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 of one or more parameters relating to the number of spatial domain base vectors for a plurality of transmission points; and a control unit that determines, on the basis of the setting, the number of spatial domain base vectors reported to the plurality of transmission points. According to one embodiment of the present disclosure, it is possible to determine an appropriate CSI / codebook for CJT.

Description

Technical Field

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

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized for the purpose of further high-speed data rate, low latency, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) has been standardized for the purpose of further increasing the capacity and sophistication of LTE (Release (Rel.) 8, 9 of the Third Generation Partnership Project (3GPP (registered trademark))).

[0003] LTE's successor systems (also known as the fifth generation mobile communication system (5G), 5G+(plus), the sixth generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.) are also being studied.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the invention

[0007] Problems to be solved by the invention

[0008] In future wireless communication systems (e.g., NR), research is underway to report channel state information (CSI) based on the reception of reference signals. In addition, research is underway to perform DL transmissions from multiple transmission / reception points (multiple Transmission / Reception Points (TRPs) or Multi TRP (MTRP)) or multiple panels (multi-panel) to terminals (user terminals or User Equipment (UE)). In addition, research is underway to perform coherent joint transmission (CJT) using multiple TRPs or multiple panels.

[0009] However, sufficient research has not been conducted on CSI / codebooks used for CJT. If such a method is not clearly defined, there is a concern that communication throughput, communication quality, etc. may deteriorate.

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

[0011] Means for solving problems

[0012] A terminal involved in one embodiment of the present invention comprises: a receiving unit that receives settings of one or more parameters related to the number of spatial domain basis vectors for multiple sending points; and a control unit that determines the number of spatial domain basis vectors reported for the multiple sending points based on the settings.

[0013] Effects of the Invention

[0014] According to one aspect of the present disclosure, it is possible to determine appropriate CSI / codebook for CJT. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

[0021] Figure 7 An example of a combination of Implementation #1 and Implementation #2 is shown.

[0022] Figure 8 An example of the bit map 3 according to the implementation #A1 is shown.

[0023] Fig. 9 Another example of the bitmap 3 according to the implementation #A1 is shown.

[0024] Fig.10 An example of NZC according to implementation #A2 is shown.

[0025] Fig.11 Another example of NZC according to implementation #A is shown.

[0026] Fig.12 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0027] Fig.13 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0028] Fig.14 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0029] Fig.15 This is a diagram showing an example of the hardware configuration of a base station and a user terminal involved in one embodiment.

[0030] Fig.16 This is a diagram showing an example of a vehicle according to an embodiment. DETAILED DESCRIPTION

[0031] (Multiple TRP)

[0032] In NR, one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi TRP (multi TRP (MTRP))) are being studied using one or more panels (multi-panels) to perform DL transmissions to the UE. In addition, the UE is studying the use of one or more panels to perform UL transmissions to one or more TRPs.

[0033] In addition, multiple TRPs may correspond to the same cell identifier (cell identifier (ID)) or different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0034] Multiple TRPs (TRP#1, #2) can also be connected through an ideal / non-ideal backhaul and exchange information, data, etc. Different code words (CW) and different layers can also be sent from each TRP of the multiple TRPs. As a method of sending multiple TRPs, non-coherent joint transmission (NCJT) can also be used.

[0035] In NCJT, for example, TRP1 performs modulation mapping and layer mapping on a first codeword, and uses a first precoding to send a first PDSCH for a first number of layers (e.g., two layers). In addition, TRP2 performs modulation mapping and layer mapping on a second codeword, and uses a second precoding to send a second PDSCH for a second number of layers (e.g., two layers).

[0036] In addition, multiple PDSCHs (multi-PDSCHs) subjected to NCJT can also be defined as partially or completely overlapping in at least one of the time domain and the frequency domain. That is, the first PDSCH from the first TRP and the second PDSCH from the second TRP can also overlap in at least one of the time and frequency resources.

[0037] It can also be assumed that the first PDSCH and the second PDSCH are not in a quasi-co-location (QCL) relationship (not quasi-co-located). The reception of multiple PDSCHs can also be rewritten as not simultaneously receiving PDSCHs of a certain QCL type (eg, QCL type D).

[0038] Multiple PDSCHs from multiple TRPs (also referred to as multiple PDSCHs) can also be scheduled using one DCI (single DCI (S-DCI), single PDCCH) (single-master mode). One DCI can also be sent from one TRP of multiple TRPs. Multiple PDSCHs from multiple TRPs can also be scheduled separately using multiple DCIs (multiple DCIs (M-DCI), multiple PDCCHs (multiplePDCCH)) (multiple-master mode). Multiple DCIs can also be sent separately from multiple TRPs. It can also be imagined that the UE sends separate CSI reports (CSI reports) related to each TRP for different TRPs. Such CSI feedback can also be referred to as separate feedback, separate CSI feedback, etc. In the present disclosure, "separate" can also be rewritten with "independent".

[0039] In addition, CSI feedback that sends CSI reports related to both TRPs to one TRP may also be used. Such CSI feedback may also be referred to as joint feedback, joint CSI feedback, etc.

[0040] For example, in the case of separate feedback, the UE is configured to use a certain PUCCH (PUCCH1) to send a CSI report for TRP#1 for TRP#1, and use another PUCCH (PUCCH2) to send a CSI report for TRP#2 for TRP#2. In the case of joint feedback, for TRP#1 or TRP#2, the UE sends a CSI report for TRP#1 and a CSI report for TRP#2.

[0041] Based on such a multi-TRP scenario, more flexible transmission control using channels of good quality can be performed.

[0042] (CSI report or CSI reporting)

[0043] In Rel.15NR, a terminal (also referred to as a user terminal, user equipment (UE), etc.) generates (also referred to as determining, calculating, estimating, measuring, etc.) channel state information (CSI) based on a reference signal (RS) (or resources used for the RS), and sends (also referred to as reporting, feedback, etc.) the generated CSI to a network (e.g., a base station). The CSI may be sent to a base station using, for example, an uplink control channel (e.g., a physical uplink control channel (Physical Uplink Control Channel (PUCCH))) or an uplink shared channel (e.g., a physical uplink shared channel (Physical Uplink Shared Channel (PUSCH))).

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

[0045] The CSI-RS may also include at least one of a non-zero power (NZP) CSI-RS and a CSI-Interference Management (CSI-IM). The SS / PBCH block is a block including the SS and the PBCH (and the corresponding DMRS), and may also be referred to as an SS block (SSB), etc. In addition, the SS may also include at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

[0046] In addition, CSI may also include at least one of a channel quality indicator (Channel Quality Indicator (CQI)), a precoding matrix indicator (Precoding Matrix Indicator (PMI)), a CSI-RS resource indicator (CSI-RSResource Indicator (CRI)), a SS / PBCH block resource indicator (SS / PBCH Block Resource Indicator (SSBRI)), a layer indicator (Layer Indicator (LI)), a rank indicator (Rank Indicator (RI)), L1-RSRP (reference signal received power in layer 1 (layer 1 reference signal received power (Layer 1 Reference Signal Received Power))), L1-RSRQ (reference signal received quality (Reference Signal Received Quality)), L1-SINR (signal to interference plus noise ratio (Signal to Interference plus Noise Ratio)), L1-SNR (signal to noise ratio (Signal to Noise Ratio)), etc.

[0047] The UE may also receive information related to CSI reporting (report configuration information) and control CSI reporting based on the report configuration information. The report configuration information may also be, for example, "CSI-ReportConfig" of the information element (IE) of the Radio Resource Control (RRC). In addition, in the present disclosure, the RRC IE may also be mutually rewritten with RRC parameters, high-layer parameters, etc.

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

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

[0050] Information on one or more amounts (quantities) of CSI to be reported (one or more CSI parameters) (reporting quantity information, for example, "reportQuantity" of RRC IE).

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

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

[0053] For example, the report type information may also represent (indicate) a periodic CSI (P-CSI) report, an aperiodic CSI (A-CSI) report, or a semi-permanent (semi-persistent, semi-persistent (Semi-Persistent)) CSI (Semi-Persistent CSI (SP-CSI)) report.

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

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

[0056] In addition, the frequency domain information can also represent the frequency granularity of the CSI report. The frequency granularity may also include, for example, a wideband and a subband. The wideband is the entire CSI reporting band (entire CSI reporting band). For example, the wideband may be the entirety of a certain (certain) carrier (component carrier (CC), cell, serving cell), or the entirety of the bandwidth part (Bandwidth part (BWP)) within a certain carrier. The wideband may also be referred to as the CSI reporting band, the entire CSI reporting band, etc.

[0057] In addition, a subband is a part of a wideband and may be composed of one or more resource blocks (Resource Block (RB) or Physical Resource Block (PRB)). The size of a subband may also be determined according to the size of a BWP (the number of PRBs).

[0058] The frequency domain information may also indicate which PMI of the wideband or subband is reported (the frequency domain information may also be included in the "pmi-FormatIndicator" of the RRC IE used in the determination of either the wideband PMI report or the subband PMI report, for example). The UE may also determine the frequency granularity of the CSI report (i.e., either the wideband PMI report or the subband PMI report) based on at least one of the above-mentioned reporting amount information and the frequency domain information.

[0059] In the case where wideband PMI reporting is set (determined), one wideband PMI may also be reported for the entire CSI reporting band. On the other hand, in the case where subband PMI reporting is set, a single wideband indication i1 may be reported for the entire CSI reporting band, or a subband indication i2 (e.g., a subband indication for each subband) may be reported for each of more than one subbands within the entire CSI reporting band.

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

[0061] The PMI may also represent a precoder matrix (also referred to as a precoder for short) that the UE considers suitable for downlink (downlink (DL)) transmission to the UE. Each value of the PMI may also correspond to a precoder matrix. A set of PMI values ​​may also correspond to a set of different precoder matrices and is referred to as a precoder codebook (also referred to as a codebook for short).

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

[0063] The above codebook may also include a codebook for type 1 CSI (also referred to as type 1 codebook, etc.) and a codebook for type 2 CSI (also referred to 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 also be specified.

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

[0065] The uplink control information (UCI) type may also include at least one of a hybrid automatic repeat request acknowledgment (HARQ-ACK), a scheduling request (SR), and CSI. UCI may be carried by either PUCCH or PUSCH.

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

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

[0068] In Rel.15NR, the UE is configured with N (N≥1) report settings of CSI report settings and M (M≥1) resource settings of CSI resource settings through the higher layer. For example, the CSI report setting (CSI-ReportConfig) includes 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), report quantity (reportQuantity), etc. The resource settings for channel measurement, the CSI-IM resource settings for interference, and the NZP-CSI-RS settings for interference are associated with the CSI resource settings (CSI-ResourceConfig, CSI-ResourceConfigId), respectively. The CSI resource setting includes a list of CSI-RS resource sets (csi-RS-ResourceSetList, for example, an NZP-CSI-RS resource set or a CSI-IM resource set).

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

[0070] (Codebook Setting)

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

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

[0073] The codebook parameters include parameters (Restriction) related to codebook subset restriction (CBSR). The CBSR setting is a bit that indicates which PMI report is allowed ("1") or which PMI report is not allowed ("0") for the precoder associated with the CBSR bit. One bit of the CBSR bitmap corresponds to one codebook index / antenna port.

[0074] (CSI report settings)

[0075] In addition to the codebook configuration (CodebookConfig), the CSI report configuration (CSI-ReportConfig) of Rel.16 also includes CSI-RS resources for channel measurement (resourcesForChannelMeasurement(CMR)), CSI-RS resources for interference measurement (csi-IM-ResourcesForInterference(ZP-IMR), nzp-CSI-RS-ResourcesForInterference(NZP-IMR)), etc. The parameters of CSI-ReportConfig except codebookConfig-r16 are also included in the CSI report configuration of Rel.15.

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

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

[0078] <Option 1>

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

[0080] <Option 2>

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

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

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

[0084] Option 1 (X=0): Measurement of CSI of NCJT only.

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

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

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

[0088] (Type 1 codebook)

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

[0090] For Rel.15 type 1 single panel CSI, the UE is set to type 1 single panel ('typeI-SinglePanel') in the higher layer parameters of the codebook type (subType in type1 in codebookType in CodebookConfig). If the number of layers v∈{2,3,4} is not, the PMI value is related to the three codebook indices i 1,1 ,i 1,2 , i2 corresponds. If the number of layers is v∈{2,3,4}, the PMI value corresponds to the 4 codebook indexes i 1,1 ,i 1,2 ,i 1,3 , i2 corresponds. If the number of layers is not v∈{2,3,4}, the composite codebook index i1=[i 1,1 ,i 1,2 If the number of layers is v∈{2,3,4}, the composite codebook index i1=[i 1,1 ,i 1,2 ,i 1,3 ].

[0091] For the number of CSI antenna ports P CSI-RS The supported (N1, N2) and (O1, O2) settings (combinations of values) are specified in the specification. (N1, N2) represents the number of antenna elements in two dimensions and is set by n1-n2 in moreThanTwo in nrOfAntennaPorts in typeI-SinglePanel. (O1, O2) is the two-dimensional oversampling factor. i corresponding to the horizontal beam 1,1 is {0,1,...,N1O1-1}. i corresponding to the vertical beam 1,2 is {0,1,...,N2O2-1}. i2 is {0,1,2,3}. For codebook mode (codebookMode) = 1, use antenna ports 3000 to 2999+P CSI-RS The matrix used in the 1-layer CSI report codebook is W_i 1,1 ,i 1,2 ,i2^(1). Here, W l,m,n (1) Given by the following formula.

[0092]

[0093] Compared with the type 1 single panel, for Rel.15 type 1 multi-panel CSI, in addition to N1 and N2, the number of panels N is also set. gAs inter-panel phase matching (inter-panel co-phasing, inter-panel phase compensation, inter-panel phase compensation, inter-panel phase adjustment / phase difference), it is additionally reported. 1,4 For each panel, the same SD beam is selected (precoding matrix W l ), only inter-panel phase matching is reported additionally.

[0094] For the number of CSI antenna ports P CSI-RS , the specification specifies the supported (N g ,N1,N2) and (O1,O2) settings (combination of values). (N1,N2) is set by ng-n1-n2 in typeI-MultiPanel. 1,1 is {0,1,...,N1O1-1}. 1,2 is {0,1,...,N2O2-1}. For q=1,...,N g -1,i 1,4,q = {0,1,2,3}. i2 = {0,1,2,3}. For codebook mode (codebookMode) = 1, use antenna ports 3000 to 2999+P CSI-RS The matrix used in the 1-layer CSI report codebook is W_i 1,1 ,i 1,2 ,i 1,4 ,i2^(1). Here, W l,m,p,n (1) =W l,m,p,n ^1,N g ,1.

[0095] For N g =W_l,m,p,n^1,N of {2,4} g ,1 and W_l,m,p,n^2,N g ,1(for the first layer, N g =2, codeBookMode = 1 l,m,p,n 1,2,1 , for the second layer, N g =2, codeBookMode = 1 l,m,p,n 2,2,1 , for the first layer, N g =4, codeBookMode = 1 l,m,p,n 1,4,1 , for the second layer, N g =4, codeBookMode = 1 l,m,p,n2,4,1 ) is given by the following formula.

[0096]

[0097] here, For N g =2, p ＝ p1, for N g =4, p=[p1,p2,p3]. represents inter-panel co-phasing. For panels 0, 1, 2, and 3, the same beam is selected (SD beam matrix, precoding matrix W l ), represents the phase compensation of panel 1 relative to panel 0, represents the phase compensation of panel 2 relative to panel 0, Represents the phase compensation of panel 3 relative to panel 0.

[0098] (Type 2 codebook)

[0099] In the present disclosure, a matrix Z of X rows and Y columns is sometimes expressed as Z(X×Y).

[0100] Regarding the type 2 CSI of Rel.15, for a given layer k, the generation of the precoding vector per subband (SB-wise) is based on the following equation.

[0101] W k (N t × N3)=W1W 2,k (Y1)

[0102] N t is the number of ports. N3 is the total number (number of subbands) of precoding matrices (precoders) represented by PMI. t ×2L) is a matrix (SD beam matrix) composed of L∈{2,4} (oversampled) spatial domain (SD) two-dimensional (2D) DFT vectors (SD beams, 2D-DFT vectors). L is the number of beams. For example, L=2 SD 2D-DFT vectors are b i ,b j .W 2,k (2L×N3) is a matrix (LC coefficient matrix) composed of linear combination coefficients (linear combination (LC) coefficients, subband complex LC coefficients, and combination coefficients) for layer k. 2,krepresents the beam selection and the phase matching (co-phasing) between the two polarizations. 2,k c i ,c j For example, the channel vector h is obtained by linearly combining L = 2 SD 2D-DFT vectors c i b i ,+c j b j Approximation. The feedback overhead is mainly composed of the LC coefficient matrix W 2,k In addition, the type 2 CSI of Rel.15 only supports ranks 1 and 2.

[0103] In type 2 CSI, the channel (channel matrix) for a certain user is represented by a linear combination of two polarizations and L beams (L 2D-DFT vectors). Type 2 CSI of Rel.15 supports ranks 1 and 2.

[0104] (Extension of Type 2 codebook)

[0105] The type 2 CSI (enhanced type 2 codebook) of Rel.16 reduces the W 2,k The associated overhead. In addition to supporting ranks 1 and 2, the type 2 CSI of Rel.16 also supports ranks 3 and 4.

[0106] In the type 2 CSI of Rel.16, for a given layer k, the UE reports information based on the following formula.

[0107] W k =W1W ～ k W f,k H (Y2)

[0108] W 2,k By W ～ k W f,k H Approximation. Matrix W ～ It can also be expressed by adding ~ (wavy line) to W. ～ k It can also be expressed as W ～ 2,k Matrix W f,k H It is W f,k The adjoint matrix of f,k The conjugate transpose of is obtained.

[0109] For CSI reporting, the UE can also be configured with one subband size within the two subband sizes. This subband (CQI subband) can also be defined as N PRB SB The number of PMI subbands per CQI subband, R, is set by the RRC IE (numberOfPMI-SubbandsPerCQI-Subband). R controls the total number of precoding matrices N3 represented by the PMI and is a function of the number of subbands set in csi-ReportingBand, the subband size set by subbandSize, and the total number of PRBs in the BWP.

[0110] W1(N t ×2L) is a matrix composed of multiple (oversampled) spatial domain (SD) 2D-DFT (vectors, beams). For this matrix, multiple indices of the two-dimensional discrete Fourier transform (2D-DFT) vectors and the two-dimensional oversampling factor are reported. The spatial domain response / distribution represented by the SD 2D-DFT vector can also be called an SD beam.

[0111] W ～ k (2L×M v ) is a matrix of LC coefficients. For this matrix, at most K0 non-zero coefficients (non-zero coefficients (NZCs)), LC coefficients of non-zero amplitude) are reported. The report consists of two parts: a bitmap capturing the NZC positions and a quantized NZC.

[0112] W f,k (N3×M v ) is a matrix consisting of multiple frequency domain (FD) bases (vectors) for layer k. There are M v FD basis (FD DFT basis). In the case of N3>19, select M from the intermediate subset (InS) of size N3' (<N3) v DFT. In the case of N3≤19, log2(C(N3-1,M v -1)) bits. Here, C(N3-1,M v -1) means to select M from N3-1 v-1 combination (combinatorial coefficient C(x,y)), also known as binomial coefficients. The frequency domain response / distribution (frequency response) represented by the linear combination of the FD basis vector and the LC coefficients can also be called an FD beam. An FD beam can also correspond to a delay profile (time response).

[0113] The subset of the FD basis is given by {f1,...,f M_v Here, f i is the i-th FD basis for the k-th (K=1,...,v) layer, i∈{1,...,M v}. The PMI subband size is given by the CQI subband size / R, R∈{1,2}. The number of FD bases M for a given rank v v By ceil(p v ×N3 / R). The number of FD bases is the same for all layers k∈{1,2,3,4}. v Through high-level settings.

[0114] Matrix W 2,k Each row of represents the channel frequency response of a specific SD beam. In the case where the SD beam has high directivity, the channel tap of each beam is limited (the power delay distribution becomes sparse in the time domain). As a result, the channel frequency response of each SD beam has a high correlation (close to flat in the frequency domain). In this case, the channel frequency response can be approximated by a linear combination of a small number of FD bases. For example, in M v = 2, use the FD basis f2, f q and LC coefficient d1 0 ,d2 0 , the frequency response associated with SD beam b0 is transmitted through d1 0 f2+,d2 0 f q To approximate.

[0115] Select M v FD basis to obtain the highest gain. By setting M v <<N3, W~ k The cost is W 2,k The overhead is much smaller. vAll or part of the FD basis is used for the approximation of the frequency response of each SD beam. A bitmap is used to report only the selected FD basis for each SD beam. If the bitmap is not reported, all FD basis are selected for each SD beam. In this case, NZCs of all FD basis are reported for each SD beam. The maximum number of NZCs in one layer is K. k NZ ≤K0=ceil(β×2LM v ), the maximum number of NZCs across all layers K NZ ≤2K0=ceil(β×2LM v ). β is set by high level.

[0116] W ～ k The reported LC coefficients (complex coefficients) are represented by their quantized amplitude and phase.

[0117] [Amplitude Quantization]

[0118] The polarization specific reference amplitude is used Figure 1 Table (amplitude coefficient indicator i 2,3,l Mapping of multiple elements: From element k l,p (1) To the amplitude coefficient p l,p (1) All other coefficients are quantized using Figure 2 Table (amplitude coefficient indicator i 2,4,l Mapping of multiple elements: From element k l,i,f (2) To the amplitude coefficient p l,i,f (2) 8-level quantization of the mapping).

[0119] [Phase Quantization]

[0120] All coefficients are quantized using 16-PSK. For example, Here, c l,i For the phase value to be associated Phase coefficient reported by the UE (using 4 bits).

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

[0122] In enhanced type 2 CSI feedback, CSI part 1 contains RI, CQI and an indication of the total number of non-zero amplitudes (NZC) across multiple layers for enhanced type 2 CSI. The fields of part 1 are coded separately. CSI part 2 contains the PMI for enhanced type 2 CSI. Parts 1 and 2 are coded separately. CSI part 2 (PMI) contains the oversampling factor, the index of the 2D-DFT basis, the index of the initial DFT basis (start offset) of the selected DFT window, and the PMI of the selected DFT window. initial , a DFT basis selected for each layer, the NZC (amplitude and phase) of each layer, the strongest coefficient indicator (SCI) of each layer, and at least one of the amplitude of the strongest coefficient for each layer / each polarization.

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

[0124] ·i 1,1 : Oversampling factor.

[0125] ·i 1,2 : Multiple indices of a 2D-DFT basis.

[0126] ·i 1,5 : Index of the initial DFT basis (starting offset) of the selected DFT window M initial .

[0127] ·i 1,6,k : The DFT basis selected for the kth layer.

[0128] ·i 1,7,k : Bitmap for layer k.

[0129] ·i 1,8,k : The strongest (strongest, maximum strength) coefficient indicator (SCI) for the kth layer.

[0130] ·i 2,3,k: The amplitude of the strongest coefficient (for both polarizations) of the kth layer.

[0131] ·i 2,4,k : The amplitude of the reported coefficients at the kth level.

[0132] ·i 2,5,k : The phase of the reported coefficients at the kth layer.

[0133] i 1,5 and 1,6,k PMI index for DFT basis reporting. Reported only when N3>19 1,5 .

[0134] As a grouping of CSI part 2, for a given CSI report, the PMI information is summarized into 3 groups (from group 0 to 2). This is important in the case of CSI omission. Index i 2,4,l 、i 2,5,l 、i 1,7,l Each element reported is associated with a specific priority rule. Groups 0 to 2 follow the following.

[0135] Group 0: index i 1,1 、i 1,2 、i 1,8,l (l=1,...,v).

[0136] Group 1: Index i (when reported) 1,5 , index i (when reported) 1,6,l 、i 1,7,l The highest (highest) v2LM v -floor(K NZ / 2) priority elements, i 2,3,l 、i 2,4,l The highest ceil (K NZ / 2)-v priority elements, i 2,5,l The highest ceil (K NZ / 2)-v priority elements (l=1,...,v).

[0137] ·Group 2: i 1,7,l The lowest floor (K NZ / 2) priority elements, i 2,4,l The lowest floor (K NZ / 2) priority elements, i 2,5,l The lowest floor (K NZ / 2) priority elements (l=1,...,v).

[0138] In type 1 CSI, an SD beam represented by an SD DFT vector is transmitted to the UE. In type 2 CSI, L SD beams are linearly combined and transmitted to the UE. Each SD beam can be associated with multiple FD beams. For the corresponding SD beam, the channel frequency response can be obtained by linearly combining these FD basis vectors. The channel frequency response corresponds to the power delay profile.

[0139] The PMI of the enhanced type 2 codebook is represented by the information fields X1 and X2. 1,1 、i 1,2 、i 1,8,1 、i 1,8,2 、i 1,8,3 、i 1,8,4 The bit width of , is given by Figure 3. 1,1 、i 1,2 It is an indicator of SD base. 1,8,1 、i 1,8,2 、i 1,8,3 、i 1,8,4 It is the index of SCI of each layer. 2,3,1 、i 2,3,2 、i 2,3,3 、i 2,3,4 、i 1,5 、i 1,6,1 、i 1,6,2 、i 1,6,3 、i 1,6,4 、{i 2,4,l} l＝1...v 、{i 2,5,l} l＝1...v 、{i 2,7,l} l＝1...v The bit width of , is given by Figure 4. 2,3,1 、i 2,3,2 、i 2,3,3 、i 2,3,4 is the amplitude of the SCI of each layer. 1,5 It is the window of FD substrate. 1,6,1 、i 1,6,2 、i 1,6,3 、i 1,6,4 is the selected FD basis for each layer. 2,4,l} l＝1...v is the amplitude of other coefficients (other than SCI) of each layer. 2,5,l} l＝1...v is the phase of other coefficients (other than SCI) of each layer. 2,7,l} l＝1...v Is the bitmap used for NZC.

[0140] (Type 2 port selection codebook / enhancement / further enhancement)

[0141] In the type 2 port selection (PS) CSI (type 2PS codebook) of Rel.15, 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 the K beamformed CSI-RS ports to send CSI-RS. The UE selects / identifies the best L (≤K) CSI-RS ports for each polarization and reports their indices in W1. Type 2PS CSI of Rel.15 supports ranks 1 and 2.

[0142] The operation of the Type 2 PS CSI (enhanced Type 2 PS codebook) of Rel. 16 is the same as that of the Type 2 CSI of Rel. 16 except for the selection of the SD beam. The Type 2 PS CSI of Rel. 15 supports ranks 1 to 4.

[0143] For layer k∈{1,2,3,4}, the subband (SB)-wise precoder generation is given by the following equation.

[0144] W k (N t ×N3)=QW1W ～ k W f,k H (Y3)

[0145] Here, Q(N t ×K) represents K SD beams used for CSI-RS beamforming. W1(K×2L) is a block diagonal matrix. ～ k (2L×M) is the LC coefficient matrix. W f,k (N3×M) is composed of N3 DFT basis vectors (FD basis vectors). K is set by a higher layer. L is set by a higher layer. P CSI-RS ∈{4,8,12,16,24,32}. CSI-RS >4, L∈{2,3,4}.

[0146] In the type 2 PS CSI of Rel.15 / 16, each CSI-RS port #i is associated with the SD beam (b i ) to associate ( Figure 3A as well as Figure 3B ).

[0147] The type 2 PS CSI of Rel. 16, similar to the type 2 CSI of Rel. 16, reduces the overhead compared to the type 2 PS CSI of Rel. 15 by reducing the number of FD bases from N3 to M v (M v (< N3).

[0148] In the type 2 port selection CSI / codebook of Rel. 17 (further enhanced (continuously enhanced, further enhanced (further enhanced)) type 2 port selection codebook), for each CSI-RS port #i, instead of the SD beam, it is associated with the SD-FD beam pair (SD beam b i and FD beam f i,j pair (j is the frequency index)). Figure 4A And Figure 4B ). In this example, ports 3 and 4 are associated with the same SD beam and different FD beams.

[0149] 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 through delayed pre-compensation (delay pre-compensation).

[0150] The main scenario of the type 2 port selection codebook of Rel. 17 is FDD. The channel reciprocity based on SRS measurement is not perfect (the angles of the UL beam and the DL beam may be different, the UL frequency and the DL frequency are different in FDD, and the effective antenna spacing in the UL frequency and the DL frequency is different). However, the base station can obtain / select some information (dominant angles and delays (SD beam and FD beam)). In addition to CSI reporting, SRS measurement in the base station is also used, so that the base station can obtain the CSI for the decision of the DL MIMO precoder. In this case, in order to reduce the CSI overhead, some CSI reports can also be omitted.

[0151] In the type 2 PS CSI of Rel. 17, each CSI-RS port is beamformed using the SD beam and the FD base vector. Each port is associated with an SD-FD pair.

[0152] For a given layer k, it can also be reported by the UE based on the information of the following formula.

[0153] W k (K×N3)=W1W ～k W f,k H (Y4)

[0154] For W1(K×2L), each matrix block consists of L columns of a K×K identity matrix. The base station sends K beamformed CSI-RS ports. In the type 2PS codebook of Rel.16, each port is associated with an SD beam. In contrast, in the type 2PS codebook of Rel.16, each port is associated with an SD-FD pair. The UE selects L ports out of K and uses them as the PMI (W 1,k ) is reported to the base station.

[0155] W ～ k (2L×M v ) is a matrix consisting of LC coefficients (subband complex LC coefficients) vectors for layer k. A maximum of K0 NZCs are reported. The report consists of two parts: a bitmap that captures the NZC positions and a quantized NZC. In the type 2 PS codebook of Rel.16, the bitmap of the NZC positions is always reported. In contrast, in the type 2 PS codebook of Rel.17, the bitmap can be omitted for specific situations. The specific situation is the situation where the number of reported NZCs is equal to the maximum number K1*M*v (v≤2).

[0156] The precoding matrix indicated by the PMI is determined based on L+M vectors. Here, the number of SD beams (SD basis vectors) is L=K1 / 2, and the number of ports selected from the CSI-RS ports is K1=αP CSI-RS The window size N for selection of the FD basis vector may also be set using a higher level parameter (valueOfN).

[0157] W f,k (N3×M v ) is the M v A matrix consisting of FD basis (FD DFT basis) vectors. v is 1 or 2. The base station can determine W f,k Whether it is enabled (on) or disabled (off) f,k To enable (on) (M v =2), report M v Additional FD basis vectors. f,k To disable (off) (M v =1, W f,k To disable, and M v =1 and W f,k is enabled), the additional FD basis vectors are not reported.v = 2, select / report M from the window size N (N is 2 or 4) set by RRC v FD basis vectors. In Rel.16 W f,k Always reported.

[0158] (Rel.17NCJT CSI)

[0159] Joint transmission (JT) may also mean simultaneous data transmission from multiple points (eg, TRP) to a single UE.

[0160] Rel.17 supports NCJT from two TRPs. PDSCHs from two TRPs can also be precoded and decoded independently. Frequency resources can be non-overlapping, partially overlapping, or fully overlapping. In the event of overlap, the PDSCH from one TRP becomes interference to the PDSCH from other TRPs.

[0161] The applicable scenario is single DCI based MTRP NCJT with type 1 single panel codebook. For NCJTCSI measurement, two CMR groups with channel measurement resources (CMR) from one TRP can be configured in a single CSI-ReportConfig. A CSI reporting mode can be set from two modes.

[0162] Through RRC signaling, CSI-ReportConfig for Rel.17 non-coherent joint transmission (NCJT) CSI sets CMR and CSI reporting mode (csi-ReportMode).

[0163] With K s = Two CMR groups of K1+K2 CMRs are set for the UE. 2≤K s ≤8.K s CMRs correspond to the NZP-CSI-RS resource set for channel measurement. K1 and K2 are the number of CMRs in the two CMR groups. N (N groups) CMR pairs are set by the higher layer by selecting from all possible pairs. Support N = 1, K s =2. N max =2 is an optional function of UE. S,max=X support is an optional function of the UE. Each CMR can include up to 32 CSI-RS ports according to the UE capability. Each CMR is associated with a CRI value.

[0164] The bitmap based on RRC signaling indicates N (N=1, 2) CMR pairs actually used for NCJT measurement by indicating one CMR from each CMR group. The UE uses CMRs in two CMR groups to measure a single TRP CSI for TRP1 and a single TRP CSI for TRP2, and uses N CMR pairs to measure NCJT CSI.

[0165] The UE selects one or more CSIs to be reported based on the mode configured by csi-ReportMode. csi-ReportMode indicates one of the following two modes: Mode 1 and Mode 2.

[0166] Supports at least one of the following modes 1 and 2.

[0167] [Mode 1]

[0168] The UE may 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 with multiple CMRs from different multiple CMR groups. Support of X = 1, 2 is an optional feature of the UE for UEs supporting option 1.

[0169] [Mode 2]

[0170] The UE is configured to report a CSI associated with the best one within the measurement premise of NCJT and single TRP.

[0171] In Mode 1, the UE reports X+1 CSIs as a total, which include X (X=0, 1, 2) single TRP CSIs and one NCJT CSI. In Mode 2, the UE reports one best CSI (one CSI) from all single TRP CSIs and one NCJT CSI.

[0172] In one CSI report, up to two single-TRP CSIs and one NCJT CSI can be reported (mode 1 with X=2). NCJT CSI includes one CRI, two RIs (with one joint RI index), two PMIs, two LIs and one CQI (below 4 layers). Single-TRP CSI is the same as the existing CSI, including one CRI, one RI / PMI / LI, one or two CQIs (below 8 layers, one CQI per CW).

[0173] For the following scenarios, a new mapping order (table) of multiple fields in a CSI report is defined.

[0174] · Mapping order for wideband CSI of mode 1 with X=0. Wideband CSI is supported only for mode 1, NCJTCSI, with X=0.

[0175] Mapping order of CSI part 1 for modes 1 and 2.

[0176] Mapping order of CSI part 2 wideband for modes 1 and 2.

[0177] Mapping order of CSI part 2 subbands for modes 1 and 2.

[0178] (CJT)

[0179] In Rel.18, support for CJT using up to 4 TRPs is being studied. Data from the 4 TRPs can also be coherently precoded and sent to the UE on the same time-frequency resources. For example, channels from 4 TRPs can also be considered, using the same precoding matrix. Coherence can also mean that there is a certain relationship between the phases of multiple received signals. It is also possible to use 4 TRPs joint precoding to improve signal quality, and there can be no interference between the 4 TRPs. The data can also be subject to interference only outside the 4 TRPs.

[0180] In an ideal situation (where 4 TRPs are co-located (considered to be at the same location)), a joint estimation of the aggregated channel matrix H can be performed, and the joint precoding matrix V can be fed back. However, the large scale pathloss of the 4 paths is sometimes significantly different. The joint precoding matrix V based on the constant module codebook is not accurate. In this case, the feedback of each TRP and the coefficients between TRPs can be matched by the current NR type 2 codebook.

[0181] For CJT of up to 4 TRPs in FR1, the selection of the 4 TRPs can also be semi-static. Therefore, the selection and the setting of the 4 CMRs (4 CSI-RS resources) for channel measurement can also be semi-static. Dynamic indication of the 4 TRPs from the list of CSI-RS resources is also possible, but less likely.

[0182] The path losses from the 4 TRPs to the UE are different. Therefore, it is difficult to report only one aggregated CSI representing the joint channel matrix.

[0183] Considering the fallback operation to NCJT (ie, single TRP), also consider the CSI of each TRP (ie, single TRP CSI like NCJT CSI of Rel.17).

[0184] (CJT CSI)

[0185] CSI acquisition for coherent joint transmission (CJT) for FR1 and up to 4 TRPs is being studied, assuming ideal backhaul, synchronization, and the same number of antenna ports across multiple TRPs. Improvements to the type 2 codebook of Rel.16 / 17 are being studied for CJT multi-TRPs for FDD.

[0186] As CSI enhancements for CJT, the following are being studied.

[0187] CMR and IMR for measurement of up to 4 TRPs.

[0188] ·CSI of each TRP along with inter-TRP CSI feedback for x-TRP CJT.

[0189] Inter-TRP CSI: New feedback and codebook for inter-TRP phase matrix / inter-TRP amplitude matrix / inter-TRP matrix (including both amplitude and phase).

[0190] ·Added reportable x-TRP CJT CQI.

[0191] As a multi-TRP CJT CSI, the following are being studied.

[0192] ·Restrictions on the settings of CMR / CSI for each TRP.

[0193] ·CSI / PMI between TRPs (e.g., inter-TRP phase with / without inter-TRP amplitude).

[0194] [Option 1] Independent codebook and feedback in addition to Rel.16 / 17 Type 2 codebook.

[0195] [Option 2] With W k ～ W f,k H / In W k ～ W f,k H W2 of CSI / PMI between TRPs transmitted within. Common / different FD substrates for multiple TRPs.

[0196] As a multi-panel type 2CSI for multi-TRP CJT, the following is being studied.

[0197] · Enhancement of Rel.16 / 17 type 2 codebook and type 2 PS codebook to multiple panels.

[0198] • New antenna settings for type 2 multi-panel codebook.

[0199] W1(SD base) / W for each TRP f (FD base) can be the same or different. k (NZC) can also be different. W1 / W for each TRP f / W k You can select them together or individually. f / W k The design is preferably different scenarios with different options. It can be reported as a separate item or in W k The guidelines used depend on the configuration scenario (e.g., intra-site multiple TRPs or inter-site multiple TRPs).

[0200] For example, the precoding matrix for 4-TRP CJT CSI (codebook) can also be obtained by W1 / W for each TRP. f / W k The W1 for each TRP can be the same or different, and can be selected together or individually. k They can also be different, and can be selected together or individually. f They can be the same or different, and can be selected together or individually.

[0201] In the (Rel.18) type 2 codebook (codebook structure) used for CJT multi-TRP (mTRP), at least one of the following modes (codebook modes) can also be supported.

[0202] [Mode 1]

[0203] SD / FD basis selection per TRP / per TRP group. It allows independent FD basis selection across N TRPs / TRP groups. For example, its codebook structure is given by the following formula. Here, N is the number of TRPs or TRP groups.

[0204]

[0205] [Mode 2]

[0206] SD basis selection for each TRP / each TRP group (port group or resource), and joint / common FD basis selection (across N TRPs / TRP groups). For example, its codebook structure is given by the following formula. Here, N is the number of TRPs or TRP groups.

[0207]

[0208] In these two modes, detailed designs such as parameter combination, basis selection, TRP (group) selection, reference amplitude, and W2 quantization method can also be shared.

[0209] (question)

[0210] The maximum number of NZCs in W2 and the W f The number of FD basis vectors in the UE is set by M. However, the setting of the number of SD basis vectors and the selection of SD basis vectors based on the UE are not yet clear. If these studies are insufficient, there is a concern that communication throughput / communication quality may be reduced.

[0211] Therefore, the inventors of the present invention have conceived a method for setting / determining / reporting related to CJT CSI.

[0212] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, each of the following embodiments (for example, each case) may be used alone or in combination of at least two.

[0213] In the present disclosure, "A / B" and "at least one of A and B" may be replaced with each other. In addition, in the present disclosure, "A / B / C" may also mean "at least one of A, B, and C".

[0214] In the present disclosure, activate, deactivate, indicate (or specify (indicate)), select, configure, update, determine, etc. may also be mutually rewritten. In the present disclosure, support, control, controllable, operate, and can operate, etc. may also be mutually rewritten.

[0215] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, high-layer parameters, information elements (IE), settings, etc. can also be overwritten with each other. In the present disclosure, Medium Access Control (MAC) control elements (MAC Control Element (CE)), update commands, activation / deactivation commands, etc. can also be overwritten with each other.

[0216] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0217] In the present disclosure, MAC signaling may also use, for example, MAC Control Element (MACCE), MAC Protocol Data Unit (MAC Protocol Data Unit (PDU)), etc. Broadcast information may also be, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

[0218] In the present disclosure, the physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI)), etc.

[0219] In the present disclosure, index, identifier (ID), indicator, resource ID, etc. may also be mutually overwritten. In the present disclosure, sequence, list, set, group, cluster, subset, etc. may also be mutually overwritten.

[0220] In the present disclosure, panel, panel group, beam, beam group, precoder, uplink (UL) transmission entity, transmission / reception point (TRP), base station, spatial relation information (SRI), spatial relation, SRS resource indicator (SRI), control resource set (CORESET), physical downlink shared channel (PDSCH), codeword (CW), transport block (TB), reference signal (RS), antenna port (e.g., demodulation reference signal (DMRS)) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relation group, code division multiplexing (CDM)) group, reference signal group, CORESET group, physical uplink control ... Channel (PUCCH)) group, PUCCH resource group), resources (for example, reference signal resources, SRS resources), resource sets (for example, reference signal resource sets), CORESET pool, downlink transmission configuration indication state (Transmission Configuration Indication state (TCI state)) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state (unified TCI state), common TCI state (common TCI state), Quasi-Co-Location (Quasi-Co-Location (QCL)), QCL assumptions, etc. can also be rewritten with each other.

[0221] In the present disclosure, “having the ability to…” can also be rephrased with “the ability to support / report…”.

[0222] In the present disclosure, panel, base station (gNB) panel, TRP, transmission point, TCI status, reference signal, network (NW), base station, and gNB can also be rewritten mutually.

[0223] In the present disclosure, beam, SD beam, SD basis, SD basis vector, and SD 2D-DFT vector may be replaced with each other. In the present disclosure, L, 2L, the number of SD beams, the number of beams, and the number of SD 2D-DFT vectors may be replaced with each other.

[0224] In the present disclosure, FD basis, FD basis vector, FD DFT basis, DFT basis, f i , FD beam, FD vector, FDDFT basis vector, and DFT basis vector can also be rewritten mutually.

[0225] In the present disclosure, coefficients, LC coefficients, combination coefficients, subband complex LC coefficients, combination coefficient matrices, amplitude and phase, amplitude coefficients and phase coefficients may also be mutually replaced. In the present disclosure, NZC, non-zero coefficients, non-zero LC coefficients, non-zero amplitude coefficients, and complex coefficients may also be mutually replaced.

[0226] In the present disclosure, co-phasing, phase matching, phase compensation, phase adjustment, phase difference, and phase relationship may also be replaced by each other. In the present disclosure, co-amplitude, amplitude compensation, amplitude adjustment, amplitude ratio, and amplitude relationship may also be replaced by each other. In the present disclosure, difference, ratio, and relative value may also be replaced by each other.

[0227] In the present disclosure, layer k and layer l may also be replaced with each other.

[0228] In the present disclosure, size, length, and number can also be interchanged.

[0229] (Wireless Communication Method)

[0230] In each embodiment, TRP, CMR, NZP-CSI-RS resources, and CRI may also be mutually overwritten. In each embodiment, the group / set of TRP, the group / set of CMR, the group / set of NZP-CSI-RS resources, and the group / set of CRI may also be mutually overwritten.

[0231] In each embodiment, X TRPs, X-TRPs, X panels, and Ng panels may be replaced with each other. In each embodiment, CJTs using X TRPs, CJTs using X panels, and X-TRP CJTs may be replaced with each other.

[0232] In various embodiments, the reference CSI, the CSI for the reference TRP, and the first reported CSI may also override each other. In various embodiments, the reference TRP, the CSI corresponding to the reference CSI, the TRP corresponding to the first reported CSI, and the CSI-RS resource / CMR / CMR group / CSI-RS resource set corresponding to the first reported CSI may also override each other. In various embodiments, the TRP, CSI-RS resource, CMR, CMR group, and CSI-RS resource set may also override each other.

[0233] In each embodiment, multiple TRPs, multiple panels, intra-site multiple TRPs, and inter-site multiple TRPs can also rewrite each other.

[0234] In each embodiment, inter-TRP, inter-panel, inter-TRP difference, and inter-TRP comparison can also be rewritten.

[0235] In various embodiments, the inter-TRP CSI, inter-TRP CJT CSI, inter-panel CSI, the CSI of other TRPs relative to the CSI of the reference TRP, and the CSI of other TRPs relative to the CSI of the reference panel may also overwrite each other. In various embodiments, the per-TRP CSI and the per-panel CSI may also overwrite each other.

[0236] In various embodiments, the inter-TRP phase index and the inter-TRP phase matching (phasing) index may also be overwritten with each other. In various embodiments, the inter-TRP index and the inter-TRP coefficient (coefficient) index may also be overwritten with each other. In various embodiments, the inter-TRP phase (phase) matrix and the inter-TRP phase matching (phasing) matrix may also be overwritten with each other. In various embodiments, the inter-TRP matrix and the inter-TRP coefficient (coefficient) matrix may also be overwritten with each other. In various embodiments, the inter-TRP phase (phase) codebook and the inter-TRP phase matching (phasing) codebook may also be overwritten with each other. In various embodiments, the inter-TRP codebook and the inter-TRP coefficient (coefficient) codebook may also be overwritten with each other.

[0237] In various embodiments, the report / content of CSI may be applied to both subband report and wideband report.

[0238] In the example of CSI in the figure of each embodiment, the CSI for X TRPs may also include the CSI from the first TRP to the CSI of the X-th TRP. i Line (SD beam) and M i The number / position of NZCs is represented by a matrix of columns (FD basis). i It can be a value M common to X TRPs or a value unique to each TRP.

[0239] In each embodiment, codebook parameter settings, parameter combinations, parameters, parameters related to the number of SD basis vectors, one or more parameters related to the number of SD basis vectors for multiple transmission points, LL, LL for TRP#i i , LL common to multiple TRPs, LL across multiple TRPs, multiple parameter LLs corresponding to multiple TRP#i (i=1, 2, ...) i They can also rewrite each other.

[0240] In the Rel.16 (enhanced) type 2 codebook, L, β, p v The value of is determined by the high-level parameter paramCombination-r16 (codebook parameter setting). Figure 5 An example of parameter combination for Rel.16 type 2 codebook is shown. In Rel.17 (further enhanced) type 2 port selection codebook, the values ​​of α, M, and β are determined by the higher layer parameter paramCombination-r17 (codebook parameter setting). Figure 6 An example of parameter combination for Rel.17 type 2 port selection codebook is shown.

[0241] In the enhancement of the codebook for CJT, L and α may also be represented by a new parameter (eg, LL) (or may be replaced by a new parameter).

[0242] <Implementation method #1>

[0243] This embodiment relates to the setting related to the number of SD basis vectors. The number of SD basis vectors can also be set by a parameter in paramCombination (e.g., paramCombination-rX, where X can also be greater than 18). For example, the parameter can be LL or other parameters. The setting of the number of SD basis vectors can also follow at least one of the following options / variants.

[0244] Option 1

[0245] To set a different number of SD basis vectors for each TRP / TRP group, use either of the following options 1a and 1b.

[0246] [Option 1a]

[0247] A separate paramCombination is set for each TRP / TRP group. Alternatively, different values ​​of the parameter combination (paramCombination) may be set for each TRP / TRP group.

[0248] [Option 1b]

[0249] A separate LL is set for each TRP / TRP group. Alternatively, different LL values ​​may be set for each TRP / TRP group. Parameters other than LL in paramCombination may be values ​​for each TRP, values ​​common to multiple TRPs, values ​​for each TRP group, or values ​​common to multiple TRP groups.

[0250] Option 2

[0251] To set the same number of SD basis vectors for all TRPs / TRP groups, use either of the following options 2a and 2b.

[0252] [Option 2a]

[0253] A common paramCombination is set for all TRPs / TRP groups.

[0254] [Option 2b]

[0255] A common LL is set for all TRPs / TRP groups. For example, a common LL may be set for TRP#1 / #2 / #3 / #4. Parameters other than LL in paramCombination may be values ​​for each TRP, values ​​common to multiple TRPs, values ​​for each TRP group, or values ​​common to multiple TRP groups.

[0256] Option 3

[0257] The total number of SD basis vectors for all TRPs / TRP groups is set via paramCombination or LL.

[0258] Option 3 may also be combined with Option 1 / 2 in the case where the number of SD basis vectors set in Option 1 / 2 is not the actual number of SD basis vectors reported but the maximum number of SD basis vectors. For example, in the case where the UE determines the actual number of SD basis vectors per TRP, the UE may also regard the value set by Option 1 / 2 as a limit on the maximum number of each TRP / TRP group.

[0259] Variation

[0260] For example, different options may be set / used for different codebook modes.

[0261] According to this embodiment, the UE can be appropriately set the number of SD basis vectors.

[0262] <Implementation method #2>

[0263] This embodiment relates to the selection of SD basis vectors based on the UE. In this embodiment, the set number can also be represented by the setting related to the number of SD basis vectors in embodiment #1. The UE can also follow at least one of the following options / variants.

[0264] Option 1

[0265] The UE follows the number LL set for the selection and reporting of the SD basis vector for each TRP#i. i .

[0266] This option may also be applied to option 1 / 2 of implementation #1. For example, when LL1=4, LL2=2, LL3=1, and LL4=1, the UE may report 4 SD basis vectors for TRP#1, 2 SD basis vectors for TRP#2, 1 SD basis vector for TRP#3, and 1 SD basis vector for TRP#4.

[0267] For option 3 of implementation #1, this option may also require the following enhancements.

[0268] [Enhancement]

[0269] The UE needs to determine the number of SD basis vectors selected for each TRP / TRP group. Furthermore, the UE can report the number of SD basis vectors selected for each TRP / TRP group, or report the association between each SD basis vector and the ID of a TRP / TRP group. For example, when LL=6 (the total number of SD basis vectors for all TRPs), the UE reports 2 SD basis vectors for TRP#1, 2 SD basis vectors for TRP#2, 1 SD basis vector for TRP#3, and 1 SD basis vector for TRP#4.

[0270] Option 2

[0271] The set number may also be the maximum number LL of SD basis vectors, and the UE may select / report less than LL SD basis vectors. Alternatively, the UE needs to decide the number of SD basis vectors selected for each TRP / TRP group. Furthermore, the UE may report the number of SD basis vectors selected for each TRP / TRP group, the total number of selected SD basis vectors, or the association between each SD basis vector and the ID of a TRP / TRP group. Such a setting (for example, the setting of the maximum number of SD basis vectors) may also be activated through a new RRC parameter.

[0272] The UE may also follow any of the following options 2a and 2b.

[0273] [Option 2a]

[0274] Even if the UE selects fewer SD basis vectors than the number of configured LLs, the UE can ensure that at least one SD basis vector is reported for each TRP / TRP group. To activate this option, a new RRC parameter can also be set. In this case, when LLs are configured for a TRP#i i =1, the UE may not need to report the number of SD basis vectors selected for this TRP#i.

[0275] [Option 2b]

[0276] The UE may also decide that there are no SD basis vectors reported for a certain TRP / TRP group (the number of reported SD basis vectors is zero). In order to activate this option, a new RRC parameter may also be set.

[0277] Figure 7 This figure shows an example of a combination of implementation #1 and implementation #2 for four TRPs, namely, TRP #1, #2, #3, and #4. iis the number of SD basis vectors set for TRP#i. i,rep is the number of SD basis vectors reported for TRP#i. LL is the total number of SD basis vectors set for all TRPs. rep is the total number of SD basis vectors reported for all TRPs. For the combination of Option 1 / 2 of Implementation #1 and Option 2a of Implementation #2, when LL1=4, LL2=2, LL3=1, and LL4=1, the UE may also report LL 1,rep =2, LL 2,rep =2, LL 3,rep =1, LL 4,rep =1. For the combination of option 1 / 2 of implementation #1 and option 2b of implementation #2, when LL1=4, LL2=2, LL3=1, and LL4=1, the UE may also report LL 1,rep =2, LL 2,rep =2, LL 3,rep =0, LL 4,rep = 0. For the combination of Option 3 of Implementation #1 and Option 2a of Implementation #2, when LL=6, the number of SD basis vectors reported for each TRP is 1 or more, so LL rep The TRP number is greater than 4. In this case, the UE can also determine the LL rep =5, report LL 1,rep =2, LL 2,rep =1, LL 3,rep =1, LL 4,rep =1. For the combination of option 3 of implementation #1 and option 2b of implementation #2, when LL=6, the UE may also determine LL rep =3, report LL 1,rep =2, LL 2,rep =1, LL 3,rep =0, LL 4,rep =0.

[0278] Variant

[0279] For example, different options / selections may be set / used for different codebook modes.

[0280] According to this embodiment, the UE is able to appropriately determine / report the number of SD basis vectors.

[0281] <Question#A1>

[0282] In order to control the maximum number of NZCs for each layer and all layers, the following two options are being studied for β set by RRC (parameter in paramCombination set by RRC).

[0283] [NZC parameter a] is the same β for all TRPs.

[0284] [NZC parameter b] β is different for each TRP.

[0285] K0 is the maximum number of NZCs for each layer. 2K0 is the maximum number of NZCs for all layers. Here, K0 = ceil(β2LM1), or K0 = ceil(β2K1M). 2L is the number of SD beams in the Rel.16 enhanced type 2 codebook. K1 is the number of ports selected in the Rel.17 port selection codebook.

[0286] The maximum number of NZCs controls the upper limit of the PMI size that the UE can report. A larger K0 has better DL performance but has a larger UCI overhead.

[0287] Furthermore, the introduction of the following restriction settings is under consideration.

[0288] The maximum number of NZCs corresponding to each layer in all X TRPs in one CSI-ReportConfig.

[0289] The maximum number of NZCs corresponding to all layers in all X TRPs in one CSI-ReportConfig.

[0290] In the bitmap reported to represent NZC, a bitmap for each TRP is being studied.

[0291] However, details on NZC restrictions / reporting are unclear.

[0292] Thus, research on the setting / decision / reporting related to CJT CSI is insufficient.

[0293] <Implementation method #A1>

[0294] This embodiment relates to the bitmap of NZC used for question #A1.

[0295] "Bit Figure 1 》

[0296] It is also possible to report a bitmap per TRP. In Rel.16 type 2 codebook, each bitmap has a size of 2LM. In Rel.17 type 2 port selection codebook, each bitmap has a size of K1M. It is also possible to report X separate bitmaps.

[0297] "Bit Figure 2 》

[0298] It is also possible to report a bitmap (joint bitmap) for all TRPs (X TRPs). The size of the joint bitmap can be either Σ i＝1 X 2L i M i , or Σ i＝1 X K 1,i M i .

[0299] Bitmap 3

[0300] It is also possible to report a bitmap for each group of CMR / TRPs. If the SD beam is different for each TRP, the number of bits in the bitmap for Y TRPs in a group can be either Σ i＝1 Y 2L i M i , or Σ i＝1 Y K 1,i M i If the SD beams of each TRP in a group are the same, the number of bits in the bitmap for Y TRPs in a group can be either 2L i M i , or K 1,i M i .

[0301] exist Figure 8 In the example, the first CMR group is associated with the CSI of the first TRP and the CSI of the second TRP. The same N=M is ​​used in the CSI of the first TRP and the CSI of the second TRP. v 1 = 4 FD bases. In the first CMR group, different SD beams are used in the first TRP and the second TRP. For the first TRP, 2L1 SD beams are used, and for the second TRP, 2L2 SD beams are used. The number of bits in the bitmap for the first CMR group can also be 2L1M v 1 +2L2M v 1 .

[0302] exist Fig. 9 In the example, the first CMR group is associated with the CSI of the first TRP and the CSI of the second TRP. In the first TRP and the second TRP, the same N=M is ​​used. v 1= 4 FD bases. In the first CMR group, the same 2L was used in the first TRP and the second TRP. 1 SD beams. The number of bits in the bitmap for the first CMR group can also be 2L 1 M v 1 .

[0303] Use bits Figure 1 / 2 / 3 This can be specified in the specification or set through RRC IE.

[0304] According to this embodiment, the UE can appropriately decide / report the bitmap of NZC used for CJT CSI.

[0305] <Question #A2>

[0306] Explanation #1 (NZC parameter 1) of "same β for all TRPs" (NZC parameter a) is that the same β is set for each TRP, and the maximum number of NZCs for each layer or all layers is considered for each TRP. For example, in the case of β=1 / 2, for each TRP, a maximum of 50% of the number of NZCs can be reported for one layer per TRP.

[0307] Interpretation #2 of "same β for all TRPs" (NZC parameter a) may be that a set β for all TRPs is applied to limit the total number of NZCs for all TRPs. Alternatively, a set β for all TRPs may be applied regardless of the maximum number of NZCs for each TRP.

[0308] It is also possible to consider the maximum total number of NZCs corresponding to each layer for all TRPs (regardless of the limitations of each TRP).

[0309] It is also possible to consider the maximum total number of NZCs corresponding to all layers for all TRPs (regardless of the limitations of each TRP).

[0310] In the (Rel.16) enhanced type 2 codebook or the (Rel.17) enhanced type 2 port selection codebook, a bitmap is used to indicate the NZC in W2. There is at least one '1' in the bitmap.

[0311] In CJT CSI after Rel.18, if the codebook structure of the CJT CSI mentioned above is taken into consideration, W2 is jointly selected for multiple TRPs. It is not clear whether it is allowed in the bitmap for NZC that no NZC is selected / reported for a certain TRP.

[0312] <Implementation method #A2>

[0313] This embodiment relates to problem #A2. The UE may also follow any of the following options.

[0314] Option 1

[0315] It is not allowed that an NZC for a TRP is not selected / reported. At least one NZC is selected / reported for each TRP. Alternatively, the minimum number of NZCs selected / reported for a TRP is 1.

[0316] In the bitmap indicating NZC for each TRP, at least one '1' may exist. The signaling may be a separate bitmap for each TRP or a single bitmap combined with multiple TRPs.

[0317] Option 2

[0318] It is allowed that for a TRP, no NZC is selected / reported. It is also allowed that the minimum number of NZCs selected / reported for a TRP is 0.

[0319] exist Fig.10 as well as Fig.11 In the example, the number of FD bases M for 4 TRPs is i Taking the common value M=4, the number of SD beams for the first TRP is 2L1=8, and the number of SD beams for the other TRPs is 2L2=2L3=2L4=4. Therefore, the number of coefficients for the first TRP on a layer is 2L1*M=32, and the number of coefficients for the other TRPs on the layer is 2L2*M=2L3*M=2L4*M=16. In this example, the number of FD bases M i It is a common value for X TRPs, but it can also be a separate value for each TRP. β=1 / 2 limits the maximum number of NZCs reported for each TRP. The number of NZCs actually reported can also be less than the maximum number of NZCs.

[0320] exist Fig.10 In the example of , using interpretation #1 and β=1 / 2, in the fourth TRP CSI, NZC is not selected / reported. Fig.11 In the example, using interpretation #2 and β=1 / 4, NZC is not selected / reported in the third TRP CSI. In option 1, it is also possible to not allow Fig.10 as well as Fig.11 In option 2, it is also possible to allow Fig.10 as well as Fig.11 at least one example of .

[0321] It is also possible to allow special cases where all NZCs selected / reported are derived from one and the same TRP.

[0322] When an NZC is not selected / reported for a TRP, the bitmap representing the NZC for the TRP may be omitted from the report, thereby reducing the reporting overhead.

[0323] Regarding which TRP to omit the bitmap for, in order to ensure that the UE and the base station have a common understanding, the UE / base station may also follow at least one of the following options.

[0324] [Option 2-1]

[0325] In the fixed-size CSI part 1, the actual (reported) number of NZCs for each TRP is reported. For example, in the case where [8,2,3,0] is reported as the number of NZCs for 4 TRPs, in the variable-size CSI part 2, there may not be a bitmap and NZC for the fourth TRP.

[0326] [Option 2-2]

[0327] In CSI part 1 of fixed size, the total number of actual (reported) NZCs for all TRPs is reported. One or more additional bits (bitmaps) may also be used to indicate whether each TRP has NZC. For example, in the case where 13 is reported as the total number of NZCs, an additional bitmap 1110 may also be used to indicate whether each TRP has NZC. The value '0' therein may also mean that the fourth TRP does not have NZC. Bit position i within the bitmap may also correspond to the i-th TRP.

[0328] It is also possible to import UE capabilities related to supporting the omission of TRP-specific NZC bitmaps. For example, it is also possible to configure the report using option 2 only when the aforementioned CJT CSI codebook structure 2 is supported and the corresponding UE capabilities are reported.

[0329] It is also possible to support / import RRC settings representing either of options 1 and 2 of the present embodiment.

[0330] The maximum number of TRPs to which the bitmap omission can be applied may also be limited. For example, the reporting of the bitmap / NAC corresponding to at most one TRP may be omitted.

[0331] According to this embodiment, the UE is able to appropriately report the NZC for each TRP.

[0332] <Implementation method #A3>

[0333] This embodiment relates to option 2 of embodiment #A2. When even one NZC is not selected / reported for a certain TRP (assuming that the NW sets the UE to report CJT CSI for N TRPs), it is unclear whether the SD basis for this TRP needs to be reported.

[0334] The UE may also follow any of the following options.

[0335] [Option 3-1]

[0336] In the case that an NZC is not selected / reported for a certain TRP, the SD basis for that TRP is reported in W1. In this case, the UE can also maintain CJT CSI reporting for N TRPs as configured.

[0337] [Option 3-2]

[0338] In the case that for a TRP, an NZC is also not selected / reported, the SD base for that TRP is omitted and not reported.

[0339] When option 2-1 / 2-2 of implementation mode #A2 is applied and the bitmap and NZC reporting for a certain TRP is not indicated, the UE may not report the CRI indicator or TRP indicator, and may not report the SD base indicator for the TRP. In this case, the overhead of CSI reporting can be further reduced.

[0340] It is also possible to import UE capabilities related to whether or not to support the omission of a TRP-specific SD base. For example, option 3-2 may be supported and set only when the corresponding UE capabilities are reported.

[0341] The UE may also report CJT CSI of (N-1), (N-2), … TRPs.

[0342] RRC settings between options 3-1 and 3-2 can also be supported.

[0343] The omitted TRPs of the application option 3-2 may also be limited to a maximum number. For example, the bitmap and NZC of at most one TRP may also be omitted.

[0344] According to this embodiment, the UE is able to appropriately report CJT CSI even when an NZC is not selected / reported for a certain TRP.

[0345] <Supplement>

[0346] [Notification of information to UE]

[0347] The notification of arbitrary information (from the network (Network (NW)) (for example, the base station (Base Station (BS)))) to the UE (in other words, the reception of arbitrary information from the BS in the UE) in the above-mentioned implementation manner can also be carried out using physical layer signaling (for example, DCI), high-layer signaling (for example, RRC signaling, MAC CE), specific signals / channels (for example, PDCCH, PDSCH, reference signals) or a combination thereof.

[0348] When the above notification is performed through MAC CE, the MAC CE can also be identified by including a new logical channel ID (Logical Channel ID (LCID)) not specified in the existing specifications in the MAC subheader.

[0349] In the case where the above-mentioned notification is made through DCI, the above-mentioned notification may also be made through a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used for scrambling a cyclic redundancy check (CRC) bit assigned to the DCI, the format of the DCI, etc.

[0350] Furthermore, the notification of arbitrary information to the UE in the above-mentioned embodiments may be performed periodically, semi-continuously, or aperiodically.

[0351] [Notification of information from UE]

[0352] The notification of arbitrary information from the UE (to the NW) in the above-mentioned embodiment (in other words, the sending / reporting of arbitrary information from the UE to the BS) can also be carried out using physical layer signaling (e.g., UCI), high-layer signaling (e.g., RRC signaling, MACCE), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signals) or a combination thereof.

[0353] In the case where the above notification is performed via MAC CE, the MAC CE can also be identified by including a new LCID that is not specified in the existing specifications in the MAC subheader.

[0354] When the notification is performed through UCI, the notification may be transmitted using PUCCH or PUSCH.

[0355] In addition, the notification of arbitrary information from the UE in the above-mentioned embodiments may be performed periodically, semi-continuously, or aperiodically.

[0356] [About application of each embodiment]

[0357] At least one of the above-mentioned embodiments may also be applied to a case where a specific condition is satisfied. The specific condition may be specified in the specification or may be notified to the UE / BS using high-layer signaling / physical layer signaling.

[0358] At least one of the above-mentioned implementation modes may also be applied only to UEs that report a specific UE capability (UE capability) or support the specific UE capability.

[0359] The specific UE capability may also represent at least one of the following:

[0360] Support for various options / selections.

[0361] ·Support for different numbers of SD basis vectors for each TRP / TRP group, and the maximum number of SD basis vectors that can be set for each TRP / TRP group.

[0362] ·Support for the same number of SD basis vectors for multiple TRPs / TRP groups, and the maximum number of SD basis vectors that can be set for each TRP / TRP group.

[0363] Support for the total number of SD basis vectors for all TRPs / TRP groups.

[0364] · Support for the maximum number of total number of SD basis vectors for all TRPs / TRP groups.

[0365] Support for determination of the number of SD basis vectors by the UE: The number of SD basis vectors determined / selected / reported may be less than the set number of SD basis vectors.

[0366] • Do not report support for SD base vectors for a certain TRP / TRP group.

[0367] In addition, the above-mentioned specific UE capabilities can be capabilities that are applied across all frequencies (commonly regardless of frequency), or capabilities for each frequency (for example, one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), or capabilities for each frequency range (for example, frequency range 1 (Frequency Range 1 (FR1)), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities for each feature set (Feature Set (FS)) or feature set per component carrier (Feature Set Per Component-carrier (FSPC)).

[0368] In addition, the above-mentioned specific UE capabilities can be capabilities applied across full-duplex modes (common regardless of the duplex mode) or capabilities for each duplex mode (for example, time division duplex (TDD) and frequency division duplex (FDD)).

[0369] In addition, at least one of the above-mentioned embodiments may also be applied to a case where the UE is set / activated / triggered with specific information associated with the above-mentioned embodiments (or an action to implement the above-mentioned embodiments) through high-layer signaling / physical layer signaling. For example, the specific information may also be information indicating activation of the functions of each embodiment, any RRC parameter for a specific version (e.g., Rel.18 / 19), etc.

[0370] The UE may also apply the operations of Rel.15 / 16, for example, when it does not support at least one of the above-mentioned specific UE capabilities or is not configured with the above-mentioned specific information.

[0371] (Note)

[0372] The following inventions are attached to one embodiment of the present disclosure.

[0373] [Note 1]

[0374] Terminal, with:

[0375] A receiving unit receives settings of one or more parameters related to the number of spatial domain basis vectors for a plurality of transmission points; and

[0376] The control unit determines, based on the setting, the number of spatial domain basis vectors to be reported for the multiple transmission points.

[0377] [Note 2]

[0378] In the terminal described in Note 1, the one or more parameters are multiple parameters corresponding to the multiple sending points respectively.

[0379] [Note 3]

[0380] For the terminal described in Note 1 or Note 2, the one or more parameters are common parameters for the multiple sending points.

[0381] [Note 4]

[0382] In the terminal described in any one of Notes 1 to 3, the one or more parameters are related to the total number of spatial domain basis vectors for the multiple transmission points.

[0383] (Wireless Communication System)

[0384] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using any one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0385] Fig.12 1 is a diagram showing an example of a schematic structure of a wireless communication system involved in one embodiment. The wireless communication system 1 (may also be simply referred to as system 1) may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5GNR), and the like.

[0386] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA))) and NR (E-UTRA-NR Dual Connectivity (E-UTRA-NR Dual Connectivity (EN-DC))), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

[0387] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0388] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0389] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as base stations 10.

[0390] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0391] Each CC may 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)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (lower than 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (higher than 24 GHz (above-24 GHz)). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to this. For example, FR1 may also correspond to a frequency band higher than FR2.

[0392] Furthermore, in each CC, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0393] Multiple base stations 10 may also be connected via wired (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station (relay) may also be referred to as an IAB node.

[0394] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0395] The core network 30 may also include, for example, user plane functions (User Plane Function (UPF)), access and mobility management function (Access and Mobility Management Function (AMF)), session management function (Session Management Function (SMF)), unified data management (Unified Data Management (UDM)), application function (Application Function (AF)), data network (Data Network (DN)), location management function (Location Management Function (LMF)), conservative operation management (Operation, Administration and Maintenance (Management) (OAM): operation maintenance management) and other network functions (Network Functions (NF)). In addition, multiple functions may be provided by one network node. In addition, communication with an external network (for example, the Internet) may also be carried out via the DN.

[0396] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0397] In the wireless communication system 1, a wireless access method based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. may be used.

[0398] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the radio access schemes for UL and DL.

[0399] As downlink channels, the wireless communication system 1 may use a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc.

[0400] In addition, as uplink channels, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20), an uplink control channel (Physical Uplink Control Channel (PUCCH))), a random access channel (Physical Random Access Channel (PRACH)) and the like can also be used in the wireless communication system 1.

[0401] The PDSCH transmits user data, high-layer control information, system information block (SIB), etc. The PUSCH transmits user data, high-layer control information, etc. In addition, the PBCH transmits the master information block (MIB).

[0402] The PDCCH may also transmit lower layer control information. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0403] In addition, the DCI for scheduling the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be rewritten as DL data, and the PUSCH may also be rewritten as UL data.

[0404] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space setting.

[0405] A search space may also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be rewritten mutually.

[0406] Through PUCCH, uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.) and scheduling request (SR) can also be transmitted. Through PRACH, random access preambles for establishing a connection with a cell can also be transmitted.

[0407] In the present disclosure, downlink, uplink, etc. may be expressed without "link". In addition, various channels may be expressed without "Physical" at the beginning.

[0408] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted as DL-RS.

[0409] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SSB), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0410] In addition, as an uplink reference signal (UL-RS), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted in the wireless communication system 1. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0411] (Base Station)

[0412] Fig.131 is a diagram showing an example of a structure of a base station involved in one embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may each be provided with more than one.

[0413] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0414] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0415] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of wireless resources, etc.

[0416] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0417] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0418] The transmitting / receiving antenna 130 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0419] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0420] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0421] The sending and receiving unit 120 (sending processing unit 1211), for example, may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0422] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (Discrete Fourier Transform (DFT)) processing (as needed), inverse fast Fourier transform (Inverse Fast Fourier Transform (IFFT)) processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0423] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0424] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0425] The sending and receiving unit 120 (receiving processing unit 1212) can also apply 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 the acquired baseband signal to obtain user data, etc.

[0426] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (Radio Resource Management (RRM)) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (Received Signal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0427] The transmission path interface 140 can also send and receive signals (return signaling) between the devices included in the core network 30 (for example, the network node providing NF), other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0428] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission and reception unit 120 , the transmission and reception antenna 130 , and the transmission path interface 140 .

[0429] The transmitting and receiving unit 120 may also transmit the settings of one or more parameters related to the number of spatial domain basis vectors for the plurality of transmission points. The control unit 110 may also control the reception of reports of the spatial domain basis vectors for the plurality of transmission points based on the settings.

[0430] (User Terminal)

[0431] Fig.14 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. In addition, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided with one or more.

[0432] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0433] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0434] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 220.

[0435] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0436] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0437] The transmitting / receiving antenna 230 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0438] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0439] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0440] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0441] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0442] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is valid (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0443] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0444] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230 .

[0445] The sending and receiving unit 220 (receiving processing unit 2212) can also apply analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0446] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0447] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0448] The transmitting and receiving unit 220 may also receive the settings of one or more parameters related to the number of spatial domain basis vectors for multiple transmission points. The control unit 210 may also determine the number of spatial domain basis vectors reported for the multiple transmission points based on the settings.

[0449] The one or more parameters may also be a plurality of parameters corresponding to the plurality of sending points respectively.

[0450] The one or more parameters may also be parameters common to the multiple sending points.

[0451] The one or more parameters may also be related to the total number of spatial domain basis vectors for the multiple transmission points.

[0452] (Hardware Structure)

[0453] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly (for example, by wired, wireless, etc.) connected and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0454] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method thereof is not particularly limited.

[0455] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.15 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0456] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. can be interchangeably used. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0457] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0458] Regarding the various functions in the base station 10 and the user terminal 20, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, the processor 1001 performs calculations and controls the communication via the communication device 1004, or by controlling at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0459] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), the sending and receiving unit 120 (220), etc. may also be implemented by the processor 1001.

[0460] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to perform at least a part of the operations described in the above-mentioned 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, and the same can be implemented for other functional blocks.

[0461] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0462] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disk, a Blu-ray (Blu-ray) (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0463] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) may also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0464] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0465] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0466] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0467] (Variation Example)

[0468] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may also be rewritten with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the standard applied. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0469] A wireless frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a wireless frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0470] Here, the parameter set may also be a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, a wireless frame structure, a specific filtering process performed by a transmitter and receiver in the frequency domain, a specific windowing process performed by a transmitter and receiver in the time domain, and the like.

[0471] A time slot may 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 the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0472] A time slot may also include multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0473] 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 may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be replaced with each other.

[0474] For example, a subframe may be referred to as a TTI, a plurality of consecutive subframes may be referred to as a TTI, and a time slot or a mini time slot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0475] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0476] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0477] In addition, when a time slot or a mini time slot is called TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) can also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can also be controlled.

[0478] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0479] In addition, a long TTI (e.g., normal TTI, subframe, etc.) can also be rewritten as a TTI with a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) can also be rewritten as a TTI with a TTI length shorter than that of the long TTI and longer than 1 ms.

[0480] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0481] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks, respectively.

[0482] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0483] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0484] Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, common RBs may also be identified by the index of the RB relative to the common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0485] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured in one carrier.

[0486] At least one of the set BWPs may be activated, and the UE may not assume that a specific signal / channel is transmitted or received outside the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be rewritten as "BWP".

[0487] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0488] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0489] In the present disclosure, the names used for parameters, etc. are not restrictive in all respects. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not restrictive in all respects.

[0490] Information, signals, etc. described in this disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0491] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0492] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0493] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI))), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB)), etc.), Medium Access Control (MAC) signaling), other signals or a combination thereof.

[0494] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (Layer 1 / Layer 2 (L1 / L2)) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0495] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0496] The determination can be made by a value represented by a bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a specific value).

[0497] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0498] In addition, software, instructions, information, etc. may 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 technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0499] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0500] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0501] In the present disclosure, terms such as "Base Station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro-micro cell, and micro-micro cell.

[0502] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that performs communication services within the coverage area.

[0503] In the present disclosure, the matter of a base station sending information to a terminal may be replaced with the matter of the base station instructing the terminal to control / operate based on the information.

[0504] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0505] There are also cases where a mobile station is referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client or some other appropriate terminology.

[0506] At least one of the base station and the mobile station may also be referred to as a transmission device, a reception device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a moving object, a moving object body, etc.

[0507] The mobile body refers to a movable object, and the moving speed is arbitrary, including the case where the mobile body is stopped. The mobile body includes, for example, vehicles, transport vehicles, cars, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, carts, rickshaws, ships (ships and other watercraft), airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, hot air balloons, and objects carried on them, but is not limited to these. In addition, the mobile body can also be a mobile body that drives autonomously based on operating instructions.

[0508] The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes 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.

[0509] Fig.16 1 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0510] The driving unit 41 is composed of at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is composed of at least a steering wheel (also called a handle), and steers at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0511] The electronic control unit 49 is composed of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be referred to as an electronic control unit (Electronic Control Unit (ECU)).

[0512] As signals from various sensors 50-58, there are the following signals, etc.: a current signal from a current sensor 50 for sensing the current of a motor, a speed signal of the front wheels 46 / rear wheels 47 obtained by a speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of an accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of a brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of a shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0513] The information service unit 59 is composed of various devices for providing (outputting) various information such as driving information, traffic information, entertainment information, etc., such as a navigation system, an audio system, a speaker, a display, a television, and a radio, and one or more ECUs for controlling these devices. The information service unit 59 uses information obtained from an external device via the communication module 60, etc. to provide various information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40.

[0514] The information service unit 59 may include input devices for accepting input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.), and may also include output devices for implementing output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[0515] The driving assistance system unit 64 is composed of various devices for providing functions for preventing accidents before they happen or reducing the driver's driving burden, such as millimeter wave radar, light detection and ranging (LiDAR), camera, positioning detector (for example, Global Navigation Satellite System (GNSS)), map information (for example, High Definition (HD) map, Autonomous Vehicle (AV) map, etc.), gyroscope system (for example, inertial measurement unit (Inertial Measurement Unit (IMU))), inertial navigation unit (Inertial Navigation System (INS))), artificial intelligence (Artificial Intelligence (AI)) chip, AI processor, and one or more ECUs that control these devices. In addition, the driving assistance system unit 64 sends and receives various information via the communication module 60 to realize the driving assistance function or the automatic driving function.

[0516] 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 transmits and receives data (information) with the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the microprocessor 61 and the memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58 of the vehicle 40 via the communication port 63.

[0517] The communication module 60 can be controlled by the microprocessor 61 of the electronic control unit 49, and is a communication device that can communicate with an external device. For example, various information is sent and received with the external device via wireless communication. The communication module 60 can be inside or outside the electronic control unit 49. The external device can also be, for example, the above-mentioned base station 10, user terminal 20, etc. In addition, the communication module 60 can also be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (it can also function as at least one of the base station 10 and user terminal 20).

[0518] The communication module 60 may also transmit at least one of the signals from the various sensors 50-58 input to the electronic control unit 49, the information obtained based on the signals, and the information based on the input from the outside (user) obtained via the information service unit 59 to the external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may also be referred to as an input unit that receives input. For example, the PUSCH transmitted by the communication module 60 may also include information based on the above input.

[0519] The communication module 60 receives various information (traffic information, signal information, vehicle information, etc.) sent from an external device, and displays it on the information service unit 59 provided in the vehicle. The information service unit 59 may also be referred to as an output unit for outputting information (for example, outputting information to a display, a speaker, etc. based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0520] In addition, the communication module 60 stores various information received from the external device in the memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 can also control the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the various sensors 50-58, etc., which are provided in the vehicle 40.

[0521] In addition, the base station in the present disclosure may also be rewritten as a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink", "downlink", etc. may also be rewritten as terms corresponding to communication between terminals (for example, "sidelink"). For example, uplink channels, downlink channels, etc. may also be rewritten as sidelink channels.

[0522] Likewise, the user terminal in the present disclosure may be rewritten as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0523] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node according to the circumstances. In a network including one or more network nodes having a base station, various operations performed for communication with a terminal can obviously be performed by the base station, one or more network nodes other than the base station (for example, Mobility Management Entity (MME)), Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0524] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, timings, flow charts, etc. of the various methods / implementations described in this disclosure may be swapped in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0525] The various modes / implementations described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems that are expanded, modified, generated, or specified based on them. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0526] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0527] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used or that the first element must take precedence over the second element in some form.

[0528] The term "determining" used in the present disclosure may include a variety of operations. For example, "determining" may also refer to situations where judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. are considered to be "determining".

[0529] In addition, "judgment (decision)" may also be a situation where receiving (for example, receiving information), sending (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0530] That is, "judgment (decision)" can also be regarded as a situation in which some actions are regarded as "judgment (decision)". In addition, "judgment (decision)" can also be rewritten as "assuming (assuming)", "expecting (expecting)", "considering (considering)", etc.

[0531] The “maximum transmit power” recorded in the present disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated maximum transmit power).

[0532] The terms "connected", "coupled", or all their variations used in this disclosure refer to all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be rewritten as "access".

[0533] In the present disclosure, when two elements are connected, it is possible to consider being "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., and as several non-limiting and non-inclusive examples, being "connected" or "combined" to each other using electromagnetic energy with a wavelength in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc.

[0534] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same manner as "different".

[0535] When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms have an inclusive meaning, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not have an exclusive OR meaning.

[0536] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0537] In the present disclosure, "below", "less than", "above", "more", "equal to", etc. may also be rephrased with each other. Furthermore, in the present disclosure, words meaning "good", "bad", "big", "small", "high", "low", "early", "slow", "wide", "narrow", etc. are not limited to the original form, comparative form and superlative form, but may also be rephrased with each other. Furthermore, in the present disclosure, words meaning "good", "bad", "big", "small", "high", "low", "early", "slow", "wide", "narrow", etc. are not limited to the original form, comparative form and superlative form, but may also be rephrased with each other as expressions with "the ith" (i is an arbitrary integer) attached thereto (for example, "the highest" may also be rephrased with "the ith highest").

[0538] In the present disclosure, “of”, “for”, “regarding”, “related to”, “associated with”, etc. may be replaced by each other.

[0539] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: A receiving unit receives settings of one or more parameters related to the number of spatial domain basis vectors for a plurality of transmission points; and The control unit determines, based on the setting, the number of spatial domain basis vectors to be reported for the multiple transmission points.

2. The terminal according to claim 1, wherein: The one or more parameters are multiple parameters corresponding to the multiple sending points respectively.

3. The terminal according to claim 1, wherein: The one or more parameters are parameters common to the multiple transmission points.

4. The terminal according to claim 1, wherein: The one or more parameters are related to the total number of spatial domain basis vectors for the multiple transmission points.

5. A wireless communication method of a terminal, comprising: The step of receiving a setting of one or more parameters related to the number of spatial domain basis vectors for a plurality of transmission points; and Based on the setting, a step of determining the number of spatial domain basis vectors reported for the multiple transmission points.

6. A base station, comprising: a transmitting unit configured to transmit settings of one or more parameters related to the number of spatial domain basis vectors for a plurality of transmission points; and The control unit controls, based on the setting, reception of reports of spatial domain basis vectors for the plurality of transmission points.

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