Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure comprises: a reception unit that receives a configuration indicating a plurality of channel state information (CSI)-reference signal (RS) resources using more than 32 ports and a CSI codebook for Doppler; and a control unit that, on the basis of the configuration, determines at least one of the number of CSI processing units occupied in the processing of the CSI and the calculation time of the CSI.

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 measurement / reporting of a large number of channel state information-reference signal (CSI-RS) resources for managing a large number of beams has not been sufficiently considered. If such measurement / reporting is not sufficiently considered, it may result in a decrease in communication quality / throughput, etc.

[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 utilize multiple CSI-RS resources.

[0008] A terminal according to one aspect of the present disclosure includes a receiving unit that receives a configuration indicating a plurality of channel state information (CSI)-reference signal (RS) resources using more than 32 ports and a codebook of CSI for Doppler, and a control unit that determines, based on the configuration, at least one of the number of CSI processing units to be occupied in processing the CSI and the calculation time of the CSI.

[0009] According to one aspect of the present disclosure, multiple CSI-RS resources can be appropriately measured / reported.

[0010] Figure 1 shows an example of CSI-RS location within a slot. Figure 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 specification. Figure 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 specification. Figure 4 shows the association between the supported number of CSI-RS ports and the base station antenna layout for two-layer CSI reporting. 1,3 Figure 5 shows an example of mapping from k to k and k for 3-layer and 4-layer CSI reporting. 1,3Figure 6 shows an example of a mapping from k1 to k2. Figure 6 shows an example of a codebook for one-layer CSI reporting and codebookMode=1. Figure 7 shows an example of a codebook for one-layer CSI reporting and codebookMode=2 and N2>1. Figure 8 shows an example of a codebook for one-layer CSI reporting and codebookMode=2 and N2=1. Figure 9 shows an example of a codebook for two-layer CSI reporting and codebookMode=1. Figure 10 shows an example of a codebook for two-layer CSI reporting and codebookMode=2 and N2>1. Figure 11 shows an example of a codebook for two-layer CSI reporting and codebookMode=2 and N2=1. Figure 12 shows an example of a codebook for three-layer CSI reporting and codebookMode=1-2. Figure 13 shows an example of a codebook for five-layer CSI reporting and codebookMode=1-2. Figure 14 shows an example of a codebook for seven-layer CSI reporting and codebookMode=1-2. FIG. 15 shows an example of an 8-layer CSI report and a codebook for codebookMode=1-2. FIG. 16 shows an example of a plurality of CSI-RS resources that are frequency-division multiplexed (FDM). FIG. 17 shows an example of a plurality of CSI-RS resources that are time-division multiplexed (TDM). FIG. 18 shows an example of a configuration according to Option 1 of embodiment B1. FIG. 19 shows a first example of a configuration according to Option 2 of embodiment B1. FIG. 20 shows a second example of a configuration according to Option 2 of embodiment B1. FIGS. 21A and 21B show an example of a base station antenna layout according to Option 2 of embodiment B1. FIG. 22 shows a first example of a configuration according to Option 3 of embodiment B1. FIG. 23 shows a second example of a configuration according to Option 3 of embodiment B1. FIGS. 24A and 24B show an example of a base station antenna layout according to Option 3 of embodiment B1. FIGS. 25A and 25B show an example of a new (64,1) configuration for 128 ports according to embodiment C1. 26A to 26C show an example of a new (16,4) configuration for 128 ports according to embodiment C1. FIG. 27 shows an example of option 1-d of a new (16,4) configuration for 128 ports according to embodiment C1.FIG. 28 shows an example of option 2-a for a new (16,4) setting for 128 ports according to embodiment C1. FIG. 29 shows an example of association candidates that consider 32 existing ports (N1, N2) according to option 1 of embodiment C1. FIG. 30 shows an example of association candidates that consider 32 existing ports (N1, N2) according to option 1 of embodiment C2-1. FIG. 31 shows an example of association candidates that consider 24 existing ports (N1, N2) according to option 1 of embodiment C2-2. FIG. 32 shows an example of association candidates that consider 24 existing ports (N1, N2) according to option 1 of embodiment C3. FIG. 33 shows an example of association candidates that consider 32 existing ports (N1, N2) according to option 1 of embodiment C4. FIG. 34 shows an example of association candidates that consider 24 existing ports (N1, N2) according to option 1 of embodiment C5. FIG. 35 shows an example of association candidates for 32 ports for a multi-panel. FIG. 36 shows an example of multiple CSI-RS resources for multi-panel use. FIG. 37 shows an example of SD beam selection based on embodiment B. FIG. 38 shows an example of SD beam selection according to embodiment D1. FIG. 39 shows an example of Option A according to embodiment D1. FIG. 40 shows an example of Option B according to embodiment D1. FIG. 41 shows an example of Option C1 according to embodiment D1. FIG. 42 shows an example of Option C2 according to embodiment D1. FIG. 43 shows an example of reporting multiple SD beams. FIG. 44 shows an example of Option 2 according to embodiment E1. FIG. 45 shows an example of embodiment E2. FIG. 46 shows examples of Option 3 and Option A according to embodiment E3. FIG. 47 shows an example of association according to embodiment E0. FIG. 48 shows an example of parameter combinations in an extended type 2 PSCB. FIG. 49 shows an example of parameter combinations in an extended type 2 PSCB. FIG. 50 shows an example of parameter combinations in an additional extended type 2 PSCB. Figure 51 shows an example of option 1 of embodiment F2. Figure 52 shows an example of option 2 of embodiment F2. Figure 53 shows an example of option 3 of embodiment F2. Figure 54 shows an example of option 4 of embodiment F2. Figures 55A and 55B show an example of option 3 of embodiment G2.FIG. 56A and 56B show an example of Option 3-1 of embodiment G3. FIG. 57A and 57B show an example of Option 3-2 of embodiment G3. FIG. 58A to 58C show an example of interpretation of powerControlOffset. FIG. 59A to 59C show an example of interpretation of powerControlOffsetSS. FIG. 60 shows an example of transmission of K groups according to embodiment H2. FIG. 61 shows an example of CSI calculation delay requirement 1. FIG. 62 shows an example of CSI calculation delay requirement 2. FIG. 63 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 64 is a diagram showing an example of a configuration of a base station according to an embodiment. FIG. 65 is a diagram showing an example of a configuration of a user terminal according to an embodiment. FIG. 66 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. FIG. 67 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 frequency granularity of the CSI report. The frequency granularity may include, for example, a wideband and a subband. The wideband is the entire CSI reporting band. The wideband may be, for example, the entirety of a certain carrier (a component carrier (CC)), a cell, or a serving cell) or the entirety of a bandwidth part (BWP) within a certain carrier. The wideband may also be referred to as the CSI reporting band, the entire CSI reporting band, etc.

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

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

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

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

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

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

[0035] 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).

[0036] 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.

[0037] (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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] <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.

[0042] <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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] (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.

[0047] 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.

[0048] 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, and an SD basis may be interpreted interchangeably.

[0049] In the present disclosure, the terms port, antenna port, CSI-RS port, port index, and port number may be interchangeable.

[0050] 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 interchangeably.

[0051] 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.

[0052] In the present disclosure, the terms Type 1 codebook, Type 1 single-panel codebook, and Type 1 multi-panel codebook may be interpreted interchangeably.

[0053] (Type 1 Single Panel 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 ,i 1,2 ,i 1,3 , i2. If the number of layers v is not {2,3,4}, then the composite codebook index i1 = [i 1,1 i 1,2 ]. When the number of layers v∈{2,3,4}, the composite codebook index i1=[i 1,1 i 1,2 i 1,3 ].

[0054] 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.

[0055] 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 The precoding matrix for <16 and v=3,4 is W l,l',m,m',n (v) It is expressed as P CSI-RSThe 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-RS Of the (≧16) ports, the first half of the ports are 0 and the second half of the ports are 1.

[0056] 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:

[0057] B shows L 2D DFT beams, each oversampled by (O1, O2).

[0058] 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 1,3is 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.

[0059] 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:

[0060] φ for the precoding matrix n , θ p , u m , v l,m , v ~ l,m is given by the following equation E3:

[0061] 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.

[0062] (Type 1 Multi-Panel 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. g Compared 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.

[0063] 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.

[0064] 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.

[0065] 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 ].

[0066] When the codebook mode is set to 1, N g = 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).

[0067] 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.

[0068] Codebook mode 2 has a larger feedback overhead because it reports more phase differences for more accurate CSI. g Only supported for =2.

[0069] 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.

[0070] φ for the precoding matrix n , a p , b p , u m , v l,m is given by the following equation E4:

[0071] 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].

[0072] 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:

[0073] 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_1represents 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.

[0074] 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:

[0075] 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.

[0076] (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.

[0077] (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'.

[0078] In this disclosure, a matrix Z with X rows and Y columns may be expressed as Z(X×Y).

[0079] 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)

[0080] 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).

[0081] 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 also be expressed as:

[0082] 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,l Also, Type 2 CSI in Rel. 15 only supports ranks 1 and 2.

[0083] 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.

[0084] ((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'.

[0085] 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.

[0086] 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)

[0087] 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

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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).

[0093] 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 vis the same for all layers l∈{1,2,3,4}. v is set by higher layers.

[0094] The multiple precoding matrix indicated by the PMI is L+M v is determined from vectors.

[0095] 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

[0096] 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}.

[0097] 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 are 0,l (f) ,y 1,l (f) ,...,y N_3-1,l (f) ] T is.

[0098] W 2,lEach 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

[0099] 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.

[0100] In the extended type 2 codebook, L, β, p vThe 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.

[0101] In the present disclosure, the terms codebook parameter combination, codebook parameter combination, parameter combination, and parameter combination setting may be read interchangeably.

[0102] 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.

[0103] 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. initialand 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.

[0104] 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 i 1,7,3 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)

[0105] 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 i 2,4,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) ).i1,8,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 ].

[0106] f l * ∈{0,1,...,M v -1}, i 2,4,l Let 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.

[0107] 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) p l,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}.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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) ∈{0,1,...,N2-1}. n1 (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,f denotes 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.

[0112] For CSI Part 2 grouping, for a given CSI report, the PMI information is grouped into three groups (groups 0 to 2). This is important when CSI omission is performed. Index i 2,4,l , i 2,5,l , i 1,7,l Each reported element of is associated with a specific priority rule. Groups 0 to 2 follow the following: ◆ Group 0: Index i 1,1 , i 1,2 , i 1,8,l (l=1,...,v) ◆Group 1: Index i (if reported) 1,5, index i (if reported) 1,6,l , i 1,7,l The highest (top) v2LM v -floor(K NZ / 2) priority elements, i 2,3,l , i 2,4,l The highest (upper) ceil(K NZ / 2)-v priority elements, i 2,5,l The highest (upper) ceil(K NZ / 2)-v priority elements (l=1,...,v) ◆Group 2: i 1,7,l The lowest (lowest) floor(K NZ / 2) priority elements, i 2,4,l The lowest (lowest) floor(K NZ / 2) priority elements, i 2,5,l The lowest (lowest) floor(K NZ / 2) priority elements (l=1,...,v)

[0113] 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.

[0114] (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'.

[0115] 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.

[0116] 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).

[0117] For each polarization, L antenna ports are 1,1 Selected by i 1,1 ∈{0,1,...,ceil(P CSI-RS / (2d))-1}.

[0118] ((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'.

[0119] 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.

[0120] 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)

[0121] 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}.

[0122] 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.

[0123] 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.

[0124] 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).

[0125] 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'.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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-RSis 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.

[0130] 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}.

[0131] 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.

[0132] 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)

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] (JT) Joint transmission (JT) may refer to simultaneous data transmission from multiple points (eg, TRPs) to a single UE.

[0138] 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.

[0139] 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.

[0140] (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:

[0141] 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).

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] 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).

[0147] 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.

[0148] (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.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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 lThese used policies relate to deployment scenarios (e.g., intra-site multi-TRP or inter-site multi-TRP).

[0154] 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. f may be the same or different, and may be jointly or individually selected.

[0155] 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.

[0156] ◆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.

[0157] ◆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.

[0158] In these two modes, detailed designs such as parameter combination, basis selection, TRP (group) selection, reference amplitude, and W2 quantization method may be shared.

[0159] 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'.

[0160] The UE uses N TRP ∈{1,2,3,4} CSI-RS resources can be configured.

[0161] 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.

[0162] 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.

[0163] The UE may configure the upper layer parameter restrictedCMR-Selection. If restrictedCMR-Selection is configured, the number of selected CSI-RS resources N is N TRP 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.

[0164] In selecting / reporting an SD beam, selection / reporting of an SD beam per CSI-RS resource is applied.

[0165] 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.

[0166] 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,jq 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)

[0167] 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.

[0168] 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)

[0169] 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.

[0170] (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).

[0171] 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.

[0172] 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.

[0173] 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.

[0174] The CMR can be used to measure the effect of Doppler shift, but the RS used for the measurement depends on the UE implementation.

[0175] 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.

[0176] 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.

[0177] 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.

[0178] 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 also be expressed as:

[0179] 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.

[0180] A d-slot may be of duration in DD units.

[0181] 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.

[0182] For the parameter δ, an additional value of 2 is supported.

[0183] N4 is set by the base station via an upper layer parameter N4.

[0184] 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:

[0185] 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:

[0186] 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.

[0187] 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'.

[0188] 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.

[0189] (TDCP Reporting) Reporting of time domain channel properties (TDCP) from the UE is under consideration.

[0190] 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.

[0191] 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).

[0192] (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.

[0193] 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.

[0194] 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).

[0195] 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.

[0196] In Rel. 19 and later, massive MIMO using more than 32 ports is being considered.

[0197] (Base Station Antenna Layout) Figure 2 shows a table relating the supported number of CSI-RS ports to the base station antenna layout ((N1, N2) and (O1, O2) settings) for a single panel in the existing specifications. Figure 3 shows a table relating the supported number of CSI-RS ports to the base station antenna layout ((N g , N1, N2) and (O1, O2) settings).

[0198] (Example of Type-1 Single Panel Codebook) In addition to the codebook for the aforementioned 1-layer CSI reporting and codebook mode (codebookMode)=1, type-1 single panel codebooks for at least one of other codebook modes and other ranks (number of layers) are defined.

[0199] For rank {1,5,6,7,8}, the codebook index for each PMI is i1,1 , i 1,2 , and i2. For rank {2,3,4}, the codebook index for each PMI is i 1,1 , i 1,2 , i 1,3 , and i2. i 1,1 and i 1,2 corresponds to the two dimensions, respectively, and is an index for beam selection. i2 is an index for the phase difference (co-phasing) between the two polarizations. i 1,3 is mapped to k1 and k2 according to the mapping (table) in the specification. 1,3 Figure 5 shows the mapping of i for 3-layer and 4-layer CSI reporting. 1,3 to k1 and k2.

[0200] The codebook (relationship between precoding matrix and codebook index) for 1-layer CSI reporting and codebookMode=1 is defined in the specifications (Fig. 6).

[0201] As codebooks for 1-layer CSI reporting and codebookMode=2, the specifications specify a codebook for N2>1 (FIG. 7) and a codebook for N2=1 (FIG. 8). For N2=1, there is no oversampling in the N2 dimension, so i 1,2 is not reported.

[0202] The codebook for two-layer CSI reporting and codebookMode=1 is specified in the specification (Figure 9). l,m and φ n v l,m corresponds to the first layer. l',m' and -φ n v l',m' corresponds to the second layer. The beam for the second layer is determined by l' and m'. l' and m' are the 1,1 +k1 and i 1,2 k1 and k2 are determined by the i reported by the UE as described above. 1,3 is determined by.

[0203] As codebooks for two-layer CSI reporting and codebookMode=2, the specifications specify a codebook for N2>1 (FIG. 10) and a codebook for N2=1 (FIG. 11). For N2=1, there is no oversampling in the N2 dimension, so i 1,2 is not reported.

[0204] The specification specifies three-layer CSI reporting and codebooks for codebookMode=1-2 (FIG. 12). p indicates the phase difference of the second half port relative to the first half port.

[0205] The codebook structure for 4-layer CSI reporting and codebookMode=1-2 is similar to the codebook structure for 3-layer CSI reporting and codebookMode=1-2.

[0206] The specification specifies 5-layer CSI reporting and codebooks for codebookMode=1-2 (see FIG. 13). The relationship (PMI) for N2>1 is different from the relationship (PMI) for N2=1.

[0207] The codebook structure for 6-layer CSI reporting and codebookMode=1-2 is similar to the codebook structure for 5-layer CSI reporting and codebookMode=1-2.

[0208] The specification defines 7-layer CSI reporting and codebooks for codebookMode=1-2 (Figure 14). The relationship (PMI) varies depending on the values ​​of N1 and N2.

[0209] The codebook structure for 8-layer CSI reporting and codebookMode=1-2 is similar to the codebook structure for 7-layer CSI reporting and codebookMode=1-2.

[0210] For CSI-RS with more than 32 ports, the CSI / codebook based on the Rel. 15 Type 1 Single Panel CSI (Type 1 Single Panel Codebook) has not been fully explored.

[0211] (CSI Processing Criteria: Physical Layer Procedure for Data / Physical Downlink Shared Channel Related Procedure / UE Procedure for Reporting CSI / CSI Framework) ((Number of Consumed CPUs)) The UE uses the following capability information to determine the number of supported simultaneous CSI calculations (maximum number of simultaneous CSI calculations) N CPU Report / display N CPUindicates the number of CSI processing units (CPUs). - simultaneousCSI-ReportsPerCC in csi-ReportFramework in MIMO-ParametersPerBand. MIMO-ParametersPerBand is used to convey MIMO-related parameters specific to a certain band. csi-ReportFramework indicates whether the UE supports the CSI reporting framework. simultaneousCSI-ReportsPerCC indicates the number of CSI reports that the UE can simultaneously measure and process reference signals within one CC of a band where this capability is provided. CSI reports include periodic, semi-persistent, and aperiodic CSI, and any latency class and codebook type. CSI reports in simultaneousCSI-ReportsPerCC include beam reports and CSI reports. - simultaneousCSI-ReportsAllCC in CA-ParametersNR. simultaneousCSI-ReportsAllCC indicates whether the UE supports the CSI reporting framework and the number of CSI reports the UE can process simultaneously across all CCs (master cell group (MCG) and secondary cell group (SCG) in the case of NR-DC). CSI reports include periodic, semi-persistent, and aperiodic CSI, and any latency class and codebook type. CSI reports in simultaneousCSI-ReportsAllCC include beam reports and CSI reports. This parameter is further limited by simultaneousCSI-ReportsPerCC and Phy-ParametersFRX-Diff in MIMO-ParametersPerBand for each band in a given band combination.

[0212] UE is N CPU If the UE supports N simultaneous CSI calculations, the UE uses N CPUIf L CPUs are dedicated to the calculation of CSI reports in a given OFDM symbol, the UE is said to have N CPU -L free CPUs. N CPU On the same OFDM symbol where L CPUs are not occupied, N CSI reports start by occupying their respective CPUs, and O of each CSI report n=0,...,N-1 of the N CSI reports CPU (n) (the number of CPUs consumed for CSI report n), the UE selects the lowest priority (the highest priority value Pri iCSI (y, k, c, s)), where 0≦M≦N, is not required to update (calculate, process) the NM requested CSI reports from Σ n=0 M-1 O CPU (n) ≦N CPU -L is the maximum value for which it holds.

[0213] The UE is CPU It is not assumed that the A-CSI trigger state will be configured with more than one report setting. The processing of the CSI report will occupy some CPUs in some symbols, such as the following processes 1, 2, a, and 3. The processing of the CSI report may occupy 0, 1, or more CPUs (O CPU , number of CPUs consumed) (CPU occupancy rule).

[0214] - Procedure 1: In the case where CSI reporting is configured with CSI-ReportConfig with higher layer parameter reportQuantity set to 'none' and CSI-RS-ResourceSet with higher layer parameter trs-Info, CPU =0.

[0215] - Operation 2 (Beam Management) In a CSI report with CSI-ReportConfig with higher layer parameter reportQuantity set to 'cri-RSRP', 'ssb-Index-RSRP', 'cri-SINR', 'ssb-Index-SINR', 'cri-RSRP-Capability[Set]Index', 'ssb-Index-RSRP-Capability[Set]Index', 'cri-SINR-Capability[Set]Index', 'ssb-Index-SINR-Capability[Set]Index', or 'none' (if CSI-RS-ResourceSet with higher layer parameter trs-Info is not configured), O CPU =1.

[0216] - Process a (TDCP Reporting) For CSI reporting using CSI-ReportConfig with higher layer parameter reportQuantity set to 'tdcp' and the number of delays Y set by higher layer parameter Y, CPU = (Y+1), where the value of X >= 1 is reported by the UE capability.

[0217] - Procedure 3: In a CSI report with CSI-ReportConfig with higher layer parameter reportQuantity set to 'cri-RI-PMI-CQI', 'cri-RI-i1', 'cri-RI-i1-CQI', 'cri-RI-CQI', or 'cri-RI-LI-PMI-CQI', CPU follows the following process 3-x: -- Process 3-1 (case where the UE can use the maximum of the UE capability) max{μ PDCCH , μ CSI-RS , μ UL}≦3 and CSI reporting without PUSCH transmission with at least one of transport block and HARQ-ACK is triggered aperiodically when L=0 CPUs are occupied, the CSI corresponds to a single CSI with wideband frequency-granularity and 4 or less CSI-RS ports in a single resource without CRI reporting, the codebookType is set to 'typeI-SinglePanel' and the reportQuantity is set to 'cri-RI-CQI', CPU =N CPU μ PDCCH μ is the subcarrier spacing (SCS) setting of the PDCCH. CSI-RS is the SCS setting of the CSI-RS. μ UL is the SCS configuration of the UL BWP where the CSI report is transmitted. -- Procedure 3-2 (NCJT CSI case) If a CSI-ReportConfig with codebookType set to 'typeI-SinglePanel' is configured and the corresponding CSI-RS resource set for channel measurement is configured with two resource groups and N resource pairs, then O CPU = X·N+M, where X is the number of CPUs occupied by a pair of CMRs according to the UE capability. The UE capability mTRP-CSI-numCPU-r17 indicates the number of CPUs occupied by a pair of CMRs for the NCJT CSI hypotheses. K SNZP for channel measurement with K1 resources = K1 + K2 resources For M1 resources and M2 resources associated with CRI values ​​for resource group 1 with K1 resources and resource group 2 with K2 resources in the CSI-RS resource set, M = M1 + M2. -- Process 3-3 (CJT CSI case) A CSI-ReportConfig is configured with the upper layer parameters reportQuantity set to 'cri-RI-PMI-CQI' and codebookType set to 'typeII-CJT-r18' or 'typeII-CJT-PortSelection-r18', and the corresponding 1 < N TRP If an NZP-CSI-RS-ResourceSet for channel measurement with ≤ 4 resources is configured, O CPU =X・N TRP where the value of X≧1 is reported by the UE capability. -- Procedure 3-4 (Doppler CSI case) If CSI-ReportConfig is configured with the higher layer parameter reportQuantity set to 'cri-RI-PMI-CQI' and the codebookType set to 'typeII-Doppler-r18' or 'typeII-Doppler-PortSelection-r18', then O CPU The following procedure 3-4-x is followed: --- Procedure 3-4-1: If the corresponding CSI-RS resource set for channel measurement is aperiodic (AP) and configured with K CSI-RS resources, then O for K=12. CPU = 8, and for K < 12, O CPU = Y1·K, where Y1∈{1,2,3} is reported by the UE capability indication. --- PROCEDURE 3-4-2 If the corresponding CSI-RS resource set for channel measurement is periodic (P) or semi-persistent (SP) and configured with a single CSI-RS resource, then for N4=1, O CPU = 4, and for N4 > 1, OCPU = Y2·N4≧4, where N4 is set by the higher layer parameter N4 and Y2∈{2 / 3,1,2,3} is reported by the UE capability indication. -- Process 3-5 Otherwise, O CPU =K S It is. K S is the number of CSI-RS resources in the CSI-RS resource set for channel measurement.

[0218] (CPU Occupancy) For a CSI report with CSI-ReportConfig with the higher layer parameter reportQuantity not set to 'none', one or more CPUs are occupied for the following OFDM symbols (CPU occupation duration): A P-CSI or SP-CSI report occupies one or more CPUs from the first symbol of the earliest one of the CSI-RS / CSI-IM / SSB resources for channel or interference measurement, where the last CSI-RS / CSI-IM / SSB occasion precedes the corresponding CSI reference resource, until the last symbol of the PUSCH / PUCCH configured to carry the report (CPU occupation duration 1). The P-CSI or SP-CSI report excludes the first SP-CSI report on the PUSCH after the PDCCH that triggers the report. The time during which the P-CSI report or SP-CSI report occupies one or more CPUs may be referred to as CPU occupation duration 1. - An A-CSI report occupies one or more CPUs from the first symbol after the PDCCH that triggers the CSI report to the last symbol of the configured PUSCH / PUCCH that carries the report (CPU occupation duration 2). If the PDCCH reception includes two corresponding PDCCH candidates from two search space sets, the PDCCH candidate that ends later is used to determine the CPU occupation duration. The time during which the A-CSI report occupies one or more CPUs may be referred to as CPU occupation duration 2. - The first SP-CSI report on the PUSCH after the PDCCH trigger occupies one or more CPUs from the first symbol after the PDCCH to the last symbol of the scheduled PUSCH that carries the report (CPU occupation duration 3). If the PDCCH reception includes two corresponding PDCCH candidates from two search space sets, the PDCCH candidate that ends later is used to determine the CPU occupation duration. The time during which the SP-CSI report occupies one or more CPUs may be referred to as CPU occupation duration 3.- The SP CSI report on PUSCH, where the CSI-ReportConfig with the higher layer parameter codebookType set to 'typeII-Doppler-r18' or 'typeII-Doppler-PortSelection-r18' is configured, is not later than the CSI reference resource, K. P occupies one or more CPUs from the first symbol of the th most recent consecutive P / SP CSI-RS occasion to the last symbol of the PUSCH carrying that report, where K P The values ​​∈{1,2,4} are indicated / reported by the UE capabilities.

[0219] In any slot, the UE is not expected to have more active CSI-RS ports or active CSI-RS resources in the active BWP than the number reported as its capabilities. NZP CSI-RS resources are active for a duration defined as follows: - The duration for A-CSI-RS starts from the end of the PDCCH containing the request and ends at the end of the scheduled PUSCH containing the report associated with that A-CSI-RS. - The duration for SP-CSI-RS starts from the end of the time when the activation command applies and ends at the end of the time when the deactivation command applies. - The duration for P-CSI-RS starts when the P-CSI-RS is configured by higher layer signaling and ends when the P-CSI-RS configuration is released.

[0220] (CSI-RS Resource Counting) If a CSI-RS resource is referenced N times by one or more CSI reporting settings that are not configured with the higher layer parameter csi-ReportSubConfigList, then that CSI-RS resource and the CSI-RS ports within that CSI-RS resource are counted N times.

[0221] For a P / SP CSI-RS resource in a CSI-RS resource set for channel measurement that is linked to a CSI-ReportConfig configured with the upper layer parameter codebookType set to 'typeII-Doppler-r18' or 'typeII-Doppler-PortSelection-r18', the CSI-RS resource and the CSI-RS port in the CSI-RS resource are P It is counted K times. P The values ​​∈{1,2,4} are indicated / reported by the UE capabilities.

[0222] A P-CSI-RS is always counted as an active CSI-RS regardless of whether it is received on that OFDM symbol or not.

[0223] The UE reports UE capability information (codebookParameter) related to the codebook of the CSI report for each band.

[0224] The codebookParameter indicates the codebook (type) and corresponding parameters supported by the UE. Reporting of parameters corresponding to Type 1 single panel is mandatory. Reporting of parameters corresponding to Type 1 multi-panel, Type 2, and Type 2 port selection is optional. The parameters may include at least one of maxNumberTxPortsPerResource, maxNumberResourcesPerBand, and totalNumberTxPortsPerBand. maxNumberTxPortsPerResource indicates the maximum number of transmit ports in one resource. maxNumberResourcesPerBand indicates the maximum number of resources that can be used simultaneously across all CCs in one band. totalNumberTxPortsPerBand indicates the maximum number of transmit ports that can be used simultaneously across all CCs in one band.

[0225] In this disclosure, CPU occupation, number of occupied CPUs, number of CPUs, O CPU, and the number of CPUs consumed may be read interchangeably.

[0226] (CSI Reference Resource Definition: Physical Layer Procedures for Data / Physical Downlink Shared Channel Related Procedures / UE Procedures for Reporting CSI / CSI) ((CSI Reference Resource)) The CSI reference resource for a serving cell is defined as follows: ◆ In the frequency domain, a CSI reference resource is defined by a group of multiple DL PRBs corresponding to the band to which the derived CSI relates. ◆ In the time domain, a CSI reference resource is defined by a single DL slot nn CSI_ref -K offset ・2 μ_DL / 2 μ_Koffset where K offset is a parameter set by the upper layer, and μ_Koffset is the offset μ_DL is the subcarrier spacing setting for DL, with a value of 0 in FR1. μ_DL is the subcarrier spacing setting for DL. -◆In P / SP-CSI reporting, if a single CSI-RS / SSB for channel measurement is configured, n CSI_ref is a 4.2 that corresponds to an available DL slot. μ_DL If multiple CSI-RS / SSBs are configured for channel measurement, n CSI_ref is a 5.2 that corresponds to an available DL slot. μ_DL - In AP-CSI reporting, if the UE is instructed by DCI to report CSI in the same slot as the CSI request, n CSI_ref is such that the reference resource is in the same valid DL slot as the corresponding CSI request, otherwise, CSI_ref is slot n CSI_ref corresponds to a valid DL slot, symb slot ) where Z' corresponds to the delay requirement. N symb slotis the number of symbols in a slot. -◆If CSI-RS / CSI-IM or SSB of P or SP is used for channel / interference measurement, the UE is not expected to measure the channel / interference for CSI-RS / CSI-IM / SSB whose last OFDM symbol is received no later than Z' symbols before the transmission time of the first OFDM symbol of the AP-CSI report.

[0227] If a slot in the serving cell contains at least a DL or flexible symbol configured by higher layers and the slot is not within a measurement gap configured for the UE, the slot is considered a valid DL slot.

[0228] (CSI Reporting Conditions) After CSI reporting (re)configuration, serving cell activation, BWP change, or SP-CSI activation, the UE reports a CSI report only after receiving at least one CSI-RS transmission occasion for channel measurement and a CSI-RS / CSI-IM occasion for interference measurement when the CSI reference resource is not later than the CSI reference resource. Otherwise, the UE drops the report.

[0229] For a CSI reporting configuration (CSI-ReportConfig) that includes a list of sub-configurations provided by csi-ReportSubConfigList, after a CSI reporting (re)configuration, serving cell activation, BWP change, or SP-CSI activation, the UE reports a CSI report including one or more sub-reports only after receiving at least one CSI-RS transmission occasion for channel measurement and a CSI-RS / CSI-IM occasion for interference measurement for each sub-configuration when the CSI reference resource is not later than the CSI reference resource. Otherwise, the UE drops the report. Here, the sub-configuration is the sub-configuration activated / triggered for SP-CSI reporting.

[0230] For a CSI-ReportConfig configured with two resource groups and N resource pairs for channel measurement in the corresponding CSI-RS resource set, after a CSI reporting (re)configuration, serving cell activation, BWP change, or SP-CSI activation, the UE reports a CSI report only if the UE has received at least one CSI-RS transmission occasion for each of the CSI-RS resources in the corresponding CSI-RS resource set for channel measurement not later than the CSI reference resource and within the same DRX active time if DRX is configured. Otherwise, the UE drops the report.

[0231] For a CSI-ReportConfig configured with codebookType set to 'typeII-CJT-r18' or 'typeII-CJT-PortSelection-r18', after a CSI reporting (re)configuration, serving cell activation, BWP change, or SP-CSI activation, the UE reports a CSI report only after receiving at least one CSI-RS transmission occasion for each of the CSI-RS resources in the corresponding CSI-RS resource set for channel measurement and one CSI-RS / CSI-IM occasion for the CSI-RS / CSI-IM resources in the corresponding resource set for interference measurement, not later than the CSI reference resource and within the same DRX active time if DRX is configured. Otherwise, the UE drops the report.

[0232] For a CSI-ReportConfig configured with codebookType set to 'typeII-Doppler-r18' or 'typeII-Doppler-PortSelection-r18', after a CSI reporting (re)configuration, serving cell activation, BWP change, or SP-CSI activation, the UE transmits at least one aperiodic CSI-RS transmission occasion for each of multiple CSI-RS resources in the corresponding CSI-RS resource set for channel measurement when the UE is not later than the CSI reference resource and within the same DRX active time if DRX is configured, or p The UE reports a CSI report only if it receives K periodic or semi-persistent consecutive multiple CSI-RS transmission occasions and one CSI-RS / CSI-IM occasion for the CSI-RS / CSI-IM resources in the corresponding resource set for interference measurement. Otherwise, the UE drops the report. p The values ​​∈{1,2,4} are indicated by the UE capabilities.

[0233] For a CSI-ReportConfig configured with the higher layer parameter reportQuantity set to 'tdcp', after a CSI reporting (re)configuration, serving cell activation, BWP change, or SP-CSI activation, the UE shall determine the K of the corresponding CSI-RS resource settings for channel measurement when the UE is not behind the CSI reference resource and within the same DRX active time if DRX is configured. TRS The UE reports a CSI report only if it has received at least one CSI-RS transmission occasion for each CSI-RS resource in the CSI-RS resource set, otherwise it drops the report.

[0234] If DRX is configured, the UE shall report a CSI report only if it receives at least one CSI-RS transmission occasion for channel measurement and one CSI-RS / CSI-IM occasion for interference measurement not later than the CSI reference resource and within the DRX active time, otherwise it shall drop the report.

[0235] For a CSI reporting configuration in CSI-ReportConfig associated with higher layer parameter reportQuantity having at least 'RI' on a serving cell for which cell DTX is activated, the UE shall report a CSI report only if the UE receives at least one CSI-RS transmission occasion for each periodic CSI-RS resource or each semi-persistent CSI-RS resource for channel / interference measurement not later than the CSI reference resource and within the active period of cell DTX. Otherwise, the UE shall drop the CSI report.

[0236] As described above, multiple UE behaviors are defined for multiple values ​​of at least one setting of the report / resource setting method, the codebook type, and the report quantity (reportQuantity).

[0237] (UE Assumptions for CQI / PMI / RI Calculation) The UE assumes that the corresponding PDSCH signals transmitted on antenna ports [3000,...,3000+P+1] have a ratio of EPRE to CSI-RS EPRE equal to the ratio given by powerControlOffset.

[0238] (UE assumption for CQI / PMI / RI calculation for NCJT) v transmitted on P antenna ports of multiple CSI-RS resources in group j j The UE assumes that the corresponding PDSCH signal for this layer has a ratio of EPRE to CSI-RS EPRE equal to powerControlOffset.

[0239] (UE Assumptions for Calculating CQI / PMI / RI for CJT) PDSCH signals for v layers are distributed over multiple CSI-RS resources σ j The UE may assume that for all j=1,...,N0, the UE has the same ratio of EPRE to CSI-RS EPRE, which is equal to powerControlOffset.

[0240] (UE CSI Calculation Time: Physical Layer Procedures for Data / Physical Downlink Shared Channel Related Procedures) When a CSI request field on the DCI triggers a CSI report on the PUSCH, the UE provides a valid CSI report for the n-th triggered report if the following conditions are met: The first uplink symbol carrying one or more corresponding CSI reports and including the effect of timing advance is symbol Z. ref (symbol Z ref the first uplink symbol carrying the nth CSI report and including the effect of timing advance is symbol Z' ref (n) does not start earlier than (symbol Z' ref (n) or later).

[0241] Z ref is the next uplink symbol after the end of the last symbol of the PDCCH that triggers the one or more CSI reports, and its cyclic prefix (CP) is T proc,CSI =(Z)(2048+144)・κ2 -μ ・T C +T switch Z' is defined as a symbol starting at ref is the next uplink symbol after the end of the last symbol of the latest of the following times, when the A-CSI-RS is used for channel measurement for the n-th triggered CSI report, and its CP is T' proc,CSI =(Z')(2048+144)・κ2 -μ ・T C- A-CSI-RS resources for channel measurements, - A-CSI-IM used for interference measurements, and - A-NZP-CSI-RS for channel measurements.

[0242] T switch is defined in the specification and applies only if Z1 applies.

[0243] If a PDCCH reception includes two corresponding PDCCH candidates from two search space sets, the PDCCH candidate that ends later in time is used to determine the last symbol of the PDCCH that triggers the CSI report.

[0244] Z, Z' and μ are defined as follows:

[0245] Z = max(Z(m)) for m = 0,...,M-1. Z' = max(Z'(m)) for m = 0,...,M-1, where M is the number of updated CSI reports. (Z(m),Z'(m)) corresponds to the mth updated CSI report and is defined as follows: where CSI computation delay requirement 1 denotes (Z1,Z'1) [symbols] for μ∈{0,1,2,3}, and CSI computation delay requirement 2 denotes (Z1,Z'1), (Z2,Z'2), (Z3,Z'3) [symbols] for μ∈{0,1,2,3,4,5,6}.

[0246] - max{μ PDCCH ,μ CSI-RS ,μ UL}≦3, and L=0 CPUs are occupied, the CSI to be transmitted is a single CSI, corresponds to wideband frequency granularity, the CSI corresponds to a maximum of four CSI-RS ports in a single resource without CRI reporting, and CodebookType is set to 'typeI-SinglePanel' or reportQuantity is set to 'cri-RI-CQI', and if the CSI is triggered without a PUSCH with a transport block or HARQ-ACK or both, then (Z(m), Z'(m)) is defined as (Z1, Z'1) in CSI calculation delay requirement 1.

[0247] - If the CSI to be transmitted corresponds to wideband frequency granularity, and the CSI corresponds to up to four CSI-RS ports in a single resource without CRI reporting, and CodebookType is set to 'typeI-SinglePanel' or reportQuantity is set to 'cri-RI-CQI', then (Z(m), Z'(m)) is defined as (Z1, Z'1) in CSI calculation delay requirement 2.

[0248] - If the CSI to be transmitted corresponds to wideband frequency granularity and reportQuantity is set to 'ssb-Index-SINR', 'cri-SINR', 'ssb-Index-SINR-Index' or 'cri-SINR-Index', then (Z(m), Z'(m)) is defined as (Z1, Z'1) in CSI calculation delay requirement 2.

[0249] - reportQuantity is set to 'cri-RSRP', 'ssb-Index-RSRP', 'cri-RSRP-Index', or 'ssb-Index-RSRP-Index' and X μ According to the UE reported capability beamReportTiming, KB l If follows the capability beamSwitchTiming reported by the UE, then (Z(m),Z'(m)) is defined as (Z3,Z'3) in CSI calculation delay requirement 2.

[0250] - codebookType is set to 'typeII-CJT-r18' or 'typeII-CJT-PortSelection-r18' and the corresponding NZP-CSI-RS-ResourceSet for channel measurements is 1 < N TRP When configured with ≦4 resources, (Z(m), Z'(m)) is defined as (Z2, Z'2) or (Z2+r, Z'2+r) according to the capabilities reported by the UE, using (Z2, Z'2) in CSI calculation delay requirement 2.

[0251] - If CSI reporting is configured with N4=1, and codebookType is set to 'typeII-Doppler-r18' or 'typeII-Doppler-PortSelection-r18', and the corresponding NZP-CSI-RS-ResourceSet for channel measurement is aperiodic (AP) with K CSI-RS resources, then (Z(m), Z'(m)) is defined as (Z2+14(K-1)m, Z'2) using (Z2, Z'2) in CSI computation delay requirement 2.

[0252] - When CSI reporting is configured with N4=1, and codebookType is set to 'typeII-Doppler-r18' or 'typeII-Doppler-PortSelection-r18', and the corresponding NZP-CSI-RS-ResourceSet for channel measurement is periodic or semi-persistent (P or SP) with a single CSI-RS resource, then (Z(m),Z'(m)) is defined as (Z2+w,Z'2) using (Z2,Z'2) in CSI computation delay requirement 2.

[0253] - If CSI reporting is configured with N4>1 and codebookType is set to 'typeII-Doppler-r18' or 'typeII-Doppler-PortSelection-r18' and the corresponding NZP-CSI-RS-ResourceSet for channel measurement is aperiodic (AP) with K CSI-RS resources, then (Z(m),Z'(m)) is defined as (Z2+14(K-1)m,Z'2) or (Z2+14(K-1)m+r,Z'2+r) according to the capabilities reported by the UE, using (Z2,Z'2) in CSI computation delay requirement 2.

[0254] If CSI reporting is configured with N4>1, and codebookType is set to 'typeII-Doppler-r18' or 'typeII-Doppler-PortSelection-r18', and the corresponding NZP-CSI-RS-ResourceSet for channel measurement is periodic or semi-persistent (P or SP) with a single CSI-RS resource, then (Z(m),Z'(m)) is defined as (Z2+w,Z'2) according to the capabilities reported by the UE, using (Z2,Z'2) in CSI computation delay requirement 2. It is defined as (Z2+14(K-1)m,Z'2) or (Z2+14(K-1)m+r,Z'2+r) according to the capabilities reported by the UE.

[0255] - μ for CSI calculation delay requirements 1 and 2 is min(μ PDCCH ,μ CSI-RS ,μ UL ) where μ PDCCH μ corresponds to the subcarrier spacing of the PDCCH on which the DCI is transmitted. UL μ corresponds to the subcarrier spacing of the PUSCH over which the CSI report will be transmitted. CSI-RS corresponds to the minimum subcarrier spacing of the A-CSI-RS triggered by the DCI.

[0256] In improving the Rel. 18 Type 2 codebook for CJT multi-TRP, N TRPFor =1, (Z,Z') reuses the existing (Z,Z') value, and N TRP For capability 1, (Z,Z') reuses the existing (Z,Z') value, and for capability 2, (Z,Z') is the existing (Z,Z') value + r, and the value of r > 0 is the N that is configured. TRP It is being considered that the value may be dependent.

[0257] In this disclosure, Z ref , Z' ref (n), Z, Z', Z(m), Z'(m), the number of symbols from the end of the last symbol of the PDCCH that triggers a CSI report to the symbol at which UL transmission of that CSI report can begin, may be read interchangeably.

[0258] (Analysis) <Analysis 1> The CSI feedback is different for some ranks (rank = 2, 3, 4). For example, i 1,3 is selective feedback.

[0259] For different layers, the beams selected in W1 cannot be different. 1,1 , i 1,2 Based on the beam selected by i 1,3 By reporting, additional orthogonal beam (SD) bases for other layers can be selected.

[0260] For example, in the above-mentioned two-layer CSI reporting and codebook mode 1 codebook, the beam for the first layer is determined by l and m. 1,1 and i 1,2 The beam for the second layer is determined by l' and m'. l' and m' are determined by i 1,1 +k1 and i 1,2 +k2 respectively.

[0261] For several ranks (rank = 5, 6, 7, 8), from the precoding matrix W in the specification table, 1,3Even without additional feedback of , different orthogonal beam bases are defined for some other layers. For example, in the 8-layer CSI report and codebook for codebookMode=1-2 in Figure 15, beams for each layer are defined. For layers 1 and 2, beams l and m are defined as 1,1 and i 1,2 For layers 3 and 4, beams l' and m' are determined by i 1,1 +O1 and i 1,2 For layers 5 and 6, beams l'',m'',i 1,1 and i 1,2 +O2 respectively. For layers 7 and 8, beams l''',m''' are determined by i 1,1 +O1 and i 1,2 +O2 respectively.

[0262] Analysis 2: For different codebook modes (1 and 2), the PMI may be different.

[0263] In codebook mode 1, a beam for the wideband is selected from all N1N2O1O2 beams. The phase difference is considered for each subband. On the other hand, in codebook mode 2, a beam for the wideband is selected from N1O1 beams or N2O2 beams. Both the beam and the phase difference are selected for each subband. For example, in the above-mentioned one-layer CSI report and codebook of codebook mode 2, i indicating a wideband beam is 1,1 or i 1,2 are selected from half of the N1O1 beams or N2O2 beams, respectively. The i2 for the subband is added to the change of n for the phase difference, and the selected beam is (2i 1,1 ,2i 1,2 ),(2i 1,1 +1,2i 1,2 ),(2i 1,1 ,2i 1,2 +1),(2i 1,1 +1,2i 1,2 +1) can be changed.

[0264] <Analysis 3> For different ranks, there are different numbers of CSI-RS ports and different codebook (precoding matrix) structures.

[0265] Two different structures of W are considered for different ranks in different cases: the number of CSI-RS ports≦16 and the number of CSI-RS ports>16.

[0266] The structure A of W applied to ranks 1, 2, 5, 6, 7, 8 and ranks 3, 4 with the number of CSI-RS ports ≦16 may be given by the following equation J1:

[0267] In structure A, only the phase difference for the two polarizations is considered. In structure A, the number of rows of W is the number of CSI-RS ports, and the number of columns of W is the number of layers. For different layers, the N1N2-row, 1-column precoder v may be the same or different. For different layers, the phase difference φ may exist, may not exist, or may be -φ.

[0268] The structure B of W applied to ranks 3 and 4 with CSI-RS port numbers > 16 may be given by the following equation J2:

[0269] When the number of CSI-RS ports is large, W also provides the phase difference θ between the CSI-RS ports. This structure is a simplified method. Here, the beams selected for the first half of the ports and the beams selected for the second half of the ports are the same, and the phase difference θ between the first half of the ports and the second half of the ports is taken into account. This method is used when the number of CSI-RS ports is large. The precoder v ~ has N1N2 / 2 rows and 1 column.

[0270] <Analysis 4> The PMI may be different for at least one of different N2 values ​​(N2>1 and N2=1) and different n1-n2 (N1 and N2) values.

[0271] For N2=1, the oversampling factor is 1, and i 1,2For different n1-n2 values, in the case of different PMIs, the beam selected is the beam (i 1,1 ,i 1,2 ) is selected from among the N1O1 beams and a subset of the N2O2 beams. For example, in the above-mentioned 7-layer CSI reporting and codebook for codebookMode=1-2, for a particular value of n1-n2 (N1=4 and N2=1), beam i 1,1 is selected from a subset (half) of the N1O1 beams. For certain values ​​of n1-n2 (N1>2 and N2=2), beam i 1,2 is selected from a fraction (half) of the N2O2 beams. For a particular value of n1-n2 (N2=1), i 1,2 Report = 0.

[0272] <Analysis 5> In the existing CSI reporting based on the Type 1 codebook, when multiple CSI-RS resources are configured, the UE selects and reports one CRI, and reports the RI / LI / PMI / CQI corresponding to the reported CSI-RS resource (CRI).

[0273] In the case of hybrid beamforming, when a network (NW) attempts to perform multi-user (MU) pairing for a specific CSI-RS resource, the NW has CSI from multiple UEs for the same CSI-RS resource. If different UEs select and report different CSI-RS resources, it is difficult for the NW to perform MU pairing.

[0274] An extension of CRI-based reporting may involve selecting and reporting multiple CRIs and requesting multiple UEs to report the RI / LI / PMI / CQI corresponding to each selected CSI-RS resource (CRI).

[0275] There are several issues to consider: Issue 1: How to configure and report multiple CRIs in one CSI direction. For example, the bit size for multiple CRIs. Issue 2: How to determine the mapping order of multiple CSIs corresponding to multiple CRIs. Issue 3: Are there any relationships / restrictions for multiple CSIs corresponding to multiple CRIs? Issue 4: How to configure zero power (ZP)-interference measurement resource (IMR) / non-zero power (NZP)-IMR.

[0276] (Considerations) Targeting FR1, a CSI that supports up to 128 CSI-RS ports is being considered. Specifically, the following items are being considered: ◆ Item a: An improvement to the Type 1 codebook that supports up to a total of 128 CSI-RS ports across all resources, based on an extension of the existing codebook and assuming existing CSI-RS resources (with up to 32 CSI-RS ports per resource). ◆ Item b: An improvement to the Type 2 codebook that supports up to a total of 128 CSI-RS ports across all resources, based on an extension of the existing codebook and assuming existing CSI-RS resources (with up to 32 CSI-RS ports per resource), without changing any codebook parameters other than the introduction of an additional value for the codebook parameter for the number of ports. ◆Item c: 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 32 CSI-RS ports per resource and up to 128 total CSI-RS ports across all resources without new codebook design.

[0277] However, there has been insufficient consideration given to a method for setting / reporting CSI to support more than 32 CSI-RS ports, and if such a method is not given sufficient consideration, there is a risk that communication quality / throughput will deteriorate.

[0278] Therefore, the inventors have studied methods for setting / reporting CSI and have come up with the following embodiments.

[0279] 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.

[0280] (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.

[0281] 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."

[0282] 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.

[0283] 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.

[0284] 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.

[0285] 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.

[0286] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0287] 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 for i = M, M+1, ..., M+N-1 i Summation of 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 k values ​​selected from n values ​​(combinatorial coefficient), binomial coefficients, n C k , C n k In the present disclosure, x / y and floor(x / y) may be read as interchangeable.

[0288] 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 minus sign (-) on top of the x, or may be referred to as an x-bar. ＾ may be represented by placing a ^ above the x, and may be called an x-hat.

[0289] 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.

[0290] In this disclosure, the following abbreviations may be used: FDM: frequency division multiplexing TDM: time division multiplexing

[0291] In the present disclosure, the terms indicate, report, and select may be read interchangeably.

[0292] 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.

[0293] 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.

[0294] 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.

[0295] In the present disclosure, the terms "existing (N1, N2)," "(N1, N2) for the number of existing ports," "setting of a two-dimensional antenna arrangement for 32 or fewer ports," and "first setting regarding a two-dimensional arrangement of multiple antennas for 32 or fewer ports" may be interchangeable. In the present disclosure, the terms "new (N1, N2)," "(N1, N2) for the number of expansion ports," "setting of a two-dimensional antenna arrangement for more than 32 ports," and "second setting regarding 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.

[0296] 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.

[0297] 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.

[0298] 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.

[0299] In the present disclosure, CSI-RS resources for an extended port number, new port CSI-RS resources, 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.

[0300] 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.

[0301] 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.

[0302] 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.

[0303] 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.

[0304] 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.

[0305] 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.

[0306] 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.

[0307] 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.

[0308] (Wireless communication method) A UE may calculate one or more CSIs by measuring one or more CSI-RSs (resources) using an antenna port to which at least one embodiment is applied based on a CSI reporting configuration (CSI-ReportConfig), and may report the one or more CSIs.

[0309] (Embodiment A) <Consideration A> It may be difficult to share the same CSI-RS resources between an existing CSI-RS (e.g., up to 32 ports in Rel. 15-18) and a new CSI-RS (e.g., more than 32 ports in Rel. 19). Because existing UEs cannot despread the new TD-OCC / FD-OCC, the base station needs to configure separate sets of CSI-RS resources for existing (e.g., Rel. 15-18) UEs and new (e.g., Rel. 19) UEs. This causes CSI-RS overhead. Attempts to reduce the CSI-RS overhead may limit performance improvements for more than 32 CSI-RS ports.

[0310] <Embodiment A1> More than 32 ports may not be introduced for the same CSI-RS resource (time and frequency resource), and different CSI-RS resources may use different CSI-RS ports. Multiple CSI-RS resources may be aggregated for a new UE.

[0311] For example, two CSI-RS resources may be configured, with the first CSI-RS resource associated with CSI-RS ports #0 to #31 and the second CSI-RS resource associated with CSI-RS ports #32 to #63. In this case, it is easy to share the CSI-RS resources between the existing UE and the new UE. For example, only the first CSI-RS resource may be configured for the existing UE, and both the first and second CSI-RS resources may be configured for the new UE.

[0312] According to this embodiment A1, by changing the definition of the CSI-RS port mapping, it is possible to define more than 32 CSI-RS ports, and the impact on the specifications can be reduced.

[0313] As in the example of Figure 16, CSI-RS resource #1 and CSI-RS resource #2 may be configured to be FDM-modulated, with CSI-RS resource #1 associated with CSI-RS ports #0 to #31 and CSI-RS resource #2 associated with CSI-RS ports #32 to #63.

[0314] As in the example of Figure 17, TDM CSI-RS resource #1 and CSI-RS resource #2 may be configured, CSI-RS resource #1 may be associated with CSI-RS ports #0 to #31, and CSI-RS resource #2 may be associated with CSI-RS ports #32 to #63.

[0315] The size of the time resource of each CSI-RS resource may be slot / subslot / subframe. The size of the frequency resource of each CSI-RS resource may be PRB / 2 N Alternatively, the number of consecutive PRBs may be N (N=-2, -1, 1, 2, ...).

[0316] A method for mapping more than 32 CSI-RS ports across multiple CSI-RS resources may be according to at least one of several embodiments A1-X below.

[0317] <<Embodiment A1-1>> When a UE is configured with higher layer parameters enabling more than 32 CSI-RS ports and with x CSI-RS ports and y CSI-RS resources, the UE may map the CSI-RS ports according to at least one of the following rules. x may be less than or equal to 32. - The first resource of the y CSI-RS resources (or a CSI-RS resource set) is mapped to CSI-RS ports #0 to #x-1. - The second resource of the y CSI-RS resources (or a CSI-RS resource set) is mapped to CSI-RS ports #x to #2x-1. - The third resource of the y CSI-RS resources (or a CSI-RS resource set) is mapped to CSI-RS ports #2x to #3x-1. The i-th resource in the y CSI-RS resources (or CSI-RS resource set) is mapped to CSI-RS ports #(i-1)x to #ix-1, where the i-th resource may be the CSI-RS resource corresponding to the i-th time resource (e.g., slot) or the CSI-RS resource corresponding to the i-th frequency resource (e.g., PRB).

[0318] <<Embodiment A1-2>> Multiple aggregated CSI-RS resources may be associated with more than 32 CSI-RS ports. Each CSI-RS resource may be associated with 32 or fewer CSI-RS ports. The multiple CSI-RS resources for aggregation may comply with at least one constraint from several of the following options: - Option 1: The number of CSI-RS resources for aggregation is M. For example, M may be 2. - Option 2: The number of ports associated with each CSI-RS resource for aggregation is fixed to N or is greater than O (equal to or greater than O). For example, N may be 32. For example, O may be 16. - Option 3: Multiple CSI-RS resources for aggregation are configured within the same CSI-RS resource set or CSI-RS resource group. - Option 4: Multiple CSI-RS resources for aggregation may have the same configuration of at least one of density, number of ports, time operation setting, frequency resource allocation, time resource allocation, QCL assumption, scrambling ID, and new scrambling ID. The time operation setting may indicate a P, SP, or AP. The frequency resource allocation may be at the wideband level or the RB level. The wideband level may be the number of PRBs and the starting PRB. The time resource allocation may be at the slot level. The QCL assumption may be an associated SSB. Multiple CSI-RS resources for aggregation may have different configurations of at least one of time resource allocation, frequency resource allocation, and scrambling ID. - Option 5: Multiple CSI-RS resources for aggregation may be located in M ​​or fewer consecutive slots or in consecutive / comb-like frequency resources. Example: M=2 CSI-RS resources may be aggregated and associated with 64 CSI-RS ports, and each CSI-RS resource may be associated with 32 CSI-RS ports.The two CSI-RS resources are in the same CSI-RS resource set or CSI-RS resource group, have the same frequency resource configuration, and are respectively arranged in two consecutive slots.

[0319] <<Embodiment A1-3>> In an aggregated multiple CSI-RS resource having more than 32 ports, some parameters may be additionally configured or existing parameters may be overwritten. For example, the some parameters may be at least one of density, new scrambling ID, number of PRBs, and starting PRB. To reduce the complexity of UE measurements, a density smaller than the existing density may be configured.

[0320] ((Embodiment B)) <Consideration B> The base station antenna layout and settings for more than 32 CSI-RS ports have not been sufficiently considered.

[0321] <Embodiment B1> A novel antenna layout and configuration for CSI-RS using more than 32 ports may follow at least one of the following options.

[0322] - Option 1: A new (N1,N2) and a new (O1,O2) may be defined in the specification and configured in the UE. A new row may be added to the existing table. The new row may be used only if a CSI-RS with more than 32 ports for the CSI codebook is configured. A new table separate from the existing table may be added. The new table may be used only if a CSI-RS with more than 32 ports for the CSI codebook is configured, otherwise the existing table may be used.

[0323] 18 shows an example of a configuration according to Option 1 of embodiment B1. At least one row in this table may be supported. This table shows multiple combinations (rows) of the number of CSI-RS ports (>32), (N1, N2), and (O1, O2).

[0324] - Option 2 (similar to the setting for multi-panel), N is combined with at least one value of existing (N1,N2) and existing (O1,O2). g A new parameter ng indicating the parameter ng may be added to the configuration. The new configuration may be defined in the specification and configured to the UE.

[0325] N g may be set as a separate parameter from the (N1, N2) setting. For example, N g Two parameters ng and n1-n2 may be set, which respectively indicate the number of CSI-RS ports (>32) and (N1, N2). Figure 19 shows a first example of the setting according to option 2 of embodiment B1. At least one combination in this table may be supported. This table specifies the number of CSI-RS ports (>32) and N g This shows multiple combinations of existing (N1,N2) and (O1,O2). Different (N1,N2) may be included in separate lines. As with the example of Option 1, different (O1,O2) for different (N1,N2) may be different. Lines marked with * may not be needed by reusing existing settings for many ports.

[0326] N g may be set as a new parameter joint with the (N1,N2) setting. For example, (N g , N1, N2) may be configured. FIG. 20 shows a second example of the configuration according to option 2 of embodiment B1. At least one row in this table may be supported. This table specifies the number of CSI-RS ports (>32) and the number of new (N g ,N1,N2) and (O1,O2). For the * lines, by reusing the existing settings of many ports, the * lines may not be needed.

[0327] The UE is g It may be appreciated that only one dimension is extended by a value. As an example of FIG. 21A, an antenna layout for 64 ports (N g,N1,N2)=(2,8,2) may mean two antenna layouts (N1,N2)=(8,2) in the horizontal direction. g ,N1,N2)=(4,8,2) may mean a four antenna layout (N1,N2)=(8,2) in the horizontal direction. In these examples, the spacing between two adjacent antenna elements in the horizontal or vertical direction is d.

[0328] - Option 3 (N1, N2) combined with at least one value of existing (O1, O2) g1 ,N g2 A new parameter ng1-ng2 indicating the number of times the UE is connected to the UE may be added to the configuration. The new configuration may be defined in the specification and configured to the UE.

[0329] (N g1 ,N g2 ) may be set as a separate parameter from the (N1, N2) setting. For example, (N g1 ,N g2 Two parameters ng1-ng2 and n1-n2 may be set, which respectively indicate the number of CSI-RS ports (>32) and (N g1 ,N g2 ), existing (N1,N2), and (O1,O2) are shown as multiple combinations. For the lines marked with *, by reusing the settings of many existing ports, the lines marked with * may not be needed.

[0330] (N g1 ,N g2 ) may be set as a new parameter joint with the (N1,N2) setting. For example, (N g1 ,N g2, N1, N2) may be configured. FIG. 23 shows a second example of the configuration according to option 3 of embodiment B1. At least one row in this table may be supported. This table specifies the number of CSI-RS ports (>32) and the number of new (N g1 ,N g2 ,N1,N2) and (O1,O2). For the * lines, by reusing the existing settings of many ports, the * lines may not be needed.

[0331] The UE is (N g1 ,N g2 ) values ​​may be recognized as extending two dimensions. g1 may correspond to N1 (horizontal direction), and N g2 may correspond to N2 (vertical direction). As an example of FIG. 24A, the antenna layout for 128 ports (N g1 ,N g2 ,N1,N2)=(2,2,8,2) may mean an antenna layout (N1,N2)=(8,2) with two horizontal and two vertical antennas. g1 ,N g2 ,N1,N2)=(4,1,8,2) may mean an antenna layout (N1,N2)=(8,2) with four horizontal and one vertical antenna elements. In these examples, the spacing between two horizontally or vertically adjacent antenna elements is d.

[0332] <<Variations>> The values ​​of (O1,O2) for each value of (N1,N2) may be defined in the specification or may be configurable. The values ​​of (O1,O2) may follow at least one of the following options: - Option 1: The values ​​of (O1,O2) are common to all ranks (number of layers). - Option 2: The values ​​of (O1,O2) are different for different ranks. For example, for lower ranks, (O1,O2) have larger values, and for higher ranks, (O1,O2) have smaller values. For example, when (N1,N2)=(16,2), (O1,O2)=(4,4) for ranks 1 to 2, and (O1,O2)=(1,1) for ranks 3 to 8.

[0333] According to this embodiment B1, the UE can be appropriately configured with a base station antenna layout for CSI-RS that uses more than 32 ports.

[0334] ((Embodiment C)) <Consideration C> It is considered that CSI-RS resources for more than 32 ports will not be directly designed and transmitted. Instead, it is considered that multiple existing CSI-RS resources, each with up to 32 CSI-RS ports, will be used for measurements.

[0335] However, the method for mapping / associating each existing CSI-RS resource to a gNB antenna from the antenna configuration (N1, N2) has not been fully considered, which would lead to different UE behaviors regarding how to perform CSI calculations based on measurements of multiple CSI-RS resources. This association ensures that the gNB and UE have the same understanding of the reported SD beam.

[0336] The following three mappings / associations between factors A, B, and C are possible: ◆ Factor A: Port of CSI-RS resource ◆ Factor B: Indexing of port of extended port number ◆ Factor C: Position within new (N1, N2).

[0337] Embodiment A1 shows the association between factors A and B.

[0338] <Embodiment C1> Embodiment C1 relates to the generation of 128 ports.

[0339] To generate 128 ports, four 32-port CSI-RS resources (existing CSI-RS resources) may be configured to be transmitted, and the four 32-port CSI-RS resources may be TDM'd within the same slot or consecutive slots.

[0340] For each port of the transmitted 32-port CSI-RS, the mapping / association to a gNB antenna in the antenna configuration may be defined in the specification using the existing (N1, N2) configuration for the 32 ports or a new (N g1 ,N g2 ) configuration. The mapping / association may be based on at least one of several options:

[0341] ◆ Option 1: Association of 32-port CSI-RS to multiple antennas considers only the existing (N1, N2) for 32 ports. The existing (N1, N2) may be, for example, (4, 4), (8, 2), or (16, 1).

[0342] ◆ Option 2: The association of a 32-port CSI-RS to multiple antennas is not limited to the existing (N1, N2) for 32 ports. Any rule defined in the specification may be considered. ◆ For example, the association may first map the 32 ports to gNB antennas in the horizontal domain dimension and then map them to gNB antennas in the vertical dimension, or the association may first map the 32 ports to gNB antennas in the vertical domain dimension and then map them to gNB antennas in the horizontal dimension. ◆ For example, the association may first map the 32 ports to the 1st, (1 + d)th, ... gNB antennas in the horizontal dimension and then map them to the 2nd, (2 + d)th, ... gNB antennas in the vertical dimension, or the association may first map the 32 ports to the 1st, (1 + d)th, ... gNB antennas in the vertical dimension and then map them to the 2nd, (2 + d)th, ... gNB antennas in the horizontal dimension. -◆The association may map the 32 ports to multiple gNB antennas according to other rules.

[0343] For each port of one CSI-RS and antenna position within the existing (N1, N2), the existing rules may be applied / transferred to each embodiment for port mapping within each existing (N1, N2).

[0344] The following several new (N1, N2) configurations for 128 ports may be supported:

[0345] ◆ New (64,1) Configuration for 128 Ports If this configuration is supported, at least one rule from the following options may be defined: ◆ Option 1-a: Each 32-port CSI-RS resource may be defined to be associated with an existing (16,1) antenna using a specific order. In the example of FIG. 25A, four 32-port CSI-RSs are mapped to four (16,1) antennas arranged in the horizontal domain. As in the example of FIG. 25B, the four 32-port CSI-RSs may be TDM. The indexing of ports within the existing (N1,N2) = (16,1) of the 32-port CSI-RS may follow existing rules. The mapping of each CSI-RS port to a gNB antenna within the existing (N1,N2) may follow existing rules. The existing rules map ports first to antennas of one polarization and then to antennas of the other polarization. For example, of the 32 ports, ports 0 through 15 may be mapped to a horizontally polarized antenna in (16,1), and ports 16 through 31 may be mapped to a vertically polarized antenna in (16,1).

[0346] ◆ New (16,4) setting for 128 ports If this setting is supported, at least one rule of the following options may be defined:

[0347] Option 1-a: Each 32-port CSI-RS may be defined to be associated with an existing (4,4) antenna using a specific order. In the example of Figure 26A, four 32-port CSI-RSs are mapped to four (4,4) antennas. The four (4,4) antennas are arranged in the horizontal domain.

[0348] -◆Option 1-b: Each 32-port CSI-RS may be defined to be associated with an existing (8,2) antenna using a specific order. In the example of Figure 26B, four 32-port CSI-RSs are mapped to four (8,2) antennas. Of the four (8,2) antennas, two (8,2) antennas are arranged in the vertical domain and then in the horizontal domain.

[0349] Option 1-c: Each 32-port CSI-RS may be defined to be associated with an existing (16,1) antenna using a specific order. In the example of Figure 26C, four 32-port CSI-RSs are mapped to four (16,1) antennas. The four (16,1) antennas are arranged in the vertical domain.

[0350] -◆Option 1-d: Associations between (4,4), (8,2), and (16,1) and at least one existing (N1,N2) are supported, and a new (N g1 ,N g2 ) and the existing (N1,N2) for 32 ports. In the example of FIG. 27, the existing (N1,N2) of (4,4), (8,2), and (16,1) are specified / set by the new (N1,N2) of (4,1), (2,2), and (1,4). g1 ,N g2 ) are associated with each other.

[0351] -◆Option 2-a: The rule is that each CSI-RS is associated with multiple antennas distributed in the horizontal domain. In the example of Figure 28, the first CSI-RS is associated with antennas (1, 5, 9, 13) in the horizontal domain and antennas (1st to 4th) in the vertical domain. The second CSI-RS is associated with antennas (2, 6, 10, 14) in the horizontal domain and antennas (1st to 4th) in the vertical domain. The third CSI-RS is associated with antennas (3, 7, 11, 15) in the horizontal domain and antennas (1st to 4th) in the vertical domain. The fourth CSI-RS is associated with antennas (4, 8, 12, 16) in the horizontal domain and antennas (1st to 4th) in the vertical domain. If i = 1, 2, 3, 4 and j = 1, 2, 3, 4, the i-th CSI-RS is associated with the i+4(j-1)th antenna in the horizontal domain and the 1st to 4th antennas in the vertical domain.

[0352] -◆The antenna arrangement is not limited to the above example. The number of antennas arranged in the horizontal domain and the number of antennas arranged in the vertical domain may be reversed.

[0353] - For different associations, the measurements at the UE and the method of calculating the complete channel / CSI based on the four measurements may be different.

[0354] -◆When the channel variations in the four CSI-RS resources at different timings are considered, the performance of each association method (rule) may also be different.

[0355] ◆ New (32,2) setting for 128 ports If this setting is supported, at least one rule of the following options may be defined:

[0356] -◆Option 1-a: Each 32-port CSI-RS may be defined to be associated with an existing (8,2) antenna using a specific order.

[0357] -◆Option 1-b: Each 32-port CSI-RS may be defined to be associated with an existing (16,1) antenna using a specific order.

[0358] -◆Option 1-c: The association between (8,2) and (16,1) and at least one existing (N1,N2) is supported, and a new (N g1 ,N g2 ) and the existing (N1, N2) for 32 ports.

[0359] -◆Option 2-a: The rule is not limited to the existing (N1,N2) of (8,2) and (16,1).

[0360] ◆ New (8,8) setting for 128 ports If this setting is supported, at least one rule of the following options may be defined:

[0361] -◆Option 1-a: Each 32-port CSI-RS may be defined to be associated with an existing (4,4) antenna using a specific order.

[0362] -◆Option 1-b: Each 32-port CSI-RS may be defined to be associated with an existing (8,2) antenna using a specific order.

[0363] -◆Option 1-c: Each 32-port CSI-RS may be defined to be associated with an existing (16,1) antenna using a specific order.

[0364] -◆Option 1-d: Associations between (4,4), (8,2), and (16,1) and at least one existing (N1,N2) are supported, and a new (N g1 ,N g2 ) and the existing (N1, N2) for 32 ports.

[0365] -◆Option 2-a: The rule is not limited to the existing (N1,N2) of (4,4), (8,2) and (16,1).

[0366] 29 shows an example of association candidates considering 32 existing ports (N1, N2) in Option 1. As described above, this example is based on the number of CSI-RS antenna ports, 128, new (N1, N2), existing (N1, N2), and new (N g1 ,N g2 ) and . Only a subset of the associations in this example may be supported or configurable.

[0367] According to embodiment C1, multiple CSI-RSs, each using 32 or fewer ports, can be appropriately mapped / associated to multiple gNB antennas, and 128 CSI-RS ports can be appropriately utilized.

[0368] <Embodiment C2> Embodiment C2 relates to the generation of 96 ports.

[0369] At least one of the following embodiments C2-1 and C2-2 may be supported: At least one of the following embodiments C2-1 and C2-2 may be configurable.

[0370] <<Embodiment C2-1>> To generate 96 ports, three 32-port CSI-RS resources (existing CSI-RS resources) may be configured to be transmitted, and the three 32-port CSI-RS resources may be TDM'd within the same slot or multiple consecutive slots.

[0371] For each port of the transmitted 32-port CSI-RS, the mapping / association to a gNB antenna in the antenna configuration may be defined in the specification using the existing (N1, N2) configuration for the 32 ports or a new (N g1 ,N g2 ) configuration. The mapping / association may be based on at least one of several options:

[0372] ◆ Option 1: Association of 32-port CSI-RS to multiple antennas considers only the existing (N1, N2) for 32 ports. The existing (N1, N2) may be, for example, (4, 4), (8, 2), or (16, 1).

[0373] ◆ Option 2: The association of a 32-port CSI-RS to multiple antennas is not limited to the existing (N1, N2) for 32 ports. Any rule defined in the specification may be considered. ◆ For example, the association may first map the 32 ports to gNB antennas in the horizontal domain dimension and then map them to gNB antennas in the vertical dimension, or the association may first map the 32 ports to gNB antennas in the vertical domain dimension and then map them to gNB antennas in the horizontal dimension. ◆ For example, the association may first map the 32 ports to the 1st, (1 + d)th, ... gNB antennas in the horizontal dimension and then map them to the 2nd, (2 + d)th, ... gNB antennas in the vertical dimension, or the association may first map the 32 ports to the 1st, (1 + d)th, ... gNB antennas in the vertical dimension and then map them to the 2nd, (2 + d)th, ... gNB antennas in the horizontal dimension. -◆The association may map the 32 ports to multiple gNB antennas according to other rules.

[0374] For each port of one CSI-RS and antenna position within the existing (N1, N2), the existing rules may be adapted or may be applied to the below-described embodiments for port mapping within each existing (N1, N2).

[0375] 30 shows an example of association candidates considering 32 existing ports (N1, N2) in Option 1. This example shows 96 CSI-RS antenna ports, new (N1, N2), existing (N1, N2), and new (N g1 ,N g2 ) and . Only a subset of the associations in this example may be supported or configurable.

[0376] New (N1,N2) = (12,4), Existing (N1,N2) = (4,4), New (N g1 ,N g2 In the case where (3,1) = (3,1), as in this example, three CSI-RSs may be associated with (4,4) antennas arranged in the horizontal domain, respectively.

[0377] <<Embodiment C2-2>> To generate 96 ports, four 24-port CSI-RS resources (existing CSI-RS resources) may be configured to be transmitted, and the four 24-port CSI-RS resources may be TDM'd within the same slot or multiple consecutive slots.

[0378] For each port of the transmitted 24-port CSI-RS, the mapping / association to a gNB antenna in the antenna configuration may be defined in the specification using the existing (N1, N2) configuration for the 24 ports or a new (N g1 ,N g2 ) configuration. The mapping / association may be based on at least one of several options:

[0379] ◆ Option 1: Association of 24-port CSI-RS to multiple antennas considers only the existing (N1, N2) for 24 ports. The existing (N1, N2) may be, for example, (4, 3), (6, 2), or (12, 1).

[0380] ◆ Option 2: The association of a 24-port CSI-RS to multiple antennas is not limited to the existing (N1, N2) for 24 ports. Any rule defined in the specification may be considered. ◆ For example, the association may first map the 24 ports to gNB antennas in the horizontal domain dimension and then map them to gNB antennas in the vertical dimension, or the association may first map the 24 ports to gNB antennas in the vertical domain dimension and then map them to gNB antennas in the horizontal dimension. ◆ For example, the association may first map the 24 ports to the 1st, (1 + d)th, ... gNB antennas in the horizontal dimension and then map them to the 2nd, (2 + d)th, ... gNB antennas in the vertical dimension, or the association may first map the 24 ports to the 1st, (1 + d)th, ... gNB antennas in the vertical dimension and then map them to the 2nd, (2 + d)th, ... gNB antennas in the horizontal dimension. -◆The association may map the 24 ports to multiple gNB antennas according to other rules.

[0381] For each port of one CSI-RS and antenna position within the existing (N1, N2), the existing rules may be adapted or may be applied to the below-described embodiments for port mapping within each existing (N1, N2).

[0382] 31 shows an example of association candidates considering 24 existing ports (N1, N2) in Option 1. This example shows the number of CSI-RS antenna ports, 96, new (N1, N2), existing (N1, N2), and new (N g1 ,N g2 ) and . Only a subset of the associations in this example may be supported or configurable.

[0383] New (N1,N2) = (12,4), Existing (N1,N2) = (12,1), New (N g1 ,N g2 In the case where r = (1,4), as in this example, four CSI-RS may be associated with four (12,1) antennas arranged in the horizontal domain, respectively.

[0384] New (N1,N2) = (12,4), Existing (N1,N2) = (6,2), New (N g1 ,N g2 In the case where ≡(R,R)=(2,2), as in this example, of the four CSI-RSs, first two CSI-RSs may be associated with the vertical domain and then with the horizontal domain.

[0385] According to embodiment C2, multiple CSI-RSs, each using 32 or fewer ports, can be appropriately mapped / associated to multiple gNB antennas, and 96 CSI-RS ports can be appropriately utilized.

[0386] Embodiment C3 relates to generating 72 ports. To generate 72 ports, three 24-port CSI-RS resources (existing CSI-RS resources) may be configured to be transmitted. The three 24-port CSI-RS resources may be TDM'd within the same slot or multiple consecutive slots.

[0387] For each port of the transmitted 24-port CSI-RS, the mapping / association to a gNB antenna in the antenna configuration may be defined in the specification using the existing (N1, N2) configuration for the 24 ports or a new (N g1 ,N g2 ) configuration. The mapping / association may be based on at least one of several options:

[0388] ◆ Option 1: Association of 24-port CSI-RS to multiple antennas considers only the existing (N1, N2) for 24 ports. The existing (N1, N2) may be, for example, (4, 3), (6, 2), or (12, 1).

[0389] ◆ Option 2: The association of a 24-port CSI-RS to multiple antennas is not limited to the existing (N1, N2) for 24 ports. Any rule defined in the specification may be considered. ◆ For example, the association may first map the 24 ports to gNB antennas in the horizontal domain dimension and then map them to gNB antennas in the vertical dimension, or the association may first map the 24 ports to gNB antennas in the vertical domain dimension and then map them to gNB antennas in the horizontal dimension. ◆ For example, the association may first map the 24 ports to the 1st, (1 + d)th, ... gNB antennas in the horizontal dimension and then map them to the 2nd, (2 + d)th, ... gNB antennas in the vertical dimension, or the association may first map the 24 ports to the 1st, (1 + d)th, ... gNB antennas in the vertical dimension and then map them to the 2nd, (2 + d)th, ... gNB antennas in the horizontal dimension. -◆The association may map the 24 ports to multiple gNB antennas according to other rules.

[0390] For each port of one CSI-RS and antenna position within the existing (N1, N2), the existing rules may be adapted or may be applied to the below-described embodiments for port mapping within each existing (N1, N2).

[0391] 32 shows an example of association candidates considering 24 existing ports (N1, N2) in Option 1. This example shows the number of CSI-RS antenna ports, 72, new (N1, N2), existing (N1, N2), and new (N g1 ,N g2 ) and . Only a subset of the associations in this example may be supported or configurable.

[0392] New (N1,N2) = (12,3), Existing (N1,N2) = (12,1), New (N g1 ,N g2 In the case where r = (1,3), as in this example, three CSI-RS may be associated with three (12,1) antennas arranged in the vertical domain, respectively.

[0393] New (N1,N2) = (12,3), Existing (N1,N2) = (4,3), New (N g1 ,N g2 In the case where r = (3,1), as in this example, three CSI-RS may be associated with three (4,3) antennas arranged in the horizontal domain, respectively.

[0394] For the new (N1,N2) = (9,4), it may not be possible to map to the existing 24-port (N1,N2) = (4,3), (6,2), or (12,1). For the new (N1,N2) = (9,4), at least one of the following options may be defined: ◆ Option a: For 72 ports, the new (N1,N2) = (9,4) antenna configuration is not supported. ◆ Option b: The association of the 24-port CSI-RS follows the other rules of Option 2. ◆ Option c: A 12-port CSI-RS is considered. That is, six 12-port CSI-RS may be configured to be transmitted. The six 12-port CSI-RS resources may be TDM'd within the same slot or multiple consecutive slots. Each CSI-RS resource may be TDM'd within the new (N g1 ,N g2 ) = (3,2) may be used to associate with the existing (N1,N2) = (3,2) antenna.

[0395] According to embodiment C3, multiple CSI-RSs, each using 32 or fewer ports, can be appropriately mapped / associated to multiple gNB antennas, and 72 CSI-RS ports can be appropriately utilized.

[0396] Embodiment C4 relates to the generation of 64 ports. To generate 64 ports, two 32-port CSI-RS resources (existing CSI-RS resources) may be configured to be transmitted. The two 32-port CSI-RS resources may be TDM'd within the same slot or multiple consecutive slots.

[0397] For each port of the transmitted 32-port CSI-RS, the mapping / association to a gNB antenna in the antenna configuration may be defined in the specification using the existing (N1, N2) configuration for the 32 ports or a new (N g1 ,N g2 ) configuration. The mapping / association may be based on at least one of several options:

[0398] ◆ Option 1: Association of 32-port CSI-RS to multiple antennas considers only the existing (N1, N2) for 32 ports. The existing (N1, N2) may be, for example, (4, 4), (8, 2), or (16, 1).

[0399] ◆ Option 2: The association of a 32-port CSI-RS to multiple antennas is not limited to the existing (N1, N2) for 32 ports. Any rule defined in the specification may be considered. ◆ For example, the association may first map the 32 ports to gNB antennas in the horizontal domain dimension and then map them to gNB antennas in the vertical dimension, or the association may first map the 32 ports to gNB antennas in the vertical domain dimension and then map them to gNB antennas in the horizontal dimension. ◆ For example, the association may first map the 32 ports to the 1st, (1 + d)th, ... gNB antennas in the horizontal dimension and then map them to the 2nd, (2 + d)th, ... gNB antennas in the vertical dimension, or the association may first map the 32 ports to the 1st, (1 + d)th, ... gNB antennas in the vertical dimension and then map them to the 2nd, (2 + d)th, ... gNB antennas in the horizontal dimension. -◆The association may map the 32 ports to multiple gNB antennas according to other rules.

[0400] For each port of one CSI-RS and antenna position within the existing (N1, N2), the existing rules may be adapted or may be applied to the below-described embodiments for port mapping within each existing (N1, N2).

[0401] 33 shows an example of association candidates considering 32 existing ports (N1, N2) in Option 1. This example shows the number of CSI-RS antenna ports as 64, new (N1, N2), existing (N1, N2), and new (N g1 ,N g2 ) and . Only a subset of the associations in this example may be supported or configurable.

[0402] New (N1,N2) = (8,4), Existing (N1,N2) = (8,2), New (N g1 ,N g2 In the case where (8,2) = (1,2), as in this example, two CSI-RS may be associated with two (8,2) antennas respectively arranged in the vertical domain.

[0403] New (N1,N2) = (8,4), Existing (N1,N2) = (4,4), New (N g1 ,N g2 In the case where (r, r) = (2, 1), as in this example, two CSI-RS may be associated with two (4, 4) antennas respectively arranged in the horizontal domain.

[0404] According to embodiment C4, multiple CSI-RSs, each using 32 or fewer ports, can be appropriately mapped / associated to multiple gNB antennas, and 64 CSI-RS ports can be appropriately utilized.

[0405] Embodiment C5 relates to the generation of 48 ports. To generate 48 ports, two 24-port CSI-RS resources (existing CSI-RS resources) may be configured to be transmitted. The two 24-port CSI-RS resources may be TDM'd within the same slot or multiple consecutive slots.

[0406] For each port of the transmitted 24-port CSI-RS, the mapping / association to a gNB antenna in the antenna configuration may be defined in the specification using the existing (N1, N2) configuration for the 24 ports or a new (N g1 ,N g2) configuration. The mapping / association may be based on at least one of several options:

[0407] ◆ Option 1: Association of 24-port CSI-RS to multiple antennas considers only the existing (N1, N2) for 24 ports. The existing (N1, N2) may be, for example, (4, 3), (6, 2), or (12, 1).

[0408] ◆ Option 2: The association of a 24-port CSI-RS to multiple antennas is not limited to the existing (N1, N2) for 24 ports. Any rule defined in the specification may be considered. ◆ For example, the association may first map the 24 ports to gNB antennas in the horizontal domain dimension and then map them to gNB antennas in the vertical dimension, or the association may first map the 24 ports to gNB antennas in the vertical domain dimension and then map them to gNB antennas in the horizontal dimension. ◆ For example, the association may first map the 24 ports to the 1st, (1 + d)th, ... gNB antennas in the horizontal dimension and then map them to the 2nd, (2 + d)th, ... gNB antennas in the vertical dimension, or the association may first map the 24 ports to the 1st, (1 + d)th, ... gNB antennas in the vertical dimension and then map them to the 2nd, (2 + d)th, ... gNB antennas in the horizontal dimension. -◆The association may map the 24 ports to multiple gNB antennas according to other rules.

[0409] For each port of one CSI-RS and antenna position within the existing (N1, N2), the existing rules may be adapted or may be applied to the below-described embodiments for port mapping within each existing (N1, N2).

[0410] 34 shows an example of association candidates considering 24 existing ports (N1, N2) in Option 1. This example shows the number of CSI-RS antenna ports: 48, new (N1, N2), existing (N1, N2), and new (N g1 ,N g2) and . Only a subset of the associations in this example may be supported or configurable.

[0411] According to embodiment C5, multiple CSI-RSs, each using 32 or fewer ports, can be appropriately mapped / associated to multiple gNB antennas, and 48 CSI-RS ports can be appropriately utilized.

[0412] <Variation 1 of Embodiment C> For an extension port number exceeding 32, multiple CSI-RS resources having an existing port number smaller than the port number in embodiments C1 to C4 may be configured. The extension port number may include, for example, at least one of 48, 64, 72, 96, and 128. The existing port number may include, for example, at least one of 12 and 16. Association of gNB antennas using CSI-RS resources for the existing port number may take into account the existing (N1, N2) setting of the existing port number.

[0413] If more CSI-RS resources are used (using the existing number of ports per CSI-RS resource), they need to be transmitted for a longer time period, which makes the measurement results less accurate due to the varying channel during that time period, and also makes the UE measurements more complex.

[0414] <Variation 2 of Embodiment C> With regard to the factors A, B, and C described above, embodiment A1 shows the association between factors A and B, and embodiments C1 to C5 show the association between factors A and C.

[0415] <<Variation 2A>> An association between factors A and C may be defined / established. This association may be combined with the association between factors A and B in embodiment A1. The association between factors A and C may be based on at least one of several options:

[0416] ◆ Option 1: At each position in the new (N1, N2), the ports may be indexed first into the horizontal domain, then into the vertical domain, and then into the polarization domain. In the indexing, the order of the horizontal domain, the vertical domain, and the polarization domain may be other orders. The ports may be from 0 to X-1 or from 1 to X. For example, X may be 128 / 96 / 72 / 64 / 48.

[0417] ◆ Option 2: At each position in the new (N1, N2), g1 ,N g2 ) and existing (N1, N2) may be set. New (N g1 ,N g2 ) by N g1 ×N g2 The ports may be indexed into the horizontal domain, then into the vertical domain, then into the polarization domain, and then into the group domain. The indexing order of the horizontal domain, vertical domain, polarization domain, and group domain may be other orders. The ports may be numbered from 0 to 127 or from 1 to 128.

[0418] <<Variation 2B>> An association between factors A and C and an association between factors B and C may be defined / configured. The association between factors A, B, and C may be established without using the association between factors A and B in embodiment A1. The final result may not be that the first CSI-RS resource is mapped to port indexes 0 to 31. This may lead to other associations between factors A and B.

[0419] <<Variation 2C>> Associations between factors A, B and C may be defined / established.

[0420] <Variation 3 of Embodiment C> Embodiment C may be applied to extensions based on Type 1 / Type 2 / Extended Type 2 / Additional Extended Type 2 using new (N1, N2). In extensions based on Rel. 15 Type 1 multi-panel CSI, the mapping / association to be defined / configured may be based on at least one of the following options: ◆ Option 1: An association between factors A and B and an association between factors A and C are defined / configured. For example, each CSI-RS resource may correspond to one panel or multiple panels. Consecutive ports may be indexed for each panel. ◆ Option 2: An association between factors A and B and an association between factors A and C are defined / configured. ◆ Option 3: An association between factors A and C and an association between factors B and C are defined / configured. ◆ Option 4: An association between factors A, B, and C is defined / configured. A table for the association between factors A, B, and C may be defined, and a new association indicator may be defined to indicate / set the association between factors A, B, and C. For example, association indicator=1 may be associated with four antenna groups #1 to #4 of (16,1) antennas. Each group may be associated with a CSI-RS resource. Antenna group #1 may be associated with port indexes 0 to 31, antenna group #2 may be associated with port indexes 32 to 63, antenna group #3 may be associated with port indexes 64 to 95, and antenna group #4 may be associated with port indexes 96 to 127.

[0421] Figure 35 shows an example of a 32-port association candidate for a multi-panel. In this example, the multi-panel g1 ,N g2 ) are two panels based on the number of CSI-RS antenna ports of 64, new (N1, N2), existing (N1, N2), and new (N g1 ,N g2) and . Only a subset of the associations in this example may be supported or configurable.

[0422] New (N1,N2) = (8,4), Existing (N1,N2) = (8,2), New (N g1 ,N g2 In the case where (8,2) = (1,2), as in this example, two CSI-RS may be associated with two (8,2) antennas respectively arranged in the vertical domain.

[0423] New (N1,N2) = (8,4), Existing (N1,N2) = (4,4), New (N g1 ,N g2 In the case where (r, r) = (2, 1), as in this example, two CSI-RS may be associated with two (4, 4) antennas respectively arranged in the horizontal domain.

[0424] As in the example of Figure 36, two CSI-RS resources may be TDM'd, with the first CSI-RS using ports 0 to 31 and the second CSI-RS using ports 32 to 63.

[0425] ((Embodiment D)) <Study D> SD beam selection and i 1,1 , i 1,2 (Additionally, for some ranks, 1,3 ) new (N1, N2) are defined for the number of expansion ports greater than 32. The number of expansion ports may be, for example, 48 / 64 / 72 / 96 / 128.

[0426] In embodiment B, for larger N1O1 and N2O2, i for each rank 1,1 , i 1,2 The feedback range and feedback bits of i need to be extended. For example, 1,1 = 0, 1, ..., N1O1-1 or 0, 1, ..., N1O1 / 2-1, and i 1,2 = 0, 1, ..., N2O2-1 or 0, 1, ..., N2O2 / 2-1.

[0427] For example, in embodiment B, for 128 ports, new (N1, N2) = (16, 4), existing (N1, N2) = (8, 2), new (N g1 ,N g2 In the case where (O1, O2) = (2, 2), if (O1, O2) = (4, 4) is assumed, as in the example of Figure 37, the UE selects an SD beam from N1O1 × N2O2 = (16 × 4) × (4 × 4) = 64 × 16 SD beams based on the new (N1, N2), and the selected SD beam is (i 1,1 ,i 1,2 ) = (12,1).

[0428] However, other methods of reporting the selected SD beam are possible, considering setting a new (N1, N2) for the expansion port number based on the existing (N1, N2) for the existing port number.

[0429] <Embodiment D1> In an SD beam report for a specific new (N1, N2) setting, i for each rank 1,1 , i 1,2 The feedback range and feedback bits of are set to indicate the SD beam within multiple ports from the associated existing port CSI-RS resource and are based on the associated existing (N1, N2) value. To indicate the CSI-RS resource (port group) selected for that SD beam, 1,4 Additional feedback content may be introduced.

[0430] In this disclosure, i 1,4 may be represented by other indices, such as i x , i x,y , i x,y,z , or any other of the above. x, y, and z may be any integers.

[0431] At least one of the following options may be defined: ◆ Option 1: i 1,4 is an index. Its bit size is ceil(log2(N g1 N g2 )) is also possible. ◆ Option 2: i 1,4is a function of two indices (i 1,4,1 , i 1,4,2 ) and their bit sizes are ceil(log2(N g1 )) and ceil(log2(N g2 )) may be. If N g1 = 1 or N g2 If = 1, the corresponding feedback i 1,4,1 or i 1,4,2 The bit may be missing.

[0432] In the example of FIG. 38, for 128 ports, new (N1, N2) = (16, 4), existing (N1, N2) = (8, 2), new (N g1 ,N g2 In the case where (O1,O2) = (2,2), it is assumed that (O1,O2) = (4,4). In this example, (i 1,1 , i 1,2 ) = (12,1) indicates an SD beam selected from N1N2O1O2 SD beams (N1O1 × N2O2 = 32 × 8 SD beams) based on the existing (N1, N2) (for a certain layer). 1,4,1 ,i 1,4,2 ) = (0,0) is N g1 ×N g2 = 2 × 2 CSI-RS resources. One CSI-RS resource corresponds to N1N2O1O2 SD beams based on the existing (N1, N2) resources. The association between the CSI-RS resources, CSI-RS port indexes, and the antenna positions of the new (N1, N2) resources may be based on embodiment C. In this example, four CSI-RS resources correspond to four N1N2O1O2 antenna groups based on the existing (N1, N2) resources, respectively. In this example, the UE selects an SD beam for the third CSI-RS resource.

[0433] (The SD beam for the first layer is the i 1,1 , i 1,2 , i 1,4 When displayed by i 1,3For the SD beams selected for different layers (determined via 1,1 +k1 or i 1,2 +k2 or i 1,1 + O1 or i 1,2 + For additional SD beams (for one or more other layers) determined from O2, i 1,1 ,i 1,2 is recognized as at least one of several options:

[0434] ◆ Option A: i from N1N2O1O2 SD beams based on new (N1, N2) 1,1 , i 1,2 In the example of Figure 39, for 128 ports, new (N1, N2) = (16, 4), existing (N1, N2) = (8, 2), new (N g1 ,N g2 In the case where (O1, O2) = (2, 2), it is assumed that (O1, O2) = (4, 4). In this example, the SD beams of the first layer are based on embodiment B and represent SD beams from N1N2O1O2 SD beams based on the new (N1, N2) (i 1,1 ,i 1,2 In this example, the SD beams of the other layers are represented by (i) = (12, 1). 1,1 ,i 1,2 + 2O2) = (12,1 + 8). In this example, the SD beam (i 1,1 ,i 1,2 ) to the SD beams of other layers. The offset from (N1, N2) to the SD beams of other layers may be represented by (0, 2O2) = (0, 8) in the N1N2O1O2 SD beams (N1O1 × N2O2 two-dimensional SD beams) based on the new (N1, N2).

[0435] ◆ Option B: i from N1N2O1O2 SD beams based on existing (N1, N2) 1,1 , i 1,2 The additional SD beams to be determined are i 1,4,1 , i 1,4,2Multiple SD beams for all layers may be selected from one and the same CSI-RS resource (N1N2O1O2 SD beams based on existing (N1,N2)). In the example of Figure 40, for 128 ports, new (N1,N2) = (16,4), existing (N1,N2) = (8,2), new (N g1 ,N g2 In the case where (O1,O2) = (2,2), it is assumed that (O1,O2) = (4,4). The association between the CSI-RS resources and the group of N1N2O1O2 antennas based on the existing (N1,N2) may be based on embodiment C. In this example, four CSI-RS resources correspond to four groups of N1N2O1O2 antennas based on the existing (N1,N2) respectively. In this example, the UE selects an SD beam for the third CSI-RS resource. The selected CSI-RS resource or the selected group of N1N2O1O2 antennas based on the existing (N1,N2) is (i 1,4,1 ,i 1,4,2 In this example, the SD beam of the first layer indicates an SD beam from a group of N1N2O1O2 SD beams based on the existing (N1, N2) that corresponds to the third CSI-RS resource (i 1,1 ,i 1,2 In this example, the SD beams of the other layers are SD beams from the N1N2O1O2 SD beams based on the existing (N1, N2) in the same third CSI-RS resource (i 1,1 ,i 1,2 + 2O2) = (12,1). In this example, the SD beam (i 1,1 ,i 1,2 ) to the SD beams of other layers is indicated by (0, 202) in (N101 × N202 two-dimensional SD beams). In this example, the position (i 1,1 ,i 1,2 + 2O2) = (i 1,1mod N1O1, (i 1,2 + 2O2) mod N2O2) = (12 mod 64, 1 + 8 mod 8) = (12, 1).

[0436] ◆ Option C: i from N1N2O1O2 SD beams based on new (N1, N2) 1,1 , i 1,2 The additional SD beams to be determined are i 1,4,1 , i 1,4,2 The calculation of option C may be based on at least one of several options Cx below.

[0437] - Option C1: The calculation is based on the location of multiple gNB antennas of new (N1, N2). In this option, the end result is the same as option A. - In the example of Figure 41, for 128 ports, new (N1, N2) = (16, 4), existing (N1, N2) = (8, 2), new (N g1 ,N g2 In the case where (O1,O2) = (2,2), it is assumed that (O1,O2) = (4,4). The association between the CSI-RS resources and the group of N1N2O1O2 antennas based on the existing (N1,N2) may be based on embodiment C. In this example, four CSI-RS resources correspond to four groups of N1N2O1O2 antennas based on the existing (N1,N2) respectively. The CSI-RS resources selected for the first layer may be different from the CSI-RS resources selected for the other layers. In this example, the UE selects an SD beam in the third CSI-RS resource for the first layer. The selected CSI-RS resource or the selected group of N1N2O1O2 antennas based on the existing (N1,N2) is (i 1,4,1 ,i 1,4,2 In this example, the SD beam of the first layer indicates the SD beam (i) from a group of N1N2O1O2 SD beams based on the existing (N1,N2) that corresponds to the third CSI-RS resource. 1,1 ,i 1,2In this example, the SD beams of the other layers are SD beams (i 1,1 ,i 1,2 + 2O2) = (12,1 + 8). In this example, the SD beam (i 1,1 ,i 1,2 ) to the SD beams of other layers is indicated by (0,2O2) = (0,8) in N1N2O1O2 SD beams (N1O1 × N2O2 two-dimensional SD beams) based on the new (N1,N2).

[0438] -◆ Option C2: The calculation is based on the order of CSI-RS resources. -◆ In the example of Figure 42, for 128 ports, New (N1,N2) = (16,4), Existing (N1,N2) = (8,2), New (N g1 ,N g2 In the case where (O1,O2) = (2,2), it is assumed that (O1,O2) = (4,4). The association between the CSI-RS resources and the group of N1N2O1O2 antennas based on the existing (N1,N2) may be based on embodiment C. In this example, four CSI-RS resources correspond to four groups of N1N2O1O2 antennas based on the existing (N1,N2) respectively. The CSI-RS resources selected for the first layer may be different from the CSI-RS resources selected for the other layers. In this example, the UE selects an SD beam in the third CSI-RS resource for the first layer. The selected CSI-RS resource or the selected group of N1N2O1O2 antennas based on the existing (N1,N2) is (i 1,4,1 ,i 1,4,2 In this example, the SD beam of the first layer indicates the SD beam (i) from a group of N1N2O1O2 SD beams based on the existing (N1,N2) that corresponds to the third CSI-RS resource. 1,1 ,i 1,2In this example, the SD beams of the other layers are SD beams (i 1,1 ,i 1,2 + 2O2) = (12,1). In this example, the SD beam (i 1,1 ,i 1,2 ) to the SD beams of other layers is shown by (0, 202) in the N1N20102 SD beams (N1O1 × N202 two-dimensional SD beams) based on the existing (N1, N2). In this example, the position (i 1,1 ,i 1,2 +2O2) is the (i 1,1 mod N1O1, (i 1,2 + 2O2) mod N2O2) = (12 mod 64, 1 + 8 mod 8) = (12, 1).

[0439] - Option C3: The calculation is based on the indexing order of the ports of the expansion port number. In this option, the final result may be determined by the association of the ports of the expansion port number in embodiment C with the base station antenna positions.

[0440] <Supplement to embodiment D> The SD beam reporting method extended by embodiment D may be applied to extensions based on (Rel. 15) Type 1 single-panel CSI and extensions based on (Rel. 15) Type 1 multi-panel CSI.

[0441] Various SD beam reporting methods (e.g., SD beam reporting methods including at least one of embodiment B and embodiment D) may be configurable by the NW depending on UE capabilities.

[0442] Various SD beam reporting methods (e.g., SD beam reporting methods including at least one of embodiment B and embodiment D) may be applied to different cases. For example, the SD beam reporting method of embodiment B may be applied to an extension based on (Rel. 15) Type 1 single-panel CSI, and the SD beam reporting method of embodiment D may be applied to an extension based on (Rel. 15) Type 1 multi-panel CSI. 1,4 may indicate the selected panel.

[0443] ((Embodiment E)) <Consideration E1> i 1,1 , i 1,2 (Additionally, for some ranks, 1,3 Regarding the selection and reporting of an SD beam for a certain rank according to (1), embodiment D describes a method that follows the association of CSI-RS resources, port indexes, and gNB antennas in embodiment C. Embodiment D can be applied to a Type 1 single-panel codebook and a Type 1 multi-panel codebook (based on Rel. 15) when the number of SD beams L=1.

[0444] Embodiment E considers a new method of SD beam reporting when L = 2, 4, or 6 SD beams are configured in the (Rel. 15) Type 2 codebook, (Rel. 16) Extended Type 2 codebook, (Rel. 16) Extended Type 2 PS codebook, and (Rel. 17) Additional Extended Type 2 PS codebook.

[0445] L SD beams are 1,1 , i 1,2 For 128 ports, New(N1,N2) = (16,4), Existing(N1,N2) = (8,2), New(N g1 ,N g2 In the case where (O1, O2) = (2, 2), if (O1, O2) = (4, 4) and L = 4 are assumed, as in the example of FIG. 1,1 = [q1 q2], q1∈{0,1,...,O1-1}, q2∈{0,1,...,O2-1} may display / report / select beam groups. 1,2An existing (N1,N2) in ∈{0,1,...,C(N1N2,L)-1} may be extended to a new (N1,N2). 1,2 may display / report / select L=4 SD beams from the beam group.

[0446] In this disclosure, i 1,4 , i 1,5 may be represented by other indices, such as i x , i x,y , i x,y,z , or any other of the above. x, y, and z may be any integers.

[0447] Embodiment E may be applied to cases where the total number of ports used for multiple existing port CSI-RS resources exceeds 32 (number of extended ports), or may be applied to cases where the total number of ports used for multiple existing port CSI-RS resources is 32 or less (number of existing ports).

[0448] <Embodiment E1> A constraint may be defined or set in the specification that when reporting L SD beams for a certain new (N1, N2) value, all L beams are selected from the same existing port CSI-RS resource or the same port group based on the existing (N1, N2) value and the existing port CSI-RS resource associated with the new (N1, N2) value.

[0449] i 1,2 The feedback range and feedback bits of may be based on the associated existing (N1, N2) values. 1,2 ∈{0, 1,..., C(existing N1N2,L)−1}.

[0450] i 1,1 The feedback format of i may remain unchanged from Rel. 15 / 16 Type 2CB. 1,1 The size (number of bits) of may be related to (O1, O2) for a larger number of ports.

[0451] i 1,1may be [q1 q2], which indicates one beam group from O1O2 beam groups. One beam group may have N1N2 existing SD beams. 1,2 may be an index indicating L beams from one beam group (existing N1N2 SD beams).

[0452] Additional feedback content i indicating / reporting / selecting one selected (associated) CSI-RS resource (or one selected port group) for L SD beams 1,4 may be introduced. Its content may be based on at least one of the following options: ◆ Option 1: i 1,4 has one index, whose size is ceil(log2(N g1 N g2 )) is also possible. ◆ Option 2: i 1,4 is two indexes (i 1,4,1 ,i 1,4,2 ), whose sizes are ceil(log2(N g1 )) and ceil(log2(N g2 )) may also be used. g1 = 1 or N g2 If = 1, the corresponding feedback i 1,4,1 or i 1,4,2 The bit may be missing.

[0453] For 128 ports, new (N1,N2) = (16,4), existing (N1,N2) = (8,2), new (N g1 ,N g2 In the case of (O1, O2) = (2, 2), in the example of FIG. 44, when (O1, O2) = (4, 4), L = 4, option 2 is assumed, (i 1,4,1 ,i 1,4,2 ) is based on the association of embodiment C, and N g1 ×N g2 = 2 × 2 CSI-RS resources #1 to #4, or one selected existing N1N2O1O2 = 8 × 2 × 4 × 2 antennas. 1,2denotes the L=4 SD beams based on the selected CSI-RS resources or the selected N1N2O1O2 existing antennas. In other words, the L=4 SD beams are restricted to the selected CSI-RS resources or the selected N1N2O1O2 existing antennas.

[0454] According to embodiment E1, multiple SD beams based on the number of extended ports can be appropriately reported while reducing reporting overhead.

[0455] <Embodiment E2> In reporting L SD beams for a certain new (N1, N2) value, each SD beam may be indicated / reported / selected by a combination of several of the following indexes: ◆i 1,4 The index may indicate the CSI-RS resource or port group to which the SD beam belongs. The size is ceil(log2(N g1 N g2 )) may also be used. 1,2 ∈{0, 1,..., existing N1N2-1}. Its index is i 1,4 It may indicate one SD beam from the existing N1N2 SD beams associated with the CSI-RS resource or port group indicated by

[0456] i 1,4 and i 1,2 L sets of i 1,1 may be used to represent the L SD beams, with

[0457] i 1,1 The feedback format of i may remain unchanged from Rel. 15 / 16 Type 2CB. 1,1 The size (number of bits) of may be related to (O1, O2) for a larger number of ports.

[0458] i 1,1 may be [q1 q2], which indicates one beam group from O1O2 beam groups. One beam group may have N1N2 existing SD beams. 1,2may be an index indicating one SD beam from one beam group.

[0459] For 128 ports, new (N1,N2) = (16,4), existing (N1,N2) = (8,2), new (N g1 ,N g2 In the case of (O1, O2) = (2, 2), when (O1, O2) = (4, 4) and L = 4 are assumed, in the example of FIG. 1,1 indicates a beam group containing new N1N2 = 16 × 4 SD beams. 1,4 and i 1,2 Each of the L=4 sets represents one SD beam. 1,4 is N g1 ×N g2 = 2 × 2 CSI-RS resources selected from CSI-RS resources #1 to #4, and i 1,2 is i 1,1 and the beam group selected by i 1,4 and the SD beam selected from the existing N1N2 = 8 × 2 SD beams based on.

[0460] According to embodiment E2, multiple SD beams based on the number of extended ports can be appropriately reported without limiting CSI-RS resources.

[0461] <Embodiment E3> A constraint may be defined or configured in the specification that L SD beams reported for a new (N1, N2) value are selected from M existing port CSI-RS resources or M port groups based on the existing (N1, N2) values ​​and existing port CSI-RS resources associated with the new (N1, N2) value. For example, M∈{1, 2, ..., N g1 N g2} may also be used.

[0462] Additional feedback content i indicating / reporting / selecting one selected (associated) CSI-RS resource (or one selected port group) for L SD beams 1,4may be introduced. Its content may be based on at least one of the following options: ◆ Option 1: i 1,4 has M indexes. Each index may indicate one selected CSI-RS resource or one port group. The size of each index is ceil(log2(N g1 N g2 )) is also possible. ◆ Option 2: i 1,4 has one field to indicate the combination of M selected CSI-RS resources or M port groups. The size of the field is ceil(log2(C(N g1 N g2 ,M))) is also acceptable. ◆Option 3: i 1,4 is N g1 N g2 A bitmap with N bits. g1 N g2 The CSI-RS resource or port group may correspond to one of the CSI-RS resource or port groups, and may indicate whether the corresponding CSI-RS resource or port group is selected.

[0463] i 1,2 The feedback range and feedback bits may be based on at least one of several options:

[0464] ◆ Option A: The feedback range and feedback bits are based on M × existing N1N2 antennas. 1,4 The existing N1N2 antennas in the M antenna groups represented by i 1,2 The CSI-RS may be indexed according to at least one of a CSI-RS resource index, a port index, and a horizontal / vertical / polarization index for reporting. 1,2 ∈{0, 1,..., C(M × existing N1N2,L)-1}.

[0465] ◆ Option B: Similar to embodiment E2, each SD beam may be represented / reported / selected by a combination of several of the following indices: - ◆ i 1,5 The index may indicate the CSI-RS resource or port group to which the SD beam belongs. The size may be ceil(log2(M)). 1,2 ∈{0, 1,..., existing N1N2-1}. Its index is i 1,5 may represent one SD beam from the existing N1N2 SD beams associated with the CSI-RS resource or port group represented by i. 1,4 and one value of i 1,1 With one value of and, i 1,5 and i 1,2 may be reported.

[0466] i 1,1 The feedback format of i may remain unchanged from Rel. 15 / 16 Type 2CB. 1,1 The size (number of bits) of may be related to (O1, O2) for a larger number of ports.

[0467] i 1,1 may be [q1 q2], which indicates one beam group from O1O2 beam groups. One beam group may have N1N2 existing beams. 1,2 may be an index indicating L beams from M beam groups (M × existing N1N2 beams).

[0468] For 128 ports, new (N1,N2) = (16,4), existing (N1,N2) = (8,2), new (N g1 ,N g2 In the case of (O1, O2) = (2, 2), when (O1, O2) = (4, 4), L = 4, M = 2, Option 3, Option A are assumed, in the example of FIG. 46, i 1,1 indicates a beam group containing new N1N2 = 16 × 4 beams. 1,4 is N g1 ×N g2= 2 × 2 CSI-RS resources #1 to #4. In Option 3, i 1,4 is a bitmap "1010" indicating CSI-RS resources #1 and #3. In Option A, i 1,2 indicates L = 4 SD beams from M × existing N1N2 = 2 × 8 × 2 SD beams within CSI-RS resources #1 and #3.

[0469] The extended SD beam reporting method in embodiment E may be applied to at least one of the (Rel. 15) Type 2 codebook, the (Rel. 16) extended Type 2 codebook, the (Rel. 16) extended Type 2 PS codebook, and the (Rel. 17) additional extended Type 2 PS codebook.

[0470] According to embodiment E3, multiple SD beams based on the number of extended ports can be appropriately reported while reducing reporting overhead.

[0471] <Variations of Embodiments E1 to E3> A plurality of SD beam reporting methods may be applied to a plurality of cases, such as a plurality of codebook types, a plurality of numbers of extension ports (e.g., 48 / 64 / 72 / 96 / 128), a plurality of antenna configurations, existing (N1, N2) or new (N g1 ,N g2 ), multiple L values, multiple parameter combinations (paramCombinations), and multiple ranks. Multiple SD beam reporting methods may be configurable by the NW depending on UE capabilities.

[0472] <Study E2> Embodiment E studies a new method of port reporting for (Rel. 17) Type 2 PS CB.

[0473] The precoding matrix indicated by the PMI is determined from L+M vectors, where L=K1 / 2 and K1=αP CSI-RS is.

[0474] 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}.

[0475] The L ports selected for each polarization are i 1,2 Reported by Existing P CSI-RS / 2 means the number of ports for one polarization.

[0476] <Embodiment E0> (Rel. 15 / 16 / 17) In Type 2 PS CB, existing P CSI-RS (Number of existing ports) ∈ {4, 8, 12, 16, 24, 32} is supported. New P for extension based on Type 2 PS CB CSI-RS For (number of new ports) ∈ {48, 64, 72, 96, 128}, similar to embodiment C, CSI-RS The association between the port index and the existing port CSI-RS resource within this port may be defined in the specification or may be configured.

[0477] The difference of Type 2CB from Type 2CB or Extended Type 2CB is that ports or CSI-RS resources do not need to be associated with gNB antenna locations. CSI reporting may be for selected ports. The gNB antenna structure may be transparent to the UE.

[0478] As an example of FIG. 47, for Type 2 PS CB, CSI-RS And existing P CSI-RS And new N g An association between and may be supported / defined / established. In this example, one association is N g The first existing port CSI-RS resource corresponds to the first existing port CSI-RS resource.CSI-RS Ports are new P CSI-RS Port index for ports from 0 to existing ports CSI-RS -1. The second existing P CSI-RS Ports are new P CSI-RS Port index for the existing port CSI-RS From 2 x existing P CSI-RS Supports up to -1.

[0479] According to embodiment E0, in the extension of the Type 2 PS CB, a port selected from the number of ports in the extension port number can be appropriately reported.

[0480] <Embodiment E4> (Rel. 17) A new P in an extension based on Type 2 PS CB CSI-RS The L ports selected for the new P CSI-RS The existing P associated with CSI-RS Based on this, a constraint may be defined or set in the specification that all of the L ports are selected from the same existing port CSI-RS resource or the same port group.

[0481] i 1,2 The feedback range and feedback bits of CSI-RS It may be based on the value of i 1,2 ∈{0,1,...,C (existing P CSI-RS , L)−1}.

[0482] Additional feedback content i indicating / reporting / selecting one selected (associated) CSI-RS resource (or one selected port group) for L ports. 1,4 may be introduced.

[0483] According to embodiment E4, in the extension of the Type 2 PS CB, L ports selected from the number of ports in the extension port number can be appropriately reported.

[0484] <Embodiment E5> (Rel. 17) In an extension based on Type 2 PS CB, a new P CSI-RSEach port in the L ports selected for may be represented / reported / selected by a combination of some of the following indices: 1,4 The index may indicate the CSI-RS resource or port group to which the port belongs. The size is ceil(log2(N g )) may also be used. 1,2 ∈{0,1,..., existing P CSI-RS / 2-1}. The index is i 1,4 The existing P associated with the CSI-RS resource or port group indicated by CSI-RS / It may indicate one port out of two ports.

[0485] i 1,4 and i 1,2 may be used to represent the L ports.

[0486] According to embodiment E5, in the extension of the Type 2 PS CB, L ports selected from the number of ports in the extension port number can be appropriately reported.

[0487] <Embodiment E6> (Rel. 17) In an extension based on Type 2 PS CB, a new P CSI-RS The L ports selected for the new P CSI-RS The existing P associated with CSI-RS A constraint may be defined or set in the specification that all L ports are selected from M existing port CSI-RS resources or M port groups based on M∈{1, 2, ..., N g} may also be used.

[0488] Additional feedback content i indicating / reporting / selecting one selected (associated) CSI-RS resource (or one selected port group) for L ports. 1,4 may be introduced. Its content may be based on at least one of the following options: ◆ Option 1: i 1,4has M indexes. Each index may indicate one selected CSI-RS resource or one port group. The size of each index is ceil(log2(N g )) is also possible. ◆ Option 2: i 1,4 has one field to indicate the combination of M selected CSI-RS resources or M port groups. The size of the field is ceil(log2(C(N g ,M))) is also acceptable. ◆Option 3: i 1,4 is N g A bitmap with N bits. g The CSI-RS resource or port group may correspond to one of the CSI-RS resource or port groups, and may indicate whether the corresponding CSI-RS resource or port group is selected.

[0489] i 1,2 The feedback range and feedback bits may be based on at least one of several options:

[0490] ◆ Option A: The feedback range and feedback bit are M × existing P CSI-RS Based on antennas i 1,2 ∈{0,1,...,C(M×existing P CSI-RS / 2,L)-1}.

[0491] ◆ Option B: Similar to embodiment E5, each port may be represented / reported / selected by a combination of several of the following indices: - ◆ i 1,5 The index may indicate the CSI-RS resource or port group to which the port belongs. The size may be ceil(log2(M)). 1,2 ∈{0,1,..., existing P CSI-RS / 2-1}. The index is i 1,5 The existing P associated with the CSI-RS resource or port group indicated by CSI-RSOne port from the number of ports may be displayed. 1,5 and i 1,2 may be reported.

[0492] According to embodiment E6, in the extension of the Type 2 PS CB, L ports selected from the number of ports in the extension port number can be appropriately reported.

[0493] <Variations of Embodiments E4 to E6> In a Type 2 PS CB of Rel. 15 / 16, L ports are assigned for each polarization. 1,1 Selected by i 1,1 ∈{0,1,...,ceil(P CSI-RS / (2d))-1}.

[0494] Similar to embodiment E4 / Embodiment E5 / Embodiment E6, the selected / associated existing P CSI-RS By considering L ports per polarization, L ports may be displayed.

[0495] A plurality of port reporting methods may be applied to a plurality of cases, such as a plurality of codebook types, a plurality of extension port numbers (e.g., 48 / 64 / 72 / 96 / 128), a plurality of antenna configurations, a plurality of existing P CSI-RS The port reporting method may be defined by at least one of multiple associations with , multiple L values, multiple parameter combinations (paramCombinations), and multiple ranks. The multiple port reporting methods may be configurable by the NW depending on the UE capabilities.

[0496] <Study E3> (Rel. 16) The parameter combination (paramCombination) setting in the extended type 2 CB is defined as shown in Figure 48. (Rel. 16) The paramCombination setting in the extended type 2 PS CB is defined as shown in Figure 49. (Rel. 17) The paramCombination setting in the additional extended type 2 PS CB is defined as shown in Figure 50.

[0497] Parameter settings of ranks 5 to 8 for more than 32 ports are considered. Parameter settings may vary depending on at least one of the codebook type, the number of ports, ranks 1 to 8, antenna configuration (N1, N2), and number of subbands N3, R. Even if the supported ranks are not extended for more than 32 ports, new values ​​may be considered for parameter settings.

[0498] <Embodiment E7> In setting parameters / paramCombination for a codebook, specific values ​​of specific parameters may be supported / defined / set according to at least one of the following options: ◆ Option 1: Values ​​of L greater than the existing (extended type 2 CB / extended type 2 PS CB / additional extended type 2 PS CB) value (e.g., at least one of 8 and 10) are not supported. ◆ Option 2: p v ◆ Option 2: Values ​​other than the existing (Extended Type 2 CB / Extended Type 2 PS CB / Additional Extended Type 2 PS CB) values ​​of β (e.g., at least one of a value smaller than the existing value, a value larger than the existing value, 1 / 16, 3 / 4) are not supported. ◆ Option 3: Values ​​other than the existing (Extended Type 2 CB / Extended Type 2 PS CB / Additional Extended Type 2 PS CB) values ​​of β (e.g., at least one of a value smaller than the existing value, a value larger than the existing value, 1 / 8, 1 / 16, 7 / 8, 1) are not supported. ◆ Option 4: Values ​​other than the existing (Extended Type 2 CB / Extended Type 2 PS CB / Additional Extended Type 2 PS CB) values ​​of M (e.g., 3 / 4) are not supported. ◆ Option 4: Values ​​other than the existing (Extended Type 2 CB / Extended Type 2 PS CB / Additional Extended Type 2 PS CB) values ​​of α (e.g., at least one of 1 / 4, 1 / 8) are not supported.

[0499] A new paramCombination may be defined to take into account revisions to one or more of the aforementioned parameters. The new paramCombination may vary depending on at least one factor of the codebook type, the number of ports, the rank 1 to 8, the antenna configuration (N1, N2), the number of subbands N3, and R.

[0500] The value of the parameter / paramCombination may depend on the UE capabilities, which may be defined / reported per the value of its at least one factor.

[0501] According to embodiment E7, in the extension of Type 2 CB / Type 2 PS CB, appropriate parameters can be set.

[0502] Supplement to Embodiment E The UE can support a two-dimensional arrangement of multiple antennas for 32 or fewer ports (e.g., existing (N1, N2)), a two-dimensional arrangement of multiple antennas for more than 32 ports (e.g., new (N1, N2)), and multiple groups of multiple antennas for more than 32 ports (e.g., new (N g1 ,N g2 ) or new N g ), a plurality of CSI-RS resources, and a CSI codebook. Based on the configuration, the UE may associate each CSI-RS resource with 32 or fewer ports, associate a plurality of CSI-RS resources with more than 32 ports, and determine a plurality of beams and one or more CSI-RS resources corresponding to the plurality of beams among the plurality of CSI-RS resources for reporting.

[0503] ((Embodiment F)) <Analysis F1> In embodiment A, configuring multiple CSI-RS resources using the existing port number to support the extended port number is described. In embodiment A1-2, constraints on multiple CSI-RS resources for aggregation of CSI-RS resources to use the extended port number are described.

[0504] <Analysis F2> In embodiment C, the association setting between new (N1, N2), existing (N1, N2), and existing port CSI-RS resources is described.

[0505] <Analysis F2> In embodiment E, new P CSI-RS and existing P CSI-RS The association setting between is explained.

[0506] <Consideration F> The following considerations can be made. ◆Consideration F1: When configuring multiple CSI-RS resources using the existing number of ports to support the extended number of ports, the constraints and configuration details have not been sufficiently considered. ◆Consideration F2: When configuring CMR and IMR for CSI measurement / reporting, the configuration details have not been sufficiently considered.

[0507] Embodiment F may be applied to at least one of the above items a, b, and c.

[0508] Embodiment F may be applied to cases where the total number of ports used for multiple existing port CSI-RS resources exceeds 32 (number of extended ports), or may be applied to cases where the total number of ports used for multiple existing port CSI-RS resources is 32 or less (number of existing ports).

[0509] <Embodiment F1> The constraint imposed on the constraint in embodiment A for multiple CSI-RS resources (e.g., NZP CSI-RS resources) for using the extended port number may be based on at least one of several options below (the multiple CSI-RS resources may be configured with at least one constraint from several options below).

[0510] ◆ Option 1: All of the multiple CSI-RS resources have the same setting of powerControlOffset, which indicates the power offset of the PDSCH resource element (RE) relative to the NZP CSI-RS RE. The same ratio of PDSCH energy per resource element (EPRE) to NZP CSI-RS EPRE may be configured across all of the multiple CSI-RS resources.

[0511] ◆ Option 2: All of the multiple CSI-RS resources have the same setting of powerControlOffsetSS, which indicates the power offset of NZP CSI-RS REs relative to SSS REs. The same value of the ratio of NZP CSI-RS EPREs to SS / PBCH block EPREs may be configured across all of the multiple CSI-RS resources.

[0512] ◆ Option 3: All of the multiple CSI-RS resources have the same configuration of TCI state, or at least the same configuration for QCL type D.

[0513] ◆ Option 4: All of the multiple CSI-RS resources have the same number of ports. For this option, the multiple CSI-RS resources may be based on at least one of the following examples: - ◆ Example: To support 128 ports, four 32-port CSI-RS resources are configured with TDM. - ◆ Example: To support 96 ports, three 32-port CSI-RS resources are configured with TDM. - ◆ Example: To support 64 ports, two 32-port CSI-RS resources are configured with TDM. - ◆ Example: To support 96 ports, four 24-port CSI-RS resources are configured with TDM. - ◆ Example: To support 72 ports, three 24-port CSI-RS resources are configured with TDM. - ◆ Example: To support 48 ports, two 24-port CSI-RS resources are configured with TDM.

[0514] ◆ Option 5: All of the multiple CSI-RS resources have the same location in the frequency domain and the same RE mapping in the frequency domain.

[0515] ◆ Option 6: All of the multiple CSI-RS resources have the same RE density.

[0516] ◆ Option 7: All of the multiple CSI-RS resources are within M consecutive slots within the same discontinuous reception (DRX) active time. M may be according to the UE capabilities. For this option, the multiple CSI-RS resources may be based on at least one of the following examples: - ◆ Example: Two TDMed 32-port CSI-RS resources are within one slot within the same DRX active time. - ◆ Example: Three or four TDMed 32-port CSI-RS resources are within two slots within the same DRX active time. - ◆ Example: Two TDMed 32-port CSI-RS resources are within two slots within the same DRX active time. - ◆ Example: Four TDMed 32-port CSI-RS resources are within four slots within the same DRX active time.

[0517] According to embodiment F1, multiple CSI-RS resources for supporting an extended number of ports can be appropriately configured.

[0518] Embodiment F2 A method (signaling structure) for realizing one or more constraints in embodiment F1 may be based on at least one of the following options.

[0519] ◆ Option 1: Each existing port CSI-RS resource configuration has the same setting of one or more parameters. This option may be based on the following example: ◆ Example: An example of a configuration of a new group #N (new port CSI-RS resource #N) of CSI-RS resources for supporting 96 ports (Figure 51) includes a new group ID (new CSI-RS resource ID) = N and a list including CSI-RS resources #1 to #3. Each CSI-RS resource uses 32 ports. Each CSI-RS resource configuration includes a CSI-RS resource ID ∈ {1, 2, 3}, parameter A set to value X, parameter B set to value Y, and parameter C set to value Z.

[0520] ◆ Option 2: One or more corresponding parameters are configured for one existing port CSI-RS resource (specific CSI-RS resource). The specific CSI-RS resource may be, for example, the first CSI-RS resource or the reference CSI-RS resource. The other CSI-RS resources may follow one or more parameters for the specific CSI-RS resource. In this case, the one or more parameters for the other CSI-RS resources may be configured with the same values ​​as the one or more parameters for the specific CSI-RS resource, may be configured with values ​​different from those for the specific CSI-RS resource, or may not be configured at all. The UE may assume that one or more parameters for the other CSI-RS resources follow one or more parameters of the specific CSI-RS resource. This option may be based on the following example. -◆ Example: An example of a configuration of a new group #N (new port CSI-RS resource #N) of CSI-RS resources to support 96 ports (Figure 52) includes a new group ID (new CSI-RS resource ID) = N and a list including CSI-RS resources #1 to #3. Each CSI-RS resource uses 32 ports. The configuration of each CSI-RS resource includes a CSI-RS resource ID ∈ {1, 2, 3}. The configuration of CSI-RS resource #1 includes parameter A set to value X, parameter B set to value Y, and parameter C set to value Z. Within each configuration of CSI-RS resources #2 and #3, the settings / fields for parameters A, B, and C are not present.

[0521] ◆ Option 3: One set of one or more parameters is configured / applied for one group. The group includes multiple existing port CSI-RS resources. For example, a new group ID or new CSI-RS resource ID may be configured. The ID may correspond to multiple CSI-RS resources. One or more parameters may be configured for the new group ID or new CSI-RS resource ID. This option may be based on the following example. ◆ Example: An example of configuring a new group #N (new port CSI-RS resource #N) of CSI-RS resources to support 96 ports (Figure 53) includes a new group ID (new CSI-RS resource ID) = N, parameter A set to value X, parameter B set to value Y, parameter C set to value Z, and a list including CSI-RS resources #1 to #3. Each CSI-RS resource uses 32 ports. Each CSI-RS resource configuration includes a CSI-RS resource ID ∈ {1, 2, 3}. Within each CSI-RS resource configuration, the settings / fields for parameters A, B, and C are not present.

[0522] ◆ Option 4: To realize the expanded port number, one existing-port CSI-RS resource is configured with a repetition factor X∈{2,3,4}. For this new repetition configuration, a new parameter (e.g., largerPort-r18) may be introduced to distinguish it from the existing repetition configuration. This option may be based on at least one of the following examples: ◆ Example: To support 128-port CSI-RS, one 32-port CSI-RS resource is configured with a repetition factor X=4 and largerPort-r18=1 (enabled). ◆ Example: To support 48-port CSI-RS, one 24-port CSI-RS resource is configured with a repetition factor X=2 and largerPort-r18=1 (enabled). Example: An example of the configuration of a new group #N (new port CSI-RS resource #N) of CSI-RS resources for supporting 128 ports (Figure 54) includes a new group ID (new CSI-RS resource ID) = N, CSI-RS resource #1, a repetition factor set to 4, and largerPort-r18 set to 1 (enabled). CSI-RS resource #1 uses 32 ports. The configuration of CSI-RS resource #1 may include parameter A set to value X, parameter B set to value Y, and parameter C set to value Z. The repetition factor and largerPort-r18 may be included in the configuration of CSI-RS resource #1.

[0523] According to embodiment F2, multiple CSI-RS resources for supporting an extended number of ports can be appropriately configured.

[0524] <Embodiment F3> The CMR setting in the CSI-ReportConfig for CSI measurement / reporting may be based on at least one of the following options.

[0525] ◆ Option 1: For CSI extension based on Type 2 or Extended Type 2, only one new port CSI-RS resource having a new CSI-RS resource may be configured. Instead of the new port CSI-RS resource, a new group having a new group ID and including multiple existing port CSI-RS resources may be configured. The new port CSI-RS resource or the new group may be considered as one CMR.

[0526] ◆ Option 2: Configuration for CSI extension based on Type 1 or multi-CRI reporting may be based on at least one of the following several options 2x.

[0527] - Option 2a: Only one new port CSI-RS resource may be configured. Instead of the new port CSI-RS resource, a new group including multiple existing port CSI-RS resources may be configured. The new port CSI-RS resource or the new group may be considered as one CMR. This option may be based on the following example.

[0528] ◆ Option 2b: Multiple new port CSI-RS resources may be configured. The new port CSI-RS resources may be considered as CMRs. Multiple new groups may be configured instead of new port CSI-RS resources. Each new group may include multiple existing port CSI-RS resources. The maximum number of configurable new port CSI-RS resources (or new groups) may depend on the UE capability. The UE capability may be defined / reported for each value of at least one of the parameters of the number of ports and the rank. Multiple new port CSI-RS resources or multiple new groups may be considered as multiple CMRs. This option may be based on at least one of the following features: ◆ In this case, for multiple existing port CSI-RS resources in different multiple new groups, the constraints of embodiment A and embodiment F1 may be applied across the multiple new groups. For example, at least one of the number of ports and RE density is set to the same value across the multiple new groups. The QCL / TCI state settings may be different between multiple groups. In this case, information such as a CRI indicating one or more selected new port CSI-RS resources or one or more selected new groups may be reported. In an extension based on multi-CRI reporting, multiple CRIs indicating multiple selected new port CSI-RS resources or multiple selected new groups may be reported (using a method similar to embodiment D). In an extension based on multi-CRI reporting, the total number of ports for multiple legacy port CSI-RS resources may be 32 or less. For example, a UE may be configured with two 12-port CSI-RS resources and configured to report two CRIs using two CSIs, respectively. The restrictions on multiple legacy port CSI-RS resources in embodiments A and F1 may also be applied to cases where the total number of ports used for multiple legacy port CSI-RS resources is 32 or less. The configuration method in embodiment F2 may also be applied to cases where the total number of ports used for multiple legacy port CSI-RS resources is 32 or less.--◆In an extension based on multi-CRI reporting, in the case where the total number of ports used for multiple existing port CSI-RS resources is 32 or less, the new port CSI-RS resources may include two 4-port CSI-RS resources, may include three 4-port CSI-RS resources, may include four 4-port CSI-RS resources, may include five 4-port CSI-RS resources, may include six 4-port CSI-RS resources, or may include three 8-port CSI-RS resources. --◆In extensions based on multi-CRI reporting, in cases where the total number of ports used for multiple existing port CSI-RS resources exceeds 32, the new port CSI-RS resources may include five 8-port CSI-RS resources, may include three 12-port CSI-RS resources, may include four 12-port CSI-RS resources, may include five 12-port CSI-RS resources, or may include five 16-port CSI-RS resources.

[0529] Option 1 / 2a may be based on Example 1 / 2 below.

[0530] Example 1: One CMR #1 is configured for 128 ports. CMR #1 has a new CSI-RS resource ID #A or a new group ID #A. The new port CSI-RS resource or the new group may be configured based on embodiment F2.

[0531] Example 2: One CMR #1 is configured. CMR #1 directly configures multiple legacy port CSI-RS resources #1 to #4. Each legacy port CSI-RS resource uses 32 ports.

[0532] Option 2b may be based on example 3 / 4 below.

[0533] Example 3: Two CMRs, CMR #1 and #2, are configured. CMR #1 includes multiple legacy port CSI-RS resources #1 to #4. CMR #2 includes multiple legacy port CSI-RS resources #5 to #8. Each legacy port CSI-RS resource uses 32 ports.

[0534] ◆ Example 4: Three CMRs #1 to #3 are configured. CMR #1 is a new port CSI-RS resource (new CSI-RS resource ID #A) or a new group (new group ID #A) using 128 ports. CMR #2 is a new port CSI-RS resource (new CSI-RS resource ID #B) or a new group (new group ID #B) using 128 ports. CMR #3 is a new port CSI-RS resource (new CSI-RS resource ID #C) or a new group (new group ID #C) using 128 ports. Each new port CSI-RS resource or each new group may be configured based on embodiment F2.

[0535] In the CSI-ReportConfig for CSI measurement / reporting, the ZP-IMR (CSI-IM resource) configuration may be configured.

[0536] In the case of the CMR configuration of Option 1 or Option 2a of embodiment F3 (one new port CSI-RS resource or one new group of multiple existing port CSI-RS resources is configured as one CMR), there may be only one ZP-IMR configured for one CMR. When measuring the ZP-IMR, the UE may assume the same QCL type D as that CMR.

[0537] For example, CMR#1 and ZP-IMR#1 may be configured. CMR#1 may include CSI-RS resources#1 to #4. Each of CSI-RS resources#1 to #4 may use 32 ports. ZP-IMR#1 may be CSI-IM resource#1.

[0538] The case of CMR configuration in option 2b of embodiment F3 (multiple new port CSI-RS resources or multiple new groups are configured as multiple CMRs) may be based on at least one of the following options: ◆ Option 1: There may be only one ZP-IMR configured for multiple CMRs. When measuring the ZP-IMR, the UE may assume the same QCL type D as the CMR mapped to each CSI. ◆ Option 2: There may be multiple ZP-IMRs configured for multiple CMRs. Multiple ZP-IMRs may be mapped one-to-one to multiple CMRs. When measuring each ZP-IMR, the UE may assume the same QCL type D as the mapped (corresponding) CMR.

[0539] For example, CMRs #1 and #2 and ZP-IMRs #1 and #2 may be configured. CMR #1 may include CSI-RS resources #1 to #4. CMR #2 may include CSI-RS resources #5 to #8. Each of CSI-RS resources #1 to #8 may use 32 ports. ZP-IMR #1 is CSI-IM resource #1 and may be mapped to CMR #1. ZP-IMR #2 is CSI-IM resource #2 and may be mapped to CMR #2.

[0540] In the CSI-ReportConfig for CSI measurement / reporting, the NZP-IMR (NZP CSI-RS resource for interference measurement) configuration may be configured. The NZP-IMR configuration may be based on at least one of the following options: ◆ Option A: NZP-IMR configuration is not supported. Only ZP-IMR configuration may be supported. ◆ Option B: One NZP-IMR configuration is supported. ◆ Option C: One-to-one multiple NZP-IMR configurations for multiple CMRs are supported. Multiple NZP-IMRs may be mapped one-to-one to multiple CMRs.

[0541] For multiple cases of at least one of the codebook type, number of ports, rank, CMR setting method, and ZP-IMR setting method, multiple options from options A to C may be applied, respectively.

[0542] According to embodiment F3, the CMR / IMR for supporting the number of expansion ports can be appropriately set.

[0543] Supplement to Embodiment F The resource configuration for CSI may indicate one or more CMRs. A CMR may be a new port CSI-RS resource or a new group. A CMR may indicate N occasions. The N occasions may be time-division multiplexed. The N occasions may correspond to N existing port CSI-RS resources or N repetitions of one existing port CSI-RS resource.

[0544] The N legacy port CSI-RS resources may be associated with N occasions. The UE may associate the legacy port CSI-RS resources with P ports, which may be 32 or less, and associate the N occasions with N×P ports, where P is the number of legacy ports (legacy P CSI-RS The UE may determine CSI based on measurements at the N occasions for the CMR and report the CSI for the CMR.

[0545] The resource configuration for the CSI may further indicate one or more IMRs. Each CMR may be associated with one or more IMRs.

[0546] The UE may report one or more CRIs each indicating one or more selected existing port CSI-RS resources, and a CQI / PMI / RI calculated for each CRI.

[0547] (Embodiment G) Analysis G Embodiment A describes configuring multiple CSI-RS resources using the existing number of ports to support more than 32 ports.

[0548] Embodiment F1 describes constraints on multiple CSI-RSr sources to support more than 32 ports.

[0549] The configuration constraints applied may be different between multiple CSI-RS resources transmitted in a TDM manner, multiple CSI-RS resources transmitted in an FDM manner, and multiple CSI-RS resources transmitted in a TDM and FDM manner.

[0550] The following several issues may be considered: ◆ Issue 1: Differences regarding configuration constraints for various cases may be considered ◆ Issue 2: The interpretation regarding the power offset between CSI-RS and PDSCH may be different for the types of TDM case, FDM case, and TDM and FDM case.

[0551] In the present disclosure, power offset, power control offset, powerControlOffset, and powerControlOffsetSS may be read as interchangeable. In the present disclosure, EPRE and power may be read as interchangeable.

[0552] <Embodiment G1> In transmitting CSI-RS resources of multiple existing ports to support more than 32 ports, supporting at least one multiplexing type (multiplexing method) of TDM transmission, FDM transmission, or TDM and FDM transmission may be defined in the specifications, may be configured by the NW via RRC, or may be in accordance with UE capabilities.

[0553] Which multiplex types are supported or configurable may depend on one or more of several optional factors:

[0554] ◆Option 1: Number of expansion ports. For example, 48 / 64 / 72 / 96 / 128.

[0555] ◆Option 2: Antenna settings for each port number (N1, N2).

[0556] ◆ Option 3: The number of legacy port CSI-RS resources required. For example, 2 / 3 / 4. For example, in the case of three legacy port CSI-RS resources, TDM and FDM transmission may not be supported. For example, in the case of three legacy port CSI-RS resources, TDM and FDM transmission may not be supported. For example, in the case of two legacy port CSI-RS resources, TDM transmission or FDM transmission may be supported or may be configurable. For example, in the case of four legacy port CSI-RS resources, TDM transmission, FDM transmission, or TDM and FDM transmission may be supported or may be configurable.

[0557] The following configuration constraints may be commonly applied to the three multiplexing types: ◆ Multiple legacy port CSI-RS resources have the same time-domain behavior (periodic (P), semi-persistent (SP), or aperiodic (AP)). Multiple legacy port CSI-RS resources may have the same periodicity in P / SP. ◆ Multiple legacy port CSI-RS resources have the same number of ports. ◆ Multiple legacy port CSI-RS resources have the same density (frequency-domain density). ◆ Multiple legacy port CSI-RS resources have the same TCI state setting. ◆ Multiple legacy port CSI-RS resources have the same powerControlOffsetSS. ◆ Multiple legacy port CSI-RS resources have the same powerControlOffset.

[0558] The UE / gNB may interpret the value of the power offset (powerControlOffsetSS / powerControlOffset) based on embodiment G4.

[0559] The configuration constraints for TDM transmission of multiple existing port CSI-RS resources may be based on embodiment F.

[0560] According to embodiment G1, the UE can be configured with an appropriate multiplexing type of multiple existing port CSI-RS resources to support more than 32 ports.

[0561] <Embodiment G2> For FDM transmission of multiple existing port CSI-RS resources, one or more of the following optional configuration constraints may be supported.

[0562] ◆ Option 1: Multiple CSI-RS resources have the same scrambling ID. Multiple CSI-RS resources for more than 32 ports are considered as one CMR, and it is preferable to apply one scrambling ID to one CMR to simplify UE implementation. In this case, the UE only needs to process one scrambling ID on the same symbol.

[0563] ◆ Option 2: Multiple CSI-RS resources have the same periodicity and offset (same periodicityAndOffset). It can be guaranteed that multiple CSI-RS resources are transmitted in the same slot.

[0564] ◆ Option 3: Multiple CSI-RS resources have frequency resources. This option may be based on at least one of the following several options 3-x: - ◆ Option 3-1: Multiple CSI-RS resources are in the same bandwidth and band, but have different frequency resources (e.g., REs / RBs) within that band. Multiple CSI-RS can cover the same band (RB range). For example, multiple existing port CSI-RS resources have the same CSI frequency occupancy (CSI-FrequencyOccupation, starting RB, number of RBs (nrofRBs)), but have different RBs (comb arrangement) by setting dense=0.5 and selecting even RBs (evenRBs) or odd RBs (oddRBs). For example, multiple legacy port CSI-RS resources have the same bandwidth (number of RBs (nrofRBs)) but different RBs depending on whether density = 0.5 or starting RB (evenRB) is set. In the example of Figure 55A, two CSI-RS resources have the same bandwidth but different RB locations within the same band. In this example, the first CSI-RS resource has odd-numbered (1, 3, ...) RBs (even RB indexes 0, 2, ...), and the second CSI-RS resource has even-numbered (2, 4, ...) RBs (odd RB indexes 1, 3, ...). The two CSI-RS resources can be transmitted using frequency division multiplexing (FDM) within the same wideband. This option allows for only two CSI-RS resources at the same time, even when only density = 0.5 is supported as in the existing specifications. The channel characteristics measured for each resource may include wideband information. Option 3-2: Multiple CSI-RS resources have the same bandwidth but are in different bands. For example, this option can be realized by setting the same number of RBs but different starting RBs for multiple CSI-RS resources. This option allows for two, three, or four CSI-RS resources at the same time.The channel characteristics measured for each resource include narrowband information. In the example of Figure 55B, the three CSI-RS resources have the same bandwidth but different bands (starting RBs).

[0565] According to embodiment G2, the UE can be properly configured with multiple FDMed existing port CSI-RS resources to support more than 32 ports and can properly receive / measure.

[0566] <Embodiment G3> For TDM and FDM transmission of multiple legacy port CSI-RS resources, one or more of the following optional configuration constraints may be supported: TDM and FDM transmission may be applied to the case of four legacy port CSI-RS resources.

[0567] ◆ Option 1: Multiple CSI-RS resources have the same scrambling ID. Multiple CSI-RS resources for more than 32 ports are considered as one CMR, and it is preferable that one scrambling ID is applied to one CMR to make UE implementation easier.

[0568] ◆ Option 2: Some CSI-RS resources have the same time resource (e.g., the same slot / symbol). This option may be based on at least one of the following several options 2-x: - ◆ Option 2-1: Two CSI-RS resources out of four CSI-RS resources may be in the same slot. The four CSI-RS resources may be in two consecutive slots. For example, two sets of CSI-RS resources and the other two sets of CSI-RS resources may have different time offsets. - ◆ Option 2-2: All four CSI-RS resources may be in the same slot. All four CSI-RS resources may have the same periodicity and offset (same periodicityAndOffset).

[0569] ◆ Option 3: Some CSI-RS resources have the same frequency resource. This option may be based on at least one of the following several options 3-x: - ◆ Option 3-1: Of the four CSI-RS resources, each set of two CSI-RS resources on the same symbol has the same bandwidth and is in the same band, but has different frequency resources (e.g., RE / RB) within that band. In the example of Figure 56A, Options 2-1 and 3-1 are applied to the four CSI-RS resources. Of the four CSI-RS resources, two CSI-RS resources and the other two CSI-RS resources are on different slots. The two CSI-RS resources on the same slot have the same bandwidth and are in the same band, but are at different frequency locations within that band. One CSI-RS resource on slot #1 and one CSI-RS resource on slot #2 have the same bandwidth, are in the same band, and are at the same frequency location within that band. In the example of Figure 56B, Option 2-2 and Option 3-1 are applied to four CSI-RS resources. The four CSI-RS resources are on the same slot #1. Of the four CSI-RS resources, two CSI-RS resources and the other two CSI-RS resources are on different symbols. The two CSI-RS resources on the same symbol have the same bandwidth and are in the same band, but are at different frequency locations within that band. - Option 3-2: Of the four CSI-RS resources, each set of two CSI-RS resources on the same symbol has the same bandwidth but is in a different band. In the example of Figure 57A, Option 2-1 and Option 3-2 are applied to four CSI-RS resources. Of the four CSI-RS resources, two CSI-RS resources and the other two CSI-RS resources are on different slots. Two CSI-RS resources on the same slot have the same bandwidth but are in different bands. One CSI-RS resource on slot #1 and one CSI-RS resource on slot #2 have the same bandwidth, are in the same band, and are at the same frequency location within that band.In the example of Figure 57B, Option 2-2 and Option 3-2 are applied to four CSI-RS resources. The four CSI-RS resources are on the same slot #1. Of the four CSI-RS resources, two CSI-RS resources and the other two CSI-RS resources are on different symbols. The two CSI-RS resources on the same slot have the same bandwidth but are in different bands. One CSI-RS resource on slot #1 and one CSI-RS resource on slot #2 have the same bandwidth, are in the same band, and are at the same frequency position within that band. -◆In Option 3-1 / 3-2, of the four CSI-RS resources, two CSI-RS resources on different symbols may have the same bandwidth and be in the same band.

[0570] ◆ Variation: Embodiment G3 may be applied to three CSI-RS resources, in which case one of the four CSI-RS resources in some of the above examples may not be present.

[0571] According to embodiment G3, the UE can be appropriately configured with multiple existing port CSI-RS resources that are TDM and FDM to support more than 32 ports and can receive / measure them appropriately.

[0572] <Embodiment G4> In the case where the same power offset (powerControlOffset) is supported for multiple legacy port CSI-RS resources, the interpretation of the power offset value for the ratio of the PDSCH EPRE to the NZP CSI-RS resource EPRE assumed when the UE derives CSI may be based on at least one of the following options:

[0573] ◆ Option 1: The UE assumes that the PDSCH signals corresponding to v layers transmitted using all antenna ports of the configured plurality of CSI-RS resources have a ratio of the PDSCH EPRE to the NZP CSI-RS resource EPRE equal to the configured powerControlOffset (the ratio of the PDSCH EPRE to the NZP CSI-RS resource EPRE in the PDSCH signals corresponding to v layers transmitted using all antenna ports of the configured plurality of CSI-RS resources is equal to the configured powerControlOffset). In the example of Figure 58A, powerControlOffset = 0 dB is assumed, four CSI-RS resources are configured that are FDM-multiplexed, and the total bandwidth of the four CSI-RS resources is equal to the bandwidth of the PDSCH. The UE assumes that the ratio of the PDSCH EPRE to the total EPRE of the four CSI-RS resources is equal to powerControlOffset.

[0574] ◆ Option 2: The UE assumes that the PDSCH signals corresponding to the v layers transmitted using the P antenna ports of each configured CSI-RS resource have a ratio of the PDSCH EPRE to the NZP CSI-RS resource EPRE equal to the configured powerControlOffset (the ratio of the PDSCH EPRE to the NZP CSI-RS resource EPRE in the PDSCH signals corresponding to the v layers transmitted using the P antenna ports of each configured CSI-RS resource is equal to the configured powerControlOffset). In the example of Figure 58B, powerControlOffset = 0 dB is assumed, four TDM CSI-RS resources are configured, and the bandwidth of each CSI-RS resource is equal to the bandwidth of the PDSCH. The UE assumes that the ratio of the PDSCH EPRE to the EPRE of each CSI-RS resource is equal to powerControlOffset. According to option 2, the UE does not need to consider whether multiple CSI-RS resources are FDM'd on the same symbol.

[0575] ◆ Option 3: The UE assumes that PDSCH signals corresponding to v layers transmitted using X × P antenna ports of X CSI-RS resources configured on the same symbol have a ratio of the PDSCH EPRE to the NZP CSI-RS resource EPRE equal to the configured powerControlOffset (the ratio of the PDSCH EPRE to the NZP CSI-RS resource EPRE in PDSCH signals corresponding to v layers transmitted using X × P antenna ports of X CSI-RS resources configured on the same symbol is equal to the configured powerControlOffset). In the example of Figure 58C, powerControlOffset = 0 dB is assumed, and four CSI-RS resources that are TDMed and FDMed are configured, with X = 2 CSI-RS resources of the four CSI-RS resources being FDMed on the same first symbol, and the remaining X = 2 CSI-RS resources being FDMed on the same second symbol. The bandwidth of the X=2 CSI-RS resources on each symbol is equal to the bandwidth of the PDSCH, and the UE assumes that the ratio of the EPRE of the PDSCH to the EPRE of the X=2 CSI-RS resources is equal to powerControlOffset.

[0576] Each option may apply to one or more multiplexing types. For example, option 1 may apply to a multiplexing type of FDM transmission. For example, option 2 may apply to a multiplexing type of TDM transmission. For example, option 3 may apply to a multiplexing type of TDM and FDM transmission. One option may be defined in the specification. Which option is used may be configured via RRC.

[0577] In Option 2, if the total maximum power of P CSI-RS resources that are TDMed is equal to the maximum power of the PDSCH, the maximum power of each CSI-RS resource is equal to the maximum power of the PDSCH. In Option 3, if the total maximum power of X CSI-RS resources that are FDMed is equal to the maximum power of the PDSCH, the maximum power of each CSI-RS resource may be less than 1 / X of the maximum power of the PDSCH. Therefore, the powerControlOffset in Option 3 (the ratio of the PDSCH EPRE to the NZP CSI-RS resource EPRE) may be set larger than the powerControlOffset in Option 2. In Option 1, if the total maximum power of Y > X CSI-RS resources that are FDMed is equal to the maximum power of the PDSCH, the maximum power of each CSI-RS resource may be less than 1 / Y of the maximum power of the PDSCH. Therefore, the powerControlOffset ratio in Option 1 may be set larger than the powerControlOffset in Option 3.

[0578] In the case where the same power offset (powerControlOffsetSS) is supported for multiple legacy port CSI-RS resources, the interpretation of the power offset value relative to the ratio of NZP CSI-RS resource EPRE to SSS EPRE assumed when the UE derives CSI may be based on at least one of the following options:

[0579] ◆ Option 1: The UE assumes that the EPRE of the CSI-RS transmitted using all antenna ports of the configured multiple CSI-RS resources is equal to the configured powerControlOffsetSS, based on the ratio of the NZP CSI-RS resource EPRE to the SSS EPRE (the ratio of the NZP CSI-RS resource EPRE to the SSS EPRE for CSI-RS transmitted using all antenna ports of the configured multiple CSI-RS resources is equal to the configured powerControlOffsetSS). In the example of Figure 59A, powerControlOffsetSS = 0 dB is assumed, four CSI-RS resources are configured for FDM, and the total bandwidth of the four CSI-RS resources is equal to the bandwidth of the SS / PBCH block. The UE assumes that the ratio of the total EPRE of the four CSI-RS resources to the SSS EPRE is equal to powerControlOffsetSS.

[0580] ◆ Option 2: The UE assumes that the EPRE of the CSI-RS transmitted using the P antenna ports of each configured CSI-RS resource is equal to the configured powerControlOffsetSS, based on the ratio of the PDSCH EPRE to the NZP CSI-RS resource EPRE (the ratio of the NZP CSI-RS resource EPRE to the SSS EPRE for CSI-RS transmitted using the P antenna ports of the configured CSI-RS resource is equal to the configured powerControlOffsetSS). In the example of Figure 59B, powerControlOffsetSS = 0 dB is assumed, four TDM CSI-RS resources are configured, and the bandwidth of each CSI-RS resource is equal to the bandwidth of the SS / PBCH block. The UE assumes that the ratio of the EPRE of each CSI-RS resource to the SSS EPRE is equal to powerControlOffsetSS. According to option 2, the UE does not need to consider whether multiple CSI-RS resources are FDM'd on the same symbol.

[0581] ◆ Option 3: The UE assumes that the EPRE of the CSI-RS transmitted using X × P antenna ports of the X CSI-RS resources configured on the same symbol is equal to the configured powerControlOffset, based on the ratio of the NZP CSI-RS resource EPRE to the SSS EPRE (the ratio of the NZP CSI-RS resource EPRE to the SSS EPRE for the CSI-RS transmitted using X × P antenna ports of the X CSI-RS resources configured on the same symbol is equal to the configured powerControlOffsetSS). In the example of Figure 59C, powerControlOffsetSS = 0 dB is assumed, four CSI-RS resources are configured to be TDM and FDM-modulated, and X = 2 CSI-RS resources of the four CSI-RS resources are FDM-modulated on the same first symbol, and the remaining X = 2 CSI-RS resources are FDM-modulated on the same second symbol. The bandwidth of the X=2 CSI-RS resources on each symbol is equal to the bandwidth of the SS / PBCH block. The UE assumes that the ratio of the EPRE of the X=2 CSI-RS resources to the SSS EPRE is equal to powerControlOffset.

[0582] Each option may apply to one or more multiplexing types. For example, option 1 may apply to a multiplexing type of FDM transmission. For example, option 2 may apply to a multiplexing type of TDM transmission. For example, option 3 may apply to a multiplexing type of TDM and FDM transmission. One option may be defined in the specification. Which option is used may be configured via RRC.

[0583] According to embodiment G4, the UE can properly interpret the value of powerControlOffset / powerControlOffsetSS.

[0584] (Embodiment H) <Analysis H1> Embodiment F / Embodiment G describes a method for configuring multiple existing port CSI-RS resources for new port CSI-RS resources (using more than 32 ports) and configuration constraints between multiple existing port CSI-RS resources. Essentially, in this extension, one CMR for each codebook type can be considered as multiple existing port CSI-RS resources for an extension of up to 128 ports.

[0585] However, in the CSI extension based on Rel. 18 Doppler CSI ('type II-Doppler-r18') for more than 32 ports (e.g., up to 128 ports), there is insufficient consideration given to aperiodic CMR configuration. In the existing specifications, K (= 4, 8, 12) CMRs are configured within one resource set, and some restrictions are applied to the K CMRs. However, if one CMR in the existing specifications becomes a CSI-RS resource for multiple existing ports, the existing rules or parameters may no longer be applicable.

[0586] <Resource Setting Configuration: Physical Layer Procedures for Data / Physical Downlink Shared Channel-Related Procedures / UE Procedures for CSI Reporting / CSI Framework / Resource Configuration> A UE configured with CSI-ReportConfig with higher layer parameter N4 and reportQuantity set to 'cri-RI-PMI-CQI' expects / assumes that K∈{4, 8, 12} aperiodic (AP) CSI-RS resources or a single periodic (P) or semi-persistent (SP) CSI-RS resource are configured in the channel measurement AP CSI-RS resource set. In the channel measurement AP CSI-RS resource set, the K CSI-RS resources are triggered by the same triggering instance, and the interval between two consecutive CSI-RS resources is m∈{1, 2} slots, configured by higher layer parameters in the higher layer parameter NZP-CSI-RS-ResourceSet. The K AP CSI-RS resources are transmitted in the order of the CSI-RS resource IDs configured in the CSI-RS resource set, and the UE assumes that the K AP CSI-RS resources have the same antenna ports with the same port index.

[0587] If the interference measurement is performed on CSI-IM, only one resource is configured in the csi-IM-ResourceSet, and if the interference measurement is performed on NZP CSI-RS resources, only one resource is configured in the corresponding NZP-CSI-RS-ResourceSet for the interference measurement.

[0588] Analysis H2: For example, in AP CMR for an extended port number, the offset m between two CSI-RS resources may not work. Therefore, the candidate values ​​of K may be reconsidered.

[0589] In the P / SP CMR, only one CMR is configured in the existing specifications. According to embodiment F / embodiment G, such one CMR may correspond to a new port CSI-RS resource. The new port CSI-RS resource may be realized by multiple existing port CSI-RS resources that are transmitted in a TDM / FDM manner using specific constraints. The above-described embodiments can be applied to the new port CSI-RS resource.

[0590] <Report Quantity Configuration: Physical Layer Procedures for Data / Physical Downlink Shared Channel-Related Procedures / UE Procedures for CSI Reporting / CSI Framework / Resource Configuration> A UE configured with CSI-ReportConfig with higher layer parameter N4 and reportQuantity set to 'cri-RI-PMI-CQI' according to UE capabilities is assumed to support UE-side CSI prediction. The reported PMI indicates a predicted precoder matrix associated with N4 consecutive slot intervals, each with a duration of d slots, where the value of N4 ∈ {1, 2, 4, 8} is configured by the higher layer parameter N4. If the UE is configured with an AP CSI-RS resource set for channel measurement, the value of the time unit d ∈ {1, m} expressed in number of slots is configured by the higher layer parameter d, where m is defined in the specification. If the UE is configured with P or SP CSI-RS resources for channel measurement, the value of d is equal to the period of the CSI-RS resources. The earliest slot interval of the N4 slot intervals starts at slot l = n + δ, where n is the uplink slot for which CSI is reported. The slot offset δ ∈ {-n CSI_ref ,0,1,2} is set by the upper layer parameter delta. CSI_ref is defined in the specification. Value δ = -n CSI_ref can be set according to the UE capabilities.

[0591] Analysis H3: Using the new value of m for the AP CMR, the value of d may be reconsidered.

[0592] In the present disclosure, the terms group, set, pool, resource set, and new port CSI-RS resource may be interchangeable. In the present disclosure, the terms existing port CSI-RS resource and AP CSI-RS resource may be interchangeable.

[0593] In an extension based on Rel. 18 Doppler CSI for more than 32 ports (subject to UE capabilities), parameters for AP CSI-RS resources for channel measurements may be based on at least one of several options:

[0594] ◆ Option 1: K groups of CSI-RS resources can be configured within one resource set. Each group may include multiple existing port CSI-RS resources (multiple AP CSI-RS resources) corresponding to new port CSI-RS resources (using more than 32 ports). For example, each group may include four 32-port CSI-RS resources to use 128 ports. Configuration restrictions on CSI-RS resources within one group may follow embodiment F / embodiment G. Configuration restrictions between multiple groups may follow embodiment H2 described below.

[0595] ◆ Option 2: K sets of CSI-RS resources can be configured within one resource set. Each set may include multiple existing port CSI-RS resources (multiple AP CSI-RS resources) corresponding to new port CSI-RS resources (using more than 32 ports). For example, each set may include four 32-port CSI-RS resources to use 128 ports. Configuration restrictions on CSI-RS resources within one set group may follow embodiment F / embodiment G. Configuration restrictions between multiple sets may follow embodiment H2 described below.

[0596] ◆ The K candidate values ​​may be different from the K candidate values ​​{4, 8, 12} in Rel. 18. For example, the smallest candidate value 2 or 6 may be supported. For example, the K candidate values ​​may include at least one of 2 and 6. For example, the existing large candidate value 12 may not be supported. Supported values ​​of K may be reported by the UE capabilities. Supported combinations of K values ​​and the number of new ports or existing port CSI-RS resources may be reported by the UE capabilities. For example, to use 128 ports (or four 32-port CSI-RS resources), the K value supported by the UE may be only 2. For example, to use 64 ports (or two 32-port CSI-RS resources), the K value supported by the UE may be 2 or 4. For example, to use 48 ports (or two 24-port CSI-RS resources), the K value supported by the UE may be 2, 4, or 8.

[0597] According to embodiment H1, the UE can be suitably configured with one or more CMRs using more than 32 ports for a CSI codebook based on Rel. 18 Doppler CSI ('type II-Doppler-r18').

[0598] <Embodiment H2> The setting constraints between multiple groups in option 1 of embodiment H1 or the setting constraints between multiple sets of values ​​in option 2 of embodiment H1 may be based on at least one of the following options.

[0599] ◆ Option 1: K groups / sets are triggered by the same triggering instance.

[0600] ◆ Option 2: The interval between two consecutive groups / sets (out of K groups) is m slots (or d slots). In the example of Figure 60, the interval between two consecutive groups out of K = 4 groups is m slots. For example, m (or d) may be defined in the specifications or may be set by an RRC parameter. Between TDM transmission, FDM transmission, or TDM and FDM transmission of multiple legacy port CSI-RS resources in each group / set, the candidate values ​​of m may be different or the same. The candidate values ​​of m may be based on at least one of the following examples: ◆ Example: In the case of TDM transmission of four legacy port CSI-RS resources, two slots are required for the transmission of one group / set, so the minimum value of m is 2. Larger values ​​of m may be supported. For example, m = 3 or 4 may be supported. -◆ Example: In the case of TDM and FDM transmission of four existing port CSI-RS resources, one slot is required for the transmission of one group / set, so the minimum value of m is 1. Larger values ​​of m may be supported. For example, m=2 may be supported.

[0601] ◆Option 3: The K groups / sets may be transmitted in the order of the group / set IDs, or in a set order.

[0602] ◆ Option 4: When each group / set is considered as a new-port CSI-RS resource, the K groups / sets have the same port number, the same frequency RE occupancy, and the same power offset. In other words, the K groups / sets have, for each group / set, the same port number for each legacy-port CSI-RS resource, the same number of legacy-port CSI-RS resources, the same TDM transmission, or FDM transmission, or TDM and FDM transmission of multiple legacy-port CSI-RS resources, the same BW and RE mapping, and the same power offset. The constraints in embodiment F / embodiment G within a group / set may also be applied across multiple groups / sets.

[0603] ◆ Option 5: The UE assumes that the antenna ports with the same port index in the K groups / sets are the same. The mapping between the antenna ports and the ports of the existing port CSI-RS resources may be the same among the K groups / sets.

[0604] Due to the new value of m, the candidate values ​​of d (for unit time (in the Doppler domain)) in the above-mentioned reporting amount configuration may also be reconsidered. For example, a new candidate value of d, 2, may be added, or the existing candidate value of d, 1, may be deleted. For example, d may be d∈{2,m}. d may be configured by an RRC parameter or according to UE capabilities. The supported candidate values ​​of d may be related to at least one of the number of extension ports, the number of existing port CSI-RS resources, and TDM transmission, FDM transmission, or TDM and FDM transmission.

[0605] According to embodiment H2, the UE can be appropriately configured with multiple groups / sets of CSI-RS resources for a CSI codebook based on Rel. 18 Doppler CSI ('type II-Doppler-r18').

[0606] Supplementary Note on Embodiment H At least one of the following IMR configurations may be used for the configuration of K groups / sets of CSI-RS resources (CMR): ◆ If interference measurement is performed on CSI-IM, only one resource (in the csi-IM-ResourceSet) for interference measurement is configured for K groups / sets of CMR. ◆ If interference measurement is performed on NZP CSI-RS resources, only one resource (in the NZP-CSI-RS-ResourceSet) for interference measurement is configured for K groups / sets of CMR.

[0607] ((Embodiment I))

[0608] <Analysis I> As mentioned above (CSI processing standard), the CPU occupation (O CPU , number of CPUs consumed) are different.

[0609] <Embodiment I1> In CSI processing for the extended CSI-RS, CPU occupancy may be defined for at least one of the following several codebook types: Type 1 single-panel CB for the extended CSI-RS. Type 1 multi-panel CB for the extended CSI-RS. Type 2 CB for the extended CSI-RS (based on the existing Type 2 CB). Type 2 PS CB for the extended CSI-RS (based on the existing Type 2 PS CB). Type 2 CB for the extended CSI-RS based on the extended Type 2 CB for CJT. Type 2 PS CB for the extended CSI-RS based on the additional extended Type 2 PS CB for CJT.

[0610] One or more CPU occupancy rules may be defined. The rules may depend on at least one of the following cases, or may differ depending on the value of at least one of the following cases: - Codebook type; - Number of CSI-RS ports; Number of CSI-RS ports per CSI-RS resource; Number of CSI-RS ports for all CSI-RS resources; - Number of CSI-RS resources; Number of CSI-RS resources for each value of the number of CSI-RS ports; - Antenna configuration (n1-n2 or ng-n1-n2 or ng1-ng2-n1-n2); - Rank configuration; - Parameter combination configuration; - Report quantity configuration; - A combination of two or more of the above cases.

[0611] According to embodiment I1, the UE / base station can appropriately determine / recognize the CPU occupation of CSI processing for the enhanced CSI-RS.

[0612] <Embodiment I2> The CPU occupancy rules may follow at least one of several options:

[0613] - Option 1: O CPU =K S It is. K S may be the number of CSI-RS resources for channel measurement. S = 1. SThe supported values ​​of K may depend on the codebook type. For example, for Type 1 CB (Type 1 Single Panel CB / Type 1 Multi Panel CB), S ≥ 1 is supported, and K for Type 2 CB (Extended Type 2 CB / Additional Extended Type 2 PS CB) S Only =1 may be supported.

[0614] - Option 2: O CPU =X*K S Or O CPU =Σ i=0 K_S X i It is. K S may be the number of CSI-RS resources for channel measurement. X or X i may be reported by the UE capabilities. X or X i may depend on at least one of several cases in embodiment I1. S For example, X may be 1 for CSI-RS resources using more than 32 ports and up to 64 ports, or X may be 2 for CSI-RS resources using more than 64 ports. For example, X may be 1 for CSI-RS resources using 128 ports or less and Type 1 CB, X may be 2 for CSI-RS resources using more than 32 ports and up to 64 ports and Type 2 CB / Type 2 PS CB, or X may be 3 for CSI-RS resources using more than 64 ports and Type 2 CB / Type 2 PS CB.

[0615] - Option 2a: O CPU =X*M, where M may be the number of CSI-RS ports configured for channel measurement. M may be defined in the specification, reported by the UE capabilities, or configured by higher layer parameters. For example, M may be 32.

[0616] - Option 3: O CPU =X+K S Or O CPU =K S +Σ i=0 K_S Xi It is. K S may be the number of CSI-RS resources for channel measurement. X or X i may be reported by the UE capabilities. X or X i may depend on at least one of several cases in embodiment I1.

[0617] Option 4: The CPU occupancy rules may be a reuse / adaptation of the CPU occupancy rules previously defined for the CJT CSI, or may be an update / extension of the CPU occupancy rules previously defined for the CJT CSI. CPU =Y1*X*N TRP Or O CPU =(X+Y2)*N TRP For example, for CSI-RS with more than 32 ports, Y1 or Y2 may be reported according to the UE capabilities. For example, for CSI-RS with 32 or fewer ports, Y1=1 or Y2=0.

[0618] According to embodiment I2, the UE / base station can use appropriate CPU occupancy rules for the enhanced CSI-RS.

[0619] <CSI Calculation Time> The CSI calculation delay requirement 1 (FIG. 61) described above (UE CSI calculation time) indicates (Z1, Z'1) [symbols] for μ∈{0, 1, 2, 3}.

[0620] The CSI calculation delay requirement 2 (FIG. 62) described above (UE CSI calculation time) indicates (Z1, Z'1), (Z2, Z'2), and (Z3, Z'3) [symbols] for μ∈{0, 1, 2, 3, 4, 5, 6}.

[0621] <Embodiment I3> In the CSI processing for the extended CSI-RS, the CSI calculation time may be defined for at least one of the following several codebook types: Type 1 single-panel CB for the extended CSI-RS. Type 1 multi-panel CB for the extended CSI-RS. Type 2 CB for the extended CSI-RS (based on the existing Type 2 CB). Type 2 PS CB for the extended CSI-RS (based on the existing Type 2 PS CB). Type 2 CB for the extended CSI-RS based on the extended Type 2 CB for CJT. Type 2 PS CB for the extended CSI-RS based on the additional extended Type 2 PS CB for CJT.

[0622] One or more CSI calculation times may be defined. The rule may depend on at least one of the following cases, or may differ depending on the value of at least one of the following cases: - Codebook type; - Number of CSI-RS ports; Number of CSI-RS ports per CSI-RS resource; Number of CSI-RS ports for all CSI-RS resources; - Number of CSI-RS resources; Number of CSI-RS resources for each value of the number of CSI-RS ports; - Antenna configuration (n1-n2 or ng-n1-n2 or ng1-ng2-n1-n2); - Rank configuration; - Parameter combination configuration; - Report quantity configuration; - A combination of two or more of the above cases.

[0623] According to embodiment I3, the UE / base station can properly determine / know the CSI calculation time for the enhanced CSI-RS.

[0624] <Embodiment I4> The CSI calculation time may follow at least one of the following options.

[0625] - Option 1: (Z(m), Z'(m)) reuses / repurposes (Z2, Z'2) from the CSI calculation delay requirement 2 mentioned above.

[0626] Option 2: (Z(m), Z'(m)) reuses / reuses (Z2+r, Z'2+r) defined for the CJT codebook described above. The value of r may depend on at least one of several cases in embodiment I3. The value of r may be reported by the UE as the UE capability for each of several cases in embodiment I3.

[0627] Option 3: (Z(m), Z'(m)) reuses / reuses (Z2+r+s, Z'2+r+s) defined for the above-mentioned codebook for CJT. s may be a new parameter for the codebook for the extended CSI-RS. The value of s may depend on at least one of several cases in embodiment I3. The value of s may be reported by the UE as UE capability for each of several cases in embodiment I3.

[0628] - Option 4: In Option 2 / 3, the UE may report at least one value of r and s, where the possible value of at least one of r and s may be 0.

[0629] - Option 5: The UE may report which of options 1 to 4 it supports as UE capabilities.

[0630] According to embodiment I4, the UE / base station can determine an appropriate CSI calculation time for the enhanced CSI-RS.

[0631] ((Embodiment J)) <Consideration J1> Embodiment I considers the extension of CSI processing criteria to use more than 32 ports based on some codebooks. However, it does not consider the extension based on Rel. 18 Doppler CSI. The design may differ between P / SP CMR setting and AP CMR setting.

[0632] <Consideration J2> Embodiment I considers the extension of CSI calculation time for using more than 32 ports based on some codebooks. However, it does not consider the extension based on Rel. 18 Doppler CSI. The design may differ between P / SP CMR setting and AP CMR setting.

[0633] <CSI Processing Standards> According to the process 3-4 (Doppler CSI case) in the above-mentioned "CSI Processing Standards," the processing of CSI reports differs between the AP CMR setting and the P / SP CMR setting. CPU (Number of CPUs consumed) is consumed.

[0634] As with the "CPU Consumption Number" in the "CSI Processing Standards" mentioned above, the existing specifications define the CPU occupation time for the P / SP CMR settings.

[0635] Like the "CPU Occupancy" in the aforementioned "CSI Processing Standards," existing specifications define CPU occupancy time for P / SP CMR settings.

[0636] Existing specifications define CSI-RS resource counting for P / SP CMR configuration, such as "CSI-RS Resource Counting" in the aforementioned "CSI Processing Standard."

[0637] <UE CSI Calculation Time> As described above in "UE CSI Calculation Time," in existing specifications, for N4=1 and N4>1, the UE CSI calculation time may differ between the P / SP CMR setting and the AP CMR setting.

[0638] <Embodiment J1> In an extension based on Rel. 18 Doppler CSI for more than 32 ports (up to 128 ports), for AP CMR setting and P / SP CMR setting, CPU The calculations may be the same or different.

[0639] O CPU The calculation may be based on (or related to) at least one of several factors: Number of new ports (P new ). For example, 48 / 64 / 72 / 96 / 128. ◆ (For AP CMR only) At least one of the number of configured new port CSI-RS resources and the number of groups / sets (K) in embodiment H. ◆ The number of configured existing port CSI-RS resources and the number of existing ports (Plegacy ) and at least one of. For example, four 32-port CSI-RS resources, two 32-port CSI-RS resources, two 24-port CSI-RS resources, X P-port CSI-RS resources. ◆ (For P / SP CMR only) The configured N4 value (DD base length, DD base number). ◆ Additional UE capability indication Y1 for each new port CSI-RS resource, or for each existing port CSI-RS resource, or for each group / set. ◆ Additional UE capability indication Y2 for each N4 value. ◆ Y1 and Y2 may be reported separately or jointly.

[0640] O CPU The calculation may be based on at least one of the following examples: Example 1: CPU = Y1 * K. Here, different P new / P legacy For / K / X / N4 / Y2, Y1 may be the same or different. Example 2: O CPU = Y1 * X * K. Here, different P new / P legacy For / K / X / N4 / Y2, Y1 may be the same or different. ◆ Example 1 / Example 2 may be applied to only the AP CMR. Only the AP CMR may have the configuration of K groups / sets of CSI-RS resources. ◆ Example 3: O CPU = Y1 * X. Here, different P new / P legacy For / K / X / N4 / Y2, Y1 may be the same or different. Example 4: O CPU = Y2 * N4. Here, different P new / P legacy For / K / X / N4 / Y1, Y2 may be the same or different. ◆Example 3 / Example 4 may be applied to AP CMR or P / SP CMR. ◆Note: In addition to the multiplication formula, the same addition formula as in embodiment I (e.g., K+Y1, K*(1+Y1)) may also be applied.

[0641] <<CPU Occupancy of CSI-RS Resources>> In Rel. 18 Doppler CSI-based extensions for more than 32 ports (up to 128 ports), the following procedures may be defined in the specification for P / SP CMR configuration: ◆ (SP-CSI on PUSCH) Reporting is performed for K of new port CSI-RS resources that are not later than the CSI reference resource. P From the first or last symbol of the th most recent consecutive P / SP CSI-RS occasion (or the first or last CSI-RS resource among multiple existing port CSI-RS resources corresponding to the new port CSI-RS resource) P occupies one or more CPUs from the first or last symbol of the th most recent consecutive P / SP CSI-RS occasion) to the last symbol of the PUSCH carrying that report, where K P The value of may be indicated / reported by the UE capability, may be configured by the RRC, or may be defined in the specification. ◆ The CSI reference resource may be a new port CSI-RS resource, or may be the first or last CSI-RS resource of multiple existing port CSI-RS resources corresponding to the new port CSI-RS resource. ◆ K P The value of K can be either the existing value {1,2,4} or a new value. Some of the existing values ​​may be supported. P The value of K P The candidate values ​​of P new / P legacy / K / X / N4 / Y1 / Y2 values. For example, P new If = 48, K P ∈{1,2,4}. For example, P new If = 64, then K P ∈{1,2}. For example, P new If = 128, K P ∈{1}.

[0642] <<CSI-RS Resource Counting>> In Rel. 18 Doppler CSI-based extensions for more than 32 ports (up to 128 ports), the following procedure may be defined in the specification for P / SP CMR configuration: ◆ A CSI-RS resource and a CSI-RS port within that CSI-RS resource are counted by K P Here, K P The value of may be indicated / reported by the UE capabilities, may be configured by the RRC, or may be defined in the specification. P The value of K can be either the existing value {1,2,4} or a new value. Some of the existing values ​​may be supported. P The value of K P The candidate values ​​of P new / P legacy / K / X / N4 / Y1 / Y2 values.

[0643] <<Variation a: CPU Occupancy of CSI-RS Resources>> Embodiment I describes CPU occupancy of CSI-RS resources in extensions based on codebook types other than Rel. 18 Doppler CSI (such as Rel. 15 Type 1, Rel. 16 Extension Type 2, and Rel. 17 Supplemental Extension Type 2) for more than 32 ports (up to 128 ports).

[0644] For extensions based on codebook types other than Rel. 18 Doppler CSI (such as Rel. 15 Type 1, Rel. 16 Extension Type 2, and Rel. 17 Supplemental Extension Type 2) for more than 32 ports (up to 128 ports), the following procedures may be defined in the specification for P / SP CMR configuration. ◆ In the case where CSI-RS resources using more than 32 ports for channel measurement (new port CSI-RS resources) are configured, a P-CSI report or SP-CSI report occupies one or more CPUs from the first or last symbol of the earliest new port CSI-RS resource among one or more new port CSI-RS resources for channel measurement, where the corresponding latest CSI-RS / CSI-IM / SSB is not later than the corresponding CSI reference resource (or from the first or last symbol of the first or last CSI-RS resource among multiple existing port CSI-RS resources corresponding to the new port CSI-RS resource), to the last symbol of the PUSCH / PUCCH carrying the report. ◆ The CSI reference resource may be the new port CSI-RS resource, or the first or last CSI-RS resource of multiple existing port CSI-RS resources corresponding to the new port CSI-RS resource.

[0645] <<Variation b: CSI-RS Resource Counting>> Embodiment I describes CSI-RS resource counting for more than 32 ports (up to 128 ports) in extensions based on codebook types other than Rel. 18 Doppler CSI (such as Rel. 15 Type 1, Rel. 16 Extension Type 2, and Rel. 17 Supplemental Extension Type 2).

[0646] In extensions based on codebook types other than Rel. 18 Doppler CSI (such as Rel. 15 Type 1, Rel. 16 Extension Type 2, and Rel. 17 Supplemental Extension Type 2) for more than 32 ports (up to 128 ports), the following procedures may be defined in the specification for P / SP CMR configuration: ◆ For a CSI-RS resource with more than 32 ports configured for channel measurement (new port CSI-RS resource), if that CSI-RS resource is referenced N times by one or more CSI reporting settings that are not configured with the upper layer parameter csi-ReportSubConfigList, that CSI-RS resource and the CSI-RS ports within that CSI-RS resource are counted T times, where T may be based on at least one of the following options: ◆ Option 1: T = N. ◆ Option 2: T = Z*N. Here, Z may be based on the UE capability report, the RRC configuration, or may be defined in the specification. - Which option is used depends on P new / P legacy / K / X / N4 / Y1 / Y2 values. For example, P new In the case where T is less than or equal to 64, T may be equal to N. For example, P new In the case of >64, T = 2N may be used. -◆The candidate value of Z is P new / P legacy / K / X / N4 / Y1 / Y2 values.

[0647] According to embodiment J1, the CSI processing standard can be appropriately determined.

[0648] <Embodiment J2> In an extension based on Rel. 18 Doppler CSI for more than 32 ports (up to 128 ports), the CSI calculation time may be the same or different between N4 = 1 and N4 > 1 and between the AP CMR setting and the P / SP CMR setting.

[0649] The CSI calculation time may be based on at least one of the following options:new / P legacy / K / X / N4 / Y1 / Y2 values.

[0650] ◆ Option 1 - Condition: K groups / sets are set as AP CMR, and N4 = 1. - ◆ Existing CSI calculation time: (Z2 + 14(K-1)m, Z'2). - ◆ New CSI calculation time: (Z2 + 14(K-1)m+r, Z'2 + r'). Here, r / r' may be defined in the specification as a fixed value, or m / K / P new / P legacy It may also be related to values ​​such as / X / Z2 / Z'2 / Y1 / Y2.

[0651] ◆ Option 2 - Condition: P / SP CMR is set and N4 = 1. - ◆ Existing CSI calculation time: (Z2 + w, Z'2). - ◆ New CSI calculation time: (Z2 + w + r, Z'2 + r'). Here, r / r' may be defined in the specification as a fixed value, or m / K / P new / P legacy It may also be related to values ​​such as / X / Z2 / Z'2 / Y1 / Y2.

[0652] ◆ Option 3 - Condition: K groups / sets are configured as AP CMR and N4>1. - ◆ Existing CSI calculation time: (Z2+14(K-1)m,Z'2) or (Z2+14(K-1)m+Z'2,2Z'2) according to UE capability. - ◆ New CSI calculation time: Same as the existing CSI calculation time, single CSI calculation time or multiple CSI calculation time according to UE capability. As with options 1 / 2, r / r' may be added to the existing CSI calculation time formula. Here, r / r' may be a fixed value defined in the specification, or m / K / P new / P legacy / X / Z2 / Z'2 / Y1 / Y2, etc. ◆ Option 4 - Condition: P / SP CMR is set and N4>1. - ◆ Existing CSI calculation time: (Z2+w,Z'2) or (Z2+w+Z'2,2Z'2) according to UE capability. - ◆ New CSI calculation time: Same as existing CSI calculation time, single CSI calculation time or multiple CSI calculation time according to UE capability. As with options 1 / 2, r / r' may be added to the formula for existing CSI calculation time. Here, r / r' may be defined in the specification as a fixed value, or may be specified using m / K / P new / P legacy It may be related to the values ​​of / X / Z2 / Z'2 / Y1 / Y2 etc. ◆ One of the following options may be applied to the conditions of the other options.

[0653] According to embodiment J2, the CSI calculation time can be appropriately determined.

[0654] ((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.

[0655] 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.

[0656] 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.

[0657] Furthermore, notification of any information to the UE in the above embodiments may be performed periodically, semi-persistently, or aperiodically.

[0658] 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

[0659] 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

[0660] 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)

[0661] <<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.

[0662] 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.

[0663] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0664] Furthermore, any information in the above-described embodiments may be notified from the UE periodically, semi-persistently, or aperiodically.

[0665] <<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.

[0666] The specific UE capability may indicate at least one of the following: ◆ Supporting the specific processing / 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 at least one multiplexing type of FDM transmission, TDM transmission, or TDM and FDM transmission of multiple existing port CSI-RS resources to support CSI-RS of more than 32 ports. At least one of several UE capabilities below may be defined commonly for several multiplexing types, or may be defined for each multiplexing type. ◆ Supporting each setting constraint for each multiplexing type.

[0667] 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).

[0668] 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)).

[0669] If the above conditions are not met, the UE / BS may follow the behavior specified in existing 3GPP releases.

[0670] The information on whether one or more of the above embodiments / options / options apply / are used, or which of several of the above embodiments / options / options 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 the UE capabilities.

[0671] The above embodiments / options / choices may be combined into one embodiment / option / choice.

[0672] In the above embodiments, the RS to be measured may be a QCL source RS in an active / indicated / unified TCI state.

[0673] (Supplementary Notes) The following inventions are supplemented with respect to one embodiment (e.g., embodiment G3) of the present disclosure. [Supplementary Note 1] A terminal including: a receiver that receives a configuration indicating a plurality of channel state information (CSI)-reference signal (RS) resources using more than 32 ports and a CSI codebook for Doppler; and a controller that determines, based on the configuration, at least one of a number of CSI processing units to be occupied for processing the CSI and a calculation time for the CSI. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein the number of CSI processing units is based on at least one of the number of ports, the number of the plurality of CSI-RS resources, the number of groups of the plurality of CSI-RS resources, the number of Doppler domain bases, and capability information. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the number of symbols occupying the CSI processing unit and the number of the plurality of CSI-RS resources and the number of ports counted are based on capability information. [Supplementary Note 4] The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein the calculation time is based on whether the plurality of CSI-RS resources are aperiodic and on the number of Doppler domain bases.

[0674] (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.

[0675] 63 is a diagram showing 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) specified by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.

[0676] 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.

[0677] 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.

[0678] 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))).

[0679] 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.

[0680] 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.

[0681] 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).

[0682] 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.

[0683] 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.

[0684] 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.

[0685] 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.

[0686] 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.

[0687] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0688] 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).

[0689] 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.

[0690] 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.

[0691] 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.

[0692] 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).

[0693] 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.

[0694] 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.

[0695] 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.

[0696] 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.

[0697] 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.

[0698] 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.

[0699] 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.

[0700] 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.

[0701] 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).

[0702] (Base Station) Fig. 64 is a diagram showing an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

[0703] 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.

[0704] 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.

[0705] 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.

[0706] 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.

[0707] 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.

[0708] 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.

[0709] 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.

[0710] 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.

[0711] 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.

[0712] 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.

[0713] 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.

[0714] 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.

[0715] 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.

[0716] 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.

[0717] 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.

[0718] 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.

[0719] 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.

[0720] 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.

[0721] The transceiver 120 may transmit a configuration indicating multiple channel state information (CSI)-reference signal (RS) resources using more than 32 ports and a codebook of CSI for Doppler. The controller 110 may determine at least one of the number of CSI processing units to be occupied in processing the CSI and the calculation time of the CSI based on the configuration.

[0722] (User terminal) Fig. 65 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.

[0723] 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.

[0724] 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.

[0725] 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.

[0726] 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.

[0727] 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.

[0728] 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.

[0729] 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.

[0730] 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.

[0731] 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.

[0732] 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.

[0733] 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.

[0734] 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.

[0735] 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.

[0736] 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.

[0737] 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.

[0738] 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.

[0739] 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.

[0740] The transceiver 220 may receive a configuration indicating multiple channel state information (CSI)-reference signal (RS) resources using more than 32 ports and a codebook of CSI for Doppler. The controller 210 may determine at least one of the number of CSI processing units dedicated to processing the CSI and a calculation time for the CSI based on the configuration.

[0741] The number of CSI processing units may be based on at least one of the number of ports, the number of the plurality of CSI-RS resources, the number of groups of the plurality of CSI-RS resources, the number of Doppler domain bases, and capability information.

[0742] The number of symbols occupying the CSI processing unit, the number of CSI-RS resources and the number of ports counted may be based on capability information.

[0743] The calculation time may be based on whether the plurality of CSI-RS resources are aperiodic or not and the number of Doppler domain bases.

[0744] (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.

[0745] 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.

[0746] 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 66 is a diagram showing 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.

[0747] 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.

[0748] 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.

[0749] 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.

[0750] 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.

[0751] 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.

[0752] 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.

[0753] 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.

[0754] 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...

Claims

1. A terminal having a receiving unit that receives a configuration indicating a plurality of channel state information (CSI)-reference signal (RS) resources using more than 32 ports and a codebook of CSI for Doppler; and a control unit that determines, based on the configuration, at least one of the number of CSI processing units occupied in processing the CSI and the calculation time of the CSI.

2. The terminal of claim 1, wherein the number of CSI processing units is based on at least one of the number of ports, the number of the plurality of CSI-RS resources, the number of groups of the plurality of CSI-RS resources, the number of Doppler domain bases, and capability information.

3. The terminal of claim 1, wherein the number of symbols occupying the CSI processing unit, the number of CSI-RS resources, and the number of ports counted are based on capability information.

4. The terminal of claim 1, wherein the calculation time is based on whether the plurality of CSI-RS resources are aperiodic and on the number of Doppler domain bases.

5. A wireless communication method for a terminal, comprising: receiving a configuration indicating a plurality of channel state information (CSI)-reference signal (RS) resources using more than 32 ports and a codebook of CSI for Doppler; and determining, based on the configuration, at least one of the number of CSI processing units occupied in processing the CSI and the calculation time of the CSI.

6. A base station having: a transmitter that transmits a configuration indicating a plurality of channel state information (CSI)-reference signal (RS) resources using more than 32 ports and a codebook of CSI for Doppler; and a controller that determines at least one of the number of CSI processing units occupied in processing the CSI and the calculation time of the CSI based on the configuration.

Images