Terminal, wireless communication method, base station and system

Abstract

A terminal according to one embodiment of the present disclosure is characterized by having: a transmission unit that transmits a channel state information (CSI) report; and a control unit that determines, if at least one channel quality indicator (CQI) is to be included in the CSI report, at least one of the number of CQIs, the bit width of the CQI, and an index of the CQI, on the basis of a certain condition. According to the embodiment of the present disclosure, it is possible to appropriately execute CSI reporting pertaining to the impact of movement.

Description

Terminal, wireless communication method and base station

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

[0002] Long Term Evolution (LTE) has been specified for the Universal Mobile Telecommunications System (UMTS) network with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Also, LTE-Advanced (3GPP Rel. 10-14) has been specified with the aim of achieving higher capacity and more advanced features than LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later, etc.) are also being considered.

[0004] 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

[0005] In future wireless communication systems (e.g., NR), it is being considered to report channel state information (CSI) based on reception of reference signals, and to improve communication performance in mobile / medium-speed mobile terminals (user terminals, user equipment (UE)).

[0006] However, there has been little progress in the study of CSI reporting related to the impact of mobility. Unless such a method is clearly defined, there is a risk that communication throughput, communication quality, etc. will deteriorate.

[0007] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately report CSI related to the effect of movement.

[0008] A terminal according to one aspect of the present disclosure is characterized by having a transmitter that transmits a channel state information (CSI) report, and a controller that, when at least one channel quality indicator (CQI) is included in the CSI report, determines at least one of the number of the CQIs, a bit width of the CQIs, and an index of the CQI based on certain conditions.

[0009] According to one aspect of the present disclosure, CSI reporting regarding the impact of movement can be performed appropriately.

[0010] Figure 1 shows an example of a 16-level quantization table. Figure 2 shows an example of an 8-level quantization table. Figures 3A and 3B show an example of a Rel. 16 type 2-port selection codebook. Figures 4A and 4B show an example of a Rel. 17 type 2-port selection codebook. Figure 5 shows an example of the relationship between CSI-RS resources and CSI reporting. Figure 6 shows an example of a CSI-RS measurement window and a CSI reporting window. Figure 7 shows an example of an AI model management framework. Figures 8A to 8C show the relationship between CQI values ​​and offset levels. Figure 9 shows an example of AI-based CSI feedback. Figure 10 shows an example of a CSI report. Figure 11 shows an example of a CSI report according to the first embodiment. Figure 12 shows an example of a CSI reporting window according to the third embodiment. Figure 13 shows another example of a CSI reporting window according to the third embodiment. Figure 14 shows another example of a CSI reporting window according to the third embodiment. Fig. 15 is a diagram showing an example of a CSI report according to the fourth embodiment. Fig. 16 is a diagram showing another example of a CSI report according to the fourth embodiment. Fig. 17 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. Fig. 18 is a diagram showing an example of a configuration of a base station according to an embodiment. Fig. 19 is a diagram showing an example of a configuration of a user terminal according to an embodiment. Fig. 20 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment. Fig. 21 is a diagram showing an example of a vehicle according to an embodiment.

[0011] (CSI Report or Reporting) In Rel. 15 NR, a terminal (also referred to as a user terminal, User Equipment (UE), etc.) generates (also referred to as determining, calculating, estimating, measuring, etc.) channel state information (CSI) based on a reference signal (RS) (or a resource for the RS), and transmits (also referred to as reporting, feedback, etc.) the generated CSI to a network (e.g., a base station). The CSI may be transmitted to the base station, for example, using an uplink control channel (e.g., a Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (e.g., a Physical Uplink Shared Channel (PUSCH)).

[0012] The RS used to generate the CSI may be, for example, at least one of a Channel State Information Reference Signal (CSI-RS), a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, a Synchronization Signal (SS), a Demodulation Reference Signal (DMRS), etc.

[0013] The CSI-RS may include at least one of a non-zero power (NZP) CSI-RS and a CSI-Interference Management (CSI-IM). The SS / PBCH block is a block including an SS and a PBCH (and corresponding DMRS), and may be referred to as an SS block (SSB). The SS may include at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

[0014] The CSI may include at least one of a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a CSI-RS Resource Indicator (CRI), a SS / PBCH Block Resource Indicator (SSBRI), a Layer Indicator (LI), a Rank Indicator (RI), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), L1-SNR (Signal to Noise Ratio), and the like.

[0015] The UE may receive information related to CSI reporting (report configuration information) and control CSI reporting based on the report configuration information. The report configuration information may be, for example, "CSI-ReportConfig" of an information element (IE) of Radio Resource Control (RRC). Note that in the present disclosure, the RRC IE may be interchangeably read as an RRC parameter, an upper layer parameter, or the like.

[0016] The reporting configuration information (e.g., "CSI-ReportConfig" of the RRC IE) may include, for example, at least one of the following: - Information on the type of CSI report (report type information, e.g., "reportConfigType" of the RRC IE) - Information on one or more quantities of CSI to be reported (one or more CSI parameters) (report quantity information, e.g., "reportQuantity" of the RRC IE) - Information on RS resources used to generate the quantities (the CSI parameters) (resource information, e.g., "CSI-ResourceConfigId" of the RRC IE) - Information on the frequency domain targeted for CSI reporting (frequency domain information, e.g., "reportFreqConfiguration" of the RRC IE)

[0017] For example, the report type information may indicate a periodic CSI (P-CSI) report, an aperiodic CSI (A-CSI) report, or a semi-persistent CSI (SP-CSI) report.

[0018] Furthermore, the reporting amount information may specify a combination of at least one of the above CSI parameters (for example, CRI, RI, PMI, CQI, LI, L1-RSRP, etc.).

[0019] The resource information may also be an ID of a resource for the RS. The resource for the RS may include, for example, a non-zero-power CSI-RS resource or an SSB, and a CSI-IM resource (for example, a zero-power CSI-RS resource).

[0020] The frequency domain information may also indicate frequency granularity of the CSI report. The frequency granularity may include, for example, a wideband and a subband. The wideband is the entire CSI reporting band. The wideband may be, for example, the entirety of a certain carrier (a component carrier (CC)), a cell, or a serving cell) or the entirety of a 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.

[0021] Furthermore, a subband is a part of a wideband and may be configured with one or more resource blocks (RBs or PRBs). The size of the subband may be determined according to the size of the BWP (the number of PRBs).

[0022] The frequency domain information may indicate whether wideband or subband PMI is to be reported (the frequency domain information may include, for example, an RRC IE "pmi-FormatIndicator" used to determine whether wideband PMI reporting or subband PMI reporting is to be performed). The UE may determine the frequency granularity of CSI reporting (i.e., whether wideband PMI reporting or subband PMI reporting is to be performed) based on at least one of the reporting amount information and the frequency domain information.

[0023] When wideband PMI reporting is configured, one wideband PMI may be reported for the entire CSI reporting band, whereas when subband PMI reporting is configured, a single wideband indication i1 may be reported for the entire CSI reporting band, and one subband indication i2 (e.g., a subband indication for each subband) may be reported for each of one or more subbands within the entire CSI reporting band.

[0024] The UE performs channel estimation using the received RS to estimate a channel matrix H. The UE feeds back a PMI determined based on the estimated channel matrix.

[0025] The PMI may indicate a precoder matrix (also simply referred to as a precoder) that the UE considers appropriate for use in downlink (DL) transmissions to the UE. Each value of the PMI may correspond to one precoder matrix. A set of PMI values ​​may correspond to a set of different precoder matrices, called a precoder codebook (also simply referred to as a codebook).

[0026] In the space domain, a CSI report may include one or more types of CSI. For example, the CSI may include at least one of a first type (Type 1 CSI) used for single-beam selection and a second type (Type 2 CSI) used for multi-beam selection. The single beam may be rephrased as a single layer, and the multi-beam may be rephrased as multiple beams. Furthermore, Type 1 CSI does not assume multi-user multiple input multiple output (MIMO), while Type 2 CSI may assume multi-user MIMO.

[0027] The codebook may include a codebook for Type-1 CSI (also referred to as a Type-1 codebook, etc.) and a codebook for Type-2 CSI (also referred to as a Type-2 codebook, etc.). Furthermore, Type-1 CSI may include Type-1 single-panel CSI and Type-1 multi-panel CSI, and different codebooks (Type-1 single-panel codebook, Type-1 multi-panel codebook) may be defined for each.

[0028] In the present disclosure, Type 1 and Type I may be interpreted as interchangeable. In the present disclosure, Type 2 and Type II may be interpreted as interchangeable.

[0029] The uplink control information (UCI) type may include at least one of a Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), a scheduling request (SR), and CSI. The UCI may be carried by the PUCCH or the PUSCH.

[0030] In Rel. 15 NR, UCI may contain one CSI part for wideband PMI feedback. CSI report #n contains PMI wideband information if reported.

[0031] In Rel. 15 NR, UCI can include two CSI parts for subband PMI feedback. CSI Part 1 includes wideband PMI information. CSI Part 2 includes one wideband PMI and several subband PMIs. CSI Part 1 and CSI Part 2 are coded separately.

[0032] In Rel. 15 NR, a UE is configured by higher layers with N (N≧1) CSI reporting configuration report settings and M (M≧1) CSI resource configuration resource settings. For example, the CSI reporting configuration (CSI-ReportConfig) includes a channel measurement resource setting (resourcesForChannelMeasurement), a CSI-IM resource setting for interference (csi-IM-ResourceForInterference), an NZP-CSI-RS resource setting for interference (nzp-CSI-RS-ResourceForInterference), and a report quantity (reportQuantity). The channel measurement resource setting, the interference CSI-IM resource setting, and the interference NZP-CSI-RS resource setting are each associated with a CSI resource configuration (CSI-ResourceConfig, CSI-ResourceConfigId). The CSI resource configuration includes a list of CSI-RS resource sets (csi-RS-ResourceSetList, for example, an NZP-CSI-RS resource set or a CSI-IM resource set).

[0033] For both FR1 and FR2, evaluation and provision of CSI reporting for DL ​​multi-TRP and / or multi-panel transmissions is under consideration to enable more dynamic channel / interference hypotheses for NCJT.

[0034] (Codebook Configuration) The UE is configured with parameters related to the codebook (codebook configuration (CodebookConfig)) by higher layer signaling (RRC signaling). The codebook configuration is included in the CSI report configuration (CSI-ReportConfig) of the higher layer (RRC) parameters.

[0035] In the codebook setting, at least one codebook is selected from among type 1 single panel (type I-Single Panel), type 1 multi-panel (type I-Multi Panel), type 2 (type II), and type 2 port selection (type II-Port Selection).

[0036] The codebook parameters include parameters related to the codebook subset restriction (CBSR). The CBSR setting is a bit that indicates which PMI reports are allowed ('1') and which are not allowed ('0') for the precoder associated with the CBSR bit. One bit in the CBSR bitmap corresponds to one codebook index / antenna port.

[0037] (CSI Reporting Configuration) The CSI reporting configuration (CSI-ReportConfig) of Rel. 16 includes, in addition to the codebook configuration (CodebookConfig), 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. Of the parameters of CSI-ReportConfig, parameters excluding codebookConfig-r16 are also included in the CSI reporting configuration of Rel. 15.

[0038] Rel. 17 considers an extended CSI reporting configuration (CSI-ReportConfig) for CSI measurement / reporting of multi-TRP using NCJT. In this CSI reporting configuration, two CMR groups corresponding to two TRPs are configured. CMRs in a CMR group may be used for at least one of multi-TRP and single-TRP measurements using NCJT. N CMR pairs of NCJT are configured by RRC signaling. The UE may be configured by RRC signaling whether to use a CMR of a CMR pair for single-TRP measurements.

[0039] For CSI reporting related to multi-TRP / panel NCJT measurements configured by a single CSI reporting configuration, it is considered that at least one of the following options 1 and 2 will be supported.

[0040] <Option 1> The UE is configured to report X (X=0, 1, 2) CSIs related to single-TRP measurement hypotheses / hypotheses and one CSI related to NCJT measurements. If X=2, the two CSIs are related to two different single-TRP measurements using CMRs from different CMR groups.

[0041] <Option 2> The UE may be configured to report one CSI associated with the best measurement result among the measurement hypotheses for NCJT and single TRP.

[0042] As described above, in Rel. 15 / 16, the CBSR is configured per codebook configuration per CSI reporting configuration, i.e., the CBSR applies to all CMRs, etc. within the corresponding CSI reporting configuration.

[0043] However, in the CSI reporting configuration for Rel. 17 multi-TRP, when the above-mentioned options 1 and 2 are applied, the following measurement configurations may be performed: Option 1 (X = 0): Measurement of NCJT CSI only. Option 1 (X = 1): Measurement of NCJT CSI and CSI of a single TRP (one TRP). Option 1 (X = 2): Measurement of NCJT CSI and CSI of a single TRP (two TRPs). Option 2: Measurement of both NCJT CSI and CSI of a single TRP.

[0044] (Type 1 Codebook) A Type 1 single panel codebook and a Type 1 multi-panel codebook are specified for the base station panel. In the Type 1 single panel, the number of CSI-RS antenna ports P CSI-RS For (N1, N2), the antenna model of the CSI antenna port array (logical configuration) is specified. In Type 1 multi-panel, the number of CSI-RS antenna ports P CSI-RS and (N g , N1, N2), an antenna model of the CSI antenna port array (logical configuration) is specified.

[0045] For Rel. 15 Type 1 Single Panel CSI, the UE sets the codebook type upper layer parameter (subType in type1 in codebookType in CodebookConfig) to Type 1 Single Panel ('typeI-SinglePanel'). If the number of layers v is not {2,3,4}, the PMI value is calculated based on the three codebook indices i 1,1 ,i 1,2 , i2. When the number of layers v∈{2,3,4}, the PMI values ​​correspond to the four codebook indices i 1,1 ,i 1,2 ,i 1,3 , i2. If the number of layers v is not {2,3,4}, then the composite codebook index i1 = [i 1,1 ,i 1,2 ]. When the number of layers v∈{2,3,4}, the composite codebook index i1=[i1,1 ,i 1,2 ,i 1,3 ].

[0046] Number of CSI antenna ports P CSI-RS The supported settings (combinations of values) of (N1,N2) and (O1,O2) are defined in the specification. (N1,N2) indicates 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. The i corresponding to the horizontal beam 1,1 is {0,1,...,N1O1-1}. The i corresponding to the vertical beam 1,2 is {0,1,...,N2O2-1}. i2 is {0,1,2,3}. For codebook mode (codebookMode) = 1, antenna ports 3000 to 2999+P CSI-RS The matrix for the 1-layer CSI reporting codebook using 1,1 ,i 1,2 ,i2^(1), where W l,m,n (1) is given by the following equation:

[0047] For Rel. 15 Type 1 multi-panel CSI, compared to Type 1 single panel, in addition to N1 and N2, the number of panels N g is set as inter-panel co-phasing (phase compensation between panels), i, 1,4 The same SD beam (precoding matrix W l ) is selected and only inter-panel phase matching is additionally reported.

[0048] Number of CSI antenna ports P CSI-RS Supported (N gThe settings (combination of values) of (N1,N2) and (O1,O2) are defined in the specification. (N1,N2) are set by ng-n1-n2 in typeI-MultiPanel. i 1,1 is {0,1,...,N1O1-1}. i 1,2 is {0,1,...,N2O2-1}. q=1,...,N g -1 vs. i 1,4,q is {0,1,2,3}. i2 is {0,1,2,3}. For codebook mode (codebookMode) = 1, antenna ports 3000 to 2999+P CSI-RS The matrix for the 1-layer CSI reporting codebook using 1,1 ,i 1,2 ,i 1,4 ,i2^(1), where W l,m,p,n (1) =W l,m,p,n ^1,N g ,1.

[0049] N g =W_l,m,p,n^1,N for {2,4} g ,1 and W_l,m,p,n^2,N g ,1 (first layer, N g = 2, matrix W for codeBookMode=1 l,m,p,n 1,2,1 and the second layer, N g = 2, matrix W for codeBookMode=1 l,m,p,n 2,2,1 and the first layer, N g = 4, matrix W for codeBookMode = 1 l,m,p,n 1,4,1 and the second layer, N g = 4, matrix W for codeBookMode = 1 l,m,p,n 2,4,1 and ) are given by the following equations:

[0050] where φ n =e jπn / 2 N g =2, p=p1, and N gFor φ = 4, p = [p1, p2, p3]. φ_p1, φ_p2, and φ_p3 represent inter-panel phase matching. The same beam (SD beam matrix, precoding matrix W) is used for panels 0, 1, 2, and 3. l ) are selected, φ_p1 represents the phase compensation of panel 1 relative to panel 0, φ_p2 represents the phase compensation of panel 2 relative to panel 0, and φ_p3 represents the phase compensation of panel 3 relative to panel 0.

[0051] (Type 2 Codebook) Assuming an ideal backhaul, synchronization, and the same number of antenna ports across multiple TRPs, CSI acquisition for coherent joint transmission (CJT) for FR1 and up to four TRPs is considered. An improvement to the Rel. 16 / 17 Type 2 codebook is considered for CJT multi-TRP for FDD.

[0052] In this disclosure, a matrix Z with X rows and Y columns may be expressed as Z(X×Y).

[0053] In Rel. 15 Type 2 CSI, for a given layer k, the generation of a subband-wise (SB-wise) precoding vector is based on the following equation: W k (N t ×N3) = W1W 2,k (Y1)

[0054] N t is the number of antennas / ports. N3 is the total number of precoding (beamforming) matrices (precoders) indicated by the PMI (number of subbands). W1(N t ×2L) is a matrix (SD beam matrix) consisting of L∈{2,4} (oversampled) spatial domain (SD) two-dimensional (2D) DFT vectors (SD beams, 2D-DFT vectors). L is the number of beams. The actual number of beams considering horizontal and vertical polarization at one location is 2L. For example, L=2 SD 2D-DFT vectors are each b i ,b j W2,k (2L×N3) is the subband complex linear combination (LC) coefficient matrix for layer k. W 2,k represents the beam selection and co-phasing between the two polarizations. For example, 2,k are c i ,c j For example, the channel matrix h is a linear combination of L=2 SD 2D-DFT vectors, c i b i ,+c j b j The feedback overhead is mainly due to the LC coefficient matrix W 2,k Also, Type 2 CSI in Rel. 15 only supports ranks 1 and 2.

[0055] Rel. 16 Type 2 CSI uses frequency domain (FD) compression to reduce W 2,k Rel. 16 Type 2 CSI supports ranks 3 and 4 in addition to ranks 1 and 2.

[0056] In Rel. 16, Type 2 CSI may be reported by the UE for a given layer k, based on the following equation: W k = W1W ~ k W f,k H (Y2)

[0057] W 2,k is W ~ k W f,k H It is approximated by the matrix W ~ can be expressed by adding a tilde (~) to W. f,k H is W f,k is the adjugate matrix of

[0058] For CSI reporting, the UE may be configured with one of two subband sizes: N PRB SB The number of PMI subbands per CQI subband, R, is defined as consecutive PRBs and may depend on the total number of PRBs in the BWP. The number of PMI subbands per CQI subband, R, is configured by the RRC IE (numberOfPMI-SubbandsPerCQI-Subband). R controls the total number of precoding matrices, N3, represented by the PMI, as a function of the number of subbands configured in the csi-ReportingBand, the subband size configured by subbandSize, and the total number of PRBs in the BWP.

[0059] W1(N t ×2L) is a matrix consisting of multiple (oversampled) spatial domain (SD) 2D-DFT (vector, beam). For this matrix, multiple indices of the 2D Discrete Fourier Transform (2D-DFT) vector and the 2D over-sampling factor are reported. The spatial domain response / distribution represented by the SD 2D-DFT vector may be called an SD beam.

[0060] W ~ k (2L×M v ) is a matrix of combination coefficients (subband complex linear combination (LC) coefficients). For this matrix, up to K0 non-zero coefficients (NZCs) are reported. The report consists of two parts: a bitmap capturing the NZC positions and the quantized NZCs.

[0061] W f,k (N3×M v ) is a matrix consisting of multiple frequency domain (FD) bases (vectors) for layer k. For each layer, M vThere are FD bases (FD DFT bases). If N3 > 19, there are M v DFTs are selected. If N3≦19, log2(C(N3−1,M v -1)) bits are reported, where C(N3-1,M v -1) is N3-1 to M v The number of combinations for selecting 1 is also called the binomial coefficients. The frequency domain response / distribution (frequency response) represented by a linear combination of the FD basis vectors and the combination coefficients may be called an FD beam. The FD beam may correspond to a delay profile (time response).

[0062] A subset of the FD basis is {f1,...,f Mv} where f i is the i-th FD basis for the k-th layer, i∈{1,...,M v}. The PMI subband size is given by CQI subband size / R, where R∈{1,2}. The number of FD bases for a given rank v is M v is ceil(p v ×N3 / R). The number of FD bases is the same for all layers k∈{1,2,3,4}. p v is set by higher layers.

[0063] Matrix W 2,k Each row of represents the channel frequency response of a particular SD beam. If the SD beam has high directivity, the channel taps per beam are limited (the power delay profile becomes sparse in the time domain). As a result, the channel frequency response per SD beam has high correlation (approaches flat in the frequency domain). In this case, the channel frequency response can be approximated by a linear combination of a small number of FD bases. For example, M v = 2, the FD basis f2,f q and the linear combination coefficient d1 0 ,d2 0 and the frequency response associated with the SD beam b0 is given by d10 f2+,d2 0 f q is approximated by

[0064] Maximum gain M v FD bases are selected. M v <<By setting it to N3, W ~ k The overhead of W 2,k The overhead is much smaller than that of M v All or some of the FD bases are used to approximate the frequency response of each SD beam. A bitmap is used to report only the FD bases selected for each SD beam. If no bitmap is reported, all FD bases are selected for each SD beam. In this case, the nonzero coefficients (NZCs) of all FD bases are reported for each SD beam. The maximum number of NZCs in a layer, K, is k NZ ≦K0=ceil(β×2LM v ) and the maximum number of NZCs across all layers is K NZ ≦2K0=ceil(β×2LM v ) where β is set by higher layers.

[0065] W ~ k Each reported complex coefficient in is a separately quantized amplitude and phase. Amplitude Quantization: The polarization specific reference amplitudes are calculated using the table in Figure 1 (amplitude coefficient indicator i 2,3,l Mapping multiple elements of: element k l,p (1) to amplitude coefficient p l,p (1) All other coefficients are quantized using the table in Figure 2 (with amplitude coefficient indicator i 2,4,l Mapping multiple elements of: element k l,i,f (2) to amplitude coefficient p l,i,f (2) Phase quantization: All coefficients are quantized using 16-PSK. For example, φ l,i= exp(j2πc l,i / 16), c l,i ∈{0,...,15}, where c l,i is the associated phase value φ l,i is the phase factor reported by the UE (using 4 bits) for

[0066] Type 2 CSI feedback on PUSCH in Rel. 16 includes two parts. CSI Part 1 has a fixed payload size and is used to identify the number of information bits in CSI Part 2. The size of Part 2 is variable (UCI size depends on the number of non-zero amplitude coefficients (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. The base station knows the size of CSI Part 2 after receiving CSI Part 1.

[0067] In enhanced Type 2 CSI feedback, CSI Part 1 includes RI, CQI, and an indication of the total number of non-zero amplitudes across layers for enhanced Type 2 CSI. The fields in Part 1 are coded separately. CSI Part 2 includes PMI for enhanced Type 2 CSI. Parts 1 and 2 are coded separately. CSI Part 2 (PMI) includes the oversampling factor, the index of the 2D-DFT basis, and the index M of the initial DFT basis (start offset) of the selected DFT window. initial the selected DFT basis for each layer; the non-zero LC coefficients (NZC, amplitude and phase) for each layer; the strongest coefficient indicator (SCI) for each layer; and the amplitude of the strongest coefficient for each layer / polarization.

[0068] The multiple PMI indices (PMI values, codebook indices) associated with different CSI Part 2 information may be as follows for the k-th layer: 1,1 : Oversampling factor i 1,2 : Multiple indices of 2D-DFT basis ・i 1,5: Index (start offset) of the initial DFT basis of the selected DFT window M initial ・i 1,6,k : DFT basis selected for the kth layer i 1,7,k : Bitmap for the kth layer ・i 1,8,k : The strongest coefficient indicator (SCI) for the kth layer. 2,3,k : amplitude of the strongest coefficient (for both polarizations) of the kth layer ・i 2,4,k : the amplitude of the reported coefficient of the kth layer ・i 2,5,k : the phase of the reported coefficients of the kth layer

[0069] i 1,5 and i 1,6,k is the PMI index for DFT-based reporting. Only if N3>19, i 1,5 is reported.

[0070] For CSI Part 2 grouping, for a given CSI report, the PMI information is grouped into three groups (groups 0 to 2). This is important when CSI omission is performed. Index i 2,4,l , i 2,5,l , i 1,7,l Each reported element of is associated with a specific priority rule. Groups 0 to 2 follow: Group 0: Index i 1,1 , i 1,2 , i 1,8,l (l=1,...,v) Group 1: Index i (if reported) 1,5 , index i (if reported) 1,6,l , i 1,7,l The highest (top) v2LM v -floor(K NZ / 2) priority elements, i 2,3,l , i 2,4,l The highest (upper) ceil(K NZ / 2)-v priority elements, i 2,5,l The highest (upper) ceil(K NZ / 2)-v priority elements (l=1,...,v) Group 2: i1,7,l The lowest (lowest) floor(K NZ / 2) priority elements, i 2,4,l The lowest (lowest) floor(K NZ / 2) priority elements, i 2,5,l The lowest (lowest) floor(K NZ / 2) priority elements (l=1,...,v)

[0071] In Type-1 CSI, an SD beam represented by an SD DFT vector is sent toward the UE. In Type-2 CSI, L SD beams are linearly combined and sent toward 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 the FD basis vectors. The channel frequency response corresponds to the power delay profile.

[0072] (Type-2 Port Selection Codebook) In Rel. 16 Type-2 port selection (PS) CSI, the Type-2 PS codebook (CB) does not require the UE to derive an SD beam by considering the 2D-DFT in the regular Type-2 CB. Instead, the base station transmits CSI-RS using K CSI-RS ports that are beamformed by considering a set of SD beams. The UE identifies the best L (≦K) CSI-RS ports and reports their indices in W1.

[0073] For layer k∈{1,2,3,4}, the subband-wise (subband(SB)-wise) precoder generation is given by: W k (N t ×N3) = QW1W ~ k W f,k H (Y3)

[0074] Here, Q(N t ×K) denotes the K SD beams used for CSI-RS beamforming. W1(K×2L) is a block diagonal matrix. W ~k (2L×M) is the LC coefficient matrix. W f,k (N3×M) consists of N3 DFT basis vectors (FD basis vectors). K is set by the upper layer. L is set by the upper layer. P CSI-RS ∈{4,8,12,16,24,32}. P CSI-RS > 4, then L∈{2,3,4}.

[0075] In the CSI / codebook of Type 2 port selection in Rel. 15 / 16, each CSI-RS port #i is assigned to an SD beam (b i ) (Figures 3A and 3B). In the Rel. 17 Type 2 port selection CSI / codebook (extended Type 2 port selection codebook), each CSI-RS port #i is associated with an SD-FD beam pair (SD beam b i and FD beam f i,j (j is the frequency index) (FIGS. 4A and 4B). In this example, ports 3 and 4 are associated with the same SD beam and different FD beams.

[0076] The frequency selectivity of the channel frequency response observed at the UE based on an SD beam-FD beam pair can be reduced to less than the frequency selectivity of the channel frequency response observed at the UE based on an SD beam by delay pre-compensation.

[0077] The main scenario for the Type 2 port selection codebook in Rel. 17 is FDD. Although the channel reciprocity based on SRS measurements is not perfect, the base station can obtain some partial information. By using the SRS measurements at the base station in addition to the CSI reports, the base station can obtain the CSI for determining the DL MIMO precoder. In this case, some CSI reports may be omitted to reduce the CSI overhead.

[0078] In Rel. 17 Type-2 PS CSI, each CSI-RS port is beamformed using an SD beam and FD basis vectors, and each port is associated with an SD-FD pair.

[0079] For a given layer k, information based on the following equation may be reported by the UE: W k (K×N3) = W1W ~ k W f,k H (Y4)

[0080] For W1(K×2L), each matrix block consists of L columns of a K×K identity matrix. The base station transmits K beamformed CSI-RS ports. Each port is associated with an SD-FD pair. The UE selects L ports out of the K and assigns them the PMI (W 1,k ) to the base station. In Rel. 16, each port is associated with an SD beam.

[0081] W ~ k (2L×M v ) is a matrix of combining coefficients (subband complex LC coefficients). Up to K0 NZCs are reported. The report consists of two parts: a bitmap capturing the NZC positions and the quantized NZCs. In certain cases, the bitmap can be omitted. In Rel. 16, the NZC position bitmap is always reported.

[0082] W f,k (N3×M v ) is a matrix consisting of N3 FD basis (FD DFT basis) vectors. v There are FD bases. The base station is f,k You can also erase W f,k If is on, M v additional FD bases are reported. f,k When is off, no additional FD basis is reported. f,k is always reported.

[0083] (Configuration of CSI-RS Resources and CSI Reports) As shown in the example of FIG. 5, the relationship between CSI-RS resources and CSI reports is configured by a CSI measurement configuration (CSI-MeasConfig) configured for each cell, a CSI resource configuration (CSI-ResourceConfig) configured for each BWP, and a CSI report configuration (CSI-ReportConfig).

[0084] The CSI-MeasConfig includes at least one of a non-zero power (NZP) CSI-RS resource configuration nzp-CSI-RS-Resource, an NZP-CSI-RS resource set configuration nzp-CSI-RS-ResourceSet, a CSI-interference measurement (IM) resource configuration csi-IM-Resource, a CSI-IM resource set configuration csi-IM-ResourceSet, an SSB resource set configuration for CSI csi-SSB-ResourceSet, a CSI resource configuration CSI-ResouceConfig, and a CSI reporting configuration CSI-ReportConfig.

[0085] The CSI-ResouceConfig includes at least one of nzp-CSI-RS-ResourceSet, csi-SSB-ResourceSet, csi-IM-ResourceSet, and resource type resourceType (periodic (P) / semi-persistent (SP) / aperiodic (A)).

[0086] The CSI-ReportConfig includes at least one of a resource configuration ID resourceConfigId, a report configuration type reportConfigType (P / SP / A), a reporting amount, a frequency domain configuration, time constraints for each of channel measurement / interference measurement, a group-based beam report, a CQI table, a subband size, and a non-PMI port indication.

[0087] (Doppler Shift) Extending / improving CSI reporting for UEs moving at high / medium speeds by utilizing time-domain correlation / Doppler-domain information is being considered. For example, improving the Type-2 codebook of Rel. 16 / 17 without changing the spatial and frequency domain basis, and reporting time-domain channel characteristics measured via tracking CSI-RS (TRS) from the UE are being considered.

[0088] The channel coherent time (CCT) depends on the maximum Doppler shift. The channel coherent time is the time during which the measured channel characteristics are available or until the measured channel characteristics become unavailable (channel aging). The maximum Doppler shift is estimated by the relative velocity between the transmitter and receiver. The channel coherent time T c is 1 / Δf max where Δf max = v / λ. As the UE's moving speed increases, the channel coherence time decreases. For example, at a carrier frequency of 4.5 GHz, when the moving speed exceeds approximately 25 km / h, the channel coherence time decreases to less than 10 ms. The problem is how to deal with such high moving speeds and short channel coherence times.

[0089] TRS is supported to track Doppler shift. However, TRS has the following issues: - The number of ports per CSI-RS resource set is limited to one. Each CSI-RS resource uses a single port. - The configurable period is 10 ms or more. - CSI reporting for TRS is not assumed. There is no reporting configuration for P-TRS. Reporting can be configured, but the report quantity (reportQuantity) can only be set to "none". A maximum of 16 CSI-RS resources can be used per CSI-RS resource set.

[0090] The TRS is allocated to resources in the time domain and frequency domain. To measure the effect of Doppler shift, multiple RSs in the time domain are required within a specific frequency domain resource.

[0091] The CMR can be used to measure the effect of Doppler shift, but the RS used for the measurement depends on the UE implementation.

[0092] The amount of CSI reporting does not support information about Doppler shift. Through the CSI codebook (PMI), the UE reports information for determining W = W1W2, where W1 is the wideband characteristic and indicates the spatial beam, and W2 is the subband characteristic and indicates the amplitude / phase coefficient for each spatial beam.

[0093] Regarding measurements related to Doppler shift, there are possible cases: Case 1 in which the UE performs measurements based on CSI-RS, and Case 2 in which the base station performs measurements based on SRS. Regarding determination of the influence of Doppler shift, there are possible cases: Case 1-1 in which the UE performs determination based on CSI-RS measurement results, Case 1-2 in which the base station performs determination based on CSI-RS measurement results reported by the UE, and Case 2-1 in which the base station performs determination based on SRS measurement results.

[0094] (Timing Relationship Between CSI-RS Measurement and CSI Reporting) CSI-RS measurement windows and CSI reporting windows are considered. Within a CSI-RS measurement window, one or more CSI-RS occasions may be measured. The reported CSI may be associated with a CSI reporting window.

[0095] Assuming a CSI report in slot n, the length of the basis vectors in the Doppler domain / time domain may be N4. meas Within a CSI measurement window of W −1, one or more CSI occasions for calculation of a CSI report may be measured, where k may be a slot index and Wmeas may be the measurement window length (number of slots). The CSI occasion may be configured in the CSI-ReportConfig. Slot [l,l+W CSI −1] may be associated with a CSI report in slot n, where l may be a slot index and W CSI may be the reporting window length (number of slots). ref It may be expressed as:

[0096] For Type 2 codebook refinement, the CSI reporting and measurement (CSI-RS measurement window / CSI reporting window) may follow at least one of the following options, as shown in FIG.

[0097] [Option 1] At the border of the CSI reporting window, CSI reference resource slot n is set as follows: ref may be considered. [Option 1. A] l+W CSI -1≦n ref [[Option 1. B]]n ref ≦l [[Option 1. C]]l<n ref and n ref ≦l+W CSI -1

[0098] [Option 2] Reporting slot n may be considered a boundary of the CSI reporting window as either: [Option 2.A] l + W CSI -1≦n [[Option 2. B]] n≦l [[Option 2. C]] l<n and n≦l+W CSI -1

[0099] [Option 3] The last slot k+W of the measurement window is placed at the boundary of the CSI reporting window, as follows: meas -1 may be considered. [Option 3. A] Special case l = k, W CSI =W meas In l+W CSI -1≦k+W meas -1 [[Option 3. B]]k+W meas -1≦l [Option 3.C] Special case l=k, n=l+WCSI or l=k, n<l+W CSI In this case, l<k+W meas -1 and k+W meas -1≦l+W CSI -1

[0100] In addition, in the existing specifications, n ref =nn ref , l=n ref , W CSI = 1, k ≤ n ref , W meas =1.

[0101] If the CSI reporting window overlaps with a CSI-RS occasion, the reported CSI can also be interpreted as being obtained by actual measurement. If the CSI reporting window does not overlap with a CSI-RS occasion, the reported CSI can also be interpreted as being obtained by prediction at the UE. The CSI report can also be interpreted as having CSI obtained by actual measurement (measured CSI) and CSI obtained by prediction at the UE (predicted CSI) (options 1.C, 3.C).

[0102] The codebook structure may be one of several structures:

[0103] [Structure 1] Time domain basis where W is N Tx It is a matrix with N3 rows and N4 columns. f is a matrix with N3 rows and M columns (same as in Rel. 16). W1 is N Tx W2 is a matrix with 2LM rows and D columns (same as in Rel. 16). W t is a matrix with N4 rows and D columns.

[0104] [Structure 2] Doppler domain basis where W is N Tx It is a matrix with N3 rows and N4 columns. f is a matrix with N3 rows and M columns (same as in Rel. 16). W1 is N Tx W2 is a matrix with 2L rows and MD columns (same as in Rel. 16). W dis a matrix with N4 rows and D columns.

[0105] N4 is the number of time domain units (time domain bases). D is the number of compressed / selected time domain units (time domain bases).

[0106] There is a trade-off between time domain granularity and overhead: a larger D results in finer reporting precision and more overhead; a smaller D results in coarser reporting precision and less overhead.

[0107] (Application of Artificial Intelligence (AI) Technology to Wireless Communications) With regard to future wireless communications technologies, the use of AI technology such as machine learning (ML) for network / device control and management is being considered.

[0108] For example, for future wireless communication technologies, the use of AI techniques is being considered to improve channel state information (CSI) feedback (e.g., reduced overhead, improved accuracy, prediction), improve beam management (e.g., improved accuracy, prediction in the time / space domain), and improve positioning (e.g., improved position estimation / prediction).

[0109] 7 is a diagram illustrating an example of a framework for managing an AI model. In this example, each stage related to an AI model is shown as a block. This example is also expressed as life cycle management of an AI model.

[0110] The data collection stage corresponds to a stage of collecting data for generating / updating an AI model. The data collection stage may include data organization (e.g., determining which data to transfer for model training / model inference), data transfer (e.g., transferring data to an entity (e.g., UE, gNB) that performs model training / model inference), etc.

[0111] In the model training stage, model training is performed based on the data (training data) transferred from the collection stage. This stage may include data preparation (e.g., performing data preprocessing, cleaning, formatting, conversion, etc.), model training / validation, model testing (e.g., verifying whether the trained model meets a performance threshold), model exchange (e.g., transferring the model for distributed learning), and model deployment / update (deploying / updating the model to entities that will perform model inference).

[0112] In the Model Inference stage, model inference is performed based on the data (inference data) transferred from the Collection stage. This stage may include data preparation (e.g., performing data preprocessing, cleaning, formatting, transformation, etc.), model inference, model monitoring (e.g., monitoring the performance of model inference), model performance feedback (feeding back model performance to the entity training the model), and output (providing model output to the actor).

[0113] The Actor stage may include action triggers (e.g., deciding whether to trigger an action on another entity), feedback (e.g., feeding back information needed for training data / inference data / performance feedback), etc.

[0114] For example, training of a model for mobility optimization may be performed in, for example, Operation, Administration and Maintenance (Management) (OAM) / gNodeB (gNB) in a network (NW). In the former case, interoperability, large-capacity storage, operator manageability, and model flexibility (feature engineering, etc.) are advantageous. In the latter case, the latency of model updates and the need for data exchange for model deployment are advantageous. Inference of the above model may be performed in, for example, a gNB.

[0115] Also, depending on the use case, the entity that performs the training / inference may be different.

[0116] For example, for AI-assisted beam management based on measurement reports, the OAM / gNB may perform model training and the gNB may perform model inference.

[0117] For AI-assisted UE-assisted positioning, a Location Management Function (LMF) may perform model training and the LMF may perform model inference.

[0118] For CSI feedback / channel estimation using an autoencoder, the OAM / gNB / UE may perform model training and the gNB / UE may perform model inference (jointly).

[0119] For AI-assisted beam management or AI-assisted UE-based positioning based on beam measurements, the OAM / gNB / UE may perform model training and the UE may perform model inference.

[0120] An identifier (ID)-based model approach can be one of the methods for managing AI models in such a scenario. For example, the NW / gNB does not know the details of the AI ​​model, but for AI model management, it can know only some information about the AI ​​model (e.g., which ML model is used in the UE and for what purpose).

[0121] In the present disclosure, the UE / BS may input channel state information, reference signal measurements, etc. to the ML model and output highly accurate channel state information / measurements / beam selection / position, future channel state information / radio link quality, etc.

[0122] In the present disclosure, AI may be interpreted as an object (also called a subject, object, data, function, program, etc.) that has (performs) at least one of the following characteristics: - Estimation based on observed or collected information; - Selection based on observed or collected information; - Prediction based on observed or collected information.

[0123] In the present disclosure, an object may be, for example, an apparatus, device, etc., such as a terminal or a base station. Also, in the present disclosure, an object may correspond to a program / model / entity that operates in the apparatus.

[0124] Also, in the present disclosure, an ML model may be interpreted as an object having (implementing) at least one of the following characteristics: - Generating an estimate by feeding information; - Predicting an estimate by feeding information; - Discovering features by feeding information; - Selecting an action by feeding information.

[0125] In addition, in this disclosure, AI, AI / ML, AI / ML model, ML model, model, AI model, predictive analytics, predictive analysis model, etc. may be interchangeable. In addition, the ML model may be derived using at least one of regression analysis (e.g., linear regression analysis, multiple regression analysis, logistic regression analysis), support vector machine, random forest, neural network, deep learning, etc. In this disclosure, the model may be interchangeable with at least one of an encoder, a decoder, a tool, etc.

[0126] The ML model outputs at least one piece of information, such as an estimate, a prediction, a selected action, or a classification, based on input information.

[0127] ML models may include supervised learning, unsupervised learning, and reinforcement learning. Supervised learning may be used to learn general rules that map inputs to outputs. Unsupervised learning may be used to learn features of data. Reinforcement learning may be used to learn behaviors to maximize a goal.

[0128] In the present disclosure, terms such as generate, calculate, derive, etc. may be interchangeable. In the present disclosure, terms such as implement, operate, operate, execute, etc. may be interchangeable. In the present disclosure, terms such as train, learn, update, retrain, etc. may be interchangeable. In the present disclosure, terms such as infer, after-training, live use, actual use, etc. may be interchangeable. Signal may be interchangeable with signal / channel.

[0129] (CQI) The UE derives (calculates) the highest CQI value (reported in UL slot n) that satisfies the following conditions (1) to (4).

[0130] (1) The block error probability of a single PDSCH TB with a CQI index and CSI reference resource shall not exceed the following values: 0.1 if the cqi-table in CSI-ReportConfig is set to a predetermined table (table 1 or table 2). 0.00001 if the cqi-table in CSI-ReportConfig is set to a predetermined table (table 3).

[0131] (2) The UE makes the following assumptions about the PDSCH to derive the CQI / PMI / RI: ・The PDSCH and DMRS symbols are 12 symbols (the first 2 symbols are occupied by control signals). ・The same bandwidth is configured for CQI reporting. ・Frontloading symbols and additional DMRS symbols based on the DMRS-DownlinkConfig. ・The PRB bundling size is assumed to be PRB. ・The UE may assume PDSCH transmission using a precoding matrix corresponding to the reported PMI.

[0132] (3) CQI observation interval: Unlimited in the time domain unless otherwise specified. Unlimited in the frequency domain.

[0133] (4) For each subband CQI value (index) s, a 2-bit subband differential CQI is defined as follows (see, for example, FIG. 8A). FIG. 8A shows the relationship between the subband differential CQI value and the offset level: Subband offset level (s) = subband CQI index (s) - wideband CQI index.

[0134] As described above, in Rel. 15 / 16, a subband CQI value (index) is reported as a subband differential CQI value (subband offset level), which is the difference between the subband CQI value (index) and the wideband CQI value (index). As shown in Fig. 8B, the subband CQI value is represented using four offset levels relative to the wideband CQI value (CQI index = 6). In this case, the subband differential CQI value is represented by two bits.

[0135] Rel. 17 supports reporting subband CQI values ​​with 4 bits for better reliability and resource efficiency. As shown in Fig. 8C, the subband CQI values ​​may be represented as absolute values ​​rather than differential values.

[0136] In the present disclosure, the terms subband differential CQI value, subband offset level, differential value, and offset level may be interpreted interchangeably.

[0137] (CQI Value Based on Precoding Matrix) If configured to report a CQI index, the UE shall assume the following in the CSI reference resource to derive the CQI index and, if configured, to derive the PMI and RI:

[0138] For the PDSCH transmission scheme, the UE may assume that PDSCH transmission is performed on up to eight transmission layers. For CQI calculation, the UE assumes that the PDSCH signals on antenna ports of the set [1000,...,1000+v-1] of v layers are equivalent to the corresponding symbols transmitted on antenna ports [3000,...,3000+P-1]. This signal is expressed as in Equation (1). x(i) is expressed as in Equation (2).

[0139]

[0140]

[0141] In equation (2), x(i) is a vector of PDSCH symbols from the layer mapping. p∈[1,2,4,8,12,16,24,32] is the number of CSI-RS ports. If only one CSI-RS port is configured, W(i) is 1. If the upper layer parameter reportQuantity of the CSI-ReportConfig in which CQI is reported is either 'cri-RI-PMI-CQI' or 'cri-RI-LI-PMI-CQI', W(i) is the precoding matrix corresponding to the reported PMI applied to x(i). If the upper layer parameter reportQuantity of the CSI-ReportConfig in which CQI is reported is set to 'cri-RI-CQI', W(i) is set to a specific precoding matrix. The corresponding PDSCH signals transmitted on antenna ports [3000,...,3000+P-1] are adjusted so that the ratio of EPRE to CSI-RS EPRE is equal to a particular ratio.

[0142] (AI-based CSI feedback) As a representative sub-use case, space-frequency domain CSI compression using a two-sided AI model is being considered.

[0143] FIG. 9 is a diagram illustrating an example of AI-based CSI feedback. The UE performs pre-processing, AI / ML-based CSI generation, and post-processing on CSI measurement results and the like, and transmits encoded bits (CSI feedback information) to the NW (base station). In this AI / ML-based CSI generation, CSI compression may be performed. The NW (base station) performs pre-processing, AI / ML-based CSI reconstruction, and post-processing on the received bits to obtain CSI (channel / precoding matrix). The NW (base station) may calculate a precoding matrix based on the channel matrix output from the AI / ML model.

[0144] In this case, it is desirable to select and adjust AI / ML so that the CSI acquired by the NW (base station) is close to the target CSI, which may mean the CSI calculated based on UE measurements, the ideal CSI (simulated CSI, fixed value), or the actual CSI.

[0145] (CQI Calculation) When applying CSI compression (e.g., using the AI / ML model), the UE transmits information obtained by compressing the CSI (e.g., the Encoded bits in FIG. 9 ) to the NW (base station). Then, for CQI calculation, the UE may assume that the following precoding matrix is ​​applied to PDSCH transmission. Then, the UE may calculate the CQI based on the following precoding matrix:

[0146] [Aspect 1.1] When CSI compression is applied, the UE assumes that a precoding matrix calculated based on the AI / ML model output in the base station is applied to PDSCH transmission. That is, the UE calculates the CQI based on the precoding matrix actually obtained using the AI / ML model. If the UE has an encoder and decoder, it can derive the precoding matrix.

[0147] [Aspect 1.2] When CSI compression is applied, the UE assumes that a precoding matrix derived based on the output of an ideal AI / ML model (target CSI), e.g., CSI calculated based on UE measurements, is applied to PDSCH transmission. In this example, the target CSI can be derived even if the UE does not have a decoder. However, the performance difference between the ideal output of the target CSI / model and the actual output (CSI) is ignored.

[0148] [Aspect 1.3] When CSI compression is applied, the UE assumes that a precoding matrix derived based on the expected output of the AI / ML model (output expected for the AI / ML model) at the base station is applied to PDSCH transmission. The UE may derive the expected output of the model based on the target CSI (CSI calculated from measurements) and expected performance information. The expected performance information (information about the AI / ML model) may be calculated by the UE, indicated / set by the base station (gNB), or transmitted from a server or the like. The expected performance information may be expected estimation error information (such as the expected error fluctuation range).

[0149] In this example, even if the UE does not have a decoder, it can derive the expected output (CSI) based on the target CSI and the expected performance, although there is a performance difference between the expected output of the model and the actual output.

[0150] [Aspect 1.4] When CSI compression is applied, the UE assumes that a precoding matrix calculated based on a channel matrix derived based on the output of the AI / ML model in the base station is applied to PDSCH transmission for CQI calculation. How to calculate the precoding matrix from the channel matrix may be determined by the UE or may be specified in the specifications. This example can be applied to CSI compression for a channel matrix. Furthermore, since the CQI is calculated based on the actually obtained channel matrix, the UE, if it has an encoder and decoder, can derive the obtained channel matrix.

[0151] (CSI Prediction) As described above, in future wireless communication systems (e.g., Rel. 18), improvement of communication performance for terminals moving at high / medium speeds is being considered. For example, one CSI report (one reporting instance) may include multiple CSIs within a certain time domain (CSI reporting window). In the present disclosure, the CSI reporting window may refer to a window to which the reported CSI is associated.

[0152] 10 is a diagram illustrating an example of CSI reporting. As shown in FIG. 10, when a CSI reporting window overlaps with a CSI-RS occasion, the reported CSI may be the CSI after the CSI reference resource at the boundary of the CSI-RS occasion or the CSI corresponding to CSI reporting slot n. The fact that the CSI-RS occasion is before the CSI reference resource may be specified, for example, by a specification.

[0153] CSI prediction has also been proposed as a sub-use case using the AI / ML model. The AI / ML model deployed in the UE / gNB may predict CSI within a certain time domain. Even in such a case, one CSI report (one reporting instance) can include multiple CSIs within a certain time domain (CSI reporting window). Multiple CSIs allow for the recognition of time-series changes in CSI, which is beneficial for CSI prediction on the gNB side. Additionally, multiple predicted CSIs (predicted CSIs) may be reported for CSI prediction on the UE side.

[0154] Another sub-use case using the AI / ML model is temporal spatial frequency domain CSI compression. In this case, one CSI report (one reporting instance) can include multiple CSIs within a certain time domain (CSI reporting window).

[0155] Meanwhile, there are three issues regarding CQI in CSI prediction: [Issue 1] Number of CQIs, [Issue 2] Calculation of CQIs, [Issue 3] Prediction of only CQIs.

[0156] Regarding problem 1, it is assumed that the reported PMI / CSI includes multiple precoding matrices. In this case, the following issues need to be considered: (Problem 1.1) whether CQIs corresponding to the multiple precoding matrices are required, and (Problem 1.2) how to associate (represent) multiple CQIs for one CSI report.

[0157] Regarding Problem 2, it is assumed that the CQI is calculated based on the precoding matrix associated with the PMI and the PDSCH symbols (channel) corresponding to the antenna port. In this case, the following two points need to be considered: (Problem 2.1) whether the CQI should be calculated based on the predicted precoding matrix, or (Problem 2.2) whether the CQI should be calculated based on the predicted PDSCH symbols (future channel) for the corresponding antenna port.

[0158] Regarding problem 3, there may be a case where only the CQI is predicted even when the precoding matrix is ​​not predicted. In this case, how to predict only the CQI is an issue to be considered.

[0159] Therefore, the present inventors have devised an appropriate method for reporting CSI. According to one aspect of the present disclosure, it is possible to appropriately measure, predict, and report on the influence of movement.

[0160] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0161] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0162] In the present disclosure, terms such as notify, activate, deactivate, indicate (or indicate), select, configure, update, and determine may be read interchangeably. In the present disclosure, terms such as support, control, controllable, operate, and operate may be read interchangeably.

[0163] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0164] 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, positioning protocol (e.g., LTE Positioning Protocol (LPP)) messages, etc., or a combination thereof.

[0165] In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0166] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0167] In the present disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In the present disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0168] In the present disclosure, the terms panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmitting entity, Transmission / Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relation, SRS Resource Indicator (SRI), Control Resource Set (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), resource (e.g., reference signal resource, SRS resource), resource set (e.g., reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, Quasi-Co-Location (QCL), QCL assumption, etc. may be read as interchangeable.

[0169] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. The "spatial relationship information" may be interchangeable with "set of spatial relationship information," "one or more pieces of spatial relationship information," etc. The TCI state and the TCI may be interchangeable with each other.

[0170] In the present disclosure, the terms drop, abort, cancel, puncture, rate match, postpone, do not transmit, etc. may be read interchangeably.

[0171] (Wireless communication method) In the present disclosure, a CSI report, a report instance, a PMI, a precoding matrix, etc. may be interchangeable. Also, a CQI value, a CQI bit width, a CQI field, and a CQI index may be interchangeable. Also, CQI and CSI may be interchangeable. Also, a precoding matrix and a set of amplitude / phase coefficients may be interchangeable.

[0172] First Embodiment The first embodiment relates to the number of CQIs.

[0173] A UE may report N CQIs in one CSI report / reporting instance / PMI, where each CQI may correspond to a different time (e.g., symbol, slot, millisecond, subframe) or CSI occasion within the CSI reporting window, i.e., one CSI report may include N CQIs (N is an integer equal to or greater than 1).

[0174] N may be determined based on at least one of the following options (conditions): - Option 1: number of precoding matrices / number of PMIs reported in one CSI report / reporting instance / PMI, - Option 2: information associated with the activated model, - Option 3: information related to the registered / configured model, - Option 4: information from the NW, - Option 5: UE capabilities, - Option 6: value defined in the specification, - Option 7: depending on the UE implementation (e.g. a UE may report a number N of CQIs in CSI#1 and a corresponding CQI in CSI#2), - Option 8: window length (e.g. number of slots) corresponding to the time domain of the reported CSI / PMI, - Option 9: unit of time or delay domain associated with one precoding matrix / CQI, - Option 10: a combination of options 1 to 9.

[0175] As an example of option 8, the UE may determine the minimum or maximum value from among the above options as N. As another example, the UE may determine the number of CQIs per precoding matrix or the number of precoding matrices per CQI based on information from the NW.

[0176] 11 is a diagram illustrating an example of a CSI report according to the first embodiment. As illustrated in FIG. 11, a CSI report in slot n may include, for example, three CQIs (CQI#1-#3) corresponding to CSI#1-#3. Here, CSI#1-#3 (CQI#1-#3) may correspond to three different time instances within a CSI reporting window, respectively.

[0177] [Variations] The UE may report N' CQIs corresponding to one reported precoding matrix associated with a PMI, where each CQI may correspond to a different time (e.g., symbol, slot, millisecond, subframe) or CSI occasion within the CSI reporting window. That is, the UE may report N' CQIs per precoding matrix (one precoding matrix may be associated with a certain PMI, and N' CQIs may be associated with the one precoding matrix).

[0178] As described above, there is a trade-off between the granularity of CSI reporting (time domain granularity) and overhead. For example, it is expected that the overhead of a precoding matrix is ​​larger than that of a CQI. Therefore, by associating multiple CQIs with one precoding matrix, it is possible to report CQIs with finer granularity while reducing the overhead caused by the precoding matrix.

[0179] The UE may report one CQI corresponding to the N″ reported precoding matrices associated with the PMI, where each precoding matrix may correspond to a different time (e.g., symbol, slot, millisecond, subframe) or CSI occasion within the CSI reporting window. That is, one CQI may be associated with the N″ precoding matrices.

[0180] N' and N'' may be determined based on at least one of options 1 to 10 above.

[0181] According to the first embodiment described above, the UE can appropriately determine the number of CQIs in one CSI report / reporting instance / PMI.

[0182] Second Embodiment The second embodiment relates to the bit width of the CQI (CQI value).

[0183] When reporting N CQIs in one CSI report / reporting instance / PMI, the UE may determine the bit width of the CQIs based on at least one of the following options (conditions): The UE can report one CQI using the bit width determined based on at least one of the following options:

[0184] - Option 1: Value defined in the specification (e.g. 2 bits or 4 bits), - Option 2: Information associated with the activated model, - Option 3: Information related to the registered / configured model, - Option 4: Information from the NW (existing parameters such as cqi-BitsPerSubband may be used or new parameters may be adopted), - Option 5: UE capabilities, - Option 6: Relative time / occasion associated with a certain CQI within the CSI reporting window, - Option 7: Dependent on the UE implementation (e.g. the UE may report the bit width of the CQI in CSI#1 and the corresponding CQI in CSI#2), - Option 8: Window length (e.g. number of slots) corresponding to the time domain of the reported CSI / PMI, - Option 9: Time or delay domain unit associated with one precoding matrix / CQI, - Option 10: A combination of Options 1 to 9.

[0185] Regarding option 6, the bit width of the CQI may be determined based on (1) a difference between a CQI value (CQI field) corresponding to a certain time instance among multiple CQIs in a CSI reporting window. More specifically, the bit width may be determined based on the first / last / middle CQI value among multiple CQI values ​​(CQI field) in one CSI report / CSI reporting window (using a specific CQI as a reference). Here, the middle CQI value may be indicated by a field represented as ceil(N / 2) or floor(N / 2). It is assumed that the middle CQI value can be an average value among multiple CQI values. Therefore, when the middle CQI value is used as a reference, the difference between the middle CQI value and other CQI values ​​(the CQI values ​​before and after it) becomes relatively small, and the bit width (other CQI values) can be made small.

[0186] Regarding option 6, the bit width of the CQI may be determined (2) based on the oldest / latest / middle CQI value associated with a time (e.g., symbol, slot, millisecond, or subframe) or occasion among multiple CQI values ​​(CQI fields) in one CSI report / PMI (using a specific CQI as a reference). The middle CQI value is assumed to be an average value among multiple CQI values. Therefore, when the middle CQI value is used as a reference, the difference from other CQI values ​​(the CQI values ​​before and after it) becomes relatively small, and the bit width (of other CQI values) can be reduced.

[0187] Each of the above options can be applied to both the wideband CQI index and the sub-band CQI index. Different options may be applied to each of the wideband CQI index and the sub-band CQI index.

[0188] According to the second embodiment described above, the bit width can be flexibly determined for each of a plurality of CQIs.

[0189] Third Embodiment The third embodiment relates to a relative expression of a CQI value (CQI index), which can be applied to both subbands and widebands.

[0190] The UE may report a relative CQI value based on other CQI values ​​in one CSI report / reporting instance / PMI.

[0191] [Embodiment 3.1] Within one CSI report, the UE may determine a corresponding CQI index based on a CQI index corresponding to a CQI field (e.g., one field) before the corresponding CQI and a difference value (corresponding offset level) thereof.

[0192] [Embodiment 3.2] Within one CSI report, the UE may determine a corresponding CQI index based on a (related) CQI index corresponding to a time / occasion (e.g., one) earlier than the corresponding CQI and its difference value (corresponding offset level).

[0193] Fig. 12 is a diagram showing an example of a CSI reporting window (corresponding to options 3.1-3.2) according to the third embodiment. Fig. 12 shows a case where three CQI values ​​(CQI#1-#3 / CSI#1-#3) at different time instances are included in one CSI reporting window. CQI#1-#3 / CSI#1-#3 may correspond to a time series in this order.

[0194] As shown in Figure 12, for example, CQI #1 indicates the CQI index corresponding to CSI #1. In this case, the CQI index (CQI #2) corresponding to CSI #2 may be indicated by CQI #1 + an offset level for CQI #2 (a difference value from CQI #1). Also, the CQI index (CQI #3) corresponding to CSI #3 may be indicated by CQI #2 + an offset level for CQI #3 (a difference value from CQI #2). In this way, the UE may determine the corresponding CQI index based on the previous CQI index.

[0195] [Embodiment 3.3] The UE may determine a corresponding CQI index based on a reference CQI index and its difference value (corresponding offset level).

[0196] [Option 3.3.1] The UE may determine the corresponding CQI index based on the CQI index indicated in a specific (Xth) CQI field within one CSI reporting window.

[0197] The reference CQI index may be determined based on, for example, the first CQI field, the last CQI field, the ceil(N / 2)th field, or the floor(N / 2)th field within one CSI reporting window.

[0198] [Option 3.3.2] The UE may determine the corresponding CQI index based on the CQI index (CSI) corresponding to the Xth latest / oldest time / occasion within one CSI reporting window.

[0199] The reference CQI index may be determined, for example, based on either the most recent CSI within one CSI reporting window, the ceil(N / 2)th oldest CSI, or the time / occasion of the floor(N / 2)th oldest CSI.

[0200] 13 is a diagram showing another example of a CSI reporting window (corresponding to Options 3.3.1-3.3.2) according to the third embodiment. As shown in FIG. 13, the UE may determine a corresponding CQI index based on a CQI index corresponding to the oldest CSI among multiple CQIs (CSIs) in a certain CSI reporting window.

[0201] 13, for example, CQI#1 indicates the CQI index corresponding to CSI#1. In this case, the CQI index (CQI#2) corresponding to CSI#2 may be indicated by CQI#1+an offset level for CQI#2 (a difference value from CQI#1). Also, the CQI index (CQI#3) corresponding to CSI#3 may be indicated by CQI#1+an offset level for CQI#3 (a difference value from CQI#1). In this way, the UE may determine the corresponding CQI index based on one (Xth) CQI index within the CSI reporting window.

[0202] [Option 3.3.3] The UE may determine the corresponding CQI index based on a reported CQI index (reference CQI index), i.e., the reference CQI index may not necessarily be related to other CQIs within one CSI reporting window.

[0203] The reference CQI index (reference CQI index) may be determined based on, for example, a specific CQI within a previous CSI reporting window (a specific CQI based on past CSI reports). The reference CQI index may be notified from the NW using a higher layer parameter, or may be determined based on a rule defined in advance in a specification. The value of the reference CQI index may be indicated by a specific value, or may be indicated by a CQI index corresponding to the maximum / minimum value among multiple measured values.

[0204] 14 is a diagram illustrating another example of a CSI reporting window (corresponding to Option 3.3.3) according to the third embodiment. As shown in FIG. 14, the UE may determine a corresponding CQI index based on a reference CQI index.

[0205] 14, for example, a CQI index (CQI#1) corresponding to CSI#1 may be represented by a reference CQI index plus an offset level for CQI#1 (a difference value from the reference CQI index), a CQI index (CQI#2) corresponding to CSI#2 may be represented by a reference CQI index plus an offset level for CQI#2 (a difference value from the reference CQI index), and a CQI index (CQI#3) corresponding to CSI#3 may be represented by a reference CQI index plus an offset level for CQI#3 (a difference value from the reference CQI index).

[0206] In this way, by using a reference CQI index (reference CQI index), it is possible to flexibly determine (specify) a corresponding CQI index.

[0207] [Embodiment 3.4] The above-described embodiments 3.1 to 3.3 can be applied to both wideband CQI indexes and subband CQI indexes. Different embodiments may be applied to each of the wideband CQI index and the subband CQI index. In embodiment 3.4, application to both the wideband and the subband will be described.

[0208] [Wideband CQI Calculation] <Option 3.4.1> In one CSI report, the wideband CQI index may be calculated based on (the value of) another wideband CQI index and its differential value (corresponding offset level). <Option 3.4.2> The wideband CQI index may be calculated based on (the value of) a reference CQI index and its differential value (corresponding offset level).

[0209] [Subband CQI Calculation] <Option 3.4.3> The CQI index of a subband may be calculated based on (the value of) the wideband CQI index corresponding to CSI of the same time / occasion and its differential value (corresponding offset level). <Option 3.4.4> The CQI index of a subband may be calculated based on another subband CQI index corresponding to the same subband, and (the value of) another subband CQI index corresponding to CSI of a different time / occasion and its differential value (corresponding offset level). <Option 3.4.5> The CQI index of a subband may be calculated based on a reference CQI index and its differential value (corresponding offset level). Here, a common value for the reference CQI index may be applied to all subbands, or may be reported for each subband.

[0210] According to the third embodiment described above, it is possible to appropriately determine the CQI values ​​(CQI indices) corresponding to the respective CQIs within one CSI reporting window.

[0211] <Fourth Embodiment> The fourth embodiment relates to a method for calculating a CQI.

[0212] [Embodiment 4.1] The UE may assume that a precoding matrix shown in any of the following options 4.1.1-4.1.2 is applied to PDSCH transmission for CQI calculation when certain parameters are configured / certain AI / ML models are activated, and may calculate the CQI based on the applied precoding matrix.

[0213] <Option 4.1.1> - Precoding matrix derived based on reported PMI. The UE may derive a precoding matrix based on the reported PMI. In this case, the UE may calculate a CQI based on one / several of the multiple precoding matrices. For example, the UE may calculate one corresponding CQI for each precoding matrix. According to Option 4.1.1, when CSI prediction is applied, the UE can calculate the CQI based on a predicted precoding matrix (predicted precoding matrix).

[0214] <Option 4.1.2> - Precoding matrix derived based on CSI calculated from measurements of CSI-RS occasions. The UE may derive a precoding matrix based on CSI calculated from measurements of CSI-RS occasions. According to option 4.1.2, the UE does not need to calculate CQI based on the predicted precoding matrix / predicted channel. This reduces the amount of calculations on the UE side.

[0215] 15 is a diagram illustrating an example of a CSI report according to the fourth embodiment (corresponding to embodiment 4.1). In FIG. 15, when the above-described option 4.1.1 (Alt1) is applied, the CSI report in slot n may include, for example, three CQIs (CQI#1-#3) corresponding to precoding matrices #1-#3. Here, CSI#1-#3 (CQI#1-#3) may correspond to three different time instances within the CSI reporting window, respectively.

[0216] Also, in Figure 15, when the above-mentioned Option 4.1.2 (Alt2) is applied, the CSI report in slot n may include one CQI (CQI#0) corresponding to, for example, precoding matrix #0, where CSI#0 (CQI#0) may correspond to a certain time instance within the CSI-RS occasion.

[0217] [Embodiment 4.2] When certain parameters are configured / certain AI / ML models are activated, the UE may assume that a vector of PDSCH symbols shown in any of the following options 4.2.1-4.2.3 is applied to PDSCH transmission for CQI calculation. The UE may calculate the CQI based on the applied vector of PDSCH symbols. Here, the vector of PDSCH symbols may be at least one of the following: Vector of PDSCH symbols from layer mapping: x(i), Vector of PDSCH symbols from resource element mapping: y(i).

[0218] <Option 4.2.1> Vector of PDSCH symbols at time / occasion associated with the reported precoding matrix. The UE may calculate the CQI based on the vector of PDSCH symbols at time associated with one precoding matrix in the reported PMI, for example. According to option 4.2.1, the UE can realize predicted CQI calculation taking into account the future channel.

[0219] <Option 4.2.2> Vector of PDSCH symbols at time / occasion associated with configured / reported parameters. The UE may calculate the CQI based on the vector of PDSCH symbols at time associated with the configured parameters received from / reported to the NW. According to option 4.2.2, the UE can realize predicted CQI calculation taking into account the future channel.

[0220] <Option 4.2.3> Vector of PDSCH symbols at time / occasion based on CSI-RS occasion. According to option 4.2.3, the UE does not need to calculate the CQI considering the future channel, which reduces the amount of calculation on the UE side.

[0221] 16 is a diagram illustrating an example of a CSI report according to the fourth embodiment (corresponding to embodiment 4.2). In FIG. 16, when the above-described option 4.2.1 (Alt1) / option 4.2.2 (Alt2) is applied, the CSI report in slot n may include, for example, three CQIs (CQI#1-#3) corresponding to CSI#1-#3. Here, CSI#1-#3 (CQI#1-#3) may correspond to three different time instances within the CSI reporting window, respectively.

[0222] Also, in Figure 16, when the above-mentioned Option 4.2.3 (Alt3) is applied, the CSI report in slot n may include one CQI (CQI#0) corresponding to, for example, CSI#0, where CSI#0 (CQI#0) may correspond to a certain time instance within the CSI-RS occasion.

[0223] [Embodiment 4.3] The UE may decide to apply any of the above-mentioned embodiments 4.1-4.2 based on at least one of the following options: - Option 1: information associated with the activated model, - Option 2: information related to the registered / configured model, - Option 3: information from the NW, - Option 4: UE capabilities, - Option 5: value defined in the specification, - Option 6: depending on the UE implementation (e.g., the UE may report the option to be applied in CSI#1 and the corresponding CQI in CSI#2), - Option 7: based on each option of embodiments 4.1-4.2, - Option 8: window length (e.g., number of slots) corresponding to the time domain of the reported CSI / PMI, - Option 9: unit of time or delay domain associated with one precoding matrix / CQI, - Option 10: a combination of options 1 to 9.

[0224] [Embodiment 4.4 (Variation)] The above-described embodiments 4.1 to 4.3 and aspects 1.1 to 1.4 related to CSI compression may be applied in combination. This allows the UE to calculate the CQI taking into account temporal spatial frequency domain CSI compression. When applying the temporal spatial frequency domain CSI compression, the UE needs to consider the following points in the CQI calculation: - the time associated with the precoding matrix and the vector of PDSCH symbols, - the precoding matrix in the CQI calculation is based on the target CSI (CSI measured at the UE) / expected CSI (target CSI including expected noise) / obtained CSI (CSI reconfigured at the gNB).

[0225] According to the fourth embodiment described above, the UE can calculate the CQI based on the predicted precoding matrix / channel, and can also calculate the CQI even if the precoding matrix / channel is not predicted.

[0226] <Supplementary Information> [Notification of Information to UE] In the above-described embodiments, any information may be notified to the UE (from a network (NW) (e.g., a base station (BS))) (in other words, reception of any information from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling (RRC message / LPP message), MAC CE), a specific signal / channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0227] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader, which is not defined in existing standards.

[0228] When the notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0229] Furthermore, notification of any information to the UE in the above embodiments may be performed periodically, semi-persistently, or aperiodically.

[0230] [Notification of Information from UE] In the above-described embodiments, notification of any information from the UE (to the NW) (in other words, transmission / report of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0231] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID, which is not defined in existing standards, in the MAC subheader.

[0232] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0233] Furthermore, any information in the above-described embodiments may be notified from the UE periodically, semi-persistently, or aperiodically.

[0234] [Application of Each Embodiment] At least one of the above-described embodiments may be applied when a specific condition is met. The specific condition may be defined in a standard or may be notified to a UE / BS using higher layer signaling / physical layer signaling.

[0235] At least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.

[0236] The specific UE capabilities may indicate at least one of the following: - supporting specific processing / operations / control / information for at least one of the above embodiments; - supporting configuration of CSI reporting window / CSI-RS occasion; - supporting determination of number of CQIs; - supporting determination of CQI bit width; - supporting CQI calculation; - supporting application of CSI compression.

[0237] Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (e.g., one or a combination of a cell, a band, a band combination, a BWP, a component carrier, etc.), or may be a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or may be a capability for each subcarrier spacing (SubCarrier Spacing (SCS)), or may be a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0238] Furthermore, the specific UE capability may be a capability that is applied to all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (e.g., Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0239] Furthermore, at least one of the above-described embodiments may be applied when specific information related to the above-described embodiments (or performing the operations of the above-described embodiments) is configured / activated / triggered in the UE by higher layer signaling / physical layer signaling. For example, the specific information may be information indicating that the functions of the respective embodiments are enabled, any RRC parameters for a specific release (e.g., Rel. 18 / 19), etc.

[0240] If the UE does not support at least one of the specific UE capabilities or is not configured with the specific information, the UE may apply, for example, Rel. 15 / 16 behavior.

[0241] (Supplementary Note A) The following inventions are added to one embodiment (first to third embodiments) of the present disclosure. [Supplementary Note 1] A terminal having: a transmitter that transmits a channel state information (CSI) report; and a controller that, when at least one channel quality indicator (CQI) is included in the CSI report, determines at least one of the number of the CQIs, a bit width of the CQI, and an index of the CQI based on a certain condition. [Supplementary Note 2] The terminal according to Supplementary Note 1, in which the controller determines the bit width of the CQI based on a field of a certain CQI among a plurality of CQIs in a certain CSI reporting window. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, in which the controller determines the index of the CQI based on an offset level corresponding to an index of a certain CQI among a plurality of CQIs in a certain CSI reporting window. [Supplementary Note 4] The terminal according to any of Supplementary Note 1 to Supplementary Note 3, in which the controller determines the index of the CQI based on an offset level corresponding to a reference CQI index.

[0242] (Supplementary Note B) The following inventions are added with respect to one embodiment (fourth embodiment) of the present disclosure. [Supplementary Note 1] A terminal comprising: a transmitter unit that transmits a channel state information (CSI) report; and a controller that, when the CSI report includes at least one channel quality indicator (CQI), assumes that a specific precoding matrix or a specific vector of PDSCH symbols is to be applied to a physical downlink shared channel (PDSCH) transmission for CQI calculation. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein the controller derives the specific precoding matrix based on a reported precoding matrix indicator (PMI) or CSI calculated from measurements of a CSI-RS occasion. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the controller performs the CQI calculation based on the specific vector of PDSCH symbols at a time associated with the reported precoding matrix or a time based on a CSI-RS occasion. [Supplementary Note 4] The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein when the transmitting unit transmits information obtained by compressing CSI using an Artificial Intelligence (AI) / Machine Learning (ML) model, the control unit assumes that the specific precoding matrix or the specific PDSCH symbol vector is applied.

[0243] (Wireless Communication System) The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.

[0244] 17 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may be simply referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0245] The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0246] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0247] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0248] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The locations and numbers of the cells and user terminals 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.

[0249] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0250] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

[0251] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0252] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0253] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0254] The core network 30 may include network functions (Network Functions (NF)) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). A single network node may provide multiple functions. Communication with an external network (e.g., the Internet) may also be performed via the DN.

[0255] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0256] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the wireless communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0257] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0258] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0259] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), or the like may be used as an uplink channel.

[0260] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0261] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information for at least one of the PDSCH and the PUSCH.

[0262] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as a UL grant, a UL DCI, etc. Note that the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

[0263] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources for searching for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0264] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and the like in the present disclosure may be read interchangeably.

[0265] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0266] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0267] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0268] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as a reference signal.

[0269] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0270] (Base Station) Fig. 18 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0271] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0272] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0273] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0274] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0275] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, the RF unit 122, and a measurement unit 123.

[0276] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0277] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0278] The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0279] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0280] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0281] The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

[0282] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.

[0283] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0284] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0285] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes that provide NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0286] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0287] The transceiver 120 may transmit information related to a channel state information (CSI) report. The transceiver 120 may receive at least one channel quality indicator (CQI) in the CSI report. The transceiver 120 may receive information obtained by compressing the CSI using an artificial intelligence (AI) / machine learning (ML) model.

[0288] The control unit 110 may apply a specific precoding matrix or a specific vector of PDSCH symbols to a physical downlink shared channel (PDSCH) transmission for CQI calculation when the user terminal 20 includes at least one channel quality indicator (CQI) in the CSI report. The control unit 110 may apply the specific precoding matrix or the specific vector of PDSCH symbols when the user terminal 20 transmits information obtained by compressing CSI using an artificial intelligence (AI) / machine learning (ML) model.

[0289] (User Terminal) Fig. 19 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0290] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0291] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on common understanding in the technical field to which the present disclosure relates.

[0292] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transceiver unit 220.

[0293] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0294] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0295] The transmitting / receiving antenna 230 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0296] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0297] The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0298] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0299] The transmitter / receiver unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0300] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and if not, it may not be necessary to perform DFT processing as the transmission processing.

[0301] The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

[0302] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

[0303] The transceiver unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0304] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0305] The transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.

[0306] The transceiver 220 may transmit a channel state information (CSI) report or may transmit information obtained by compressing the CSI using an artificial intelligence (AI) / machine learning (ML) model.

[0307] When at least one channel quality indicator (CQI) is included in the CSI report, the control unit 210 may determine at least one of the number of the CQIs, the bit width of the CQIs, and the index of the CQI based on certain conditions. The control unit 210 may determine the bit width of the CQI based on a field of a certain CQI among multiple CQIs in a certain CSI reporting window. The control unit 210 may determine the index of the CQI based on an offset level corresponding to the index of a certain CQI among multiple CQIs in a certain CSI reporting window. The control unit 210 may determine the index of the CQI based on an offset level corresponding to a reference CQI index.

[0308] When the CSI report includes at least one channel quality indicator (CQI), the control unit 210 may assume that a specific precoding matrix or a specific vector of PDSCH symbols is applied to a physical downlink shared channel (PDSCH) transmission for CQI calculation. The control unit 210 may derive the specific precoding matrix based on a reported precoding matrix indicator (PMI) or CSI calculated from measurements of a CSI-RS occasion. The control unit 210 may perform the CQI calculation based on the specific vector of PDSCH symbols at a time associated with the reported precoding matrix or a time based on a CSI-RS occasion. When the transmitter 220 transmits information obtained by compressing CSI using an artificial intelligence (AI) / machine learning (ML) model, the control unit 210 may assume that the specific precoding matrix or the specific vector of PDSCH symbols is applied.

[0309] (Hardware Configuration) Note that the block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0310] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As described above, the implementation method of each is not particularly limited.

[0311] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 20 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0312] In the present disclosure, the terms apparatus, circuit, device, section, unit, etc. may be used interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0313] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0314] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0315] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001.

[0316] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be implemented in a similar manner.

[0317] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory, etc. The memory 1002 may store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0318] Storage 1003 is a computer-readable recording medium and may be composed of at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0319] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0320] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0321] Furthermore, each device, such as the processor 1001 and the memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0322] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using this hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0323] (Modifications) Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0324] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0325] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by a transceiver in the frequency domain, and specific windowing performed by a transceiver in the time domain.

[0326] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology.

[0327] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0328] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be interchangeable.

[0329] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0330] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0331] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a 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.

[0332] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0333] A TTI having a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0334] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0335] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0336] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI, each of which may be composed of one or more resource blocks.

[0337] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0338] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0339] A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0340] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0341] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0342] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0343] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0344] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0345] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0346] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes.

[0347] Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0348] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0349] Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0350] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0351] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0352] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0353] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), these wired and / or wireless technologies are included within the definition of transmission media.

[0354] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0355] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," etc. may be used interchangeably.

[0356] In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0357] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0358] In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information.

[0359] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0360] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0361] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

[0362] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0363] The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0364] 21 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, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM 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.

[0365] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0366] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0367] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation 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 the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the 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.

[0368] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0369] The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0370] The driving assistance system unit 64 includes various devices for providing functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0371] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 to and from the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, which are provided in the vehicle 40.

[0372] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Furthermore, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (or may function as at least one of the base station 10 and the user terminal 20).

[0373] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0374] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0375] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0376] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as an uplink channel and a downlink channel may be read as a sidelink channel.

[0377] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0378] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0379] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0380] Each aspect / embodiment described in the present disclosure may be a technology other than 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 decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802. The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0381] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0382] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0383] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, etc.

[0384] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0385] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "deciding" some action.

[0386] Furthermore, "judgment (decision)" may be read as "assuming," "expecting," "considering," or the like.

[0387] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0388] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0389] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0390] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0391] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0392] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0393] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with "i-th" (i is an arbitrary integer) attached (for example, "highest" may be interchangeable with "i-th highest").

[0394] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0395] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and explanatory and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. A receiver for receiving information indicating one or more slots associated with one or more channel quality indicators (CQIs) to be reported in a predicted channel state information (CSI) report; a control unit that determines the one or more CQI values ​​based on the information.

2. A method for predicting channel state information (CSI), comprising: receiving information indicating one or more slots associated with each of one or more channel quality indicators (CQIs) to report; and determining the one or more CQI values ​​based on the information.

3. A transmitter that transmits information indicating one or more slots associated with each of one or more channel quality indicators (CQIs) reported by a terminal in a predicted channel state information (CSI) report; a receiving unit that receives the one or more CQIs whose values ​​are determined by the terminal based on the information.

4. A system having a terminal and a base station, The terminal a receiver for receiving information indicative of one or more slots associated with one or more respective channel quality indicators (CQIs) to report in a predicted channel state information (CSI) report; a control unit that determines the one or more CQI values ​​based on the information, The base station A system having a transmitter for transmitting the information.