Terminal, wireless communication method, and base station

Abstract

One aspect of this disclosure relates to a terminal comprising: a receiving unit that receives settings of a CSI report relating to settings of more than 32 channel state information (CSI)-reference signal (RS) resources associated with each of the channel state information (CSI) resources and settings relating to the number of the antenna ports in two dimensions; and a control unit that controls the transmission of the CSI report, the CSI report including more than one index representing more than one beam for multiple layers corresponding to a first polarization.

Description

Technical Field

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

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

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

[0004] Existing technical documents

[0005] Non-patent literature

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

[0007] The problem that the invention aims to solve

[0008] In future wireless communication systems (e.g., NR), research is underway on how terminals (User Equipment (UE)) can control transmission and reception processing based on information related to Quasi-Co-Location (QCL), Transmission Configuration Indication (TCI) status, and beam.

[0009] However, the measurement / reporting of multiple channel state information-reference signal (CSI-RS) resources used for managing multiple beams has not been adequately studied. Insufficient research on such measurement / reporting raises concerns about potential reductions in communication quality / throughput.

[0010] Therefore, one of the purposes of this disclosure is to provide terminals, wireless communication methods, and base stations that efficiently utilize CSI-RS resources.

[0011] Methods for solving problems

[0012] One aspect of this disclosure relates to a terminal comprising: a receiving unit for receiving settings of a CSI report relating to settings of more than 32 channel state information (CSI)-reference signal (RS) resources associated with each of the channel state information (CSI) resources and settings relating to the number of the antenna ports in two dimensions; and a control unit for controlling the transmission of the CSI report, the CSI report including more than one index relating to one or more beams for multiple layers corresponding to a first polarization.

[0013] Invention Effects

[0014] According to one method disclosed herein, multiple CSI-RS resources can be appropriately measured / reported. Attached Figure Description

[0015] Figure 1 This is a diagram showing an example of the CSI-RS location within a time slot.

[0016] Figure 2 This shows the number of supported CSI-RS ports for a single panel used in existing specifications, and their relationship with the base station antenna layout.

[0017] Figure 3 This shows the number of supported CSI-RS ports for multi-panel setups used in existing specifications, and their relationship to base station antenna layout.

[0018] Figure 4 Showing i for CSI reporting at level 2 1,3An example of the mapping to k1 and k2.

[0019] Figure 5 i shows the CSI reports for Layer 3 and Layer 4 1,3 An example of the mapping to k1 and k2.

[0020] Figure 6 This example shows a codebook with a Level 1 CSI report and codebookMode=1.

[0021] Figure 7 An example is shown for a Level 1 CSI report with codebookMode=2 and N2>1.

[0022] Figure 8 This example shows a codebook for a Level 1 CSI report with codebookMode=2 and N2=1.

[0023] Figure 9 This example shows a codebook with a 2-level CSI report and codebookMode=1.

[0024] Figure 10 An example is shown for a 2-layer CSI report with codebookMode=2 and N2>1.

[0025] Figure 11 An example is shown for a 2-layer CSI report with codebookMode=2 and N2=1.

[0026] Figure 12 This example shows a codebook with a 3-layer CSI report and codebookMode=1-2.

[0027] Figure 13 This example shows a codebook with a 5-level CSI report and codebookMode=1-2.

[0028] Figure 14 This example shows a codebook for a 7-layer CSI report with codebookMode=1-2.

[0029] Figure 15 This example shows a codebook with 8-layer CSI reports and codebookMode=1-2.

[0030] Figure 16 This example illustrates multiple CSI-RS resources that are FDM-enabled.

[0031] Figure 17 This example illustrates one of the multiple CSI-RS resources that are TDM-enabled.

[0032] Figure 18 An example of the settings involved in Option 1 of Implementation B1 is shown.

[0033] Figure 19 The first example of the settings involved in Option 2 of Implementation Method B1 is shown.

[0034] Figure 20 This shows a second example of the settings involved in Option 2 of Implementation B1.

[0035] Figure 21A as well as Figure 21B An example of a base station antenna layout involved in Option 2 of Implementation B1 is shown.

[0036] Figure 22 The first example of the settings involved in option 3 of implementation method B1 is shown.

[0037] Figure 23 This shows a second example of the settings involved in option 3 of implementation method B1.

[0038] Figure 24A as well as Figure 24B An example of a base station antenna layout involved in option 3 of implementation method B1 is shown.

[0039] Figure 25 Showing i for 64CSI-RS port 1,3 An example of the mapping to k1 and k2.

[0040] Figure 26 Showing i for 64CSI-RS port 1,3 Another example of mapping to k1 and k2.

[0041] Figure 27 An example of the codebook for rank 1 and codebook mode 2 involved in the selection branch 1 of implementation C2-2 is shown.

[0042] Figure 28 An example of the codebook for rank 2 and codebook mode 2 involved in the selection branch 1 of implementation C2-2 is shown.

[0043] Figure 29 An example of the codebook for rank 3 and codebook mode 2 involved in the selection branch 3 of implementation C2-2 is shown.

[0044] Figure 30A as well as Figure 30B An example of a new (64,1) setting for the 128-port involved in Implementation I1 is shown.

[0045] Figures 31A to 31CAn example of a new (16,4) setting for the 128-port involved in Implementation I1 is shown.

[0046] Figure 32 An example of option 1-d for the new (16,4) setting of the 128-port involved in embodiment I1 is shown.

[0047] Figure 33 An example of option 2-a for the new (16,4) setting for the 128-port involved in embodiment I1 is shown.

[0048] Figure 34 An example of a candidate for the association of the existing (N1, N2) ports in Option 1 of Implementation I1 is shown.

[0049] Figure 35 An example of a candidate for the association of the existing (N1, N2) ports in Option 1 of Implementation I2-1 is shown.

[0050] Figure 36 An example of a candidate for the association of the existing (N1, N2) ports in Option 1 of Implementation I2-2 is shown.

[0051] Figure 37 An example of a candidate for the association of the existing (N1, N2) ports in Option 1 of Implementation I3 is shown.

[0052] Figure 38 An example of a candidate for the association of the existing (N1, N2) ports in Option 1 of Implementation I4 is shown.

[0053] Figure 39 An example of a candidate for the association of the existing (N1, N2) ports in Option 1 of Implementation I5 is shown.

[0054] Figure 40 This shows one example of a candidate for an association of 32 ports for a multi-panel setup.

[0055] Figure 41 This illustrates an example of multiple CSI-RS resources used for multiple panels.

[0056] Figure 42 An example of SD beam selection based on implementation method B is shown.

[0057] Figure 43 An example of SD beam selection according to embodiment J1 is shown.

[0058] Figure 44 An example of option A of implementation method J1 is shown.

[0059] Figure 45An example of option B of implementation method J1 is shown.

[0060] Figure 46 An example of option C1 of implementation method J1 is shown.

[0061] Figure 47 An example of option C2 of implementation method J1 is shown.

[0062] Figure 48 This shows an example of a report from the SD beamgroup.

[0063] Figure 49 An example of the selection branch 2a of implementation method K1 is shown.

[0064] Figure 50 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment.

[0065] Figure 51 This is a diagram illustrating an example of the structure of a base station according to one embodiment.

[0066] Figure 52 This is a diagram illustrating an example of the structure of a user terminal according to one embodiment.

[0067] Figure 53 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment.

[0068] Figure 54 This is a diagram illustrating an example of a vehicle according to one embodiment. Detailed Implementation

[0069] (CSI report or reporting)

[0070] In Rel.15 NR, a terminal (also known as a user terminal, user equipment (UE), etc.) generates (also known as determining, calculating, estimating, measuring, etc.) Channel State Information (CSI) based on a Reference Signal (RS) (or the resources used by that RS), and sends the generated CSI to the network (e.g., a base station) (also known as reporting, feedback, etc.). This CSI may also be sent to the base station using, for example, an uplink control channel (e.g., the Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (e.g., the Physical Uplink Shared Channel (PUSCH)).

[0071] The RS used in the generation of CSI can be, for example, at least one of the following: Channel State Information Reference Signal (CSI-RS), Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, Synchronization Signal (SS), Demodulation Reference Signal (DMRS)).

[0072] CSI-RS can also include at least one of Non-Zero Power (NZP) CSI-RS and CSI-Interference Management (CSI-Interference Measurement, CSI-IM). An SS / PBCH block is a block containing SS and PBCH (and their corresponding DMRS), and can also be called an SS block (SSB), etc. Furthermore, SS can also include at least one of Primary Synchronization Signal (PSS) and Secondary Synchronization Signal (SSS).

[0073] Additionally, CSI may include at least one of the following: Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SS / PBCH Block Resource Indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), and L1-SNR (Signal to Noise Ratio).

[0074] The UE can also receive information related to CSI reports (report configuration information) and control CSI reporting based on this report configuration information. This report configuration information can be, for example, the "CSI-ReportConfig" of the Information Element (IE) of Radio Resource Control (RRC).

[0075] The report configuration information (e.g., “CSI-ReportConfig” in RRC IE) may also include at least one of the following.

[0076] ◆Information related to the type of CSI report (report type information, such as "reportConfigType" in RRC IE)

[0077] ◆Information related to one or more quantities (quantities) of CSI that should be reported (more than one CSI parameter) (report quantity information, e.g., RRC IE's "reportQuantity")

[0078] ◆Information related to the RS resources used in generating this quantity (the CSI parameter) (resource information, such as "CSI-ResourceConfigId" in RRC IE)

[0079] ◆Information related to the frequency domain of the object being reported by CSI (frequency domain information, such as RRC IE's "reportFreqConfiguration")

[0080] For example, report type information can also indicate periodic CSI (P-CSI) reports, aperiodic CSI (A-CSI) reports, or semi-permanent CSI (SP-CSI) reports.

[0081] In addition, the reporting volume information can also specify a combination of at least one of the above CSI parameters (e.g., CRI, RI, PMI, CQI, LI, L1-RSRP, etc.).

[0082] In addition, resource information can also be the ID of an RS resource. This RS resource may, for example, include a non-zero power CSI-RS resource or SSB, and a CSI-IM resource (e.g., a zero power CSI-RS resource).

[0083] Furthermore, frequency domain information can also represent the frequency granularity of CSI reports. This frequency granularity can include, for example, bandwidth and subbands. Bandwidth is the entire CSI reporting band. Bandwidth can be either the entirety of a certain carrier (component carrier (CC)), cell, serving cell) or the entirety of the bandwidth part (BWP) within a carrier. Bandwidth can also be referred to as the CSI reporting band, the entire CSI reporting band, etc.

[0084] Furthermore, a subband is a part of the bandwidth and can consist of more than one resource block (RB) or physical resource block (PRB). The size of a subband can also be determined based on the size of the bandwidth plan (number of PRBs).

[0085] Frequency domain information can also indicate which PMI is being reported, wideband or subband (frequency domain information may also include, for example, the "pmi-FormatIndicator" of the RRC IE used to determine either wideband PMI reporting or subband PMI reporting). The UE can also determine the frequency granularity of the CSI report (i.e., either wideband PMI reporting or subband PMI reporting) based on at least one of the above reporting quantity information and frequency domain information.

[0086] When a wideband PMI report is set (determined), a wideband PMI can also be reported for the entire CSI report band domain. On the other hand, when a subband PMI report is set, a single wideband indication i1 can be reported for the entire CSI report band domain, and one subband indication i2 (e.g., subband indications of each subband) of each of more than one subband within that CSI report domain can be reported.

[0087] The UE uses the received RS to perform channel estimation and estimates the channel matrix H. The UE then feeds back an index (PMI) determined based on the estimated channel matrix.

[0088] PMI can also represent a precoder matrix (or simply precoder) that the UE considers suitable for use in downlink (DL) transmission for the UE. Each value of PMI can also correspond to a precoder matrix. The set of PMI values ​​can also correspond to a set of different precoder matrices called a precoder codebook (or simply codebook).

[0089] In the space domain, a CSI report may also contain more than one type of CSI. For example, the CSI may include at least one of a first type (Type 1 CSI) used in single-beam selection and a second type (Type 2 CSI) used in multi-beam selection. Single-beam may also be referred to as a single layer, and multi-beam may also be referred to as multiple beams. Furthermore, Type 1 CSI may not assume multiple-user multiple-input multiple-output (MU-MIMO), while Type 2 CSI may assume multiple-user MIMO.

[0090] The codebook mentioned above may also include a codebook for Type 1 CSI (also known as Type 1 codebook, etc.) and a codebook for Type 2 CSI (also known as Type 2 codebook, etc.). In addition, Type 1 CSI may also include Type 1 single-panel CSI and Type 1 multi-panel CSI, and different codebooks (Type 1 single-panel codebook, Type 1 multi-panel codebook) may be specified for each.

[0091] In this disclosure, Type 1 and Type I can also be rewritten as each other. In this disclosure, Type 2 and Type II can also be rewritten as each other.

[0092] The uplink control information (UCI) type can also include at least one of the following: Hybrid Automatic Repeat reQuest ACK knowledgement (HARQ-ACK), scheduling request (SR), or CSI. UCI can be carried via either PUCCH or PUSCH.

[0093] In Rel.15 NR, UCI can include a CSI section for broadband PMI feedback. CSI reports #n include PMI broadband information when reported.

[0094] In Rel.15 NR, the UCI can include two CSI parts for subband PMI feedback. CSI part 1 contains wideband PMI information. CSI part 2 contains one wideband PMI piece and several subband PMI pieces. CSI part 1 and CSI part 2 are encoded independently.

[0095] In Rel.15 NR, the UE is configured with N (N≥1) CSI report settings and M (M≥1) CSI resource settings by higher layers. For example, the CSI report settings (CSI-ReportConfig) include resource settings for channel measurement (resourcesForChannelMeasurement), CSI-IM resource settings for interference (csi-IM-ResourceForInterference), NZP-CSI-RS settings for interference (nzp-CSI-RS-ResourceForInterference), and report quantity. The channel measurement resource settings, CSI-IM resource settings for interference, and NZP-CSI-RS settings for interference are associated with CSI resource settings (CSI-ResourceConfig, CSI-ResourceConfigId), respectively. The CSI resource settings contain a list of CSI-RS resource sets (csi-RS-ResourceSetList, e.g., NZP-CSI-RS resource set or CSI-IM resource set).

[0096] In order to achieve more dynamic channel / interference assumptions for NCJT using FR1 and FR2 as targets, the evaluation and specification of CSI reports for transmission of at least one of the multiple TRPs and multiple panels in DL are being studied.

[0097] (Codebook settings)

[0098] The UE is configured with codebook (CB) related parameters (CodebookConfig) via higher-layer signaling (RRC signaling). The codebook configuration is contained in the CSI report configuration (CSI-ReportConfig) of the higher-layer (RRC) parameters.

[0099] In the codebook settings, select at least one codebook from multiple codebooks that include type I SinglePanel, type I MultiPanel, type II, and type II PortSelection.

[0100] The codebook parameters include parameters related to the codebook subset restriction (CBSR) ("...Restriction" within CodebookConfig). The CBSR setting indicates which PMI reporting bits ("1") and which PMI reporting bits ("0") are allowed or disallowed for the precoder associated with the CBSR bits. One bit of the CBSR bitmap corresponds to one codebook index / antenna port.

[0101] (CSI report settings)

[0102] The Rel.16 CSI report configuration (CSI-ReportConfig) includes codebook configuration, as well as channel measurement resources (CMR) and interference measurement resources (IMR). IMR can be at least one of zero-power interference measurement resources (ZP-IMR) or non-zero power interference measurement resources (NZP-IMR). Parameters in CSI-ReportConfig other than those in codebookConfig-r16 are also included in the Rel.15 CSI report configuration.

[0103] In this disclosure, CMR, NZP CSI-RS resources, and resourcesForChannelMeasurement can be modified accordingly. In this disclosure, ZP-IMR, CSI-IM resources, and csi-IM-ResourcesForInterference can also be modified accordingly. In this disclosure, NZP-IMR, NZP CSI-RS resources for interference measurement, and nzp-CSI-RS-ResourcesForInterference can also be modified accordingly.

[0104] In Rel. 17, an enhanced CSI report configuration (CSI-ReportConfig) for CSI measurements / reporting using NCJT is being investigated. This CSI report configuration sets two CMR groups corresponding to each of the two TRPs. The CMRs within a CMR group can also be used for measurements of at least one of the multi-TRP and single-TRP using NCJT. The N CMR pairs of NCJT are configured via RRC signaling. The UE can also be configured via RRC signaling to determine whether to use the CMR pairs for single-TRP measurements.

[0105] For CSI reports associated with NCJT measurements of multiple TRPs / panels that are set up through a single CSI report, support for at least one of the following options 1 and 2 is being investigated.

[0106] <Option 1>

[0107] The UE is configured to report X (X=0, 1, 2) CSIs associated with single TRP measurement hypotheses and one CSI associated with an NCJT measurement. In the case of X=2, the two CSIs are associated with two different single TRP measurements using different CMR groups.

[0108] <Option 2>

[0109] The UE can also be configured to report a CSI associated with the best measurement result for NCJT and single TRP measurement assumptions.

[0110] As mentioned above, in Rel.15 / 16, the CBSR is set for each codebook setting in each CSI report setting. That is, the CBSR is applied to all CMRs, etc., within the corresponding CSI report setting.

[0111] However, in the CSI report settings for multi-TRP based on CSI report settings in Rel.17, when options 1 and 2 above are applied, it is possible to perform the following measurement settings.

[0112] ◆Option 1 (X=0): Measurement of CSI for NCJT only.

[0113] ◆Option 1 (X=1): Measurement of CSI for NCJT and CSI for a single TRP (one TRP).

[0114] ◆Option 1 (X=2): Measurement of CSI for NCJT and CSI for a single TRP (two TRPs).

[0115] ◆Option 2: Measurement of both NCJT CSI and single TRP CSI.

[0116] Multiple subbands for CSI report #n, indicated and provided by the high-level parameter csi-ReportingBand, can also be consecutively numbered in ascending order, with the lowest subband containing csi-ReportingBand designated as subband 0.

[0117] (PMI / Type 1 Codebook)

[0118] For base station panels, a Type 1 single-panel codebook and a Type 1 multi-panel codebook are defined as Type 1 codebooks (Rel. 15). In a Type 1 single-panel panel, for (N1, N2), the antenna model (antenna configuration) of the CSI antenna port array (logical setting) is defined. The number of CSI-RS antenna ports P CSI-RS It is 2N1N2. In a type 1 multi-panel setup, for the number of CSI-RS antenna ports P CSI-RS and (N) g The antenna model (logically defined) is defined by N1, N2, etc., which represents the CSI antenna port array.

[0119] In this disclosure, the first dimension, N1 dimension, horizontal domain, and vertical domain, and the horizontal domain can also be rewritten. In this disclosure, the second dimension, the dimension perpendicular to the first dimension, N2 dimension, horizontal domain, and vertical domain, and the vertical domain, can also be rewritten. In this disclosure, N1 and N2 can also be substituted for each other, and the horizontal domain and vertical domain can also be substituted for each other.

[0120] In this disclosure, the DFT vector, spatial domain (SD) vector, 2D-DFT vector, SD DFT vector, SD basis vector, SD beam, and SD basis in N1 rows and N2 columns can also be rewritten to each other.

[0121] In this disclosure, port, antenna port, CSI-RS port, port index, and port number can also be interchanged.

[0122] In this disclosure, (N1, N2), the number of two-dimensional antenna ports, antenna settings, and base station antenna layout can also be modified. In this disclosure, N g The number of panels, antenna groups, and antenna port groups can also be rewritten.

[0123] In this disclosure, two polarizations, a first polarization and a second polarization, and horizontal polarization and vertical polarization can also be rewritten as one. In this disclosure, one polarization, one of the first polarization and the second polarization, and one of the horizontal polarization and the vertical polarization can also be rewritten as one. In this disclosure, phase adjustment (co-phasing), phase difference, and phase compensation between polarizations are also included. They can also be rewritten from each other.

[0124] In this disclosure, the Type 1 codebook, the Type 1 single-panel codebook, and the Type 1 multi-panel codebook can also be rewritten to each other.

[0125] (Type 1 Single-panel codebook)

[0126] For Rel.15 Type 1 Single-Panel CSI, for the UE, the higher-level parameter of the codebook type (the subType within type1 in codebookType within CodebookConfig) is set to Type 1 Single-Panel ('typeI-SinglePanel'). In cases where the layer number v ∈ {2,3,4} is not present, the PMI value corresponds to the three codebook indices i. 1,1 i 1,2 ,i2. When the layer number v∈{2,3,4}, the PMI value corresponds to one of the four codebook indices i. 1,1 i 1,2 i 1,3 ,i2. In the case where the layer number v∈{2,3,4} is not, the composite codebook index i1=[i 1,1 i 1,2 In the case of layer number v∈{2,3,4}, the composite codebook index i1=[i 1,1 i 1,2 i 1,3 ].

[0127] For P CSI-RS The specification defines supported settings (combinations of values) for (N1, N2) and (O1, O2). (N1, N2) represent the number of two-dimensional (2D) antenna elements, set by the higher-level parameters n1-n2 within moreThanTwo in nrOfAntennaPorts within typeI-SinglePanel. n1-n2 are bitmap parameters of N1O1N2O2 bits. (O1, O2) are the 2D oversampling factors.

[0128] The precoding matrix for v=1 is represented as W l,m,n （v）The precoding matrix for v=2 is represented as W. l,l',m,m',n （v） Regarding P CSI-RS The precoding matrix for <16 and v=3,4 is represented as W. l,l',m,m',n （v） Regarding P CSI-RS The precoding matrix with ≥16 and v=3,4 is represented as W l,m,p,n （v） The precoding matrix for v=5,6 is represented as W. l,l',l'',m,m',m'',n （v） The precoding matrix for v=7,8 is represented as W. l,l',l'',l''',m,m',m'',m''',n （v） . l,l',l'',l''' through i 1,1 And k1 is determined. m,m',m'',m''' through i 1,2 And k2 is determined. 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.

[0129] The precoding matrix W can be represented as the product of two matrices W1W2. W1 represents the channel property, which is the bandwidth and the long term, and is determined by the codebook index i1 (e.g., i...). 1,1 and i 1,2 (i) is used to represent this. 1,1 and i 1,2 These represent beam selection in two dimensions, respectively. W2 represents the frequency selectivity (subband) and short-term channel characteristics, indicated by the codebook index i2. i2 can also represent the phase adjustment between the two polarizations. W1 can also be given by the following equation E1 using matrix B.

[0130]

[0131] B represents L 2D DFT beams, each of which is oversampled through (O1, O2).

[0132] With rank {1, 5, 6, 7, 8}, the codebook index for each PMI is i. 1,1 i 1,2 , i2. With rank {2, 3, 4}, the codebook index used for each PMI is i 1,1 i 1,2 i 1,3 i2. i 1,3 Mapped to k1 and k2 according to the standard table. In rank = 2, 3, 4, the beams selected for different layers may differ when generating the PMI.

[0133] For a Level 1 CSI report and a codebook with codebookMode = 1, the codebook contains index i corresponding to the horizontal component of the beam. 1,1 =l=0,1,...,N1O1-1, the index i corresponding to the vertical component of the beam. 1,2 =m = 0, 1, ..., N2O2-1, and the corresponding sub-band index i2 = n = 0, 1, 2, 3. Use antenna ports 3000 to 2999+P. CSI-RS The precoding matrix W used in the Level 1 CSI report l,m,n （1） It is given by the following equation E2.

[0134]

[0135] Used for precoding matrices n θ p u m v l,m v ~ l,m It is given by the following equation E3.

[0136]

[0137] Here, [i 1,1 i 1,2 [i2] = [l,m,n]. v l,m It is the DFT vector (SD basis vector, SD beam) in N1 rows and N2 columns, represented by exp(j2πln1 / O1N1)×exp(j2πmn2 / O2N2), n1=0,1,...,N1-1, n2=0,1,...,N2-1, and determined by v,l. l,m This represents a beam. Phase adjustment between two polarizations is... n =exp(jπn / 2), representing the phase difference between the second polarization and the first polarization. θ p This indicates the phase of the second half of the port relative to the phase of the first half of the port.

[0138] (Type 1 Multi-panel Codebook)

[0139] For Rel.15 Type 1 MultiPanel CSI, for the UE, the high-level parameter of the codebook type (the subType within type1 in CodebookConfig) is set to Type 1 MultiPanel ('typeI-MultiPanel'). For Rel.15 Type 1 MultiPanel CSI, compared to Type 1 Single-Panel Codebook, in addition to setting N1 and N2, the number of panels N is also set. g Compared to the Type 1 single-panel codebook, i is added and reported as (wideband) inter-panel phase difference (inter-panel co-phasing, phase compensation between panels). 1,4 For each panel, select the same SD beam (DFT vector v). l,m ,SD base index l,m), only append and report the phase difference between panels.

[0140] For P CSI-RS The specification defines the supported (N) g The settings (combinations of values) for (N1, N2) and (O1, O2) are used. (N1, N2) are set via ng-n1-n2 within typeI-MultiPanel. 1,1 =l={0,1,...,N1O1-1} is the horizontal component of the oversampled SD base. 1,2 =m={0,1,...,N2O2-1} is the vertical component of the oversampled SD substrate. For q=1,...,N g -1 of i 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.

[0141] The antenna setting parameters for a type 1 multi-panel codebook are ng-n1-n2 (N g (N1, N2). In the current specification, rank 4 and above are supported, but rank 5 and above are not supported.

[0142] Each PMI value corresponds to codebook indices i1 and i2. V is the RI value (layer number). 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 ].

[0143] With codebook mode set to 1, for N g=2, i 1,4 =i 1,4,1 For 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 With the number of panels N g And codebook pattern association. Only for N. g =2, supports codebook mode 2. In codebook mode 2, [i 1,4,1 i 1,4,2 These correspond to two polarizations. Each value represents the broadband phase difference between the second panel (panel 1) and the first panel (panel 0) within its respective polarization. Only N is reported. g =2 and i in codebook mode 1 1,4 A value. This value represents the broadband phase difference of the second panel (panel 1) relative to the first panel (panel 0).

[0144] When the codebook mode is set to 2, i2 = [i 2,0 i 2,1 i 2,2 The quantity and value of i2 are associated with the codebook mode and may differ from the Type 1 single-panel codebook. When subband reporting is enabled, i2 is the index for the subband. When wideband reporting is enabled, i2 is the index for the wideband. In codebook mode 1, the quantity and value of i2 are the same as in the Type 1 single-panel codebook, with i2 having one value per subband. In codebook mode 2 (N... g =2), the phase difference of the sub-band has three values, representing the phase difference between polarizations and between panels.

[0145] In codebook mode 2, more phase differences are reported for more accurate CSI, thus incurring greater feedback overhead. Furthermore, codebook mode 2 only applies to N. g =2 is supported.

[0146] Type 1 multi-panel codebooks are based on Type 1 single-panel codebooks. In a Type 1 multi-panel codebook, the codebook for the first panel (panel 0) follows the Type 1 single-panel codebook. The same precoder is applied to the codebooks for the other panels, along with additional phase differences between the panels.

[0147] Used for precoding matrices n a p b p u m vl,m It is given by the following equation E4.

[0148]

[0149] Use antenna port 3000 to 2999+P CSI-RS The precoding matrix used in the v-layer CSI report is via W （v） This indicates that, for the i-th layer and N panels... g The precoding matrix of codebook pattern X is obtained through W l,m,p,n i,N_g,X Indicates. [i 1,1 i 1,2 i 1,4 [i2] = [l,m,p,n].

[0150] For codebook patterns 1 and N g ={2,4}, the precoding matrix W used for Level 1 CSI reporting. l,m,p,n （1） Through W l,m,p,n 1,N_g,1 This indicates that the codebook patterns 1 and N are... g ={2,4}, the precoding matrix W used for Layer 2 CSI reporting. l,l',m,m',p,n （2） By (1 / sqrt(2))[W] l,m,p,n （1,N_g,1） W l',m',p,n （2,N_g,1） ] indicates. Here, for N g W = {2, 4} l,m,p,n 1,N_g,1 and W l,m,p,n 2,N_g,1 (for N) g =2 of W l,m,p,n 1,2,1 and W l,m,p,n 2,2,1 and for N g =4 of W l,m,p,n 1,4,1 and W l,m,p,n 2,4,1 The following equation E5 is given.

[0151]

[0152] here, n =e jπn / 2 For N g =2, p=p1, for N g =4, p = [p1, p2, p3]. p_1 , p_2 , p_3 This 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 . p_1 This indicates the phase difference between the second panel and the first panel. p_2 This indicates the phase difference between the third panel and the first panel. p_3 This indicates the phase difference between the fourth panel and the first panel.

[0153] For codebook patterns 2 and N g =2, precoding matrix W used for Level 1 CSI reporting l,m,p,n （1） Through W l,m,p,n 1,2,1 This indicates that the codebook patterns 2 and N are being discussed. g =2, the precoding matrix W used for Layer 2 CSI reporting. l,l',m,m',p,n （2） By (1 / sqrt(2))[W] l,m,p,n 1,2,2 W l',m',p,n 2,2,2 ] indicates. Here, W l,m,p,n 1,2,2 and W l,m,p,n 2,2,2 It is given by the following equation E6.

[0154]

[0155] 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], n=[n0,n1,n2]. a p_1 This represents the phase difference between the second panel (panel 1) and the first panel (panel 0) in the first polarization. p_2 This represents the phase difference between the second panel (panel 1) and the first panel (panel 0) in the second polarization. n_0This represents the phase difference between the second polarization of the first panel and the first polarization of the first panel for each sub-band. n_1 This represents the phase difference between the first polarization of the second panel and the first polarization of the first panel for each sub-band. n_2 This represents the phase difference between the second polarization of the second panel and the first polarization of the first panel for each sub-band.

[0156] (PMI / Type 2 Codebook)

[0157] In this disclosure, the Type II codebook, the enhanced Type II codebook, the Type II Port Selection (PS) codebook, the enhanced Type II PS codebook, the appended enhanced Type II Port PS codebook, the CJT codebook, and the Doppler codebook can also be rewritten to each other.

[0158] (Type 2 codebook)

[0159] For the type II codebook (Rel.15, type 2CSI), the UE is set to the higher-level parameter codebookType of 'typeII'.

[0160] In this disclosure, a matrix Z with X rows and Y columns is sometimes represented as Z(X×Y).

[0161] In Type 2CSI of Rel.15, for a given layer l, the precoding matrix for each subband (SB-wise) is based on the following equation F1.

[0162] W l (N) t ×N3) = W1W 2,l (F1)

[0163] N t N is the number of antennas / antenna ports. N3 is the total number (subbands) of precoding (beamforming) matrices (precoders) represented by PMI.

[0164] W1(N) t (×2L) represents 2L DFT vectors (oversampled DFT vectors), indicating the chosen spatial domain basis. L∈{2,4} is the number of beams per layer. The actual number of beams considering the two polarizations at point 1 is 2L. For example, the DFT vectors of L = 2 SD beams can also be represented as b i ,b j .

[0165] W 2,l(2L×N3) is a matrix (LC coefficient matrix) consisting of linear combination coefficients (linear combination (LC) coefficients, subband complex LC coefficients, and combination coefficients) for layer l. 2,l This indicates beam selection and the phase difference (co-phasing) between the two polarizations. For example, with L = 2 SD beams b respectively. i ,b j The corresponding LC coefficient is c i ,c j For example, the channel vector h passes through a linear combination c of L = 2 SD beams. i b i ,+c j b j This can be approximated. The overhead of feedback mainly stems from the LC coefficient matrix W. 2,l Furthermore, Rel.15's type 2CSI only supports rank 1 and rank 2.

[0166] In Type 2 CSI, a channel (channel matrix) for a given user is represented by a linear combination of two polarizations and L SD beams. Type 2 CSI in Rel.15 supports rank 1 and rank 2.

[0167] ((Enhanced Type 2 Codebook (Rel.16)))

[0168] For Rel.16 Type 2 CSI (enhanced Type 2 codebook), the UE is set to the higher-level parameter codebookType of 'typeII-r16'.

[0169] Type 2CSI in Rel.16 reduces the frequency domain (FD) compression and the LC coefficient matrix W. 2,l Associated overhead. In addition to supporting rank 1 and 2, Rel.16 type 2CSI also supports rank 3 and 4.

[0170] In Type 2 CSI of Rel.16, for a given precoding matrix W of layer l l It is represented by the following formula F2.

[0171] W l = W1W ~ l W f,l H (F2)

[0172] Rel.15 Type 2CSI W 2,l Through W ~l W f,l H To approximate the representation. Matrix W ~ It can also be represented by a tilde (~) on W. ~ l It can also be represented as W ~ 2,l W f,l H It is W f,l The adjoint matrix can be obtained through W. f,l It is obtained by the conjugate transpose of .

[0173] For CSI reporting, the UE can also be configured with one of two subband sizes. This subband (CQI subband) can also be defined as N. PRB SB The number of consecutive PRBs can also depend on the total number of PRBs within the BWP. The number R of PMI subbands per CQI subband is set via RRC IE (numberOfPMI-SubbandsPerCQI-Subband). R is controlled by the total number N3 of the precoding matrices represented by PMIs as a function of the number of subbands set within the csi-ReportingBand, the subband size set via subbandSize, and the total number of PRBs within the BWP.

[0174] W1(N) t (×2L) represents 2L DFT vectors. To represent this matrix, multiple indices of the SD basis and a two-dimensional oversampling factor are reported.

[0175] W ~ l (2L×M) v The matrix is ​​the LC coefficient matrix. To represent this matrix, the largest K0 non-zero coefficients (NZCs) and the LC coefficients with non-zero amplitudes are reported. The report consists of a bitmap representing the NZC positions and the quantized NZCs.

[0176] W f,l (N3×M) v ) is for layer l of M vEach DFT vector (frequency domain, FD DFT vector, FD basis vector, FD beam) represents the selected frequency domain basis. Each DFT vector uses N3 FD basis vectors (subbands). N3 is the total number of precoding (beamforming) matrices (precoders) represented by PMI as a function of the number of subbands set within the csi-ReportingBand. The csi-ReportingBand represents the continuous or discontinuous subbands within a BWP in the case of CSI being reported for a given BWP. M are available per layer. v FD DFT vectors. In the case where N3 > 19, from the intermediate subset (InS) of size N3' (< N3) M v One FD DFT vector (FD basis) is selected. In the case of N3 ≤ 19, log2(C(N3 - 1, M)2)-1 is reported. v -1) bits. Here, C(N3-1,M) v -1) indicates that M is selected from N3-1 options. v The number of combinations of -1 (combinatorial coefficient), also known as binomial coefficients.

[0177] The frequency response / distribution (frequency response) represented by a linear combination of FD DFT vectors and LC coefficients can also be called FD beam. FD beam can also correspond to a delay profile (time response).

[0178] The PMI subband size is given by the 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 M of FD DFT vectors for a given rank v... v By ceil (p v The number of FD DFT vectors M is given by (×N3 / R). v The same applies to all layers l∈{1,2,3,4}. v It is set through high-level settings.

[0179] Multiple precoding matrices represented by PMI are based on L+M v Each vector is determined.

[0180] For L SD beams (SD DFT vectors) with beam indices i = 0, 1, ..., L-1 m_1^（i）,m_2^（i） It is identified by q1, q2, n1, n2, and by i 1,1 i 1,2 express.

[0181] M v Each FD DFT vector is passed through M initial ∈{-2M v +1, -2M v +2,...,0}、n 3,l =[n 3,l （0） ,...,n 3,l （M_v-1） ]、n 3,l （f） ∈{0,1,...,N3-1} is recognized.

[0182] In the FD DFT vector, the elements (FD basis) with indices t = 0, 1, ..., N3-1 for the FD basis (subband) and elements with layers l = 1, ..., v are y. t,l （f） =exp(j2πtn) 3,l （f） / N3). M for FD DFT vectors v Index f = 0, 1, ..., M v -1 of M v The FD DFT vectors are [y 0,l （f） ,y 1,l （f） ,...,y N_3-1,l （f） ] T .

[0183] W 2,l Each row represents the channel frequency response of a specific SD beam. When the SD beam has high directivity, the channel taps for each beam are limited (the power delay distribution becomes sparse in the time domain). As a result, the channel frequency response for each SD beam has high correlation (approximately flat in the frequency domain). In this case, the channel frequency response can be approximated by a linear combination of a relatively small number of FD DFT vectors. For example, in M... v When = 2, use the FD DFT vector f2,f q and LC coefficient d1 0 ,d2 0 The frequency response associated with SD beam b0 is provided by d1. 0 f2+,d2 0 f q Approximate representation.

[0184] Choose the dominant M v FD DFT vectors. Let M be the number of vectors. v N3, W ~l Expenses and W 2,l Compared to other expenses, it is quite small. v All or a portion of the FD DFT vectors are used to approximate the frequency response of each SD beam. A bitmap is used to report only the FD DFT vectors selected for each SD beam. If no bitmap is reported, all FD DFT vectors are selected for each SD beam. In this case, the NZC of all FD DFT vectors is reported for each SD beam. The number of NZCs K within a layer. l NZ ≤K0=ceil(β×2LM v ), NZC number K across all layers NZ ≤2K0=ceil(β×2LM v β is set at higher levels.

[0185] In the enhanced type 2 codebook, L, β, p v The combination of values ​​(parameter combination) is determined by the higher-level parameter paramCombination-r16 (parameter combination setting). L is the number of SD beams. v It is the number M of the FD basis vectors for rank v. v =ceil(p v The parameter used for calculating (×N3 / R). B is the parameter used for calculating the maximum number of NZCs.

[0186] In this disclosure, the combination of codebook parameters, the combination of codebook parameters, the combination of parameters, and the setting of the combination of parameters can also be rewritten.

[0187] Type 2 CSI feedback on the PUSCH in Rel.16 consists of two parts. CSI Part 1 has a fixed payload size and is used to identify the number of information bits within CSI Part 2. The size of Part 2 is variable (the UCI size depends on the number of NZCs, which is unknown to the base station). The UE reports the number of NZCs within CSI Part 1, which determines the size of CSI Part 2. After receiving CSI Part 1, the base station recognizes the size of CSI Part 2.

[0188] In the Type 2 Enhancement CSI feedback in Rel. 16, CSI Part 1 contains the RI (if reported), CQI, and an indicator of the total number of non-zero amplitude coefficients across multiple layers for Type 2 Enhancement CSI. The RI (if reported), CQI, and the indicator of the total number of non-zero amplitude coefficients across multiple layers, which are fields of Part 1, are encoded independently. CSI Part 2 contains the Type 2 Enhancement PMI. Parts 1 and 2 are encoded separately. CSI Part 2 (PMI) contains the oversampling factor, the index of the SD base corresponding to each SD beam, and the index M of the initial FD DFT vector (starting offset) of the selected DFT window. initial The selected FD substrate for each layer, the NZC (amplitude and phase) for each layer, the strongest coefficient indicator (SCI) for each layer, and the amplitude of the strongest coefficient for each layer / polarization, are at least one of the following:

[0189] Multiple PMI indices (PMI values, codebook indices) associated with different CSI Part 2 information are represented for the l-th layer of rank v by the following equation F21.

[0190] i1 = [i 1,1 i 1,2 i 1,5 i 1,6,1 i 1,7,1 i 1,8,1 (v=1)

[0191] 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)

[0192] 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)

[0193] 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)

[0194] (F21)

[0195] The indices are defined as follows.

[0196] ◆i 1,1 : Rotation factor [q1 q2] in two-dimensional oversampling. q1∈{0,1,...,O1-1}, q2∈{0,1,...,O2-1}. The beam index within each (SD) beam group is selected and determined via i 1,1 Report / Instruction.

[0197] ◆i 1,2 : Multiple indices corresponding to the SD baseplate of each SD beam. i 1,2 ∈{0,1,...,C(N1N2,L)-1}. Select L beam groups from N1N2 (SD) beam groups, and then... 1,2 Report / Instruction.

[0198] ◆i 1,5 : Codebook indicator. The index of the FD basis of the selected DFT window. 1,5 ∈{0,1,..., 2M v -1}.

[0199] ◆i 1,6,l : Codebook indicator. For the FD basis selected for the l-th layer. In the case of N3≤19, i 1,6,l ∈{0,1,...,C(N3-1,M v -1)-1}. In the case of N3>19, i 1,6,l ∈{0,1,...,C(2M v -1,M v -1)-1}.

[0200] ◆i 1,7,l : This refers to the bitmap indicator for the l-th layer. The non-zero bits within this bitmap identify i. 2,4,l and i 2,5,lWhich coefficient within is reported? 1,7,l =[k l,0 （3） ... k l,M_v-1 （3） ]、k l,f （3） =[k l,0,f （3） ... k l,M_v-1,f （3） ]、k l,i,f （3） ∈{0,1}.

[0201] ◆i 1,8,l : The strongest coefficient indicator for the l-th layer (the largest element k within the amplitude coefficient indicator) l,i,f （2） ). Through i 1,8,l The strongest coefficient of layer l identified in ∈{0,1,...,2L-1} for v=1 is given as i 1,8,l =Σ i＝0 i_1^ l,i,0 （3） -1, for 1 < v ≤ 4, is given as i 1,8,l =i l .

[0202] ◆i 2,3,l : An amplitude coefficient indicator for the (broadband) coefficients of the l-th layer (both polarizations). 2,3,l =[k l,0 （1） k l,1 （1） ].

[0203] ◆i 2,4,l : An amplitude coefficient indicator for the reported (sub-band) coefficients of the l-th layer. 2,4,l =[k l,0 （2） ... k l,M_v-1 （2） ].

[0204] ◆i 2,5,l : Phase coefficient indicator for the reported (subband) coefficients of the l-th layer. 2,5,l =[c l,0,f ...c l,M_v-1,f ].

[0205] f l ∈{0,1,...,M v -1} is set as i 2,4,lThe index of i l Let k be the integer ∈{0,1,...,2L-1}. l,f_l^ （2） The index of f. l and i l Identify the strongest coefficients for layer l = 1, ..., v, i.e., the i-th coefficient for layer l. 2,4,l element k l,i_l^ ,f_l^ （2） Codebook index n 3,l Regarding n 3,l （f_l^ ） Remapped to n 3,l （f） = (n 3,l （f） -n 3,l （f_l^ ） ) mod N3, becomes n after remapping. 3,l （f_l^ ） = 0. Index f with respect to f l Remapped to f = (ff l ) mod M v After remapping, it becomes f l =0 (l=1,...,v). i 2,4,l i 2,5,l and i 1,7,l These represent the remapped amplitude coefficient, phase coefficient, and bitmap, respectively.

[0206] W ~ l The reported LC coefficients (complex coefficients) are the amplitude and phase of the separately quantized values.

[0207] ◆Amplitude Quantization

[0208] The polarization-specific reference amplitude is used in a table defined in the specification (amplitude coefficient indicator i). 2,3,l Mapping of elements within: Amplitude coefficient indicator element k l,p （1） To the amplitude coefficient p l,p（1） The 16-level quantization of the mapping. According to the table, p l （1） =[p l,0 （1） p l,1 （1） ] is quantized as [k l,0 （1） k l,1 （1） ]、k l,p （1） ∈{0,...,15}. All other coefficients are obtained using the table defined in the specification (amplitude coefficient indicator i). 2,4,l Mapping of elements within: Amplitude coefficient indicator element k l,i,f （2） To the amplitude coefficient p l,i,f （2） The mapping of p is quantized at level 8. According to the table, p l （2） =[p l,0 （2） ... p l,M_v-1 （2） ]、p l,f （2） =[p l,0,f （2） ... p l,2L-1.f （2） ] Quantized to k l,f （2） =[k l,0,f （2） ... k l,2L-1.f （2） ]、k l,i,f （2） ∈{0,...,7}.

[0209] ◆Phase Quantization

[0210] Amplitude coefficient indicator i 2,5,l The elements within (amplitude coefficient indicator elements) [c l,0 ... c l,M_v-1 Reported via UE (using 4 bits). All phase coefficients are quantized using 16-PSK. The amount used for phase difference... l,i,f = exp(j2πc l,i,f The phase coefficient in / 16) is quantized as c l,f =[c l,0,f ... c l,2L-1.f ]、c l,i,fi ∈{0,...,15}.

[0211] The amplitude coefficient indicator element k corresponding to the strongest coefficient of layer l l,floor（i_l^ / L） （1） =15 (maximum value), amplitude coefficient indicator element k l,i_l^ ,0 （2） =7 (maximum value), phase coefficient indicator element c l,i_l^ ,0 （2） =0 (minimum value). For l = 1,...,v,k l,floor（i_l^ / L） （1） k l,i_l^ ,0 （2） c l,i_l^ ,0 （2） =0 is not reported.

[0212] i 1,5 and i 1,6,l This is the PMI index used for reporting on the FD basis. Only when N3 > 19, i 1,5 Reported.

[0213] By using 3000 to 2999+P CSI-RS The precoding matrix W represented by the codebook used in the CSI report for layers v (=1 to 4) （v） Based on the precoding matrix W for layer l (=1 to v) l Precoding matrix W l It is represented by the following formula F3.

[0214]

[0215] Here, beam indices i = 0, 1, ..., L-1, m1 （i） =O1n1 （i） +q1、m2 （i） =O2n2 （i） +q2、n1 （i） ∈{0,1,...,N1-1}、n2 （i） ∈{0,1,...,N²-1}. n1 （i） n2 （i） This is the SD substrate used to represent SD beam i. m_1^（i）,m_2^（i） p is the DFT vector representing the SD beam. l,0 （1） This represents the amplitude coefficient of the broadband signal. pl,i,f （2） This represents the subband amplitude coefficient. l,i,f This represents the phase coefficient. Thus, the codebook for each layer contains the strongest coefficient for each polarization, the amplitude coefficient for each FD beam and each SD beam for each polarization, and the phase coefficient for each FD beam and each SD beam for each polarization.

[0216] As part of CSI Part 2 grouping, PMI information is grouped into three groups (Groups 0 to 2) for the provided CSI reports. This is important in cases of CSI omission. Index i 2,4,l i 2,5,l i 1,7,l Each reported element is associated with a specific priority rule. Groups 0 to 2 follow the following.

[0217] ◆Group 0: Index i 1,1 i 1,2 i 1,8,l (l = 1, ..., v)

[0218] ◆Group 1: (In the case of being reported) Index i 1,5 Index i (in the case of being reported) 1,6,l i 1,7,l The highest (highest) v2LM within v -floor(K) NZ / 2) priority elements, i 2,3,l i 2,4,l The highest (superior) ceil (K) within NZ / 2) - v priority elements, i 2,5,l The highest (superior) ceil (K) within NZ / 2) - v priority elements (l = 1, ..., v)

[0219] ◆Group 2:i 1,7,l The lowest (lower) floor (K) within NZ / 2) priority elements, i 2,4,l The lowest (lower) floor (K) within NZ / 2) priority elements, i 2,5,l The lowest (lower) floor (K) within NZ / 2) priority elements (l=1,...,v)

[0220] In Type 1 CSI, SD beams, represented using SD DFT vectors, are transmitted towards the UE. In Type 2 CSI, L SD beams are linearly combined and transmitted towards the UE. Each SD beam can be associated with multiple FD DFT vectors (FD beam, FD basis, frequency response). For a given SD beam, the channel frequency response can be obtained from the linear combination of its FD DFT vectors. The channel frequency response corresponds to the power delay distribution.

[0221] (Type 2 Port Selection Codebook)

[0222] For Rel.15 type 2 port selection (PS) CSI (type 2 PS codebook), the UE is set to the higher-level parameter codebookType of 'typeII-PortSelection'.

[0223] In Type 2 Port Selection CSI of Rel.15, the UE does not need to consider the SD DFT vector to derive the SD beam as in Type 2 CSI. The base station considers the set of SD beams and uses K beam-shaped CSI-RS ports to transmit CSI-RS. The UE selects / identifies the best L (≤K) CSI-RS ports per polarity, within W1, and reports their indices. Type 2 PSCSI of Rel.15 supports rank 1 and 2.

[0224] The value of d is set using the higher-level parameter portSelectionSamplingSize. d ∈ {1, 2, 3, 4} and d ≤ min(P CSI-RS / 2,L).

[0225] For each polarization, by i 1,1 Select L antenna ports. 1,1 ∈{0,1,...,ceil(P CSI-RS / (2d))-1}。

[0226] ((Enhanced Type 2 Port Selection Codebook (Rel.16)))

[0227] For Rel.16 type 2PS CSI (enhanced type 2PS codebook), the UE is set to the higher-level parameter codebookType of 'typeII-PortSelection-r16'.

[0228] Except for the selection of the SD beam, the operation of Rel.16 Type 2PS CSI is the same as that of Rel.16 Type 2CSI. Rel.15 Type 2PS CSI supports ranks 1 to 4.

[0229] For layer l∈{1,2,3,4}, the precoding matrix W generated by the precoder for each subband (SB)-wise is... l It is represented by the following formula F4.

[0230] W l (N) t ×N3) = QW1W ~ l W f,l H (F4)

[0231] Here, Q(N) t (×K) represents the K SD beams used for CSI-RS beamforming. W1 (K×2L) is the block diagonal matrix. ~ l (2L×M) is the LC coefficient matrix. W f,l (N³×M) is a matrix consisting of M vectors (FD basis vectors), each containing N³ FD basis vectors. K is set at a higher level. L is set at a higher level. P CSI-RS ∈{4,8,12,16,24,32}. In P CSI-RS When L > 4, L ∈ {2, 3, 4}.

[0232] In Rel.15 / 16 type 2PS CSI, each CSI-RS port #i is connected to the SD beam b. i Establish a connection.

[0233] Similar to Type 2 CSI in Rel.16, Enhanced Type 2 PS CSI changes the number of FD basis vectors from N3 to M. v Cut (M) v N3), thus reducing overhead compared to the type 2PS CSI of Rel.15.

[0234] In the enhanced type 2PS codebook, L, β, p v The combination of values ​​(parameter combination) is determined by the high-level parameter paramCombination-r16 (parameter combination setting).

[0235] ((Added Enhanced Type 2 Port Selection Codebook (Rel.17)))

[0236] For Rel.17 type 2PS CSI / codebook (further enhanced type 2PS codebook), the UE is set to the higher-level parameter codebookType of 'typeII-PortSelection-r17'.

[0237] In Type 2PS CSI of Rel.17, each CSI-RS port #i replaces the SD beam and is paired with the SD-FD beam (SD beam b). i and FD beam f i,j The pairs (where j is the frequency index) are associated. In this example, ports 3 and 4 are associated with the same SD beam and with different FD beams.

[0238] By using delay pre-compensation, the frequency selectivity of the channel frequency response observed in the UE based on the SD beam-FD beam pair can be reduced compared to the frequency selectivity of the channel frequency response observed in the UE based on the SD beam.

[0239] The primary scenario for Rel.17 type 2PS codebooks is FDD. Channel reciprocity based on SRS measurements is imperfect (the angles of the UL and DL beams may differ, the UL and DL frequencies may differ in FDD, and the effective antenna spacing may differ between the UL and DL frequencies). However, the base station can obtain / select several pieces of information (dominant angles and delays (SD and FD beams)). In addition to using CSI reports, SRS measurements in the base station are used, thereby enabling the base station to obtain CSI for decisions regarding the DL MIMO precoder. In this case, to reduce CSI overhead, several CSI reports can be omitted.

[0240] In the appended enhancement type 2PS codebook, the values ​​of α, M, and β (combinations of codebook parameters, parameter combinations) are determined by the higher-level parameter paramCombination-r17 (codebook parameter setting). In the parameter combinations α, M, and β used in the appended enhancement type 2PS codebook of Rel.17, α is the number K1 = αP used for the selected CSI-RS port within the PS codebook. CSI-RS The parameters for calculation are: M is the number of FD basis vectors; B is the parameter for calculating the maximum number of NZCs. The precoding matrix represented by PMI is determined based on L + M vectors. Here, L = K1 / 2, K1 = αP. CSI-RS .

[0241] Based on L vectors vm^（i） (i = 0, 1, ..., L-1), from P CSI-RS Select K1 ports from each port. Vector v m^（i） via m = [m （0） ... [m （L-1） ]、m （i） ∈{0,1,...,P CSI-RS / 2-1} was identified. （i） By index i 1,2 ∈{0,1,...,C(P CSI-RS / 2,L)-1} Report / Instruction.

[0242] In the additional enhancement type 2PS CSI of Rel.17, each CSI-RS port is beamshaped using SD and FD beams. Each port is associated with an SD-FD beam pair.

[0243] For a given precoding matrix W of layer l l It is represented by the following formula F5.

[0244] W l (K×N3) = W1W ~ l W f,l H (F5)

[0245] 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 beampair. The UE selects L ports from the K and reports the index of the selected port to the base station as part of the PMI. Additionally, in Rel.16, each port is associated with an SD beam.

[0246] W ~ l (2L×M) v The matrix is ​​composed of binding coefficients (subband complex LC coefficients). It reports a maximum of K0 NZCs. The report consists of a bitmap representing the NZC location and the quantized NZCs.

[0247] In the additional enhancement type 2PS CSI of Rel.17, K l NZ =Σ i＝0 k1-1 Σ f＝0 M-1 k l,i,f （3） ≤K0 is the number of non-zero coefficients in the layers l=1,...,v, K NZ=Σ l＝1 v K l NZ ≤2K0 is the total number of non-zero coefficients. In the case where v≤2 and K NZ In the case of K1Mv, for layer l=1,...,v, i 1,7,l The bitmap indicator for the l-th layer is not reported. That is, the total number of reported NZCs is equal to the maximum number of K1Mv, and when v≤2, the reporting of the bitmap indicating the location of NZCs is omitted. In addition, in Rel.16, the bitmap of NZC location is always reported.

[0248] W f,l (N3×M) v ) is for each layer consisting of M v (M) v A matrix consisting of 1 or 2 FD basis vectors. Each vector contains N³ FD basis vectors (FD-DFT basis). The base station can also delete W. f,l In M v When W = 1, f,l When set to OFF, the added FD basis vectors are not reported. In M v When W = 2, f,l To enable (ON), M v An additional FD basis vector is reported. In M v When W = 2, the window size N ∈ {2, 4} of the FD basis is set by the higher-level parameter (valueOfN). Additionally, in Rel.16, W... f,l It is always reported.

[0249] (JT)

[0250] Joint transmission (JT) can also refer to the simultaneous transmission of data from multiple points (e.g., TRPs) to a single UE.

[0251] In Rel. 17, non-coherent joint transmission (NCJT) from two TRPs is supported. PDSCH from the two TRPs can also be precoded and decoded independently. Frequency resources can be non-overlapping, partially-overlapping, or fully-overlapping. In the case of overlap, PDSCH from one TRP becomes interference to PDSCH from the other TRPs.

[0252] In Rel.18, support for coherent joint transmission (CJT, mTRP CJT) using up to four TRPs is being investigated. Data from the four TRPs can also be coherently precoded and transmitted to the UE on the same time-frequency resources. For example, considering channels from four TRPs, the same precoding matrix can also be used. "Coherent" can also mean that there is a certain relationship between the phases of multiple received signals. 4TRP joint precoding can also be used to improve signal quality, and there can be no interference between the four TRPs. Data can also be affected only by interference outside the four TRPs.

[0253] (NCJT CSI / Type 1 Codebook)

[0254] In Rel.17, the scenario in which NCJT CSI reporting can be applied is a single-DCI-based MTRP NCJT with a Type 1 single-panel codebook. For NCJT CSI measurements, within a single CSI-ReportConfig, two CMR groups can be configured, each accompanying a channel measurement resource (CMR) from a TRP. A CSI reporting mode can be configured from both modes.

[0255] The CSI-ReportConfig setting for Rel.17 non-coherent joint transmission (NCJT) CSI uses RRC signaling to configure CMR and CSI reporting modes (csi-ReportMode).

[0256] The accompanying K is set by the UE. s =K1 + K2 CMRs in two CMR groups. 2 ≤ K s ≤8. K s Each CMR corresponds to an NZP-CSI-RS resource set used for channel measurement. K1 and K2 are the number of CMRs within the two CMR groups, respectively. N (N groups) of CMR pairs (resource pairs) are configured by the higher layer through selection from all possible pairs. Supports N=1, K... s =2. Supports N max =2 is an optional feature of the UE. K is supported. S,max =X is an optional feature for the UE. Each CMR can include a maximum of 32 CSI-RS ports, depending on the UE's capabilities. Each CMR is associated with a CRI value.

[0257] The bitmap based on RRC signaling represents N (N=1,2) CMR pairs actually used for NCJT measurement by representing one CMR from each CMR group. The UE uses the CMRs within two CMR groups to measure the single TRP CSI for TRP1 and the single TRP CSI for TRP2, and uses N CMR pairs to measure the NCJT CSI.

[0258] The UE selects to report more than one CSI based on the mode (CSI reporting mode) set by csi-ReportMode. csi-ReportMode represents one of the following two modes (NCJT CSI modes): mode 1 and mode 2.

[0259] ◆Mode 1

[0260] The UE can also be configured to report X CSIs associated with a single TRP measurement hypothesis and one CSI associated with an NCJT measurement hypothesis. X = 0, 1, or 2. In the case of X = 2, the two CSIs are associated with two different single TRP measurement hypotheses accompanying multiple CMRs from different CMR groups. Support for X = 1 or 2 is an optional function for UEs supporting option 1.

[0261] ◆Mode 2

[0262] The UE is configured to report a CSI that is associated with the best one within the measurement premise of NCJT and single TRP.

[0263] In Mode 1, the UE reports a total of X+1 CSIs, including X (X = 0, 1, 2) single TRP CSIs and 1 NCJT CSI. In Mode 2, the UE reports the best CSI (1 CSI) from all single TRP CSIs and 1 NCJT CSI.

[0264] A single CSI report can report up to two single TRP CSIs and one NCJT CSI (with X=2 in Mode 1). An NCJT CSI includes one CRI, two RIs (with a joint RI index), two PMIs, two LIs, and one CQI (for levels 4 and below). A single TRP CSI is the same as an existing CSI, including one CRI, one RI / PMI / LI, and one or two CQIs (for levels 8 and below, one CQI per CW).

[0265] Define a new mapping order (table) for multiple fields within a CSI report for the following scenarios.

[0266] ◆Mapping order for Mode 1 Wideband CSI with X=0. Wideband CSI is only supported for Mode 1 with X=0, i.e., NCJT CSI.

[0267] ◆Mapping order for CSI part 1 of modes 1 and 2.

[0268] ◆Mapping order for the CSI part 2 broadband of modes 1 and 2.

[0269] ◆Mapping order for CSI part 2 subbands in modes 1 and 2.

[0270] (CJT CSI / Type 2 Codebook)

[0271] In the ideal scenario (where the four TRPs are co-located (considered to be at the same location), joint estimation of the aggregated channel matrix H is possible, enabling feedback of the joint precoding matrix V. However, the large-scale path losses of the four paths can vary significantly. The joint precoding matrix V based on a constant module codebook is inaccurate. In this case, the feedback from each TRP and the inter-TRP coefficients can be matched using the current Type 2 codebook of the NR.

[0272] For a CJT with a maximum of four TRPs in FR1, the selection of the four TRPs can also be semi-static. Therefore, the setting of this selection, along with the four CMRs (four CSI-RS resources) used for channel measurements, can also be semi-static. Dynamic indication of the four TRPs from a list of CSI-RS resources is also possible, but less likely.

[0273] The path loss from the four TRPs to the UE is different. Therefore, it is difficult to report only one aggregated CSI representing the joint channel matrix.

[0274] Consider the rollback operation to NCJT (i.e., single TRP), and also consider the CSI of each TRP (i.e., single TRP CSI like the NCJT CSI in Rel.17).

[0275] Envisioning ideal backhaul, synchronization, and the same number of antenna ports across multiple TRPs, CSI acquisition for coherent joint transmission (CJT) for FR1 and up to four TRPs is under investigation. For CJT multi-TRP for FDD, improvements to the enhanced (Rel.16) type 2 codebook and the additional enhanced (Rel.17) type 2PS codebook are being investigated.

[0276] For each TRP, W1 (the matrix representing the SD DFT vector) / W f (The matrix representing the FD DFT vector) can be the same or different. For each TRP, W... l (NZC) can also be different. W1 / W for each TRP f / W l They can be selected jointly or individually. For W1 / W f / W l The design is preferably tailored to different scenarios with different options. It can also be reported as a separate piece of content, or it can be included in W. l The internal reporting is as follows. These guidelines cover configuration scenarios (e.g., multiple TRPs within a site or multiple TRPs between sites).

[0277] For example, the precoding matrix used for 4-TRP CJT CSI (codebook) can also be derived from W1 / W for each TRP. f / W l This indicates that W1 for each TRP can be the same or different, and can be selected jointly or individually. W1 for each TRP... l They can also be different; they can be chosen together or individually. W for each TRP f They can be the same or different; they can be chosen together or individually.

[0278] There are two codebook mode settings for FD base selection. In mode 1, i is required. 1,9 The report indicates the FD base offset for the j-th selected CSI-RS resource for j = 2, ..., N. In Mode 2, i is not required. 1,9 Report. All CSI-RS resources have the same FD base selection.

[0279] ◆Mode 1 is the base selection of SD / FD for each TRP / each TRP group. This allows for independent FD base selection across N TRPs / TRP groups. For example, the codebook structure is given by the following equation G1. Here, N is the number of TRPs or TRP groups.

[0280]

[0281] ◆Mode 2 is the SD base selection for each TRP / each TRP group (port group or resource) and the joint / common FD base selection (across N TRPs / TRP groups). For example, this codebook structure is given by the following equation G2. Here, N is the number of TRPs or TRP groups.

[0282]

[0283] In both modes, detailed designs such as parameter combinations, substrate selection, TRP (group) selection, reference amplitude, and W2 quantization methods can also be publicized.

[0284] For CJT to use the enhanced Type II codebook (CJT, Rel.18 CJT Type 2 CSI), the UE can also be set to the higher-level parameter codebookType of 'typeII-CJT-r18'. For CJT to use the further enhanced Type II port selection codebook (CJT, Rel.18 CJT Type 2PS CSI), the UE can also be set to the higher-level parameter codebookType of 'typeII-CJT-PortSelection-r18'.

[0285] The UE can be configured with N within the resource set used for channel measurement. TRP ∈{1,2,3,4} CSI-RS resources.

[0286] In the CJT enhanced type 2 codebook, the high-level parameter paramCombination-CJT-L-r18 is set to {L1,...,L N_TRP The value of N L A set of combinations ∈ {1, 2, 4}. N L The value is set through the higher-level parameter numberOfSDCombinations.

[0287] In the CJT codebook using the appended enhancement type 2PS, the parameter paramCombination-CJT-PS-alpha-r18 is set to {α1,...,α...}. N_TRP The value of N L A set of combinations ∈ {1, 2, 4}. N L The value is set through the high-level parameter numberOfSDCombinations-PS.

[0288] The UE can also be configured with the higher-layer parameter restrictedCMR-Selection. When restrictedCMR-Selection is configured, the number N of selected CSI-RS resources is N. TRP Otherwise, the UE expects for 1≤N≤N TRP Select N CSI-RS resources, this selection uses N TRP The report uses a bitmap of bits.

[0289] In the SD beam selection / report, apply the SD beam selection / report for each CSI-RS resource.

[0290] In CJT using an enhanced type 2 codebook, the precoding matrix represented by PMI is based on Σ j＝1 N L σ_j +M v Several vectors are determined. Here, {σ1,...,σ N} is such that 1≤σ1<…<σ N ≤N TRP The indexes of the N CSI-RS resources selected in ascending order. TRP This can be either setting the number of CSI-RS resources used for CSI reporting, or the number of TRPs used by CJT. σ_1 ,...,L σ_N} is from {L1,...,L N_TRP The value corresponding to the selected combination of}.

[0291] For j = 1,...,N and i = 0,1,...,L σ_j -1, the L corresponding to the j-th selected CSI-RS resource σ_j Vectors v m_1,f^（i）,m_2,f^（i） via i 1,1 i 1,2 Instructions / Reports. Here, i 1,1 i 1,2 It is given by the following formula G3.

[0292] i 1,1 =[i1,1,1 ... i 1,1,N ]

[0293] i 1,1,j =[q 1,j q 2,j ]

[0294] q 1,j ∈{0,1,...,O1-1}

[0295] q 2,j ∈{0,1,...,O2-1}

[0296] i 1,2 =[i 1,2,1 ... i 1,2,N ]

[0297] i 1,2,j ∈{0,1,...,C(N1N2,L σ_j )-1}

[0298] (G3)

[0299] In the CJT with append-enhanced type 2PS codebook, the precoding matrix represented by PMI is based on Σ j＝1 N L σ_j +M vectors are determined. Here, {σ1,...,σ...} N} is such that 1≤σ1<…<σ N ≤N TRP The indexes of the N CSI-RS resources selected in ascending order. σ_j =K 1,σ_j / 2、K 1,σ_j =α σ_j P CSI-RS {α σ_1 ,...,α σ_N} is from {α1,...,α N_TRP The value corresponding to the selected combination of}.

[0300] For j = 1,...,N and i = 0,1,...,L σ_j -1, based on L σ_j Vectors v m_j^（i） P from the j-th selected CSI-RS resource CSI-RS Select K from the ports 1,σ_j Each port, and via i 1,2 Instructions / Reports. Here, i 1,2 It is given by the following formula G4.

[0301] i 1,2=[i 1,2,1 ... i 1,2,N ]

[0302] i 1,2,j ∈{0,1,...,C(P CSI-RS ,L σ_j )-1}

[0303] (G4)

[0304] In this disclosure, CJT codebook, CJT type 2 codebook, CJT enhanced type 2 codebook, Rel.18CJT type 2 codebook, typeII-CJT-r18, CJT appended enhanced type 2PS codebook, Rel.18CJT type 2PS codebook, and typeII-CJT-PortSelection-r18' can also be rewritten in turn.

[0305] (Doppler CSI / Type 2 Codebook)

[0306] Research is underway to enhance / improve CSI reporting for UEs moving at high / medium speeds by utilizing time-domain correlation / Doppler-domain (DD) information. For example, studies are being conducted on improving the enhanced (Rel.16) type 2 codebook, adding the enhanced (Rel.17) type 2 PS codebook, and the time-domain channel characteristics (time-domain correlation distribution) measured from UE reports via tracking RS (Tracking RS (TRS)) without altering the spatial and frequency domain bases.

[0307] Channel coherence time (CCT) depends on maximum Doppler offset. Channel coherence time is the time during which measured channel characteristics can be utilized, or the time until measured channel characteristics can no longer be utilized (channel aging). Maximum Doppler offset is estimated based on the relative velocity between the transmitter and receiver. Channel coherence time T c From 1 / Δf max Approximate representation. Here, Δf max = v / λ. If the UE's moving speed increases, the channel coherence time becomes shorter. For example, at a carrier frequency of 4.5 GHz, if the moving speed exceeds approximately 25 km / h, the channel coherence time is less than 10 ms. How to address such high moving speeds and short channel coherence times becomes a problem.

[0308] TRS is supported to track Doppler shift. However, TRS has the following problems.

[0309] ◆The number of ports for each CSI-RS resource set is limited to one. Each CSI-RS resource uses a single port.

[0310] ◆The settable period is 10ms or more.

[0311] ◆ No CSI reporting is planned for TRS. There are no reporting settings for P-TRS. Reporting can be set, but the report quantity is only set to 'none'. A maximum of 16 CSI-RS resources can be used per CSI-RS resource set.

[0312] TRS are configured in resources in both the time and frequency domains. To measure the effects of Doppler bias, multiple RSs in the time domain are needed within a specific frequency domain resource.

[0313] In the measurement of the effects of Doppler shift, the utilization of CMR is taken into account. However, the RS used for the measurement depends on the UE implementation.

[0314] Information related to Doppler shift is not supported in the quantities reported by CSI. Information used to determine W = W1W2 is reported by the UE via the CSI codebook (PMI). Here, W1 is the broadband characteristic, representing the spatial beam. W2 is the sub-band characteristic, representing the amplitude / phase coefficients for each spatial beam.

[0315] Regarding measurements related to Doppler offset, consider scenario 1 where the UE performs measurements based on CSI-RS and scenario 2 where the base station performs measurements based on SRS. Regarding the determination of the impact related to Doppler offset, consider scenario 1-1 where the UE makes a determination based on CSI-RS measurement results, scenario 1-2 where the base station makes a determination based on CSI-RS measurement results reported by the UE, and scenario 2-1 where the base station makes a determination based on SRS measurement results.

[0316] The CSI-RS measurement window and CSI reporting window are under investigation. Within the CSI-RS measurement window, more than one CSI-RS occasion can be measured. Reported CSIs can also be associated with the CSI reporting window.

[0317] Alternatively, it can be envisioned as a CSI report within time slot n, with the length of the Doppler (DD) / time (TD) basis vectors (DFT basis vectors) (the number of DD / TD basis vectors) set to N4. Within time slot [k,k+W]... meas Within the CSI measurement window of [-1], more than one CSI timing can be measured for CSI reporting calculations. Here, k can also be a slot index, W measIt can also be the measurement window length (number of time slots). The CSI timing can also be set within CSI-ReportConfig. Time slot [l, l+W CSI The CSI report window of [-1] can also be associated with CSI reports within time slot n. Here, l can also be a time slot index, W CSI It can also be the report window length (number of time slots). The location of the CSI reference resource can also be represented as n. ref .

[0318] CSI reporting window duration (W) CSI =dN4. d and N4 are determined by CMR settings. The starting point of the CSI report window is slot l. Alternatively, l = (nN) CSI,ref It can also be l = (n + δ). δ can be either {0, 2} or {0, 1, 2}.

[0319] A d-slot can also be a duration in DD units.

[0320] Assuming UE-side prediction, the base station supports UE prediction of CSI / channel after slot 1. The base station sets the location of slot 1 (from multiple candidate values) via higher-layer signaling. The multiple candidate locations for slot 1 include existing CSI reference resource locations (nN). CSI,ref (n+δ). Here, δ>0. Existing CSI reference resources in existing operations, i.e. (nN) CSI,ref It is reused / repurposed to indicate the location of the last CSI-RS timing used in CSI reporting.

[0321] Regarding the parameter δ, the value 2 can be appended.

[0322] N4 is set by the base station via higher-layer signaling.

[0323] In N4=1, the DD basis can also be the same (identity, identity). DD compression is also not possible. In this case, the codebook structure could be, for example, the following equation H1.

[0324]

[0325] In the case of N4 > 1, the Doppler domain orthogonal DFT basis can also be commonly chosen for all SD / FD basis bases. The codebook structure in this case can also be, for example, the following equation H2.

[0326]

[0327] Only Q > 1 is allowed to represent the number of selected Doppler domain (DD) basis vectors. Detailed design of the SD / FD basis, including associated UCI parameters, follows existing specifications.

[0328] To predict PMI using the enhanced Type II codebook (Rel.18 PMI prediction using Type 2 CSI), the UE can also be set to the higher-level parameter `codebookType` of `typeII-Doppler-r18`. To predict PMI using the further enhanced Type II portselection codebook (Rel.18 PMI prediction using Type 2PS CSI), the UE can also be set to the higher-level parameter `codebookType` of `typeII-Doppler-PortSelection-r18`.

[0329] In this disclosure, the Doppler codebook, the Doppler type 2 codebook, the enhanced type 2 codebook for predicting PMI, the type 2 CSI codebook for predicting PMI in Rel.18, typeII-Doppler-r18, the additional enhanced type 2 PS codebook for predicting PMI in Rel.18, and typeII-Doppler-PortSelection-r18 can also be rewritten in various ways.

[0330] (TDCP Report)

[0331] We are currently investigating time-domain channel properties (TDCP) reported from UEs.

[0332] For the accompanying report quantity (high-level parameter reportQuantity) set to 'tdcp', the high-level parameter Y≥1, and the delay {D1,...,D...} Y The CSI-ReportConfig reported Y TDCP amplitudes k corresponding to the delay. TDCP =[k1 ...k Y Here, k i ∈{0,...,15}. For i=1,...,Y, the corresponding amplitude value is determined according to 1-a i Obtained from k i To a i The mapping is defined in the specification.

[0333] When Y > 1 and the higher-level parameter phase is set, the TDCP phase c is reported. TDCP =[c1 ...c Y Here, c i ∈{0,...,15}. The corresponding phase value is given by exp(j2πc i / 16) is given.

[0334] (CSI-RS port)

[0335] In Rel.15, a DL RS, for example, is used for at least one of the following: channel state information (CSI) acquisition, beam management (BM), beam failure recovery (BFR), and fine-grained tracking of time and frequency. CSI-RS supports 1, 2, 4, 8, 12, 16, 24, and 32 ports (antenna port, CSI-RS port). CSI-RS supports periodic, semi-persistent, and aperiodic transmission. The frequency density of the CSI-RS can be set to adjust overhead and CSI estimation accuracy.

[0336] Figure 1 This is a diagram illustrating an example of CSI-RS location within a time slot. Each row in the table represents the row number, number of ports, frequency domain density, CDM type, time and frequency (time / frequency) location (component resource location (k-bar, l-bar)), code division multiplexing (CDM) group index, and resource locations 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 a port. The k-bar is an underlined symbol for "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.

[0337] As CDM groups, there are no CDM (No CDM, N / A), FD-CDM2, CDM4, and CDM8. FD-CDM2 is a 2-port CSI-RS (FD2) multiplexed in the same time and frequency by multiplying a 2-length frequency domain (FD)-orthogonal cover code (OCC) in RE units. CDM4 is a 4-port CSI-RS (FD2TD2) multiplexed in the same time and frequency by multiplying a 2-length FD-OCC and a 2-length time domain (TD)-OCC in RE units and symbol units. CDM8 is an 8-port CSI-RS (FD2TD4) multiplexed in the same time and frequency by multiplying a 2-length FD-OCC and a 4-length TD-OCC in RE units and symbol units.

[0338] Since the maximum number of ports (32) in CSI-RS is greater than the maximum number of layers (8), the UE can measure a large number of channel states, which can improve measurement accuracy.

[0339] Since Rel.19, research is underway on massive MIMO using more than 32 ports.

[0340] (Base station antenna layout)

[0341] Figure 2 The table shows the relationship between the number of CSI-RS ports supported and the base station antenna layout ((N1,N2) and (O1,O2) settings) for a single panel used in the existing specifications. Figure 3 This shows the supported number of CSI-RS ports and base station antenna layout for multi-panel setups used in existing specifications (N). g The association (table) of (N1,N2) and (O1,O2).

[0342] (A specific example of a Type 1 single-panel codebook)

[0343] In addition to specifying the codebook for the aforementioned Level 1 CSI report and codebook mode = 1, it also specifies a Type 1 single-panel codebook for other codebook modes and at least one of other ranks (levels).

[0344] For the rank {1, 5, 6, 7, 8}, the codebook index for each PMI is i. 1,1 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 1,2Corresponding to two dimensions, i1 is an index used for beam selection. i2 is an index used for the phase difference (co-phasing) between the two polarizations. 1,3 Map to k1 and k2 according to the specification mapping (table). Figure 4 Showing i for CSI reporting at level 2 1,3 Mapping to k1 and k2. Figure 5 i shows the CSI reports for Layer 3 and Layer 4 1,3 Mapping to k1 and k2.

[0345] The specification defines the relationship between the precoding matrix and the codebook index for Level 1 CSI reports and codebookMode=1. Figure 6 ).

[0346] As a codebook for Level 1 CSI reports and codebookMode=2, the specification defines a codebook for N2>1. Figure 7 ), and codebook for N2=1 ( Figure 8 For N² = 1, since there is no oversampling in the N² dimension, therefore i 1,2 It will not be reported.

[0347] The specification defines the codebook for Level 2 CSI reports and codebookMode=1. Figure 9 v l,m as well as n v l,m Corresponds to the first layer. v l',m' as well as- n v l',m' Corresponding to the second layer. The beam for the second layer is determined by l' and m'. l' and m' are respectively determined by i 1,1 +k1 and i 1,2 +k2 is determined. As mentioned above, k1 and k2 are determined by i reported by the UE. 1,3 It was decided.

[0348] As a codebook for Level 2 CSI reports and codebookMode=2, the specification defines a codebook for N2>1. Figure 10 ), and codebook for N2=1 ( Figure 11 For N² = 1, since there is no oversampling in the N² dimension, therefore i 1,2 It will not be reported.

[0349] The specification defines codebooks for 3-level CSI reports and codebookMode=1-2. Figure 12 ). θp This indicates the phase difference between the second half of the port and the first half of the port.

[0350] The structure of the codebook for 4-layer CSI reports and codebookMode=1-2 is the same as that for 3-layer CSI reports and codebookMode=1-2.

[0351] The specification defines codebooks for 5-level CSI reports and codebookMode=1-2. Figure 13 The relation (PMI) for N2>1 is different from the relation (PMI) for N2=1.

[0352] The structure of the codebook for 6-layer CSI reports and codebookMode=1-2 is the same as that for 5-layer CSI reports and codebookMode=1-2.

[0353] The specification defines codebooks for 7-level CSI reports and codebookMode=1-2. Figure 14 The relationship (PMI) varies depending on the values ​​of N1 and N2.

[0354] The structure of the codebook for 8-layer CSI reports and codebookMode=1-2 is the same as that for 7-layer CSI reports and codebookMode=1-2.

[0355] For CSI-RS using more than 32 ports, there has been insufficient research on CSI / codebooks based on Rel.15 Type 1 Single-Panel CSI (Type 1 Single-Panel Codebook).

[0356] (CSI reference resource definition: Data Physical Layer Procedure / Physical Downlink Shared Channel Association Procedure / UE Procedure for CSI Reporting / CSI)

[0357] (CSI Reference Resources)

[0358] The CSI reference resources for the serving cell are defined as follows.

[0359] ◆In the frequency domain, CSI reference resources are defined by a group of multiple DL PRBs corresponding to the band domain associated with the derived CSI.

[0360] ◆In the time domain, the CSI reference resource is transmitted through a single DL slot nn CSI_ref -K offset 2 μ_DL / 2 μ_Koffset Defined. Here, K offsetIt is a parameter set at a higher level; μ_Koffset is specific to K. offset The subcarrier spacing setting is accompanied by a value of 0 in FR1. μ_DL is the subcarrier spacing setting for DL.

[0361] -◆In the P / SP-CSI report, with a single CSI-RS / SSB configured for channel measurements, n CSI_ref It is as it corresponds to the effective DL time slot, 4 2 μ_DL The minimum value above. When multiple CSI-RS / SSBs are configured for channel measurements, n CSI_ref It is as it corresponds to the effective DL time slot, 5 2 μ_DL The minimum value above.

[0362] -◆In the AP-CSI report, if the UE is instructed via DCI to report CSI in the same time slot as the CSI request, n CSI_ref Ensures that a reference resource exists within the same valid DL time slot as the corresponding CSI request; otherwise, n CSI_ref Is it like time slot n? CSI_ref Corresponding to the effective DL time slot, floor (Z' / N) symb slot The minimum value above ) . Here, Z' corresponds to the delay requirement. N symb slot It is the number of symbols in a time slot.

[0363] -◆When CSI-RS / CSI-IM or SSB of P or SP is used for channel / interference measurement, the UE does not expect to measure the channel / interference associated with the CSI-RS / CSI-IM / SSB received before the Z' symbol at the time of the initial OFDM symbol transmission reported by AP-CSI and before the last OFDM symbol is received.

[0364] A time slot within the serving cell is considered a valid DL time slot if it contains at least a DL or flexible symbol set by a higher layer and is not within a measurement gap set for the UE.

[0365] (CSI Reporting Requirements)

[0366] Following a (re)setting of the CSI report, activation of the serving cell, a BWP change, or activation of SP-CSI, the UE shall report a CSI report only if it is not after receiving at least one CSI-RS transmission for channel measurement and one CSI-RS / CSI-IM transmission for interference measurement after the CSI reference resource has been established. Otherwise, the UE shall discard the report.

[0367] For a CSI report configuration (CSI-ReportConfig) that includes a list of sub-configurations provided via csi-ReportSubConfigList, after a CSI report is (re)configured, serving cell is activated, BWP is changed, or SP-CSI is activated, the UE reports a CSI report containing more than one sub-report only if the UE receives at least one CSI-RS transmission for channel measurement and one CSI-RS / CSI-IM for interference measurement for each sub-configuration, not after a CSI reference resource. Otherwise, the UE discards the report. Here, a sub-configuration is a sub-configuration activated / triggered for an SP-CSI report.

[0368] For a CSI-ReportConfig configured within the corresponding CSI-RS resource set, accompanying two resource groups and N resource pairs used for channel measurement, the UE reports a CSI report only if, after the (re)setting of the CSI report, activation of the serving cell, BWP change, or activation of SP-CSI, it receives at least one CSI-RS transmission for each of the multiple CSI-RS resources within the corresponding CSI-RS resource set used for channel measurement, and within the same DRX activation time when DRX is configured, not after the CSI reference resource. Otherwise, the UE discards the report.

[0369] For CSI-ReportConfig configured with codebookType set to 'typeII-CJT-r18' or 'typeII-CJT-PortSelection-r18', after CSI reporting (re)configuration, serving cell activation, BWP change, or SP-CSI activation, the UE reports a CSI report only if, during the same DRX activation time (excluding after a CSI reference resource and if DRX is configured), it receives at least one CSI-RS transmission for each of multiple CSI-RS resources in the corresponding CSI-RS resource set for channel measurement, and one CSI-RS / CSI-IM transmission for a resource in the corresponding resource set for interference measurement. Otherwise, the UE discards the report.

[0370] For CSI-ReportConfig set with codebookType set to 'typeII-Doppler-r18' or 'typeII-Doppler-PortSelection-r18', after CSI report (re)setting, serving cell activation, BWP change, or SP-CSI activation, only if the UE is not after a CSI reference resource and within the same DRX activation time when DRX is set, at least one non-periodic CSI-RS transmission timing, or K, is received for each of the multiple CSI-RS resources in the corresponding CSI-RS resource set used for channel measurement. p In the case of multiple consecutive CSI-RS transmissions occurring periodically or semi-persistently, and a single CSI-RS / CSI-IM transmission for a resource within the corresponding resource set used for interference measurement, the UE reports a CSI report. Otherwise, the UE discards the report. p The values ​​of ∈ {1,2,4} are represented by UE capabilities.

[0371] For CSI-ReportConfig set along with the higher-layer parameter reportQuantity set to 'tdcp', after the (re)setting of CSI reports, serving cell activation, BWP change, or SP-CSI activation, only if the UE is not after the CSI reference resource and within the same DRX activation time when DRX is set, will the K value for the corresponding CSI-RS resource set for channel measurement be received. TRS The UE reports a CSI report after at least one CSI-RS transmission event for each CSI-RS resource within a CSI-RS resource set. Otherwise, the UE discards the report.

[0372] When DRX is enabled, the UE reports a CSI report only if it receives at least one CSI-RS transmission for channel measurement and one CSI-RS / CSI-IM transmission for interference measurement, not after the CSI reference resource and within the DRX activation time. Otherwise, the UE discards the report.

[0373] For the CSI reporting settings within the CSI-ReportConfig on the serving cell where cell DTX is activated, and which are associated with the higher-layer parameter reportQuantity having at least 'RI', the UE reports a CSI report only if the UE receives at least one CSI-RS transmission of each periodic CSI-RS resource or each semi-persistent CSI-RS resource for channel measurement / interference measurement during the activation period of cell DTX, and not after the CSI reference resource. Otherwise, the UE discards the CSI report.

[0374] As described above, multiple UE behaviors are defined by setting multiple values ​​for at least one of the following: the method for setting up reports / resources, the codebook type, and the report quantity.

[0375] (UE assumptions for CQI / PMI / RI calculations)

[0376] The UE envisions that the corresponding PDSCH signal transmitted on the antenna port [3000,...,3000+P+1] has an EPRE ratio relative to the CSI-RS EPRE that is equal to the ratio given by powerControlOffset.

[0377] (UE concept for CQI / PMI / RI calculations used in NCJT)

[0378] The UE is envisioned as transmitting signals targeting v on P antenna ports of multiple CSI-RS resources within group j. j The corresponding PDSCH signal of each layer has an EPRE ratio relative to CSI-RS EPRE equal to the powerControlOffset.

[0379] (UE concept for CQI / PMI / RI calculations used in CJT)

[0380] The UE can also be envisioned as, for the PDSCH signals of v layers, for multiple CSI-RS resources σ j (j=1,...,N0) All have the same ratio of EPRE to CSI-RS EPRE as powerControlOffset.

[0381] (analyze)

[0382] <Analysis 1>

[0383] The CSI feedback differs for several ranks (rank = 2, 3, 4). For example, i 1,3 It is selective feedback.

[0384] It is not possible to select different beams in W1 for different layers. This is based on i 1,1 i 1,2 Selected beam, via i 1,3 The report allows for the selection of additional orthogonal beam (SD) substrates for other layers.

[0385] For example, in the aforementioned two-layer CSI report and codebook mode 1, the beam for the first layer is determined by l and m. l and m are respectively determined by i 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 respectively. 1,1 +k1 and i 1,2 +k2 is determined.

[0386] For several ranks (rank = 5, 6, 7, 8), according to the precoding matrix W in the canonical table, even without i 1,3 Additional feedback also defines different orthogonal beam bases for several other layers. For example, in Figure 15 The codebook for the 8-layer CSI report and codebookMode=1-2 defines the beams for each layer. For layers 1 and 2, beams l and m are respectively transmitted through i 1,1 and i 1,2 The decision is made. For layers 3 and 4, beams l' and m' pass through i respectively. 1,1 +O1 and i 1,2 The decision is made. For layers 5 and 6, beams l'' and m'' pass through i respectively. 1,1 and i 1,2 +O2 is determined. For layers 7 and 8, beams l''' and m''' pass through i respectively. 1,1 +O1 and i 1,2 +O2 was determined.

[0387] <Analysis 2>

[0388] The PMI may differ depending on the codebook pattern (1 and 2).

[0389] In codebook mode 1, the broadband beam is selected from all N1N2O1O2 beams. Phase difference is considered for each sub-band. On the other hand, in codebook mode 2, the broadband beam is selected from either N1O1 or N2O2 beams. For each sub-band, both beam selection and phase difference are considered. For example, in the aforementioned Level 1 CSI report and the codebook of codebook mode 2, the i-th beam representing the broadband beam... 1,1 or i 1,2The beams are selected from either half of N1O1 beams or N2O2 beams, respectively. Regarding i2 for the sub-band, in addition to the variation of n for the phase difference, the selected beam can also be determined according to (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) Change.

[0390] <Analysis 3>

[0391] For different ranks, there are different numbers of CSI-RS ports and different codebook (precoding matrix) structures.

[0392] Consider two different structures of W for different ranks under different cases of CSI-RS port number ≤ 16 and CSI-RS port number > 16.

[0393] The structure A of W applied to ranks 1, 2, 5, 6, 7, 8 and ranks 3 and 4 with ≤16 CSI-RS ports can also be given by the following equation J1.

[0394]

[0395] In structure A, only the phase difference between the two polarizations is considered. In structure A, the number of rows in W is the number of CSI-RS ports, and the number of columns in W is the number of layers. For different layers, the N1N2 row 1 column precoder v can be the same or different. For different layers, the phase difference... It can exist, it can not exist, and it can be - .

[0396] The structure B applied to rank 3,4 with CSI-RS port number > 16 can also be given by the following equation J2.

[0397]

[0398] 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 beam selected for the first half of the ports is the same as the beam selected for the second half of the ports, taking into account the phase difference θ between the second half of the ports and the first half of the ports. This method is used when the number of CSI-RS ports is large. Precoder v ~ It is N1N2 / 2 rows and 1 column.

[0399] <Analysis 4>

[0400] The PMI may differ for different N2 values ​​(N2 > 1 and N2 = 1) and for at least one different n1-n2 (N1 and N2) value.

[0401] For N² = 1, the oversampling factor is 1, and i is not needed. 1,2 The report states that for different n1-n2 values, under different PMI conditions, regarding the selected beam, the beam (i) 1,1 i 1,2 The beam is selected from a subset of N1O1 beams and N2O2 beams. For example, in the aforementioned codebook for a 7-layer CSI report and codebookMode=1-2, for specific values ​​of n1-n2 (N1=4 and N2=1), beam i 1,1 A portion (half) of N1O1 beams is selected. For specific values ​​of n1-n2 (N1>2 and N2=2), beam i 1,2 It is selected from a portion (half) of the N2O2 beams. For a specific value of n1-n2 (N2=1), i 1,2 The report value is 0.

[0402] <Analysis 5>

[0403] In existing CSI reports based on Type 1 codebooks, when multiple CSI-RS resources are configured, the UE selects one CRI and reports it, and reports the RI / LI / PMI / CQI corresponding to the reported CSI-RS resource (CRI).

[0404] In hybrid beamforming scenarios, when the network (NW) wants to perform multi-user (MU) pairing for a specific CSI-RS resource, the NW has CSIs from multiple UEs targeting the same CSI-RS resource. If different UEs select different CSI-RS resources for reporting, the NW faces difficulties in performing MU pairing.

[0405] Consider entrusting multiple UEs to report via CRI-based enhancements, selecting multiple CRIs for reporting, and reporting the RI / LI / PMI / CQI corresponding to each selected CSI-RS resource (CRI).

[0406] Consider the following arguments.

[0407] Argument 1: How to set up multiple CRIs within a single CSI direction and how to report them. For example, the bit size used for multiple CRIs.

[0408] Argument 2: How to determine the mapping order of multiple CSIs corresponding to multiple CRIs.

[0409] - Argument 3: Does there exist some kind of relationship / constraint for multiple CSIs corresponding to multiple CRIs?

[0410] Argument 4: How to set zero power (ZP) - interference measurement resource (IMR) / non-zero power (NZP) - IMR.

[0411] (Research)

[0412] Under investigation: CSI targeting FR1, supporting up to 128 CSI-RS ports. Specifically, the following projects are under investigation.

[0413] ◆Project a: Based on enhancements to the existing codebook, envision an improvement to the existing CSI-RS resources (with up to 32 CSI-RS ports per resource) to support Type 1 codebooks with a total of up to 128 CSI-RS ports across all resources.

[0414] ◆Project b: Without changing any codebook parameters other than the introduction of appended values ​​for the codebook parameters used for the number of ports, based on the enhancement of the existing codebook, we envision (with up to 32 CSI-RS ports per resource) existing CSI-RS resources supporting Type 2 codebook improvements across a total of up to 128 CSI-RS ports across all resources.

[0415] ◆Project c: Enhanced CRI-based CSI reporting (CQI / PMI / RI reporting per CRI for more than one CRI) using up to 32 CSI-RS ports per resource, without a new codebook design, to support hybrid beamforming across a total of up to 128 CSI-RS ports for all resources.

[0416] However, methods for setting up / reporting CSI to support more than 32 CSI-RS ports have not been adequately studied. Without sufficient research into such methods, there are concerns about degraded communication quality / throughput.

[0417] Therefore, the inventors of this invention studied methods for setting / reporting CSI and conceived of the following embodiments.

[0418] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods involved in each embodiment can be applied individually or in combination.

[0419] (Various rewrites)

[0420] In this disclosure, terms enclosed in parentheses "()" may also indicate explanations of the preceding term (e.g., spelling instructions), in other words, specific examples, supplementary explanations, etc. Furthermore, in this disclosure, terms enclosed in square brackets "[]" may be included in the interpretation of the entire article, or may be excluded (ignored) while still interpreting the overall meaning of the article. Additionally, "()" and "[]" may also be used for purposes / meanings other than these.

[0421] In this disclosure, "A / B" and "at least one of A and B" may be rewritten as each other. In addition, in this disclosure, "A / B / C" may also mean "at least one of A, B and C".

[0422] In this disclosure, terms such as notification, activation, deactivation, indication (or indication), selection, configuration, update, and determination can be overridden. Similarly, terms such as support, control, ability to control, operation, and ability to operate can also be overridden.

[0423] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-level parameters, fields, Information Elements (IE), settings, etc., can also be modified interchangeably. In this disclosure, Medium Access Control (MAC) elements (MAC ControlElement (CE)), update commands, activation / deactivation commands, etc., can also be modified interchangeably.

[0424] In this disclosure, higher-layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., messages from the core network, such as positioning protocol messages, such as NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP) messages), or combinations thereof.

[0425] In this disclosure, MAC signaling may also use, for example, a MAC Control Element (MACCE) or a MAC Protocol Data Unit (PDU). Broadcast information may also be, for example, a Master Information Block (MIB), a System Information Block (SIB), a Minimum System Information (Remaining Minimum System Information (RMSI)), or Other System Information (OSI).

[0426] In this disclosure, physical layer signaling may also be, for example, downlink control information (DCI), uplink control information (UCI), etc.

[0427] In this disclosure, ceil(x), the ceiling function, and the floor function can be rewritten interchangeably. In this disclosure, floor(x), the floor function, and the floor function can be rewritten interchangeably. In this disclosure, sqrt(x), the square root of x, and the root of x can be rewritten interchangeably. In this disclosure, x mod y, mod(x, y), the mod function, and the modulo operation can be rewritten interchangeably. In this disclosure, Σ i＝M M+N－1 f(i), Σ i＝M M+N－1 f i For i = M, M+1, ..., M+N-1, f(i) or f i The summation, f(M) + f(M+1) + ... + f(M+N-1), f M +f M+1 +...+f M+N－1 They can also be rewritten interchangeably. C(n,k) can also be related to the number of combinations of choosing k values ​​from n values ​​(combinatorial coefficient) or binomial coefficients. n C k C n k Mutual rewriting. In this disclosure, x / / y and floor(x / y) can also be rewritten as each other.

[0428] In this disclosure, A b A_b, Ab, and expressions with b marked to the right of A can also be rewritten interchangeably. In this disclosure, A c The expressions A^c and A with c marked to the upper right can also be rewritten interchangeably. In this disclosure, A b c The expressions A_b^c, where b is marked in the lower right corner of A and c is marked in the upper right corner of A, can also be rewritten interchangeably. In this disclosure, regarding x... ~ In this context, it can be represented by a tilde (~) on the x-axis, or it can be called an x-shaped wavy line. In this disclosure, regarding x... - In this context, x can be represented by a hyphen (-) or referred to as an x ​​bar. In this disclosure, regarding x... ＾ In other words, it can be represented by ^ on x, or it can be called an x-hat.

[0429] In this disclosure, FR can be at least one of FR1, FR2, FR2-1, FR2-2, FR3, Asia-Pacific Hertz, and Terahertz. In this disclosure, the frequency range corresponding to FR1 can also be 410-7125MHz. In this disclosure, FR2 can also include FR2-1 and FR2-2, the frequency range corresponding to FR2-1 can be 24250-52600MHz, and the frequency range corresponding to FR2-1 can be 52600-71000MHz.

[0430] The following abbreviations may also be used in this disclosure.

[0431] ◆FDM: Frequency Division Multiplexing

[0432] ◆TDM: Time Division Multiplexing

[0433] In this disclosure, the terms "indicate," "report," and "select" can be interchanged.

[0434] In this disclosure, the number of enhanced ports, the number of enhanced CSI-RS ports, and the new P... CSI-RS The number of new ports, the number of ports exceeding 32, and 48 / 64 / 72 / 96 / 128 can also be interchanged. In this disclosure, the existing number of ports, the existing number of CSI-RS ports, and the existing P... CSI-RS Port numbers below 32 can also be rewritten.

[0435] In this disclosure, the settings related to (N1,N2), (N1,N2) settings, (N1,N2) values, n1-n2, antenna settings, antenna configuration, antenna position, gNB antenna, two-dimensional antenna, two-dimensional configuration, two-dimensional position, two-dimensional configuration settings, and the size of the two-dimensional matrix used for antenna configuration / beam selection can also be rewritten.

[0436] In this disclosure, the existing (N1, N2), (N1, N2) settings for the existing number of ports, the settings for a two-dimensional antenna configuration for 32 or fewer ports, and the first settings related to a two-dimensional configuration of multiple antennas for 32 or fewer ports can be modified accordingly. In this disclosure, the new (N1, N2), (N1, N2) settings for an increased number of ports, the settings for a two-dimensional antenna configuration for more than 32 ports, and the second settings related to a two-dimensional configuration of multiple antennas for more than 32 ports can also be modified accordingly. In this disclosure, the new (N1, N2) settings... g1 N g2 The third setting related to the two-dimensional configuration of multiple groups of antennas for increasing the number of ports (N1, N2), the setting for the two-dimensional panel configuration for more than 32 ports, and the setting related to the two-dimensional configuration of multiple groups of antennas associated with multiple CSI-RS resources can also be rewritten.

[0437] In this disclosure, the x-port CSI-RS resource, the CSI-RS resource associated with the x-port, and the CSI-RS resource using the x-port can also be overwritten.

[0438] In this disclosure, CSI-RS resources, existing port CSI-RS resources, CSI-RS, CMR, port groups, groups of 32 or fewer ports, port groups, groups of 32 or fewer ports associated with a CSI-RS resource, CSI-RS resources associated with groups of 32 or fewer ports, CSI-RS resources associated with groups of N1N2O1O2 SD beams based on existing (N1,N2), CSI-RS resources associated with groups of N1N2O1O2 gNB antennas based on existing (N1,N2), existing N1N2O1O2 antennas, and existing N1N2O1O2 SD beams can also be rewritten to each other.

[0439] In this disclosure, groups, sets, blocks, and pools for enhancing port support up to 32 ports can be rewritten interchangeably. In this disclosure, groups, sets, blocks, and pools for enhancing port support based on existing (N1, N2) N1N2O1O2 SD beams can also be rewritten interchangeably. In this disclosure, groups, sets, blocks, pools, and panels for enhancing port support based on existing (N1, N2) N1N2O1O2 gNB antennas can also be rewritten interchangeably.

[0440] In this disclosure, CSI-RS resources for increasing the number of ports, new port CSI-RS resources, enhanced port CSI-RS resources, enhanced CSI-RS, enhanced CMR, new groups, multiple port groups, CSI-RS resources associated with more than 32 ports, CSI-RS resources associated with groups of N1N2O1O2 SD beams based on new (N1,N2), CSI-RS resources associated with groups of N1N2O1O2 gNB antennas based on new (N1,N2), new N1N2O1O2 antennas, and new N1N2O1O2 SD beams can also be rewritten to each other.

[0441] In this disclosure, (N) g1 N g2 The configurations of ng1-ng2, panel settings, gNB panel settings, and CSI-RS resources / port groups / panels / antenna groups (positions / two-dimensional configurations) can also be mutually modified. In this disclosure, N g The settings for ng, gNB panel, and CSI-RS resources / port groups / panels / antenna groups can also be modified.

[0442] In this disclosure, the new N1N2 and N1×N2 based on the new (N1,N2) can also be rewritten in turn. In this disclosure, the existing N1N2 and N1×N2 based on the existing (N1,N2) can also be rewritten in turn.

[0443] In this disclosure, the new N1N2O1O2 and N1O1×N2O2 based on the new (N1,N2) can also be rewritten in turn. In this disclosure, the existing N1N2O1O2 and N1O1×N2O2 based on the existing (N1,N2) can also be rewritten in turn.

[0444] In this disclosure, the positions in the new (N1,N2), the positions of the gNB antennas based on the new (N1,N2), and the positions of the N1N2O1O2 gNB antennas based on the new (N1,N2) can also be rewritten. In this disclosure, the positions in the existing (N1,N2), the positions of the existing (N1,N2) gNB antennas, the positions of the N1N2O1O2 gNB antennas based on the existing (N1,N2), and the positions of the existing N1N2O1O2 gNB antennas can also be rewritten.

[0445] In this disclosure, the SD beams based on the new (N1,N2) and the SD beams in the N1N2O1O2 SD beams based on the new (N1,N2) can also be rewritten. In this disclosure, the positions in the existing (N1,N2) and the SD beams based on the existing (N1,N2) and the SD beams in the N1N2O1O2 SD beams based on the existing (N1,N2) can also be rewritten.

[0446] In this disclosure, (i 1,1 i 1,2 The indices representing beams, including the first index, third index, and two-dimensional index, can also be interchanged. In this disclosure, i 1,4 The index, second index, one-dimensional index, and two-dimensional index of the CSI-RS resource corresponding to the beam can also be rewritten to each other.

[0447] In this disclosure, one or more channel measurement resources, 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 used for channel measurement associated with more than 32 (enhanced port number) ports can also be rewritten. In this disclosure, multiple channel measurement resources, one or more CMRs, multiple existing port CSI-RS resources, and corresponding resource sets used for channel measurement can also be rewritten. In this disclosure, one or more IMRs, one or more CSI-RS / CSI-IM resources used for interference measurement, and corresponding resource sets used for interference measurement can also be rewritten.

[0448] In this disclosure, the timing of channel measurements and the timing of at least one CSI-RS transmission can also be rewritten. In this disclosure, the timing of interference measurements and the timing of CSI-RS / CSI-IM can also be rewritten.

[0449] (Wireless communication method)

[0450] The UE can also measure more than one CSI-RS (resources) using an antenna port with at least one implementation method based on CSI report settings, thereby calculating more than one CSI and reporting the more than one CSI.

[0451] (Implementation Method A)

[0452] <Research>

[0453] Sharing the same CSI-RS resources between existing (e.g., Rel. 15-18, up to 32 ports) CSI-RS and new (e.g., Rel. 19, more than 32 ports) CSI-RS can become difficult. Because existing UEs cannot de-spread the new TD-OCC / FD-OCC, the base station needs to set separate sets of CSI-RS resources for existing (e.g., Rel. 15-18) UEs and new (e.g., Rel. 19) UEs. This incurs CSI-RS overhead. To reduce CSI-RS overhead, the performance improvement from more than 32 CSI-RS ports may be limited.

[0454] <Implementation Method A1>

[0455] Alternatively, no more than 32 ports can be introduced into the same CSI-RS resource (time and frequency resources), and different CSI-RS resources can use different CSI-RS ports. For new UEs, multiple CSI-RS resources can also be aggregated.

[0456] For example, two CSI-RS resources can 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 scenario, sharing CSI-RS resources between existing and new UEs becomes easy. Alternatively, only the first CSI-RS resource can be configured for the existing UE, while both the first and second CSI-RS resources can be configured for the new UE.

[0457] According to this implementation method A1, more than 32 CSI-RS ports can be defined by changing the definition of CSI-RS port mapping, which can reduce the impact on the specification.

[0458] like Figure 16 As in the example, CSI-RS resources #1 and #2 of the FDM can also be configured, 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.

[0459] like Figure 17As in the example, CSI-RS resources #1 and #2 can be configured to be TDM, and CSI-RS resource #1 can be associated with CSI-RS ports #0 to #31, and CSI-RS resource #2 can be associated with CSI-RS ports #32 to #63.

[0460] The size of the time resource for each CSI-RS resource can also be a time slot / sub-time slot / subframe. The size of the frequency resource for each CSI-RS resource can also be PRB / 2. N A series of PRBs (N = -2, -1, 1, 2, ...).

[0461] The method of mapping more than 32 CSI-RS ports across multiple CSI-RS resources can also follow at least one of the following implementation methods A1-X.

[0462] <<Implementation Method A1-1>>

[0463] If the UE is configured with higher-layer parameters activating more than 32 CSI-RS ports, and the UE is configured with x CSI-RS ports and y CSI-RS resources, the UE may also map CSI-RS ports according to at least one of the following rules. X may also be less than 32.

[0464] - The first resource in y CSI-RS resources (or CSI-RS resource sets) is mapped to CSI-RS ports #0 to #x-1.

[0465] - The second resource in a set of y CSI-RS resources (or CSI-RS resource sets) is mapped to CSI-RS ports #x to #2x-1.

[0466] - The 3rd resource in y CSI-RS resources (or CSI-RS resource sets) is mapped to CSI-RS ports #2x to #3x-1.

[0467] - The i-th resource in y CSI-RS resources (or sets of CSI-RS resources) is mapped to CSI-RS ports #(i-1)x to #ix-1. The i-th resource can be either a CSI-RS resource corresponding to the i-th time resource (e.g., a time slot) or a CSI-RS resource corresponding to the i-th frequency resource (e.g., a PRB).

[0468] <<Implementation Method A1-2>>

[0469] Multiple aggregated CSI-RS resources can also be associated with more than 32 CSI-RS ports. Each CSI-RS resource can also be associated with fewer than 32 CSI-RS ports. The multiple CSI-RS resources used for aggregation can also comply with at least one of the following constraints.

[0470] - Option 1: The number of CSI-RS resources used for aggregation is M. For example, M can also be 2.

[0471] - Option 2: The number of ports associated with each CSI-RS resource used for aggregation is fixed at N or more than O (O or more). For example, N could also be 32. For example, O could also be 16.

[0472] - Option 3: Multiple CSI-RS resources used for aggregation are set within the same CSI-RS resource set or CSI-RS resource group.

[0473] Option 4: Multiple CSI-RS resources used for aggregation have the same settings for at least one of the following: density, number of ports, time operation settings, frequency resource configuration, time resource configuration, QCL assumption, scrambling ID, and new scrambling ID. The time operation settings can also represent P, SP, or AP. The frequency resource configuration can be either a bandwidth level or an RB level. The bandwidth level can also be the number of PRBs and the starting PRB. The time resource configuration can also be a time slot level. The QCL assumption can also be associated SSBs. Multiple CSI-RS resources used for aggregation can also have different settings for at least one of the following: time resource configuration, frequency resource configuration, and scrambling ID.

[0474] - Option 5: Multiple CSI-RS resources used for aggregation can be located in either up to M consecutive time slots or in consecutive / comb frequency resources.

[0475] - Example: M = 2 CSI-RS resources can also be aggregated and associated with 64 CSI-RS ports. Each CSI-RS resource can also 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 configured in two consecutive time slots.

[0476] <<Implementation Methods A1-3>>

[0477] In multiple CSI-RS resources with more than 32 ports that are aggregated, several parameters can be added or modified. For example, these parameters can be at least one of density, new scrambling ID, PRB number, and starting PRB. To reduce the complexity of UE measurements, a density lower than the existing density can also be set.

[0478] (Implementation Method B)

[0479] <Research>

[0480] For more than 32 CSI-RS ports, the base station antenna layout and settings have not been adequately studied.

[0481] <Implementation Method B1>

[0482] For new antenna layouts and settings for CSI-RS using more than 32 ports, at least one of the following options can be followed.

[0483] - Option 1

[0484] New (N1, N2) and new (O1, O2) rows can be defined in the specification and assigned to the UE. New rows can also be appended to existing tables. A new row can be used only if CSI-RS using more than 32 ports for the CSI codebook is configured. A new table different from existing tables can also be appended. A new table can also be used only if CSI-RS using more than 32 ports for the CSI codebook is configured; otherwise, existing tables are used.

[0485] Figure 18 An example of the settings involved in Option 1 of Implementation B1 is shown. At least one row in this table may also be supported. The table represents multiple combinations (rows) of the number of CSI-RS ports (>32), (N1, N2), and (O1, O2).

[0486] - Option 2

[0487] (Similar to the settings for multi-panel displays), you can also add an N value to the settings to indicate a combination with at least one of the existing (N1, N2) and (O1, O2) values. g The new parameter ng. This new setting can also be defined in the specification and set for the UE.

[0488] N g It can also be set as a separate parameter from the (N1, N2) setting. For example, it can also be set to represent N separately. g The two parameters ng and n1-n2 of (N1,N2) are given. Figure 19This illustrates a first example of the settings involved in Option 2 of Implementation B1. At least one combination of those in the table can also be supported. The table indicates the number of CSI-RS ports (>32), N... g There are multiple combinations of (N1, N2) and (O1, O2). Different (N1, N2) can also be included in separate lines. Similar to the example in Option 1, (O1, O2) can also be different for different (N1, N2). The line, by reusing the existing multi-port configuration, can also be made without... OK.

[0489] N g It can also be set as a new joint parameter with (N1, N2). For example, it can also be set to represent (N g A parameter ng-n1-n2 of (N1, N2). Figure 20 This illustrates a second example of the settings involved in Option 2 of Implementation B1. At least one row in this table can also be supported. The table indicates the number of CSI-RS ports (>32), new (N) g Multiple combinations (rows) of (N1, N2) and (O1, O2). For The line, by reusing the existing multi-port configuration, can also be made without... OK.

[0490] UE can also be identified as based on N g The value is extended in only one dimension. For example... Figure 21A As in the example, antenna layouts for 64 ports (N g The arrangement (N1, N2) = (2, 8, 2) can also refer to a horizontal arrangement with two antennas (N1, N2) = (8, 2). Figure 21B As in the example, the antenna layout for a 128-port (N) g The arrangement (N1, N2) = (4, 8, 2) can also mean a horizontal layout with four antennas (N1, N2) = (8, 2). In these examples, the spacing between two adjacent antenna elements in the horizontal or vertical direction is d.

[0491] - Option 3

[0492] Alternatively, you can add a value (N) to the settings to indicate a combination with at least one of the existing (N1, N2) and (O1, O2) values. g1 N g2 The new parameters ng1-ng2 are introduced. This new setting can also be defined in the specification and assigned to the UE.

[0493] (N) g1N g2 ) can also be set as a separate parameter from (N1, N2). For example, it is also possible to set parameters that represent (N1, N2) separately. g1 N g2 The two parameters ng1-ng2 and n1-n2 of (N1,N2) are given. Figure 22 This illustrates a first example of the settings involved in Option 3 of Implementation B1. At least one combination of those in the table can also be supported. The table indicates the number of CSI-RS ports (>32), (N... g1 N g2 There are multiple combinations of (N1, N2) and (O1, O2). The line, by reusing the existing multi-port configuration, can also be made without... OK.

[0494] (N) g1 N g2 ) can also be set as a new joint parameter with (N1, N2). For example, it can also be set to represent (N g1 N g2 A parameter ng1-ng2-n1-n2 of (N1, N2). Figure 23 This illustrates a second example of the settings involved in Option 2 of Implementation B1. At least one row in this table can also be supported. The table indicates the number of CSI-RS ports (>32), new (N) g1 N g2 Multiple combinations (rows) of (N1, N2) and (O1, O2). For The line, by reusing the existing multi-port configuration, can also be made without... OK.

[0495] UE can also be identified as based on (N) g1 N g2 The value is expanded in two dimensions. N g1 It can also correspond to N1 (horizontal direction), N g2 It can also correspond to N2 (vertical direction). For example... Figure 24A As in the example, the antenna layout for a 128-port (N) g1 N g2 The arrangement (N1, N2) = (2, 2, 8, 2) can also refer to a layout with two antennas in the horizontal direction and two antennas in the vertical direction (N1, N2) = (8, 2). For example... Figure 24B As in the example, the antenna layout for a 128-port (N) g1 N g2The arrangement (N1, N2) = (4, 1, 8, 2) can also mean that there are four antennas in the horizontal direction and one antenna in the vertical direction. In these examples, the spacing between two adjacent antenna elements in the horizontal or vertical direction is d.

[0496] <<Change>>

[0497] The values ​​of (O1, O2) for each value of (N1, N2) can be defined in the specification or can be set. The values ​​of (O1, O2) can also follow at least one of the following selection branches.

[0498] - Choose branch 1: The value of (O1, O2) is common to all ranks (levels).

[0499] - Choose branch 2: The value of (O1,O2) is different for different ranks. For example, (O1,O2) has a larger value for lower ranks and a smaller value for higher ranks. For example, in (N1,N2) = (16,2), (O1,O2) = (4,4) for ranks 1 to 2, and (O1,O2) = (1,1) for ranks 3 to 8.

[0500] According to this implementation method B1, the UE can be appropriately configured for the base station antenna layout of CSI-RS using more than 32 ports.

[0501] (Implementation Method C)

[0502] <Implementation Method C1>

[0503] For different antenna settings (n1-n2 or ng-n1-n2 or ng1-ng2-n1-n2) for enhanced CSI-RS (using CSI-RS with more than 32 ports), if a type 1 single-panel codebook is supported / set, the codebook design can also be the same as the aforementioned Rel.15 type 1 CSI.

[0504] Existing codebook designs for existing CSI-RS are enhanced by i 1,1 i 1,2 i2 or i 1,1 i 1,2 i 1,3 The range of i2 feedback values ​​and the number of feedback bits can also be enhanced to more than 32 ports.

[0505] Basically, for precoding matrices, i can also be needed (and reported). 1,1 i 1,2 i2 (for several rank i) 1,1 i 1,2 i1,3 The codebook index (i2) can also be used. The existing codebook table mentioned above can also be reused / repurposed, and rank 1 to 8 can be supported for more than 32 ports.

[0506] Since the values ​​of N1O1 or N2O2 are large, therefore, for each rank, i 1,1 i 1,2 The range of feedback values ​​and the number of feedback bits can also be enhanced. For i2, the same granularity can be maintained, or a finer granularity using more bits can be supported. For example, it could also be i2∈{0,1,2,3,4,5,6,7}. For i 1,3 It can maintain the same granularity, or it can define different granularities for different ranks. 1,3 Alternatively, implementation method C2-1 can be followed.

[0507] When reusing / reusing existing codebooks for more than 32 ports, it is preferable to study the aforementioned analyses 1 to 4.

[0508] According to implementation C1, the UE is able to report the appropriate codebook for CSI-RS using more than 32 ports.

[0509] <Implementation Method C2>

[0510] Implementation C2 relates to a codebook for enhancing CSI-RS.

[0511] <<Implementation Method C2-1>>

[0512] Regarding whether i is needed 1,3 The report can be defined in the specification or set by the RRC.

[0513] Do I need i? 1,3 The definition / setting of the report can also be applied by following at least one of the following options.

[0514] - Option 1: Is i needed? 1,3 The definition / setting of a report can be applied to a specific rank or to all ranks. For example, whether i is required. 1,3 The definition / setting of the report can also be applied to a part of multiple ranks.

[0515] - Option 2: Is i needed? 1,3 The report definition / settings can be applied to a specific number of CSI-RS ports or can be applied universally to all CSI-RS ports. For example, whether i is required 1,3 The report definition / settings can also be applied to more than X CSI-RS ports.

[0516] - Option 3: Is i required? 1,3 The report's definition / settings can be applied to specific antenna settings (n1-n2 or ng-n1-n2 or ng1-ng2-n1-n2) or commonly applied to all antenna settings. For example, whether i is required... 1,3 The definition / setting of the report can also be applied when N1≥X or N2≥Y or N1≥N2 or N2=Y.

[0517] - Option 4: Is i needed? 1,3 The definition / setting of the report can also follow a combination of two or more of options 1 to 3.

[0518] Supports i for ranks 2, 3, and 4 1,3 In the case of i 1,3 Alternatively, you can follow at least one of the following selection branches.

[0519] - Select branch 1: Use for i 1,3 The existing tables mapping to k1 and k2.

[0520] - Choose branch 2: Define the i-type antenna for different antenna settings. 1,3 A new table mapping to k1 and k2. In this table, i 1,3 The value can remain in the range of 0 to 3, or it can be increased to 0 to 7.

[0521] Supports i for ranks 5, 6, 7, and 8. 1,3 In the case of i 1,3 Alternatively, you can follow at least one of the following selection branches.

[0522] - Select branch 1: Use for i 1,3 The existing tables mapping to k1 and k2.

[0523] - Choose branch 3: Define the i-type antenna for different antenna settings. 1,3 A new table mapping to k1 and k2. In this table, i 1,3 The value can remain in the range of 0 to 3, or it can be increased to 0 to 7.

[0524] Choosing branch 2 / 3 can also follow at least one of the following principles.

[0525] - The multiple candidate values ​​for k1 are {0, O1, 2 O1, 3 O1, ..., (N1-1)}. For O1}, the multiple candidate values ​​for k2 are {0, O2, 2O2, 3O2, ..., (N2-1)}. O2}.

[0526] - For an antenna setting where N2 = 1, k2 = 0.

[0527] - For antenna settings where N1 = N2, i 1,3 Consider using the same number of candidate combinations of k1 and k2.

[0528] - For antenna settings where N1 = N2, i 1,3 Consider using a combination of k1 and k2 with more candidates than k2.

[0529] Figure 25 Showing i for 64CSI-RS port 1,3 An example of a mapping to k1 and k2. In this example, i 1,3 The value ranges from 0 to 3. Figure 26 Showing i for 64CSI-RS port 1,3 Another example of mapping to k1 and k2. In this example, i 1,3 The value ranges from 0 to 7.

[0530] For a specific rank i 1,3 The report specifies that different layers have different beams, which can also be selected / reported by the UE.

[0531] For a specific rank i 1,3 Even if the report is not supported, it is still possible to select different beams for different layers.

[0532] For i in rank 5, 6, 7, 8 1,3 In cases where this is not supported, the codebook may also follow at least one of the following selection branches.

[0533] - Choose Branch 1: Regarding beam selection for different layers, reuse / reuse existing codebooks.

[0534] - Choose branch 2: Define a new codebook for beam selection for different layers.

[0535] For i with rank 2, 3, 4 1,3 In cases where this is not supported, the codebook can also follow the following selection branches.

[0536] - Choose branch 3: Define a new codebook for beam selection for different layers.

[0537] In selecting branch 2 / 3, the definition of beam selection offsets (e.g., k1, k2) for different layers can also follow at least one of the following options.

[0538] - Option 1: Beam selection offset can be defined either for a specific number of CSI-RS ports or publicly defined for all CSI-RS ports.

[0539] - Option 2: The beam selection offset can be defined for a specific antenna setting (n1-n2 or ng-n1-n2 or ng1-ng2-n1-n2) or it can be defined commonly for all antenna settings.

[0540] - Option 3: Beam selection offset can also follow a combination of options 1 and 2.

[0541] In the selection branch 1 for ranks 5, 6, 7, 8, the precoding matrix W can also be given by the following equations K3 to K6.

[0542]

[0543]

[0544]

[0545]

[0546] In the selection branch 3 for rank 2, 3, 4, the precoding matrix W can also be given by the following equations 7 to K10.

[0547]

[0548]

[0549]

[0550]

[0551] Here, l' and m' can be derived from l' = i 1,1 +O1 and m'=i 1,2 Given, it can also be given by l' = i 1,1 and m' = i 1,2 +O2 is given, and can also be obtained from l'=i 1,1 +O1 and m'=i 1,2 +O2 is given. In the first example of the rank 4 codebook, the same beam is selected / reported for layers 1 and 3, and the same beam is selected / reported for layers 2 and 4. In the second example of the rank 4 codebook, the same beam is selected / reported for layers 1 and 2, and the same beam is selected / reported for layers 3 and 4.

[0552] In selecting branch 2 / 3, the precoding matrix can also be modified to change layers with the same SD beams. In selecting branch 2, the precoding matrix can also be modified to change beams with the same SD beams. For example, in the aforementioned precoding matrix for rank 5 and codebookMode = 1-2, layers 1 and 2 select / report the same beams, layers 3 and 4 select / report the same beams, and layer 5 selects / reports other beams. In selecting branch 2, the precoding matrix can also be modified to change the relationship between the layer and the beams.

[0553] In selecting branch 2 / 3, the beam selection for other layers (beams different from layer 1) can also be changed by altering the formula l' / m' / l'' / m''.

[0554] <<Implementation Method C2-2>>

[0555] The codebook mode (whether codebook mode 1 or 2 is supported / applied, or whether a separate codebook design is supported / applied for codebook modes 1 and 2) can be defined in the specification or set by the RRC.

[0556] The codebook mode can also be applied by following at least one of the following options.

[0557] - Option 1: Codebook mode can be applied to a specific rank or to all ranks in general.

[0558] - Option 2: Codebook mode can be applied to a specific number of CSI-RS ports or to all CSI-RS ports in general.

[0559] - Option 3: Codebook mode can be applied to specific antenna settings (n1-n2 or ng-n1-n2 or ng1-ng2-n1-n2) or it can be applied to all antenna settings in a common way.

[0560] - Option 4: The codebook mode can also follow two or more combinations of options 1 to 3.

[0561] In the case of supporting codebook mode 2 for rank 1-2, codebook mode 2 can also follow at least one of the following selection branches.

[0562] - Choose branch 1: Reuse / repurpose existing codebook design.

[0563] - Choose branch 2: Support new codebook designs with different granularities accompanying i2. This granularity can include either larger or smaller granularities than the existing granularities.

[0564] In the case of supporting codebook mode 2 for rank 3-8, codebook mode 2 can also follow the following selection branch.

[0565] - Choose branch 3: Support the new codebook design.

[0566] In choosing branch 2 / 3, the codebook (especially i2) can also follow at least one of the following options.

[0567] - Option 1: The codebook can be defined either for a specific rank or publicly for all ranks.

[0568] - Option 2: The codebook can be defined either for a specific number of CSI-RS ports or publicly defined for all CSI-RS ports.

[0569] - Option 3: The codebook can be defined either for specific antenna settings (n1-n2 or ng-n1-n2 or ng1-ng2-n1-n2) or it can be defined publicly for all antenna settings.

[0570] - Option 4: The codebook may also follow two or more combinations of options 1 to 3.

[0571] Figure 27 This illustrates an example of a codebook for rank 1 and codebook mode 2 involved in selection branch 1. This codebook reuses / repurposes existing rank 1 codebook mode 2. For rank 1 using existing codebook mode 2, 4 bits are required for i2. Each subband contains a combination of four phase difference selections and four beam selections.

[0572] Figure 28 This illustrates an example of a codebook for rank 2 and codebook mode 2 involved in selection branch 1. This codebook reuses / repurposes existing codebook mode 2 for rank 2. For rank 1 using existing codebook mode 2, 3 bits are required for i2. Each subband contains a combination of two phase difference selections and four beam selections.

[0573] The codebook for rank 1 and codebook pattern 2 involved in selection branch 2 includes i2 with a smaller granularity than that in the codebook for rank 1 and codebook pattern 2 involved in selection branch 1. In this example, 3 bits are required for i2. The codebook can also follow at least one of the following selection branches.

[0574] - Select branch 2a: This codebook contains a combination of four phase difference selections and two beam selections per subband. In this example, eight values ​​of i2 from 0 to 8 can also be supported.

[0575] - Select branch 2b: This codebook contains a combination of two phase difference selections and four beam selections per subband. In this example, eight values ​​of i2 {0,1,4,5,8,9,12,13} can also be supported.

[0576] The codebook for rank 2 and codebook pattern 2 involved in selection branch 2 includes i2 with a smaller granularity than the existing codebook for rank 2 and codebook pattern 2 involved in selection branch 1. In this example, 2 bits are required for i2. This codebook can also follow the following selection branch.

[0577] - Select branch 2c: This codebook contains a combination of two phase difference selections and two beam selections per subband. In this example, the four values ​​of i2, 0-3, can also be supported.

[0578] Figure 29 An example of a codebook for rank 3 and codebook mode 2 is shown, involving selection branch 3. In this example, 3 bits are required for i2. The codebook can also follow at least one of the following selection branches.

[0579] - Select branch 3a: This codebook contains a combination of four phase difference selections and two beam selections per subband.

[0580] - Select branch 3b: This codebook contains a combination of two phase difference selections and four beam selections per subband.

[0581] - Select branch 3c: This codebook contains a combination of two phase difference selections and two beam selections per subband.

[0582] <<Implementation Method C2-3>>

[0583] Whether or not the codebook structure A / B in D3 is supported can be defined in the specification or set by the RRC.

[0584] The codebook structure can also be applied by following at least one of the following options.

[0585] - Option 1: The codebook structure can be applied to a specific rank or to all ranks in general.

[0586] - Option 2: The codebook structure can be applied to a specific number of CSI-RS ports or applied publicly to all CSI-RS ports.

[0587] - Option 3: The codebook structure can be applied to specific antenna settings (n1-n2 or ng-n1-n2 or ng1-ng2-n1-n2) or it can be applied to all antenna settings in a common way.

[0588] - Option 4: The codebook structure can also follow two or more combinations of options 1 to 3.

[0589] In cases where codebook structure B with rank 3,4 accompanied by a CSI-RS port number > 16 is supported, codebook structure B may also follow at least one of the following selection branches.

[0590] - Choose branch 1: Reuse / repurpose existing codebook design.

[0591] - Choose branch 2: Support accompanying θ p A new codebook design with different granularities. This granularity can include both larger and smaller granularities than the existing granularities.

[0592] In cases where codebook structure B is supported for at least one of other CSI-RS port numbers, other ranks, and other antenna settings, codebook structure B may also follow the following selection branches.

[0593] - Choose branch 3: Support the new codebook design.

[0594] In the case of supporting codebook structure B, the additional phase difference across multiple port groups can also be achieved through i 1,3 Alternatively, a new codebook index representation (report) may be used. Multiple port groups can be either two port groups corresponding to the first and second halves of all CSI-RS ports, or multiple port groups with finer granularity (e.g., four port groups). In existing specifications, the phase difference is added via i 1,3 It indicates that it applies only to ranks 3 and 4.

[0595] Option 1 can also reuse / repurpose the existing codebooks for rank 3 and 4 (with a CSI-RS port count > 16). The existing specification supports additional phase difference θ. p The four values ​​are {0, 1, 2, 3}. Here, θ p =e jπp / 4 In existing specifications, two port groups are considered for phase difference.

[0596] In branch 2 / 3, the phase difference between the two port groups can also be reported. For example, the phase difference between the latter half of the CSI-RS ports and the former half can also be reported. When using a codebook structure B that specifies at least one for a particular rank, a particular number of CSI-RS ports, and a particular antenna setting, the granularity of the added phase difference can be the same as or different from the existing granularity. For example, two values ​​{0,1} for the added phase difference can also be supported. Here, θ p =e jπp / 2For example, it can also support adding eight values ​​for the phase difference {0,1,2,3,4,5,6,7}. Here, θ p =e j πp / 8 In the aforementioned analysis of structure B in D3, the precoder v can be the same or different for different layers. For different layers, the phase difference... It can exist, it can not exist, and it can be - .

[0597] In branch 2 / 3, the phase difference between the four port groups can also be reported. Three parameters (θ1, θ2, θ3) can also be reported. These three parameters can be reported individually via the new codebook index, or they can be reported together. The three parameters can also correspond to the second, third, and fourth port groups. The three parameters can also be based on the first port group (or the phase difference relative to the first port group). The precoding matrix W in this case can also be given by the following equation K11.

[0598]

[0599] <<Implementation Method C2-4>>

[0600] For a given number of CSI-RS ports and a given rank, different antenna settings can support either the same codebook or different codebooks (e.g., the range of beam selection), which can be defined in the specification or configured by the RRC.

[0601] The codebook can also be applied by following at least one of the following options.

[0602] - Option 1: A specific codebook can be applied to a specific rank or to all ranks in general.

[0603] - Option 2: A specific codebook can be applied to a specific number of CSI-RS ports or applied publicly to all CSI-RS ports.

[0604] - Option 3: A specific codebook can be applied to a specific antenna setting (n1-n2 or ng-n1-n2 or ng1-ng2-n1-n2) or it can be applied to all antenna settings in a common way.

[0605] - Option 4: The codebook may also follow two or more combinations of options 1 to 3.

[0606] The difference in codebooks for different antenna settings can also follow at least one of the following selection branches.

[0607] - Select branch 1: i 1,2It can also be not reported, or it can be i 1,2 =0. This choice branch can also be applied to the case where N² = 1, and also to the case where N... g2 The cases where N = 1 and N2 = 1.

[0608] - Select branch 2a:i 1,1 It can also be selected / reported from all or a portion of the N1O1 beams. For example, i 1,1 It can be selected / reported from 0,1,...,N1O1-1, from 0,1,...,N1O1 / 2-1, and from 0,1,...,N1O1 / 4-1.

[0609] - Select branch 2b: i 1,2 It can also be selected / reported from all or part of the N2O2 beams. For example, i 1,2 It can be selected / reported from 0,1,...,N2O2-1, from 0,1,...,N2O2 / 2-1, or from 0,1,...,N2O2 / 4-1.

[0610] According to implementation C2, the UE is able to report the appropriate codebook for CSI-RS using more than 32 ports.

[0611] (Implementation Method I)

[0612] <Research>

[0613] It is being investigated that CSI-RS resources with more than 32 ports are not designed to be transmitted. Instead, it is being investigated that each CSI-RS resource uses a maximum of 32 CSI-RS ports, and multiple existing CSI-RS resources are used for measurements of more than 32 ports.

[0614] However, methods for mapping / associating existing CSI-RS resources to gNB antennas from antenna settings (N1, N2) have not been adequately investigated. Without sufficient research into this method, the execution of CSI calculations based on measurements from multiple CSI-RS resources leads to different UE behaviors. This association ensures that both the gNB and the UE have the same identification associated with the reported SD beam.

[0615] Consider the following mapping / correlation between three factors A, B, and C.

[0616] ◆Factor A: Port of CSI-RS resource.

[0617] ◆Factor B: The index of the port that enhances the number of ports is assigned.

[0618] ◆Factor C: Position in the new (N1, N2).

[0619] Implementation method A1 represents the relationship between factors A and B.

[0620] <Implementation Method I1>

[0621] Implementation method I1 involves the generation of 128 ports.

[0622] To generate port 128, it can also be configured to send four 32-port CSI-RS resources (existing CSI-RS resources). These four 32-port CSI-RS resources can also be TDMed in the same time slot or in multiple consecutive time slots.

[0623] For each port of the transmitted 32-port CSI-RS, the mapping / association of the gNB antenna within the antenna settings can also use the existing (N1, N2) settings for the 32 ports defined in the specification, or can be configured through a new (N... g1 N g2 The setting is indicated / set. This mapping / association can also be based on at least one of the following options.

[0624] ◆Option 1: Association from 32-port CSI-RS to multiple antennas, considering only the existing (N1,N2) for the 32-port. The existing (N1,N2) can also be any of (4,4), (8,2), or (16,1).

[0625] ◆Option 2: The association from the 32-port CSI-RS to multiple antennas is not limited to the existing (N1, N2) for the 32-port. Any rules defined in the specification may also be considered.

[0626] -◆For example, the association can either map port 32 first to the gNB antenna in the horizontal domain dimension and then to the gNB antenna in the vertical dimension, or it can map port 32 first to the gNB antenna in the vertical domain dimension and then to the gNB antenna in the horizontal dimension.

[0627] -◆For example, this association could also map port 32 first to the 1st, (1+d), ... gNB antenna in the horizontal dimension, and then to the 2nd, (2+d), ... gNB antenna in the vertical dimension.

[0628] -◆This association can also follow other rules to map the 32-port to multiple gNB antennas.

[0629] For each port of a CSI-RS and the existing antenna positions in (N1, N2), the existing rules can also be applied / transferred to various implementations for port mapping in each existing (N1, N2).

[0630] It can also support the following new (N1, N2) settings for port 128.

[0631] ◆ New (64,1) setting for 128-port

[0632] If this setting is supported, at least one rule from the following options can also be defined.

[0633] -◆Option 1-a: Each 32-port CSI-RS resource can also be defined to be associated with an existing (16,1) antenna in a specific order. Figure 30A In this example, four 32-port CSI-RS are mapped to four (16,1) antennas configured in the horizontal domain. Figure 30B As in the example, four 32-port CSI-RS can also be TDMed. The indexing of the ports of the 32-port CSI-RS in the existing (N1,N2) = (16,1) can also follow existing rules. The mapping of each CSI-RS port to the existing gNB antennas in (N1,N2) can also follow existing rules. The existing rules map the ports first to the antennas polarized by one, and then to the antennas polarized by the other. For example, ports 0 to 15 of the 32-port CSI-RS can be mapped to the horizontally polarized antennas in (16,1), and ports 16 to 31 can be mapped to the vertically polarized antennas in (16,1).

[0634] ◆ New (16,4) settings for 128-port

[0635] If this setting is supported, at least one rule from the following options can also be defined.

[0636] -◆Option 1-a: Each 32-port CSI-RS can also be defined to associate with an existing (4,4) antenna in a specific order. Figure 31A In this example, four 32-port CSI-RS are mapped to four (4,4) antennas. The four (4,4) antennas are configured in the horizontal domain.

[0637] -◆Option 1-b: Each 32-port CSI-RS can also be defined to associate with an existing (8,2) antenna in a specific order. Figure 31BIn this example, four 32-port CSI-RS are mapped to four (8,2) antennas. Two of the four (8,2) antennas are configured in the vertical domain, and then in the horizontal domain.

[0638] -◆Option 1-c: Each 32-port CSI-RS can also be defined to associate with an existing (16,1) antenna in a specific order. Figure 31C In this example, four 32-port CSI-RS are mapped to four (16,1) antennas. The four (16,1) antennas are configured in the vertical domain.

[0639] -◆Option 1-d: Supports association with at least one of (4,4), (8,2), and (16,1) of existing (N1,N2), and through a new (N g1 N g2 The 32 ports are indicated / configured using the existing (N1, N2). Figure 32 In the examples, the existing (N1,N2) of (4,4), (8,2), and (16,1) are respectively compared with the new (N) of (4,1), (2,2), and (1,4). g1 N g2 ( ) to be associated.

[0640] -◆Option 2-a: The rule is that each CSI-RS is associated with multiple antennas distributed across the horizontal domain. Figure 33 In the example, the first CSI-RS is associated with the (1, 5, 9, 13)th antenna in the horizontal domain and the 1st to 4th antennas in the vertical domain. The second CSI-RS is associated with the (2, 6, 10, 14)th antenna in the horizontal domain and the 1st to 4th antennas in the vertical domain. The third CSI-RS is associated with the (3, 7, 11, 15)th antenna in the horizontal domain and the 1st to 4th antennas in the vertical domain. The fourth CSI-RS is associated with the (4, 8, 12, 16)th antenna in the horizontal domain and the 1st to 4th antennas in the vertical domain. If i = 1, 2, 3, 4 and j = 1, 2, 3, 4, then 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.

[0641] -◆ Antenna configurations are not limited to the examples above. The number of antennas configured in the horizontal domain and the number of antennas configured in the vertical domain can also be interchanged.

[0642] -◆For different multiple associations, the measurement in the UE and the method of calculating the complete channel / CSI based on four measurements can also be different.

[0643] -◆The performance of each association method (rule) may differ when considering channel variations in four CSI-RS resources at different timings.

[0644] ◆ New (32,2) setting for 128-port

[0645] If this setting is supported, at least one rule from the following options can also be defined.

[0646] -◆Option 1-a: Each 32-port CSI-RS can also be defined to associate with an existing (8,2) antenna in a specific order.

[0647] -◆Option 1-b: Each 32-port CSI-RS can also be defined to associate with an existing (16,1) antenna in a specific order.

[0648] -◆Option 1-c: Supports association with at least one of (8,2) and (16,1) of existing (N1,N2), and through a new (N g1 N g2 The 32 ports are indicated / configured using the existing (N1, N2) ports.

[0649] -◆Option 2-a: The rule is not limited to the existing (N1,N2) of (8,2) and (16,1).

[0650] ◆ New (8,8) setting for 128-port

[0651] If this setting is supported, at least one rule from the following options can also be defined.

[0652] -◆Option 1-a: Each 32-port CSI-RS can also be defined to associate with an existing (4,4) antenna in a specific order.

[0653] -◆Option 1-b: Each 32-port CSI-RS can also be defined to associate with an existing (8,2) antenna in a specific order.

[0654] -◆Option 1-c: Each 32-port CSI-RS can also be defined to associate with an existing (16,1) antenna in a specific order.

[0655] -◆Option 1-d: Supports association with at least one of (4,4), (8,2), and (16,1) of existing (N1,N2), and through a new (N g1 N g2 The 32 ports are indicated / configured using the existing (N1, N2) ports.

[0656] -◆Option 2-a: The rule is not limited to the existing (N1,N2) of (4,4), (8,2) and (16,1).

[0657] Figure 34This example illustrates a candidate for considering the existing (N1, N2) ports in Option 1 with 32 ports. As previously mentioned, this example represents a CSI-RS antenna port count of 128, with new (N1, N2), existing (N1, N2), and new (N... g1 N g2 The associations in this example are only a portion of the multiple associations; some of them can be supported or set.

[0658] According to implementation method I1, multiple CSI-RS using 32 or fewer ports can be appropriately mapped / associated with multiple gNB antennas, and 128 CSI-RS ports can be appropriately utilized.

[0659] <Implementation Method I2>

[0660] Implementation method I2 involves the generation of port 96.

[0661] At least one of the following embodiments I2-1 and I2-2 can also be supported. At least one of the following embodiments I2-1 and I2-2 can also be configured.

[0662] <<Implementation Method I2-1>>

[0663] To generate port 96, it can also be configured to send three 32-port CSI-RS resources (existing CSI-RS resources). These three 32-port CSI-RS resources can also be TDMed in the same time slot or in multiple consecutive time slots.

[0664] For each port of the transmitted 32-port CSI-RS, the mapping / association of the gNB antenna within the antenna settings can also use the existing (N1, N2) settings for the 32 ports defined in the specification, or can be configured through a new (N... g1 N g2 The setting is indicated / set. This mapping / association can also be based on at least one of the following options.

[0665] ◆Option 1: Association from 32-port CSI-RS to multiple antennas, considering only the existing (N1,N2) for the 32-port. The existing (N1,N2) can also be any of (4,4), (8,2), or (16,1).

[0666] ◆Option 2: The association from the 32-port CSI-RS to multiple antennas is not limited to the existing (N1, N2) for the 32-port. Any rules defined in the specification may also be considered.

[0667] -◆For example, the association can either map port 32 first to the gNB antenna in the horizontal domain dimension and then to the gNB antenna in the vertical dimension, or it can map port 32 first to the gNB antenna in the vertical domain dimension and then to the gNB antenna in the horizontal dimension.

[0668] -◆For example, this association could also map port 32 first to the 1st, (1+d), ... gNB antenna in the horizontal dimension, and then to the 2nd, (2+d), ... gNB antenna in the vertical dimension.

[0669] -◆This association can also follow other rules to map the 32-port to multiple gNB antennas.

[0670] For each port of a CSI-RS and the existing antenna positions in (N1, N2), the existing rules can be either reused or applied to the implementation described later for port mapping in each existing (N1, N2).

[0671] Figure 35 This example illustrates a candidate for considering the existing (N1, N2) ports in Option 1 with 32 ports. This example represents a CSI-RS antenna port count of 96, with new (N1, N2), existing (N1, N2), and new (N... g1 N g2 The associations in this example are only a portion of the multiple associations; some of them can be supported or set.

[0672] In the new (N1,N2) = (12,4), the existing (N1,N2) = (4,4), the new (N g1 N g2 In the case of (3,1), as in this example, the three CSI-RS can also be associated with the (4,4) antennas configured in the horizontal domain.

[0673] <<Implementation Method I2-2>>

[0674] To generate port 96, it can also be configured to send four 24-port CSI-RS resources (existing CSI-RS resources). These four 24-port CSI-RS resources can also be TDMed in the same time slot or in multiple consecutive time slots.

[0675] For each port of the transmitted 24-port CSI-RS, the mapping / association of the gNB antennas within the antenna settings can also use the existing (N1, N2) settings for the 24 ports defined in the specification, or can be configured via a new (N... g1 N g2 The setting is indicated / set. This mapping / association can also be based on at least one of the following options.

[0676] ◆Option 1: Association from 24-port CSI-RS to multiple antennas, considering only the existing (N1,N2) for the 24-port. The existing (N1,N2) can also be any of (4,3), (6,2), or (12,1).

[0677] ◆Option 2: The association from the 24-port CSI-RS to multiple antennas is not limited to the existing (N1, N2) for the 24-port. Any rules defined in the specification may also be considered.

[0678] For example, the association can either map port 24 first to a gNB antenna in the horizontal domain dimension and then to a gNB antenna in the vertical dimension, or it can map port 24 first to a gNB antenna in the vertical domain dimension and then to a gNB antenna in the horizontal dimension.

[0679] -◆For example, this association could also map port 24 first to the 1st, (1+d), ... gNB antenna in the horizontal dimension, and then to the 2nd, (2+d), ... gNB antenna in the vertical dimension, or it could map port 24 first to the 1st, (1+d), ... gNB antenna in the vertical dimension, and then to the 2nd, (2+d), ... gNB antenna in the horizontal dimension.

[0680] -◆This association can also follow other rules to map the 24-port to multiple gNB antennas.

[0681] For each port of a CSI-RS and the existing antenna positions in (N1, N2), the existing rules can be either reused or applied to the implementation described later for port mapping in each existing (N1, N2).

[0682] Figure 36 This example illustrates a candidate for considering the existing (N1, N2) ports in Option 1 with 24 ports. This example represents a CSI-RS antenna port count of 96, with new (N1, N2), existing (N1, N2), and new (N... g1 N g2The associations in this example are only a portion of the multiple associations; some of them can be supported or set.

[0683] In the new (N1,N2) = (12,4), the existing (N1,N2) = (12,1), the new (N g1 N g2 In the case of (1,4), as in this example, the four CSI-RS can also be associated with the four (12,1) antennas configured in the horizontal domain.

[0684] In the new (N1,N2) = (12,4), the existing (N1,N2) = (6,2), the new (N g1 N g2 In the case of (2,2), as in this example, among the four CSI-RS, the first two CSI-RS are associated with the vertical domain, and then associated with the horizontal domain.

[0685] According to implementation method I2, multiple CSI-RS using 32 or fewer ports can be appropriately mapped / associated with multiple gNB antennas, and 96 CSI-RS ports can be appropriately utilized.

[0686] <Implementation Method I3>

[0687] Implementation method I3 involves the generation of a 72-port network.

[0688] To generate port 72, it can also be configured to send three 24-port CSI-RS resources (existing CSI-RS resources). These three 24-port CSI-RS resources can also be TDMed in the same time slot or in multiple consecutive time slots.

[0689] For each port of the transmitted 24-port CSI-RS, the mapping / association of the gNB antennas within the antenna settings can also use the existing (N1, N2) settings for the 24 ports defined in the specification, or can be configured via a new (N... g1 N g2 The setting is indicated / set. This mapping / association can also be based on at least one of the following options.

[0690] ◆Option 1: Association from 24-port CSI-RS to multiple antennas, considering only the existing (N1,N2) for the 24-port. The existing (N1,N2) can also be any of (4,3), (6,2), or (12,1).

[0691] ◆Option 2: The association from the 24-port CSI-RS to multiple antennas is not limited to the existing (N1, N2) for the 24-port. Any rules defined in the specification may also be considered.

[0692] For example, the association can either map port 24 first to a gNB antenna in the horizontal domain dimension and then to a gNB antenna in the vertical dimension, or it can map port 24 first to a gNB antenna in the vertical domain dimension and then to a gNB antenna in the horizontal dimension.

[0693] -◆For example, this association could also map port 24 first to the 1st, (1+d), ... gNB antenna in the horizontal dimension, and then to the 2nd, (2+d), ... gNB antenna in the vertical dimension, or it could map port 24 first to the 1st, (1+d), ... gNB antenna in the vertical dimension, and then to the 2nd, (2+d), ... gNB antenna in the horizontal dimension.

[0694] -◆This association can also follow other rules to map the 24-port to multiple gNB antennas.

[0695] For each port of a CSI-RS and the existing antenna positions in (N1, N2), the existing rules can be either reused or applied to the implementation described later for port mapping in each existing (N1, N2).

[0696] Figure 37 This example illustrates a candidate for considering the existing (N1, N2) ports in Option 1 with 24 ports. This example represents a CSI-RS antenna port count of 72, with new (N1, N2), existing (N1, N2), and new (N... g1 N g2 The associations in this example are only a portion of the multiple associations; some of them can be supported or set.

[0697] In the new (N1,N2) = (12,3), the existing (N1,N2) = (12,1), the new (N g1 N g2 In the case of (1,3), as in this example, the three CSI-RS can also be associated with the three (12,1) antennas configured in the vertical domain.

[0698] In the new (N1,N2) = (12,3), the existing (N1,N2) = (4,3), the new (N g1 N g2 In the case of (3,1), as in this example, the three CSI-RS can also be associated with the three (4,3) antennas configured in the horizontal domain.

[0699] For the new (N1,N2) = (9,4), it is also not possible to map to the existing (N1,N2) = (4,3), (6,2), (12,1) on port 24. For the new (N1,N2) = (9,4), at least one of the following selection branches can also be defined.

[0700] ◆Select branch a: For port 72, the new antenna setting (N1,N2) = (9,4) is not supported.

[0701] ◆ Select branch b: The association of the 24-port CSI-RS follows the other rules in option 2.

[0702] ◆Choose branch c: Consider a 12-port CSI-RS. That is, it can also be configured as six 12-port CSI-RS. These six 12-port CSI-RS resources can also be TDMed in the same time slot or in multiple consecutive time slots. Each CSI-RS resource can also use a new (N) g1 N g2 The antenna (N1,N2) is associated with the existing antenna (N1,N2) (3,2).

[0703] According to implementation method I3, multiple CSI-RS using 32 or fewer ports can be appropriately mapped / associated with multiple gNB antennas, and 72 CSI-RS ports can be appropriately utilized.

[0704] <Implementation Method I4>

[0705] Implementation method I4 involves the generation of 64 ports.

[0706] To generate port 64, it can also be configured to send two 32-port CSI-RS resources (existing CSI-RS resources). These two 32-port CSI-RS resources can also be TDMed in the same time slot or in multiple consecutive time slots.

[0707] For each port of the transmitted 32-port CSI-RS, the mapping / association of the gNB antenna within the antenna settings can also use the existing (N1, N2) settings for the 32 ports defined in the specification, or can be configured through a new (N... g1 N g2 The setting is indicated / set. This mapping / association can also be based on at least one of the following options.

[0708] ◆Option 1: Association from 32-port CSI-RS to multiple antennas, considering only the existing (N1,N2) for the 32-port. The existing (N1,N2) can also be any of (4,4), (8,2), or (16,1).

[0709] ◆Option 2: The association from the 32-port CSI-RS to multiple antennas is not limited to the existing (N1, N2) for the 32-port. Any rules defined in the specification may also be considered.

[0710] -◆For example, the association can either map port 32 first to the gNB antenna in the horizontal domain dimension and then to the gNB antenna in the vertical dimension, or it can map port 32 first to the gNB antenna in the vertical domain dimension and then to the gNB antenna in the horizontal dimension.

[0711] -◆For example, this association could also map port 32 first to the 1st, (1+d), ... gNB antenna in the horizontal dimension, and then to the 2nd, (2+d), ... gNB antenna in the vertical dimension.

[0712] -◆This association can also follow other rules to map the 32-port to multiple gNB antennas.

[0713] For each port of a CSI-RS and the existing antenna positions in (N1, N2), the existing rules can be either reused or applied to the implementation described later for port mapping in each existing (N1, N2).

[0714] Figure 38 This example illustrates a candidate for considering the existing (N1, N2) ports in Option 1 with 32 ports. This example represents a CSI-RS antenna port count of 64, with new (N1, N2), existing (N1, N2), and new (N... g1 N g2 The associations in this example are only a portion of the multiple associations; some of them can be supported or set.

[0715] In the new (N1,N2) = (8,4), the existing (N1,N2) = (8,2), the new (N g1 N g2 In the case of (1,2), as in this example, the two CSI-RS can also be associated with the two (8,2) antennas configured in the vertical domain respectively.

[0716] Given the new (N1,N2) = (8,4), the existing (N1,N2) = (4,4), and the new (N g1 N g2In the case of (2,1), as in this example, the two CSI-RS can also be associated with two (4,4) antennas configured in the horizontal domain.

[0717] According to implementation method I4, multiple CSI-RS using 32 or fewer ports can be appropriately mapped / associated with multiple gNB antennas, and 64 CSI-RS ports can be appropriately utilized.

[0718] <Implementation Method I5>

[0719] Implementation method I5 involves the generation of 48 ports.

[0720] To generate port 48, it can also be configured to send two 24-port CSI-RS resources (existing CSI-RS resources). These two 24-port CSI-RS resources can also be TDMed in the same time slot or in multiple consecutive time slots.

[0721] For each port of the transmitted 24-port CSI-RS, the mapping / association of the gNB antennas within the antenna settings can also use the existing (N1, N2) settings for the 24 ports defined in the specification, or can be configured via a new (N... g1 N g2 The setting is indicated / set. This mapping / association can also be based on at least one of the following options.

[0722] ◆Option 1: Association from 24-port CSI-RS to multiple antennas, considering only the existing (N1,N2) for the 24-port. The existing (N1,N2) can also be any of (4,3), (6,2), or (12,1).

[0723] ◆Option 2: The association from the 24-port CSI-RS to multiple antennas is not limited to the existing (N1, N2) for the 24-port. Any rules defined in the specification may also be considered.

[0724] For example, the association can either map port 24 first to a gNB antenna in the horizontal domain dimension and then to a gNB antenna in the vertical dimension, or it can map port 24 first to a gNB antenna in the vertical domain dimension and then to a gNB antenna in the horizontal dimension.

[0725] -◆For example, this association could also map port 24 first to the 1st, (1+d), ... gNB antenna in the horizontal dimension, and then to the 2nd, (2+d), ... gNB antenna in the vertical dimension, or it could map port 24 first to the 1st, (1+d), ... gNB antenna in the vertical dimension, and then to the 2nd, (2+d), ... gNB antenna in the horizontal dimension.

[0726] -◆This association can also follow other rules to map the 24-port to multiple gNB antennas.

[0727] For each port of a CSI-RS and the existing antenna positions in (N1, N2), the existing rules can be either reused or applied to the implementation described later for port mapping in each existing (N1, N2).

[0728] Figure 39 This example illustrates a candidate for considering the existing (N1, N2) ports in Option 1 with 24 ports. This example represents a CSI-RS antenna port count of 48, with new (N1, N2), existing (N1, N2), and new (N... g1 N g2 The associations in this example are only a portion of the multiple associations; some of them can be supported or set.

[0729] According to implementation method I5, multiple CSI-RS using 32 or fewer ports can be appropriately mapped / associated with multiple gNB antennas, and 48 CSI-RS ports can be appropriately utilized.

[0730] <Variation 1 of Implementation Method I>

[0731] For an enhanced port count exceeding 32, multiple CSI-RS resources with a smaller number of existing ports than those in Embodiments I1 to I4 can also be configured. The enhanced port count may, for example, include at least one of 48, 64, 72, 96, and 128. The existing port count may, for example, include at least one of 12 and 16. The association of gNB antennas using CSI-RS resources with the existing port count can also consider existing (N1, N2) settings for the existing port count.

[0732] When using more CSI-RS resources (using the existing number of ports per CSI-RS resource), transmission needs to be performed over a longer period. This is due to the varying channel frequency during that time, making measurements less accurate. Furthermore, UE measurements become more complex.

[0733] <Variation 2 of Implementation Method I>

[0734] Regarding the aforementioned factors A, B, and C, Implementation A1 represents the relationship between factors A and B, while Implementations I1 to I5 represent the relationship between factors A and C.

[0735] <<Change 2A>>

[0736] The association between factors A and C can also be defined / set. This association can also be combined with the association between factors A and B in implementation method A1. The association between factors A and C can also be based on at least one of the following options.

[0737] ◆Option 1: At each position in the new (N1, N2), the ports can also be indexed first to the horizontal domain, then to the vertical domain, and finally to the polarization domain. The order of the horizontal, vertical, and polarization domains during indexing can also be different. The ports can also be 0 to X-1, or 1 to X. For example, X could be X = 128 / 96 / 72 / 64 / 48.

[0738] ◆Option 2: New (N1, N2) can also be set at each position in the new (N1, N2). g1 N g2 ) and the existing (N1, N2). It can also be done through the new (N) g1 N g2 N was provided g1 ×N g2 The ports can be assigned to the horizontal domain first, then the vertical domain, then the polarization domain, and finally the group domain. The order of the horizontal, vertical, polarization, and group domains during index assignment can also be different. Ports can also be 0 to 127, or 1 to 128.

[0739] <<Change 2B>>

[0740] The association between factors A and C, and the association between factors B and C, can also be defined / set. Alternatively, the association between factors A, B, and C can be constructed without using the association between factors A and B in implementation method A1. The final result may not be that the first CSI-RS resource is mapped to port indices 0 to 31. Therefore, other associations between factors A and B can also be derived.

[0741] <<Change 2C>>

[0742] You can also define / set the relationships between factors A, B, and C.

[0743] <Variation 3 of Implementation Method I>

[0744] Implementation method I can also use new (N1, N2) to apply enhancements based on type 1 / type 2 / enhanced type 2 / additional enhancement type 2. In enhancements based on Rel.15 type 1 multi-panel CSI, the defined / set mappings / associations can also be based on at least one of the following options.

[0745] ◆Option 1: Define / set the association between factors A and B, and the association between factors A and C. For example, each CSI-RS resource can correspond to one panel or multiple panels. Alternatively, it can be indexed by consecutive ports within each panel.

[0746] ◆Option 2: Define / set the association between factors A and B, and the association between factors A and C.

[0747] ◆Option 3: Define / set the relationship between factors A and C, and the relationship between factors B and C.

[0748] ◆Option 4: Define / set the associations between factors A, B, and C. Tables for the associations between factors A, B, and C can also be defined, along with new association indicators to indicate / set these associations. For example, association indicator = 1 can be associated with the four antenna groups #1 to #4 of the (16,1) antenna. Each group can also be associated with CSI-RS resources. Antenna group #1 can also be associated with port indices 0 to 31, antenna group #2 with port indices 32 to 63, antenna group #3 with port indices 64 to 95, and antenna group #4 with port indices 96 to 127.

[0749] Figure 40 This example illustrates a candidate for a 32-port association for a multi-panel architecture. In this example, the multi-panel architecture is based on a new (N) port. g1 N g2 The example shows two panels with 64 CSI-RS antenna ports: new (N1, N2), existing (N1, N2), and new (N... g1 N g2 The associations in this example are only a portion of the multiple associations; some of them can be supported or set.

[0750] In the new (N1,N2) = (8,4), the existing (N1,N2) = (8,2), the new (N g1 N g2 In the case of (1,2), as in this example, the two CSI-RS can also be associated with the two (8,2) antennas configured in the vertical domain respectively.

[0751] In the new (N1,N2) = (8,4), the existing (N1,N2) = (4,4), the new (N g1 N g2 In the case of (2,1), as in this example, the two CSI-RS can also be associated with the two (4,4) antennas configured in the horizontal domain respectively.

[0752] It can also be like Figure 41 As in the example, two CSI-RS resources can be TDMed, or the first CSI-RS can use ports 0 to 31, and the second CSI-RS can use ports 32 to 63.

[0753] (Implementation Method J)

[0754] <Research>

[0755] In implementation method B, SD beam selection, and based on i 1,1 i 1,2 (For several ranks, also based on i) 1,3 The report defines new (N1, N2) for enhanced port numbers exceeding 32. Enhanced port numbers can also be, for example, 48 / 64 / 72 / 96 / 128.

[0756] In implementation B, for larger N1O1 and N2O2, it is necessary to consider the i values ​​for each rank. 1,1 i 1,2 The feedback range and feedback bits are enhanced. For example, it can be i 1,1 =0,1,...,N1O1-1 or 0,1,...,N1O1 / 2-1, or i 1,2 =0,1,...,N2O2-1 or 0,1,...,N2O2 / 2-1.

[0757] For example, in implementation B, for a 128-port, new (N1,N2) = (16,4), existing (N1,N2) = (8,2), new (N g1 N g2 In the case where (O1,O2) = (2,2), if we assume (O1,O2) = (4,4), then... Figure 42 As in the example, the UE can also select an SD beam from N1O1×N2O2=(16×4)×(4×4)=64×16 SD beams based on the new (N1,N2), and through (i 1,1 i 1,2 )=(12,1)to report the selected SD beam.

[0758] However, if we consider the existing (N1,N2) settings for enhancing the number of ports based on the existing (N1,N2) settings for the existing number of ports, then we should consider other methods for reporting the selected SD beam.

[0759] <Implementation Method J1>

[0760] In the SD beam report for a specific new (N1, N2) setting, for each rank i 1,1 i 1,2 The feedback range and feedback bits are based on existing (N1, N2) values ​​that are set and associated to represent SD beams from multiple ports of the associated existing port CSI-RS resource. To represent the CSI-RS resource (port group) selected for that SD beam, i can also be introduced. 1,4 Additional feedback content.

[0761] In this disclosure, i 1,4 It can also be represented using other indexes. This index can also be i. x i x,y i x,y,z Any one of them. x, y, z can also be any integer.

[0762] You can also define at least one of the following options.

[0763] ◆Option 1: i 1,4 It is an index. Its bit size can also be ceil(log2(N)). g1 N g2 )).

[0764] ◆Option 2: i 1,4 There are two indexes (i) 1,4,1 i 1,4,2 Its bit size can also be ceil(log2(N)). g1 )) and ceil(log2(N g2 In N) g1 =1 or N g2 When i = 1, the corresponding feedback i 1,4,1 or i 1,4,2 The bit can also be omitted.

[0765] exist Figure 43 In the example used for port 128, new (N1,N2) = (16,4), existing (N1,N2) = (8,2), new (N g1 N g2 In the case where (O1, O2) = (2, 2), imagine (O1, O2) = (4, 4). In this example, (i 1,1 i 1,2) = (12,1) represents (for a certain layer,) the SD beam selected from the existing N1N2O1O2 SD beams (N1O1×N2O2=32×8 SD beams) based on (N1,N2). In option 2, (i 1,4,1 i 1,4,2 ) = (0,0) means starting from N g1 ×N g2 = The CSI-RS resource selected from 2×2 CSI-RS resources. One CSI-RS resource corresponds to N1N2O1O2 SD beams based on the existing (N1,N2). The association between CSI-RS resources, CSI-RS port index, and new (N1,N2) antenna positions can also be based on Implementation I. In this example, the four CSI-RS resources correspond to four groups of N1N2O1O2 antennas based on the existing (N1,N2). In this example, the UE selects the SD beam from the third CSI-RS resource.

[0766] Regarding the SD beam targeting the first layer via the aforementioned i 1,1 i 1,2 i 1,4 When instructed, via i 1,3 SD beams selected from multiple different layers (or determined by rules in the specification), for those selected according to i 1,1 +k1, or i 1,2 +k2, or i 1,1 +O1, or i 1,2 The additional SD beam determined by +O2 (for more than one other layer), i 1,1 i 1,2 It is identified as at least one of the following options.

[0767] ◆Option A: From the N1N2O1O2 SD beams based on the new (N1,N2), i 1,1 i 1,2 Instructions.

[0768] -◆In Figure 44 In the example used for port 128, new (N1,N2) = (16,4), existing (N1,N2) = (8,2), new (N g1 N g2 In the case where (O1, O2) = (2, 2), we envision (O1, O2) = (4, 4). In this example, the initial layer's SD beam is based on implementation B, represented by (i) of the SD beams from the new (N1, N2) N1N2O1O2 SD beams. 1,1 i 1,2(12,1) is represented. In this example, the SD beams of other layers are represented by (i) of the SD beams from the N1N2O1O2 SD beams based on the new (N1,N2). 1,1 i 1,2 +2O2)=(12,1+8) is represented. In this example, the SD beam (i) from the initial layer 1,1 i 1,2 The offset of the SD beams to other layers can also be represented by (0,2O2) = (0,8) in the N1N2O1O2 SD beams (N1O1×N2O2 two-dimensional SD beams) based on the new (N1,N2).

[0769] ◆Option B: From the existing (N1,N2) N1N2O1O2 SD beams, i 1,1 i 1,2 The instructions. The additional, determined SD beam is limited to the area controlled by i 1,4,1 i 1,4,2 The indicated CSI-RS resource or port group. Multiple SD beams for all layers can also be selected from a single CSI-RS resource (based on the existing (N1,N2) N1N2O1O2 SD beams).

[0770] -◆In Figure 45 In the example used for port 128, 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 CSI-RS resources and the groups of N1N2O1O2 antennas based on the existing (N1, N2) can also be based on implementation method I. In this example, the four CSI-RS resources correspond to the four groups of N1N2O1O2 antennas based on the existing (N1, N2) respectively. In this example, the UE selects the SD beam in the third CSI-RS resource. The selected CSI-RS resource, or the selected group of N1N2O1O2 antennas based on the existing (N1, N2) is connected via (i 1,4,1 i 1,4,2 (0,0) is represented. In this example, the initial layer's SD beam is represented by (i) the SD beam from the group of N1N2O1O2 SD beams corresponding to the 3rd CSI-RS resource, based on the existing (N1,N2) SD beams. 1,1 i 1,2 (12,1) is represented. In this example, the SD beams of other layers are represented by (i) the SD beams of the existing (N1,N2) N1N2O1O2 SD beams from the same 3rd CSI-RS resource.1,1 i 1,2 +2O2)=(12,1) is represented. In this example, the SD beam (i) from the initial layer 1,1 i 1,2 The offset of the SD beam to other layers is represented by (0, 2O2) in (N1O1 × N2O2 two-dimensional SD beams). In this example, the position (i) beyond the range of the existing (N1, N2) two-dimensional SD beam of N1O1 × N2O2 is considered. 1,1 i 1,2 +2O2) = (i 1,1 mod N1O1, (i 1,2 +2O2) mod N2O2) = (12 mod 64, 1+8 mod 8) = (12,1).

[0771] ◆Option C: From the new (N1,N2) N1N2O1O2 SD beams, i 1,1 i 1,2 The instructions. Additional, determined SD beams can also be added beyond those via i 1,4,1 i 1,4,2 The indicated CSI-RS resource or port group. Option C can also be calculated based on at least one of the following options Cx.

[0772] -◆Option C1: This calculation is based on the positions of multiple gNB antennas in the new (N1,N2) array. The final result is the same as in Option A.

[0773] --◆In Figure 46 In the example used for port 128, new (N1,N2) = (16,4), existing (N1,N2) = (8,2), new (N g1 N g2 In the case where (O1, O2) = (2, 2), we envision (O1, O2) = (4, 4). The association between CSI-RS resources and the groups of N1N2O1O2 antennas based on the existing (N1, N2) can also be based on implementation method I. In this example, the four CSI-RS resources correspond to the four groups of N1N2O1O2 antennas based on the existing (N1, N2) respectively. The CSI-RS resources selected for the initial layer and the CSI-RS resources selected for other layers can also be different. In this example, the UE selects the SD beam in the third CSI-RS resource for the initial layer. The selected CSI-RS resources, or the selected groups of N1N2O1O2 antennas based on the existing (N1, N2) are connected via (i 1,4,1 i 1,4,2(0,0) is represented. In this example, the initial layer's SD beam is represented by the group of N1N2O1O2 SD beams corresponding to the 3rd CSI-RS resource, based on the existing (N1,N2) SD beams (i 1,1 i 1,2 (12,1) is represented. In this example, the SD beams of other layers are represented by (i) the SD beams from the first CSI-RS resource, based on the existing (N1,N2) N1N2O1O2 SD beams. 1,1 i 1,2 +2O2)=(12,1+8) is represented. In this example, the SD beam (i) from the initial layer 1,1 i 1,2 The offset of the SD beams to other layers is represented by (0,2O2) = (0,8) in the N1N2O1O2 SD beams (N1O1×N2O2 two-dimensional SD beams) based on the new (N1,N2).

[0774] -◆Option C2: This calculation is based on the order of CSI-RS resources.

[0775] --◆ Figure 47 In the example used for port 128, new (N1,N2) = (16,4), existing (N1,N2) = (8,2), new (N g1 N g2 In the case where (O1, O2) = (2, 2), we envision (O1, O2) = (4, 4). The association between CSI-RS resources and the groups of N1N2O1O2 antennas based on the existing (N1, N2) can also be based on implementation method I. In this example, the four CSI-RS resources correspond to the four groups of N1N2O1O2 antennas based on the existing (N1, N2) respectively. The CSI-RS resources selected for the initial layer and the CSI-RS resources selected for other layers can also be different. In this example, the UE selects the SD beam in the third CSI-RS resource for the initial layer. The selected CSI-RS resources, or the selected groups of N1N2O1O2 antennas based on the existing (N1, N2) are connected via (i 1,4,1 i 1,4,2 (0,0) is represented. In this example, the initial layer's SD beam is represented by the group of N1N2O1O2 SD beams corresponding to the 3rd CSI-RS resource, based on the existing (N1,N2) SD beams (i 1,1 i 1,2 (12,1) is represented. In this example, the SD beams of other layers are represented by (i) the SD beams from the first CSI-RS resource, based on the existing (N1,N2) N1N2O1O2 SD beams.1,1 i 1,2 +2O2)=(12,1) is represented. In this example, the SD beam (i) from the initial layer 1,1 i 1,2 The offset of the SD beam to other layers is represented by (0, 2O2) in the existing (N1, N2) N1N2O1O2 SD beams (N1O1×N2O2 two-dimensional SD beams). In this example, the position (i) outside the range of the existing (N1, N2) N1O1×N2O2 two-dimensional SD beams is represented by (i). 1,1 i 1,2 +2O2) becomes the (i) two-dimensional SD beam range of N1O1×N2O2 corresponding to the adjacent CSI-RS resource. 1,1 mod N1O1, (i 1,2 +2O2) mod N2O2) = (12 mod 64, 1+8 mod8) = (12,1).

[0776] -◆Option C3: This calculation is based on the order in which the indices of the enhanced port count are assigned. In this option, the final result can also be determined by the association between the enhanced port count and the base station antenna location in Implementation I.

[0777] <Supplement to Implementation Method J>

[0778] The SD beam reporting method enhanced by implementation method J can also be applied to enhancements based on (Rel.15) type 1 single-panel CSI and enhancements based on (Rel.15) type 1 multi-panel CSI.

[0779] Various SD beam reporting methods (e.g., SD beam reporting methods including at least one of implementations B and J) can also be configured by the NW according to the UE capabilities.

[0780] Various SD beam reporting methods (e.g., SD beam reporting methods including at least one of Embodiment B and Embodiment J) can also be applied to different scenarios. For example, the SD beam reporting method of Embodiment B can also be applied to enhancement based on (Rel. 15) Type 1 single-panel CSI, and the SD beam reporting method of Embodiment J can also be applied to enhancement based on (Rel. 15) Type 1 multi-panel CSI. It can also be indicated that i was selected. 1,4 The panel.

[0781] (Implementation Method K)

[0782] <Research>

[0783] In implementation C1, when different antenna settings (n1-n2 or ng-n1-n2 or ng1-ng2-n1-n2) are used for more than 32 ports in implementation B, and a type 1 single-panel codebook is supported / set, the codebook design can also be the same as Rel.15 type 1 CSI. Existing codebook designs for existing CSI-RS can also be enhanced by i 1,1 i 1,2 i2 or i 1,1 i 1,2 i 1,3 The range of feedback values ​​for i2 and the number of bits in the feedback values ​​extend the Type 1 single-panel codebook to more than 32 ports. For larger N1O1 and N2O2 (new N1, N2 / new O1O2 / existing O1O2), consider enhancing i for each rank. 1,1 i 1,2 The range of feedback values ​​and the number of bits in the feedback values.

[0784] Regarding i 1,1 i 1,2 The SD base of one or more layers with different layers can also be based on an existing Type 1 codebook, through i 1,3 Reporting can be done, or it can be defined in the specification. The design of a Type 1 codebook for SD substrates targeting more than one different layer is more complex than the structure of a Type 2 codebook where multiple layers share a common SD substrate and are directly reported. It is preferable to study SD beam reporting for more than one different layer for more than 32 ports.

[0785] In implementation J, in the SD beam report for a specific new (N1, N2) setting, for each rank i 1,1 i 1,2 The feedback range and feedback bits are based on the existing (N1, N2) values ​​that are set and associated to represent the SD beams from multiple ports of the associated existing port CSI-RS resource. To represent the CSI-RS resource (port group) selected for that SD beam, i can also be introduced. 1,4 Additional feedback content.

[0786] <Implementation Method K1>

[0787] Regarding the reporting of SD beams for multiple layers for a specific new (N1, N2) setting for more than 32 ports, implementation K1 relates to SD beam selection for a polarization (e.g., one of horizontal and vertical polarization).

[0788] For i 1,1 i 1,2 Alternatively, at least one of the following reporting methods may be used.

[0789] ◆Method 1: This method is based on a Type 1 codebook.

[0790] i 1,1 = {0, 1, ..., N1O1-1}. 1,1 Its size is log2(N1O1) bits.

[0791] i 1,2 = {0, 1, ..., N₂O₂⁻¹}. 1,2 Its size is log2(N2O2) bits.

[0792] N1 and N2 can also refer to new (N1, N2) for more than 32 ports.

[0793] ◆Method 2: This method is based on Type 2 codebook.

[0794] i 1,1 =[q1 q2]、 q1 = {0, 1, ..., O1-1} q2 = {0, 1, ..., O2-1}. 1,1 Its size is log2(O1O2) bits.

[0795] i 1,2 = {0, 1, ..., N1N2-1}. 1,2 Its size is log2(N1N2) bits.

[0796] N1 and N2 can also refer to new (N1, N2) for more than 32 ports.

[0797] ◆Method 3: This method is based on implementation method J.

[0798] i 1,1 i 1,2 This indicates the SD beam originating from the existing N1N2O1O2. 1,4 It can also be based on at least one of the following options.

[0799] -◆Option 1: i 1,4 It is an index. Its size is ceil(log2(N)). g1 N g2 Bit.

[0800] -◆Option 2: i 1,4 There are two indexes (i) 1,4,1 i 1,4,2 Their sizes are ceil(log2(N)). g1 )) bits and ceil(log2(N g2Bit.

[0801] N1 and N2 can also refer to new (N1, N2) for more than 32 ports.

[0802] SD beam reporting for multiple layers can also be based on at least one of the following selectable branches.

[0803] ◆Select Branch 1: For a single SD beam shared by multiple layers, via i 1,1 i 1,2 Reported. Reporting is also possible for all layers (i 1,1 i 1,2 A set of ).

[0804] ◆Choose branch 2: For each layer, report independent / separate SD beams. In the case of rank v, it is also possible to report (i... 1,1 i 1,2 v sets.

[0805] ◆Select branch 3: Report independent / separate SD beams per codeword (CW). Reporting is also possible when rank v is below 4 (i... 1,1 i 1,2 A set of (i) whose rank v is greater than 4 can also report (i) 1,1 i 1,2 Two sets.

[0806] ◆Select Branch 4: Report independent / separate SD beams every 2 layers. For example, the SD beams reported every 2 layers could be the same SD beam for layers 1 and 2, and the same SD beam for layers 3 and 4, etc. In cases where rank v is below 2, (i...) can also be reported. 1,1 i 1,2 A set of (i) whose rank v is greater than 2 and less than 4 can also report (i) 1,1 i 1,2 Two sets of (i) can also be reported if their rank v is greater than 4 and less than 6. 1,1 i 1,2 The three sets of (i) can also be reported if the rank v is greater than 6 and less than 8. 1,1 i 1,2 The four sets of ( ). Which layers share the same SD beam can also be defined in the formula for the precoding matrix W used in the codebook for canonicalization. According to this selection branch, a balance between overhead and flexibility can be achieved.

[0807] ◆Selection Branch 5: In any of the selection branches 1 to 4, the following additional constraint can also be applied: the SD beams for more than one layer other than the first layer are selected within the same SD beam group (orthogonal SD beam group, group) as the first layer. The SD beam group can also be selected via i 1,1 = [q1 q2] represents N1N2 SD beams. An SD beam within an SD beam group can also be accessed via i 1,2 = {0, 1, ..., N1N2-1} is represented. In Figure 48 In the example, an SD beam group from the new N1N2O1O2 SD beams can also be achieved through i 1,1 = [1 1] represents the N1N2 SD beams. This branch selection can also be based on at least one of the following examples.

[0808] -◆Example 1: When applying method 2, the aforementioned selection branches 2 to 4 can also be rewritten as selection branches 2a to 4a below.

[0809] --◆Select Branch 2a: From within the same SD beamgroup, report independent / separate SD beams by layer. In the case of rank v, you can also report the indication of the SD beamgroup using i. 1,1 The VIs used for beam indication within the group 1,2 .exist Figure 49 In the example, rank v = 4, the report represents an i in an SD beamgroup. 1,1 , and represent the v=4 i values ​​of the v=4 SD beams within this SD beam group, respectively. 1,2 .

[0810] --◆Select branch 3a: From within the same SD beam group, report independent / separate SD beams per CW. Reporting is also possible when rank v is below 4 (i 1,1 i 1,2 A set of ) can also report an i if its rank v is greater than 4. 1,1 and two i 1,2 .

[0811] --◆Select Branch 4a: From the same SD beamgroup, report independent / separate SD beams, in every 2 layers. For example, the SD beams reported in every 2 layers could be the same SD beams for layers 1 and 2, and the same SD beams for layers 3 and 4, etc. An indicator of the SD beamgroup can also be reported. 1,1 Even when the rank v is less than 2, an i can still be reported. 1,2 When the rank v is greater than 2 and less than 4, two i can also be reported. 1,2Even when the rank v is greater than 4 and less than 6, three i can still be reported. 1,2 When the rank v is greater than 6 and less than 8, four i can also be reported. 1,2 .

[0812] -◆Example 2: When applying method 1, the aforementioned selection branches 2 to 4 can also be rewritten as selection branches 2b to 4b below.

[0813] --◆Select branch 2b: From within the same SD beamgroup, report independent / separate SD beams for each layer. In the case of rank v, it is also possible to report for layer 1 (i 1,1 i 1,2 A set of () and v-1 i for other layers new For i in all layers other than layer 1 new It can also represent an SD beam within the same SD beam group as the SD beam of layer 1. new The size can also be log2(N1N2) bits.

[0814] --◆Select branch 3b: From within the same SD beam group, report independent / separate SD beams per CW. Reporting is also possible when rank v is below 4 (i 1,1 i 1,2 A set of (i) whose rank v is greater than 4 can also report (i) for the first CW. 1,1 i 1,2 A set of ) and an i for the second CW new i new It can also refer to the SD beam within the same SD beam group as the SD beam for the first CW. new The size can also be log2(N1N2) bits.

[0815] --◆Select Branch 4b: From the same SD beamgroup, report independent / separate SD beams, in every 2 layers. For example, the SD beams reported in every 2 layers could be the same SD beams for layers 1 and 2, and the same SD beams for layers 3 and 4, etc. An indicator of the SD beamgroup can also be reported. 1,1 For Layer 1 and Layer 2, reports can also be made (i 1,1 i 1,2 A set of ), where the rank v is greater than 2 and less than 4, can also report an i for more than one layer other than layer 1 and layer 2. new When the rank v is greater than 4 and less than 6, it is also possible to report two i for multiple layers other than layer 1 and layer 2. newWhen the rank v is greater than 6 and less than 8, it is also possible to report three i for multiple layers other than layer 1 and layer 2. new i new For the two layers other than Layer 1 and Layer 2, it can also represent the SD beams within the same SD beam group as the SD beams for Layer 1 and Layer 2. new The size can also be log2(N1N2) bits.

[0816] -◆Change 1: The constraint "within the same SD beamgroup" can be applied either per CW or per 2 layers. i reported using Method 2 1,1 The quantity, or the number of i reported using method 1 new The number can also differ from the example of selecting branch 5. In the case of X SD beam groups, i can also be reported. 1,1 X sets.

[0817] -◆Change 2: The constraint that SD beams of which layer are “within the same SD beam group” can also be defined in the formula of the precoding matrix W used for the codebook of the canonical.

[0818] According to implementation K1, for a specific new (N1, N2) setting for more than 32 ports, the UE can appropriately report SD beams for multiple layers.

[0819] <Implementation Method K2>

[0820] Implementation K2 relates to the relationship between the SD beams of the two polarizations.

[0821] In the case of SD beam selection for multiple layers of a polarization (a first polarization, for example, one of horizontal polarization and vertical polarization) based on implementation method K1, SD beam selection for other polarizations (a second polarization, for example, the other of horizontal polarization and vertical polarization) can also be based on at least one of the following selection branches.

[0822] ◆Select Branch 1: Do not use inter-polarization co-phasing, select / report the same SD beam for the second polarization as for the first polarization.

[0823] ◆Select Branch 2: Use the inter-polarization phase adjustment common to all layers. For the second polarization, select / report the same SD beam as the first polarization. Report an inter-polarization phase adjustment.

[0824] ◆Select Branch 3: Use layer-specific inter-polarization phase adjustments, selecting / reporting the same SD beam for the second polarization as for the first polarization. In the case of rank v, report v inter-polarization phase adjustments.

[0825] ◆Select Branch 4: Use CW-specific inter-polarization phase adjustments, selecting / reporting the same SD beam for the second polarization as for the first polarization. Report one inter-polarization phase adjustment if rank v is below 4. Report two inter-polarization phase adjustments if rank v is above 4.

[0826] ◆Select Branch 5: Use the phase adjustment between every 2 common polarizations, and select / report the same SD beam for the second polarization as for the first polarization.

[0827] ◆Select Branch 6: For the second polarization, (based on implementation K1) select / report independent / separate SD beams.

[0828] ◆ Variation: Which multiple layers have the same phase adjustment between polarizations can also be defined in the formula for the precoding matrix W used in the codebook for canonicalization.

[0829] The precoding matrix W based on the type 1 codebook structure can also be given by the following equation L1.

[0830]

[0831] v can also be rank. j can also be level. i 1,1,j and i 1,2,j It can also refer to the SD beam of layer j. n,j It can also refer to the phase adjustment between polarizations of layer j.

[0832] In implementation method K1 / implementation method K2, when different selection branches are applied, v_i 1,1,j i 1,2,j as well as n,j It can be the same for multiple different layers, or different for different layers j, or different for different layers j, as reported by the UE, or different for different layers j, and is defined in the formula of the precoding matrix W used for the codebook of the specification.

[0833] According to implementation K2, for a specific new (N1, N2) setting for more than 32 ports, the UE can appropriately report SD beams for multiple polarizations and multiple layers.

[0834] <Supplement>

[0835] <<Information Notification to UE>>

[0836] In the above embodiments, any information [notification from the network (NW) (e.g., base station (BS))] to the UE (in other words, the reception of any information from the BS in the UE) can also be delivered using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PDCCH, PDSCH, reference signals), or combinations thereof.

[0837] In the case where the above notification is made via MAC CE, the MAC CE can also be identified by including a new Logical Channel ID (LCID) that is not specified in the existing standard in the MAC subheader.

[0838] When the above notification is made through a DCI, the notification can also be made through specific fields of the DCI, the Radio Network Temporary Identifier (RNTI) used in the scrambling of the Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0839] Furthermore, the notification of any information to the UE in the above embodiments can also be carried out periodically, semi-persistently, or non-periodically.

[0840] <<Notification of Information from UE>>

[0841] The notification of arbitrary information from the UE to the NW (in other words, the transmission / reporting of arbitrary information from the UE to the BS) in the above embodiments can also be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signals), or combinations thereof.

[0842] In the case where the above notification is made via MAC CE, the MAC CE can also be identified by including a new LCID in the MAC subheader that is not specified in the existing standard.

[0843] In cases where the above notification is sent via UCI, the above notification may also be sent using PUCCH or PUSCH.

[0844] Furthermore, the notification of any information from the UE in the above embodiments can also be carried out periodically, semi-persistently, or non-periodically.

[0845] <<Application of Each Implementation Method>>

[0846] In the UE / BS, a specific processing / operation / control / conception / information for at least one of the above-described implementations may also be applied (used) if any one or more of the following conditions are met: These are high-level parameters that are set to represent the specific processing / operation / control / concept / information described above. The specific processing / operation / control / concept / information mentioned above is determined based on associated high-level parameters. The aforementioned specific processing / operation / control / concept / information is specified / activated / triggered via MAC CE / DCI / UCI / resource / channel / RS. The report or support indicates the specific UE capability mentioned above, which refers to the specific processing / operation / control / conception / information (or associated information). The application of the aforementioned specific processing / operation / control / conception / information is judged based on specific conditions.

[0847] The specific UE capability mentioned above can also represent at least one of the following: ◆Supports the specific processing / operation / control / concepts / information mentioned above. ◆The capabilities of each implementation method.

[0848] ◆The capabilities of each option in each implementation, or the capabilities of a combination of multiple options in each implementation.

[0849] ◆The ability of each selection branch in each implementation, or the ability of a combination of multiple selection branches in each implementation.

[0850] ◆Supports reporting for more than one SD beam across multiple layers.

[0851] ◆Supports reporting for more than one SD beam with two polarizations.

[0852] Furthermore, the aforementioned specific UE capabilities can be capabilities that apply across all frequencies (frequency-independent and common), capabilities that apply to each frequency (e.g., one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), capabilities that apply to each frequency range (e.g., Frequency Range 1 (FR1)), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities that apply to each subcarrier spacing (SCS) or capabilities that apply to each feature set (FS) or each feature set per component carrier (FSPC).

[0853] Furthermore, the aforementioned specific UE capabilities can be either capabilities that apply to all duplex modes (commonly regardless of the duplex mode) or capabilities that apply to each duplex mode (e.g., Time Division Duplex (TDD) and Frequency Division Duplex (FDD)).

[0854] If the above conditions are not met, the UE / BS may also follow the operations specified in the existing 3GPP version.

[0855] (Postscript)

[0856] With respect to one embodiment of this disclosure, the following invention is noted.

[0857] [Postscript 1]

[0858] A terminal having: The receiving unit receives settings for a CSI report, representing settings related to more than 32 antenna ports, i.e., CSI-reference signals (RS resources), and settings related to the number of antenna ports in two dimensions; and... The control unit controls the transmission of the CSI report. The CSI report contains one or more indexes representing one or more beams for multiple layers corresponding to the first polarization.

[0859] [Postscript 2]

[0860] The terminal as described in Appendix 1, wherein, The CSI report, for the multiple layers, includes one or more indexes representing one or more phase adjustments of the second polarization.

[0861] [Postscript 3]

[0862] The terminal as described in Appendix 1 or Appendix 2, wherein, The one or more beams are beams per layer or per codeword.

[0863] [Postscript 4]

[0864] The terminal as described in any one of Annexes 1 to 3, wherein, The one or more beams are common to any one of the plurality of layers, and to any two of the plurality of layers.

[0865] (Wireless communication system)

[0866] The structure of a wireless communication system according to one embodiment of this disclosure will now be described. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of this disclosure.

[0867] Figure 50 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment. The wireless communication system 1 (also referred to simply as System 1) may also be a system that uses Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) as standardized by the Third Generation Partnership Project (3GPP) to achieve communication.

[0868] Furthermore, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0869] In EN-DC, the LTE (E-UTRA) base station (eNB) is the Master Node (MN), and the NR base station (gNB) is the Secondary Node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0870] Wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (e.g., MN and SN are dual connectivity between NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0871] The wireless communication system 1 may also include a base station 11 forming a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a-12c) configured within the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. The user terminal 20 may also be located within at least one cell. The configuration, number, shape, size, etc., of each cell and the user terminal 20 are not limited to the manner shown in the figure. Hereinafter, without distinguishing between base stations 11 and 12, they will be collectively referred to as base station 10.

[0872] Alternatively, the wireless communication system 1 can also utilize Multiple Input Multiple Output (MIMO). For example, a cell can be formed by one antenna / base station 10 or by multiple antennas / base stations 10. A [virtual] cell (e.g., also called a super cell) can also be composed of multiple [virtual] cells (e.g., also called sub-cells). A super cell can also be equivalent to a cell with a fixed physical range, and a sub-cell can also be equivalent to a cell with a semi-static / dynamically varying physical range. In this case, the wireless communication system 1 can also be called a cell-free system.

[0873] User terminal 20 may also connect to at least one of multiple base stations 10. User terminal 20 may also utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0874] Each CC can also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). Macro cell C1 can also be included in FR1, and small cell C2 can also be included in FR2. For example, FR1 can also be a frequency band below 6 GHz (sub-6 GHz), and FR2 can also be a frequency band above 24 GHz (above-24 GHz). In addition, the frequency bands, definitions, etc. of FR1 and FR2 are not limited to these; for example, FR1 can also be equivalent to a frequency band higher than FR2.

[0875] In addition, in each CC, the user terminal 20 may also use at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) for communication.

[0876] Multiple base stations 10 can also be connected via wired (e.g., fiber optic cable based on the Common Public Radio Interface (CPRI), X2 / Xn interface, etc.) or wireless (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11, which is equivalent to a host station, can also be referred to as an Integrated Access Backhaul (IAB) donor, and base station 12, which is equivalent to a relay station, can also be referred to as an IAB node.

[0877] Base station 10 may also be connected to core network 30 via other base stations 10 or directly. Core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0878] The core network 30 may also include, for example, user plane functions (UPF), access and mobility management functions (AMF), session management functions (SMF), unified data management (UDM), application functions (AF), data network (DN), location management functions (LMF), and network functions (NF) such as operation, administration and maintenance (OAM). Alternatively, multiple functions can be provided through a single network node. Furthermore, communication with external networks (e.g., the Internet) can also be achieved via the DN.

[0879] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0880] In wireless communication system 1, wireless access methods based on Orthogonal Frequency Division Multiplexing (OFDM) can also be used. For example, in at least one of the downlink (DL) and uplink (UL) links, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA) can also be used.

[0881] The wireless access method can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be used in the wireless access methods of UL and DL.

[0882] In the wireless communication system 1, the downlink channel can also be a shared downlink channel (Physical Downlink Shared Channel (PDSCH)), a broadcast channel (Physical Broadcast Channel (PBCH)), or a downlink control channel (Physical Downlink Control Channel (PDCCH)) shared by each user terminal 20.

[0883] In addition, in the wireless communication system 1, the uplink channel can also be the shared uplink channel (Physical Uplink Shared Channel (PUSCH)), the uplink control channel (Physical Uplink Control Channel (PUCCH)), the random access channel (Physical Random Access Channel (PRACH)) shared by each user terminal 20, etc.

[0884] User data, high-level control information, and System Information Blocks (SIBs) are transmitted via the PDSCH. User data and high-level control information can also be transmitted via the PUSCH. In addition, Master Information Blocks (MIBs) can also be transmitted via the PBCH.

[0885] Lower-layer control information can also be transmitted via PDCCH. This lower-layer control information may include, for example, downlink control information (DCI), which includes scheduling information for at least one of PDSCH and PUSCH.

[0886] Additionally, the DCI that schedules PDSCH can also be called DL allocation, DL DCI, etc., and the DCI that schedules PUSCH can also be called UL authorization, UL DCI, etc. Furthermore, PDSCH can be rewritten as DL data, and PUSCH can be rewritten as UL data.

[0887] In PDCCH detection, a Control Resource Set (CORESET) and a search space can also be utilized. A CORESET corresponds to the resources used to search for DCIs. The search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor CORESETs associated with a specific search space based on search space settings.

[0888] A search space can also correspond to one or more PDCCH candidates equivalent to one or more aggregation levels. One or more search spaces can also be referred to as a search space set. In addition, the terms "search space", "search space set", "search space setting", "search space set setting", "CORESET", and "CORESET setting" in this disclosure can be rewritten interchangeably.

[0889] The PUCCH can also transmit uplink control information (uplink control information (UCI)) that includes at least one of the following: Channel State Information (CSI), delivery confirmation information (e.g., also known as Hybrid Automatic Repeat Request ACK Knowledge (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR). The PRACH can also transmit random access preambles used for establishing connections with the cell.

[0890] In addition, in this disclosure, downlink, uplink, etc., may be described without the word "link". Furthermore, various channels may be described without the word "physical".

[0891] In wireless communication system 1, synchronization signals (SS) and downlink reference signals (DL-RS) can also be transmitted. In wireless communication system 1, DL-RS can also transmit cell-specific reference signals (CRS), channel state information reference signals (CSI-RS), demodulation reference signals (DMRS), positioning reference signals (PRS), and phase tracking reference signals (PTRS).

[0892] Synchronization signals can be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be called an SS / PBCH block, SS block (SSB), etc. In addition, SS, SSB, etc. can also be called reference signals.

[0893] Furthermore, in wireless communication system 1, the uplink reference signal (UL-RS) can also transmit measurement reference signals (sounding reference signals (SRS)) and demodulation reference signals (DMRS). Additionally, DMRS can also be referred to as user terminal-specific reference signals (UE-specific reference signals).

[0894] (Base station)

[0895] Figure 51This diagram illustrates an example of the structure of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmit / receive unit 120, a transmit / receive antenna 130, and a transmission path interface (transmission line interface) 140. Alternatively, the control unit 110, the transmit / receive unit 120, the transmit / receive antenna 130, and the transmission path interface 140 may each be provided in more than one manner.

[0896] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the base station 10 may also possess other functional blocks required for wireless communication. A portion of the processing of each unit described below may also be omitted.

[0897] The control unit 110 performs overall control of the base station 10. The control unit 110 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the art to which this disclosure pertains.

[0898] The control unit 110 can also control signal generation and scheduling (e.g., resource allocation, mapping). The control unit 110 can also control transmission, reception, and measurement using the transmit / receive unit 120, transmit / receive antenna 130, and transmission path interface 140. The control unit 110 can also generate data, control information, and sequences to be transmitted as signals and forward them to the transmit / receive unit 120. The control unit 110 can also perform call processing (setting, releasing, etc.) of the communication channel, status management of the base station 10, and management of wireless resources.

[0899] The transmitting / receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting / receiving unit 120 may be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0900] The transmitting and receiving unit 120 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 1211 and an RF unit 122. The receiving unit can also be composed of a receiving processing unit 1212, an RF unit 122, and a measurement unit 123.

[0901] The transmitting and receiving antenna 130 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0902] The transmitting / receiving unit 120 can also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 can also receive the aforementioned uplink channel, uplink reference signal, etc.

[0903] The transmitting and receiving unit 120 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0904] The transmitting and receiving unit 120 (transmitting processing unit 1211) may, for example, perform processing at the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer (e.g., RLC retransmission control), and Medium Access Control (MAC) layer (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 110, and generate a bit string to be transmitted.

[0905] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform transmission processing such as channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), Discrete Fourier Transform (DFT) processing (as needed), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output the baseband signal.

[0906] The transmitting and receiving unit 120 (RF unit 122) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 130.

[0907] On the other hand, the transmitting and receiving unit 120 (RF unit 122) can also amplify, filter, and demodulate the signals of the wireless frequency band received through the transmitting and receiving antenna 130 into the baseband signal.

[0908] The transmitting and receiving unit 120 (receiving and processing unit 1212) can also perform receiving and processing on the acquired baseband signal, including analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data, etc.

[0909] The transmitting / receiving unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc., based on the received signal. The measurement unit 123 can also measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 110.

[0910] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between the device included in the core network 30 (e.g., the network node providing the NF), other base stations 10, etc., and can also acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0911] In addition, the transmitting unit and receiving unit of the base station 10 in this disclosure may also be composed of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0912] Additionally, base station 10 can be separated into three elements: Radio Unit (RU), Distributed Unit (DU), and Central Unit (CU). For example, the RU can implement RF processing (digital beamforming, digital-to-analog conversion, analog beamforming, etc.) and lower-level physical layer functions (precoding, IFFT, FFT, etc.). The DU can implement higher-level physical layer functions (from coding to resource element mapping, etc.), MAC layer functions, and RLC layer functions. The CU can also implement PDCP layer, Service Data Adaptation Protocol (SDAP) layer, and RRC layer functions.

[0913] In this disclosure, base station 10 may include a device that implements all the functions of RU, DU, and CU, or it may include multiple devices that implement a portion of the functions of RU, DU, and CU respectively and are interconnected. In this disclosure, base station 10 may also be rewritten in relation to RU / DU / CU.

[0914] The transmitting / receiving unit 120 can also transmit settings for a CSI report, representing settings related to one or more Channel State Information (CSI)-Reference Signal (RS) resources associated with more than 32 antenna ports, and settings related to the number of said antenna ports in two dimensions. The control unit 110 can also control the reception of said CSI report. The CSI report may also contain one or more indices representing one or more beams for multiple layers corresponding to the first polarization.

[0915] (User terminal)

[0916] Figure 52 This diagram illustrates an example of the structure of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Alternatively, more than one of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be included.

[0917] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the user terminal 20 may also have other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0918] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the technical field to which this disclosure pertains.

[0919] The control unit 210 can also control signal generation, mapping, etc. The control unit 210 can also control transmission, reception, measurement, etc., using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmission / reception unit 220.

[0920] The transmitting / receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting / receiving unit 220 may be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0921] The transmitting and receiving unit 220 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit can also be composed of a receiving processing unit 2212, an RF unit 222, and a measurement unit 223.

[0922] The transmitting and receiving antenna 230 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0923] The transmitting / receiving unit 220 can also receive the downlink channel, synchronization signal, downlink reference signal, etc., mentioned above. The transmitting / receiving unit 220 can also transmit the uplink channel, uplink reference signal, etc., mentioned above.

[0924] The transmitting and receiving unit 220 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0925] The transmitting and receiving unit 220 (transmitting processing unit 2211) may, for example, perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 210, and generate the bit string to be transmitted.

[0926] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output the baseband signal.

[0927] Furthermore, whether or not to apply DFT processing can be based on the transform precoding settings. For a certain channel (e.g., PUSCH), if transform precoding is enabled, the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above for transmitting the channel using the DFT-s-OFDM waveform; otherwise, the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above for transmitting the channel without performing DFT processing.

[0928] The transmitting and receiving unit 220 (RF unit 222) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 230.

[0929] On the other hand, the transmitting and receiving unit 220 (RF unit 222) can also amplify, filter, demodulate, etc., the signals of the wireless frequency band received by the transmitting and receiving antenna 230.

[0930] The transmitting and receiving unit 220 (receiving and processing unit 2212) can also perform receiving and processing on the acquired baseband signal, such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to obtain user data.

[0931] The transmitting / receiving unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can also perform RRM measurements, CSI measurements, etc., based on the received signal. The measurement unit 223 can also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 210.

[0932] Additionally, the measurement unit 223 can also derive channel measurements for CSI calculation based on channel measurement resources. Channel measurement resources can be, for example, non-zero power (NZP) CSI-RS resources. Furthermore, the measurement unit 223 can also derive interference measurements for CSI calculation based on interference measurement resources. Interference measurement resources can be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc. Additionally, CSI-IM can also be referred to as CSI-Interference Management (IM), and can be interchanged with zero power (ZP) CSI-RS. Furthermore, in this disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc., can also be interchanged.

[0933] Alternatively, the transmitting and receiving units of the user terminal 20 in this disclosure may also be composed of at least one transmitting / receiving unit 220 and transmitting / receiving antenna 230.

[0934] The transmit / receive unit 220 can also receive settings for a CSI report, which represent settings related to one or more Channel State Information (CSI)-Reference Signal (RS) resources associated with more than 32 antenna ports, and settings related to the number of said antenna ports in two dimensions. The control unit 210 can also control the transmission of the CSI report. The CSI report may also contain one or more indices representing one or more beams for multiple layers corresponding to the first polarization.

[0935] The CSI report may also contain more than one index representing more than one phase adjustment of the second polarization for the multiple layers.

[0936] The one or more beams can also be beams per layer or per codeword.

[0937] The one or more beams can also be common to any of the multiple layers, and to any two of the multiple layers.

[0938] (Hardware structure)

[0939] Furthermore, the block diagrams used in the description of the above embodiments illustrate functional units. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Moreover, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using a single device that is physically or logically combined, or it can be implemented by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. A functional block can also be implemented by combining the aforementioned single device or multiple devices with software.

[0940] Here, the functions include judgment, decision, determination, calculation, calculation, processing, export, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regard as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, a functional block (structural unit) that implements the sending function can also be called a transmitting unit, transmitter, etc. As described above, the implementation method of any of them is not particularly limited.

[0941] For example, in one embodiment of this disclosure, the base station, user terminal, etc., can also function as a computer for processing the wireless communication method of this disclosure. Figure 53 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment. The base station 10 and the user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0942] Furthermore, in this disclosure, terms such as apparatus, circuit, device, section, and unit can be interchanged. The hardware structure of base station 10 and user terminal 20 can be configured to include one or more of the apparatuses shown in the figures, or it can be configured not to include any of the apparatuses.

[0943] For example, only one processor 1001 is shown, but there can be multiple processors. Furthermore, processing can be performed by one processor, or simultaneously, sequentially, or by two or more processors using other methods. Additionally, processor 1001 can be implemented using more than one chip.

[0944] Regarding the various functions in the base station 10 and the user terminal 20, for example, by reading specific software (programs) into hardware such as the processor 1001 and the memory 1002, the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of reading out and writing data in the memory 1002 and the storage device 1003, thereby achieving the functions.

[0945] The processor 1001, for example, enables the operating system to operate and control the computer as a whole. The processor 1001 may also be composed of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, at least a portion of the control unit 110 (210), the transmit / receive unit 120 (220), etc., described above may also be implemented by the processor 1001.

[0946] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes accordingly. As a program, a program that causes the computer to perform at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001; similar implementations can be made for other functional blocks.

[0947] The memory 1002 may also be a computer-readable recording medium, such as being composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage media. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 is capable of storing executable programs (program code), software modules, etc., for implementing the wireless communication method according to an embodiment of this disclosure.

[0948] Storage device 1003 may also be a computer-readable recording medium, such as a flexible disc, floppy disk, optical disk (e.g., compact disc ROM, CD-ROM), digital multifunction disk, Blu-ray disc, removable disk, hard disk, smart card, flash memory device (e.g., card, stick, key drive), stripe, database, server, or at least one other suitable storage medium. Storage device 1003 may also be referred to as an auxiliary storage device.

[0949] The communication device 1004 is hardware (transmitting and receiving device) used for communication between computers via at least one of a wired network and a wireless network. It is also referred to as a network device, network controller, network interface card (NIC), communication module, etc. To implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the aforementioned transmit / receive unit 120 (220) and transmit / receive antenna 130 (230) may also be implemented by the communication device 1004. The transmit / receive unit 120 (220) may also be implemented by physically or logically separating the transmit unit 120a (220a) and the receive unit 120b (220b).

[0950] Input device 1005 is an input device that receives input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, light-emitting diode (LED) lamp, etc.). Alternatively, input device 1005 and output device 1006 can also be an integrated structure (e.g., a touch panel).

[0951] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 can be configured as a single bus or as different buses between the devices.

[0952] Furthermore, the base station 10 and the user terminal 20 can also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field-programmable gate array (FPGA), and can also use this hardware to implement part or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0953] In addition, the devices included in the core network 30 (e.g., network nodes that provide NF) can also be implemented through the functional block / hardware structure described above.

[0954] (Variation example)

[0955] Furthermore, the terms described in this disclosure, as well as those necessary for understanding this disclosure, may be replaced with terms that have the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be interchanged. Additionally, a signal may also be a message. A reference signal can also be abbreviated as RS, and may be referred to as pilot, pilot signal, etc., depending on the applied standard. Furthermore, a component carrier (CC) may also be referred to as cell, frequency carrier, carrier frequency, etc.

[0956] A radio frame can also be composed of one or more periods (frames) in the time domain. Each of these periods (frames) that constitute a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set (numerology).

[0957] Here, the parameter set can also be communication parameters applied in at least one of the transmission and reception of a signal or channel. For example, the parameter set can also represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0958] In the time domain, a time slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.). In addition, a time slot can also be a time unit based on a set of parameters.

[0959] A time slot can also contain multiple mini-time slots. Each mini-time slot can also consist of one or more symbols in the time domain. Furthermore, a mini-time slot can also be called a sub-time slot. A mini-time slot can also consist of fewer symbols than a time slot. PDSCH (or PUSCH) transmitted in a time unit larger than a mini-time slot can also be called PDSCH (PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using mini-time slots can also be called PDSCH (PUSCH) mapping type B.

[0960] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols can also use their respective other names. Furthermore, the time units such as frames, subframes, time slots, mini-time slots, and symbols in this disclosure can be interchanged.

[0961] For example, a subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, and a time slot or a mini-time slot can also be called a TTI. That is, at least one of a subframe and a TTI can be a subframe in existing LTE (1ms), a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing TTI may not be called a subframe, but rather a time slot, mini-time slot, etc.

[0962] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules radio resources (frequency bandwidth, transmit power, etc., available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0963] TTI can also be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., and can also be a unit of processing such as scheduling and link adaptation. In addition, when a TTI is given, the actual time interval (e.g., the number of symbols) mapped to transmission blocks, code blocks, codewords, etc. can be shorter than the TTI.

[0964] Additionally, where a time slot or a mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can also be the minimum time unit for scheduling. Furthermore, the number of time slots (mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0965] A TTI with a duration of 1 ms can also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI can also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub-time slot, a time slot, etc.

[0966] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can also be rewritten as a TTI with a duration of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) can also be rewritten as a TTI with a duration of less than a long TTI but more than 1 ms.

[0967] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can also contain one or more consecutive subcarriers. The number of subcarriers in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers in an RB can also be determined based on the parameter set.

[0968] Furthermore, an RB can contain one or more symbols in the time domain, and can also be a time slot, a mini-time slot, a subframe, or the length of a TTI. A TTI, a subframe, etc., can also be composed of one or more resource blocks.

[0969] In addition, one or more RBs can also be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0970] In addition, a resource block can also consist of one or more resource elements (REs). For example, an RE can also be a radio resource area consisting of a subcarrier and a symbol.

[0971] The Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RBs) used for a certain parameter set in a carrier. Here, common RBs can also be determined by the index of RBs based on the common reference point of the carrier. PRBs can also be defined in a BWP and appended with numbers within that BWP.

[0972] A BWP can also include a UL BWP (the BWP used by UL) and a DL BWP (the BWP used by DL). For a UE, one or more BWPs can also be set within a single carrier.

[0973] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Furthermore, the terms "cell," "carrier," etc., in this disclosure can be rewritten as "BWP."

[0974] Furthermore, the structures described above, such as radio frames, subframes, time slots, mini-time slots, and symbols, are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0975] Furthermore, the information, parameters, etc., described in this disclosure can be represented by absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by a specific index.

[0976] In this disclosure, the names used for parameters, etc., are not limiting names in any respect. Furthermore, the mathematical formulas, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name; therefore, the various names assigned to these various channels and information elements are not limiting names in any respect.

[0977] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be mentioned throughout the above description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0978] Furthermore, information, signals, etc., can be output in at least one of the following directions: from higher level (upper layer) to lower level (lower layer), and from lower layer to higher level. Information, signals, etc., can also be input and output via multiple network nodes.

[0979] Input and output information, signals, etc., can be stored in a specific location (e.g., memory) or managed using a management table. Input and output information, signals, etc., can be overwritten, updated, or appended. Output information, signals, etc., can also be deleted. Input information, signals, etc., can also be sent to other devices.

[0980] Regarding any information (e.g., variables, constants, parameters) recorded in this disclosure, even if not specifically explicitly stated in the above embodiments, information representing / determining the value of such arbitrary information (or information associated with such arbitrary information) can be notified from any first device (e.g., UE / base station) to any second device (e.g., base station / UE).

[0981] The notification of information is not limited to the methods / implementations described in this disclosure, and may also be carried out by other methods. For example, the notification of information in this disclosure may also be implemented by physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI), etc.), higher layer signaling (e.g., radio resource control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB) etc.), medium access control (MAC) signaling), other signals, or combinations thereof.

[0982] In addition, physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. Furthermore, RRC signaling can also be referred to as RRC messages, such as RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc. Additionally, MAC signaling can also be notified using, for example, a MAC Control Element (CE).

[0983] Furthermore, notification of specific information (e.g., a notification of “is X”) is not limited to explicit notification, but can also be implicit (e.g., by not providing that specific information, or by providing other information).

[0984] The determination can be made by a value represented by a single bit (0 or 1), by a true or false value (boolean), or by a numerical comparison (e.g., a comparison with a specific value).

[0985] Whether software is called software, firmware, middleware, microcode, hardware description language, or any other name, it should be broadly interpreted to refer to instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0986] Furthermore, software, instructions, and information can also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0987] The terms “system” and “network” as used in this disclosure are interchangeable. “Network” may also mean devices included in a network (e.g., base stations).

[0988] In this disclosure, the terms “precoding”, “precoder”, “weight (precoding weight)”, “quasi-co-location (QCL)”, “transmission configuration indication state (TCI state)”, “spatial relation”, “spatial domain filter”, “transmit power”, “phase rotation”, “antenna port”, “layer”, “number of layers”, “rank”, “resource”, “resource set”, “beam”, “beamwidth”, “beam angle”, “antenna”, “antenna element”, “panel”, “UE panel”, “transmitting entity”, and “receiving entity” are used interchangeably.

[0989] Furthermore, in this disclosure, the antenna port can also be rewritten with an antenna port used for any signal / channel (e.g., a DeModulation Reference Signal (DMRS) port). In this disclosure, resources can also be rewritten with resources used for any signal / channel (e.g., reference signal resources, SRS resources, etc.). Additionally, resources can also include time / frequency / code / spatial / power resources. Moreover, the spatial domain transmission filter can also include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0990] The aforementioned groups may include, for example, at least one of the following: spatial relation group, code division multiplexing (CDM) group, reference signal (RS) group, control resource set (CORESET) group, PUCCH group, antenna port group (e.g., DMRS port group), layer group, resource group, beam group, antenna group, panel group, etc.

[0991] Furthermore, in this disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, Codeword (CW), Transport Block (TB), RS, etc., can also be rewritten to each other.

[0992] Furthermore, in this disclosure, the TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, and joint TCI state can also be rewritten to each other.

[0993] Furthermore, in this disclosure, terms such as "QCL", "QCL concept", "QCL relationship", "QCL type information", "QCL property (QCLproperty / properties)", "specific QCL type (e.g., type A, type D) property", and "specific QCL type (e.g., type A, type D)" can be rewritten interchangeably.

[0994] In this disclosure, indexes, identifiers (IDs), indicators, indications, resource IDs, etc., can also be interchanged. In this disclosure, sequences, lists, sets, groups, clusters, subsets, etc., can also be interchanged.

[0995] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) can be interchanged. "Spatial relationship information (TCI state)" can also be interchanged with "a set of spatial relationship information (TCI states)," "one or more spatial relationship information," etc. TCI state and TCI can also be interchanged. Spatial relationship information and spatial relationship can also be interchanged.

[0996] In this disclosure, the terms "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access Point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "Panel", "Cell", "Sector", "Cell Group", "Carrier", and "Component Carrier" are used interchangeably. There are also instances where the terms macro cell, small cell, femtocell, and picocell are used to refer to a base station.

[0997] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​at least one of the base station and base station subsystem providing communication services within that coverage area.

[0998] In this disclosure, the information sent by the base station to the terminal can also be rewritten with the control / operation instructed by the base station to the terminal based on that information.

[0999] In this disclosure, the terms “Mobile Station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” are used interchangeably.

[1000] There are also instances where mobile stations are referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or several other appropriate terms.

[1001] At least one of the base station and the mobile station can also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Additionally, at least one of the base station and the mobile station can also be a device mounted on a moving object, the moving object itself, etc.

[1002] The term "mobile body" refers to a movable object whose speed is arbitrary, including situations where the body is stationary. Examples of such mobile bodies include vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, loading shovels, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, trolleys, rickshaws, ships (including vessels and other watercraft), airplanes, rockets, satellites, drones, multi-rotor aircraft, quadcopters, balloons, and objects carried on them, but are not limited to these. Furthermore, the mobile body can also be a mobile body that moves autonomously based on operational commands.

[1003] The mobile entity can be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile entity moving in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). Additionally, at least one of the base station and the mobile station may include a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[1004] Figure 54 This figure illustrates an example of a vehicle according to one embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a gear shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a speed sensor 51, a pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a gear shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[1005] The drive unit 41 is comprised of at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is configured to include at least a steering wheel (also called a handlebar) and to perform directional control on at least one of the front wheel 46 and the rear wheel 47 based on the operation of the steering wheel by the user.

[1006] The electronic control unit 49 consists of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (e.g., an input / output (IO) port) 63). Signals from various sensors 50-58 present in the vehicle are input into the electronic control unit 49. The electronic control unit 49 can also be referred to as an ECU (Electronic Control Unit).

[1007] The signals from various sensors 50-58 include current signals from current sensor 50 that senses the current of the motor, speed signals from front wheel 46 / rear wheel 47 obtained by speed sensor 51, air pressure signals from front wheel 46 / rear wheel 47 obtained by air pressure sensor 52, vehicle speed signals obtained by vehicle speed sensor 53, acceleration signals obtained by acceleration sensor 54, accelerator pedal 43 depress amount signals obtained by accelerator pedal sensor 55, brake pedal 44 depress amount signals obtained by brake pedal sensor 56, shift lever 45 operation signals obtained by shift lever sensor 57, and detection signals obtained by object detection sensor 58 for detecting obstacles, vehicles, pedestrians, etc.

[1008] The information service unit 59 comprises various devices such as a vehicle navigation system, audio system, speakers, display, television, and radio, used to provide (output) various information such as driving information, traffic information, and entertainment information, as well as one or more ECUs that control these devices. The information service unit 59 uses information obtained from external devices via the communication module 60, etc., to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[1009] The information service unit 59 may include input devices that accept input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) or output devices that implement output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[1010] The driver assistance system unit 64 comprises various devices used to provide functions for preventing accidents and reducing the driver's workload, such as millimeter-wave radar, light detection and ranging (LiDAR), cameras, positioning devices (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyroscope systems (e.g., Inertial Measurement Unit (IMU)), Inertial Navigation System (INS)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. Furthermore, the driver assistance system unit 64 sends and receives various information via a communication module 60 and implements driver assistance or autonomous driving functions.

[1011] The communication module 60 can communicate with the microprocessor 61 and the structural elements of the vehicle 40 via the communication port 63. For example, the communication module 60 sends and receives data (information) between the microprocessor 61 and the memory (ROM, RAM) 62, and various sensors 50-58 in the drive unit 41, steering control unit 42, accelerator pedal 43, brake pedal 44, gear shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, and electronic control unit 49 of the vehicle 40 via the communication port 63.

[1012] The communication module 60 is controlled by the microprocessor 61 of the electronic control unit 49 and is a communication device capable of communicating with external devices. For example, it can transmit and receive various types of information between external devices via wireless communication. The communication module 60 can be located either inside or outside the electronic control unit 49. The external device can be, for example, the aforementioned base station 10, user terminal 20, etc. Furthermore, the communication module 60 can be, for example, at least one of the aforementioned base station 10 and user terminal 20 (or it can function as at least one of the base station 10 and user terminal 20).

[1013] The communication module 60 can also wirelessly transmit at least one of the following to an external device: signals from the various sensors 50-58 described above that are input to the electronic control unit 49, information obtained based on these signals, and information based on input from an external source (user) obtained via the information service unit 59. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc., can also be referred to as input units that receive input. For example, the PUSCH transmitted via the communication module 60 can also contain information based on the aforementioned input.

[1014] The communication module 60 receives various information (traffic information, traffic light information, vehicle-to-vehicle information, etc.) sent from external devices and displays it to the information service unit 59 provided by the vehicle. The information service unit 59 can also be referred to as an output unit that outputs information (for example, outputs information to devices such as displays and speakers based on the PDSCH received through the communication module 60 (or the data / information decoded from the PDSCH).

[1015] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. The microprocessor 61 can also control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, gear shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, and various sensors 50-58 of the vehicle 40 based on the information stored in the memory 62.

[1016] Furthermore, the base station in this disclosure can also be rewritten as a user terminal. For example, various methods / implementations of this disclosure can be applied to structures where communication between the base station and the user terminal is replaced by communication between multiple user terminals (e.g., also referred to as device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, it can also be configured such that the user terminal 20 has the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be rewritten as terms corresponding to inter-terminal communication (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can also be rewritten as sidelink channel.

[1017] Similarly, the user terminal in this disclosure can also be rewritten as a base station. In this case, it can also be configured such that the base station 10 has the functions of the user terminal 20 described above.

[1018] In this disclosure, operations are assumed to be performed by the base station, and sometimes, depending on the circumstances, by its upper node. Clearly, in a network containing one or more network nodes having a base station, various operations for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (e.g., considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or combinations thereof.

[1019] The various methods / implementations described in this disclosure can be used individually or in combination, and can be switched as needed during execution. Furthermore, the processing procedures, timing sequences, flowcharts, etc., of the various methods / implementations described in this disclosure can be rearranged as long as they do not contradict each other. For example, for the method described in this disclosure, the illustrated order is used to indicate various steps, but the order in which they are indicated is not limited.

[1020] The various methods / implementations described in this disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Futuregeneration radio access (FX), Global System for Mobile Communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE This includes 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-Wideband (UWB)), Bluetooth (registered trademark), systems utilizing other suitable wireless communication methods, and next-generation systems derived from enhancements, modifications, creations, or specifications based on them. Furthermore, multiple systems can be combined (e.g., LTE or LTE-A, combinations with 5G, etc.) for application.

[1021] As used in this disclosure, the term "based on" does not mean "based on only" unless otherwise specified. In other words, the term "based on" means both "based on only" and "based on at least".

[1022] Any reference to an element using the designations "first," "second," etc., as used in this disclosure does not comprehensively limit the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to the first and second elements does not imply that only two elements may be used, or that the first element must take precedence over the second element in some form.

[1023] The term "determining" as used in this disclosure can encompass a wide variety of operations. For example, "determining" can also refer to judging, calculating, computing, processing, deriving, investigating, looking up (search, inquiry) (e.g., searching in a table, database or other data structure), and ascertaining.

[1024] In addition, "judgment (decision)" can also refer to receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, accessing (e.g., accessing data in memory), etc., as situations where "judgment (decision)" is performed.

[1025] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, or comparing are considered as making a "judgment (decision)". That is, "judgment (decision)" can also refer to certain operations as making a "judgment (decision)". In this disclosure, "judgment (decision)" can also be rewritten in relation to the operations described above.

[1026] Furthermore, in this disclosure, "determine / determining" can also be interchanged with "assume / assuming," "expect / expecting," "consider / considering," etc. Additionally, in this disclosure, "not assuming..." can also be interchanged with "assuming not...".

[1027] In this disclosure, "expect" can also be interchanged with "be expected." For example, "expect(s)..." (where "..." can also be expressed as a that clause, an infinitive to, etc.) can also be interchanged with "be expected..." or "perform..." (in the case of "..." being an infinitive to "to," the verb with "to" removed). "Does not expect..." can also be interchanged with "be not expected..." or "does not perform..." (in the case of "..." being an infinitive to "to," the verb with "to" removed). Furthermore, "An apparatus A is not expected..." can also be interchanged with "Apparatus B other than apparatus A does not expect apparatus A to perform..." (for example, if apparatus A is a UE, apparatus B can also be a base station).

[1028] The term "maximum transmit power" as used in this disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[1029] As used in this disclosure, the terms “connected,” “coupled,” or all variations thereof, refer to all direct or indirect connections or combinations between two or more elements, and can include cases where there is one or more intermediate elements between two mutually “connected” or “coupled” elements. The connections or combinations between elements can be physical, logical, or a combination thereof. For example, “connection” can also be rewritten as “access.”

[1030] In this disclosure, when two elements are connected, it is possible to consider using more than one wire, cable, printed electrical connection, etc. to be "connected" or "combined" with each other, and as several non-limiting and non-exclusive examples, to use electromagnetic energy with wavelengths having wireless frequency domain, microwave region, light (both visible and invisible) region to be "connected" or "combined" with each other.

[1031] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other." Additionally, the term can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[1032] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," mean inclusive. Furthermore, the term "or" as used in this disclosure does not mean XOR.

[1033] In this disclosure, for example, in cases where articles are added through translation, such as a, an, and the in English, the disclosure may also include cases where the noun following these articles is in a plural form.

[1034] In this disclosure, terms such as "below," "less than," "above," "more than," and "equal to" can be interchanged. Furthermore, in this disclosure, statements meaning "good," "bad," "large," "small," "high," "low," "early," "late," "wide," and "narrow" can be interchanged, not limited to the positive, comparative, and superlative degrees. Additionally, in this disclosure, statements meaning "good," "bad," "large," "small," "high," "low," "early," "late," "wide," and "narrow" can also be interchanged as expressions accompanied by "i" (where i is any integer), not limited to the positive, comparative, and superlative degrees (e.g., "highest" can also be interchanged with "i-th highest").

[1035] In this disclosure, "of", "for", "regarding", "related to", "associated with", etc., can also be rewritten interchangeably.

[1036] In this disclosure, phrases such as "when A, B", "if A, then B", "B upon A", "B in response to A", "B based on A", "B during / while A", "B before A", "B at (the same time as) / on A", "B after A", "B since A", and "B until A" can be rewritten interchangeably. Furthermore, A and B can be appropriately replaced with nouns, gerunds, or other suitable expressions depending on the context. Additionally, the time difference between A and B can be approximately 0 (immediately following or immediately preceding). Moreover, a time offset can be applied to the time A occurs. For example, "A" can also be rewritten interchangeably with "before / after the time offset of A". This time offset (e.g., more than one symbol / slot) can be predetermined or determined by the UE based on the information it is notified of.

[1037] In this disclosure, timing, moment, time, time instance, arbitrary time unit (e.g., time slot, sub-time slot, symbol, subframe), period, opportunity, resource, etc., can also be rewritten to each other.

[1038] The inventions disclosed herein have been described in detail above. However, it will be apparent to those skilled in the art that the inventions disclosed herein are not limited to the embodiments described herein. The description herein is for illustrative purposes only and is not intended to limit the inventions disclosed herein in any way.

Claims

1. A terminal, comprising: The receiving unit receives settings for CSI reports, which represent settings related to more than one channel state information (CSI) associated with more than 32 antenna ports, i.e., CSI-reference signals (RS resources), and settings related to the number of antenna ports in two dimensions; and... The control unit controls the transmission of the CSI report. The CSI report contains one or more indexes representing one or more beams for multiple layers corresponding to the first polarization.

2. The terminal as described in claim 1, wherein, The CSI report, for the multiple layers, includes one or more indexes representing one or more phase adjustments of the second polarization.

3. The terminal as described in claim 1, wherein, The one or more beams are beams per layer or per codeword.

4. The terminal as described in claim 1, wherein, The one or more beams are common to any one of the plurality of layers, and to any two of the plurality of layers.

5. A wireless communication method for a terminal, comprising: The steps of receiving a CSI report indicating settings related to more than one Channel State Information (CSI) reference signal (RS resource) associated with more than 32 antenna ports, and settings related to the number of said antenna ports in two dimensions; and The steps for controlling the transmission of the CSI report, The CSI report contains one or more indexes representing one or more beams for multiple layers corresponding to the first polarization.

6. A base station, comprising: The transmitting unit transmits settings for a CSI report, representing settings related to more than 32 antenna ports, i.e., CSI-reference signals (RS resources), and settings related to the number of antenna ports in two dimensions; and... The control unit controls the reception of the CSI report. The CSI report contains one or more indexes representing one or more beams for multiple layers corresponding to the first polarization.

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