Terminal, wireless communication method, and base station

Abstract

A terminal according to one aspect of the present disclosure comprises: a reception unit that receives a configuration for reporting of M channel state information reference signal resource indicators (CRIs) based on the enhanced type-2 codebook; and a control unit that controls transmission of a CSI part 1 that includes one or more values of one or more reporting quantities corresponding to one or more of the M CRIs on the basis of the configuration and a CSI part 2 that includes a plurality of values of one or more reporting quantities corresponding to the remaining ones of the M CRIs.

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 that terminals (User Equipment (UE)) will control transmission and reception processing based on information regarding quasi-co-location (Quasi-Co-Location (QCL), Transmission Configuration Indication (TCI) state, beam).

[0006] However, the reporting of multiple channel state information-reference signal (CSI-RS) resource indicators (CRIs) using multiple CSI-RS resources has not been adequately considered, which may result in degradation of communication quality / throughput.

[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 on multiple CRIs.

[0008] A terminal according to one aspect of the present disclosure includes a receiving unit that receives a reporting configuration of M channel state information reference signal resource indicators (CRIs) based on an extended type-2 codebook, and a control unit that controls, based on the configuration, transmission of a CSI part 1 including one or more values ​​of one or more reporting quantities corresponding to one or more CRIs among the M CRIs, and a CSI part 2 including multiple values ​​of the one or more reporting quantities corresponding to the remaining multiple CRIs among the M CRIs.

[0009] According to one aspect of the present disclosure, reporting on multiple CRIs is performed appropriately.

[0010] FIG. 1 shows an example of a CSI-RS location within a slot. FIG. 2 shows the association between the supported number of CSI-RS ports and the base station antenna layout for a single panel of the existing specifications. FIG. 3 shows the association between the supported number of CSI-RS ports and the base station antenna layout for a multi-panel of the existing specifications. FIG. 4 shows an example of a combination of (N1, N2) and the total number P of CSI-RS ports across multiple aggregated resources in an extended CB based on a Type 1 CB. FIG. 5 shows an example of Table C-7 of the mapping order of CSI fields in a CSI report on the PUCCH. FIG. 6 shows an example of Table C-7A of the mapping order of CSI fields in a CSI report on the PUCCH. FIG. 7 shows an example of Table C-9 of the mapping order of CSI fields in CSI Part 1 of a CSI report on the PUCCH. FIG. 8 shows an example of Table C-10 illustrating the mapping order of CSI fields in CSI Part 2 wideband for CSI reporting on the PUCCH. FIG. 9 shows an example of Table C-11 illustrating the mapping order of CSI fields in CSI Part 2 subband for CSI reporting on the PUCCH. FIG. 10 shows an example of Table S-3 illustrating the mapping order of multiple CSI fields in CSI Part 1 for CSI reporting on the PUSCH. FIG. 11 shows an example of Table S-4 illustrating the mapping order of multiple CSI fields in CSI Part 2 wideband for CSI reporting on the PUSCH. FIG. 12 shows an example of Table S-5 illustrating the mapping order of multiple CSI fields in CSI Part 2 subband for CSI reporting on the PUSCH. FIG. 13 shows an example of Table C-7a illustrating the mapping order of CSI fields in wideband CSI. Figure 14 shows an example of Table C-9a showing the mapping order of CSI fields in CSI Part 1 of subband CSI. Figure 15 shows an example of Table C-7b showing the mapping order of CSI fields in wideband CSI. Figures 16A-16D show an example of the size of wideband CQI in multiple CSI. Figure 17 shows an example of a priority reporting level table for Part 2 CSI.FIG. 18 shows an example of Table E-1 of a CSI mapping order for multi-CRI. FIG. 19 shows an example of Table E-2 of a CSI mapping order for multi-CRI. FIG. 20 shows an example of Table P-1 of Option 1 of embodiment BL1. FIG. 21 shows an example of Table P-2 of Option 1 of embodiment BL1. FIG. 22 shows an example of Table P-3 of Option 1 of embodiment BL1. FIG. 23 shows an example of a table showing a mapping order of multiple CSI fields in CSI Part 2 of one CSI report of Extended Type 2 or Extended Type 2 PS CB. FIG. 24 shows an example of a mapping order of CSI Part 1 of Option 2 of embodiment BM1 based on Option 2-1 of embodiment AH2. FIG. 25 shows an example of a mapping order of CSI Part 2 of Option 2 of embodiment BM1 based on Option 2-1 of embodiment AH2. FIG. 26 shows an example of a mapping order of CSI Part 1 for option 2 of embodiment BM1 based on option 2-2 of embodiment AH2. FIG. 27 shows an example of a mapping order of CSI Part 2 for option 2 of embodiment BM1 based on option 2-2 of embodiment AH2. FIG. 28 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 29 is a diagram showing an example of a configuration of a base station according to an embodiment. FIG. 30 is a diagram showing an example of a configuration of a user terminal according to an embodiment. FIG. 31 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. FIG. 32 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-Interference Measurement, 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, SSB index), 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 about CSI reporting (report configuration information) and control CSI reporting based on the report configuration information. The report configuration information may be, for example, a "CSI-ReportConfig" information element (IE) of Radio Resource Control (RRC).

[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 the 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 to be used 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 the frequency granularity of the CSI report. The frequency granularity may include, for example, a wideband (WB) and a subband (SB). 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 (MU-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] In the present disclosure, CSI-RS, periodic CSI-RS (P-CSI-RS), semi-persistent CSI-RS (SP-CSI-RS), and aperiodic CSI-RS (AP-CSI-RS, A-CSI-RS) may be interchangeable. In the present disclosure, CSI-RS, periodic CSI reporting (P-CSI reporting), semi-persistent CSI reporting (SP-CSI reporting), and aperiodic CSI reporting (AP-CSI reporting, A-CSI reporting) may be interchangeable.

[0035] (Codebook Configuration) The UE is configured with parameters (codebook configuration (CodebookConfig)) related to the codebook (CB) by higher layer signaling (RRC signaling). The codebook configuration is included in the CSI report configuration (CSI-ReportConfig) of the higher layer (RRC) parameters.

[0036] In the codebook setting, at least one codebook is selected from a plurality of codebooks including 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).

[0037] The codebook parameters include a parameter related to the codebook subset restriction (CBSR) ("...Restriction" in CodebookConfig). 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.

[0038] (CSI Reporting Configuration) The CSI reporting configuration (CSI-ReportConfig) of Rel. 16 includes a channel measurement resource (CMR), an interference measurement resource (IMR), etc. in addition to a codebook configuration (CodebookConfig). The IMR may be at least one of a zero power-interference measurement resource (ZP-IMR) and a non-zero power-interference measurement resource (NZP-IMR). Of the parameters of CSI-ReportConfig, parameters excluding codebookConfig-r16 are also included in the CSI reporting configuration of Rel. 15.

[0039] In the present disclosure, CMR, NZP CSI-RS resources, and resourcesForChannelMeasurement may be interchangeable. In the present disclosure, ZP-IMR, CSI-IM resources, and csi-IM-ResourcesForInterference may be interchangeable. In the present disclosure, NZP-IMR, NZP CSI-RS resources for interference measurement, and nzp-CSI-RS-ResourcesForInterference may be interchangeable.

[0040] 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.

[0041] 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.

[0042] <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.

[0043] <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.

[0044] 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.

[0045] However, in the CSI reporting configuration for multi-TRP in Rel. 17 with CSI reporting settings, if the above-mentioned options 1 and 2 are applied, the following measurement configurations may be made: ◆ 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.

[0046] The multiple subbands for a given CSI report #n as indicated by the upper layer parameter csi-ReportingBand may be numbered consecutively in ascending order, with the lowest subband of csi-ReportingBand as subband 0.

[0047] (PMI / Type 1 Codebook) Type 1 (type I) codebook (Rel. 15) specifies a type 1 single panel codebook and a type 1 multi-panel codebook for base station panels. In the type 1 single panel, the antenna model (antenna setting) of the CSI antenna port array (logical setting) is specified for (N1, N2). The number of CSI-RS antenna ports P CSI-RS 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.

[0048] In the present disclosure, the first dimension, the N1 dimension, one of the horizontal domain and the vertical domain, and the horizontal domain may be interchanged. In the present disclosure, the second dimension, the dimension perpendicular to the first dimension, the N2 dimension, the other of the horizontal domain and the vertical domain, and the vertical domain may be interchanged. In the present disclosure, N1 and N2 may be interchanged, and the horizontal domain and the vertical domain may be interchanged.

[0049] In the present disclosure, an N1-by-N2 DFT vector, a spatial domain (SD) vector, a 2D-DFT vector, an SD DFT vector, an SD basis vector, an SD beam, an SD basis, a precoder, a beam, and a vector may be interpreted interchangeably.

[0050] In the present disclosure, the terms port, antenna port, CSI-RS port, port index, and port number may be interchangeable.

[0051] In the present disclosure, (N1, N2), the two-dimensional number of antenna ports, the antenna configuration, and the base station antenna layout may be interchangeable. g, the number of panels, the number of antenna groups, and the number of antenna port groups may be read as interchangeable. In the present disclosure, N1, the number of antennas in the first dimension, and the number of antenna ports in the first dimension may be read as interchangeable. In the present disclosure, N2, the number of antennas in the second dimension, and the number of antenna ports in the second dimension may be read as interchangeable. In the present disclosure, O1, the number of oversamplings in the first dimension may be read as interchangeable. In the present disclosure, O2, the number of oversamplings in the second dimension may be read as interchangeable. In the present disclosure, N1O1, the number of beams in the first dimension, and the number of vectors in the first dimension may be read as interchangeable. In the present disclosure, N2O2, the number of beams in the second dimension, and the number of vectors in the second dimension may be read as interchangeable.

[0052] In the present disclosure, two polarizations, a first polarization and a second polarization, and a horizontal polarization and a vertical polarization may be interchangeable. In the present disclosure, one polarization, one of a first polarization and a second polarization, and one of a horizontal polarization and a vertical polarization may be interchangeable. In the present disclosure, co-phasing, phase difference, phase compensation between polarizations, and φ may be interchangeable.

[0053] In the present disclosure, the terms Type 1 codebook, Type 1 single-panel codebook, and Type 1 multi-panel codebook may be interpreted interchangeably.

[0054] (Type 1 Single Panel (SP) Codebook) 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 ,i1,2 ,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=[i 1,1 i 1,2 i 1,3 ].

[0055] P CSI-RS The supported (N1,N2) and (O1,O2) settings (combinations of values) are defined in the specification. (N1,N2) indicate the number of two-dimensional (2D) antenna elements and are set by the upper layer parameters n1-n2 in moreThanTwo in nrOfAntennaPorts in typeI-SinglePanel. n1-n2 are bitmap parameters with N1O1N2O2 bits. (O1,O2) are the 2D oversampling factors.

[0056] The precoding matrix for v=1 is W l,m,n (v) The precoding matrix for v=2 is W l,l',m,m',n (v) It is expressed as P CSI-RS <16 and v=3,4, the precoding matrix is ​​W l,l',m,m',n (v) It is expressed as P CSI-RS The precoding matrix for ≥ 16 and v = 3, 4 is W l,m,p,n (v) The precoding matrix for v=5,6 is W l,l',l'',m,m',m'',n (v) The precoding matrix for v=7,8 is Wl,l',l'',l''',m,m',m'',m''',n (v) l,l',l'',l''' are expressed as 1,1 and k1. m, m', m'', and m''' are determined by i 1,2 and k2. n is determined by i2. p is determined by P CSI-RSOf the (≧16) ports, the first half of the ports are 0 and the second half of the ports are 1.

[0057] The precoding matrix W can be expressed as the product of two matrices, W1W2, where W1 represents the wideband and long-term channel properties and the codebook index i1 (e.g., i 1,1 and i 1,2 ) is expressed by i 1,1 and i 1,2 and denote the beam selection in two dimensions, respectively. W2 denotes frequency selectivity (subband) and short-term channel characteristics and is represented by codebook index i2. i2 may denote the phase adjustment between the two polarizations. W1 may be given by the following equation E1 using matrix B:

[0058] B shows L 2D DFT beams, each oversampled by (O1, O2).

[0059] If the rank is {1, 5, 6, 7, 8}, the codebook index for each PMI is i 1,1 , i 1,2 , i2. If the rank is {2, 3, 4}, the codebook index for each PMI is i 1,1 , i 1,2 , i 1,3 , i2. i 1,3 is mapped to k1 and k2 according to a table in the specification. For rank=2, 3, 4, the beams selected for different layers can be different when generating PMI.

[0060] The codebook for 1-layer CSI reporting and codebookMode=1 is index i corresponding to the horizontal component of the beam. 1,1 = l=0,1,...,N1O1-1 and the index i corresponding to the vertical component of the beam 1,2= m = 0, 1, ..., N2O2-1 and indices i2 = n = 0, 1, 2, 3 corresponding to the subbands. Antenna ports 3000 to 2999+P CSI-RS Precoding matrix W for one-layer CSI reporting with l,m,n (1) is given by the following equation E2:

[0061] φ for the precoding matrix n , θ p , u m , v l,m , v ~ l,m is given by the following equation E3:

[0062] where [i 1,1 ,i 1,2 ,i2]=[l,m,n]. l,m is an N1-by-N2 DFT vector (SD basis vector, SD beam), expressed as exp(j2πln1 / O1N1) × exp(j2πmn2 / O2N2), n1 = 0, 1, ..., N1-1, n2 = 0, 1, ..., N2-1, and specified by v and l. l,m indicates one beam. The phase adjustment φ between the two polarizations n θ = exp(jπn / 2), which indicates the difference in phase of the second polarization relative to the phase of the first polarization. p indicates the phase of the second half port relative to the phase of the first half port.

[0063] (Type 1 Multi-Panel (MP) Codebook) For Rel. 15 Type 1 multi-panel CSI, the UE sets the codebook type upper layer parameter (subType in type1 in codebookType in CodebookConfig) to Type 1 multi-panel ('typeI-MultiPanel'). For Rel. 15 Type 1 multi-panel CSI, compared to Type 1 single-panel codebook, the number of panels N in addition to N1 and N2 is increased. gCompared with the Type 1 single-panel codebook, the (wideband) inter-panel co-phasing (phase compensation between panels) is set as i 1,4 The same SD beam (DFT vector v l,m , SD basis indices l,m) are selected and only the inter-panel phase differences are added and reported.

[0064] P CSI-RS Supported (N g The 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 =l={0,1,...,N1O1-1} is the horizontal component of the oversampled SD basis. 1,2 =m={0,1,...,N2O2-1} is the vertical component of the oversampled SD basis. q=1,...,N g i to -1 1,4,q =p={0,1,2,3} is the number of panels. i2=n={0,1,2,3} is the number of beams per panel.

[0065] The antenna configuration parameters for the Type 1 multi-panel codebook are ng-n1-n2 (N g , N1, N2). In the existing specifications, ranks up to 4 are supported, and ranks 5 and above are not supported.

[0066] Each PMI value corresponds to a codebook index i1, i2. v is the RI value (number of layers). For v=1, i1=[i 1,1 i 1,2 i 1,4 ]. For v∈{2,3,4}, i1=[i 1,1 i 1,2 i 1,3 i 1,4 ].

[0067] When the codebook mode is set to 1, Ng = 2, i 1,4 =i 1,4,1 N g = 4, i 1,4 =[i 1,4,1 i 1,4,2 i 1,4,3 ]. When the codebook mode is set to 2, i 1,4 =[i 1,4,1 i 1,4,2 ]. i 1,4 is the number of panels N g and codebook mode. N g Codebook mode 2 is supported only for [i 1,4,1 i 1,4,2 ] correspond to two polarizations, respectively. Each of the two values ​​represents the wideband phase difference of the second panel (Panel 1) relative to the first panel (Panel 0) in the corresponding polarization. N g = 2 and i in codebook mode 1 1,4 Only one value is reported, which represents the wideband retardation of the second panel (Panel 1) relative to the first panel (Panel 0).

[0068] When the codebook mode is set to 2, i2 = [i 2,0 i 2,1 i 2,2 ]. The number and value of i2 are related to the codebook mode and may be different from the Type 1 single panel codebook. If subband reporting is configured, i2 is the index for the subband. If wideband reporting is configured, i2 is the index for the wideband. In codebook mode 1, the number and value of i2 are the same as in the Type 1 single panel codebook, and i2 has one value for each subband. In codebook mode 2 (N g =2), the phase difference between the subbands has three values, representing the phase difference between the polarizations and between the panels.

[0069] Codebook mode 2 has a larger feedback overhead because it reports more phase differences for more accurate CSI. g Only supported for =2.

[0070] The Type-1 multi-panel codebook is based on the Type-1 single-panel codebook. In the Type-1 multi-panel codebook, the codebook for the first panel (Panel 0) follows the Type-1 single-panel codebook. The codebooks for the other panels apply the same precoder, with additional phase differences between the panels.

[0071] φ for the precoding matrix n , a p , b p , u m , v l,m is given by the following equation E4:

[0072] Antenna ports 3000 to 2999+P CSI-RS The precoding matrix for v-layer CSI reporting using (v) The number of panels in the i-th layer is N. g , the precoding matrix for codebook mode X is W l,m,p,n i,N_g,X It is expressed by [i 1,1 ,i 1,2 ,i 1,4 ,i2]=[l,m,p,n].

[0073] Codebook modes 1 and N g = {2, 4}, the precoding matrix W for 1-layer CSI reporting l,m,p,n (1) is W l,m,p,n 1,N_g,1 The codebook modes 1 and N are represented by g = {2,4}, the precoding matrix W for 2-layer CSI reporting l,l',m,m',p,n (2) is (1 / sqrt(2))[W l,m,p,n (1,N_g,1) W l',m',p,n(2,N_g,1) ] where N g =W for {2,4} l,m,p,n 1,N_g,1 and W l,m,p,n 2,N_g,1 (N g W for =2 l,m,p,n 1,2,1 and W l,m,p,n 2,2,1 And, N g W for =4 l,m,p,n 1,4,1 and W l,m,p,n 2,4,1 and ) are given by the following equation E5:

[0074] where φ n =e jπn / 2 N g =2, p=p1, and N g For φ = 4, p = [p1, p2, p3]. p_1 , φ p_2 , φ p_3 represents the inter-panel phase difference (inter-panel phase compensation). In each precoding matrix, the first and second rows correspond to the first panel (panel 0), the third and fourth rows correspond to the second panel (panel 1), the fifth and sixth rows correspond to the third panel (panel 2), and the seventh and eighth rows correspond to the fourth panel (panel 3). Since the same SD beam is selected for all panels, each row has the same v l,m φ p_1 represents the phase difference of the second panel relative to the first panel. p_2 represents the phase difference of the third panel relative to the first panel. p_3 represents the phase difference of the fourth panel relative to the first panel.

[0075] Codebook modes 2 and N g = 2, the precoding matrix W for 1-layer CSI reporting l,m,p,n (1) is W l,m,p,n 1,2,1 The codebook modes 2 and N g = 2, the precoding matrix W for two-layer CSI reporting l,l',m,m',p,n(2) is (1 / sqrt(2))[W l,m,p,n 1,2,2 W l',m',p,n 2,2,2 ] where W l,m,p,n 1,2,2 and W l,m,p,n 2,2,2 is given by the following equation E6:

[0076] In each precoding matrix, the first and second rows correspond to the first panel (panel 0), and the third and fourth rows correspond to the second panel (panel 1). Since the same SD beam is selected for all panels, each row has the same v l,m p = [p1 p1] and n = [n0, n1, n2]. p_1 represents the phase difference of the second panel (panel 1) relative to the first panel (panel 0) in the first polarization. p_2 represents the phase difference of the second panel (panel 1) relative to the first panel (panel 0) in the second polarization. n_0 represents the phase difference of the second polarization of the first panel relative to the first polarization of the first panel for each subband. n_1 represents the phase difference of the first polarization of the second panel relative to the first polarization of the first panel for each subband. n_2 represents the phase difference of the second polarization of the second panel relative to the first polarization of the first panel for each subband.

[0077] (PMI / Type 2 Codebook) In the present disclosure, the terms Type 2 (type II) codebook, extended Type 2 codebook, Type 2 port selection (PS) codebook, extended Type 2 PS codebook, additional extended Type 2 port PS codebook, codebook for CJT, and codebook for Doppler may be interpreted interchangeably.

[0078] (Type II Codebook) For a type II codebook (Rel. 15, type II CSI), the UE is configured with the upper layer parameter codebookType set to 'type II'.

[0079] In this disclosure, a matrix Z with X rows and Y columns may be expressed as Z(X×Y).

[0080] In Rel. 15 Type 2 CSI, for a given layer l, the subband-wise (SB-wise) precoding matrix is ​​based on the following equation F1: l (N t ×N3) = W1W 2,l (F1)

[0081] N t is the number of antennas / antenna ports. N3 is the total number of precoding (beamforming) matrices (precoders) indicated by the PMI (number of subbands).

[0082] W1(N t ×2L) are 2L DFT vectors (oversampled DFT vectors) and indicate the selected spatial domain basis. L∈{2,4} is the number of beams per layer. The actual number of beams considering two polarizations at one location is 2L. For example, the DFT vectors of L=2 SD beams are respectively b i ,b j It may be expressed as:

[0083] W 2,l (2L×N3) is a matrix (LC coefficient matrix) consisting of linear combination coefficients (subband complex LC coefficients, coupling coefficients) for layer l. 2,l represents the beam selection and the co-phasing between the two polarizations. For example, for L=2 SD beams b i ,b j The LC coefficients corresponding to i ,c j For example, the channel vector h is a linear combination of L=2 SD beams, c i b i ,+c j b j The feedback overhead is mainly due to the LC coefficient matrix W 2,lAlso, Type 2 CSI in Rel. 15 only supports ranks 1 and 2.

[0084] In Type-2 CSI, the channel (channel matrix) for a user is represented by a linear combination of two polarizations and L SD beams. Type-2 CSI in Rel. 15 supports ranks 1 and 2.

[0085] The value of L is set using the upper layer parameter numberOfBeams.

[0086] The L vectors combined by the codebook are 1,1 and i 1,2 Identified by i 1,1 =[q1 q2] q1∈{0,1,...,O1-1} q2∈{0,1,...,O2-1} i 1,2 ∈{0,1,..., N_1*N_2 C L -1} n1=[n1 (0) ,...,n1 (L-1) ] n2=[n2 (0) ,...,n2 (L-1) ] n1 (i) ∈{0,1,...,N1-1} n2 (i) ∈{0,1,...,N2-1} C(x,y) is x C y , 0 for x<y.

[0087] ((Enhanced Type 2 Codebook (Rel. 16))) For Rel. 16 Type 2 CSI (enhanced Type 2 codebook), the UE is configured with the upper layer parameter codebookType set to 'typeII-r16'.

[0088] Type 2 CSI in Rel. 16 uses frequency domain (FD) compression to compress the LC coefficient matrix W 2,l Rel. 16 Type 2 CSI supports ranks 3 and 4 in addition to ranks 1 and 2.

[0089] In Rel. 16 Type 2 CSI, the precoding matrix W for a given layer l is l is expressed by the following formula F2: l = W1W ~ l W f,l H (F2)

[0090] W in Type 2 CSI of Rel. 15 2,l is W ~ l W f,l H It is approximated by the matrix W ~ may be expressed by adding ~ to the W. ~ l is W ~ 2,l It can also be expressed as W f,l H is W f,l is the adjoint matrix of W f,l is obtained by the conjugate transpose of

[0091] 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.

[0092] W1(N t ×2L) denotes the 2L DFT vectors. To represent this matrix, the indices of the SD basis and the two-dimensional over-sampling factor are reported.

[0093] W ~ l (2L×M v ) is the LC coefficient matrix. To represent this matrix, up to K0 non-zero coefficients (NZCs, LC coefficients with non-zero amplitude) are reported. The report consists of two parts: a bitmap indicating the NZC positions and the quantized NZCs.

[0094] W f,l (N3×M v ) for layer l, M v DFT vectors (frequency domain (FD) DFT vector, FD basis vector, FD beam) indicate the selected frequency domain basis. Each DFT vector uses N3 FD bases (subbands). N3 is the total number (number of subbands) of precoding (beamforming) matrices (precoders) indicated by the PMI as a function of the number of subbands configured in the csi-ReportingBand. The csi-ReportingBand indicates contiguous or discontiguous subbands within a BWP when CSI for that BWP is reported. M v If N3 > 19, there are M FD DFT vectors from the intermediate subset (InS) of size N3' (<N3). v FD DFT vectors (FD basis) 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 -Represents the number of combinations in which one can be selected (combinatorial coefficient), and is also called the binomial coefficient.

[0095] The frequency domain response / distribution (frequency response) represented by the linear combination of the FD DFT vector and the LC coefficients may be called an FD beam, which may correspond to a delay profile (time response).

[0096] The PMI subband size is given by CQI subband size / R, where R∈{1, 2}. In other words, R is the ratio of the CQI subband size to the PMI subband size. The number of FD DFT vectors for a given rank v is M. v is ceil(p v ×N3 / R) The number of FD DFT vectors M v is the same for all layers l∈{1,2,3,4}. v is set by higher layers.

[0097] The multiple precoding matrix indicated by the PMI is L+M v is determined from vectors.

[0098] The L SD beams (SD DFT vectors) vm_1^(i), m_2^(i) for beam index i=0,1,...,L-1 are identified by q1, q2, n1, n2, and i 1,1 , i 1,2 is shown by

[0099] M v The FD DFT vectors are initial ∈{-2M v +1,-2M v +2,...,0}, n 3,l =[n 3,l (0) ,...,n 3,l (M_v-1) ], n 3,l (f) ∈{0,1,...,N3-1}.

[0100] In the FD DFT vector, the elements (FD basis) for the FD basis (subband) index t=0,1,...,N3-1 and layer l=1,...,v are y t,l (f) =exp(j2πtn 3,l (f) / N3). M of FD DFT vector v indices f=0,1,...,M v M to -1 v The FD DFT vectors are0,l (f) ,y 1,l (f) ,...,y N_3-1,l (f) ] T is.

[0101] W 2,l 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 is sparse in the time domain). As a result, the channel frequency response per SD beam is highly correlated (approaching flat in the frequency domain). In this case, the channel frequency response can be approximated by a linear combination of a small number of FD DFT vectors. For example, M v = 2, the FD DFT vector f2,f q and LC coefficient d1 0 ,d2 0 and the frequency response associated with the SD beam b0 is given by d1 0 f2+,d2 0 f q is approximated by

[0102] Dominant M v M FD DFT vectors are selected. v <<By setting it to N3, W ~ l The overhead of W 2,l The overhead is much smaller than that of M v All or some of the FD DFT vectors are used to approximate the frequency response of each SD beam. A bitmap is used to report only the selected FD DFT vectors for each SD beam. If no bitmap is reported, all FD DFT vectors are selected for each SD beam. In this case, the NZCs of all FD DFT vectors are reported for each SD beam. The number of NZCs in a layer, K l NZ ≦K0=ceil(β×2LM v ) and the NZC number K across all layers NZ ≦2K0=ceil(β×2LM v) where β is set by higher layers.

[0103] In the extended type 2 codebook, L, β, p v The combination of values ​​(parameter combination) is determined by the upper layer parameter paramCombination-r16 (parameter combination setting). L is the number of SD beams. v is the number of FD basis vectors for rank v, M v =ceil(p v × N3 / R). β is a parameter for calculating the maximum number of NZCs.

[0104] In the present disclosure, the terms codebook parameter combination, codebook parameter combination, parameter combination, and parameter combination setting may be read interchangeably.

[0105] 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 (the UCI size depends on the number of NZCs, which is unknown to the base station). The UE reports the number of NZCs in CSI Part 1, which determines the size of CSI Part 2. The base station knows the size of CSI Part 2 after receiving CSI Part 1.

[0106] In Rel. 16 Enhanced Type 2 CSI feedback, CSI Part 1 includes the RI (if reported), the CQI, and an indicator of the total number of non-zero amplitude coefficients across layers for Enhanced Type 2 CSI. The fields in Part 1, RI (if reported), CQI, and the indicator of the total number of non-zero amplitude coefficients across layers, are coded separately. CSI Part 2 includes the 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 SD basis corresponding to each SD beam, and the index M of the initial FD DFT vector (start offset) for the selected DFT window. initial and at least one of the selected FD basis for each layer, NZC (amplitude and phase) for each layer, strongest coefficient indicator (SCI) for each layer, and amplitude of the strongest coefficient for each layer / polarization.

[0107] The multiple PMI indices (PMI values, codebook indices) associated with different CSI part 2 information are expressed by the following equation F21 for the l-th layer of rank v: i1 = [i 1,1 i 1,2 i 1,5 i 1,6,1 i 1,7,1 i 1,8,1 ] (v=1) i1=[i 1,1 i 1,2 i 1,5 i 1,6,1 i 1,7,1 i 1,8,1 i 1,6,2 i 1,7,2 i 1,8,2 ] (v=2) i1=[i 1,1 i 1,2 i 1,5 i 1,6,1 i 1,7,1 i 1,8,1 i 1,6,2 i 1,7,2 i 1,8,2 i 1,6,3 i1,7,3 i 1,8,3 ] (v=3) i1=[i 1,1 i 1,2 i 1,5 i 1,6,1 i 1,7,1 i 1,8,1 i 1,6,2 i 1,7,2 i 1,8,2 i 1,6,3 i 1,7,3 i 1,8,3 i 1,6,4 i 1,7,4 i 1,8,4 ] (v=4) (F21)

[0108] Each index is defined as follows: ◆i 1,1 : Rotation factors [q1 q2] in two-dimensional oversampling. q1∈{0,1,...,O1-1}, q2∈{0,1,...,O2-1}. A beam index is selected within each (SD) beam group, i 1,1 Reported / displayed by i 1,2 : Multiple indices of the SD basis corresponding to each SD beam. i 1,2 ∈{0,1,...,C(N1N2,L)-1}. L beam groups are selected from N1N2 (SD) beam groups, and i 1,2 Reported / displayed by i 1,5 : Codebook indicator. The index of the FD basis for the selected DFT window. i 1,5 ∈{0,1,...,2M v -1}. ◆i 1,6,l : Codebook indicator. The FD basis selected for the l-th layer. If N3≦19, then i 1,6,l ∈{0,1,...,C(N3-1,M v -1)-1}. If N3>19, i 1,6,l ∈{0,1,...,C(2M v -1,M v -1)-1}. ◆i 1,7,l : Bitmap indicator for the lth layer. The non-zero bits in the bitmap are i2,4,l and i 2,5,l Identifies which coefficients in are reported. 1,7,l =[k l,0 (3) ...k l,M_v-1 (3) ], k l,f (3) =[k l,0,f (3) ...k l,M_v-1,f (3) ], k l,i,f (3) ∈{0,1}. ◆i 1,8,l : The strongest coefficient indicator for the lth layer (the largest element k in the amplitude coefficient indicator) l,i,f (2) ).i 1,8,l The strongest coefficients in layer l, identified by ∈{0,1,...,2L-1}, are i for v=1. 1,8,l =Σ i=0 i_1^* k l,i,0 (3) -1, and for 1 < v ≤ 4, i 1,8,l =i l * It is given as follows. ◆i 2,3,l : Amplitude coefficient indicator (for both polarizations) of the (wideband) coefficients of the lth layer. 2,3,l =[k l,0 (1) k l,1 (1) ]. ◆i 2,4,l : The amplitude coefficient indicator of the reported (subband) coefficient of the lth layer. 2,4,l =[k l,0 (2) ...k l,M_v-1 (2) ]. ◆i 2,5,l : Phase coefficient indicator of the reported (subband) coefficient of the lth layer. 2,5,l =[c l,0,f ...c l,M_v-1,f ].

[0109] f l * ∈{0,1,...,M v -1}, i 2,4,lLet i be the index of l * ∈{0,1,...,2L-1} is k l,f_l^* (2) Let f be the index of l * and i l * is the strongest coefficient for layer l=1,...,v, i.e., for layer l 2,4,l Elements kl,i_l^*,f_l^* (2) Identify the codebook index n 3,l is n 3,l (f_l^*) Regarding 3,l (f) =(n 3,l (f) -n 3,l (f_l^*) ) mod N3 and remapped, and after remapping, n 3,l (f_l^*) = 0. The index f is f l * Regarding f=(ff l * ) mod M v and after remapping, l * = 0 (l = 1,...,v). 2,4,l , i 2,5,l , and i 1,7,l indicates the amplitude coefficient, phase coefficient, and bitmap after remapping, respectively.

[0110] W ~ l Each reported LC coefficient (complex coefficient) in is a separately quantized amplitude and phase. ◆ Amplitude quantization Polarization specific reference amplitudes are calculated from the table (amplitude coefficient indicator i 2,3,l Mapping of elements in: Amplitude coefficient indicator element k l,p (1) to amplitude coefficient p l,p (1) This table uses 16-level quantization with a mapping to p l (1) =[p l,0 (1) pl,1 (1) ] is [k l,0 (1) k l,1 (1) ], k l,p (1) ∈{0,...,15}. All other coefficients are quantized according to the table defined in the specification (amplitude coefficient indicator i 2,4,l Mapping of elements in: Amplitude coefficient indicator element k l,i,f (2) to amplitude coefficient p l,i,f (2) This table uses 8-level quantization with a mapping to p l (2) =[p l,0 (2) ...p l,M_v-1 (2) ], p l,f (2) =[p l,0,f (2) ...p l,2L-1.f (2) ] is k l,f (2) =[k l,0,f (2) ...k l,2L-1.f (2) ], k l,i,f (2) ∈{0,...,7}. ◆Phase quantization amplitude coefficient indicator i 2,5,l Elements in (amplitude coefficient indicator elements) [c l,0 ...c l,M_v-1 ] is reported by the UE (using 4 bits). All phase coefficients are quantized using 16-PSK. The quantity φ for the phase difference l,i,f = exp(j2πc l,i,f / 16) is the phase coefficient c l,f =[c l,0,f ...c l,2L-1.f ], c l,i,fi ∈{0,...,15}.

[0111] The amplitude coefficient indicator element kl,floor(i_l^* / L) corresponds to the strongest coefficient of layer l. (1)= 15 (maximum value), and the amplitude coefficient indicator element k l,i_l^*,0 (2) = 7 (maximum value), and the phase coefficient indicator element c l,i_l^*,0 (2) = 0 (minimum value). For l=1,...,v, kl,floor(i_l^* / L) (1) , k l,i_l^*,0 (2) , c l,i_l^*,0 (2) =0 is not reported.

[0112] i 1,5 and i 1,6,l is the PMI index for FD-based reporting. Only if N3>19, i 1,5 is reported.

[0113] 3000 to 2999+P CSI-RS The precoding matrix W is represented by the codebook for v (=1 to 4) layer CSI reporting using (v) is the precoding matrix W for layer l (= 1 to v) l Based on the precoding matrix W l is expressed by the following formula F3.

[0114] where beam index i=0,1,...,L-1, m1 (i) =O1n1 (i) +q1, m2 (i) =O2n2 (i) +q2, n1 (i) ∈{0,1,...,N1-1}, n2 (i) n1 ∈{0,1,...,N2-1}. (i) , n2 (i) is the SD basis for representing the SD beam i. vm_1^(i),m_2^(i) are DFT vectors representing the SD beams. p l,0 (1) denotes the wideband amplitude coefficient. l,i,f (2) denotes the subband amplitude coefficient. l,i,fdenotes a phase coefficient. Thus, the codebook for each layer includes the strongest coefficient for each polarization, the amplitude coefficient for each polarization, the FD beam, and the SD beam, and the phase coefficient for each polarization, the FD beam, and the SD beam.

[0115] For CSI Part 2 grouping, for a given CSI report, the PMI information is organized into three groups (groups 0 to 2), which is important when CSI omission is performed.

[0116] For a given CSI report n, in the extended type 2 report and the type 2 for predicted PMI, where N4=1, the index i, numbered by l, i, and f, is 2,4,l , i 2,5,l , and i 1,7,l The reported elements of are l=1,2,...v, i=0,1,...,2L-1, and f=0,1,...,M v -1 π(f) = min(2 n 3,l (f) ,2・(N3-n 3,l (f) )-1)), the priority value Pri(l,i,f) = 2 L v π(f) + v f + l. The element with the highest priority has the lowest associated value Pri(l,i,f). The omissions in Part 2 CSI are the priority reporting levels (Priority Reporting Table, Priority 0, 1, ..., 2N rep , N rep is the number of CSI reports configured to be carried on the PUSCH). Groups 0 to 2 are based on the following: ◆ Group 0 is based on i 1,1 and i 1,2 and i 1,8,l (l=1,...,v) and the second (TB) wideband CQI (if reported). 1,5 and i 1,6,l and i 1,7,l v2LM from the highest priority (top priority) v Q-floor(K NZ / 2) elements and i 2,3,l and i 2,4,lFrom the highest priority (higher priority) max(0,ceil(K NZ / 2)-v) elements and i 2,5,l From the highest priority (higher priority) max(0,ceil(K NZ / 2)-v) elements and (if reported) i 1,10,l and the second (TB) subband CQI of the even index subbands (if reported). 1,7,l From the lowest priority (lower priority) floor(K NZ / 2) elements and i 2,4,l min(K NZ -v,floor(K NZ / 2)) elements and i 2,5,l min(K NZ -v,floor(K NZ / 2) elements and the second (TB) subband CQI of odd-indexed subbands (if reported).

[0117] In the priority reporting table, priorities 0, 1, ..., 2N rep Priority 0 is based on CSI reports 1 to N rep ◆Priority 1 is Group 1 CSI in CSI report 1. ◆Priority 2 is Group 2 CSI in CSI report 1. ◆Priority 3 is Group 1 CSI in CSI report 2. ◆Priority 4 is Group 2 CSI in CSI report 2. ... ◆Priority 2N rep -1 is CSI Report N rep It is a Group 1 CSI in the rep CSI Report N rep This is Group 2 CSI in.

[0118] In Type-1 CSI, an SD beam represented by an SD DFT vector is sent to the UE. In Type-2 CSI, L SD beams are linearly combined and sent to the UE. Each SD beam can be associated with multiple FD DFT vectors (FD beam, FD basis, frequency response). For the corresponding SD beam, the channel frequency response can be obtained by linearly combining these FD DFT vectors. The channel frequency response corresponds to the power delay profile.

[0119] (Type 2 Port Selection Codebook) For Rel. 15 Type 2 port selection (PS) CSI (Type 2 PS Codebook), the UE is configured with the higher layer parameter codebookType set to 'typeII-PortSelection'.

[0120] In Rel. 15's Type 2 port selection CSI, the UE does not need to derive an SD beam by considering an SD DFT vector as in Type 2 CSI. The base station transmits CSI-RS using K CSI-RS ports beamformed by considering a set of SD beams. The UE selects / identifies the best L (≦K) CSI-RS ports for each polarization and reports their indices in W1. Rel. 15's Type 2 PS CSI supports ranks 1 and 2.

[0121] The value of d is set using the upper layer parameter portSelectionSamplingSize. d ∈ {1, 2, 3, 4} and d ≦ min (P CSI-RS / 2,L).

[0122] For each polarization, L antenna ports are 1,1 Selected by i 1,1 ∈{0,1,...,ceil(P CSI-RS / (2d))-1}.

[0123] ((Enhanced Type 2 Port Selection Codebook (Rel. 16))) For Rel. 16 Type 2 PS CSI (enhanced Type 2 PS codebook), the UE is configured with the upper layer parameter codebookType set to 'typeII-PortSelection-r16'.

[0124] The operation of Rel. 16 Type 2 PS CSI is similar to Rel. 16 Type 2 CSI except for SD beam selection. Rel. 15 Type 2 PS CSI supports ranks 1 to 4.

[0125] For layer l∈{1,2,3,4}, the precoding matrix W for generating a subband-wise (subband (SB)-wise) precoder is l is expressed by the following formula F4: l (N t ×N3) = QW1W ~ l W f,l H (F4)

[0126] Here, Q(N t ×K) denotes the K SD beams used for CSI-RS beamforming. W1(K×2L) is a block diagonal matrix. W ~ l (2L×M) is the LC coefficient matrix. W f,l (N3×M) is a matrix consisting of M vectors (FD basis vectors), and each vector contains N3 FD bases. 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}.

[0127] In the Type 2PS CSI of Rel. 15 / 16, each CSI-RS port #i is connected to an SD beam b i is associated with.

[0128] The extended type 2 PS CSI increases the number of FD basis vectors from N3 to M in the same way as the type 2 CSI of Rel. 16. v By reducing it to (M v <<N3>>, which reduces overhead compared to Rel. 15 Type 2 PS CSI.

[0129] In the extended type 2 PS codebook, L, β, p v The combination of values ​​(parameter combination) is determined by the upper layer parameter paramCombination-r16 (parameter combination setting).

[0130] For the Rel. 17 Type 2 PS CSI / codebook (further enhanced Type 2 PS codebook), the UE configures the upper layer parameter codebookType set to 'typeII-PortSelection-r17'.

[0131] In Type 2 PS CSI of Rel. 17, each CSI-RS port #i transmits an SD-FD beam pair (SD beam b i and FD beam f i,j In this example, ports 3 and 4 are associated with the same SD beam and different FD beams.

[0132] 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.

[0133] The main scenario for the Rel. 17 Type-2 PS codebook is FDD. Channel reciprocity based on SRS measurements is not perfect (the angles of the UL beam and DL beam may be different, the UL frequency and DL frequency are different in FDD, and the effective antenna spacing at the UL frequency and DL frequency is different). However, the base station can obtain / select some partial information (dominant angle and delay (SD beam and FD beam)). By using SRS measurements at the base station in addition to CSI reports, the base station can obtain CSI for determining the DL MIMO precoder. In this case, some CSI reports may be omitted to reduce CSI overhead.

[0134] In the supplemental enhanced type 2 PS codebook, the values ​​of α, M, and β (codebook parameter combination, parameter combination) are determined by the upper layer parameter paramCombination-r17 (codebook parameter setting). In the parameter combination α, M, and β for the supplemental enhanced type 2 PS codebook in Rel. 17, α is the number of selected CSI-RS ports in the PS codebook, K1 = αP CSI-RS is a parameter for the calculation of M. M is the number of FD basis vectors. β is a parameter for the calculation of the maximum number of NZCs. The precoding matrix indicated by PMI is determined from L+M vectors, where L=K1 / 2 and K1=αP CSI-RS is.

[0135] L vectors v m^(i) (i=0,1,...,L-1) based on P CSI-RS K1 ports are selected from the vector v m^(i) is m=[m (0) ... [m (L-1) ], m (i) ∈{0,1,...,P CSI-RS / 2-1}. (i) is the index i 1,2 ∈{0,1,...,C(P CSI-RS / 2,L)-1}.

[0136] In the additional enhanced Type 2PS CSI of Rel. 17, each CSI-RS port is beamformed using an SD beam and an FD beam, and each port is associated with an SD-FD beam pair.

[0137] Precoding matrix W for a given layer l l is expressed by the following formula F5: l (K×N3) = W1W ~ l W f,l H (F5)

[0138] 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 beam pair. The UE selects L ports out of the K and reports the index of the selected port to the base station as part of the PMI. Note that in Rel. 16, each port is associated with an SD beam.

[0139] W ~ l (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 indicating the NZC positions and the quantized NZCs.

[0140] In the additional extension type 2PS CSI of Rel. 17, K l NZ =Σ i=0 k1-1 Σ f=0 M-1 k l,i,f (3) ≦K0 is the number of non-zero coefficients in layers l=1,...,v, and K NZ =Σ l=1 v K l NZ≦2K0 is the total number of non-zero coefficients. If v≦2 and K NZ =K1Mv, i for layers l=1,...,v 1,7,l (Bitmap indicator for the lth layer) is not reported. That is, if the total number of reported NZCs is equal to the maximum number of K1Mv and v≦2, reporting of the bitmap indicating the position of NZCs is omitted. Note that in Rel. 16, the NZC position bitmap is always reported.

[0141] W f,l (N3×M v ) is M for each layer. v (M v = 1 or 2) FD basis vectors. Each vector contains N3 FD bases (FD-DFT bases). The base station f,l You can also erase. M v If W = 1, f,l is off and no additional FD basis vectors are reported. v If W = 2, f,l is on and M v additional FD basis vectors are reported. v = 2, the window size N ∈ {2, 4} of the FD basis is set by the upper layer parameter (valueOfN). f,l is always reported.

[0142] (JT) Joint transmission (JT) may refer to simultaneous data transmission from multiple points (eg, TRPs) to a single UE.

[0143] Rel. 17 supports non-coherent joint transmission (NCJT) from two TRPs. The PDSCHs from the two TRPs may be independently precoded and independently decoded. The frequency resources may be non-overlapping, partially overlapping, or fully overlapping. When overlap occurs, the PDSCH from one TRP will interfere with the PDSCH from the other TRP.

[0144] Rel. 18 is considering supporting coherent joint transmission (CJT, mTRP CJT) using up to four TRPs. Data from the four TRPs may be coherently precoded and transmitted to the UE on the same time-frequency resource. For example, the same precoding matrix may be used to consider channels from the four TRPs. "Coherent" may mean that there is a fixed relationship between the phases of multiple received signals. Using four-TRP joint precoding, signal quality may be improved and there may be no interference between the four TRPs. Data may only be subject to interference outside the four TRPs.

[0145] (NCJT CSI / Type 1 Codebook) In Rel. 17, the applicable scenario for NCJT CSI reporting is a single DCI-based MTRP NCJT with a Type 1 single-panel codebook. For NCJT CSI measurement, two channel measurement resource (CMR) groups, each with a CMR from one TRP, can be configured within a single CSI-ReportConfig. One CSI reporting mode can be configured from two modes:

[0146] Through RRC signaling, the CSI-ReportConfig for Rel. 17 non-coherent joint transmission (NCJT) CSI configures the CMR and the CSI reporting mode (csi-ReportMode).

[0147] K s Two CMR groups with K = K1 + K2 CMRs are configured in the UE. s ≦8. K s The CMRs correspond to NZP-CSI-RS resource sets for channel measurement. K1 and K2 are the numbers of CMRs in the two CMR groups, respectively. N (N sets) CMR pairs (resource pairs) are configured by higher layers by selecting from all possible pairs. N=1, K s =2 is supported. max Support for K = 2 is an optional feature for the UE. S,max =X support is an optional feature for the UE. Each CMR can contain up to 32 CSI-RS ports, depending on the UE capabilities. Each CMR pair is associated with one CRI value.

[0148] The bitmap signaled by RRC indicates N (N=1, 2) CMR pairs actually used for NCJT measurement by indicating one CMR from each CMR group. The UE measures single-TRP CSI for TRP1 and single-TRP CSI for TRP2 using CMRs in the two CMR groups, and measures NCJT CSI using N CMR pairs.

[0149] The UE selects one or more CSIs to report based on the mode (CSI reporting mode) configured by csi-ReportMode. csi-ReportMode indicates one of the following two modes (NCJT CSI modes): Mode 1 and Mode 2. ◆ Mode 1 The UE may be configured to report X CSIs associated with single-TRP measurement hypotheses and one CSI associated with the NCJT measurement hypothesis. X = 0, 1, 2. If X = 2, two CSIs are associated with two different single-TRP measurement hypotheses with multiple CMRs from different CMR groups. Support for X = 1, 2 is an optional UE feature for UEs that support Option 1. ◆ Mode 2 The UE is configured to report one CSI associated with the best one of the NCJT and single-TRP measurement hypotheses.

[0150] In Mode 1, the UE reports a total of X+1 CSIs, including X (X=0, 1, 2) single-TRP CSIs and one NCJT CSI. In Mode 2, the UE reports one best CSI (one CSI) from all single-TRP CSIs and one NCJT CSI.

[0151] Within one CSI report, up to two single-TRP CSIs and one NCJT CSI can be reported (mode 1 with X=2). The NCJT CSI includes one CRI, two RIs (with one joint RI index), two PMIs, two LIs, and one CQI (up to four layers). The single-TRP CSI is the same as the existing CSI, and includes one CRI, one RI / PMI / LI, and one or two CQIs (up to eight layers, one CQI per CW).

[0152] New mapping orders (tables) of multiple fields within one CSI report are defined for some of the following cases: ◆ Wideband CSI mapping order for mode 1 with X=0. Wideband CSI is supported only for mode 1 with X=0, i.e., NCJT CSI. ◆ CSI Part 1 mapping order for modes 1 and 2. ◆ CSI Part 2 wideband mapping order for modes 1 and 2. ◆ CSI Part 2 subband mapping order for modes 1 and 2.

[0153] (CJT CSI / Type-2 Codebook) In the ideal case (where four TRPs are co-located), a joint estimation of the aggregated channel matrix H can be performed, and a joint precoding matrix V can be fed back. However, the large-scale path losses of the four paths can vary significantly. A joint precoding matrix V based on a constant module codebook is not accurate. In this case, the feedback per TRP and inter-TRP coefficients can be matched by the current NR Type-2 codebook.

[0154] For a CJT of up to four TRPs in FR1, the selection of the four TRPs may be semi-static. Therefore, the selection and configuration of the four CMRs (four CSI-RS resources) for channel measurement may also be semi-static. Dynamic indication of the four TRPs from a list of CSI-RS resources is also possible, but unlikely.

[0155] The path losses from the four TRPs to the UE are different, which makes it difficult to simply report one aggregated CSI that represents the joint channel matrix.

[0156] Considering fallback operation to NCJT (i.e., single TRP), CSI per TRP (i.e., single TRP CSI like NCJT CSI in Rel. 17) is also considered.

[0157] 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. For CJT multi-TRP for FDD, an extended (Rel. 16) Type 2 codebook and an additional extended (Rel. 17) Type 2 PS codebook are considered.

[0158] W1 (matrix representing SD DFT vector) / W for each TRP f (the matrix representing the FD DFT vector) may be the same or different. l (NZC) may be different. W1 / W for each TRP f / W l may be selected jointly or individually. W1 / W f / W l Different scenarios with different options are preferable for the design of W. φ may be reported as separate items or l These used policies relate to deployment scenarios (e.g., intra-site multi-TRP or inter-site multi-TRP).

[0159] For example, the precoding matrix for a 4-TRP CJT CSI (codebook) is W1 / W f / W l The W1 for each TRP may be the same or different, selected jointly or individually. l may be different and may be selected jointly or individually. fmay be the same or different, and may be jointly or individually selected.

[0160] There are two codebook mode settings for FD basis selection. In mode 1, we denote the FD basis offset for the j-th selected CSI-RS resource for j=2,...,N by i 1,9 In Mode 2, i 1,9 No reporting is required. All CSI-RS resources have the same FD basis selection.

[0161] ◆Mode 1 is SD / FD basis selection per TRP / TRP group. It allows independent FD basis selection across N TRPs / TRP groups. For example, its codebook structure is given by the following formula G1, where N is the number of TRPs or TRP groups.

[0162] ◆Mode 2 is SD basis selection per TRP / TRP group (port group or resource) and joint / common FD basis selection (across N TRPs / TRP groups). For example, its codebook structure is given by the following formula G2, where N is the number of TRPs or TRP groups.

[0163] In these two modes, detailed designs such as parameter combination, basis selection, TRP (group) selection, reference amplitude, and W2 quantization method may be shared.

[0164] For the enhanced Type II codebook for CJT (Type 2 CSI for CJT in Rel. 18), the UE may configure the higher layer parameter codebookType set to 'typeII-CJT-r18'. For the further enhanced Type II port selection codebook for CJT (Type 2 PS CSI for CJT in Rel. 18), the UE may configure the higher layer parameter codebookType set to 'typeII-CJT-PortSelection-r18'.

[0165] The UE uses N TRP ∈{1,2,3,4} CSI-RS resources can be configured.

[0166] In the extended type 2 codebook for CJT, the upper layer parameter paramCombination-CJT-L-r18 determines {L1,...,L N_TRP} value of N L A set of ∈{1,2,4} combinations is set. N L The value of is set by the higher layer parameter numberOfSDCombinations.

[0167] In the CJT additional extended type 2 PS codebook, the upper layer parameter paramCombination-CJT-PS-alpha-r18 determines {α1,...,α N_TRP} value of N L A set of ∈{1,2,4} combinations is set. N L The value of is set by the higher layer parameter numberOfSDCombinations-PS.

[0168] The UE may configure the upper layer parameter restrictedCMR-Selection. If restrictedCMR-Selection is configured, the number of selected CSI-RS resources N is NTRP Otherwise, the UE TRP , we expect to select N CSI-RS resources, and the selection is TRP The value is reported using a bitmap of bits.

[0169] In selecting / reporting an SD beam, selection / reporting of an SD beam per CSI-RS resource is applied.

[0170] In the extended type 2 codebook for CJT, the precoding matrix indicated by PMI is Σ j=1 N L σ_j +M v vectors, where {σ1,...,σ N} is 1≦σ1<…<σ N ≦N TRP are the indices of the N CSI-RS resources selected in ascending order so that TRP may be the number of CSI-RS resources configured for CSI reporting, or may be the number of TRPs for CJT. σ_1 ,...,L σ_N} is {L1,...,L N_TRP} is the corresponding value from the selected combination.

[0171] j=1,...,N, i=0,1,...,L σ_j −1, L corresponding to the j-th selected CSI-RS resource σ_j The vectors vm_1,f^(i),m_2,f^(i) are 1,1 , i 1,2 It is displayed / reported by, where i 1,1 , i 1,2 is given by the following equation G3: 1,1 =[i 1,1,1 ...i 1,1,N ] i 1,1,j =[q 1,j q 2,j ] q 1,j ∈{0,1,...,O1-1} q 2,j ∈{0,1,...,O2-1} i 1,2 =[i 1,2,1...i 1,2,N ] i 1,2,j ∈{0,1,...,C(N1N2,L σ_j )-1} (G3)

[0172] In the additional extended type 2PS codebook for CJT, the precoding matrix indicated by PMI is Σ j=1 N L σ_j +M vectors, where {σ1,...,σ N} is 1≦σ1<…<σ N ≦N TRP are the indices of the N CSI-RS resources selected in ascending order so that L σ_j =K 1,σ_j / 2, K 1,σ_j =α σ_j *P CSI-RS {α σ_1 ,...,α σ_N} is {α1,...,α N_TRP} is the corresponding value from the selected combination.

[0173] j=1,...,N, i=0,1,...,L σ_j -1, L σ_j vectors v m_j^(i) Based on this, P of the j-th selected CSI-RS resource is CSI-RS From the ports, K 1,σ_j ports are selected and i 1,2 It is displayed / reported by, where i 1,2 is given by the following equation G4: 1,2 =[i 1,2,1 ...i 1,2,N ] i 1,2,j ∈{0,1,...,C(P CSI-RS ,L σ_j )-1} (G4)

[0174] In the present disclosure, the CJT codebook, the CJT type 2 codebook, the CJT extended type 2 codebook, the Rel. 18 CJT type 2 codebook, type II-CJT-r18, the CJT supplemented extended type 2 PS codebook, the Rel. 18 CJT type 2 PS codebook, and type II-CJT-PortSelection-r18′ may be read interchangeably.

[0175] (Doppler CSI / Type-2 Codebook) It is being considered to extend / improve CSI reporting for UEs moving at high / medium speeds by utilizing time-domain correlation / Doppler-domain (DD) information. For example, it is being considered to improve the extended (Rel. 16) Type-2 codebook and the additional extended (Rel. 17) Type-2 PS codebook without changing the spatial and frequency domain basis, and to report from the UE the time-domain channel characteristics (time-domain correlation profile) measured via the tracking CSI-RS (TRS).

[0176] 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.

[0177] TRS is supported to track Doppler shift. However, TRS has the following problems: ◆ 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.

[0178] 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.

[0179] The CMR can be used to measure the effect of Doppler shift, but the RS used for the measurement depends on the UE implementation.

[0180] 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.

[0181] 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.

[0182] A CSI-RS measurement window and a CSI reporting window 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.

[0183] Assuming that the CSI is reported in slot n, the length of the basis vectors (DFT basis vectors) in the Doppler domain (DD) / time domain (TD) (the number of DD / TD bases) 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 W meas 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:

[0184] CSI reporting window duration W CSI = dN4, where d and N4 are determined by the CMR setting. The start of the CSI reporting window is slot l. l = (nN CSI,ref ) may be used. l=(n+δ) may be used. δ={0,2} may be used, or δ={0,1,2} may be used.

[0185] A d-slot may be of duration in DD units.

[0186] When UE-side prediction is assumed, the UE is supported to predict the CSI / channel after slot l, and the position of slot l (from multiple candidate values) is configured by the base station via higher layer signaling. The multiple candidates for the slot l position are determined based on the existing CSI reference resource position (nNCSI,ref ) and (n+δ), where δ>0. The existing CSI reference resource in the existing operation, i.e., (nN CSI,ref ) is reused / repurposed to indicate the position of the last CSI-RS occasion used for CSI reporting.

[0187] For the parameter δ, an additional value of 2 is supported.

[0188] N4 is set by the base station via an upper layer parameter N4.

[0189] When N4=1, the DD basis may be the identity. There may be no DD compression. In this case, the codebook structure may be, for example, the following formula H1:

[0190] For N4>1, the Doppler domain orthogonal DFT basis may be commonly selected for all SD / FD basis sets. In this case, the codebook structure may be, for example, the following formula H2:

[0191] Only Q>1, which indicates the number of selected Doppler domain (DD) basis vectors, is allowed. The detailed design of the SD / FD basis with associated UCI parameters follows existing specifications.

[0192] For an enhanced Type II codebook for predicted PMI (Rel. 18 Type 2 CSI for predicted PMI), the UE may configure the higher layer parameter codebookType set to 'typeII-Doppler-r18'. For a further enhanced Type II port selection codebook for predicted PMI (Rel. 18 Type 2 PS CSI for predicted PMI), the UE may configure the higher layer parameter codebookType set to 'typeII-Doppler-PortSelection-r18'.

[0193] In the present disclosure, the Doppler codebook, the Doppler type 2 codebook, the extended type 2 codebook for predicted PMI, the Rel. 18 type 2 CSI codebook for predicted PMI, type II-Doppler-r18, the additional extended type 2 PS codebook for predicted PMI, the Rel. 18 type 2 PS codebook for predicted PMI, and type II-Doppler-PortSelection-r18 may be interpreted as interchangeable.

[0194] (TDCP Reporting) Reporting of time domain channel properties (TDCP) from the UE is under consideration.

[0195] The report quantity (upper layer parameter reportQuantity) is set to 'tdcp', the upper layer parameter Y ≥ 1, and the delays {D1,...,D Y}, and for the CSI-ReportConfig with TDCP =[k1 ... k Y ] is reported, where k i ∈{0,...,15}. For i=1,...,Y, the corresponding amplitude value is 1-a i It is obtained from k i From a i The mapping to is defined in the specification.

[0196] For Y>1, if the upper layer parameter phase is set, the TDCP phase c TDCP =[c1 ... c Y ] is reported, where c i ∈{0,...,15}. The corresponding phase value is exp(j2πc i / 16).

[0197] (CSI-RS Port) In Rel. 15, for example, the CSI-RS is used as a DL RS for at least one of channel state information (CSI) acquisition, beam management (BM), beam failure recovery (BFR), and fine time and frequency tracking. The CSI-RS supports 1, 2, 4, 8, 12, 16, 24, and 32 ports (antenna ports, CSI-RS ports). The CSI-RS supports periodic, semi-persistent, and aperiodic transmission. The frequency density of the CSI-RS is configurable to adjust overhead and CSI estimation accuracy.

[0198] FIG. 1 is a diagram showing an example of the location of CSI-RSs within a slot. Each row in the table indicates a row number, the number of ports, the frequency domain density, the CDM type, the time and frequency (time / frequency) location (the location of the component resource (k bar, l bar)), the code division multiplexing (CDM) group index, and the location of each resource within the component resource ((RE, symbol), (k', l')). Here, the time / frequency location is the location of the time and frequency resource (component resource) of the CSI-RS corresponding to one port. The notation k bar is an overlined "k." The k bar indicates the starting resource element (RE) index of the component resource, and the l bar indicates the starting symbol (OFDM symbol) index of the component resource.

[0199] CDM groups include no CDM (no CDM, N / A), FD-CDM2, CDM4, and CDM8. FD-CDM2 multiplexes two-port CSI-RSs at the same time and frequency by multiplying a frequency domain (FD)-orthogonal cover code (OCC) of length 2 on an RE-by-RE basis (FD2). CDM4 multiplexes four-port CSI-RSs at the same time and frequency by multiplying a length-2 FD-OCC with a length-2 time domain (TD)-OCC on an RE-by-symbol basis (FD2TD2). CDM8 multiplexes eight-port CSI-RSs at the same time and frequency by multiplying a length-2 FD-OCC with a length-4 TD-OCC on an RE-by-symbol basis (FD2TD4).

[0200] (gNB Antenna Layout) Figure 2 shows a table of the association between the supported number of CSI-RS ports and the gNB antenna layout ((N1, N2) and (O1, O2) settings) for a single panel of the existing specifications. Figure 3 shows a table of the association between the supported number of CSI-RS ports and the gNB antenna layout ((N g , N1, N2) and (O1, O2) settings).

[0201] (More than 32 CSI-RS Ports) Since the maximum number of CSI-RS ports, 32, is greater than the maximum number of layers, 8, the UE can measure many channel conditions, improving measurement accuracy.

[0202] In Rel. 19 and later, massive MIMO using more than 32 ports is being considered.

[0203] Targeting FR1, a CSI supporting up to 128 CSI-RS ports is being considered. Specifically, the following items are being considered: ◆ Item 2a: An improvement to the Type 1 codebook based on an extension of the existing codebook and assuming existing CSI-RS resources (with up to 32 CSI-RS ports per resource) to support a total of up to 128 CSI-RS ports across all resources. ◆ Item 2b: An improvement to the Type 2 codebook based on an extension of the existing codebook and assuming existing CSI-RS resources (with up to 32 CSI-RS ports per resource) to support a total of up to 128 CSI-RS ports across all resources, without changing any codebook parameters other than the introduction of an additional value for the codebook parameter for the number of ports. ◆Item 2c: Extension of CRI-based CSI reporting (reporting of CQI / PMI / RI calculated per CRI for one or more CRIs) for hybrid beamforming supporting up to a total of 128 CSI-RS ports across all resources without new codebook design, using up to 32 CSI-RS ports per resource. <Number of new ports and new (N1, N2)> Regarding items 2a and 2b, in the extended CB for the number of new ports (more than 32), it is considered that the following several combinations (Figure 4) will be supported for the total number P of CSI-RS ports across multiple aggregated resources and (N1, N2). ◆P=48, (N1,N2)=(8,3) ◆P=48, (N1,N2)=(6,4) ◆P=64, (N1,N2)=(16,2) ◆P=64, (N1,N2)=(8,4) ◆P=128, (N1,N2)=(16,4) ◆P=128, (N1,N2)=(8,8)

[0204] The extended CB may be an extended CB based on Type 1 CB, or (Rel. 16) an extended CB based on Extended Type 2 CB, or (Rel. 18) an extended CB based on Type 2 Doppler CB.

[0205] In the expansion port selection (PS) CB, the number of new ports P CSI-RS= {48,64} is under consideration for support. The extended PS CB may be a (Rel. 17) additional extended type 2 PS CB.

[0206] <Multi-CRI Reporting> Regarding item 2c, it is considered that multi-CRI reporting uses an extended CB based on at least one of Type 1 CB and Type 2 CB.

[0207] The final (actually used) number of CMRs, K, for the set number of CMRs S The supported values ​​of may differ between an extended CB based on a Type 1 CB and an extended CB based on a Type 2 CB.

[0208] In the CSI-RS port extension / improvement based on CRI for more than 32 CSI-RS ports, K S The value and the maximum number of ports per NZP CSI-RS resource (CMR) may be based on at least one of several combinations of: S =2,3,4, Maximum number of ports per resource = 32 ◆K S =5,6,7,8, while max number of ports per resource = 16

[0209] In the present disclosure, multi-CRI reporting, multi-CRI based reporting, CSI reporting based on the setting of the reporting amount of multi-CRI, extended CB for multi-CRI, and one CSI report including multiple CRIs may be read as interchangeable.

[0210] (Analysis) The method of setting / reporting CSI to support more than 32 CSI-RS ports has not been thoroughly considered. If such a method is not thoroughly considered, there is a risk that communication quality / throughput will deteriorate.

[0211] Therefore, the inventors have studied methods for setting / reporting CSI and have come up with the following embodiments.

[0212] 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.

[0213] (Various Reinterpretations) In the present disclosure, a word enclosed in "( )" in a sentence may indicate an explanation of the word immediately preceding it (for example, an explanation of spelling), a paraphrase, a specific example, a supplementary explanation, etc. Furthermore, in the present disclosure, a word enclosed in "[ ]" in a sentence may be interpreted including the word in the meaning of the entire sentence, or may be interpreted excluding (ignoring) the word in the meaning of the entire sentence. Note that "( )" and "[ ]" may also be used for purposes / meanings other than those mentioned above.

[0214] 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."

[0215] 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.

[0216] 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.

[0217] 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, other messages (e.g., messages from the core network such as positioning protocol (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP)) messages), or a combination thereof.

[0218] 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.

[0219] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0220] In the present disclosure, ceil(x), ceiling function, and ceiling function may be interchangeable. In the present disclosure, floor(x), floor function, and floor function may be interchangeable. In the present disclosure, sqrt(x), square root of x, and root x may be interchangeable. In the present disclosure, x mod y, mod(x, y), mod function, and modulo operation may be interchangeable. In the present disclosure, Σ i=M M+N-1 f(i),Σ i=MM+N-1 f i , f(i) or f(i) for i=M, M+1, ..., M+N-1 i summation, f(M)+f(M+1)+...+f(M+N-1), f M +f M+1 +...+f M+N-1 , may be read interchangeably. C(n, k) is the number of combinations of selecting k values ​​from n values ​​(combinatorial coefficient), binomial coefficients, n C k , C n k , may be read as interchangeable. In the present disclosure, x / / y and floor(x / y) may be read as interchangeable.

[0221] In this disclosure, A b , A_b, Ab, and A with b added to the bottom right may be read interchangeably. c , A^c, and the notation of A with c added to the upper right may be read interchangeably. b c , A_b^c, and the notation in which b is added to the bottom right of A and c is added to the top right of A may be read interchangeably. ~ may be expressed by adding 〜 to the x, or may be referred to as x tilde. - may be represented by placing a - on top of the x, or may be referred to as an x-bar. ＾ may be represented by placing a ^ above the x, or may be called an x-hat.

[0222] In the present disclosure, FR may be, for example, at least one of FR1, FR2, FR2-1, FR2-2, FR3, sub-terahertz, and terahertz. In the present disclosure, the frequency range corresponding to FR1 may be 410-7125 MHz. In the present disclosure, FR2 may include FR2-1 and FR2-2, and the frequency range corresponding to FR2-1 may be 24250-52600 MHz, and the frequency range corresponding to FR2-1 may be 52600-71000 MHz.

[0223] In this disclosure, the following abbreviations may be used: FDM: frequency division multiplexing TDM: time division multiplexing

[0224] In the present disclosure, the terms indicate, report, and select may be read interchangeably.

[0225] In the present disclosure, beam, SD beam, precoder, antenna port, vector, SD basis, SD vector, and SD basis vector may be interchangeable. In the present disclosure, vector, beam, SD beam, SD vector, SD basis, and SD basis vector may be interchangeable.

[0226] In the present disclosure, codebook (CB), codebook type, CSI, and CSI report may be interchangeable. In the present disclosure, Type 1 CB, Type 1 CSI, Type 1 CSI report, Type 1 single panel (SP) CB, and Type 1 multi-panel (MP) CB may be interchangeable. In the present disclosure, Type 1 SP CB and Type 1 SP CSI may be interchangeable. In the present disclosure, Type 1 MP CB and Type 1 MP CSI may be interchangeable.

[0227] In the present disclosure, a transport block (TB) and a codeword (CW) may be interchangeable. In the present disclosure, a (WB / SB) CQI for an i-th TB and an i-th (WB / SB) CQI may be interchangeable.

[0228] In the present disclosure, the number of extended ports, the number of extended CSI-RS ports, the new P CSI-RS , P new , new port number, number of ports greater than 32, 48 / 64 / 72 / 96 / 128, may be read as interchangeable. In the present disclosure, extended ports, extended CSI-RS ports, new ports, ports greater than 32, 48 / 64 / 72 / 96 / 128 ports, and ports associated with new port CSI-RS resources may be read as interchangeable.

[0229] In the present disclosure, the number of existing ports, the number of existing CSI-RS ports, the number of existing P CSI-RS , P legacy , 32 or less ports may be read as interchangeable. In the present disclosure, legacy ports, legacy CSI-RS ports, 32 or less ports, and ports associated with legacy port CSI-RS resources may be read as interchangeable.

[0230] In the present disclosure, (N1, N2), (N1, N2) setting, (N1, N2) value, n1-n2, antenna setting, antenna placement, antenna position, gNB antenna, two-dimensional antenna, two-dimensional placement, two-dimensional position, two-dimensional placement setting, and setting regarding the size of the two-dimensional matrix for antenna placement / beam selection may be read interchangeably.

[0231] In the present disclosure, the terms "existing (N1, N2)", "existing (N1, N2) setting", "(N1, N2) for the number of existing ports", "setting for a two-dimensional antenna arrangement for 32 or fewer ports", and "first setting for a two-dimensional arrangement of multiple antennas for 32 or fewer ports" may be interchangeable. In the present disclosure, the terms "new (N1, N2)", "new (N1, N2) setting", "(N1, N2) for the number of expansion ports", "setting for a two-dimensional antenna arrangement for more than 32 ports", and "second setting for a two-dimensional arrangement of multiple antennas for more than 32 ports" may be interchangeable. In the present disclosure, the terms "new (N g1 ,N g2), a third setting for a two-dimensional arrangement of multiple groups of antennas based on (N1, N2) for an extended port number, a setting for a two-dimensional panel arrangement for more than 32 ports, and a setting for a two-dimensional arrangement of multiple groups of antennas each associated with multiple CSI-RS resources may be read as interchangeable.

[0232] In the present disclosure, x-port CSI-RS resources, CSI-RS resources associated with x-ports, and CSI-RS resources using x-ports may be read interchangeably.

[0233] In the present disclosure, CSI-RS resources, existing port CSI-RS resources, CSI-RS, CMR, port group, group of 32 or less ports, port group, group of 32 or less ports associated with one CSI-RS resource, CSI-RS resources associated with a group of 32 or less ports, CSI-RS resources associated with a group of N1N2O1O2 SD beams based on existing (N1, N2), CSI-RS resources associated with a group of N1N2O1O2 gNB antennas based on existing (N1, N2), existing N1N2O1O2 antennas, existing N1N2O1O2 SD beams may be read as interchangeable.

[0234] In the present disclosure, groups, sets, blocks, and pools of 32 or less ports for supporting an expanded port count may be interchangeable. In the present disclosure, groups, sets, blocks, and pools of N1N2O1O2 SD beams based on existing (N1, N2) for supporting an expanded port count may be interchangeable. In the present disclosure, groups, sets, blocks, pools, and panels of N1N2O1O2 gNB antennas based on existing (N1, N2) for supporting an expanded port count may be interchangeable.

[0235] In the present disclosure, CSI-RS resources for extended port numbers, new port CSI-RS resources, new port CMR, extended port CSI-RS resources, extended CSI-RS, extended CMR, new group, multiple port group, CSI-RS resources associated with more than 32 ports, CSI-RS resources associated with a group of N1N2O1O2 SD beams based on a new (N1, N2), CSI-RS resources associated with a group of N1N2O1O2 gNB antennas based on a new (N1, N2), new N1N2O1O2 antennas, and new N1N2O1O2 SD beams may be read interchangeably.

[0236] In this disclosure, (N g1 ,N g2 ), ng1-ng2, panel setting, gNB panel setting, arrangement / position / two-dimensional arrangement of CSI-RS resources / port groups / panels / antenna groups may be read interchangeably. g , ng, panel setting, gNB panel setting, CSI-RS resource / port group / panel / antenna group, may be read interchangeably.

[0237] In the present disclosure, new N1N2 and N1×N2 based on new (N1, N2) may be read interchangeably. In the present disclosure, existing N1N2 and N1×N2 based on existing (N1, N2) may be read interchangeably.

[0238] In the present disclosure, new N1N2O1O2 and N1O1×N2O2 based on new (N1, N2) may be read interchangeably. In the present disclosure, existing N1N2O1O2 and existing (N1, N2)-based N1O1×N2O2 may be read interchangeably.

[0239] In the present disclosure, the positions within new (N1, N2), the positions of gNB antennas based on new (N1, N2), and the positions within N1N2O1O2 gNB antennas based on new (N1, N2) may be interchangeable. In the present disclosure, the positions within existing (N1, N2), the positions of gNB antennas based on existing (N1, N2), the positions within N1N2O1O2 gNB antennas based on existing (N1, N2), and the positions within N1N2O1O2 existing gNB antennas may be interchangeable.

[0240] In this disclosure, the terms "SD beam based on new (N1, N2)" and "SD beam among N1N2O1O2 SD beams based on new (N1, N2)" may be interchangeable. In this disclosure, the terms "position within existing (N1, N2)," "SD beam based on existing (N1, N2)," and "SD beam among N1N2O1O2 SD beams based on existing (N1, N2)" may be interchangeable.

[0241] In the present disclosure, 1,1 ,i 1,2 ), the index indicating the beam, the first index, the third index, and the two-dimensional index may be read interchangeably. 1,4 The index indicating the CSI-RS resource corresponding to the beam, the second index, the one-dimensional index, and the two-dimensional index may be interpreted as interchangeable.

[0242] In the present disclosure, one or more channel measurement resources associated with more than 32 ports (the number of extended ports), one or more CMRs, one or more new port CSI-RS resources, multiple existing port CSI-RS resources, one or more new groups, and corresponding resource sets for channel measurement may be interchangeable. In the present disclosure, multiple channel measurement resources, one or more CMRs, multiple existing port CSI-RS resources, and corresponding resource sets for channel measurement may be interchangeable. In the present disclosure, one or more IMRs, one or more CSI-RS / CSI-IM resources for interference measurement, and corresponding resource sets for interference measurement may be interchangeable.

[0243] In this disclosure, the terms "channel measurement occasion" and "at least one CSI-RS transmission occasion" may be interchangeable. In this disclosure, the terms "interference measurement occasion" and "CSI-RS / CSI-IM occasion" may be interchangeable.

[0244] In the present disclosure, port group, SD beam group, orthogonal beam group, orthogonal vector group, orthogonal SD vector group, orthogonal SD basis vector group, N1N2 SD beams, N1N2 SD beams identified by q1 = {0, 1, ..., O1-1} and q2 = {0, 1, ..., O2-1}, one port group among O1O2 port groups, beam group, antenna / port group, and group including a number of beams determined by the number of two-dimensional antennas N1N2 may be read interchangeably.

[0245] In the present disclosure, the port index and the port number may be interchangeable. In the present disclosure, the port index i, the CSI-RS antenna port index 3000+i, and the PDSCH antenna port index 1000+i may be interchangeable.

[0246] In the present disclosure, the terms CSI field, CSI content, report content, report quantity, and subband may be read interchangeably.

[0247] In the present disclosure, wideband CSI and wideband frequency granularity may be interchangeable. In the present disclosure, subband CSI and subband frequency granularity may be interchangeable.

[0248] Wideband frequency granularity (the CSI reporting setting has wideband frequency granularity) may mean at least one of the following settings: ◆ cqi-FormatIndicator='widebandCQI' and pmi-FormatIndicator is set to 'widebandPMI'. ◆ reportQuantity is set to 'cri-RI-PMI-CQI' or 'cri-RI-LI-PMI-CQI' and cqi-FormatIndicator='widebandCQI' and pmi-FormatIndicator is set to 'widebandPMI'. ◆ reportQuantity is set to 'cri-RI-CQI' and cqi-FormatIndicator='widebandCQI'.

[0249] The multiple subbands for a given CSI report n, indicated by the upper layer parameter csi-ReportingBand with a value set to '1', may be numbered consecutively in ascending order, with the lowest subband of csi-ReportingBand with a value set to '1' being subband 0. The even-indexed subbands may be subbands 0, 2, 4, .... The odd-indexed subbands may be subbands 1, 3, 5, ....

[0250] (Wireless Communication Method) A UE may calculate one or more CSIs by measuring one or more CSI-RSs (resources) using multiple ports (CSI-RS ports, antenna ports) based on a CSI reporting configuration (CSI-ReportConfig), and report the one or more CSIs. The number of multiple ports may be greater than 32.

[0251] <Mapping Order of Multiple CSI Fields in a CSI Report on PUCCH> In one CSI report on PUCCH, at least one mapping order among several tables below may be applied: ◆ Table C-7 (FIG. 5) showing the mapping order of multiple CSI fields in one CSI report in the case where pmi-FormatIndicator=widebandPMI and cqi-FormatIndicator=widebandCQI, or where reportQuantity is set to 'cri-RI-CQI' and cqi-FormatIndicator=widebandCQI. ◆ Table C-7A (FIG. 6) showing the mapping order of CSI fields in the case where pmi-FormatIndicator=widebandPMI, cqi-FormatIndicator=widebandCQI, csi-ReportMode=Mode 1, and numberOfSingleTRP-CSI-Mode1=0. * Table C-9 showing the mapping order of multiple CSI fields in CSI Part 1 of one CSI report in the case where pmi-FormatIndicator=subbandPMI or cqi-FormatIndicator=subbandCQI (Figure 7). * Table C-10 showing the mapping order of multiple CSI fields in CSI Part 2 wideband of one CSI report in the case where pmi-FormatIndicator=subbandPMI or cqi-FormatIndicator=subbandCQI (Figure 8). * Table C-11 showing the mapping order of multiple CSI fields in CSI Part 2 subband of one CSI report in the case where pmi-FormatIndicator=subbandPMI or cqi-FormatIndicator=subbandCQI (Figure 9). The subbands for a given CSI report n, indicated by the upper layer parameter csi-ReportBand having a value set to '1', are numbered consecutively in ascending order, starting with subband 0 for the lowest subband of csi-ReportBand having a value set to '1'.

[0252] Different tables are defined for different codebook types / settings.

[0253] <Mapping Order of Multiple CSI Fields in a CSI Report on a PUSCH> In one CSI report on a PUSCH, at least one mapping order among several tables below may be applied: ◆ Table S-3 of the mapping order of multiple CSI fields in CSI Part 1 of one CSI report (FIG. 10). ◆ Table S-4 of the mapping order of multiple CSI fields in CSI Part 2 wideband of one CSI report (FIG. 11). ◆ Table S-5 of the mapping order of multiple CSI fields in CSI Part 2 subband of one CSI report (FIG. 12).

[0254] Different tables are defined for different codebook types / settings.

[0255] <Mapping Order of Multiple CSI Fields on PUSCH> A table indicating the mapping order of multiple CSI fields in CSI Part 1 of subband CSI is defined in the specification. Different tables are defined for different codebook types.

[0256] A table is defined in the specification that indicates the mapping order of multiple CSI fields in the wideband part of CSI part 2 of the subband CSI. Different tables are defined for different codebook types.

[0257] A table indicating the mapping order of multiple CSI fields in the subband part of CSI Part 2 of the subband CSI is defined in the specification. Different tables are defined for different codebook types. (Embodiment AH) <Embodiment AH0> A specific type of codebook / CSI with more than one CRI report within one CSI report may be supported / configured. The one CSI report may include RI / LI / PMI / CQI corresponding to each reported CRI. The specific type may be at least one of the following types: - Rel. 15 Type 1 CSI (Type 1 single panel codebook) - Rel. 15 Type 1 multi-panel CSI (Type 1 multi-panel codebook) - Rel. 15 Type 2 CSI (Type 2 codebook) - Rel. 15 Type 2 PS CSI (Type 2 port selection codebook) - Rel. 15 Type 2 PS CSI (Type 2 port selection codebook) Rel. 16 Type 2 CSI (extended Type 2 codebook) - Rel. 16 Type 2 PS CSI (extended Type 2 port selective codebook) - Rel. 17 Type 2 PS CSI (additional extended Type 2 port selective codebook) - Rel. 18 Type 2 Doppler CSI (extended Type 2 port selective codebook for predicted PMI) - Rel. 18 Type 2 PS Doppler CSI (extended Type 2 port selective codebook for predicted PMI)

[0258] At least one of the above types with more than one CRI report in one CSI report and multiple CSI-RS resources using more than 32 ports for channel measurement may be supported / configured, and one CSI report may include RI / LI / PMI / CQI corresponding to each reported CRI.

[0259] Separate / separate UE capabilities may be defined / reported for using a CSI-RS with 32 ports or less and supporting reporting of more than one CRI (RI / LI / PMI / CQI corresponding to each CRI) in one CSI report, and for using a CSI-RS with more than 32 ports and supporting reporting of more than one CRI (RI / LI / PMI / CQI corresponding to each CRI) in one CSI report.

[0260] Common / joint UE capabilities may be defined / reported for using a CSI-RS with 32 or fewer ports and supporting reporting of more than one CRI (RI / LI / PMI / CQI corresponding to each CRI) in one CSI report, and for using a CSI-RS with more than 32 ports and supporting reporting of more than one CRI (RI / LI / PMI / CQI corresponding to each CRI) in one CSI report.

[0261] The reporting of more than one CRI (RI / LI / PMI / CQI corresponding to each CRI) in one CSI report using a CSI-RS with 32 or fewer ports and the reporting of more than one CRI (RI / LI / PMI / CQI corresponding to each CRI) in one CSI report using a CSI-RS with more than 32 ports may be configured separately / separately.

[0262] It may be configured to use a CSI-RS with 32 or fewer ports to report more than one CRI (RI / LI / PMI / CQI corresponding to each CRI) in one CSI report, and to use a CSI-RS with more than 32 ports to report more than one CRI (RI / LI / PMI / CQI corresponding to each CRI) in one CSI report in a common / joint manner.

[0263] According to embodiment AH0, the UE / base station can determine an appropriate CSI calculation time for the enhanced CSI-RS.

[0264] Embodiment AH1: A new RRC parameter (e.g., cri-rnh-r19) may be introduced to indicate whether the UE is required to report more than one CRI in one CSI report, which may be accompanied by RI / LI / PMI / CQI corresponding to each reported CRI.

[0265] If the UE needs to report more than one CRI in one CSI report, then K S CSI-RS CSI-RS resources may be configured.

[0266] The UE may follow at least one of several options 1-x below.

[0267] Option 1-1: The number of reported CRIs may be configurable by a new RRC parameter (e.g., no-cri-r19). For example, no-cri-r19 indicates X, and X may be 1, 2, 3, or 4. The UE may report the number of CRIs to be configured. S CSI-RS X CRIs may be selected and reported from the X CSI-RS resources.

[0268] Option 1-2: The maximum number of reported CRIs may be configurable by a new RRC parameter (e.g., max-no-cri-r19). For example, max-no-cri-r19 may indicate X, where X=1, 2, 3, 4. The UE may report the maximum number of CRIs within the configured K S CSI-RS The UE may select and report Y (=1, 2, ..., X-1, or X) CRIs from the CSI-RS resources. In option 1-2, the actual number of CRIs to be reported may be determined by the UE.

[0269] - Option 1-3: The number of reported CRIs may be configurable by a new RRC parameter (e.g., max-no-cri-r19). For example, max-no-cri-r19 may indicate X, where X = 1, 2, 3, or 4. Another new RRC parameter (e.g., dynamic-selection-r19) may provide for enabling or disabling the UE's dynamic selection / determination of the number of reported CRIs. When dynamic-selection-r19 is disabled, the UE may report X CRIs (as in Option 1-1). When dynamic-selection-r19 is enabled, the UE may report Y (= 1, 2, ..., X-1, or X) CRIs (as in Option 1-2). dynamic-selection-r19 may be used to configure switching between Option 1-1 and Option 1-2, or to enable Option 1-2.

[0270] K to be set S CSI-RS The CSI-RS resources may have some constraints. For example, the K S CSI-RS The CSI-RS resources may have the same port number.

[0271] <<Details of Option 1-1>> The size (bit width) of the X number of CRIs (X number of fields) to be reported may be at least one of several options 1-1x below.

[0272] -- Option 1-1A: X*log2(K S CSI-RS ) bits. This option is used when the UE S CSI-RS This means selecting each CRI from each CMR.

[0273] -- Option 1-1B: log2(K S CSI-RS )+log2(K S CSI-RS -1)+log2(K S CSI-RS -2)+...+log2(KS CSI-RS -X+1) bits. This option is used when the UE S CSI-RS Select the first CRI from the CMRs (K S CSI-RS Select the second CRI from the (K −1) CMRs, S CSI-RS -2) selecting the third CRI from the CMRs, etc.

[0274] -- Option 1-1C: log2(C(K S CSI-RS ,X)) bits. This option is S CSI-RS C(K S CSI-RS , X) candidates, and the UE reports one of these candidates.

[0275] In the present disclosure, log2(x) and ceil(log2(x)) may be read as interchangeable. In the present disclosure, log2(x) + log2(y), ceil(log2(x) + log2(y)), and ceil(log2(x)) + ceil(log2(y)) may be read as interchangeable.

[0276] K S CSI-RS When = 8 and X = 4, according to option 1-1A, the size required for CRI reporting is 4 * 3 = 12 bits, according to option 1-1B, the size required for CRI reporting is 3 + 3 + 3 + 3 = 12 bits, and according to option 1-1C, the size required for CRI reporting is log270 = 7 bits.

[0277] K S CSI-RS When = 8 and X = 2, according to option 1-1A, the size required for CRI reporting is 2 * 3 = 6 bits, according to option 1-1B, the size required for CRI reporting is 3 + 3 = 6 bits, and according to option 1-1C, the size required for CRI reporting is log228 = 5 bits.

[0278] <<Details of Option 1-2>> The reporting of up to X CRIs may follow at least one of several options 1-2x below.

[0279] -- Option 1-2A: Two fields are used for CRI reporting. The first field may report the actual number of CRIs (e.g., Y) reported by the UE. The second field may report Y CRIs. For the size of the second field, any of the options 1-1A to 1-1C above may apply. In this case, the size of the second field may be variable. The second field may be placed in CSI Part 2.

[0280] Option 1-2B: Log2(Σ x=1 X C(K S CSI-RS ,x)) bits. This option is used for K S CSI-RS Σ for selecting Y (=1, 2, ..., X-1, or X) CRIs from CMRs x=1 X C(K S CSI-RS , x) candidates, and the UE reports one of these candidates.

[0281] K S CSI-RS For example, if ∑ = 8 and X = 4, then according to option 1-2A, the size of the first field is 2 bits, according to option 1-1A, the size of the second field is 12 bits, according to option 1-1B, the size of the second field is 12 bits, and according to option 1-1C, the size of the second field is 7 bits. According to option 1-2B, the size of the field is log2162 = 8 bits.

[0282] K S CSI-RSFor example, when ≠ 8 and X = 2, according to option 1-2A, the size of the first field is 1 bit, according to option 1-1A, the size of the second field is 6 bits, according to option 1-1B, the size of the second field is 6 bits, and according to option 1-1C, the size of the second field is 5 bits. According to option 1-2B, the size of the field is log236 = 6 bits.

[0283] Variation of Embodiment AH1 Within the CSI-RS resource set for channel measurement, X subsets of CSI-RS resources may be configured. S CSI-RS The UE may have CSI-RS resources. The UE may follow at least one of several options 1a- below:

[0284] - Option 1a-1: The UE selects and reports X CRIs from X subsets. The UE may select one CRI from one subset. The size of the CRI report is X*log2(K S CSI-RS ) bits.

[0285] - Option 1a-2: The UE selects and reports Y (=1, 2, ..., X-1, or X) CRIs from X subsets. The UE may select one CRI from one subset. In option 2, the actual number of CRIs reported is determined by the UE. The size of the CRI report may follow at least one of several options 1a-2x below: - Option 1a-2A: A first field may be used. The first field may indicate which subset has been selected by a bitmap of X bits. The first field may indicate Σ for selecting Y CRIs from X subsets. x=1 X One candidate from C(X,x) candidates is chosen as log2(Σ x=1 XC(X,x)) bits. A second field may be used to indicate the CRI in each selected subset. The second field may have a variable size. The second field may be placed in CSI Part 2. -- Options 1a-2B: X*log2(K S CSI-RS +1) bit.

[0286] - Option 1a-3: A new RRC parameter (e.g., dynamic-selection-r19) may provide for enabling or disabling dynamic selection by the UE of the number of reported CRIs. If dynamic-selection-r19 is 'disabled', the UE may report X CRIs (as in option 1a-1). If dynamic-selection-r19 is 'enabled', the UE may report Y (= 1, 2, ..., X-1, or X) CRIs (as in option 1a-2). dynamic-selection-r19 may be used to configure switching between options 1a-1 and 1a-2, or to enable option 1a-2.

[0287] The CSI-RS resources configured within the X subsets may have some restrictions, for example, the CSI-RS resources configured within the X subsets may have the same port number.

[0288] According to embodiment AH1, the UE can report multiple CRIs within one CSI report.

[0289] <Embodiment AH2> Other CSI parts of a CSI part containing a CRI may contain RI / LI / PMI / CQI corresponding to the CRI. The size of the other CSI parts may be a multiple of the actual number of CRIs to be reported. The actual number of CRIs to be reported may be X in Option 1-1 or Y from {1, 2, ..., X} in Option 1-2.

[0290] A CSI mapping order for multiple CRIs / multiple RIs / multiple LIs / multiple PMIs / multiple CQIs may be defined.

[0291] In an extension based on a Type 1 single panel codebook, at least one of the aforementioned tables C-1, C-3, C-7, and C-9 may be extended with at least one mapping order from several options 2-x below.

[0292] - Option 2-1: All reporting content (reporting volume) for the first reported CRI, all reporting content (reporting volume) for the second reported CRI, ..., all reporting content (reporting volume) for the Xth reported CRI.

[0293] - Option 2-2: For each report content (reporting amount), the multiple values ​​corresponding to the multiple CRIs are placed in the order of the multiple CRIs reported. The order of each report content (reporting amount) may be the same as the existing order (existing Type 1 single panel codebook report).

[0294] The mapping order (option 2-1 / 2) applied to the aforementioned tables C-1, C-3, C-7, and C-9 may be the same or different.

[0295] In other Rel. 15 / 16 / 17 / 18 CSI / codebook type-based extensions of the Type-1 single panel codebook, the same mapping order as in Option 2-1 / 2-2 may be applied.

[0296] <<Example of Option 2-1>> Figure 13 shows an example (Table C-7a) of the mapping order of CSI fields in wideband CSI based on Table C-7 / C-7A when X CRIs are reported. One CSI report #n may include X blocks in order. The i-th block (i = 1, 2, ..., X) may include at least one of the following CSI fields: - the i-th CRI; - a rank combination indicator for the i-th CRI; - a two-layer indicator for the i-th CRI; - zero-padding bits for the i-th CRI; - a PMI wideband information field X1 associated with the first resource in the CSI-RS resource pair for the i-th CRI; - a PMI wideband information field X2 associated with the first resource in the CSI-RS resource pair for the i-th CRI or codebook indices for two antenna ports. - PMI wideband information field X1 associated with the second resource in the CSI-RS resource pair for the i-th CRI, - PMI wideband information field X2 associated with the second resource in the CSI-RS resource pair for the i-th CRI or codebook indices for the two antenna ports, - Wideband CQI for the first TB for the i-th CRI.

[0297] <<Example of Option 2-2>> Figure 14 shows an example (Table C-9a) of the mapping order of CSI fields in CSI Part 1 of subband CSI based on Table C-9 when X CRIs are reported. CSI Part 1 of one CSI report #n may include multiple groups in order. One group may correspond to one reporting amount of CSI. One group may include X CSI fields in order. The i-th CSI field (i = 1, 2, ..., X) in one block may indicate a value corresponding to the i-th CRI of the reporting amount corresponding to that block. Each of the multiple groups may correspond to at least one of the following reporting amounts: - CRI. - RI. - Wideband CQI for the first TB. - Subband differential CQI for the first TB using ascending subband number order. - Indicator of the number of non-zero wideband amplitude coefficients M0 corresponding to Layer 0. - Indicator of the number of non-zero wideband amplitude coefficients M1 corresponding to layer 1, if two-layer PMI reporting is allowed according to rank constraints. If the rank according to the reported RI is equal to 1, this field is set to all zeros.

[0298] The multiple subbands indicated by the higher layer parameter csi-ReportingBand for a given CSI report n are numbered consecutively in ascending order, starting with the lowest subband in csi-ReportingBand as subband 0.

[0299] According to embodiment AH2, when a UE reports multiple CRIs in one CSI report, the UE can appropriately report reporting quantities other than the CRIs.

[0300] <Embodiment AH3> Restrictions on the X number of CRIs to be reported and other reporting quantities (RI / LI / PMI / CQI, etc.) may be defined in the specification or may be configurable by a new RRC parameter.

[0301] The constraints may include at least one of several options 3-x below.

[0302] Option 3-1: The RI for the X selected / reported CRIs is the same. In embodiment AH2, only one common RI may need to be reported for the X CRIs. In this case, reporting of the X RIs may not be required.

[0303] Option 3-2: The LI for the selected / reported X CRIs is the same. In embodiment AH2, only one common LI may be required to be reported for the X CRIs. In this case, reporting of the X LIs may not be required. Option 3-2 may be applied together with option 3-1.

[0304] - Option 3-3: Zero padding bits for the X selected / reported CRIs are included in only one common field.

[0305] Option 3-4: PMI wideband information field X1 (or multiple elements i within X1) for the X CRIs selected / reported x,y,z In embodiment AH2, only one common X1 may need to be reported for X CRIs. In this case, reporting of X X1s may not be required.

[0306] - Option 3-5: PMI wideband information field X2 (or multiple elements i within X2) for X CRIs to be selected / reported x,y,z (part of) are the same. In embodiment AH2, only one common X2 may be required to be reported for X CRIs. In this case, reporting of X X2s may not be required. Option 3-5 may be applied together with option 3-4. For example, in an extension based on Type 2 or Type 2 PS, the FD basis for X CRIs may be the same, and the i for X CRIs may be the same. 1,6 may be the same.

[0307] Option 3-6: The indicator of the total number of nonzero coefficients for layer i' for the X selected / reported CRIs is the same. In embodiment AH2, only one common indicator of the total number of nonzero coefficients may need to be reported for the X CRIs. In this case, reporting of X indicators of the total number of nonzero coefficients may not be required.

[0308] Figure 15 shows an example (Table C-7b) of the mapping order of CSI fields in wideband CSI based on Table C-7 / C-7A when X CRIs are reported. One CSI report #n may include X blocks in order.

[0309] The first block may include at least one of the following CSI fields: - the first CRI; - rank combination indicators for the X CRIs; - two-layer indicators for the X CRIs; - zero-padding bits for the X CRIs; - PMI wideband information field X1 associated with the first resource in the CSI-RS resource pair for the first CRI; - PMI wideband information field X2 associated with the first resource in the CSI-RS resource pair for the first CRI or codebook indices for two antenna ports; - PMI wideband information field X1 associated with the second resource in the CSI-RS resource pair for the first CRI; - PMI wideband information field X2 associated with the second resource in the CSI-RS resource pair for the first CRI or codebook indices for two antenna ports. - Wideband CQI for the first TB for the first CRI.

[0310] The second and subsequent (i-th for i=2,...,X) blocks may include at least one of the following CSI fields: - the i-th CRI; - the PMI wideband information field X1 associated with the first resource in the CSI-RS resource pair for the i-th CRI; - the PMI wideband information field X2 associated with the first resource in the CSI-RS resource pair for the i-th CRI or the codebook indices for the two antenna ports; - the PMI wideband information field X1 associated with the second resource in the CSI-RS resource pair for the i-th CRI; - the PMI wideband information field X2 associated with the second resource in the CSI-RS resource pair for the i-th CRI or the codebook indices for the two antenna ports; - the wideband CQI for the first TB for the i-th CRI.

[0311] According to embodiment AH3, the UE can appropriately report multiple CRIs and other reporting quantities corresponding thereto within one CSI report.

[0312] <Embodiment AH4> K S CSI-RS The ZP-IMR configuration for a CMR may follow at least one of the following options 4-x: - Option 4-1: Only one ZP-IMR is configured for all multiple CMRs. This option is suitable for obtaining the same interference from other serving cells. - Option 4-2: Multiple CMRs and multiple ZP-IMRs are mapped one-to-one. - Option 4-3: Both options 4-1 and 4-2 are supported, and the NW can configure either option 4-1 or 4-2.

[0313] When measuring ZP-IMR, the UE may assume the same QCL / TCI as the QCL / TCI of the CMR being measured.

[0314] K S CSI-RSThe NZP-IMR configuration for a CMR may follow at least one of the following options 4-x: - Option 4-4: Only one NZP-IMR is configured for all multiple CMRs. This option is suitable for obtaining different multi-user (MU) interference. - Option 4-5: Multiple CMRs and multiple NZP-IMRs are mapped one-to-one. - Option 4-6: Both options 4-4 and 4-5 are supported, and the NW can configure either option 4-4 or option 4-5.

[0315] When measuring NZP-IMR, the UE may assume the same QCL / TCI as the QCL / TCI of the CMR being measured.

[0316] In the present disclosure, ZP-IMR, ZP CSI-RS for interference measurement, IMR, CSI-interference measurement (IM) resource, and ZP-CSI-RS resource may be read as interchangeable.

[0317] In the present disclosure, NZP-IMR, NZP CSI-RS for interference measurement, IMR, NZP CSI-RS resource for interference measurement, and NZP CSI-RS resource may be read as interchangeable.

[0318] According to embodiment AH4, the UE can perform appropriate interference measurements for channel measurements.

[0319] ((Embodiment AN)) <Study 1> In addition to embodiment AH, there are other methods for reducing reporting overhead.

[0320] In the present disclosure, the wideband CQI may be reported for the entire CSI reporting band on a TB-by-TB basis, and the subband CQI may be reported for each subband within the CSI reporting band on a TB-by-TB basis.

[0321] In the present disclosure, the terms "reference CSI," "specific CSI," "reference CRI," and "specific CRI" may be interchangeable. In the present disclosure, the terms "CSI other than the reference CSI among multiple CSIs corresponding to multiple CRIs, non-reference CSI," and "non-specific CSI" may be interchangeable.

[0322] <Embodiment AN1> In multi-CRI reporting, overhead reduction may be achieved when reporting M CRIs and corresponding multiple CSIs for multiple wideband CQIs from M CSIs is configured by the gNB or determined and reported by the UE.

[0323] In the existing specification, when the rank is 4 or less, one wideband CQI of 4 bits is reported for one CSI (for only one TB or for the first TB). When the rank is greater than 4, two wideband CQIs for two TBs are reported, with the wideband CQI for the first TB having 4 bits and the wideband CQI for the second TB having 2 bits. In both of these cases, the subband CQI for each TB has 2 bits as a difference based on the wideband CQI for each TB.

[0324] The overhead reduction method may be based on at least one of several options:

[0325] ◆ Option 1: One or more wideband CQIs in the reference CSI of only one of the M CSIs may have 4 bits (may be quantized to 4 bits). The one or more wideband CQIs may include one or two wideband CQIs. If the rank is greater than 4, two wideband CQIs for two TBs are reported, and the wideband CQI for one TB may be quantized to 4 bits. Each wideband CQI in the remaining M-1 CSIs (M-1 non-reference CSIs) may have 2 bits (may be quantized to 2 bits) as a difference based on the wideband CQI of the reference CSI for each TB. The determination of the reference CSI may be based on at least one of the following several options 1x: - ◆ Option 1a: The reference CSI may be determined by the UE and may be implicitly indicated / reported by the mapping order of the CRIs in the CSI report. For example, when multiple CRI fields are reported, the CSI corresponding to the first placed CRI may be the reference CSI. -◆Option 1b: The reference CSI may be determined by the UE and explicitly indicated / reported using a new field (e.g., Reference CSI Indicator) in the CSI report. For example, the size of the new field may be log2(M) bits. -◆Option 1c: The reference CSI may be the CSI defined in the specification and corresponding to the CRI with the smallest or largest ID / index among the M CSIs corresponding to the M CRIs, or the CSI corresponding to the first or last CMR based on the configured CMR order.

[0326] ◆ Option 2: A separate reference CSI is determined from the M CSIs for each TB. The wideband CQI in the reference CSI for each TB may have 4 bits. In each TB, each wideband CQI in the remaining M-1 CSIs (M-1 non-reference CSIs) may have 2 bits as a difference based on the reference CSI for each TB. The determination of the reference CSI for each TB may be based on at least one of the following several options 2x: ◆ Option 2a: The reference CSI for each TB is determined by the UE, and one reference CSI for the first or second TB may be implicitly indicated / reported in the multiple CRI report. For example, when multiple CRI fields are reported, the CSI corresponding to the first CRI may be the reference CSI. The reference CSI for other TBs may be explicitly indicated / reported by a new field indicating the reference (CSI) for one TB. The new field may indicate the direct CSI or may indicate an offset based on another reference CSI (which is implicitly reported). - ◆ Option 2b: The reference CSI for each TB is determined by the UE and two reference CSIs may be explicitly indicated / reported by two new fields, each indicating a reference (CSI) for one TB.

[0327] ◆ Option 3: A reference TB is determined from M pieces of CSI, and only one reference CSI is determined in the reference TB. Only one wideband CQI in the reference CSI may have 4 bits. Each wideband CQI in CSI other than the reference CSI (each wideband CQI in the remaining M-1 pieces of CSI (M-1 non-reference CSI) in the reference TB and the wideband CQI in the M pieces of CSI in other TBs) may have 2 bits as a difference based on the reference CSI. The determination of the reference CSI may be based on Option 1a / 1b / 1c. The determination of the reference TB may be based on at least one of the following several Options 3x: - ◆ Option 3a: The reference TB is defined in the specification and may be the first TB or the second TB. - ◆ Option 3b: The reference TB is determined by the UE and may be explicitly indicated / reported by a new 1-bit field indicating either the first TB or the second TB.

[0328] ◆Variations: The reference CSI may correspond to the CQI that achieves the best modulation order (modulation method) / coding rate / frequency utilization efficiency among multiple CQIs corresponding to multiple CSIs, or may correspond to the best / highest CQI index, or may correspond to the best / highest measurement value (e.g., SINR).

[0329] If the rank is 4 or less, there may be no difference between options 1 to 3. If the rank is greater than 4, the results from options 1 to 3 are different.

[0330] The subband CQI may have two bits as a difference based on the wideband CQI of the reference CSI (of the reference TB) or may have two bits as a difference based on the wideband CQI of the corresponding CSI.

[0331] Below are some examples where M=4 CSIs are reported by the UE and wideband CQI is reported for each CSI per TB.

[0332] 16A shows an example of wideband CQI per CSI per TB when none of options 1 to 3 is applied. In this example, the wideband CQI per CSI per TB may have 4 bits.

[0333] 16B shows an example of wideband CQI per CSI per TB in Option 1. In this example, the reference CSI is the second CSI. The wideband CSI in the reference CSI for each TB has 4 bits. For each TB, the wideband CSI in CSI other than the reference CSI has 2 bits as the difference from the wideband CSI in the reference CSI.

[0334] 16C shows an example of wideband CQI per CSI per TB in Option 2. In this example, the reference CSI in the first TB is the second CSI, and the reference CSI in the second TB is the third CSI. The wideband CSI in the reference CSI for each TB has 4 bits. For each TB, the wideband CSI in CSI other than the reference CSI has 2 bits as the difference from the wideband CSI in the reference CSI.

[0335] 16D shows an example of wideband CQI per TB per CSI in Option 3. In this example, the reference TB is the first TB, and the reference CSI is the second CSI of the reference TB. The wideband CSI in the reference CSI has 4 bits. The wideband CSI in CSI other than the reference CSI has 2 bits as a difference from the wideband CSI in the reference CSI.

[0336] The size (bit width) of the CQI (at least one of the non-differential CQI and the wideband CQI of the reference CSI) may be a specific number of bits other than 4. For example, the specific number of bits may be 5. For the specific number of bits, a new table for mapping between the CQI index and the modulation order (modulation scheme) / coding rate / spectral efficiency may be defined in the specification.

[0337] The size (bit width) of the differential CQI (at least one of the differential CQI for a certain CQI, the wideband CQI other than the reference CSI, and the subband CQI) may be a specific number of bits other than 2. For example, the specific number of bits may be 1 bit or 3 bits. For the specific number of bits, a new table for mapping between the differential CQI value (index) and the offset level (for the CQI index) may be defined in the specification.

[0338] According to embodiment AN1, the UE can reduce overhead in multi-CRI reporting.

[0339] <Study 2> In embodiment AH, a configuration for multi-CRI CSI reporting, reporting of multiple CRIs, and corresponding multiple CSIs are described.

[0340] It is contemplated that a bitmap may be used in embodiment AH.

[0341] <Embodiment AN2> When a UE is configured to report more than one CRI and the RI / LI / PMI / CQI corresponding to each CRI, the size (number of bits) of the reported CRIs may be based on at least one of the following options:

[0342] ◆Details of Option 1-1 of Embodiment AH1 In Option 1-1 of embodiment AH1, the UE selects and reports X CRIs. The X CRIs to be reported may be based on the following options: ◆Option 1-1D: The X CRIs to be reported are based on K S CSI-RS The CRI may be indicated / reported by a bitmap of X bits. X bits in the bitmap may be 1. A 1 bit may indicate the corresponding CRI. For example, if three CMRs are configured and X=3 for reporting is configured, and the first, second, and fourth CMRs are selected and reported, the UE may report a bitmap of "1101".

[0343] ◆Details of Option 1-2 of Embodiment AH1 In Option 1-2 of embodiment AH1, the UE selects and reports up to X CRIs (any number of 1, 2, ..., X). The reported up to X CRIs may be based on the following options: ◆Option 1-2C: The reported up to X CRIs are based on K S CSI-RS The bitmap may be used to indicate / report a CRI. Bits 1 to X of the bitmap may be set to 1. A 1 bit may indicate the corresponding CRI. For example, if three CMRs are configured and reporting is configured up to X=3, and the first and fourth CMRs are selected and reported, the UE may report a bitmap of "1001".

[0344] When a bitmap / combination index is used to indicate / report multiple CRIs and embodiment AN1 is applied, an additional field may be used to indicate the reference CSI or its corresponding reference CSI. When multiple CRI values ​​are reported one-to-one within multiple CSIs, the reference CRI / reference CSI may be implicitly indicated by the mapping order within the CSI. For example, the first reported CRI value may be the reference CRI (reference CSI).

[0345] According to embodiment AN2, the UE can appropriately report multiple CRIs using a bitmap.

[0346] ((Embodiment AO)) <Study 1> In embodiment AH, the mapping order of multiple CSIs is described.

[0347] Considering that some content may be common among multiple CSIs, other variations are possible. For example, for a specific content such as RI, there may be one common RI instead of multiple RIs.

[0348] <Embodiment AO1> Considering that some CSI contents are common in mapping of multiple CSIs including multiple CRIs, Option 2-1 / 2-2 in embodiment AH2 may be based on at least one of the following options.

[0349] ◆ Variation 1 of Option 2-1: The CSI report may include, in order, content common to X CSIs, all remaining CRI-specific content for the first reported CRI, all remaining CRI-specific content for the second reported CRI, ..., all remaining CRI-specific content for the X reported CRI. For example, the CSI report may include, in order, one RI (common to X CRIs), the first CRI, other CRI-specific content for the first CRI, the second CRI, other CRI-specific content for the second CRI, ...

[0350] ◆ Variation 2 of Option 2-1: The CSI report may include all content for the first reported CRI (including content common to the X CSIs), all remaining CRI-specific content for the second reported CRI, ..., all remaining CRI-specific content for the X reported CRI. The content common to the X CSIs may appear only in the content for the first CRI and not in the content for the other CRIs. For example, the CSI report may include, in order, the first CRI, one RI (common to the X CSIs), the remaining content for the first CRI, the second CRI, the remaining content for the second CRI, ...

[0351] ◆ Variation 1 of Option 2-2: In a CSI report, content common to X CSIs may be arranged, followed by specific report content corresponding to multiple CRIs for each report content (report amount) in the order of the reported CRIs. The order of the report content may be the same as that of an existing CSI report. For example, a CSI report may include, in order, one RI (common to X CSIs), the first CRI, the second CRI, an LI for the first CRI, an LI for the second CRI, and so on.

[0352] ◆ Variation 2 of Option 2-2: In a CSI report, for each specific report content (specific report amount), report contents corresponding to multiple CRIs may be arranged in the order of the reported CRIs. The order of the report contents may be the same as in existing CSI reports. Then, between any two different report contents, content common to X CSIs may be arranged. For example, a CSI report may include, in order, a first CRI, a second CRI, one RI (common to X CRIs), an LI for the first CRI, an LI for the second CRI, ...

[0353] The CRI-specific reporting content may vary between different CSI mapping tables for different CSI parts or CSI of different widebands / subbands, and may follow existing specifications.

[0354] At least one of the tables for one CSI report on the PUCCH (e.g., tables C-7, C-9, C-10, and C-11 described above) may be extended by applying the mapping order of embodiment AO1.

[0355] At least one of the tables for one CSI report on PUSCH (e.g., tables S-3, S-4, and S-5 described above) may be extended by applying the mapping order of embodiment AO1.

[0356] An extension of embodiment AO1 considers an extension of Rel. 17 NCJT to arrange multiple CSIs, each with multiple CRIs, into one CSI report, and may introduce a new table for each case based on each existing table and define a new mapping order for various contents from multiple CSIs.

[0357] Consideration 2: The mapping order of multiple CSIs, each with multiple CRIs, based on embodiment AH / embodiment AO1 takes into account an extension of Rel. 17 NCJT. In Rel. 18 network energy saving (NWES), it is considered that multiple CSIs within one CSI report will be introduced. The multiple CSIs correspond to multiple CSI report subconfiguration IDs (CSI-ReportSubConfigIDs) within one CSI reporting configuration (CSI-ReportConfig). In particular, if there is no overhead reduction for multiple CSIs each with multiple CRIs, a specific CSI mapping order may be used for multiple CSIs each with multiple CRIs.

[0358] The method of embodiment AO1 can achieve a similar effect on the final mapping order of multiple CSIs. The difference between the method of embodiment AO1 and Rel. 18 NWES is whether the method affects the specifications or modifies existing specifications to achieve the effect, such as whether a new table is defined in the specifications or a method for reusing an existing table is added.

[0359] In Rel. 18 NWES, CSI omission rules for sub-reporting (corresponding to sub-configuration) are introduced, which can be applied to CSI omission for multiple CSIs each having multiple CRIs.

[0360] Unlike Rel. 17 NCJT, Rel. 18 NWES does not introduce new tables. It instead reuses existing tables (C-7, C-9, C-10, C-11, S-3, S-4, S-5, etc.). By applying each existing table to one CSI corresponding to a CSI-ReportSubConfigID, the mapping order within each CSI is defined. Rel. 18 NWES then defines the mapping order between multiple CSIs.

[0361] The existing specifications for Rel. 18 NWES define several procedures:

[0362] ◆CSI only (case where UCI is carried on PUCCH) -◆If csi-ReportSubConfig is set, in the corresponding CSI sub-report, the mapping order of one CSI sub-report is determined by replacing CSI report #n with CSI sub-report #n in the existing tables (C-7, C-9, and C-10) according to the following procedure, and by using only the table for determining the bit width of the CSI field. -◆N i sub For a CSI report #i (i∈{1, 2, ..., n}) containing CSI sub-reports, all CSI sub-reports in CSI report #i are mapped to corresponding segments of the UCI bit sequence of CSI report #i in ascending order of CSI sub-report numbers, from top to bottom of the segments: CSI sub-report #1, CSI sub-report #2, ..., CSI sub-report #N i sub corresponds to the CSI sub-reports in ascending order of CSI-ReportSubConfigID.

[0363] ◆CSI only (case where UCI is carried on PUSCH) -◆If csi-ReportSubConfig is set, in the corresponding CSI sub-report, the mapping order of one CSI sub-report is determined by replacing CSI report #n in the existing tables (S-3 and S-4) with CSI sub-report #n according to the following procedure, and by using only the table for determining the bit width of the CSI field. -◆N i sub For a CSI report #i (i∈{1, 2, ..., n}) containing CSI sub-reports, all CSI sub-reports in CSI report #i are mapped to corresponding segments of the UCI bit sequence of CSI report #i in ascending order of CSI sub-report numbers, from top to bottom of the segments: CSI sub-report #1, CSI sub-report #2, ..., CSI sub-report #N i sub corresponds to the CSI sub-reports in ascending order of CSI-ReportSubConfigID.

[0364] <Embodiment AO2> In the mapping order of CSI for each CRI of multiple CSIs each having multiple CRIs, CSI report #n in the existing table may be replaced with CSI corresponding to one CRI.

[0365] In the mapping order among multiple CSIs, each having multiple CRIs, the multiple CSIs may be mapped according to at least one of the following options: ◆ Option 1: An order determined / selected by the UE. The order may be from the smallest CRI to the largest CRI, or from the largest CRI to the smallest CRI. ◆ Option 2: An order determined / configured by the gNB / NW. The order may be the order of multiple CMRs (multiple entries) configured in the CSI-RS resource configuration. ◆ Option 3: An order based on a rule defined in the specification. The order may be to first configure the reference CSI in embodiment AN and then configure the remaining CSI (non-reference CSI), and the order of option 1 or 2 may be applied to the remaining CSI. In embodiment AN, the reference CSI may be a CSI having a 4-bit wideband CQI, and the non-reference CSI may be a CSI having a 2-bit differential wideband CQI.

[0366] According to embodiment AO2, the UE / gNB can appropriately determine the mapping order of multiple CSIs, each having multiple CRIs.

[0367] Consideration 3: Rel. 18 NWES allows CSI omission at a higher priority reporting level than that defined by Table S2-2-1 (Part 2 CSI Priority Reporting Level Table, Figure 17) of the existing specifications. The higher level is determined by the Sub-setting ID.

[0368] The existing specifications for Rel. 18 NWES define several procedures:

[0369] ◆ CSI reporting using PUSCH -◆ If a CSI report on PUSCH has two parts, the UE may omit some of the Part 2 CSI. The omission of Part 2 CSI follows the priority order shown in the Priority Reporting Level Table. -◆ When omitting Part 2 CSI information at a particular priority level, the UE omits all of the information at that priority level except when the corresponding CSI report includes one or more CSI sub-reports with Part 2. Each of the one or more CSI corresponds to a subset from the list of subsets provided by csi-ReportSubConfigList contained in CSI-ReportConfig. -◆ For a reporting setting for CSI-ReportConfig that includes a list of subsets provided by csi-ReportSubConfigList, in the corresponding CSI report n that includes one or more CSI sub-reports, the omission of Part 2 CSI is performed at a subset level within the same priority level defined by the Priority Reporting Level Table. Here, a sub-configuration with an index provided by csi-ReportSubConfigID with a lower value has a higher priority.

[0370] ◆ CSI reporting using PUCCH -◆ If a CSI report on PUCCH has two parts, the UE may omit some of the Part 2 CSI. The omission of Part 2 CSI follows the priority order shown in the Priority Reporting Level Table. -◆ When omitting Part 2 CSI information at a particular priority level, the UE omits all of the information at that priority level except when the corresponding CSI report includes one or more CSI sub-reports with Part 2. Each of the one or more CSI corresponds to a subset from the list of subsets provided by csi-ReportSubConfigList contained in CSI-ReportConfig. -◆ For a reporting setting for CSI-ReportConfig that includes the list of subsets provided by csi-ReportSubConfigList, in the corresponding CSI report n that includes one or more CSI sub-reports, the omission of Part 2 CSI is defined in the above-mentioned CSI reporting using PUSCH. Part 2 CSI is omitted from the lowest priority level until the coding rate of Part 2 CSI is equal to or less than the coding rate set by the upper layer parameter maxCodeRate.

[0371] <Embodiment AO3> In multiple CSIs each having multiple CRIs, the omission of Part 2 CSI may be based on at least one of several options:

[0372] ◆ Option 1: Omission of Part 2 CSI will reuse the existing priority levels defined in the Priority Reporting Level Table. No additional priority levels may be introduced.

[0373] ◆ Option 2: The omission of Part 2 CSI may support additional priority (omission) levels for information at the same priority level. The additional priority (omission) levels are determined based on several of the following options 2x for each CSI corresponding to a CRI. - ◆ Option 2a: The additional priority level is determined based on the CRI value. A smaller CRI value may have a higher priority level. A larger CRI value may have a higher priority level. - ◆ Option 2b: The additional priority level is determined based on the order of multiple CMRs (multiple entries) configured in the CSI-RS resource configuration. A CMR in an earlier entry may have a higher priority level. A CMR in a later entry may have a higher priority level. - ◆ Option 2c: The additional priority level is determined based on the mapping order of CSIs for each CRI. A CSI mapped earlier may have a higher priority level. A CSI mapped later may have a higher priority level. - ◆ Option 2d: The reference CSI in embodiment AN may have a higher priority level. The priority level for the remaining CSI (non-reference CSI) may be determined by options 2a / 2b / 2c.

[0374] ◆ Option 3: Omission of Part 2 CSI may support additional priority (omission) levels for information at the same priority level. The additional priority (omission) levels may have only two levels. The reference CSI in embodiment AN may have a higher priority level. The priority levels for the remaining CSI (non-reference CSI) may have the same or lower priority levels.

[0375] According to embodiment AO3, the UE / gNB can appropriately omit Part 2 CSI in multiple CSIs each having multiple CRIs.

[0376] ((Embodiment BL)) <Issue 1> The multi-CRI report of item 2c is being considered as an extended CB based on both Type 1 CB and Type 2 CB.

[0377] CSI extension based on CRI for up to 128 ports is considered based on the following several features: In Rel. 15 Type 1 SP CB, M is {1,...,min(4,K S )} is configured by the NW via higher layer (RRC) signaling. The maximum value of M depends on the UE capability. ◆ In Rel. 16 Extended Type 2CB, M=1 is supported. K S The maximum value of is {1, 2, 3, 4}, depending on the UE capability. Support for Rel. 16 Extended Type 2 CB is a separate UE capability from support for Extended CB based on at least both Type 1 and Type 2.

[0378] K S The algorithm for selecting a CRI from measurements of >1 NZP CSI-RS resource is UE implementation dependent.

[0379] In the CSI refinement based on CRI for up to 128 ports, if M>1, M PMIs are calculated and displayed / reported independently. S = {1,2,3,4}, M = 2 is supported with a maximum of 16 ports per resource, R = 1 only, and a maximum UCI payload of 1706 bits. The value of M = {1,2} is configured by the NW via higher layer (RRC) signaling. The maximum value of M depends on the UE capabilities. S For >1 NZP CSI-RS resource, the existing IMR rules for Rel. 15 CRI-based reporting for NZP CSI-RS resources for interference measurement are repurposed, i.e., only one NZP CSI-RS resource is configured for interference measurement.

[0380] As mentioned above, the following CSI reporting methods are considered: ◆ Extended CB based on Type 1 CB with M set by the NW is supported. M is the number of CRIs reported by the UE. M can be up to 4. ◆ Extended CB based on Type 2 CB with M=1 for multi-CRI reporting is supported. Here, the following constraints apply: - ◆ K Sis less than or equal to 4. ◆ Extended CB based on Type 2 CB with M=2 for multi-CRI reporting is supported, with some restrictions: - ◆ K S -◆The maximum number of ports per resource is 16. -◆R can only be 1. ◆In a CSI report of M CSIs (corresponding to M CRIs), M PMIs are calculated and displayed / reported independently for each CMR.

[0381] Embodiments AH and AO mainly describe two policies for CSI mapping order and CSI omission rules. However, in the subband part of CSI Part 2 in the subband CSI on the PUCCH / PUSCH, not only the order of different CSI contents for each CRI but also the order of even-indexed (0, 2, ..., even numbers) subbands and odd-indexed (1, 3, ..., odd numbers) subbands for each CRI are not fully considered.

[0382] The mapping order of multiple CSI fields in the wideband CSI, CSI part 1 of the subband CSI, the wideband part of CSI part 2 of the subband CSI, and the subband part of CSI part 2 of the subband CSI on the PUCCH / PUSCH may be such that the order of CRI takes precedence as in the example of Table E-1 (FIG. 18), or such that the order of CSI content takes precedence as in the example of Table E-2 (FIG. 19).

[0383] Details of CSI content 1, 2, 3, ... for each CRI in at least one of Type 1 / 2 CB, wideband CSI, CSI part 1 of subband CSI, wideband part of CSI part 2 of subband CSI, and subband part of CSI part 2 of subband CSI may follow existing specifications.

[0384] If there is specific CSI content common to multiple CRIs, embodiment AO1 may be applied.

[0385] <Embodiment BL1> This embodiment relates to the mapping order of CSI fields.

[0386] The mapping order of even-indexed and odd-indexed subbands per CRI may be based on any of several options:

[0387] ◆Option 1: First, one or more CSI contents of all even-indexed subbands for multiple CRIs (first reported CRI, second reported CRI, ...) are mapped / arranged, and then one or more CSI contents of all odd-indexed subbands for multiple CRIs (first reported CRI, second reported CRI, ...) are mapped / arranged (e.g., Table P-1 in Figure 20).

[0388] ◆Option 2: First, one or more CSI contents of all even-indexed subbands for the first reported CRI are mapped / arranged, then one or more CSI contents of all odd-indexed subbands for the first reported CRI are mapped / arranged, then one or more CSI contents of all even-indexed subbands for the second reported CRI are mapped / arranged, then one or more CSI contents of all odd-indexed subbands for the second reported CRI are mapped / arranged, and so on, with the CSI contents being arranged according to similar rules (e.g., Table P-2 in Figure 21).

[0389] ◆ Option 3: First, CSI content 1 of all even-indexed subbands for multiple CRIs (first reported CRI, second reported CRI, ...) is mapped / arranged, then CSI content 2 of all even-indexed subbands for multiple CRIs (first reported CRI, second reported CRI, ...) is mapped / arranged, then CSI content 1 of all even-indexed subbands for multiple CRIs (first reported CRI, second reported CRI, ...) is mapped / arranged, and so on, following the same rule. Therefore, the CSI content is arranged, then CSI content 1 of all odd-indexed subbands for multiple CRIs (first reported CRI, second reported CRI, ...) is mapped / arranged, and so on, arranged according to similar rules, then CSI content 2 of all odd-indexed subbands for multiple CRIs (first reported CRI, second reported CRI, ...) is mapped / arranged, and so on, arranged according to similar rules, and so on, CSI content is arranged according to similar rules (e.g., Table P-3 in Figure 22).

[0390] Details of CSI content 1, 2, 3, ... for each CRI in at least one of Type 1 / 2 CB, wideband CSI, CSI part 1 of subband CSI, wideband part of CSI part 2 of subband CSI, and subband part of CSI part 2 of subband CSI may follow existing specifications.

[0391] If there is specific CSI content common to multiple CRIs, embodiment AO1 may be applied.

[0392] <Issue 2> In the CSI refinement based on CRI for up to 128 CSI-RS ports, for M>1, (each CRI is ceil(log2K S It is contemplated that M CRIs (each having K bits) are separately indicated / reported. S M of the CSI-RS resources RIt is supported that the NW configures / requests the UE to report the CRI / RI / PMI / CQI associated with (<M) or the number of hypotheses is reduced, i.e., (each CRI is ceil(log2(K S -M R )) bit) (MM R ) Whether reporting of CRIs is supported has not been fully considered.

[0393] The following proposals are being considered: * In CSI based CSI refinement for up to 128 CSI-RS ports, in A-CSI only, the NW selects K quads selected as part of the report of M sets (M quadruplets). S M of the CSI-RS resources R (<M) can be set. One set may be CQI, PMI, RI, and (if applicable) LI. (Each CRI is ceil(log2(K S -M R )) bit) (MM R ) CRIs are reported along with M sets of CQI / PMI / RI / LI (if applicable). R The value of M is set by the NW via higher layer (RRC) signaling. R The selected resources are configured by the NW via higher layer (RRC) signaling. R The selected resources can be updated via DCI (as part of the CSI trigger condition).

[0394] If this proposal is adopted, M R Preferably, multiple CSIs of a CSI-RS resource are always selected / reported by the UE.

[0395] Although embodiment AO describes how the first reported CRI, the second reported CRI, ..., are determined, M R The additional factor of CSI-RS resources is not taken into account.

[0396] <Embodiment BL2> In the CSI mapping order (the mapping order of the CSI fields), the CRI to be reported first, the CRI to be reported second, the CRI to be reported third, ... are determined in accordance with the factors in embodiment AO, and in addition, M R The CSI-RS resources are the M R 18 NWES rules in embodiment AO are applied. R There may be M CSI sub-reports. R The CRI may be based on any of several options:

[0397] ◆Option 1: Reported M R The CRI index of this CRI is not explicitly reported by the UE. Only other CSI content may be reported by the UE. R When determining the order within the CSI-RS resource configuration, the order may be determined based on a rule. The rule may be based on at least one of the following options: Option 1-1: M in the CSI-RS resource configuration R Order of configured CMR of CSI-RS resources. - Option 1-2: M R The order of the CSI-RS resource indexes (IDs) of the CSI-RS resources. For example, from lowest index to highest index, or from highest index to lowest index. - The gNB and UE may have a common understanding that the configured CMR corresponds to the first reported CRI, the second reported CRI, etc.

[0398] ◆Option 2: Reported M R The CRI indexes of the reported CRIs are not explicitly reported by the UE. RWhen determining the order within a CRI, the order may be determined based on a rule. The rule may be the above-mentioned Option 1-1 / 1-2, may be based on embodiment AO, or may depend on the UE implementation. If the CRI index is reported explicitly, the order can be determined by the UE implementation, and proper operation is possible even without an order determination rule.

[0399] The "specific UE capability" described below may indicate at least one of the following capabilities: ◆ Supporting free selection / reporting of M CRIs ◆ Supporting some CRIs to be configured by the NW, which will always be included in the CSI report ◆ M, M R , M.M. R , at least one value of.

[0400] ((Embodiment BM)) <Issues> For four types of tables (wideband CSI, CSI Part 1 for subband CSI, CSI Part 2 wideband for subband CSI, CSI Part 2 subband for subband CSI), embodiment AH extends the existing CSI content in each table to M sets for M CSIs in a multi-CRI report.

[0401] For example, in the example of Option 2-2 of embodiment AH2, the contents of CSI Part 1 (CRI / RI / wideband CQI / subband CQI / ...) are divided into M sets, and each set corresponds to one CRI.

[0402] However, considering the overhead of CSI Part 1 and the higher priority of CSI Part 1 over CSI Part 2, it may be beneficial to place some less important content in CSI Part 2.

[0403] A new division between CSI Part 1 and CSI Part 2 for the X CSI contents is considered.

[0404] NW is K S M of the CSI-RS resources RThe division between CSI Part 1 and CSI Part 2 may be different depending on whether or not the UE is configured / requested to report CRI / RI / PMI / CQI associated with (<M) CSI-RS resources. R The division between CSI Part 1 and CSI Part 2 may be different with and without embodiment AH2 regarding whether the CRI indexes of the (<M) CRIs are explicitly reported.

[0405] As described in point 2 of embodiment BL, in the CRI-based CSI refinement for up to 128 CSI-RS ports, for M>1, (each CRI is ceil(log2K S It is contemplated that M CRIs (each having K bits) are separately indicated / reported. S M of the CSI-RS resources R It is supported that the NW configures / requests the UE to report the CRI / RI / PMI / CQI associated with (<M) or the number of hypotheses is reduced, i.e., (each CRI is ceil(log2(K S -M R )) bit) (MM R ) Whether reporting of CRIs is supported has not been fully considered.

[0406] The mapping order in embodiment AH may be extended to accommodate new division content in CSI Part 1 and CSI Part 2.

[0407] <Legacy CSI Content in Type 1 CB> In Type 1 single panel CB, CSI Part 1 and CSI Part 2 are based on the following several features. ◆ Legacy CSI Part 1 includes CRI, RI, wideband (WB) CQI for the first TB, and subband (SB) differential CQI for the first TB. The mapping order of each CSI field follows Table C-9 above. ◆ Legacy CSI Part 2 Wideband includes wideband CQI for the second TB, LI, wideband PMI information field X1, and wideband PMI information field X2. The mapping order of each CSI field follows Table C-10 above. The legacy CSI Part 2 subbands include subband differential CQIs for the second TBs of all even-indexed subbands, subband PMI information field X2 for the second TBs of all even-indexed subbands, subband differential CQIs for the second TBs of all odd-indexed subbands, and subband PMI information field X2 for the second TBs of all odd-indexed subbands. The mapping order of each CSI field follows Table C-11 described above.

[0408] <Legacy CSI Content in Extended Type 2 CB> In Extended Type 2 CB, CSI Part 1 and CSI Part 2 are based on the following several features. ◆ Legacy CSI Part 1 includes CRI, RI, wideband (WB) CQI for the first TB, subband (SB) differential CQI for the first TB, and an indicator of non-zero coefficient transmission. The mapping order of each CSI field follows Table S-9 above. ◆ Legacy CSI Part 2 includes PMI for Group 0, PMI for Group 1, and PMI for Group 2, as described in the "Extended Type 2 Codebook" above. The mapping order of each CSI field follows the priority reporting level table (Table S2-2-1) above and the table (Table S2-5A) showing the mapping order of multiple CSI fields in CSI Part 2 of one CSI report of Extended Type 2 or Extended Type 2 PS CB in Figure 23. Omission of Part 2 CSI follows the priority order in Table S2-2-1.

[0409] <Embodiment BM1> (Rel. 15) For multi-CRI reporting based on Type 1 single panel CB, when reporting of M CRIs is configured, the CSI field (UCI content) / mapping order may be based on one of the following options:

[0410] <<Option 1>> Multi-CRI reporting may be based on the contents / mapping order of multiple CSI fields in embodiment AH / embodiment AN. Multi-CRI reporting may be based on the contents / mapping order of the following multiple CSI fields. ◆ CSI Part 1 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆ M sets of CRI ◆ M sets of RI ◆ M sets of WB CQI for the 1st TB ◆ M sets of SB CQI for the 1st TB ◆ CSI Part 2 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆ M sets of WB CQI for the 2nd TB ◆ M sets of SB CQI for the 2nd TB ◆ M sets of LI ◆ M sets of WB PMI ◆ M sets of SB PMI

[0411] When UCI omission occurs, PMI in some CSI (fields) in CSI Part 2 may be dropped / omitted. CQI in CSI Part 1 for that CSI, especially SB CQI, becomes useless. Therefore, it is not efficient to place that CQI in CSI Part 1.

[0412] <<Option 2>> The M sets of SB CQI may be divided into CSI Part 1 and CSI Part 2. x1=1 may be set. x2=1 may be set.

[0413] Multi-CRI reporting may be based on the content / mapping order of the following multiple CSI fields: ◆ CSI Part 1 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆ M sets of CRI ◆ M sets of RI ◆ M sets of WB CQI for the 1st TB ◆ x1 set of SB CQI for the 1st TB ◆ CSI Part 2 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆ (M-x1) sets of SB CQI for the 1st TB ◆ M sets of WB CQI for the 2nd TB ◆ M sets of SB CQI for the 2nd TB ◆ M sets of LI ◆ M sets of WB PMI ◆ M sets of SB PMI

[0414] <<<Option 2 Variation 1>>> Multi-CRI reporting may be based on the contents / mapping order of the following multiple CSI fields. ◆ CSI Part 1 may include several of the following CSI fields. The CSI fields may be in the following order, or in another order: ◆ M sets of CRI ◆ M sets of RI ◆ M sets of WB CQIs for the 1st TB ◆ x1 set of SB CQIs for the 1st TB ◆ M sets of WB CQIs for the 2nd TB ◆ x2 sets of SB CQIs for the 2nd TB ◆ CSI Part 2 may include several of the following CSI fields. The CSI fields may be in the following order, or in another order: ◆ M sets of CRI ◆ M sets of RI ◆ M sets of WB CQIs for the 1st TB ◆ x1 set of SB CQIs for the 1st TB ◆ M sets of WB CQIs for the 2nd TB ◆ x2 sets of SB CQIs for the 2nd TB ◆(M-x1) sets of SB CQI for the first TB ◆(M-x2) sets of SB CQI for the second TB ◆M sets of LI ◆M sets of WB PMI ◆M sets of SB PMI

[0415] <<<Option 2 Variation 2>>> Multi-CRI reporting may be based on the content / mapping order of the following multiple CSI fields. ◆ CSI Part 1 may include several of the following CSI fields. The CSI fields may be in the following order, or in another order: ◆ M sets of CRI ◆ M sets of RI ◆ M sets of WB CQI for the 1st TB ◆ M sets of SB CQI for the 1st TB ◆ M sets of WB CQI for the 2nd TB ◆ x2 sets of SB CQI for the 2nd TB ◆ CSI Part 2 may include several of the following CSI fields. The CSI fields may be in the following order, or in another order: ◆ (M-x2) sets of SB CQI for the 2nd TB ◆ M sets of LI ◆ M sets of WB PMI ◆ M sets of SB PMI

[0416] <<<CRIs Corresponding to CSI Fields in CSI Part 1>>> One or more CRIs corresponding to at least one of the x1 sets of SB CQIs for the first TB and the x2 sets of SB CQIs for the second TB may be one of several options: ◆ Option 0: Reference CRI in embodiment AN (CRI corresponding to the reference CSI). ◆ Option 1: (Based on the order of the M CRIs in CSI Part 1) The first reported CRI (or the first x1 or first x2) of the M CRIs in CSI Part 1. ◆ Option 2: The lowest CRI (or the lowest x1 or lowest x2) of the M CRIs in CSI Part 1. ◆Option 3: (Based on the order of multiple CMRs in the CMR setting) CRI corresponding to the first (or the first x1, or the first x2) CMRs among multiple CMRs in the CMR setting (CSI-RS resource set for channel measurement).

[0417] <<Option 3>> The M sets of WB CQIs and the M sets of SB CQIs may be divided into CSI Part 1 and CSI Part 2. x1 may be 1. x2 may be 1. y1 may be 1. y2 may be 1.

[0418] Multi-CRI reporting may be based on the content / mapping order of the following multiple CSI fields: ◆ CSI Part 1 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆ M sets of CRI ◆ M sets of RI ◆ y1 sets of WB CQI for the 1st TB ◆ x1 set of SB CQI for the 1st TB ◆ CSI Part 2 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆ (M-y1) sets of WB CQI for the 1st TB ◆ (M-x1) sets of SB CQI for the 1st TB ◆ M sets of WB CQI for the 2nd TB ◆ M sets of SB CQI for the 2nd TB ◆ M sets of LI ◆ M sets of WB PMI ◆ M sets of SB PMI

[0419] <<<Option 3 Variation 1>>> Multi-CRI reporting may be based on the contents / mapping order of the following multiple CSI fields. ◆ CSI Part 1 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆ M sets of CRI ◆ M sets of RI ◆ y1 sets of WB CQI for the 1st TB ◆ x1 set of SB CQI for the 1st TB ◆ y2 sets of WB CQI for the 2nd TB ◆ x2 sets of SB CQI for the 2nd TB ◆ CSI Part 2 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆ M sets of CRI ◆ M sets of RI ◆ y1 sets of WB CQI for the 1st TB ◆ x1 set of SB CQI for the 1st TB ◆ y2 sets of WB CQI for the 2nd TB ◆ x2 sets of SB CQI for the 2nd TB ◆(M-y1) sets of WB CQI for the first TB ◆(M-x1) sets of SB CQI for the first TB ◆(M-y2) sets of WB CQI for the second TB ◆(M-x2) sets of SB CQI for the second TB ◆M sets of LI ◆M sets of WB PMI ◆M sets of SB PMI

[0420] <<<Option 3 Variation 2>>> Multi-CRI reporting may be based on the contents / mapping order of the following multiple CSI fields. ◆ CSI Part 1 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆ M sets of CRI ◆ M sets of RI ◆ M sets of WB CQI for the 1st TB ◆ M sets of SB CQI for the 1st TB ◆ y2 sets of WB CQI for the 2nd TB ◆ x2 sets of SB CQI for the 2nd TB ◆ CSI Part 2 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆ M sets of CRI ◆ M sets of RI ◆ M sets of WB CQI for the 1st TB ◆ M sets of SB CQI for the 1st TB ◆ y2 sets of WB CQI for the 2nd TB ◆ x2 sets of SB CQI for the 2nd TB ◆(M-y2) sets of WB CQI for the second TB ◆(M-x2) sets of SB CQI for the second TB ◆M sets of LI ◆M sets of WB PMI ◆M sets of SB PMI

[0421] <<<CRIs Corresponding to CSI Fields in CSI Part 1>>> The CRI corresponding to the y1 sets of WB CQIs for the first TB may be the same as the CRI corresponding to the x1 set of SB CQIs for the first TB. The CRI corresponding to the y2 sets of WB CQIs for the second TB may be the same as the CRI corresponding to the x2 sets of SB CQIs for the second TB. One or more CRIs corresponding to at least one of the x1 set of SB CQIs for the first TB and the x2 sets of SB CQIs for the second TB may be choices 0 / 1 / 2 / 3 of Option 2.

[0422] <<Option 4>> The M sets of CRI, the M sets of RI, the M sets of CQI, and the M sets of SB CQI may be divided into CSI Part 1 and CSI Part 2. x1 may be 1. x2 may be 1. y1 may be 1. y2 may be 1. z may be 1.

[0423] Multi-CRI reporting may be based on the content / mapping order of the following multiple CSI fields: ◆ CSI Part 1 may include the following several CSI fields. The CSI fields may be in the following order, or in some other order: ◆ z sets of CRI ◆ z sets of RI ◆ y1 sets of WB CQIs for the 1st TB ◆ x1 sets of SB CQIs for the 1st TB ◆ CSI Part 2 may include the following several CSI fields. The CSI fields may be in the following order, or in some other order: ◆ z sets of CRI ◆ z sets of RI ◆ y1 sets of WB CQIs for the 1st TB ◆ x1 sets of SB CQIs for the 1st TB ◆(Mz) sets of CRI ◆(Mz) sets of RI ◆(M-y1) sets of WB CQI for the 1st TB ◆(M-x1) sets of SB CQI for the 1st TB ◆M sets of WB CQI for the 2nd TB ◆M sets of SB CQI for the 2nd TB ◆M sets of LI ◆M sets of WB PMI ◆M sets of SB PMI

[0424] <<<Option 4 Variation 1>>> Multi-CRI reporting may be based on the contents / mapping order of the following multiple CSI fields. ◆ CSI Part 1 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆ z sets of CRI ◆ z sets of RI ◆ y1 sets of WB CQIs for the 1st TB ◆ x1 set of SB CQIs for the 1st TB ◆ y2 sets of WB CQIs for the 2nd TB ◆ x2 sets of SB CQIs for the 2nd TB ◆ CSI Part 2 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆ z sets of CRI ◆ z sets of RI ◆ y1 sets of WB CQIs for the 1st TB ◆ x1 set of SB CQIs for the 1st TB ◆ y2 sets of WB CQIs for the 2nd TB ◆ x2 sets of SB CQIs for the 2nd TB ◆(Mz) sets of CRI ◆(Mz) sets of RI ◆(M-y1) sets of WB CQI for the 1st TB ◆(M-x1) sets of SB CQI for the 1st TB ◆(M-y2) sets of WB CQI for the 2nd TB ◆(M-x2) sets of SB CQI for the 2nd TB ◆M sets of LI ◆M sets of WB PMI ◆M sets of SB PMI

[0425] <<<Variation 2 of Option 4>>> The multi-CRI report may be based on the content / mapping order of the following multiple CSI fields. ◆ CSI part 1 may include several of the following CSI fields. These CSI fields may be in the following order or in another order. ◆ z sets of CRI ◆ z sets of RI ◆ M sets of WB CQI for the first TB ◆ M sets of SB CQI for the first TB ◆ y2 sets of WB CQI for the second TB ◆ x2 sets of SB CQI for the second TB ◆ CSI part 2 may include several of the following CSI fields. These CSI fields may be in the following order or in another order. ◆ (M - z) sets of CRI ◆ (M - z) sets of RI ◆ (M - y2) sets of WB CQI for the second TB ◆ (M - x2) sets of SB CQI for the second TB ◆ M sets of LI ◆ M sets of WB PMI ◆ M sets of SB PMI

[0426] <<Variation>> For at least one of x1, x2, y1, y2, z, values different from the aforementioned values (x1 = 1, x2 = 1, y1 = 1, y2 = 1, z = 1) may be supported. For example, at least one of x1 = 0, x2 = 0, 1 < x1 < M, 1 < x2 < M, 1 < y1 < M, 1 < y2 < M, 1 < z < M may be supported.

[0427] By using the following updates, embodiment AH may be applied to the mapping order of new CSI Part 1 and new CSI Part 2 of Options 2 / 3 / 4: ◆ In CSI Part 1, some contents may be deleted from the mapping order (table) of X CSI / sets. ◆ In CSI Part 2, some new CSI fields / contents may be added to the mapping order (table). The new CSI fields / contents may be added to any position in the mapping order for M sets of WB CQIs for the second TB, M sets of SB CQIs for the second TB, M sets of LIs, M sets of WB PMIs, and M sets of SB PMIs.

[0428] By applying Option 2-1 of embodiment AH2 to the mapping order of new CSI Part 1 and new CSI Part 2, multiple CSI fields corresponding to the same CRI and multiple CSI contents may be mapped contiguously. Figure 24 shows an example of the mapping order of CSI Part 1 of Option 2 of embodiment BM1 based on Option 2-1 of embodiment AH2. In this example, CSI Part 1 includes the 1st to Mth CSI fields for the CRI, RI, and wideband CQI for the first TB, and the 1st to x1th CSI fields for the subband CQI for the first TB. Figure 25 shows an example of the mapping order of CSI Part 2 of Option 2 of embodiment BM1 based on Option 2-1 of embodiment AH2. In this example, CSI part 2 includes the 1st through Mth CSI fields for the wideband CQI for the second TB, the subband CQI for the second TB, the LI, the wideband PMI, and the subband PMI, and the (x1-+1)th through Mth CSI fields for the subband CQI for the first TB.

[0429] By applying Option 2-2 of embodiment AH2 to the mapping order of new CSI Part 1 and new CSI Part 2, multiple CSI fields corresponding to the same CSI content and multiple CRIs (M, x1, or (M-x1) CRIs) may be mapped contiguously. Figure 26 shows an example of the mapping order of CSI Part 1 of Option 2 of embodiment BM1 based on Option 2-2 of embodiment AH2. In this example, CSI Part 1 includes 1st to Mth CSI fields for the CRI, RI, and wideband CQI for the first TB, and 1st to x1th CSI fields for the subband CQI for the first TB. Figure 27 shows an example of the mapping order of CSI Part 2 of Option 2 of embodiment BM1 based on Option 2-2 of embodiment AH2. In this example, CSI part 2 includes the 1st through Mth CSI fields for the wideband CQI for the second TB, the subband CQI for the second TB, the LI, the wideband PMI, and the subband PMI, and the (x1-+1)th through Mth CSI fields for the subband CQI for the first TB.

[0430] According to embodiment BM1, in multi-CRI reporting based on Type 1 single-panel CB, multiple CSI fields corresponding to M CRIs can be appropriately mapped to CSI Part 1 and CSI Part 2. CSI fields with higher priority can be mapped to CSI Part 1. Also, overhead of CSI Part 1 can be reduced.

[0431] <Embodiment BM2> (Rel. 15) For multi-CRI reporting based on Type 1 single panel CB, reporting of M CRIs is configured, and K S M of the CSI-RS resources R If the NW indicates / configures that (<M) CSI-RS resources are (always) reported, in addition to one of the options of embodiment BM1, one of the following options may be applied:

[0432] <<Option 5>> The M sets of WB CQIs for the 1st TB (and the 2nd TB) and the M sets of SB CQIs for the 1st TB (and the 2nd TB) may be split into CSI Part 1 and CSI Part 2. x1=1 or M R x2=1 or M R y1=1 or M R y2=1 or M R may be.

[0433] Multi-CRI reporting may be based on the content / mapping order of multiple CSI fields in Option 3, or Option 3 Variation 1, or Option 3 Variation 2.

[0434] <<<<CRI corresponding to the CSI field in CSI Part 1>>> y1=M R or x1=M R If x1 sets of SB CQIs for the first TB and y1 sets of WB CQIs for the first TB are M R It may correspond to a CMR.

[0435] y2=M R or x2=M R If x2 sets of SB CQIs for the second TB and y2 sets of WB CQIs for the second TB are M R It may correspond to a CMR.

[0436] One or more CRIs corresponding to at least one of the x1 sets of SB CQIs for the first TB, the y1 sets of WB CQIs for the first TB, the x2 sets of SB CQIs for the second TB, and the y2 sets of WB CQIs for the second TB may be options 0 / 1 / 2 / 3 of option 2 of embodiment BM1, or one of the following options: ◆ Option 4: M in CSI Part 1 RThe first reported CRI of the CRIs (or the first x1, or the first x2, or the first y1, or the first y2). ◆Option 5: M (in CSI Part 1) R The lowest (or the lowest x1, or the lowest x2, or the lowest y1, or the lowest y2) CRI among the CRIs. ◆ Option 6: (The M R Based on the order of CMRs, R CRI corresponding to the first (or the first x1, or the first x2, or the first y1, or the first y2) CMR among the CMRs.

[0437] <<Option 6>> The M sets of CRI, the M sets of RI, the M sets of WB CQI, and the M sets of SB CQI may be divided into CSI Part 1 and CSI Part 2. x1=1 or M R x2=1 or M R y1=1 or M R y2=1 or M R z=1 or M R may be.

[0438] Multi-CRI reporting may be based on the content / mapping order of multiple CSI fields in Option 4, or Option 4 Variation 1, or Option 4 Variation 2.

[0439] M indicated by NW R This CSI-RS resource has high priority.

[0440] Based on embodiment BL2, M of CRI R This set may not be explicitly reported by the UE.

[0441] According to embodiment BM2, in multi-CRI reporting based on Type 1 single panel CB, all or part of multiple CSI fields corresponding to M CRIs can be appropriately mapped to CSI Part 1 and CSI Part 2. CSI fields with high priority can be mapped to CSI Part 1 while suppressing the overhead of CSI Part 1. R This CSI field can be given high priority.

[0442] <Embodiment BM3> (Rel. 16) For multi-CRI reporting based on extended type 2CB, when reporting of M=2 CRIs is configured, the CSI field (UCI content) / mapping order may be based on one of the following options:

[0443] <<Option A>> Multi-CRI reporting may be based on the content / mapping order of multiple CSI fields in embodiment AH / embodiment AN and the content / mapping order of multiple CSI fields in Group 0 to Group 2 in the existing specifications. Multi-CRI reporting may be based on the content / mapping order of the following multiple CSI fields. ◆ CSI Part 1 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆ M sets of CRI ◆ M sets of RI ◆ M sets of WB CQI for the 1st TB ◆ M sets of SB CQI for the 1st TB ◆ M sets of (indicators of) total number of NZC ◆ CSI Part 2 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆ M sets of content in Group 0 ◆ M sets of content in Group 1 ◆ M sets of content in Group 2

[0444] In this disclosure, the contents in Group 0 are PMI(i 1,1 and i 1,2 and i 1,8,l(l=1,...,v)) and / or WB CQI for the second TB. In this disclosure, the content in Group 1 may be PMI(i 1,5 and i 1,6,l and i 1,7,l v2LM from the highest priority (top priority) v Q-floor(K NZ / 2) elements and i 2,3,l and i 2,4,l From the highest priority (higher priority) max(0,ceil(K NZ / 2)-v) elements and i 2,5,l From the highest priority (higher priority) max(0,ceil(K NZ / 2)-v) elements and (if reported) i 1,10,l ) and SB CQI of even index subbands for the second TB. In this disclosure, the content in Group 2 may be PMI(i 1,7,l From the lowest priority (lower priority) floor(K NZ / 2) elements and i 2,4,l min(K NZ -v,floor(K NZ / 2)) elements and i 2,5,l min(K NZ -v,floor(K NZ / 2)) elements) and / or SB CQI of odd-indexed subbands for the second TB.

[0445] <<Option B>> Multi-CRI reporting may be based on the content / mapping order of the following multiple CSI fields. x1=1 may be used. w=1 may be used. ◆CSI Part 1 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆M sets of CRI ◆M sets of RI ◆M sets of WB CQI for the 1st TB ◆x1 set of SB CQI for the 1st TB ◆M sets of (indicators of) total number of NZCs ◆CSI Part 2 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆(M-x1) sets of SB CQI for the 1st TB ◆M sets of content in Group 0 ◆M sets of content in Group 1 ◆M sets of content in Group 2

[0446] <<<Option B Variation 1>>> Multi-CRI reporting may be based on the content / mapping order of the following multiple CSI fields. ◆ CSI Part 1 may include several of the following CSI fields. The CSI fields may be in the following order, or in some other order: ◆ M sets of CRI ◆ M sets of RI ◆ M sets of WB CQI for the 1st TB ◆ x1 sets of SB CQI for the 1st TB ◆ M sets of (indicators of) total number of NZC ◆ w sets of content in Group 0 ◆ w sets of content in Group 1 ◆ w sets of content in Group 2 ◆ CSI Part 2 may include several of the following CSI fields. The CSI fields may be in the following order, or in some other order: ◆ M sets of CRI ◆ M sets of RI ◆ M sets of WB CQI for the 1st TB ◆ x1 sets of SB CQI for the 1st TB ◆ M sets of (indicators of) total number of NZC ◆ w sets of content in Group 0 ◆ w sets of content in Group 1 ◆ w sets of content in Group 2 ◆(M-x1) sets of SB CQI for the first TB ◆(Mw) sets of content in group 0 ◆(Mw) sets of content in group 1 ◆(Mw) sets of content in group 2

[0447] <<<Option B Variation 2>>> Multi-CRI reporting may be based on the content / mapping order of the following multiple CSI fields. ◆ CSI Part 1 may include several of the following CSI fields. The CSI fields may be in the following order, or in another order: ◆ M sets of CRI ◆ M sets of RI ◆ M sets of WB CQI for the 1st TB ◆ M sets of SB CQI for the 1st TB ◆ M sets of (indicators of) total number of NZC ◆ w sets of content in Group 0 ◆ w sets of content in Group 1 ◆ w sets of content in Group 2 ◆ CSI Part 2 may include several of the following CSI fields. The CSI fields may be in the following order, or in another order: ◆ (Mw) sets of content in Group 0 ◆ (Mw) sets of content in Group 1 ◆ (Mw) sets of content in Group 2

[0448] <<<CRIs Corresponding to CSI Fields in CSI Part 1>>> One or more CRIs corresponding to at least one of the x1 sets of SB CQIs for the first TB and the w sets of contents in groups 0 / 1 / 2 may be options 1 / 2 / 3 / 4 of option 2 of embodiment BM1. x1 in options 1 / 2 / 3 / 4 of option 2 of embodiment BM1 may be replaced with w.

[0449] <<Option C>> Multi-CRI reporting may be based on the contents / mapping order of the following multiple CSI fields. May be x1=1. May be y1=1. May be w=1. May be w1=1. ◆CSI Part 1 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆M sets of CRI ◆M sets of RI ◆y1 sets of WB CQI for the 1st TB ◆x1 set of SB CQI for the 1st TB ◆M sets of (indicators of) total number of NZC ◆CSI Part 2 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆M sets of CRI ◆M sets of RI ◆y1 sets of WB CQI for the 1st TB ◆x1 set of SB CQI for the 1st TB ◆M sets of (indicators of) total number of NZC ◆CSI Part 2 may include the following several CSI fields. The CSI fields may be in the following order, or in another order: ◆(M-y1) sets of WB CQI for the first TB ◆(M-x1) sets of SB CQI for the first TB ◆M sets of content in group 0 ◆M sets of content in group 1 ◆M sets of content in group 2

[0450] <<<Option C Variation 1>>> Multi-CRI reporting may be based on the content / mapping order of the following multiple CSI fields. ◆ CSI Part 1 may include the following CSI fields. The CSI fields may be in the following order, or in some other order: ◆ M sets of CRI ◆ M sets of RI ◆ y1 sets of WB CQI for the 1st TB ◆ x1 sets of SB CQI for the 1st TB ◆ M sets of (indicators of) total number of NZC ◆ w sets of content in Group 0 ◆ w sets of content in Group 1 ◆ w sets of content in Group 2 ◆ CSI Part 2 may include the following CSI fields. The CSI fields may be in the following order, or in some other order: ◆ M sets of CRI ◆ M sets of RI ◆ y1 sets of WB CQI for the 1st TB ◆ x1 sets of SB CQI for the 1st TB ◆ M sets of (indicators of) total number of NZC ◆ w sets of content in Group 0 ◆ w sets of content in Group 1 ◆ w sets of content in Group 2 ◆(M-y1) sets of WB CQI for the first TB ◆(M-x1) sets of SB CQI for the first TB ◆(Mw) sets of content in group 0 ◆(Mw) sets of content in group 1 ◆(Mw) sets of content in group 2

[0451] <<<Variation 2 of Option C>>> The multi-CRI report may be based on the content / mapping order of the following multiple CSI fields. ◆ CSI part 1 may include several of the following CSI fields. These CSI fields may be in the following order or in other orders. ◆ M sets of CRI ◆ M sets of RI ◆ y1 sets of WB CQI for the first TB ◆ x1 sets of SB CQI for the first TB ◆ M sets of the total number (indicator) of NZC ◆ w1 sets of content within group 0 ◆ CSI part 2 may include several of the following CSI fields. These CSI fields may be in the following order or in other orders. ◆ (M-y1) sets of WB CQI for the first TB ◆ (M-x1) sets of SB CQI for the first TB ◆ (M-w1) sets of content within group 0 ◆ M sets of content within group 1 ◆ M sets of content within group 2

[0452] <<<CRI corresponding to the CSI fields within CSI part 1>>> One or more CRIs corresponding to at least one set of x1 sets of SB CQI for the first TB, y1 sets of WB CQI for the first TB, w sets of content within groups 0 / 1 / 2, and w1 sets of content within group 0 may be Option 0 / 1 / 2 / 3 of Option 2 of Embodiment BM1. In Option 0 / 1 / 2 / 3 of Option 2 of Embodiment BM1, x1 may be read as at least one of y1, w, and w1.

[0453] <<Variation>> Values different from the aforementioned values (x1 = 1, y1 = 1, w = 1, w1 = 1) may be supported for at least one of x1, y1, w, and w1. For example, at least one of x1 = 0, y1 = 0, w = 0, w1 = 0, 1 < x1 < M, 1 < y1 < M, 1 < w < M, 1 < w1 < M may be supported.

[0454] By using the following updates, embodiment AH may be applied to the mapping order of new CSI Part 1 and new CSI Part 2 of Option B / C: ◆ In CSI Part 1, some CSI fields / contents may be deleted from the mapping order (table) of X CSI / sets. ◆ In CSI Part 2, some new CSI fields / contents may be added to the mapping order (table). The new CSI fields / contents may be added within Group 0 / 1 / 2 or within a new group. The new group may be added before Group 0 or after Group 2.

[0455] Similar to option 4 of embodiment BM1, CSI Part 1 may include z sets of CRIs and z sets of RIs instead of M sets of CRIs and M sets of RIs, and CSI Part 2 may include (Mz) sets of CRIs and (Mz) sets of RIs.

[0456] According to embodiment BM3, in multi-CRI reporting based on extended type 2CB, multiple CSI fields corresponding to M CRIs can be appropriately mapped to CSI Part 1 and CSI Part 2. CSI fields with higher priority can be mapped to CSI Part 1. Also, overhead of CSI Part 1 can be reduced.

[0457] <Embodiment BM4> (Rel. 16) For multi-CRI reporting based on extended type 2CB, reporting of M=2 CRIs is configured, and K S M of the CSI-RS resources R If the NW indicates / configures that =1 CSI-RS resource is (always) reported, one of several options and variations of embodiment BM3 may be applied.

[0458] <<<CRIs Corresponding to CSI Fields in CSI Part 1>>> One or more CRIs corresponding to at least one of the x1 sets of SB CQIs for the first TB, the y1 sets of WB CQIs for the first TB, the w sets of content in groups 0 / 1 / 2, and the w1 sets of content in group 0 may be choices 0 / 1 / 2 / 3 / 4 / 5 / 6 of option 5 in embodiment BM1. x1 in choices 0 / 1 / 2 / 3 / 4 / 5 / 6 of option 2 in embodiment BM2 may be replaced with at least one of y1, w, and w1.

[0459] Based on embodiment BL2, M of CRI R This set may not be explicitly reported by the UE.

[0460] According to embodiment BM4, in multi-CRI reporting based on extended type 2CB, all or part of multiple CSI fields corresponding to M CRIs can be appropriately mapped to CSI Part 1 and CSI Part 2. CSI fields with high priority can be mapped to CSI Part 1 while suppressing the overhead of CSI Part 1. R This CSI field can be given high priority.

[0461] ((Supplementary Note)) <<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, MAC CE, RRC message, LTE positioning protocol (LPP) message), specific signal / channel (e.g., DCI, PDCCH, PDSCH, reference signal), or a combination thereof.

[0462] 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. The MAC CE may be an extension of an existing MAC CE. For example, the MAC CE may be an existing MAC CE with a new octet introduced.

[0463] When the notification is performed by a DCI, the notification may be performed 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. The specific field may be an existing DCI field or a new DCI field. The RNTI may be an existing RNTI or a new RNTI. The format of the DCI may be an existing DCI format or a new DCI format.

[0464] In addition, notification of any information to the UE in the above embodiments may be periodic, semi-persistent (triggered by the UE or the gNB), or aperiodic (triggered by the UE or the gNB).

[0465] In the above embodiment, the UE may receive information on at least one of the following QCL rules from the NW: QCL Type A QCL Type B QCL Type C QCL Type D

[0466] In the above embodiment, the QCL source RS for each QCL type may be at least one of the following several RSs: ◆ SSB ◆ CSI-RS with / without repetition ◆ TRS ◆ DMRS of PDCCH / PDSCH

[0467] In the above-described embodiment, the information from the NW may be set / instructed by the following methods: Common to multiple UEs or UE-specific Cell-specific or common to multiple cells Per UE / per CC / per BWP / per band / per cell / per cell group (CG)

[0468] <<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, RRC message, LPP message), specific signals / channels (e.g., UCI, PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0469] 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. The MAC CE may be an extension of an existing MAC CE. For example, the MAC CE may be an extension of an existing MAC CE by introducing a new octet.

[0470] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0471] In addition, notification of any information from the UE in the above embodiments may be periodic, semi-persistent (triggered by the UE or the gNB), or aperiodic (triggered by the UE or the gNB).

[0472] <<Regarding Application of Each Embodiment>> In a UE / BS, specific (one or more) processes / operations / controls / assumptions / information for at least one of the above-mentioned embodiments may be applied (used) when one or more of the following conditions are met: - a higher layer parameter indicating the specific processes / operations / controls / assumptions / information is configured; - the specific processes / operations / controls / assumptions / information is determined based on related higher layer parameters; - the specific processes / operations / controls / assumptions / information is specified / activated / triggered by a MAC CE / DCI / UCI / resource / channel / RS; - a specific UE capability indicating (or related to) the specific processes / operations / controls / assumptions / information is reported or supported; - the application of the specific processes / operations / controls / assumptions / information is determined based on specific conditions.

[0473] The specific UE capability may indicate at least one of the following: ◆ Supporting the specific process / operation / control / assumption / information ◆ Capability of each embodiment ◆ Capability of each option in each embodiment, or capability of a combination of multiple options in each embodiment ◆ Capability of each option in each embodiment, or capability of a combination of multiple options in each embodiment ◆ Supporting CSI Part 1 including x1 sets of SB CQIs for the first TB ◆ Supporting CSI Part 1 for a specific CB type (e.g., multi-CRI reporting based on Type 1 (single panel) CB, or multi-CRI reporting based on Extended Type 2 CB) ◆ Supporting specific parameter settings (e.g., M R ◆ Supporting CSI Part 1 for a particular CB type (e.g., multi-CRI reporting based on Type 1 (single panel) CB or multi-CRI reporting based on extended Type 2 CB). ◆ Supporting CSI Part 1 for a particular parameter setting (e.g., M R◆ Supporting CSI Part 1 for the first TB (whether or not M is configured). ◆ Supporting CSI Part 1 including x2 sets of SB CQIs for the second TB. ◆ Supporting CSI Part 1 for a specific CB type (e.g., multi-CRI reporting based on Type 1 (single panel) CB or multi-CRI reporting based on extended Type 2 CB). ◆ Supporting CSI Part 1 for a specific parameter configuration (e.g., M R ◆ Supporting CSI Part 1 for the first TB (whether or not y2 sets of WB CQIs are configured). ◆ Supporting CSI Part 1 including y2 sets of WB CQIs for the second TB. ◆ Supporting CSI Part 1 for a specific CB type (e.g., multi-CRI reporting based on Type 1 (single panel) CB or multi-CRI reporting based on extended Type 2 CB). ◆ Supporting CSI Part 1 for a specific parameter configuration (e.g., M R Supports CSI Part 1 for the selected IEEE 802.11a / b / g / n / a / n / b ...a / n / b / n / a / n / b / n / a / n / a / n / a / n / a / n / a / n / a / n / a / n / a / n /

[0474] 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).

[0475] 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)).

[0476] If the above conditions are not met, the UE / BS may follow the behavior specified in existing 3GPP releases.

[0477] The information on whether one or more of the above embodiments / options / choices / examples apply / are used, or which of several of the above embodiments / options / choices / examples apply / are used, may be based on several of the following methods: ◆ The information is configured by one or more higher layer parameters / RRC IEs. ◆ The information is determined by one or more related higher layer parameters / RRC IEs. ◆ The information is indicated by a MAC CE / DCI. ◆ The information is based on one or more UE capabilities. ◆ The information is described / defined in a specification. ◆ The information is based on conditions described / defined in a specification. ◆ The information is determined by a combination of several of the above information. For example, the information is determined by the configuration / indication of higher layer parameters / MAC CE / DCI and reported by a UE capability.

[0478] The above embodiments / options / choices may be combined into one embodiment / option / choice.

[0479] In the above embodiments, the RS to be measured may be a QCL source RS in an active / indicated / unified TCI state.

[0480] (Supplementary Notes) The following inventions are supplemented with respect to one embodiment of the present disclosure. [Supplementary Note 1] A terminal comprising: a receiving unit that receives a reporting configuration of M channel state information reference signal resource indicators (CRIs) based on a Type 1 single panel codebook; and a control unit that controls, based on the configuration, transmission of a CSI Part 1 including one or more values ​​of one or more reporting quantities corresponding to one or more CRIs among the M CRIs, and a CSI Part 2 including multiple values ​​of the one or more reporting quantities corresponding to the remaining CRIs among the M CRIs. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein the one or more reporting quantities include at least one of a subband channel quality indicator (CQI) for a first transport block, a wideband CQI for the first transport block, a CRI, and a rank indicator (RI). [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the configuration indicates the one or more CRIs. [Supplementary Note 4] The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein the one or more CRIs is one CRI.

[0481] (Supplementary Notes) The following inventions are supplemented with respect to one embodiment of the present disclosure. [Supplementary Note 1] A terminal comprising: a receiving unit that receives a reporting configuration of M channel state information reference signal resource indicators (CRIs) based on an extended type-2 codebook; and a control unit that controls, based on the configuration, transmission of a CSI Part 1 including one or more values ​​of one or more reporting quantities corresponding to one or more CRIs among the M CRIs, and a CSI Part 2 including multiple values ​​of the one or more reporting quantities corresponding to the remaining CRIs among the M CRIs. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein the one or more reporting quantities include at least one of a subband channel quality indicator (CQI) for a first transport block, a wideband CQI for the first transport block, a CRI, and a rank indicator (RI). [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the configuration indicates the one or more CRIs. [Supplementary Note 4] The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein the one or more CRIs is one CRI.

[0482] (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.

[0483] 28 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).

[0484] 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.

[0485] 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.

[0486] 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))).

[0487] 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 location, number, shape, size, etc. of each cell and user terminal 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 the base station 10.

[0488] The wireless communication system 1 may utilize multi-input multi-output (MIMO). For example, one cell may be formed by one antenna / base station 10, or may be formed by multiple antennas / base stations 10. One [virtual] cell (which may be called, for example, a supercell) may be composed of multiple [virtual] cells (which may be called, for example, subcells). A supercell may correspond to a cell with a fixed physical range, and a subcell may correspond to a cell with a quasi-static / dynamically variable physical range. In this case, the wireless communication system 1 may be called a cell-free system.

[0489] 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).

[0490] 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.

[0491] 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.

[0492] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 / Xn 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.

[0493] 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.

[0494] 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.

[0495] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0496] 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).

[0497] 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.

[0498] 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.

[0499] 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.

[0500] 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).

[0501] 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.

[0502] 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.

[0503] 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.

[0504] 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.

[0505] 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.

[0506] 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.

[0507] 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.

[0508] 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.

[0509] 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).

[0510] 29 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.

[0511] 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.

[0512] 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.

[0513] 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.

[0514] 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.

[0515] 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.

[0516] 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.

[0517] 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.

[0518] 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.

[0519] 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.

[0520] 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.

[0521] 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.

[0522] 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.

[0523] 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.

[0524] 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.

[0525] 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.

[0526] 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.

[0527] The base station 10 may be separated into three elements: a radio unit (RU), a distributed unit (DU), and a central unit (CU). For example, the RU may implement RF processing (digital beamforming, digital-to-analog conversion, analog beamforming, etc.) and lower-level functions of the physical layer (precoding, IFFT, FFT, etc.). The DU may implement higher-level functions of the physical layer (coding to resource element mapping, etc.), MAC layer functions, and RLC layer functions. The CU may implement the functions of the PDCP layer, Service Data Adaptation Protocol (SDAP) layer, and RRC layer.

[0528] In the present disclosure, the base station 10 may include a single device that realizes all of the functions of the RU, DU, and CU, or may include multiple devices that each realize some of the functions of the RU, DU, and CU and are connected to each other. In the present disclosure, the base station 10 may be interchangeably read as RU / DU / CU.

[0529] The transceiver 120 may transmit a reporting configuration of M channel state information reference signal resource indicators (CRIs) based on a Type 1 single panel codebook. The controller 110 may control, based on the configuration, reception of a CSI Part 1 including one or more values ​​of one or more reporting quantities corresponding to one or more CRIs among the M CRIs and a CSI Part 2 including multiple values ​​of the one or more reporting quantities corresponding to the remaining multiple CRIs among the M CRIs.

[0530] The transceiver 120 may transmit a reporting configuration of M channel state information reference signal resource indicators (CRIs) based on an extended type 2 codebook. The controller 110 may control, based on the configuration, reception of CSI Part 1 including one or more values ​​of one or more reporting quantities corresponding to one or more CRIs among the M CRIs and CSI Part 2 including multiple values ​​of the one or more reporting quantities corresponding to the remaining multiple CRIs among the M CRIs.

[0531] (User terminal) Fig. 30 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 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0532] 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.

[0533] 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.

[0534] 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.

[0535] 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.

[0536] 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.

[0537] 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.

[0538] 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.

[0539] 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.

[0540] 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.

[0541] 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.

[0542] 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.

[0543] 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.

[0544] 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.

[0545] 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.

[0546] 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.

[0547] The measurement unit 223 may derive channel measurements for CSI calculation based on the channel measurement resources. The channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on the interference measurement resources. The interference measurement resources may be at least one of an NZP CSI-RS resource for interference measurement, a CSI-Interference Measurement (IM) resource, etc. Note that CSI-IM may be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. Note that in the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeably read as interchangeable.

[0548] 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.

[0549] The transceiver 220 may receive a reporting configuration of M channel state information reference signal resource indicators (CRIs) based on a Type 1 single panel codebook. Based on the configuration, the controller 210 may control transmission of CSI Part 1 including one or more values ​​(e.g., a set of x1 / x2 / y1 / y2 / z) of one or more reporting quantities (e.g., at least one of WB / SB CQI, CQI, and RI for the first / second TB) corresponding to one or more CRIs among the M CRIs, and CSI Part 2 including multiple values ​​of the one or more reporting quantities corresponding to the remaining multiple CRIs among the M CRIs.

[0550] The one or more reporting quantities may include at least one of a subband channel quality indicator (CQI) for a first transport block, a wideband CQI for the first transport block, a CRI, and a rank indicator (RI).

[0551] The configuration may indicate the one or more CRIs.

[0552] The one or more CRIs may be a single CRI.

[0553] The transceiver 220 may receive a reporting configuration of M channel state information reference signal resource indicators (CRIs) based on an extended type-2 codebook. Based on the configuration, the controller 210 may control transmission of CSI Part 1 including one or more values ​​(e.g., a set of x1 / x2 / y1 / y2 / w / w1) of one or more reporting quantities (e.g., at least one of WB / SB CQI for the first / second TB, CQI, RI, and groups 0 / 1 / 2) corresponding to one or more CRIs among the M CRIs, and CSI Part 2 including multiple values ​​of the one or more reporting quantities corresponding to the remaining multiple CRIs among the M CRIs.

[0554] The one or more reporting quantities may include at least one of a subband channel quality indicator (CQI) for a first transport block, a wideband CQI for the first transport block, a CRI, and a rank indicator (RI).

[0555] The configuration may indicate the one or more CRIs.

[0556] The one or more CRIs may be a single CRI.

[0557] (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.

[0558] 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.

[0559] 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. Figure 31 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.

[0560] 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.

[0561] 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.

[0562] 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.

[0563] 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.

[0564] 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.

[0565] 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.

[0566] 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.

[0567] 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.

[0568] 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).

[0569] 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.

[0570] 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.

[0571] In addition, the devices included in the core network 30 (for example, network nodes that provide NF) may also be realized by the above-mentioned functional block / hardware configuration.

[0572] (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.

[0573] 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.

[0574] 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.

[0575] 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.

[0576] 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.

[0577] 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.

[0578] 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.

[0579] 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.

[0580] 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.

[0581] 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.

[0582] 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.

[0583] 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.

[0584] 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.

[0585] 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.

[0586] 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.

[0587] 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.

[0588] 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.

[0589] 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.

[0590] 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."

[0591] 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.

[0592] 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.

[0593] 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.

[0594] 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.

[0595] 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.

[0596] 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.

[0597] With respect to any information (e.g., variables, constants, parameters) described in the present disclosure, even if not specifically stated in the above embodiments, any first device (e.g., UE / base station) may notify any second device (e.g., base station / UE) of information indicating / specifying (or relating to) the value of the any information.

[0598] 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.

[0599] 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).

[0600] 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).

[0601] 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).

[0602] 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.

[0603] 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.

[0604] 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).

[0605] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "layer," "number of layers," "rank," "resource," "resource set," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," "UE panel," "transmitting entity," "receiving entity," etc. may be used interchangeably.

[0606] In the present disclosure, the term "antenna port" may be interchangeably read as an antenna port for any signal / channel (e.g., a demodulation reference signal (DMRS) port). In the present disclosure, the term "resource" may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource, an SRS resource, etc.). The resource may include time / frequency / code / space / power resources. Furthermore, the spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0607] The group may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, and the like.

[0608] In addition, in the present disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable terms.

[0609] In addition, in the present disclosure, the terms TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0610] Furthermore, in the present disclosure, terms such as "QCL," "QCL assumption," "QCL relationship," "QCL type information," "QCL property / properties," "specific QCL type (e.g., Type A, Type D) property," and "specific QCL type (e.g., Type A, Type D)" may be interchangeable.

[0611] In the present disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interchangeable. In the present disclosure, terms such as sequence, list, set, group, cluster, and subset may be interchangeable.

[0612] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. The "spatial relationship information (TCI state)" may be interchangeable with "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. The TCI state and the TCI may be interchangeable. The spatial relationship information and the spatial relationship may be interchangeable.

[0613] 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.

[0614] 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.

[0615] 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.

[0616] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0617] 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.

[0618] 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.

[0619] 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.

[0620] 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.

[0621] 32 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.

[0622] 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.

[0623] 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).

[0624] 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.

[0625] 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.

[0626] 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.

[0627] 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.

[0628] 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.

[0629] 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).

[0630] 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.

[0631] 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)).

[0632] 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.

[0633] 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.

[0634] 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.

[0635] 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.

[0636] 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.

[0637] 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).

[0638] 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."

[0639] 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.

[0640] 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.

[0641] 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.

[0642] Furthermore, "determination" may be considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "determining" some kind of action. In the present disclosure, "determination" may be read interchangeably with the above-mentioned actions.

[0643] Furthermore, in this disclosure, "determine / determining" may be interchangeably read as "assume / assuming," "expect / expecting," "consider / considering," etc. Furthermore, in this disclosure, "does not expect to do..." may be interchangeably read as "assumes not to do...."

[0644] In the present disclosure, "expect" may be interchangeably read as "be expected." For example, "expect(s) ..." ("..." may be expressed, for example, as a that clause, a to-infinitive, etc.) may be interchangeably read as "be expected ..." or "do ... (if the above "..." is a to-infinitive, a verb with "to")," etc. "does not expect ..." may be interchangeably read as "be not expected ..." or "does not ... (if the above "..." is a to-infinitive, a verb with "to")," etc. Furthermore, "An apparatus A is not expected ..." may be interchangeably read as "an apparatus B other than apparatus A does not expect ... from apparatus A" (for example, if apparatus A is a UE, apparatus B may be a base station).

[0645] 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.

[0646] 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."

[0647] 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.

[0648] 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."

[0649] 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.

[0650] 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.

[0651] 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").

[0652] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0653] In the present disclosure, terms such as "when A, B," "if A, (then) B," "B upon A," "B in response to A," "B based on A," "B during / while A," "B before A," "B at (the same time as) / on A," "B after A," "B since A," and "B until A" may be interchangeable. Note that A, B, and the like herein may be replaced with appropriate expressions such as nouns, gerunds, and regular sentences, depending on the context. Note that the time difference between A and B may be approximately zero (immediately after or immediately before). A time offset may also be applied to the time at which A occurs. For example, "A" may be interchangeable with "before / after a time offset at which A occurs." The time offset (eg, one or more symbols / slots) may be predefined or may be specified by the UE based on signaled information.

[0654] In the present disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc. may be read interchangeably.

[0655] 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 description of the present disclosure is for illustrative purposes only and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. A terminal having: a receiving unit that receives a report configuration of M channel state information reference signal resource indicators (CRIs) based on an extended type 2 codebook; and a control unit that controls, based on the configuration, the transmission of a CSI part 1 that includes one or more values ​​of one or more reporting quantities corresponding to one or more CRIs among the M CRIs, and a CSI part 2 that includes multiple values ​​of the one or more reporting quantities corresponding to the remaining multiple CRIs among the M CRIs.

2. The terminal of claim 1, wherein the one or more reporting quantities include at least one of a subband channel quality indicator (CQI) for a first transport block, a wideband CQI for the first transport block, a CRI, and a rank indicator (RI).

3. The terminal of claim 1, wherein the configuration indicates the one or more CRIs.

4. The terminal of claim 1, wherein the one or more CRIs is a single CRI.

5. A wireless communication method for a terminal, comprising: receiving a reporting configuration of M channel state information reference signal resource indicators (CRIs) based on an extended type 2 codebook; and controlling, based on the configuration, transmission of CSI Part 1 including one or more values ​​of one or more reporting quantities corresponding to one or more CRIs among the M CRIs, and CSI Part 2 including multiple values ​​of the one or more reporting quantities corresponding to the remaining multiple CRIs among the M CRIs.

6. A base station having: a transmitter that transmits a reporting configuration of M channel state information reference signal resource indicators (CRIs) based on an extended type 2 codebook; and a controller that controls, based on the configuration, reception of a CSI part 1 including one or more values ​​of one or more reporting quantities corresponding to one or more CRIs among the M CRIs, and a CSI part 2 including multiple values ​​of the one or more reporting quantities corresponding to the remaining multiple CRIs among the M CRIs.

Images