 32*4=128 bits.

[0326] Support for / setting of CBSRs related to B1 can also be a prerequisite for support for / setting of CBSRs related to B2. Alternatively, only UEs that support CBSRs related to B1 can support CBSRs related to B2. Conversely, only UEs that have CBSRs related to B1 set can also have CBSRs related to B2 set.

[0327] According to this implementation, the UE can be appropriately configured in the CJT CSI settings to determine whether the CBSR associated with B1 / B2 is valid.

[0328] <Supplement>

[0329] [Information notification to UE]

[0330] In the above embodiments, any information (notification from the Network (NW) (e.g., Base Station (BS)) to the UE) (in other words, the reception of any information from the BS in the UE) can also be delivered using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PDCCH, PDSCH, reference signals), or combinations thereof.

[0331] In the case where the above notification is made via MAC CE, the MAC CE can also be identified by including a new Logical Channel ID (LCID) that is not specified in the existing standard in the MAC subheader.

[0332] When the above notification is made through a DCI, the notification can also be made through specific fields of the DCI, the Radio Network Temporary Identifier (RNTI) used in the scrambling of the Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0333] Furthermore, the notification of any information to the UE in the above embodiments can also be carried out periodically, semi-persistently, or non-periodically.

[0334] [Notification from UE]

[0335] The notification of any information from the UE (to the NW) in the above embodiments (in other words, the transmission / reporting of any information from the UE to the BS) can also be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signals), or combinations thereof.

[0336] In the case where the above notification is made via MAC CE, the MAC CE can also be identified by including a new LCID in the MAC subheader that is not specified in the existing standard.

[0337] In cases where the above notification is sent via UCI, the above notification may also be sent using PUCCH or PUSCH.

[0338] Furthermore, the notification of any information from the UE in the above embodiments can also be carried out periodically, semi-persistently, or non-periodically.

[0339] [Regarding the application of each implementation method]

[0340] At least one of the above-described implementation methods can also be applied under certain conditions. These specific conditions can be specified in the standard or communicated to the UE / BS using higher-layer signaling / physical layer signaling.

[0341] At least one of the above implementation methods may also be applied only to UEs that have reported a specific UE capability or support that specific UE capability.

[0342] This specific UE capability can also represent at least one of the following:

[0343] • Supports specific processing / operation / control / information for at least one of the above-described embodiments.

[0344] • Supports CBSR for CJT CSI.

[0345] • Supports amplitude-constrained CBSRs for CJT CSI.

[0346] • Supports CBSRs related to SD basis selection constraints for CJT CSI.

[0347] Furthermore, the aforementioned specific UE capabilities can be capabilities that apply across all frequencies (frequency-independent and common), capabilities that apply to each frequency (e.g., one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), capabilities that apply to each frequency range (e.g., Frequency Range 1 (FR1)), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities that apply to each subcarrier spacing (SCS) or capabilities that apply to each feature set (FS) or each feature set per component carrier (FSPC).

[0348] Furthermore, the aforementioned specific UE capabilities can be either capabilities that apply to all duplex modes (commonly regardless of the duplex mode) or capabilities that apply to each duplex mode (e.g., Time Division Duplex (TDD) and Frequency Division Duplex (FDD)).

[0349] Furthermore, at least one of the above-described embodiments can also be applied when the UE is set / activated / triggered by specific information associated with the above-described embodiments (or performs the operation of the above-described embodiments) via higher-layer signaling / physical layer signaling. For example, this specific information may be information indicating the activation of the operation of the above-described embodiments, arbitrary RRC parameters for a specific version (e.g., Rel.18 / 19), etc.

[0350] The UE may also apply Rel.15 / 16 operations if it does not support at least one of the above-mentioned specific UE capabilities or if the above-mentioned specific information is not set.

[0351] (Postscript)

[0352] With respect to one embodiment of this disclosure, the following invention is noted.

[0353] [Postscript 1]

[0354] A terminal having:

[0355] The receiving unit receives settings including bitmap parameters representing codebook subset constraints for coherent joint transmission; and

[0356] The control unit, based on the settings, applies the bitmap parameters to the Channel State Information (CSI) report and controls the CSI reporting.

[0357] [Postscript 2]

[0358] The terminal as described in Appendix 1, wherein,

[0359] The control unit determines whether to use the amplitude-related constraints within the bitmap parameters based on whether the setting represents a single transmit / receive point (TRP).

[0360] [Postscript 3]

[0361] The terminal as described in Appendix 1 or Appendix 2, wherein,

[0362] The bitmap parameters represent amplitude-related constraints for at least one of the Transmit / Receive Point (TRP), CSI-Reference Signal (RS) resource, TRP group, CSI-RS resource group, and vector group.

[0363] [Postscript 4]

[0364] The terminal described in any of Notes 1 to 3, wherein...

[0365] The bitmap parameters indicate whether at least one of the constraints related to the selection of the spatial domain basis and the constraints related to the amplitude is valid.

[0366] (Wireless communication system)

[0367] The structure of a wireless communication system according to one embodiment of this disclosure will now be described. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of this disclosure.

[0368] Figure 12 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment. The wireless communication system 1 (also referred to simply as System 1) may also be a system that uses Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) as standardized by the Third Generation Partnership Project (3GPP) to achieve communication.

[0369] Furthermore, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC can 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)), etc.

[0370] 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.

[0371] Wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (e.g., MN and SN are dual connectivity between NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0372] The wireless communication system 1 may also include a base station 11 forming a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a-12c) configured within the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. The user terminal 20 may also be located within at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the arrangement shown in the figure. Hereinafter, without distinguishing between base stations 11 and 12, they will be collectively referred to as base station 10.

[0373] User terminal 20 may also connect to at least one of multiple base stations 10. User terminal 20 may also utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0374] Each CC can also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). Macro cell C1 can also be included in FR1, and small cell C2 can also be included in FR2. For example, FR1 can also be a frequency band below 6 GHz (sub-6 GHz), and FR2 can also be a frequency band above 24 GHz (above-24 GHz). In addition, the frequency bands, definitions, etc. of FR1 and FR2 are not limited to these; for example, FR1 can also be equivalent to a frequency band higher than FR2.

[0375] In addition, user terminal 20 can also use at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) to communicate in each CC.

[0376] Multiple base stations 10 can also be connected via wired (e.g., fiber optic cable based on the Common Public Radio Interface (CPRI), 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 is equivalent to a host station, can also be referred to as an Integrated Access Backhaul (IAB) donor, and base station 12, which is equivalent to a relay station, can also be referred to as an IAB node.

[0377] Base station 10 may also be connected to core network 30 via other base stations 10 or directly. Core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0378] The core network 30 may also include, for example, user plane functions (UPF), access and mobility management functions (AMF), session management functions (SMF), unified data management (UDM), application functions (AF), data network (DN), location management functions (LMF), and network functions (NF) such as operation, administration and maintenance (OAM). Alternatively, multiple functions can be provided through a single network node. Furthermore, communication with external networks (e.g., the Internet) can also be achieved via the DN.

[0379] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0380] In wireless communication system 1, wireless access methods based on Orthogonal Frequency Division Multiplexing (OFDM) can also be used. For example, in at least one of the downlink (DL) and uplink (UL) links, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA) can also be used.

[0381] The wireless access method can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be used in the wireless access methods of UL and DL.

[0382] In the wireless communication system 1, the downlink channel can also be a shared downlink channel (Physical Downlink Shared Channel (PDSCH)), a broadcast channel (Physical Broadcast Channel (PBCH)), or a downlink control channel (Physical Downlink Control Channel (PDCCH)) shared by each user terminal 20.

[0383] In addition, in the wireless communication system 1, the uplink channel can also be the shared uplink channel (Physical Uplink Shared Channel (PUSCH)), the uplink control channel (Physical Uplink Control Channel (PUCCH)), the random access channel (Physical Random Access Channel (PRACH)) shared by each user terminal 20, etc.

[0384] User data, high-level control information, and System Information Blocks (SIBs) are transmitted via the PDSCH. User data and high-level control information can also be transmitted via the PUSCH. In addition, Master Information Blocks (MIBs) can also be transmitted via the PBCH.

[0385] Lower-layer control information can also be transmitted via PDCCH. This lower-layer control information may include, for example, downlink control information (DCI), which includes scheduling information for at least one of PDSCH and PUSCH.

[0386] Additionally, the DCI that schedules PDSCH can also be called DL allocation, DL DCI, etc., and the DCI that schedules PUSCH can also be called UL authorization, UL DCI, etc. Furthermore, PDSCH can be rewritten as DL data, and PUSCH can be rewritten as UL data.

[0387] In PDCCH detection, a Control Resource Set (CORESET) and a search space can also be utilized. A CORESET corresponds to the resources used to search for DCIs. The search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor CORESETs associated with a specific search space based on search space settings.

[0388] A search space can also correspond to one or more PDCCH candidates equivalent to one or more aggregation levels. One or more search spaces can also be referred to as a search space set. In addition, the terms "search space", "search space set", "search space setting", "search space set setting", "CORESET", and "CORESET setting" in this disclosure can be rewritten interchangeably.

[0389] The PUCCH can also transmit uplink control information (uplink control information (UCI)) that includes at least one of the following: Channel State Information (CSI), delivery confirmation information (e.g., also known as Hybrid Automatic Repeat Request ACK Knowledge (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR). The PRACH can also transmit random access preambles used for establishing connections with the cell.

[0390] In addition, in this disclosure, downlink, uplink, etc., may be described without the word "link". Furthermore, various channels may be described without the word "physical".

[0391] In wireless communication system 1, synchronization signals (SS) and downlink reference signals (DL-RS) can also be transmitted. In wireless communication system 1, DL-RS can also transmit cell-specific reference signals (CRS), channel state information reference signals (CSI-RS), demodulation reference signals (DMRS), positioning reference signals (PRS), and phase tracking reference signals (PTRS).

[0392] Synchronization signals can be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be called an SS / PBCH block, SS block (SSB), etc. In addition, SS, SSB, etc. can also be called reference signals.

[0393] Furthermore, in wireless communication system 1, the uplink reference signal (UL-RS) can also transmit measurement reference signals (sounding reference signals (SRS)) and demodulation reference signals (DMRS). Additionally, DMRS can also be referred to as user terminal-specific reference signals (UE-specific reference signals).

[0394] (Base station)

[0395] Figure 13 This diagram illustrates an example of the structure of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmit / receive unit 120, a transmit / receive antenna 130, and a transmission path interface (transmission line interface) 140. Alternatively, the control unit 110, the transmit / receive unit 120, the transmit / receive antenna 130, and the transmission path interface 140 may each be provided in more than one manner.

[0396] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the base station 10 may also possess other functional blocks required for wireless communication. A portion of the processing of each unit described below may also be omitted.

[0397] The control unit 110 performs overall control of the base station 10. The control unit 110 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the art to which this disclosure pertains.

[0398] The control unit 110 can also control signal generation and scheduling (e.g., resource allocation, mapping). The control unit 110 can also control transmission, reception, and measurement using the transmit / receive unit 120, transmit / receive antenna 130, and transmission path interface 140. The control unit 110 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmit / receive unit 120. The control unit 110 can also perform call processing (setting, releasing, etc.) of the communication channel, status management of the base station 10, and management of wireless resources.

[0399] The transmitting / receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting / receiving unit 120 may be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0400] The transmitting and receiving unit 120 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 1211 and an RF unit 122. The receiving unit can also be composed of a receiving processing unit 1212, an RF unit 122, and a measurement unit 123.

[0401] The transmitting and receiving antenna 130 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0402] The transmitting / receiving unit 120 can also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 can also receive the aforementioned uplink channel, uplink reference signal, etc.

[0403] The transmitting and receiving unit 120 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0404] The transmitting and receiving unit 120 (transmitting processing unit 1211) may, for example, perform processing at the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer (e.g., RLC retransmission control), and Medium Access Control (MAC) layer (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 110, and generate a bit string to be transmitted.

[0405] The transmitting and receiving unit 120 (transmitting processing unit 1211) can 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, and digital-to-analog conversion on the bit string to be transmitted, and output the baseband signal.

[0406] The transmitting and receiving unit 120 (RF unit 122) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 130.

[0407] On the other hand, the transmitting and receiving unit 120 (RF unit 122) can also amplify, filter, and demodulate the signals of the wireless frequency band received through the transmitting and receiving antenna 130 into the baseband signal.

[0408] The transmitting and receiving unit 120 (receiving and processing unit 1212) can also perform receiving and processing on the acquired baseband signal, including analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (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 acquire user data, etc.

[0409] The transmitting / receiving unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc., based on the received signal. The measurement unit 123 can 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)), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 110.

[0410] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between the device included in the core network 30 (e.g., the network node providing the NF), other base stations 10, etc., and can also acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0411] In addition, the transmitting unit and receiving unit of the base station 10 in this disclosure may also be composed of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0412] Additionally, the transmit / receive unit 120 can also transmit settings including bitmap parameters representing constraints on codebook subsets used for coherent joint transmission. The control unit 110 can also control the reception of Channel State Information (CSI) reports. The bitmap parameters based on these settings can also be applied to the CSI reports.

[0413] (User terminal)

[0414] Figure 14 This diagram illustrates an example of the structure 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. Alternatively, more than one of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be included.

[0415] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the user terminal 20 may also have other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0416] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the technical field to which this disclosure pertains.

[0417] The control unit 210 can also control signal generation, mapping, etc. The control unit 210 can also control transmission, reception, measurement, etc., using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmission / reception unit 220.

[0418] The transmitting / receiving 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 transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting / receiving unit 220 may be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0419] The transmitting and receiving unit 220 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit can also be composed of a receiving processing unit 2212, an RF unit 222, and a measurement unit 223.

[0420] The transmitting and receiving antenna 230 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0421] The transmitting / receiving unit 220 can also receive the downlink channel, synchronization signal, downlink reference signal, etc., mentioned above. The transmitting / receiving unit 220 can also transmit the uplink channel, uplink reference signal, etc., mentioned above.

[0422] The transmitting and receiving unit 220 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0423] The transmitting and receiving unit 220 (transmitting processing unit 2211) may, for example, perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 210, and generate the bit string to be transmitted.

[0424] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may 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 the baseband signal.

[0425] Furthermore, whether or not to apply DFT processing can be based on the transform precoding settings. For a certain channel (e.g., PUSCH), if transform precoding is enabled, the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above for transmitting the channel using the DFT-s-OFDM waveform; otherwise, the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above for transmitting the channel without performing DFT processing.

[0426] The transmitting and receiving unit 220 (RF unit 222) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 230.

[0427] On the other hand, the transmitting and receiving unit 220 (RF unit 222) can also amplify, filter, demodulate, etc., the signals of the wireless frequency band received by the transmitting and receiving antenna 230.

[0428] The transmitting and receiving unit 220 (receiving and processing unit 2212) can also perform receiving and processing on the acquired baseband signal, 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 obtain user data.

[0429] The transmitting / receiving unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can also perform RRM measurements, CSI measurements, etc., based on the received signal. The measurement unit 223 can 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), etc. The measurement results can also be output to the control unit 210.

[0430] Additionally, the measurement unit 223 can also derive channel measurements for CSI calculation based on channel measurement resources. Channel measurement resources can be, for example, non-zero power (NZP) CSI-RS resources. Furthermore, the measurement unit 223 can also derive interference measurements for CSI calculation based on interference measurement resources. Interference measurement resources can be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc. Additionally, CSI-IM can also be referred to as CSI-Interference Management (IM), and can be interchanged with zero power (ZP) CSI-RS. Furthermore, in this disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc., can also be interchanged.

[0431] Alternatively, the transmitting and receiving units of the user terminal 20 in this disclosure may also be composed of at least one transmitting / receiving unit 220 and transmitting / receiving antenna 230.

[0432] Additionally, the transmit / receive unit 220 may also receive settings containing bitmap parameters representing constraints on a codebook subset used for coherent joint transmission. The control unit 210 may also, based on these settings, apply the bitmap parameters to the Channel State Information (CSI) report and control the CSI reporting.

[0433] The control unit can also determine whether to use the amplitude-related constraints within the bitmap parameters based on whether the setting represents a single transmit / receive point (TRP).

[0434] The bitmap parameters may also represent amplitude-related constraints for at least one of the Transmit / Receive Point (TRP), CSI-Reference Signal (RS) resource, TRP group, CSI-RS resource group, and vector group.

[0435] The bitmap parameters may also indicate whether at least one of the constraints related to the selection of the spatial domain basis and the constraints related to the amplitude is valid.

[0436] (Hardware structure)

[0437] Furthermore, the block diagrams used in the description of the above embodiments illustrate functional units. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Moreover, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using a single device that is physically or logically combined, or it can be implemented by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. A functional block can also be implemented by combining the aforementioned single device or multiple devices with software.

[0438] Here, the functions include judgment, decision, determination, calculation, calculation, processing, export, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regard as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, a functional block (structural unit) that implements the sending function can also be called a transmitting unit, transmitter, etc. As described above, the implementation method of any of them is not particularly limited.

[0439] For example, in one embodiment of this disclosure, the base station, user terminal, etc., can also function as a computer for processing the wireless communication method of this disclosure. Figure 15 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment. The base station 10 and the user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0440] Furthermore, in this disclosure, terms such as apparatus, circuit, device, section, and unit can be interchanged. The hardware structure of base station 10 and user terminal 20 can be configured to include one or more of the apparatuses shown in the figures, or it can be configured not to include any of the apparatuses.

[0441] For example, only one processor 1001 is shown, but there can be multiple processors. Furthermore, processing can be performed by one processor, or simultaneously, sequentially, or by two or more processors using other methods. Additionally, processor 1001 can be implemented using more than one chip.

[0442] The functions of the base station 10 and the user terminal 20 are implemented, for example, by reading specific software (programs) 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 controls at least one of reading and writing data in the memory 1002 and the storage device 1003.

[0443] The processor 1001, for example, enables the operating system to operate and control the computer as a whole. The processor 1001 may also be composed of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, at least a portion of the control unit 110 (210), the transmit / receive unit 120 (220), etc., described above may also be implemented by the processor 1001.

[0444] 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 performs various processes accordingly. As a program, a program that causes the computer to perform 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 operated in the processor 1001; similar implementations can be made for other functional blocks.

[0445] The memory 1002 may also be a computer-readable recording medium, such as being composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage media. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 is capable of storing executable programs (program code), software modules, etc., for implementing the wireless communication method according to an embodiment of this disclosure.

[0446] Storage device 1003 may also be a computer-readable recording medium, such as a flexible disc, floppy disk, optical disk (e.g., compact disc ROM, CD-ROM), digital multifunction disk, Blu-ray disc, removable disk, hard disk, smart card, flash memory device (e.g., card, stick, key drive), stripe, database, server, or at least one other suitable storage medium. Storage device 1003 may also be referred to as an auxiliary storage device.

[0447] The communication device 1004 is hardware (transmitting and receiving device) used for communication between computers via at least one of a wired network and a wireless network. It is also referred to as a network device, network controller, network interface card (NIC), communication module, etc. To implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the aforementioned transmit / receive unit 120 (220) and transmit / receive antenna 130 (230) may also be implemented by the communication device 1004. The transmit / receive unit 120 (220) may also be implemented by physically or logically separating the transmit unit 120a (220a) and the receive unit 120b (220b).

[0448] Input device 1005 is an input device that receives input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, light-emitting diode (LED) lamp, etc.). Alternatively, input device 1005 and output device 1006 can also be an integrated structure (e.g., a touch panel).

[0449] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 can be configured as a single bus or as different buses between the devices.

[0450] Furthermore, the base station 10 and the user terminal 20 can 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 can also use this hardware to implement part or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0451] (Variation example)

[0452] Furthermore, the terms described in this disclosure, as well as those necessary for understanding this disclosure, may be replaced with terms that have the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be interchanged. Additionally, a signal may also be a message. A reference signal can also be abbreviated as RS, and may be referred to as pilot, pilot signal, etc., depending on the applied standard. Furthermore, a component carrier (CC) may also be referred to as cell, frequency carrier, carrier frequency, etc.

[0453] A radio frame can also be composed of one or more periods (frames) in the time domain. Each of these periods (frames) that constitute 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 (e.g., 1 ms) independent of the parameter set (numerology).

[0454] Here, the parameter set can also be communication parameters applied in at least one of the transmission and reception of a signal or channel. For example, the parameter set can also represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), 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.

[0455] In the time domain, a time 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.). In addition, a time slot can also be a time unit based on a set of parameters.

[0456] A time slot can also contain multiple mini-time slots. Each mini-time slot can also consist of one or more symbols in the time domain. Furthermore, a mini-time slot can also be called a sub-time slot. A mini-time slot can also consist of fewer symbols than a time slot. PDSCH (or PUSCH) transmitted in a time unit larger than a mini-time slot can also be called PDSCH (PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using mini-time slots can also be called PDSCH (PUSCH) mapping type B.

[0457] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols can also use their respective other names. Furthermore, the time units such as frames, subframes, time slots, mini-time slots, and symbols in this disclosure can be interchanged.

[0458] For example, a subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, and a time slot or a mini-time slot can also be called a TTI. That is, at least one of a subframe and a TTI can be a subframe in existing LTE (1ms), a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing TTI may not be called a subframe, but rather a time slot, mini-time slot, etc.

[0459] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules radio resources (frequency bandwidth, transmit power, etc., available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0460] TTI can also be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., and can also be a unit of processing such as scheduling and link adaptation. In addition, when a TTI is given, the actual time interval (e.g., the number of symbols) mapped to transmission blocks, code blocks, codewords, etc. can be shorter than the TTI.

[0461] Additionally, where a time slot or a mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can also be the minimum time unit for scheduling. Furthermore, the number of time slots (mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0462] A TTI with a duration of 1 ms can 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 can 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 time slot, a sub-time slot, a time slot, etc.

[0463] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can also be rewritten as a TTI with a duration of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) can also be rewritten as a TTI with a duration of less than a long TTI but more than 1 ms.

[0464] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can also contain one or more consecutive subcarriers. The number of subcarriers in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers in an RB can also be determined based on the parameter set.

[0465] Furthermore, an RB can contain one or more symbols in the time domain, and can also be a time slot, a mini-time slot, a subframe, or the length of a TTI. A TTI, a subframe, etc., can also be composed of one or more resource blocks.

[0466] In addition, one or more RBs can also be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0467] In addition, a resource block can also consist of one or more resource elements (REs). For example, an RE can also be a radio resource area consisting of a subcarrier and a symbol.

[0468] The Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RBs) used for a certain parameter set in a carrier. Here, common RBs can also be determined by the index of RBs based on the common reference point of the carrier. PRBs can also be defined in a BWP and appended with numbers within that BWP.

[0469] A BWP can also include a UL BWP (the BWP used by UL) and a DL BWP (the BWP used by DL). For a UE, one or more BWPs can also be set within a single carrier.

[0470] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Furthermore, the terms "cell," "carrier," etc., in this disclosure can be rewritten as "BWP."

[0471] Furthermore, the structures described above, such as radio frames, subframes, time slots, mini-time slots, and symbols, are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0472] Furthermore, the information, parameters, etc., described in this disclosure can be represented by absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by a specific index.

[0473] In this disclosure, the names used for parameters, etc., are not limiting names in any respect. Furthermore, the mathematical expressions, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name; therefore, the various names assigned to these various channels and information elements are not limiting names in any respect.

[0474] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be mentioned throughout the above description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0475] Furthermore, information, signals, etc., can be output in at least one of the following directions: from higher level (upper layer) to lower level (lower layer), and from lower layer to higher level. Information, signals, etc., can also be input and output via multiple network nodes.

[0476] 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.

[0477] The notification of information is not limited to the methods / implementations described in this disclosure, and may also be carried out by other methods. For example, the notification of information in this disclosure may also be implemented by physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI), etc.), 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 combinations thereof.

[0478] In addition, physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. Furthermore, RRC signaling can also be referred to as RRC messages, such as RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc. Additionally, MAC signaling can also be notified using, for example, a MAC Control Element (CE).

[0479] Furthermore, notification of specific information (e.g., a notification of “is X”) is not limited to explicit notification, but can also be implicit (e.g., by not providing that specific information, or by providing other information).

[0480] The determination can be made by a value represented by a single bit (0 or 1), by a true or false value (boolean), or by a numerical comparison (e.g., a comparison with a specific value).

[0481] Whether software is called software, firmware, middleware, microcode, hardware description language, or any other name, it should be broadly interpreted to refer to instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0482] Furthermore, software, instructions, and information can also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0483] The terms “system” and “network” as used in this disclosure are interchangeable. “Network” may also mean devices included in a network (e.g., base stations).

[0484] In this disclosure, the terms “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”, “beamwidth”, “beam angle”, “antenna”, “antenna element”, “panel”, “UE panel”, “transmitting entity”, and “receiving entity” are used interchangeably.

[0485] Furthermore, in this disclosure, the antenna port can also be rewritten with an antenna port used for any signal / channel (e.g., a DeModulation Reference Signal (DMRS) port). In this disclosure, resources can also be rewritten with resources used for any signal / channel (e.g., reference signal resources, SRS resources, etc.). Additionally, resources can also include time / frequency / code / spatial / power resources. Moreover, the spatial domain transmission filter can also include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0486] The aforementioned groups may include, for example, at least one of the following: spatial relation group, code division multiplexing (CDM) group, reference signal (RS) group, control resource set (CORESET) group, PUCCH group, antenna port group (e.g., DMRS port group), layer group, resource group, beam group, antenna group, panel group, etc.

[0487] Furthermore, in this disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, Codeword (CW), Transport Block (TB), RS, etc., can also be rewritten to each other.

[0488] Furthermore, in this disclosure, the TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, and joint TCI state can also be rewritten to each other.

[0489] Furthermore, in this disclosure, terms such as "QCL", "QCL concept", "QCL relationship", "QCL type information", "QCL property (QCLproperty / properties)", "specific QCL type (e.g., type A, type D) property", and "specific QCL type (e.g., type A, type D)" can be rewritten interchangeably.

[0490] In this disclosure, indexes, identifiers (IDs), indicators, indications, resource IDs, etc., can also be interchanged. In this disclosure, sequences, lists, sets, groups, clusters, subsets, etc., can also be interchanged.

[0491] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) can be interchanged. "Spatial relationship information (TCI state)" can also be interchanged with "a set of spatial relationship information (TCI states)," "one or more spatial relationship information," etc. TCI state and TCI can also be interchanged. Spatial relationship information and spatial relationship can also be interchanged.

[0492] In this disclosure, the terms "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. There are also instances where the terms macro cell, small cell, femtocell, and picocell are used to refer to a base station.

[0493] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​at least one of the base station and base station subsystem providing communication services within that coverage area.

[0494] In this disclosure, the information sent by the base station to the terminal can also be rewritten with the control / operation instructed by the base station to the terminal based on that information.

[0495] In this disclosure, the terms “Mobile Station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” are used interchangeably.

[0496] There are also instances where mobile stations are referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or several other appropriate terms.

[0497] At least one of the base station and the mobile station can also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Additionally, at least one of the base station and the mobile station can also be a device mounted on a moving object, the moving object itself, etc.

[0498] The term "mobile body" refers to a movable object whose speed is arbitrary, including situations where the body is stationary. Examples of such mobile bodies include vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, loading shovels, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, trolleys, rickshaws, ships (including vessels and other watercraft), airplanes, rockets, satellites, drones, multi-rotor aircraft, quadcopters, balloons, and objects carried on them, but are not limited to these. Furthermore, the mobile body can also be a mobile body that moves autonomously based on operational commands.

[0499] The mobile entity can be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile entity moving in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). Additionally, 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 also be an Internet of Things (IoT) device such as a sensor.

[0500] Figure 16 This figure illustrates an example of a vehicle according to one embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a gear 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 speed sensor 51, a pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a gear shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0501] The drive unit 41 is comprised of 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 called a handlebar) and to perform directional control on at least one of the front wheel 46 and the rear wheel 47 based on the operation of the steering wheel by the user.

[0502] The electronic control unit 49 consists of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (e.g., an input / output (IO) port) 63). Signals from various sensors 50-58 present in the vehicle are input into the electronic control unit 49. The electronic control unit 49 can also be referred to as an ECU (Electronic Control Unit).

[0503] The signals from various sensors 50-58 include current signals from current sensor 50 that senses the current of the motor, speed signals from front wheel 46 / rear wheel 47 obtained by speed sensor 51, air pressure signals from front wheel 46 / rear wheel 47 obtained by air pressure sensor 52, vehicle speed signals obtained by vehicle speed sensor 53, acceleration signals obtained by acceleration sensor 54, accelerator pedal 43 depress amount signals obtained by accelerator pedal sensor 55, brake pedal 44 depress amount signals obtained by brake pedal sensor 56, shift lever 45 operation signals obtained by shift lever sensor 57, and detection signals obtained by object detection sensor 58 for detecting obstacles, vehicles, pedestrians, etc.

[0504] The information service unit 59 comprises various devices such as a vehicle navigation system, audio system, speakers, display, television, and radio, used to provide (output) various information such as driving information, traffic information, and entertainment information, as well as one or more ECUs that control these devices. The information service unit 59 uses information obtained from external devices via the communication module 60, etc., to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0505] The information service unit 59 may include input devices that accept input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) or output devices that implement output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[0506] The driver assistance system unit 64 comprises various devices used to provide functions for preventing accidents and reducing the driver's workload, such as millimeter-wave radar, light detection and ranging (LiDAR), cameras, positioning devices (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 Unit (IMU)), Inertial Navigation System (INS)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. Furthermore, the driver assistance system unit 64 sends and receives various information via a communication module 60 and implements driver assistance or autonomous driving functions.

[0507] The communication module 60 can communicate with the microprocessor 61 and the structural elements of the vehicle 40 via the communication port 63. For example, the communication module 60 sends and receives data (information) between the microprocessor 61 and the memory (ROM, RAM) 62, and various sensors 50-58 in the drive unit 41, steering control unit 42, accelerator pedal 43, brake pedal 44, gear shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, and electronic control unit 49 of the vehicle 40 via the communication port 63.

[0508] 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, it can transmit and receive various types of information between external devices via wireless communication. The communication module 60 can be located either inside or outside the electronic control unit 49. The external device can be, for example, the aforementioned base station 10, user terminal 20, etc. Furthermore, the communication module 60 can be, for example, at least one of the aforementioned base station 10 and user terminal 20 (or it can function as at least one of the base station 10 and user terminal 20).

[0509] The communication module 60 can also wirelessly transmit at least one of the following to an external device: signals from the various sensors 50-58 described above that are input to the electronic control unit 49, information obtained based on these signals, and information based on input from an external source (user) obtained via the information service unit 59. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc., can also be referred to as input units that receive input. For example, the PUSCH transmitted via the communication module 60 can also contain information based on the aforementioned input.

[0510] The communication module 60 receives various information (traffic information, traffic light information, vehicle-to-vehicle information, etc.) sent from external devices and displays it to the information service unit 59 provided by the vehicle. The information service unit 59 can also be referred to as an output unit that outputs information (for example, outputs information to devices such as displays and speakers based on the PDSCH received through the communication module 60 (or data / information decoded from the PDSCH).

[0511] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. The microprocessor 61 can also control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, gear shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, and various sensors 50-58 of the vehicle 40 based on the information stored in the memory 62.

[0512] Furthermore, the base station in this disclosure can also be rewritten as a user terminal. For example, various methods / implementations of this disclosure can be applied to structures where communication between the base station and the user terminal is replaced by communication between multiple user terminals (e.g., also referred to as device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, it can also be configured such that the user terminal 20 has the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be rewritten as terms corresponding to inter-terminal communication (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can also be rewritten as sidelink channel.

[0513] Similarly, the user terminal in this disclosure can also be rewritten as a base station. In this case, it can also be configured such that the base station 10 has the functions of the user terminal 20 described above.

[0514] In this disclosure, operations are assumed to be performed by the base station, and sometimes, depending on the circumstances, by its upper node. Clearly, in a network containing one or more network nodes having a base station, various operations for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (e.g., considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or combinations thereof.

[0515] The various methods / implementations described in this disclosure can be used individually or in combination, and can be switched as needed during execution. Furthermore, the processing procedures, timing sequences, flowcharts, etc., of the various methods / implementations described in this disclosure can be rearranged as long as they do not contradict each other. For example, for the method described in this disclosure, the illustrated order is used to indicate various steps, but the order in which they are indicated is not limited.

[0516] The various methods / implementations described in this disclosure can 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), Futuregeneration radio access (FX), Global System for Mobile Communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE This includes 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-Wideband (UWB)), Bluetooth (registered trademark), systems utilizing other suitable wireless communication methods, and next-generation systems derived from enhancements, modifications, creations, or specifications based on them. Furthermore, multiple systems can be combined (e.g., LTE or LTE-A, combinations with 5G, etc.) for application.

[0517] As used in this disclosure, the term "based on" does not mean "based on only" unless otherwise specified. In other words, the term "based on" means both "based on only" and "based on at least".

[0518] Any reference to an element using the designations "first," "second," etc., as used in this disclosure does not comprehensively limit 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 the first and second elements does not imply that only two elements may be used, or that the first element must take precedence over the second element in some form.

[0519] The term "determining" as used in this disclosure can encompass a wide variety of operations. For example, "determining" can also refer to judging, calculating, computing, processing, deriving, investigating, looking up (search, inquiry) (e.g., searching in a table, database or other data structure), and ascertaining.

[0520] In addition, "judgment (decision)" can also refer to receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, accessing (e.g., accessing data in memory), etc., as situations where "judgment (decision)" is performed.

[0521] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, or comparing are considered as making a "judgment (decision)". That is, "judgment (decision)" can also refer to certain operations as making a "judgment (decision)". In this disclosure, "judgment (decision)" can also be rewritten in relation to the operations described above.

[0522] Furthermore, in this disclosure, "determine / determining" can also be interchanged with "assume / assuming," "expect / expecting," "consider / considering," etc. Additionally, in this disclosure, "not assuming..." can also be interchanged with "assuming not...".

[0523] In this disclosure, "expect" can also be interchanged with "be expected." For example, "expect(s)..." (where "..." can also be expressed using a that clause, an infinitive to, etc.) can be interchanged with "be expected...". "Does not expect..." can also be interchanged with "be not expected...". Furthermore, "An apparatus A is not expected..." can also be interchanged with "Apparatus B other than apparatus A does not expect..." (for example, if apparatus A is a UE, apparatus B can also be a base station).

[0524] The term "maximum transmit power" as used 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 UE maximum transmit power).

[0525] As used in this disclosure, the terms “connected,” “coupled,” or all variations thereof, refer to all direct or indirect connections or combinations between two or more elements, and can include cases where there is one or more intermediate elements between two mutually “connected” or “coupled” elements. The connections or combinations between elements can be physical, logical, or a combination thereof. For example, “connection” can also be rewritten as “access.”

[0526] In this disclosure, when two elements are connected, it is possible to consider using more than one wire, cable, printed electrical connection, etc. to be "connected" or "combined" with each other, and as several non-limiting and non-exclusive examples, to use electromagnetic energy with wavelengths having wireless frequency domain, microwave region, light (both visible and invisible) region to be "connected" or "combined" with each other.

[0527] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other." Additionally, the term can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0528] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," mean inclusive. Furthermore, the term "or" as used in this disclosure does not mean XOR.

[0529] In this disclosure, for example, in cases where articles are added through translation, such as a, an, and the in English, the disclosure may also include cases where the noun following these articles is in a plural form.

[0530] In this disclosure, terms such as "below," "less than," "above," "more than," and "equal to" can be interchanged. Furthermore, in this disclosure, statements meaning "good," "bad," "large," "small," "high," "low," "early," "late," "wide," and "narrow" can be interchanged, not limited to the positive, comparative, and superlative degrees. Additionally, in this disclosure, statements meaning "good," "bad," "large," "small," "high," "low," "early," "late," "wide," and "narrow" can also be interchanged as expressions accompanied by "i" (where i is any integer), not limited to the positive, comparative, and superlative degrees (e.g., "highest" can also be interchanged with "i-th highest").

[0531] In this disclosure, "of", "for", "regarding", "related to", "associated with", etc., can also be rewritten interchangeably.

[0532] In this disclosure, phrases 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 rewritten interchangeably. Furthermore, A and B can be appropriately replaced with nouns, gerunds, or other suitable expressions depending on the context. Additionally, the time difference between A and B can be approximately 0 (immediately following or immediately preceding). Moreover, a time offset can be applied to the time A occurs. For example, "A" can also be rewritten interchangeably with "before / after the time offset of A". This time offset (e.g., more than one symbol / slot) can be predetermined or determined by the UE based on the information it is notified of.

[0533] In this disclosure, timing, moment, time, time instance, arbitrary time unit (e.g., time slot, sub-time slot, symbol, subframe), period, opportunity, resource, etc., can also be overridden.

[0534] The inventions disclosed herein have been described in detail above. However, it will be apparent to those skilled in the art that the inventions disclosed herein are not limited to the embodiments described herein. The description herein is for illustrative purposes only and is not intended to limit the inventions disclosed herein in any way.

Claims

1. A terminal, comprising: The receiving unit receives settings including bitmap parameters representing codebook subset constraints for coherent joint transmission; and The control unit, based on the settings, applies the bitmap parameters to the channel state information (CSI) report and controls the CSI reporting.

2. The terminal as described in claim 1, wherein, The control unit determines whether to use the amplitude-related constraints within the bitmap parameters based on whether the setting represents a single transmit / receive point (TRP).

3. The terminal as described in claim 1, wherein, The bitmap parameters represent amplitude-related constraints for at least one of the transmit / receive points (TRPs), CSI-RS resources, TRP groups, CSI-RS resource groups, and vector groups.

4. The terminal as described in claim 1, wherein, The bitmap parameters indicate whether at least one of the constraints related to the selection of the spatial domain basis and the constraints related to the amplitude is valid.

5. A wireless communication method for a terminal, comprising: The step of receiving settings including bitmap parameters representing constraints on codebook subsets used for coherent joint transmission; and Based on the aforementioned settings, the bitmap parameters are applied to the Channel State Information (CSI) report, and the reporting steps of the CSI are controlled.

6. A base station, comprising: The transmitting unit transmits settings including bitmap parameters representing constraints on codebook subsets used for coherent joint transmission; and The control unit receives the control channel status information report, i.e., the CSI report. The bitmap parameters, based on the settings, are applied in the CSI report.

Images