Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is provided with: a receiving unit that receives settings for a type 1 multi-panel codebook using channel state information (CSI)-reference signals (RS) of more than 32 ports and ranks of more than 4; and a control unit that controls reporting of a precoding matrix indicator (PMI) based on the type 1 multi-panel codebook according to the setting.

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 advancing 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+, 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] Research is underway on how, in future wireless communication systems (e.g., NR), terminals (User Equipment (UE)) will control transmit and receive processing based on information related to Quasi-Co-Location (QCL), Transmission Configuration Indication (TCI) status, and beam.

[0009] However, if a large number of periodic / semi-persistent channel state information-reference signals (CSI-RS) are set for the management of a large number of beams, there are concerns about reduced resource utilization efficiency and reduced throughput.

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

[0011] Methods for solving problems

[0012] One aspect of the present disclosure relates to a terminal comprising: a receiving unit that receives settings for channel state information (CSI)-reference signals (RS) utilizing more than 32 ports and a type 1 multi-panel codebook with more than 4 ranks; and a control unit that, based on the settings, controls the reporting of precoding matrix indicators (PMIs) based on the type 1 multi-panel codebook.

[0013] Invention Effects

[0014] According to one method disclosed herein, CSI-RS resources can be utilized effectively. Attached Figure Description

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

[0016] Figures 2A-2D This is a diagram illustrating an example of FD-OCC and TD-OCC.

[0017] Figure 3 This is a diagram showing an example of the CSI-RS location for each port number.

[0018] Figure 4 This is a diagram illustrating an example of a 32-port CSI-RS mapping.

[0019] Figure 5A as well as Figure 5B This is a diagram illustrating an example of CSI-RS for applying PRB-inter-OCC.

[0020] Figures 6A-6C This is a diagram representing an example of OCC between PRBs.

[0021] Figure 7A as well as Figure 7B This is a diagram illustrating an example of the overlap between the old and new versions of CSI-RS.

[0022] Figure 8 This diagram illustrates an example of CSI-RS measurement operations for a UE that has not had its PRB-inter-OCC configured.

[0023] Figure 9 This is a diagram illustrating an example of CSI-RS for applying OCC between time slots.

[0024] Figure 10 This is a diagram illustrating an example of existing CSI-RS resources and additional CSI-RS resources.

[0025] Figure 11 This is a diagram illustrating an example of an additional OCC applied across existing CSI-RS resources and additional CSI-RS resources.

[0026] Figure 12 This is a diagram illustrating an example of a situation where there is a difference in at least one time or frequency between existing CSI-RS resources and additional CSI-RS resources.

[0027] Figure 13 This is a diagram illustrating an example of a situation where there is at least one difference in sequence and scrambling ID between existing CSI-RS resources and additional CSI-RS resources.

[0028] Figure 14 This represents an example of timing 1 in beam application.

[0029] Figure 15 This is an example of the timing of CSI-RS resource application.

[0030] Figure 16 This indicates the correlation between the number of supported CSI-RS ports and base station antenna layout in existing specifications for single-panel displays.

[0031] Figure 17 This indicates the correlation between the number of supported CSI-RS ports and base station antenna layout in existing specifications for multi-panel displays.

[0032] Figure 18 This represents an example of the settings involved in option 1 of implementation method C1.

[0033] Figure 19 This represents the first example of the settings involved in option 2 of implementation method C1.

[0034] Figure 20 This represents a second example of the settings involved in option 2 of implementation method C1.

[0035] Figure 21A as well as Figure 21B This represents an example of a base station antenna layout involved in option 2 of implementation method C1.

[0036] Figure 22 This represents the first example of the settings involved in option 3 of implementation method C1.

[0037] Figure 23 This represents a second example of the settings involved in option 3 of implementation method C1.

[0038] Figure 24A as well as Figure 24B This represents an example of a base station antenna layout involved in option 3 of implementation method C1.

[0039] Figure 25 i represents the CSI report used for Layer 2. 1,3 An example of a mapping to k1 and k2.

[0040] Figure 26 i indicates the CSI reporting used for Layer 3 and Layer 4. 1,3 An example of a mapping to k1 and k2.

[0041] Figure 27 This represents an example of a Level 1 CSI report with codebookMode=1.

[0042] Figure 28 This represents an example of a Level 1 CSI report with codebookMode=2 and N2>1.

[0043] Figure 29 This represents an example of a Level 1 CSI report with codebookMode=2 and N2=1.

[0044] Figure 30 This represents an example of a 2-layer CSI report with codebookMode=1.

[0045] Figure 31 This represents an example of a 2-layer CSI report with codebookMode=2 and N2>1.

[0046] Figure 32 This represents an example of a 2-layer CSI report with codebookMode=2 and N2=1.

[0047] Figure 33 This represents an example of a 3-layer CSI report and a codebook with codebookMode=1-2.

[0048] Figure 34 This represents an example of a 5-layer CSI report and a codebook with codebookMode=1-2.

[0049] Figure 35 This represents an example of a 7-layer CSI report and a codebook with codebookMode=1-2.

[0050] Figure 36 This represents an example of an 8-layer CSI report and a codebook with codebookMode=1-2.

[0051] Figure 37 This indicates i for a 64-CSI-RS port. 1,3 An example of a mapping to k1 and k2.

[0052] Figure 38 This indicates i for a 64-CSI-RS port. 1,3 Another example of the mapping to k1 and k2.

[0053] Figure 39 This represents an example of the codebook for rank 1 and codebook mode 2 involved in option 1 of implementation method D2-2.

[0054] Figure 40 This represents an example of the codebook for rank 2 and codebook mode 2 involved in option 1 of implementation method D2-2.

[0055] Figure 41 This represents an example of the codebook for rank 3 and codebook mode 2 involved in option 3 of implementation method D2-2.

[0056] Figure 42 This represents an example of a type 1 multi-panel codebook used for Level 1 CSI reporting and codebook mode 1.

[0057] Figure 43 This represents an example of a type 1 multi-panel codebook used for 2-layer CSI reporting and codebook mode 1.

[0058] Figure 44 This represents an example of a type 1 multi-panel codebook used for 3-layer CSI reporting and codebook mode 1.

[0059] Figure 45 This represents an example of a type 1 multi-panel codebook used for 4-layer CSI reporting and codebook mode 1.

[0060] Figure 46This represents an example of a Type 1 multi-panel codebook used for Level 1 CSI reporting and Codebook Mode 2.

[0061] Figure 47 This represents an example of a type 1 multipanel codebook used for 2-layer CSI reporting and codebook mode 2.

[0062] Figure 48 This represents an example of a Type 1 multi-panel codebook used for 3-layer CSI reporting and codebook mode 2.

[0063] Figure 49 This represents an example of a Type 1 multi-panel codebook used for 4-layer CSI reporting and codebook mode 2.

[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] (TCI, Spatial Relations, QCL)

[0070] The following is being studied in NR: Based on the Transmission Configuration Indication state (TCI state), the reception processing (e.g., at least one of receiving, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmitting, mapping, precoding, modulation, and encoding) of at least one of the control signals and channels (referred to as signal / channel) in the UE.

[0071] TCI states can also represent the TCI states of signals / channels applied to the downlink. The equivalent TCI states of signals / channels applied to the uplink can also be described as spatial relations.

[0072] TCI status refers to information related to the quasi-co-location (QCL) of a signal / channel, and can also be referred to as spatial reception parameters, spatial relation information, etc. TCI status can also be set for the UE on a per-channel or per-signal basis.

[0073] QCL is an indicator that represents the statistical properties of a signal / channel. For example, if a signal / channel has a QCL relationship with other signals / channels, it can also mean that it can be assumed that at least one of the following parameters (Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter, e.g., spatial Rx parameter) is the same across these different signals / channels (with regard to at least one of them being the QCL).

[0074] Additionally, the spatial reception parameters may also correspond to the UE's receive beam (e.g., receive analog beam), and the beam may also be determined based on the spatial QCL. The QCL (or at least one element of the QCL) in this disclosure may also be replaced with sQCL (spatial QCL).

[0075] QCLs can also specify multiple types (QCL types). For example, four different QCL types (ADs) can be set that can be assumed to have the same parameters (or parameter sets).

[0076] The assumption that a UE envisions a specific QCL (e.g., QCL type D) relationship between a certain Control Resource Set (CORESET), channel, or reference signal and other CORESETs, channels, or reference signals can also be referred to as a QCL assumption.

[0077] The UE can also determine at least one of the transmit beam (Tx beam) and receive beam (Rx beam) of the signal / channel based on the TCI state or QCL assumption of the signal / channel.

[0078] TCI status can also be, for example, information related to the QCL of the target channel (in other words, the reference signal (RS) used by the channel) and other signals (e.g., other RS). TCI status can also be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

[0079] Physical layer signaling can also be, for example, downlink control information (Downlink Control Information (DCI)).

[0080] The channel that is set (specified) to TCI state or spatial relationship can be, for example, at least one of the following: downlink shared channel (Physical Downlink Shared Channel (PDSCH))), downlink control channel (Physical Downlink Control Channel (PDCCH))), uplink shared channel (Physical Uplink Shared Channel (PUSCH))), and uplink control channel (Physical Uplink Control Channel (PUCCH))).

[0081] Furthermore, the RS that is related to the channel as QCL can be at least one of the following: a Synchronization Signal Block (SSB), a Channel State Information Reference Signal (CSI-RS), a Measurement Reference Signal (Sounding Reference Signal (SRS)), a Tracking CSI-RS (also known as a Tracking Reference Signal (TRS)), or a QCL Detection Reference Signal (also known as a QRS).

[0082] An SSB is a block of signals that contains at least one Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and broadcast channel (Physical Broadcast Channel (PBCH)). An SSB can also be referred to as an SS / PBCH block.

[0083] The RS of QCL type X in TCI state can also refer to the RS that is in a relationship of QCL type X with a certain channel / signal (DMRS), and this RS can also be called the QCL source of QCL type X in TCI state.

[0084] In this disclosure, the TCI state, the indicated TCI state, the unified TCI state, the TCI state applied in a channel / signal configured to follow the unified TCI state, the TCI state applied in the UE-specific PDSCH and the CORESET / PDCCH associated with the USS, and the TCI state applied to the PUCCH and PUSCH can also be overridden with each other.

[0085] (CSI report (or reporting))

[0086] In Rel.15 NR, a terminal (also known as a user terminal, user equipment (UE), etc.) generates (also known as deciding, calculating, estimating, measuring, etc.) Channel State Information (CSI) based on a Reference Signal (RS) (or the resources used by that RS), and sends (also known as reporting, feedback, etc.) the generated CSI to the network (e.g., a base station). This CSI may also be sent to the base station using, for example, an uplink control channel (e.g., a Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (e.g., a Physical Uplink Shared Channel (PUSCH)).

[0087] The RS used for generating 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), etc.

[0088] CSI-RS may 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 may also be referred to as an SS block (SSB), etc. Furthermore, SS may also include at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).

[0089] 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).

[0090] The UE can also receive information related to CSI reports (report configuration information) and control CSI reporting based on this information. This report configuration information can be, for example, the "CSI-ReportConfig" of the Radio Resource Control (RRC) Information Element (IE). Furthermore, in this disclosure, the RRC IE can be inter-modified with RRC parameters, higher-layer parameters, etc.

[0091] The report configuration information (e.g., “CSI-ReportConfig” in RRC IE) may also include at least one of the following.

[0092] • Information related to the type of CSI report (report type information, such as "reportConfigType" in RRC IE)

[0093] • Information related to more than one quantity of CSI that should be reported (more than one CSI parameter) (report quantity information, e.g., "reportQuantity" in RRC IE)

[0094] • Information related to the resources used to generate the RS (the CSI parameter) (resource information, such as RRCIE's "CSI-ResourceConfigId")

[0095] • Information related to the frequency domain of the object being reported by CSI (frequency domain information, such as RRC IE's "reportFreqConfiguration")

[0096] 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.

[0097] 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.).

[0098] 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, as well as a CSI-IM resource (e.g., a zero power CSI-RS resource).

[0099] Furthermore, frequency domain information can also represent the frequency granularity of CSI reports. This frequency granularity can, for example, include bandwidth and subbands. Bandwidth is the entire CSI reporting band. Bandwidth can be, for example, 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 rewritten as CSI reporting band, entire CSI reporting band, etc.

[0100] 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).

[0101] Frequency domain information can also indicate which PMI is being reported, wideband or subband (frequency domain information may also include, for example, a "pmi-FormatIndicator" for 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.

[0102] When a wideband PMI report is set (determined), a wideband PMI can 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.

[0103] 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.

[0104] PMI can also represent a precoder matrix (also simply called a 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 a codebook).

[0105] In the space domain, a CSI report can also contain more than one type of CSI. For example, the CSI can 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 can also be rewritten as a single layer, and multi-beam can be rewritten 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.

[0106] 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 may be specified for each (Type 1 single-panel codebook, Type 1 multi-panel codebook).

[0107] 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.

[0108] The uplink control information (UCI) type may also include at least one of the following: Hybrid Automatic Repeat reQuest ACK knowledgement (HARQ-ACK), scheduling request (SR), and CSI. UCI can be carried via either PUCCH or PUSCH.

[0109] In Rel.15 NR, UCI can include a CSI part for broadband PMI feedback. CSI report #n includes PMI broadband information when reported.

[0110] 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 separately.

[0111] 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 configuration (CSI-ReportConfig) includes resource settings for channel measurement (resourcesForChannelMeasurement), CSI-IM resource settings for interference (csi-IM-ResourceForInterference), NZP-CSI-RS settings for interference (nzp-CSI-RS-ResourceForInterference), and report quantity, etc. Each of the channel measurement resource settings, CSI-IM resource settings for interference, and NZP-CSI-RS settings for interference is associated with a CSI resource setting (CSI-ResourceConfig, CSI-ResourceConfigId). 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).

[0112] In order to achieve further dynamic channel / interference assumptions (hypotheses) 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.

[0113] (Codebook settings)

[0114] 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.

[0115] 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.

[0116] The codebook parameters include parameters related to the codebook subset restriction (CBSR) ("...Restriction" within CodebookConfig). The CBSR setting indicates which PMI reporting bits ("1") are allowed and which PMI reporting bits ("0") are not allowed for the precoder associated with the CBSR bits. One bit of the CBSR bitmap corresponds to one codebook index / antenna port.

[0117] (CSI report settings)

[0118] In Rel.16, the CSI report configuration (CSI-ReportConfig) includes, in addition to the codebook configuration (CodebookConfig), CSI-RS resources for channel measurement (resourcesForChannelMeasurement(CMR)) and CSI-RS resources for interference measurement (csi-IM-ResourcesForInterference(ZP-IMR), nzp-CSI-RS-ResourcesForInterference(NZP-IMR)). Parameters in CSI-ReportConfig other than codebookConfig-r16 are also included in the Rel.15 CSI report configuration.

[0119] In Rel. 17, an enhanced CSI report configuration (CSI-ReportConfig) for CSI measurements / reporting of multi-TRPs 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 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.

[0120] For CSI reports associated with NCJT measurements of multiple TRPs / panels that are set up through a single CSI report setting, support for at least one of the following options 1 and 2 is being investigated.

[0121] <Option 1>

[0122] 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.

[0123] <Option 2>

[0124] The UE can also be configured to report a CSI associated with the best measurement result in relation to NCJT and single TRP measurement assumptions.

[0125] As described above, in Rel. 15 / 16, the CBSR is set for each codebook setting within each CSI report setting. That is, the CBSR is applied to all CMRs, etc., within the corresponding CSI report setting.

[0126] 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.

[0127] Option 1 (X=0): Measurement of CSI for NCJT only.

[0128] Option 1 (X=1): Measurement of CSI for NCJT and CSI for a single TRP (one TRP).

[0129] Option 1 (X=2): Measurement of CSI for NCJT and CSI for a single TRP (two TRPs).

[0130] Option 2: Measurement of both NCJT CSI and single TRP CSI.

[0131] Multiple subbands for CSI report #n, provided by the high-level parameter csi-ReportingBand, can also include the lowest subband of csi-ReportingBand as subband 0, and are assigned numbers sequentially in ascending order.

[0132] (PMI / Type 1 Codebook)

[0133] For base station panels, Type 1 single-panel codebooks and Type 1 multi-panel codebooks 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 The value is 2N1N2. In a Type 1 multi-panel setup, the number of CSI-RS antenna ports P is... CSI-RS and (N) gThe antenna model (logically defined) is defined by N1, N2, etc., which represents the antenna port array of the CSI antenna.

[0134] -Type 1 Single-panel codebook

[0135] 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 ].

[0136] For P CSI-RS The specification defines the supported settings (combinations of values) for (N1, N2) and (O1, O2). (N1, N2) represents the number of two-dimensional (2D) antenna elements, which is 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) is the 2D oversampling factor.

[0137] 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) For P CSI-RS The precoding matrix for <16 and v=3,4 is represented as W. l,l',m,m',n (v) For 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''' according to i 1,1 And k1 is determined by. M, m', m'', m''' are determined by i 1,2 And k2 is determined by. N is determined by i2. p is determined by P. CSI-RS The first half of the (≥16) ports are 0, and the second half are 1.

[0138] The precoding matrix W can be represented as the product of two matrices W1W2. W1 represents the wideband and long-term channel properties, indicated by the codebook index i1 (e.g., i...). 1,1 and i 1,2 W1 is represented by the following formula using matrix B. W2 represents the frequency selectivity (subband) and short-term channel characteristics, represented by codebook index i2.

[0139]

[0140] B represents L 2D DFT beams, each of which is oversampled through (O1, O2).

[0141] φ for the precoding matrix n θ p u m v l,m v ~ l,m It is given by the following formula.

[0142]

[0143] For a Level 1 CSI report and a codebook mode of 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) Provided in the following formula.

[0144]

[0145] Here, [i 1,1 i 1,2[i2]=[l,m,n]. v l,m It is an N1-row, N2-column DFT vector (spatial domain (SD) vector, 2D-DFT vector, SD DFT vector, SD basis vector, SD beam), provided as exp(j2πln1 / O1N1)×exp(j2πmn2 / O2N2), n1=0,1,...,N1-1, n2=0,1,...,N2-1, and provided as v and l to determine. l,m This represents a beam. The phase difference (co-phasing, phase compensation between polarizations) φ between two polarizations (first polarization and second polarization, horizontal polarization and vertical polarization). 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, which is opposite to the phase of the first half of the port.

[0146] - Type 1 Multi-panel codebook

[0147] 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, when compared to a Type 1 Single-Panel codebook, in addition to N1 and N2, the number of panels N is also set. g If compared with a Type 1 single-panel codebook, then as (wideband) inter-panel co-phasing (inter-panel phase matching, inter-panel phase compensation, phase compensation between panels), an additional report is added. 1,4 For each panel, select the same SD beam (DFT vector v). l,m , SD base index l, m), only add the phase difference between report panels.

[0148] 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} represents the horizontal components of the oversampled SD basis.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.

[0149] For a type 1 multi-panel codebook, the antenna setting parameters are ng-n1-n2(N g (N1, N2). In the existing specification, it supports up to rank 4, but does not support rank 5 and above.

[0150] Each PMI value corresponds to a codebook index i1, 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 ].

[0151] When the codebook mode is 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. These two values ​​represent the broadband phase difference between the second panel (panel 1) and the first panel (panel 0) in the corresponding 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).

[0152] When the codebook mode is set to 2, i2 = [i 2,0 i 2,1 i 2,2The quantity and value of i2 are associated with the codebook pattern 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 pattern 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 pattern 2 (N... g In (=2), the phase difference of the sub-band has three values, representing the phase difference between polarizations and between panels.

[0153] For codebook mode 2, more phase difference is reported for more accurate CSI, thus incurring greater feedback overhead. Furthermore, codebook mode 2 only applies to N. g =2 and is supported.

[0154] 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, accompanied by additional phase differences between the panels.

[0155] φ for the precoding matrix n a p b p u m v l,m Provided by the following formula.

[0156]

[0157] Use antenna port 3000 to 2999+P CSI-RS The precoding matrix used in the v-layer CSI report is W (v) This indicates that for the i-th layer and the number of panels N... g The precoding matrix of codebook pattern X is composed of W l,m,p,n i,N_g,X Indicates. [i 1,1 i 1,2 i 1,4 ,i2]=[l,m,p,n].

[0158] For codebook patterns 1 and N g ={2,4}, the precoding matrix W used for Level 1 CSI reporting. l,m,p,n (1) By W l,m,p,n 1,N_g,1 This indicates that for codebook patterns 1 and N... g ={2,4}, the precoding matrix W used for Level 2 CSI reporting. l,l',m,m',p,n (2) From (1 / sqrt(2))[W l,m,p,n (1,N_g,1) Wl',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 () is provided by the following formula.

[0159]

[0160] Here, φ n =e jπn / 2 For N g =2, p=p1, for N g =4, p=[p1,p2,p3]. φ p_1 φ p_2 φ 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 φ p_1 This represents the phase difference between the second panel and the first panel. φ p_2 This represents the phase difference between the third panel and the first panel. φ p_3 This indicates the phase difference between the fourth panel and the first panel.

[0161] For codebook patterns 2 and N g =2, the precoding matrix W used for Level 1 CSI reports. l,m,p,n (1) By W l,m,p,n 1,2,1 This indicates that for codebook mode 2 and N... g =2, the precoding matrix W used for Layer 2 CSI reporting. l,l',m,m',p,n (2) From (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,n1,2,2 and W l,m,p,n 2,2,2 It is given by the following formula.

[0162]

[0163] 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. φ n_0 Each sub-band represents the phase difference between the second polarization of the first panel and the first polarization of the first panel. n_1 Each sub-band represents the phase difference between the first polarization of the second panel and the first polarization of the first panel. n_2 Each sub-band represents the phase difference between the second polarization of the second panel and the first polarization of the first panel.

[0164] (PMI / Type 2 Codebook)

[0165] -Type 2 codebook

[0166] For Rel. 15 Type 2 CSI (Type 2 Codebook), the UE is set to the higher-level parameter codebookType as "typeII".

[0167] In this disclosure, a matrix Z with X rows and Y columns is sometimes represented as Z(X×Y).

[0168] Regarding Type 2 CSI of Rel.15, for a given layer l, the precoding matrix for each subband (SB-wise) is based on the following formula.

[0169] W l (N t ×N3) = W1W 2,l (F1)

[0170] N t N is the number of antennas / antenna ports. N3 is the total number (subbands) of precoding (beamforming) matrices (precoders) represented by PMI.

[0171] 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 .

[0172] W 2,l (2L×N3) is a matrix (LC coefficient matrix) consisting of the linear combination (LC) coefficients, subband complex LC coefficients, and combination coefficients for layer l. 2,l This represents the beam selection and the phase difference (co-phasing, phase matching) between the two polarizations. For example, with L=2 SD beams b i b j The corresponding LC coefficients are 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 And is approximated. The overhead of the feedback is mainly composed of the LC coefficient matrix W. 2,l This is caused by... Furthermore, Rel.15 type 2 CSI only supports rank 1 and 2.

[0173] In Type 2 CSI, a channel (channel matrix) for a given user is represented by a linear coupling of two polarizations and L SD beams. Type 2 CSI of Rel.15 supports rank 1 and rank 2.

[0174] -Enhanced Type 2 Codebook (Rel.16)

[0175] For Rel.16 Type 2 CSI (enhanced Type 2 codebook), the UE is set to the higher-level parameter codebookType as "typeII-r16".

[0176] Type 2 CSI in Rel.16 reduces the frequency domain (FD) compression and the LC coefficient matrix W. 2,l Associated overhead. In addition to rank 1 and 2, Rel.16 type 2 CSI also supports rank 3 and 4.

[0177] In Type 2 CSI of Rel.16, for the provided precoding matrix W of layer l l It is expressed by the following formula.

[0178] W l = W1W ~ l W f,l H (F2)

[0179] Rel.15 Type 2 CSI W 2,l Through W ~ l W f,l H And approximated. 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 is ​​given by W. f,l The conjugate transpose is obtained.

[0180] For CSI reporting, the UE can also be set to 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 by RRC IE (numberOfPMI-SubbandsPerCQI-Subband). For R, the total number N3 of the precoding matrices represented by PMI is controlled as a function of the number of subbands set within the csi-ReportingBand, the subband size set by subbandSize, and the total number of PRBs within the BWP.

[0181] W1(Nt×2L) represents 2L DFT vectors. To represent this matrix, we report multiple indices of the SD basis and a 2-dimensional over-sampling factor.

[0182] W ~ l (2L×M v This 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 quantized NZCs.

[0183] W f,l (N3×M v) is for M of layer l v DFT vectors (frequency domain (FD) DFT vectors, FD basis vectors, FD beams) for layer l, representing the selected frequency domain basis. Each DFT vector uses N3 FD bases (sub-bands). N3, as a function of the number of sub-bands set within csi-ReportingBand, is the total number (number of sub-bands) of the precoding (beamforming) matrix (precoder) represented by PMI. csi-ReportingBand represents the continuous or discontinuous sub-bands within the BWP when CSI for a certain BWP is reported. Each layer has M v FD DFT vectors. When N3 > 19, M v FD DFT vectors (FD bases) are selected from an intermediate subset (InS) of size N3' (< N3). When N3 ≤ 19, log2(C(N3 - 1, M v - 1)) bits are reported. Here, C(N3 - 1, M v - 1) represents the number of combinations (combinatorial coefficient C(x, y)) of selecting M v - 1 from N3 - 1, and is also referred to as binomial coefficients.

[0184] The frequency domain response / distribution (frequency response) represented by the linear combination of FD DFT vectors and LC coefficients can also be referred to as an FD beam. The FD beam can also correspond to the delay distribution (time response).

[0185] The PMI sub-band size is provided by CQI sub-band size / R, where R ∈ {1, 2}. The number M v of FD DFT vectors for the provided rank v is provided by ceil(p v × N3 / R). The number M v of FD DFT vectors is the same for all layers l ∈ {1, 2, 3, 4}. p v is set by the higher layer.

[0186] The multiple precoding matrices represented by PMI are determined by L + M v vectors.

[0187] For the L SD beams (SD DFT vectors) v for beam indices i = 0, 1,..., L - 1 m_1^(i),m_2^(i) are identified by q1, q2, n1, n2 and represented by i 1,1 、i 1,2 .

[0188] Mv The FD DFT vectors are 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) Identification of ∈{0,1,...,N3-1}.

[0189] In the FD DFT vector, the indices t=0,1,...,N3-1 of the FD basis (subband) and the elements (FD basis) of layers l=1,...,v are y. t,l (f) =exp(j2πtn 3,l (f) / N3). In M v In a set of FD DFT vectors, for the indices f=0,1,...,M of the FD DFT vectors... v The FD DFT vector of -1 is [y 0,l (f) ,y 1,l (f) ,...,y N_3-1,l (f) ] T .

[0190] W 2,l Each row represents the channel frequency response of a specific SD beam. When the SD beam has high directivity, the channel tap of each beam is limited (in the time domain, the power delay distribution becomes sparse). As a result, the channel frequency response of each SD beam has high correlation (approximately flat in the frequency domain). In this case, the channel frequency response can be approximated by linear coupling of a relatively small number of FD DFT vectors. For example, in M... v When =2, use FD DFT vectors f2 and f q and LC coefficient d1 0 d2 0 The frequency response associated with SD beam b0 is via d1 0 f2+,d2 0 f q Approximated.

[0191] Choose the dominant M v FD DFT vectors. Let M be the number of vectors. v < <N3,W ~ l Expenses and W2,l The cost is relatively small. v All or part 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 The number of NZCs K across all layers NZ ≤2K0=ceil(β×2LM v ). β is set by higher-level settings.

[0192] In the enhanced type 2 codebook of Rel.16, L, β, p v The value of (codebook parameter combination, parameter combination) is determined by the higher-level parameter paramCombination-r16 (codebook combination setting).

[0193] 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 the base station does not know). 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 identifies the size of CSI Part 2.

[0194] In the Type 2 Enhancement CSI feedback in Rel. 16, CSI Part 1 (if reported) contains RI, CQI, and an indicator of the total number of non-zero amplitude coefficients across multiple layers for Type 2 Enhancement CSI. The RI, CQI, and the indicator of the total number of non-zero amplitude coefficients across multiple layers, as fields of Part 1, are encoded separately. CSI Part 2 contains the PMI for Type 2 Enhancement CSI. 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 FD substrate selected for each layer, the NZC (amplitude and phase) of each layer, the strongest coefficient indicator (SCI) of each layer, and at least one of the amplitudes of the strongest coefficient of each layer / polarization.

[0195] Multiple PMI indices (PMI values, codebook indices) associated with different CSI Part 2 information can also follow the following for the l-th layer.

[0196] ·i 1,1 : Rotation factors [q1 q2] in 2D oversampling. q1∈{0,1,...,O1-1}, q2∈{0,1,...,O2-1}.

[0197] ·i 1,2 : Multiple indices of the SD substrate corresponding to each SD beam. 1,2 ∈{0,1,...,C(N1N2,L)-1}.

[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. When 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 are identified and reported as i. 2,4,l and i 2,5,l Which coefficient within? 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) ).

[0202] ·i 2,3,l: Amplitude coefficient indicator of (both polarizations) of the (broadband) coefficient of the l-th layer. i 2,3,l = [k l,0 (1) k l,1 (1) .

[0203] ·i 2,4,l : Amplitude coefficient indicator of the reported (sub-band) coefficient of the l-th layer. i 2,4,l = [k l,0 (2) ... k l,M_v-1 (2) .

[0204] ·i 2,5,l : Phase coefficient indicator of the reported (sub-band) coefficient of the l-th layer. i 2,5,l = [c l,0,f ... c l,M_v-1,f .

[0205] Let ∈ {0, 1,..., M v - 1} be the index of i 2,4,l , and let ∈ {0, 1,..., 2L - 1} be the index of k l,f_l^ (2) . This and identify the strongest coefficients for layers l = 1,..., v, i.e., the elements of i 2,4,l for layer l​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​-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. Through this 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. Through this 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 by the UE (using 4 bits). All phase coefficients are quantized using 16-PSK. The quantity φ used for phase difference. l,i,f = exp(j2πc l,i,fThe 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] Amplitude coefficient indicator element corresponding to the strongest coefficient of layer l Amplitude coefficient indicator element Phase coefficient indicator element For l=1,...,v, , , It will not be reported.

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

[0213] From 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) It is based on the precoding matrix W for layer l (=1 to v). l Precoding matrix W l It is expressed by the following formula.

[0214]

[0215] Here, the 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. p l,i,f (2) This represents the sub-band amplitude coefficient. φ 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) based on 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 The reported elements are associated with specific priority rules. 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 coupled 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 through the linear coupling of these 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 uses K CSI-RS ports that have been beamformed with consideration of the SD beam to transmit CSI-RS. The UE selects / identifies the optimal L (≤K) CSI-RS ports per polarity and reports their indices in W1. Type 2 PS CSI of Rel.15 supports rank 1 and 2.

[0224] -Enhanced Type 2 Port Selection Codebook (Rel.16)

[0225] For Rel.16 Type 2 PS CSI (enhanced Type 2 PS codebook), the UE is set to the higher-level parameter codebookType of “typeII-PortSelection-r16”.

[0226] The operation of Type 2 PS CSI in Rel.16 is the same as Type 2 CSI in Rel.16, except for the selection of the SD beam. Type 2 PS CSI in Rel.15 supports ranks 1 to 4.

[0227] For layer l∈{1,2,3,4}, the precoding matrix W generated by the precoder for each subband (SB)-wise is... l It is expressed by the following formula.

[0228] W l (N t ×N3) = QW1W ~ l W f,l H (H1)

[0229] 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 composed of M vectors (FD basis vectors), each vector containing N³ FD basis vectors. K is set by a higher level. L is set by a higher level. PCSI-RS ∈{4,8,12,16,24,32}. In P CSI-RS In the case of >4, L∈{2,3,4}.

[0230] In Type 2 PS CSI of Rel.15 / 16, each CSI-RS port #i is associated with the SD beam b. i .

[0231] Regarding Type 2 PS CSI of Rel.16, similarly to Type 2 CSI of Rel.16, the number of FD substrates is reduced from N3 to M. v (M v (N3), thus reducing overhead compared to Type 2 PS CSI of Rel.15.

[0232] -Added enhanced type 2 port selection codebook (Rel.17)

[0233] For Rel.17 Type 2 PS CSI / codebook (further enhanced Type 2 PS codebook), the UE is set to the higher-level parameter codebookType of “typeII-PortSelection-r17”.

[0234] In Type 2 PS CSI of Rel.17, for each CSI-RS port #i, instead of the SD beam, it is paired with the SD-FD beam (SD beam b). i and FD beam f i,j The pairs (j being the frequency index) are associated. In this example, ports 3 and 4 are associated with the same SD beam and different FD beams.

[0235] 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 to a lower level than that observed in the UE based on the SD beam.

[0236] The primary scenario for Type 2 PS codebooks in Rel.17 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 CSI reports, SRS measurements in the base station are used, allowing the base station to obtain CSI for determining the DL MIMO precoder. In this case, to reduce CSI overhead, several CSI reports can be omitted.

[0237] The parameter combinations L, β, and p used in the Rel.16 type 2 codebook v In the diagram, L represents the number of SD beams. v It is used to calculate the number M of FD basis vectors for rank v. v =ceil(p v The parameter is (×N3 / R). β is the parameter used to calculate the maximum number of NZCs.

[0238] In the Rel.17 Additional Enhancement Type 2 PS 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 Rel.17 Additional Enhancement Type 2 PS codebook, α is used to calculate the number of selected CSI-RS ports within the PS codebook, K1=αP. CSI-RS The parameters are as follows: M is the number of FD basis vectors. β is the parameter used to calculate the maximum number of NZCs. The precoding matrix represented by PMI is determined by L+M vectors. Here, L=K1 / 2, K1=αP CSI-RS .

[0239] In Rel.17's additional enhancement type 2 PS CSI, each CSI-RS port uses SD and FD beamforming. Each port is associated with an SD-FD beam pair.

[0240] For the provided precoding matrix W of layer l l It is expressed by the following formula.

[0241] W l (K×N3) = W1W ~ l W f,l H (H2)

[0242] 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.

[0243] W ~ l (2L×M v The report is a matrix composed of coupling coefficients (subband complex LC coefficients). The maximum number of NZCs reported is K0. The report consists of two parts: a bitmap representing the NZC positions and quantized NZCs.

[0244] In Rel.17's additional enhancement type 2 PS CSI, 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. When v≤2 and K NZ In the case of =K1Mv, the i corresponding to layer l=1,...,v is not reported. 1,7,l (For the bitmap indicator of the l-th layer). That is, if the total number of reported NZCs is equal to the maximum number of K1Mv and v≤2, the reporting of the bitmap indicating the location of the NZCs is omitted. In addition, in Rel.16, the bitmap of the NZC location is always reported.

[0245] W f,l (N3×M v ) is based on 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 Disable (off), and do not report additional FD basis vectors. In M v When W = 2 f,l Enable (on), report M v An additional FD basis vector. In M vWhen =2, the window size N∈{2,4} of the FD basis is set by the higher-level parameter (valueOfN). Additionally, in Rel.16, W is always reported. f,l .

[0246] (JT)

[0247] Joint transmission (JT) can also refer to the simultaneous transmission of data from multiple points (e.g., TRPs) to a single UE.

[0248] Rel.17 supports non-coherent joint transmission (NCJT) from two TRPs. PDSCH from the two TRPs can be precoded and decoded independently. Frequency resources can be non-overlapping, partially overlapping, or fully overlapping. In cases of overlap, PDSCH from one TRP interferes with PDSCH from the other TRPs.

[0249] In Rel.18, coherent joint transmission (CJT, mTRP CJT) supporting up to four TRPs is under investigation. Data from the four TRPs can also be coherently precoded and transmitted to the UE on the same time-frequency resources. For example, channels from four TRPs can be considered, using the same precoding matrix. "Coherent" can also mean a certain relationship between the phases of multiple received signals. 4TRP joint precoding can also be used to improve signal quality without interference between the four TRPs. Data can also be affected only by interference from sources outside the four TRPs.

[0250] (NCJT CSI)

[0251] 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, two CMR groups accompanying each channel measurement resource (CMR) from a TRP can be configured within a single CSI-ReportConfig. A CSI reporting mode can be set from both modes.

[0252] 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).

[0253] Accompanied by K s Two CMR groups of K1+K2 CMRs are assigned to the UE. 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. N max =2 support is an optional feature of the UE. K S,max =X support 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.

[0254] The bitmap based on RRC signaling indicates the N (N=1,2) CMR pairs actually used for NCJT measurement by indicating 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.

[0255] The UE selects one or more CSIs to report based on the mode (CSI reporting mode) set by csi-ReportMode. csi-ReportMode indicates two modes (NCJT CSI modes) below, mode 1 and mode 2.

[0256] -Mode 1

[0257] The UE can also be configured to report X CSIs associated with a single TRP measurement premise (hypothesis) and one CSI associated with an NCJT measurement premise. X = 0, 1, 2. In the case of X = 2, the two CSIs are associated with two different single TRP measurement premises accompanied by multiple CMRs from different multiple CMR groups. Support for X = 1, 2 is an optional feature for UEs that support option 1.

[0258] -Mode 2

[0259] The UE can also be configured to report a CSI that is best associated with the NCJT and the single TRP measurement premise.

[0260] In Mode 1, the UE report contains X (X=0,1,2) single TRP CSIs and one NCJT CSI, for a total of X+1 CSIs. In Mode 2, the UE report is the best CSI (one CSI) from all single TRP CSIs and one NCJT CSI.

[0261] A single CSI report can report up to two single TRP CSIs and one NCJT CSI (with Mode 1, X=2). 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 existing CSIs, including one CRI, one RI / PMI / LI, and one or two CQIs (for levels 8 and below, one CQI for each CW).

[0262] For the following scenarios, a new mapping order (table) is defined for multiple fields within a CSI report.

[0263] • 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.

[0264] • The mapping order of CSI part 1 for modes 1 and 2.

[0265] • The mapping order of the CSI part 2 broadband for modes 1 and 2.

[0266] • The mapping order of the CSI part 2 subbands for modes 1 and 2.

[0267] (CJT CSI)

[0268] In the ideal scenario (where four TRPs are co-located and considered to be in 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 sometimes differ significantly. The joint precoding matrix V based on the constant module codebook is not accurate. In this case, the feedback for each TRP, as well as the inter-TRP coefficients, can be matched using the current Type 2 codebook of the NR.

[0269] For a CJT with a maximum of four TRPs in FR1, the selection of these four TRPs can also be semi-static. Therefore, the selection and the setting of the four CMRs (four CSI-RS resources) used for channel measurements can also be semi-static. It is also possible to dynamically indicate the four TRPs from a list of CSI-RS resources, but this is less likely.

[0270] The path loss from the four TRPs to the UE is different. Therefore, it is difficult to report only one converged CSI representing the joint channel matrix.

[0271] Considering the rollback operation to NCJT (i.e., single TRP), we also consider the CSI of each TRP (i.e., single TRP CSI like NCJTCSI in Rel.17).

[0272] Envisioning an ideal backhaul, synchronization, and the same number of antenna ports across multiple TRPs, CSI acquisition for coherent joint transmission (CJT) targeting FR1 and up to four TRPs is under investigation. For CJT multi-TRP targeting FDD, improvements to the enhanced (Rel.16) Type 2 codebook and the additional enhanced (Rel.17) Type 2 PS codebook are being investigated.

[0273] For each TRP, W1 (the matrix representing the SD DFT vector) / W f The matrix representing the FD DFT vectors can be either the same or different. W for each TRP l (NZC) can also be different. W1 / W for each TRP f / W l Both options can be selected together, or each option can be selected individually. For W1 / W... f / W l The design is preferably accompanied by different scenarios depending on the options. φ It can be reported as a standalone piece of content, or it can be included in W. l The guidelines used are reported internally. These guidelines are related to the configuration scenario (e.g., intra-site multiple TRPs or inter-site multiple TRPs).

[0274] For example, the precoding matrix used for 4-TRP CJT CSI (codebook) can also be derived from W1 / W for each TRP. f / W lThis indicates that W1 for each TRP can be the same or different, and can be selected jointly or individually. Wl for each TRP can also be different, and can be selected jointly or individually. For each TRP, W... f They can be the same or different; they can be chosen together or individually.

[0275] In the (Rel. 18) type 2 codebook (codebook structure) used for CJT multi-TRP (mTRP), at least one of the following modes (CJT codebook mode, CJT CSI mode) can also be supported.

[0276] - Mode 1 is the basis selection of SD / FD for each TRP / TRP group. This allows for independent FD basis selection across N TRPs / TRP groups. For example, its codebook structure is provided by the following formula. Here, N is the number of TRPs or TRP groups.

[0277]

[0278] - Mode 2 is the SD base selection for each TRP / TRP group (port group or resource) and the joint / common FD base selection (across N TRP / TRP groups). For example, its codebook structure is provided by the following formula. Here, N is the number of TRPs or TRP groups.

[0279]

[0280] In both modes, detailed designs such as parameter combinations, substrate selection, TRP (group) selection, reference amplitude, and W2 quantization method can also be applied.

[0281] For Rel.18 CJT using Type 2 CSI (enhanced Type II codebook for CJT), the UE can also be set to the higher-level parameter codebookType as "typeII-CJT-r18". For Rel.18 CJT using Type 2 PS CSI (furtherenhanced Type II port selection codebook for CJT), the UE can also be set to the higher-level parameter codebookType as "typeII-CJT-PortSelection-r18".

[0282] (Doppler CSI)

[0283] 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, research is being conducted on improving the Enhanced (Rel.16) Type 2 codebook and the Additional Enhanced (Rel.17) Type 2 PS codebook without altering the spatial and frequency domain bases; UE reporting will be based on time-domain channel properties (TDCP, time domain correlation profile) measured by tracking RS (TRS).

[0284] Channel coherence time (CCT) depends on the maximum Doppler offset. Channel coherence time is the time during which the measured channel characteristics are usable, or the time until the measured channel characteristics are no longer usable (channel aging). The maximum Doppler offset is estimated using the relative velocity between the transmitter and receiver. Channel coherence time T c Through 1 / Δf max It is approximated. 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.

[0285] TRS is supported to track Doppler shifts. However, TRS has the following issues.

[0286] • Each CSI-RS resource set is limited to only one port. Each CSI-RS resource uses a single port.

[0287] • The settable period is 10ms or more.

[0288] • CSI reporting for TRS is not planned. There are no reporting settings for P-TRS. While reporting can be configured, the report quantity can only be set to "none". Each CSI-RS resource set can use a maximum of 16 CSI-RS resources.

[0289] TRS are configured in resources in both the time and frequency domains. To measure the effects of Doppler shift, multiple RSs in the time domain are required within a specific frequency domain resource.

[0290] In measuring the effects of Doppler shift, CMR is considered. However, the RS used for the measurement depends on the UE implementation.

[0291] Information related to Doppler offset is not supported in the quantities reported by CSI. The 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.

[0292] 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.

[0293] The CSI-RS measurement window and CSI reporting window are under investigation. Within the CSI-RS measurement window, more than one CSI-RS event can be measured. Reported CSI events can also be associated with the CSI reporting window.

[0294] Alternatively, it can be envisioned as a CSI report within time slot n, where the length of the Doppler (DD) / Time (TD) basis vectors (DFT basis vectors) (the number of DD / TD basis vectors) is 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 meas It can also be the measurement window length (number of time slots). 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 .

[0295] CSI reporting window duration (W) CSI =dN4. d and N4 are determined by the CMR settings. The starting point of the CSI report window is time slot l. Alternatively, l = (nN) CSI,ref It can also be l=(n+δ). δ can be either {0,2} or {0,1,2}.

[0296] A d-slot can also be a duration in units of DD.

[0297] Assuming UE-side prediction, the UE can predict the CSI / channel after slot 1. The location of slot 1 is set by the base station via higher-layer signaling (from multiple candidate values). The multiple candidates for the location of slot 1 include existing CSI reference resource locations (nN). CSI,ref (n+δ). Here, δ>0. Existing CSI reference resources in the current operation, i.e. (nN) CSI,ref The location is reused / followed to indicate the last CSI-RS timing for CSI reporting.

[0298] Regarding the parameter δ, the value 2 can be appended.

[0299] N4 is set by the base station via higher-layer signaling.

[0300] In N4=1, the DD basis can also be identical (identity, identity). DD compression may also not exist. In this case, the codebook structure could be, for example, the following formula.

[0301]

[0302] In 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 could also be, for example, the following formula.

[0303]

[0304] 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.

[0305] For Rel.18 PMI prediction using Type 2 CSI (enhanced Type II codebook for predicted PMI), the UE can also be set to the higher-level parameter codebookType of "typeII-Doppler-r18". For Rel.18 PMI prediction using Type 2 PS CSI (further enhanced Type II port selection codebook for predicted PMI), the UE can also be set to the higher-level parameter codebookType of "typeII-Doppler-PortSelection-r18".

[0306] (CSI-RS)

[0307] In Rel.15, CSI-RS is used, for example, as a DL RS 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 transmissions. The frequency density of CSI-RS can be set to adjust overhead and CSI estimation accuracy.

[0308] 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 (partial resource location (k-bar, l-bar)), code division multiplexing (CDM) group index, and resource location 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 overlined representation of "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.

[0309] As CDM groups, there are no CDM (no CDM, N / A), FD-CDM2, CDM4, and CDM8. FD-CDM2 multiplexes a 2-port CSI-RS (FD2) in both time and frequency by multiplying the RE unit by a frequency domain (FD)-orthogonal cover code (OCC) of length 2. CDM4 multiplexes a 4-port CSI-RS (FD2TD2) in both time and frequency by multiplying the RE unit and symbol unit by a FD-OCC of length 2 and a time domain (TD)-OCC of length 2. CDM8 multiplexes an 8-port CSI-RS (FD2TD4) in both time and frequency by multiplying the RE unit and symbol unit by a FD-OCC of length 2 and a TD-OCC of length 4.

[0310] Figures 2A-2D This is a diagram illustrating an example of FD-OCC and TD-OCC. The FD-OCC sequence is obtained via w f (k') represents the sequence of TD-OCC via w t (k') is used to represent this. Figure 2A This indicates the case where the CDM type is "no CDM". Figure 2B This indicates the case where the CDM type is FD-CDM2. Figure 2C This indicates the case where the CDM type is CDM4. Figure 2D This indicates the case where the CDM type is CDM8.

[0311] Figure 3 It means based on Figure 1 A diagram illustrating an example of CSI-RS location per port. The diagram, per port, represents frequency density, component resource size (magnitude in the frequency direction [RE], magnitude in the time direction [symbol]), and CDM type.

[0312] For example, Figure 4 This is an example of a CSI-RS resource element (RE) mapping where the number of ports is set to 32 and the component resource size is set to 2 subcarriers × 2 symbols. Figure 1(Row index 17). In the frequency and time domains of 1 physical resource block (PRB) × 1 time slot, 2 subcarrier × 2 symbol component resources are multiplexed 4 times in the frequency domain (FDM) and 2 times in the time domain (TDM), thus mapping 4 × 2 component resources. Furthermore, by multiplying the CSI-RS in each component resource by the FD-OCC of length 2 subcarriers and the TD-OCC of length 2 symbols, 4 CSI-RS are multiplexed (CDM) (CDM4, FD2TD2). Therefore, 32-port CSI-RS are transmitted on 1 PRB × 1 time slot resource.

[0313] The maximum number of ports in CSI-RS is 32, which is more than the maximum number of layers (8). Therefore, the UE can measure more channel states, which can improve measurement accuracy.

[0314] After Rel. 19, research focused on massive MIMO with more than 32 ports.

[0315] (Research)

[0316] Consider the following research projects.

[0317] <Study 1>

[0318] For CSI-RS ports with more than 32 ports, the layout and settings of base station antennas have not been fully studied.

[0319] <Research 2>

[0320] For CSI-RS ports with more than 32 ports, the types of codebooks / CSI supported have not been fully investigated.

[0321] If such research projects are not clearly defined, there are concerns that they may lead to a decrease in communication quality / throughput.

[0322] Therefore, the inventors of this invention conceived of a method for setting up / reporting more CSI-RS ports.

[0323] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Furthermore, the following embodiments (e.g., various scenarios) can be used individually or in combination of at least two.

[0324] 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".

[0325] In this disclosure, the terms "activate," "deactivate," "indicate," "select," "configure," "update," and "determine" can be overridden. Similarly, the terms "support," "control," "capable of control," "operate," and "capable of operation" can also be overridden.

[0326] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-level parameters, information elements (IEs), settings, etc., can also be modified interchangeably. In this disclosure, Medium Access Control (MAC) control elements (MAC control elements (CEs), update commands, activation / deactivation commands, etc., can also be modified interchangeably.

[0327] In this disclosure, higher-level signaling may be, for example, any one or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc.

[0328] 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).

[0329] In this disclosure, physical layer signaling may also be, for example, downlink control information (DCI), uplink control information (UCI), etc.

[0330] In this disclosure, a b The expressions a, b, and b appended to the right of a can also be rewritten. In this disclosure, a c The expressions a^c and a with c appended to the upper right of a can also be rewritten interchangeably. In this disclosure, a b c The expressions `a_b^c`, `append b to the lower right of a`, and `append c to the upper right of a` can also be rewritten. In this disclosure, `ceil(x)`, the floor function (rounding up), and the floor function can also be rewritten. In this disclosure, `floor(x)`, the floor function (rounding down), and the floor function can also be rewritten. In this disclosure, `sqrt(x)` and the square root function can also be rewritten. In this disclosure, x... - This can be represented by appending a tilde (~) above x, and can be called an x-shaped tilde. In this disclosure, x - It can be represented by adding a hyphen above the x, and can be called an x-bar.

[0331] The following abbreviations may also be used in this disclosure.

[0332] Time Division Multiplexing (TDM)

[0333] - Time-division multiplexing was performed: TDM was applied.

[0334] Frequency division multiplexing (FDM)

[0335] - Frequency-division-multiplexed: FDM was performed.

[0336] In this disclosure, ports, CSI-RS ports, and antenna ports can also be modified. In this disclosure, CSI-RS resources, CSI-RS settings, and resources for CSI-RS time and frequency can also be modified.

[0337] In this disclosure, beam, SD beam, spatial domain index, (i 1,1 i 1,2(l, m), precoding, precoder, quasi co-location (QCL) concept, QCL relationship, transmission configuration indicator (TCI) status, spatial domain filter, spatial domain receive filter, spatial domain transmit filter, reference signal (RS), and spatial receive parameters can also be rewritten.

[0338] In this disclosure, existing CSI-RS resources and CSI-RS resources in Rel.15 can be overwritten with each other. Additional CSI-RS resources, CSI-RS resources not present in Rel.15, and CSI-RS resources added in new versions can also be overwritten with each other.

[0339] In this disclosure, applying OCC to CSI-RS and multiplying CSI-RS by OCC can also be rewritten. Similarly, applying OCC to the received signal, multiplying the received signal by the inter-PRB OCC, and dividing the received signal by the inter-PRB OCC can also be rewritten.

[0340] In this disclosure, CSI-RS with more than 32 ports, enhanced CSI-RS, and enhanced CSI-RS ports can be modified to each other. In this disclosure, CSI-RS with fewer than 32 ports, existing CSI-RS, and existing CSI-RS ports can also be modified to each other.

[0341] In this disclosure, antenna settings, (base station) antenna layout, {N1, N2, N g , N g1 , N g2 At least one of them can be rewritten from each other.

[0342] In this disclosure, codebooks, codebook structures, codebook designs, precoding matrices, the relationship between precoding matrices and codebook indexes, CSI reports, and PMIs can all be rewritten.

[0343] (Wireless communication method)

[0344] <Implementation Method A1>

[0345] PRB OCC

[0346] OCC (frequency domain OCC, inter-PRB OCC) can be applied across multiple PRBs to CSI-RS. Values ​​(elements) within the inter-PRB OCC can also be applied to each PRB. Values ​​within the inter-PRB OCC can also be applied to more than one PRB. Values ​​within the inter-PRB OCC can also be applied to each precoding resource block group (PRG).

[0347] The PRG can also be a series of PRBs for which the same precoding is applied in the DL. The UE can also be envisioned as applying the same precoding in the consecutive allocation of multiple PRBs in the DL within the PRG.

[0348] Inter-PRB OCC can also be applied to consecutive PRBs. For example, such as Figure 5A As shown, the OCC between PRBs with a length of 2 can also be applied to PRB#0 and PRB#1.

[0349] Inter-PRB OCC can also be applied to non-contiguous PRBs. For non-contiguous PRBs, they can be PRBs with an even number of PRB indices among multiple PRBs defined for CSI-RS resources, PRBs with an odd number of PRB indices among multiple PRBs defined for CSI-RS resources, PRBs with a certain number of PRB intervals among multiple PRBs defined for CSI-RS resources, PRBs with a Comb structure for multiple PRBs defined for CSI-RS resources, or PRBs defined sequentially from the lowest PRB (the PRB with the smallest index) or the highest PRB (the PRB with the largest index) among multiple PRBs defined for CSI-RS resources.

[0350] For example, such as Figure 5B As shown, the OCC [w] of the PRB with a length of 2 f (0) w f (1) can also be applied to PRB#0 and PRB#2, which have even PRB indices. [w f (0) w f (1) can also be [+1 +1] or [+1 -1].

[0351] In cases where CSI-RS is mapped only to PRBs with odd or even PRB indices, inter-PRB OCC may not be applied. However, inter-PRB OCC may also be applied in cases where CSI-RS is mapped only to PRBs with odd or even PRB indices.

[0352] Alternatively, the association between the OCC index i and the OCC value between PRBs can be specified according to the OCC length between each PRB (e.g., a table). The values ​​of the OCC between PRBs can also be specified using a circular shift α (e.g., exp(jα·m), exp(j2πφ(m) / N) etc.).

[0353] When the inter-PRB OCC length is 2, the inter-PRB OCC can also be a Rel.15 time-domain OCC (double symbol OCC). The inter-PRB OCC can also be specified using a cyclic shift α = {0, π}.

[0354] When the OCC length between PRBs is 4, the OCC between PRBs can be specified either by a table or by using a cyclic shift. The OCC between PRBs can also be specified by using a cyclic shift α = {0, π / 2, π, 3π / 2}.

[0355] When the OCC length between PRBs is 3, the OCC between PRBs can be specified either by a cyclic shift α = {0, π / 3, 2π / 3} or by a table containing values ​​obtained from the cyclic shift. The cyclic shift α can also be {0, -π / 3, -2π / 3}.

[0356] For example, based on Figure 6A For CSI-RS with PRB inter-OCC [+1 +1] applied with OCC index = 0, since it is the same as CSI-RS without PRB inter-OCC applied, it is received and measured through the same operation as Rel.15, and is received by Rel.15 UEs and newer versions of UEs. CSI-RS with PRB inter-OCC [+1 -1] applied with OCC index = 1 is only received and measured by newer versions of UEs.

[0357] For example, based on Figure 6B For CSI-RS with PRB inter-OCC [exp(j0·0) exp(j0·1) exp(j0·2)] (same as [+1 +1 +1]) applied with OCC index = 0, it is received and measured through the same operation as Rel.15, and is received by Rel.15 UEs and newer versions of UEs, since it is the same as CSI-RS without PRB inter-OCC applied. CSI-RS with PRB inter-OCC applied with OCC index = 1 or 2 is only received and measured by newer versions of UEs.

[0358] For example, based on Figure 6CFor CSI-RS with PRB inter-OCC [+1 +1 +1 +1] having OCC index = 0, since it is the same as CSI-RS without PRB inter-OCC, it is received and measured through the same operation as Rel.15, and is received by Rel.15 UEs and newer versions of UEs. CSI-RS with PRB inter-OCC having OCC indices = 1, 2, or 3 are only received and measured by newer versions of UEs.

[0359] UE Operation

[0360] UEs that support inter-PRB OCC (e.g., newer UE versions) can also measure CSI-RS by multiplying the value within the inter-PRB OCC for each PRB and adding the resulting multiplications together (in-phase combining).

[0361] UEs that do not support inter-PRB OCC or have not configured inter-PRB OCC (e.g., older UEs) can also measure CSI-RS by adding the received signals of each PRB across multiple PRBs.

[0362] The UE may also not assume that the time and frequency resources of the CSI-RS of the PRB-OC overlap only partially with the time and frequency resources of the CSI-RS of other UEs. For example, the UE may also not assume that... Figure 7A This is illustrated in the case where the new version of CSI-RS is mapped to PRB#0 and 1, and OCC is applied between PRBs, while the old version of CSI-RS is mapped to PRB#1. In this case, the new version of CSI-RS and the old version of CSI-RS are not orthogonal (and cannot be separated by the UE).

[0363] It can also apply the entirety of the time and frequency resources of the CSI-RS between PRBs and the entirety of the time and frequency resources of the CSI-RS with other UEs. For example, such as Figure 7B As shown, alternatively, the new version of CSI-RS can be mapped to PRB#0,1 and inter-PRB OCC can be applied, while the old version of CSI-RS can be mapped to PRB#0,1. In this case, the new version of CSI-RS and the old version of CSI-RS are orthogonal (and can be separated by the UE).

[0364] The transmission bandwidth (number of PRBs) of CSI-RS can also be a multiple of the inter-PRB OCC length. The UE can also assume that the transmission bandwidth (number of PRBs) of CSI-RS is a multiple of the inter-PRB OCC length. The UE can also measure CSI-RS by applying inter-PRB OCC through bandwidth that is a multiple of the inter-PRB OCC length.

[0365] The older version of the UE summed the received signals of each PRB by a multiple of the inter-PRB OCC length, thereby enabling the measurement of only the CSI-RS (corresponding to all inter-PRB OCCs with a value of +1) that did not apply the inter-PRB OCC, and removing the CSI-RS corresponding to other inter-PRB OCCs.

[0366] If the CSI-RS transmit bandwidth is not a multiple of the inter-PRB OCC length, the UE can measure only the bandwidth that is a multiple of the inter-PRB OCC length in the CSI-RS, without measuring the remaining bandwidth. For example, if the inter-PRB OCC length is 2, the UE can apply the inter-PRB OCC to the received signal of the CSI-RS resource for measurement every 2 PRBs (or apply the corresponding inter-PRB OCC value to the received signal of each of the two PRBs). The UE can also choose not to measure the remaining bandwidth that is less than 2 PRBs.

[0367] Even the aforementioned Figure 7B In such cases, if the older version of the UE does not know the OCC length between PRBs, there is a concern that it may not be able to properly measure CSI-RS, and the new version of CSI-RS may sometimes become an interference.

[0368] For multiple CSI-RS transmitted using the same precoding, the measurement accuracy of CSI-RS can be improved by combining these CSI-RS in phase, without channel variations.

[0369] The older version of the UE can also in-phase synthesize the received CSI-RS signals (complex numbers) of each PRB within the PRG. Through this operation, even if the older version of the UE is unaware that inter-PRB OCC has been applied, it can still measure the CSI-RS using the same receiving operation as when all inter-PRB OCC values ​​are +1. Therefore, the older version's CSI-RS and the newer version's CSI-RS are orthogonal.

[0370] The inter-PRB OCC length can also be the number of PRBs within the PRG. Alternatively, CSI-RS can be mapped to all PRBs within the PRG, and the inter-PRB OCC can be applied.

[0371] The inter-PRB OCC length can also be the number of PRBs mapped to CSI-RS within the PRG. For example, suppose one PRG has 4 PRBs, and CSI-RS is mapped to 2 PRBs within the PRG, with an inter-PRB OCC length of 2. In this case, the older version UE measures CSI-RS by in-phase combining the received signals of CSI-RS within the PRG. Thus, even without knowing that inter-PRB OCC is applied, it will perform the receiving operation corresponding to the case where inter-PRB OCC [+1 +1] is applied. Therefore, the older version UE can suppress interference from the new version CSI-RS to measure the older version CSI-RS. In this case, the new version UE knows that inter-PRB OCC is applied, so it will apply inter-PRB OCC [+1 -1] and in-phase combine the received signals of CSI-RS within the PRG to measure CSI-RS. Thus, the new version UE can suppress interference from the older version CSI-RS to measure the new version CSI-RS.

[0372] If the number of PRBs within a PRG is not a multiple of the OCC length between PRBs, the UE can measure only the bandwidth that is a multiple of the OCC length between PRBs in the PRG, without measuring the remaining bandwidth.

[0373] [Measurement of the overall resource scope]

[0374] In the same time and frequency resources as CSI-RS with or without PRB OCC, it is possible to send CSI-RS with PRB OCC to other UEs. A UE can also measure the CSI-RS corresponding to a specific PRB OCC by receiving CSI-RS within the resource range (e.g., band domain) where PRB OCC may be applied.

[0375] exist Figure 8 In the example, CSI-RS#0-0 in PRB#0 and CSI-RS#1-0 in PRB#1 are mapped to the same position in the same time slot within each PRB and have the same CSI-RS sequence (transmit signal sequence).

[0376] For a UE that has CSI-RS resources configured with an inter-PRB OCC (e.g., [+1 +1]) with all values ​​of +1, or a UE that has CSI-RS resources configured without an inter-PRB OCC, CSI-RS can be measured in each PRB without using inter-PRB OCC, as long as the CSI-RS of other UEs that are multiplexed on the time and frequency resources of that CSI-RS are not transmitted.

[0377] If inter-PRB OCC is potentially applied, the UE cannot accurately measure the CSI-RS in each PRB if it is unaware of the inter-PRB OCC.

[0378] The UE can also measure the CSI-RS corresponding to a specific PRB OCC by applying a specific PRB OCC with all values ​​of +1 to the overall received signal of the resource range where the PRB OCC may be applied.

[0379] The scope of resources from which inter-PRB OCC may be applied can be specified in the standard or set for the UE via higher-layer signaling. The resource scope can also be represented in units of 2 PRBs (pairs of even-numbered and odd-numbered PRB indices), 3 PRBs, or 4 PRBs. The UE can also determine the scope of resources from which inter-PRB OCC is applied based on the designated CSI-RS resource bands (PRBs).

[0380] The UE can also be notified whether inter-PRB OCC is applied via at least one of higher-layer signaling, MAC CE, and DCI. The UE can also switch reception operations according to this notification. For example, for a UE notified that inter-PRB OCC is not applied (or that CSI-RS to other UEs are not multiplexed in the time and frequency resources of CSI-RS), CSI-RS can be measured in each of at least one PRB within the resource range, or multiple PRBs within the CSI-RS resource can be in-phase synthesized. For example, for a UE notified that inter-PRB OCC is applied (or that CSI-RS to other UEs are multiplexed in the time and frequency resources of CSI-RS), inter-PRB OCC can be determined based on the received signals of all PRBs, and CSI-RS with the determined inter-PRB OCC applied can be measured.

[0381] According to this implementation, by applying inter-PRB OCC to CSI-RS across multiple PRBs, the number of orthogonal (multiplexed) CSI-RS (ports) can be increased.

[0382] <Implementation Method A2>

[0383] Inter-Time Field OCC

[0384] OCCs (Time Domain OCC, Inter-Time Field OCC) can also be applied to CSI-RS across multiple time fields in the time domain. Values ​​(elements) within an Inter-Time Field OCC can also be applied per time field (period). A time field can be any of a subframe, time slot, sub-time slot, mini-time slot, or symbol. A time field can also be longer than a symbol.

[0385] Inter-temporal OCC can also be applied to continuous time fields. For example, it can also be used as follows: Figure 9 As shown, the time field is a time slot, and the inter-slot OCC (w) is a time slot with a length of 2. t (0) w t (1)] Applied to time slot #0 and time slot #1. [w t (0)w t (1) can also be [+1 +1] or [+1 -1].

[0386] The time-interval OCC can also be defined similarly to the PRB-interval OCC in implementation A1, specifying the association between the OCC index i and the value of the time-interval OCC according to the length of each time-interval OCC (e.g., a table). The values ​​of the time-interval OCC can also be specified using a circular shift α (e.g., exp(jα·m), exp(j2πφ(m) / N) etc.). When the OCC length is 2, the values ​​of the time-interval OCC can also be specified using a circular shift α = {0, π}. When the OCC length is 3, the OCC can be specified either using a circular shift α = {0, π / 3, 2π / 3} or using a table containing values ​​obtained from the circular shift. The circular shift α can also be {0, -π / 3, -2π / 3}. When the OCC length is 4, the OCC can be specified either using a table or using a circular shift α = {0, π / 2, π, 3π / 2}. Similar to the case where OCC is 3, the order of the values ​​of the cyclic shift α can also be changed.

[0387] Inter-time field OCC can also be applied to discontinuous time fields. For discontinuous time fields, there can be multiple time fields with even-numbered indices within the period set for CSI-RS resources, multiple time fields with odd-numbered indices within the period set for CSI-RS resources, multiple time fields with a certain number of time fields within the period set for CSI-RS resources, or the time fields can be specified sequentially starting from the first (with the smallest index) or the last (with the largest index) time field within the period set for CSI-RS resources.

[0388] When CSI-RS is mapped only to odd-indexed or even-indexed time fields, inter-time field OCC may not be applied. However, inter-time field OCC can be applied when CSI-RS is mapped only to odd-indexed or even-indexed time fields. In this case, orthogonality beyond inter-time field OCC can be guaranteed, preventing measurement quality degradation.

[0389] The OCC length between time fields can also be the number of time fields (e.g., time slots) within an application period (e.g., a wireless frame) consisting of a given number of time fields.

[0390] Consider the possibility that performing sequence skipping in CSI-RS during the application period would disrupt the orthogonality between multiple time-field OCCs reused during that application period. Therefore, sequence skipping can also be stopped within the resource range where time-field OCCs may be applied.

[0391] CSI-RS sequences can also be pseudo-random sequences (pseudo-noise (PN) sequences, such as Gold sequences, 31-bit Gold sequences, and M sequences). In Rel. 15, the initial value c used to determine the CSI-RS sequence... init Based on time slot index and symbol index.

[0392] When an inter-time slot OCC (Inter-time Slot OCC) is applied across application periods, it can also stop sequence jumps (the c-code of the beginning or end of the code) within the application period. init It can also be applied to all code elements during the application period.

[0393] Because of c init It is configured to be UE-specific; therefore, the network (e.g., the base station) configures it for the UE via higher-layer signaling. init The scrambling ID (e.g., scramblingID) is used to prevent sequence skipping during the application.

[0394] UE Operation

[0395] UEs that support inter-time field OCC (e.g., newer versions of UEs) can also measure the following CSI-RS, which is obtained by multiplying the value within the inter-time field OCC by each time field and adding the results of the multiplication (in-phase synthesis).

[0396] UEs that do not support inter-time field OCC or whose inter-time field OCC is not set (e.g., older versions of UEs) can also measure CSI-RS by adding the received signals of each time field in multiple time fields.

[0397] The UE may also not assume that the time and frequency resources of the CSI-RS applied in the time field OCC overlap with a portion of the time and frequency resources of the CSI-RS of other UEs.

[0398] The time and frequency resources of the CSI-RS of the application time field OCC can overlap with the time and frequency resources of the CSI-RS of other UEs.

[0399] The duration (number of time fields) of CSI-RS can also be a multiple of the OCC length between time fields.

[0400] The old version of the UE summed the received signals of each time field by a multiple of the inter-time field OCC length, thereby enabling the measurement of only the CSI-RS of the inter-time field OCC that was not applied (corresponding to the inter-time field OCC with all values ​​of +1), and the removal of the CSI-RS corresponding to other inter-time field OCCs.

[0401] If the transmission bandwidth of CSI-RS is not a multiple of the time-field OCC length, the UE can also measure only the period that is a multiple of the time-field OCC length in CSI-RS, without measuring the remaining period.

[0402] [Measurement of the entire resource scope]

[0403] In resources with the same time and frequency as CSI-RS with or without Inter-Time Field OCC, it is possible to send CSI-RS with Inter-Time Field OCC to other UEs. UEs can also measure the CSI-RS corresponding to a specific Inter-Time Field OCC by receiving CSI-RS within the resource range (e.g., period) where Inter-Time Field OCC may be applied.

[0404] For a UE that has a CSI-RS resource with an application of time field OCC (e.g., [+1 +1]) that is set to apply all values ​​of +1, or a UE that has a CSI-RS resource with no application of time field OCC, CSI-RS can be measured in each time field without using time field OCC, as long as the CSI-RS of other UEs multiplexed on the time and frequency resources of that CSI-RS is not transmitted.

[0405] If the time-field OCC is likely to be applied, the UE cannot accurately measure the CSI-RS in each time field if it does not know the time-field OCC.

[0406] The UE can also apply a specific time-field OCC with all values ​​of +1 to the received signal of the entire resource range within the resource range where the time-field OCC may be applied, thereby measuring the CSI-RS corresponding to the specific time-field OCC.

[0407] The scope of resources from which inter-time-field OCC may be applied can be specified in the standard or set for the UE via higher-layer signaling. The resource scope can also be represented in units of two time fields (a pair of even-numbered and odd-numbered time field indices), three time fields, or four time fields. The UE can also determine the scope of resources from which inter-time-field OCC is applied based on the duration (number of symbols) of the configured CSI-RS resources.

[0408] The UE can also be notified whether inter-time field OCC is applied via higher-layer signaling and at least one of MAC CE and DCI. The UE can also switch reception operations according to this notification. For example, for a UE notified that inter-time field OCC is not applied (or that CSI-RS to other UEs is not multiplexed in the time and frequency resources of CSI-RS), CSI-RS can be measured in each of at least one time field within the resource range, or multiple time fields within the CSI-RS resource can be in-phase synthesized. For example, for a UE notified that inter-time field OCC is applied (or that CSI-RS to other UEs is multiplexed in the time and frequency resources of CSI-RS), inter-time field OCC can be determined based on the received signals of all time fields, and CSI-RS with the determined inter-time field OCC applied can be measured.

[0409] According to this implementation, by applying time-field OCC to CSI-RS across multiple time fields, the number of orthogonal (multiplexed) CSI-RS (ports) can be increased.

[0410] <Implementation Method A3>

[0411] Rel.15 uses 32 resources (RE, subcarrier × symbol) within one PRB, supporting a maximum of 32 CSI-RS ports. The number of CSI-RS ports can also be increased by increasing the time and frequency resources within each PRB.

[0412] The UE can also use at least one resource (time and frequency resources) not used for Rel.15 CSI-RS (existing CSI-RS resources) to receive CSI-RS. For example... Figure 10 As shown, for existing CSI-RS resources, new CSI-RS resources (additional CSI-RS resources) can also be specified in symbols #2, #3, #9, and #10. Thus, using CSI-RS resources with 64 REs within one PRB can be associated with 64 ports.

[0413] For additional CSI-RS resources, at least one of time-domain OCC and frequency-domain OCC can be applied.

[0414] To maintain compatibility with Rel.15, for CSI-RS, after applying at least one of the time-domain OCC and frequency-domain OCC of Rel.15, an additional time-domain OCC and frequency-domain OCC (additional OCC) can also be applied.

[0415] For example, such as Figure 11 As shown, for Figure 10 Existing CSI-RS resources and additional CSI-RS resources, after applying at least one of the time-domain OCC and frequency-domain OCC of Rel.15, apply the additional time-domain OCCw t '(m)[w t '(0) w t '(1)〕 can also be [+1 +1] or [+1 -1]. The additional time-domain OCC values ​​can also be applied in groups of 2 symbols.

[0416] In this example, w is applied to code elements #4 and #5. t '(0)Apply w to code elements #2 and #3 t '(1)Apply w to code elements #11 and #12 t '(0)Apply w to code elements #9 and #10 t '(1)。

[0417] Alternatively, you can append the value at the beginning of OCC (e.g., w). t '(0)' is always +1, and the value of CSI-RS will not change even if an OCC is applied. Therefore, the value at the beginning of the OCC applied to the existing CSI-RS resource (e.g., w) should be changed. t '(0)), for appending CSI-RS resources, apply the value following the beginning of OCC (e.g., w t (1) Thus, the old version of UE can measure CSI-RS, while the number of ports of the new version of CSI-RS can be increased.

[0418] [w] t '(0) w t [(1)] It can be applied either in order from the largest symbol index to the smallest symbol index, or in order from the smallest symbol index to the largest symbol index. For example, it can also be applied to symbol #2 and #3. t '(0)Apply w to code elements #4 and #5 t '(1)。

[0419] According to this implementation, it is possible to increase the time and frequency resources of CSI-RS and to increase the number of CSI-RS ports.

[0420] <Implementation Method A4>

[0421] In Rel.15, the UE is not designed so that the RE for CSI-RS is the same as the RE for DMRS. As a result, the flexibility in setting at least one of CSI-RS and DMRS is reduced.

[0422] CSI-RS can also be truncated.

[0423] In this disclosure, the following can be modified: truncating CSI-RS, not mapping CSI-RS on a portion of the time and frequency resources of CSI-RS, and not transmitting a portion of CSI-RS.

[0424] On resources that were not mapped to CSI-RS due to censorship by a certain UE, signals from other UEs (e.g., CSI-RS) can also be transmitted.

[0425] Deletion can also be performed in units of time and frequency resources of a certain size (e.g., component resources, resources with applied frequency domain OCC, resources with applied time domain OCC).

[0426] For CSI-RS, CSI-RS can also be sent based on at least one of the following CSI-RS resource control methods 1 to 3.

[0427] CSI-RS Resource Control Method 1

[0428] NZP-CSI-RS can also be truncated on the set zero power (ZP)-CSI-RS. NZP-CSI-RS can also be mapped to resources other than those set for ZP-CSI-RS among the resources set for NZP-CSI-RS.

[0429] In cases where the time and frequency resources of ZP-CSI-RS overlap with at least a portion of the time and frequency resources of NZP-CSI-RS, the UE may choose not to receive NZP-CSI-RS on the overlapping RE, or on the overlapping PRB, or on the overlapping RE, or on the overlapping PRB, or not assume that DMRS will be set (or mapped) on the overlapping resources, or measure (receive) at least one of ZP-CSI-RS and NZP-CSI-RS on the overlapping resources if DMRS is set (or mapped) on the overlapping resources, or measure (receive) DMRS on the overlapping resources if DMRS is set (or mapped) on the overlapping resources.

[0430] CSI-RS Resource Control Method 2

[0431] The UE may also be notified of a bitmap representing the truncated location (e.g., at least one location of time and frequency) in a resource representing the time and frequency of CSI-RS. The bitmap may also be included in the CSI-RS resource. The UE may also truncate CSI-RS at locations represented by the bitmap. The UE may truncate either NZP-CSI-RS or ZP-CSI-RS at locations represented by the bitmap.

[0432] Each bit in the bitmap can correspond to either a RE (subcarrier) or a PRB. The UE can choose not to receive NZP-CSI-RS on either the RE or the PRB represented by the bitmap. Similarly, the UE can choose not to receive ZP-CSI-RS on either the RE or the PRB represented by the bitmap. DMRS can also be left unconfigured (or unmapped) on resources represented by the bitmap. Alternatively, the UE can choose not to configure (or map) DMRS on resources represented by the bitmap. DMRS can be configured (or mapped) on resources represented by the bitmap, and the UE can also receive or measure DMRS on these resources.

[0433] CSI-RS Resource Control Method 3

[0434] In the case where CSI-RS is truncated based on CSI-RS resource control method 1 or 2, PDSCH may not be sent on resources that are not mapped to CSI-RS due to the truncation (and may not be mapped to the truncated location).

[0435] On resources where CSI-RS is not mapped due to truncation, PDSCH can also be rate-matched or truncated. The UE can also assume that PDSCH is rate-matched or truncated on that resource.

[0436] On resources that are not mapped to CSI-RS due to truncation, PDSCH may also be exempt from rate matching or truncation. The UE may also assume that PDSCH is not rate matched or truncation on such resources. PDSCH can still be sent on resources that are not mapped to CSI-RS due to truncation (and PDSCH can also be mapped on such resources).

[0437] The UE can also be notified of the location where the PDSCH is rate-matched or truncated. The location where the PDSCH is rate-matched or truncated can be notified as antenna port information, as the CDM group of CSI-RS, or as the subcarrier number (e.g., k0) and symbol number (e.g., l0).

[0438] According to this implementation, by appropriately truncating CSI-RS and properly handling resources that are not mapped to CSI-RS due to truncation, the flexibility of CSI-RS settings can be improved.

[0439] <Implementation Method A5>

[0440] Multiple groups of CSI-RS resources (CSI-RS resource groups) can also be associated with different groups of CSI-RS ports (CSI-RS port groups).

[0441] Multiple CSI-RS resource groups can also be grouped using at least one of the following CSI-RS resource grouping methods 1 and 2.

[0442] CSI-RS Resource Grouping Method 1

[0443] Among multiple CSI-RS resource groups, at least one resource used for CSI-RS time and frequency can also be different.

[0444] Multiple CSI-RS resource groups can also be reused through at least one of FDM and TDM. For example, Figure 12 As shown, CSI-RS resource groups #0 and #1 can also be TDMed. Alternatively, CSI-RS resource group #0 can be associated with groups of CSI-RS ports #0 to #31, and CSI-RS resource group #1 can be associated with groups of CSI-RS ports #32 to #64. CSI-RS resource group #0 can also be an existing CSI-RS resource, and CSI-RS resource group #1 can also be an additional CSI-RS resource.

[0445] exist Figure 1 Such a table can also be appended with entries (rows) containing groups that add CSI-RS resources. It can also be appended with entries indicating more than 32 ports.

[0446] In the tables representing existing CSI-RS resources and additional CSI-RS resources, additional CSI-RS resources can be added in either the entry representing fewer than 32 ports (lower-order ports) or the entry representing more than 32 ports (higher-order ports), or only in the entry representing higher-order ports.

[0447] The UE can also be configured to add CSI-RS resources via higher-layer signaling. The UE can also be configured to add existing CSI-RS resources via higher-layer signaling, using at least one offset of time and frequency. For example, in the aforementioned... Figure 12In the example, the UE can also decide to add CSI-RS resources by adding an offset of -2 symbols in the time direction to the existing CSI-RS resources.

[0448] Because multiple CSI-RS resource groups are orthogonal through time and frequency resources, the UE can receive data without using the new OCC, thus improving compatibility with older UE versions.

[0449] CSI-RS Resource Grouping Method 2

[0450] Among multiple CSI-RS resource groups, the CSI-RS sequence, and the initial value c used to determine the CSI-RS sequence. init At least one of the scrambling IDs used can be different.

[0451] For example, such as Figure 13 As shown, CSI-RS resource groups #0 and #1 can also be associated with different scrambling IDs. Alternatively, CSI-RS resource group #0 can be associated with CSI-RS ports #0 to #31, and CSI-RS resource group #1 can be associated with CSI-RS ports #32 to #64. CSI-RS resource group #0 can also be an existing CSI-RS resource, and CSI-RS resource group #1 can also be an additional CSI-RS resource.

[0452] The association between at least one of the CSI-RS sequences and scrambling IDs, and at least one of the CSI-RS resources and CSI-RS ports, can also be specified in the specification. For example, the CSI-RS for ports #0 to #X-1 could be based on a table representing existing CSI-RS resources (e.g., Figure 1 ), and c as specified in the old version init To determine the CSI-RS for ports #X to #2X-1, the table is used as a reference, along with variations specified in the new version. init That's for you to decide.

[0453] c init And the variant c init It can also be based on different high-level parameters (e.g., different scrambling IDs, scramblingIDs, and scramblingID_2).

[0454] UE can also be configured for c init The scrambling ID (e.g., different scrambling IDs), and used with c init Different operations are performed to calculate the deformation c based on the scrambling ID. init For example, the UE can also use the value obtained by adding a specific value to a set scrambling ID as a variant c. initThe scrambling ID used is for c init Calculate the formula, and from this, calculate the transformed c. init The specific value can also be the cell ID, etc. The UE can also calculate the deformed value c by adding a specific value to the set scrambling ID and performing a modulo operation. init .

[0455] In the table representing existing CSI-RS resources and additional CSI-RS resources, additional CSI-RS resources can be added in both the entries representing the number of ports below 32 (low-order ports) and the entries representing the number of ports above 32 (high-order ports), or only in the entries representing the number of high-order ports.

[0456] Because CSI-RS sequences (pseudo-random sequences) have low correlation with other sequences, the time and frequency resources of CSI-RS associated with low port numbers (e.g., numbers less than half the number of ports) (e.g., existing CSI-RS resources) and the time and frequency resources of CSI-RS associated with high port numbers (e.g., numbers more than half the number of ports) (e.g., additional CSI-RS resources) can completely overlap or partially overlap.

[0457] The UE can also be configured to add CSI-RS resources via higher-layer signaling. The UE can also be configured with existing CSI-RS resources via higher-layer signaling, using at least one offset of time and frequency to determine the addition of CSI-RS resources. For example, in the aforementioned... Figure 13 In the example, the UE can also determine the time and frequency resources for adding CSI-RS by adding a 0 symbol offset in the time direction and a 0 PRB offset in the frequency direction to the existing CSI-RS resources. The UE can also assume that the added CSI-RS resources completely overlap with the existing CSI-RS resources in terms of time and frequency.

[0458] Because multiple CSI-RS resource groups are distinguished by CSI-RS sequences, the UE can receive signals without using a new OCC, improving compatibility with older UE versions. Even if the CSI-RS sequences (pseudo-random sequences) are not perfectly orthogonal, interference between ports can be suppressed by applying different precoding (beaming) between ports.

[0459] <Study B>

[0460] Sharing the same CSI-RS resources may be difficult between existing (e.g., Rel. 15-18, up to 32 ports) and new (e.g., Rel. 19, more than 32 ports) CSI-RS. Because existing UEs cannot de-spread new TD-OCC / FD-OCC, the base station needs to allocate dedicated sets of CSI-RS resources for both existing (e.g., Rel. 15-18) and new (e.g., Rel. 19) UEs. This incurs CSI-RS overhead. To reduce CSI-RS overhead, performance improvements with more than 23 CSI-RS ports may be limited.

[0461] <Implementation Method B1>

[0462] Alternatively, more than 32 ports can be imported into the same CSI-RS resource (time and frequency resources), and different CSI-RS resources can use different CSI-RS ports. Multiple CSI-RS resources can also be aggregated for a new UE.

[0463] For example, two CSI-RS resources can be configured: the first CSI-RS resource is associated with CSI-RS ports #0 to #31, and the second CSI-RS resource is associated with CSI-RS ports #32 to #63. In this scenario, it is easy to share the CSI-RS resources between existing UEs and new UEs. Alternatively, for existing UEs, only the first CSI-RS resource can be configured, while for new UEs, both the first and second CSI-RS resources can be configured.

[0464] According to this implementation, by changing the definition of CSI-RS port mapping, more than 32 CSI-RS ports can be defined, which can reduce the impact on the specification.

[0465] like Figure 14 As in the example, it is also possible to set CSI-RS resource #1 and CSI-RS resource #2 to be FDMed, 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.

[0466] like Figure 15 As in the example, it is also possible to set CSI-RS resource #1 and CSI-RS resource #2 to be TDM, 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.

[0467] 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,...).

[0468] The method of mapping more than 32 CSI-RS ports to multiple CSI-RS resources can also follow at least one of the following implementations B1-X.

[0469] Implementation Method B1-1

[0470] When a UE is configured with higher-layer parameters activating more than 32 CSI-RS ports and has x CSI-RS ports and y CSI-RS resources configured, the UE may also map CSI-RS ports according to at least one of the following rules. x may also be less than 32.

[0471] - The first resource within a set of y CSI-RS resources (or CSI-RS resource sets) is mapped to CSI-RS ports #0 to #x-1.

[0472] - The second resource within a set of y CSI-RS resources (or CSI-RS resource sets) is mapped to CSI-RS ports #x to #2x-1.

[0473] - The third resource within a set of y CSI-RS resources (or CSI-RS resource sets) is mapped to CSI-RS ports #2x to #3x-1.

[0474] - The i-th resource in y CSI-RS resources (or a set of CSI-RS resources) is mapped to CSI-RS ports #(i-1)x to #ix-1. The i-th resource can be either the CSI-RS resource corresponding to the i-th time resource (e.g., a time slot) or the CSI-RS resource corresponding to the i-th frequency resource (e.g., a PRB).

[0475] Implementation Method B1-2

[0476] Multiple CSI-RS resources that are aggregated 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 be subject to at least one of the following constraints.

[0477] - Option 1: The number of CSI-RS resources used for aggregation is M. For example, M can also be 2.

[0478] - Option 2: The number of ports associated with each CSI-RS resource used for aggregation is fixed at N, or more than O (above O). For example, N could also be 32. For example, O could also be 16.

[0479] - Option 3: Multiple CSI-RS resources used for aggregation can also be set within the same CSI-RS resource set or CSI-RS resource group.

[0480] 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 bandwidth-level or RB-level. The bandwidth-level can also be the number of PRBs and the starting PRB. The time resource configuration can also be at the time slot level. The QCL assumption can also be the associated SSB. 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.

[0481] - Option 5: Multiple CSI-RS resources used for aggregation can be in up to M consecutive time slots or in consecutive / comb frequency resources.

[0482] - Example: Alternatively, M=2 CSI-RS resources can 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 located in the same CSI-RS resource set or group, have the same frequency resource configuration, and are configured in two consecutive time slots.

[0483] Implementation Methods B1-3

[0484] 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 smaller than the existing density can also be set.

[0485] <Base Station Antenna Layout>

[0486] Figure 16 This table shows the relationship between the number of supported CSI-RS ports and the base station antenna layout (settings of (N1, N2) and (O1, O2)) for existing specifications for single-panel displays. Figure 17Indicates the association (table) between the number of supported CSI-RS ports for multi-panel in the existing specification and the settings of base station antenna layouts ((N g , N1, N2) and (O1, O2)).

[0487] <CSI Settings / Measurements / Reports>

[0488] The UE can also obtain CSI by measuring CSI-RS (resources) using ports to which at least one of Embodiment A1 to Embodiment A5 and Embodiment B1 is applied. The setting / reporting of this CSI can also follow at least one of the following embodiments.

[0489] <Embodiment C1>

[0490] This embodiment relates to the aforementioned Research 1.

[0491] For new antenna layouts and settings of CSI-RS using more than 32 ports, at least one of the following options can also be followed.

[0492] - Option 1

[0493] New (N1, N2) and new (O1, O2) can also be defined in the specification and set for the UE. New rows can also be added to the existing table. The new row can be used only when CSI-RS using more than 32 ports is set for the CSI codebook. Other new tables different from the existing table can also be added. The new table can be used only when CSI-RS using more than 32 ports is set for the CSI codebook. Otherwise, the existing table can also be used.

[0494] Figure 18 Shows an example of the settings related to Option 1 of Embodiment C1. At least one row in this table can also be supported. This table shows multiple combinations (rows) of the number of CSI-RS ports (>32) and (N1, N2) and (O1, O2).

[0495] - Option 2

[0496] (Similar to the settings for multi-panel,) A new parameter ng can also be added to the settings, which represents N combined with at least one value of the existing (N1,N2) and the existing (O1, O2) g . The new setting can also be defined in the specification and set for the UE.

[0497] N g can also be set as a parameter separate from the (N1, N2) setting. For example, it can be set to represent N respectivelyg The two parameters ng and n1-n2 of (N1, N2) are given. Figure 19 This represents a first example of the settings involved in Option 2 of Implementation C1. At least one combination within this table can also be supported. The table represents multiple combinations of the number of CSI-RS ports (>32), Ng, existing (N1, N2), and (O1, O2). Different (N1, N2) can also be included in different rows. Similar to the example in Option 1, (O1, O2) can also be different for different (N1, N2). The row can also be reused / carried over existing multiple port settings, without needing to OK.

[0498] N g It can also be set as a new (joint) parameter related to the (N1, N2) setting. For example, it can also be set to represent (N g A parameter ng-n1-n2 of (N1, N2). Figure 20 This represents a second example of the settings involved in Option 2 of Implementation C1. At least one row in this table may also be supported. This table represents multiple combinations (rows) of the number of CSI-RS ports (>32), new (Ng, N1, N2), and (O1, O2). The row can also be reused / carried over existing multiple port settings, without needing to OK.

[0499] UE can also be identified as extending only one dimension using Ng. For example... Figure 21A For example, antenna layouts for 64 ports (N g The arrangement of two antennas in the horizontal direction (N1, N2) = (2, 8, 2) means that the antennas are arranged horizontally with (N1, N2) = (8, 2). Figure 21B For example, antenna layouts for 128 ports (N g The arrangement of four antennas (N1, N2) = (4, 8, 2) in the horizontal direction means a horizontal antenna layout of (N1, N2) = (8, 2). In these examples, the spacing between two adjacent antenna elements in the horizontal or vertical direction is d.

[0500] - Option 3

[0501] New parameters ng1-ng2 can also be added to the settings, which represent combinations of (N1, N2) and (O1, O2) at least one of the existing values. g1 , N g2 Alternatively, this new setting can be defined in the specification and assigned to the UE.

[0502] (N)g1 , N g2 ) can also be set as a parameter separate from (N1, N2). For example, it can also be set to represent (N) g1 , N g2 The two parameters ng1-ng2 and n1-n2 of (N1, N2) are given. Figure 22 This represents the first example of the settings involved in option 3 of implementation method C1. At least one combination within this table may also be supported. This table represents the number of CSI-RS ports (>32), (N... g1 , N g2 There are multiple combinations of (N1, N2) and (O1, O2). The row can also be reused / carried over existing multiple port settings, without needing to OK.

[0503] (N) g1 , N g2 ) can also be set as a new (joint) parameter related to the (N1, N2) setting. 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 represents a second example of the settings involved in option 3 of implementation C1. At least one row in this table may 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). The row can also be reused / carried over existing multiple port settings without needing to OK.

[0504] UE can also be accessed via (N) g1 , N g2 The value N is used to identify the extension of two dimensions. g1 This can correspond to N1 (horizontal direction), N g2 Corresponding to N2 (vertical direction). For example... Figure 24A For example, antenna layouts for 128 ports (N g1 , N g2 The formula (N1, N2) = (2, 2, 8, 2) can also mean a horizontal layout with two antennas and a vertical layout with two antennas (N1, N2) = (8, 2). For example... Figure 24B For example, antenna layouts for 128 ports (N g1 , N g2The arrangement (N1, N2) = (4, 1, 8, 2) can also mean a layout of 4 antennas in the horizontal direction and 1 antenna in the vertical direction (N1, N2) = (8, 2). In these examples, the spacing between two adjacent antenna elements in the horizontal or vertical direction is d.

[0505] "change"

[0506] 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 options.

[0507] - Option 1: The value of (O1, O2) is common to all ranks (levels).

[0508] - Option 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.

[0509] According to this implementation, the UE can be appropriately configured for a base station antenna layout that utilizes more than 32 ports of CSI-RS.

[0510] <Implementation Method C2>

[0511] This implementation method relates to the aforementioned Study 2.

[0512] It can also support at least one of the following CSI / code blocks together with CSI-RS that utilizes more than 32 ports, and at least one of the following CSI / code blocks can also be configured.

[0513] - Rel. 15 Type 1 CSI (Type 1 Single-Panel Codebook)

[0514] - Rel. 15 Type 1 Multipanel CSI (Type 1 Multipanel Codebook)

[0515] - Rel. 15 Type 2 CSI (Type 2 Codebook)

[0516] - Rel. 15 Type 2 PS CSI (Type 2 Port Selection Codebook)

[0517] - Rel. 16 Type 2 CSI (Enhanced Type 2 Codebook)

[0518] - Rel. 16 Type 2 PS CSI (Enhanced Type 2 Port Selection Codebook)

[0519] - Rel. 17 Type 2 PS CSI (Additional Enhanced Type 2 Port Selection Codebook)

[0520] It is also possible to support CSI-RS using more than 32 ports for only one or more specific CSI codebooks. For example, the more than one specific CSI codebook can be at least one of a Type 1 single-panel codebook and a Type 1 multi-panel codebook. This simplifies specification / UE operation.

[0521] The CSI supporting CSI-RS with more than 32 ports can also be an enhancement of CJT CSI (CJT codebook). CJT CSI can also be at least one of Rel. 18 CJT Enhanced Type 2 CSI (CJT Enhanced Type 2 codebook) and Rel. 18 CJT Additional Enhanced Type 2 PS CSI (CJT Additional Enhanced Type 2 PS codebook). Rel. 18 CJT CSI envisions a dedicated SD base for each TRP; conversely, CJT CSI enhanced for CSI-RS with more than 32 ports can also envision a common SD base across multiple TRPs, similar to Mode 2 of the aforementioned CJT CSI. The CSI for CSI-RS with more than 32 ports can also be an enhancement of Mode 2 of CJT CSI. Either CJT using CSI Mode 1 or CJT using CSI Mode 2 for utilizing more than 32 ports of CSI-RS can be set or switched via higher-level parameters.

[0522] The settings (N1, N2) and (O1, O2) can depend on the type of codebook / CSI, or they can vary depending on the type of codebook / CSI. For example, in a type 1 multi-panel codebook, the settings of options 2 / 3 of implementation method C1 can be applied. For example, in a type 1 single-panel codebook, the settings of options 1 / 2 / 3 of implementation method C1 can also be applied.

[0523] According to this implementation, the UE can utilize an appropriate codebook / CSI for CSI-RS that uses more than 32 ports.

[0524] <Type 1 Single-panel codebook>

[0525] In addition to the aforementioned Level 1 CSI report and codebook with codebookMode = 1, a Type 1 single-panel codebook is also specified for other codebook modes and at least one of other ranks (levels).

[0526] For rank {1, 5, 6, 7, 8}, the codebook index for each PMI is i 1,1 i 1,2And 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 i 1,2 These correspond to two dimensions and are indices used for beam selection. i2 is an index used for the phase difference (co-phasing) between the two polarizations. 1,3 They are mapped to k1 and k2 according to the standard mapping (table). Figure 25 i represents the CSI report used for Layer 2. 1,3 An example of a mapping to k1 and k2. Figure 26 i indicates the CSI reporting used for Layer 3 and Layer 4. 1,3 An example of a mapping to k1 and k2.

[0527] The specification defines the relationship between the precoding matrix and the codebook index for Level 1 CSI reports and codebookMode=1. Figure 27 ).

[0528] As for the codebook for Level 1 CSI reports and codebookMode=2, the specification defines the codebook for N2>1 ( Figure 28 ) and for the codebook of N2=1 ( Figure 29 For N²=1, since there is no oversampling in N² dimensions, i is not reported. 1,2 .

[0529] The specification defines the codebook for Level 2 CSI reports and codebookMode=1. Figure 30 v l, m and φ n v l, m Corresponds to the first layer. v l’, m’ and -φ n v l’, m’ This corresponds 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 earlier, k1 and k2 are based on i reported by the UE. 1,3 And the decision.

[0530] As for the codebook for 2-layer CSI reporting and codebookMode=2, the specification defines the codebook for N2>1 ( Figure 31 ) and for the codebook of N2=1 ( Figure 32 For N²=1, since there is no oversampling in N² dimensions, i is not reported. 1,2 .

[0531] The specification defines the requirements for 3-level CSI reports and codebooks with codebookMode=1-2. Figure 33 ). θ p This represents the phase difference between the second half of the port and the first half of the port.

[0532] The structure of the 4-layer CSI report and the codebook with codebookMode=1-2 is the same as the structure of the 3-layer CSI report and the codebook with codebookMode=1-2.

[0533] The specification defines the requirements for 5-level CSI reports and codebooks with codebookMode=1-2. Figure 34 The relation (PMI) for N2>1 is different from the relation (PMI) for N2=1.

[0534] The structure of the 6-layer CSI report and the codebook with codebookMode=1-2 is the same as the structure of the 5-layer CSI report and the codebook with codebookMode=1-2.

[0535] The specification defines the requirements for 7-level CSI reports and codebooks with codebookMode=1-2. Figure 35 The relationship (PMI) varies depending on the values ​​of N1 and N2.

[0536] The structure of the 8-layer CSI report and the codebook with codebookMode=1-2 is the same as the structure of the 7-layer CSI report and the codebook with codebookMode=1-2.

[0537] For CSI-RS utilizing more than 32 ports, CSI / codebooks based on Rel. 15 Type 1 Single-Panel CSI (Type 1 Single-Panel Codebook) have not been adequately studied.

[0538] <Analysis D>

[0539] Analysis D1

[0540] The CSI feedback differs for different ranks (rank = 2, 3, 4). For example, i 1,3 It is selective feedback.

[0541] Different layers allow for different beams to be selected in W1. This is based on i 1,1 i 1,2 The selected beam, through i 1,3 The report states that additional orthogonal beam (SD) substrates for other layers can be selected.

[0542] For example, in the aforementioned 2-layer CSI report and codebook mode 1, the beam for layer 1 is determined by l and m. l and m are respectively based on i 1,1 and i 1,2 The beam of the second layer is determined by l' and m'. l' and m' are determined respectively according to i. 1,1 +k1 and i 1,2 +k2 is used to determine this.

[0543] For several ranks (rank = 5, 6, 7, 8), even if i is not in the precoding matrix W in the canonical table... 1,3 The additional feedback also defines different orthogonal beamforming bases for several other layers. For example, in Figure 36 The 8-layer CSI report and the codebook with codebookMode=1-2 define the beamforming for each layer. For layers 1 and 2, l and m are respectively based on i 1,1 and i 1,2 And that's the decision. For layers 3 and 4, l' and m' are determined according to i. 1,1 +O1 and i 1,2 And that's the decision. For layers 5 and 6, l'' and m'' are determined according to i. 1,1 and i 1,2 +O2 determines this. For layers 7 and 8, l''' and m''' are determined by i respectively. 1,1 +O1 and i 1,2 It is determined by +O2.

[0544] Analysis D2

[0545] The PMI can differ depending on the codebook pattern (1 and 2).

[0546] In codebook mode 1, the wideband beam is selected from all N1N2O1O2 beams. Phase difference is considered for each sub-band. On the other hand, in codebook mode 2, the wideband beam is selected from either N1O1 or N2O2 beams. Both beam selection and phase difference are considered for each sub-band. For example, in the Level 1 CSI report and the codebook of codebook mode 2, the i-th beam representing the wideband beam... 1,1 or i 1,2 The beams are selected from either N1O1 or half of N2O2, respectively. Besides the change in phase difference n, the selected beam for the sub-band i2 can also be chosen from (2i... 1,1 , 2i 1,2 (2i) 1,1 +1, 2i 1,2 (2i) 1,1 ,2i 1,2 +1), (2i 1,1 +1, 2i1,2 +1) Change.

[0547] "Analysis D3"

[0548] Different ranks have different numbers of CSI-RS ports and different codebook (precoding matrix) structures.

[0549] Consider two different structures of W for different ranks in different cases where the number of CSI-RS ports is ≤16 and >16.

[0550] 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 provided by the following formula.

[0551]

[0552] In structure A, only the phase difference for 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 precoder v in row N1N2 can be the same or different. For different layers, there can be a phase difference φ, no phase difference, or -φ.

[0553] The structure B for W in rank 3 and 4 applications with more than 16 CSI-RS ports can also be provided by the following formula.

[0554]

[0555] When the number of CSI-RS ports is large, W further 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, and the phase difference θ between the second half of the ports and the first half of the ports is considered. This method is used when the number of CSI-RS ports is large. Precoder v ~ It is N1N2 / 2 rows and 1 column.

[0556] Analysis of D4

[0557] The PMI can be different for different N2 values ​​(N2>1 and N2=1) and for at least one different n1-n2 (N1 and N2) values.

[0558] For N²=1, the oversampling factor is 1, and i is not required. 1,2 The report states that, for different n1-n2 values, the PMI varies, and for the selected beam, the beam (i) 1,1 i 1,2The beam is selected from a subset of N1O1 beams and N2O2 beams. For example, in the aforementioned 7-layer CSI report and codebookMode=1-2, for specific values ​​of n1-n2 (N1=4 and N2=1), beam i 1,1 Select from a portion (half) of N1O1 beams. For specific values ​​of n1-n2 (N1>2 and N2=2), beam i 1,2 Select from a portion (half) of the N2O2 beams. For a specific value of n1-n2 (N2=1), beam i 1,2 The report value is 0.

[0559] <Implementation Method D1>

[0560] When supporting / setting a Type 1 single-panel codebook 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), the codebook design can also be the same as that described in Rel. 15 Type 1 CSI.

[0561] The existing codebook design for existing CSI-RS is extended 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 be adjusted to enhance ports with more than 32 bits.

[0562] Basically, for the precoding matrix, i can be needed (can be reported) 1,1 i 1,2 i2 (for some rank i) 1,1 i 1,2 i 1,3 The codebook index (i2) can be reused / adapted from existing codebook tables, and supports rank 1 to 8 for ports with more than 32 ports.

[0563] Since the values ​​of N1O1 or N2O2 are large, therefore for each rank of i 1,1 i 1,2 The range of feedback values ​​and the number of feedback bits can also be extended. The same granularity can be maintained for i2, or finer granularity can be supported by using more bits. For example, it could 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 D2-1 can be followed.

[0564] When reusing / using an existing codebook for more than 32 ports, it is preferable to study analyses 1 to 4.

[0565] According to this implementation, the UE is able to report the appropriate codebook for CSI-RS utilizing more than 32 ports.

[0566] <Implementation Method D2>

[0567] This implementation relates to a codebook for enhancing CSI-RS.

[0568] Implementation Method D2-1

[0569] Regarding whether i is needed 1,3 The report can be defined in the specification or set through RRC.

[0570] The need for i can also be determined based on at least one of the following options. 1,3 The definition / setting of the report.

[0571] Option 1: Do you need i? 1,3 The definition / setting of a report can be applied to a specific rank, or it can be applied to all ranks together. For example, whether i is required. 1,3 The definition / setting of the report can also be applied to a part of multiple ranks.

[0572] Option 2: Do you need i? 1,3 The report definition / settings can be applied to a specific number of CSI-RS ports, or they can be applied 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.

[0573] Option 3: Do you need i? 1,3 The report's definitions / settings can be applied to specific antenna settings (n1-n2 or ng-n1-n2 or ng1-ng2-n1-n2) or can be applied to all antenna settings. For example, whether i is required... 1,3 The definition / setting of the report can also be applied to the cases where N1≥X or N2≥Y or N1≥N2 or N2=Y.

[0574] Option 4: Do you need i? 1,3 The definition / setting of the report can also follow more than two combinations of options 1 to 3.

[0575] 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 options.

[0576] -Option 1: Utilize i 1,3 The existing table of mappings to k1 and k2.

[0577] - Option 2: Define the antenna settings for i 1, 3 A new table mapping to k1 and k2. In this table, i 1,3 The value can range from 0 to 3, or it can be extended to 0 to 7.

[0578] 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 options.

[0579] -Option 1: Utilize i 1, 3 The existing table of mappings to k1 and k2.

[0580] - Option 3: Define the antenna settings for i 1,3 A new table mapping to k1 and k2. In this table, i 1,3 The value can range from 0 to 3, or it can be extended to 0 to 7.

[0581] Option 2 / 3 may also follow at least one of the following principles.

[0582] The multiple candidate values ​​for -k1 are {0, O1, 2O1, 3O1, ..., (N1-1)}. For O1}, the multiple candidate values ​​for k2 are {0, O2, 2O2, 3O2, ..., (N2-1)}. O2}.

[0583] - For an antenna setting where N2=1, k2=0.

[0584] -For antenna settings where N1=N2, i 1,3 Consider combinations of candidate k1 and k2 that utilize the same number as k1 and k2.

[0585] -For antenna settings where N1=N2, i 1,3 Consider using a combination of k1 and k2 that has more candidates than k2.

[0586] Figure 37 This indicates i for a 64-CSI-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 38 This indicates i for a 64-CSI-RS port. 1,3Another example of the mapping to k1 and k2. In this example, i 1,3 The value ranges from 0 to 7.

[0587] For a specific rank i 1,3 The report indicates that the beams differ for different layers, which can be selected / reported by the UE.

[0588] When i is not supported for a specific rank 1,3 In the case of a report, it is also possible to select different beams for different layers.

[0589] In the absence of support for i of rank 5, 6, 7, 8 1,3 In this case, the codebook can also follow at least one of the following options.

[0590] - Option 1: Regarding beam selection for different layers, reuse / carry over the existing codebook.

[0591] - Option 2: Define a new codebook for beam selection of different layers.

[0592] In the absence of support for i with rank 2, 3, 4 1,3 In such cases, the codebook can also follow the following options.

[0593] - Option 3: Define a new codebook for beam selection of different layers.

[0594] In option 2 / 3, the definition of beam selection offset (e.g., k1, k2) for different layers can also follow at least one of the following options.

[0595] - Option 1: Beam selection offset can be defined for a specific number of CSI-RS ports, or it can be defined for all CSI-RS ports.

[0596] - Option 2: Beam selection offset can be defined for specific antenna settings (n1-n2 or ng-n1-n2 or ng1-ng2-n1-n2) or it can be defined for all antenna settings.

[0597] - Option 3: Beam selection offset can also follow a combination of options 1 and 2.

[0598] In option 1 for ranks 5, 6, 7, and 8, the precoding matrix W can also be provided by the following formula.

[0599]

[0600] In option 3, which is for rank 2, 3, and 4, the precoding matrix W can also be provided by the following formula.

[0601]

[0602]

[0603] Here, l' and m' can be obtained by l'=i 1,1 +O1 and m'=i 1,2 It can be provided, or it can be provided through l'=i 1,1 and m'=i 1,2 +O2 can be used, or l'=i 1,1 +O1 and m'=i 1,2 +O2 is provided. 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.

[0604] In option 2 / 3, the precoding matrix can be changed to change layers with the same SD beam. In option 2, the precoding matrix can be changed to change beams with the same SD beam. For example, in the precoding matrix for rank 5 and codebookMode=1-2, layers 1 and 2 select / report the same beam, layers 3 and 4 select / report the same beam, and layer 5 selects / reports other beams. In option 2, the precoding matrix can be changed to change the relationship between the layer and the beam.

[0605] In option 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''.

[0606] Implementation Method D2-2

[0607] The codebook mode (whether codebook mode 1 or 2 is supported / applied, or whether a dedicated codebook design is supported / applied for codebook modes 1 and 2) can be defined in the specification or set via RRC.

[0608] The codebook mode can also be applied according to at least one of the following options.

[0609] - Option 1: Codebook mode can be applied to a specific rank, or it can be applied to all ranks together.

[0610] - Option 2: Codebook mode can be applied to a specific number of CSI-RS ports, or it can be applied to all CSI-RS ports.

[0611] - 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 together.

[0612] - Option 4: Codebook mode can also follow two or more combinations from options 1 to 3.

[0613] In the case of supporting codebook mode 2 for rank 1-2, codebook mode 2 may also follow at least one of the following options.

[0614] - Option 1: Reuse / adapt existing codebook design.

[0615] - Option 2: Support new codebook designs with different granularities accompanied by i2. This granularity can include granularities larger than the existing granularity, or it can include granularities smaller than the existing granularity.

[0616] When codebook mode 2 is supported for rank 3-8, codebook mode 2 can also follow the following options.

[0617] - Option 3: Support new codebook design.

[0618] In options 2 / 3, the codebook (especially i2) can also follow at least one of the following options.

[0619] - Option 1: The codebook can be defined for a specific rank, or it can be defined for all ranks.

[0620] - Option 2: The codebook can be defined for a specific number of CSI-RS ports, or it can be defined for all CSI-RS ports.

[0621] - Option 3: The codebook is defined for specific antenna settings (n1-n2 or ng-n1-n2 or ng1-ng2-n1-n2), or it can be defined for all antenna settings.

[0622] - Option 4: The codebook can also follow more than two combinations from options 1 to 3.

[0623] Figure 39 This represents an example of the codebook involved in option 1 for rank 1 and codebook mode 2. This codebook reuses / carries over the existing rank 1 codebook mode 2. For rank 1 using the existing codebook mode 2, 4 bits are required for i2. Each subband contains a combination of 4 phase difference selections and 4 beam selections.

[0624] Figure 40This represents an example of the codebook involved in option 1 for rank 2 and codebook mode 2. This codebook reuses / carries over existing rank 2 codebook mode 2. For rank 1 using existing codebook mode 2, 3 bits are required for i2. Each subband contains a combination of 2 phase difference selections and 4 beam selections.

[0625] Regarding option 2 concerning the codebook for rank 1 and codebook mode 2, the codebook for rank 1 and codebook mode 2 involved in option 1 includes i2 with a smaller granularity than the existing granularity. In this example, 3 bits are required for i2. The codebook may also follow at least one of the following options.

[0626] - Option 2a: This codebook contains a combination of 4 phase difference selections and 2 beam selections per subband. In this example, the 8 values ​​of i2 (0-8) can also be supported.

[0627] - Option 2b: This codebook contains a combination of 2 phase difference selections and 4 beam selections per subband. In this example, 8 values ​​for i2 {0, 1, 4, 5, 8, 9, 12, 13} can also be supported.

[0628] Option 2, concerning the codebook for rank 2 and codebook mode 2, includes i2 with a smaller granularity than the existing codebook for rank 2 and codebook mode 2, as described in option 1. In this example, 2 bits are required for i2. The codebook can also follow several other options.

[0629] - Option 2c: This codebook contains a combination of 2 phase difference selections and 2 beam selections per subband. In this example, the four values ​​of i2, 0-3, are also supported.

[0630] Figure 41 This represents an example of a codebook for rank 3 and codebook mode 2, as per option 3. In this example, 3 bits are required for i2. The codebook may also follow at least one of the following options.

[0631] - Option 3a: This codebook contains a combination of 4 phase difference selections and 2 beam selections per subband.

[0632] -Option 3b: This codebook contains a combination of 2 phase difference selections and 4 beam selections per subband.

[0633] - Option 3c: This codebook contains a combination of 2 phase difference selections and 2 beam selections per subband.

[0634] Implementation Method D2-3

[0635] Whether or not the codebook structure A / B in D3 is supported can be specified in the specification or set via RRC.

[0636] The codebook structure can also be applied according to at least one of the following options.

[0637] - Option 1: The codebook structure can be applied to a specific rank, or it can be applied to all ranks together.

[0638] - Option 2: The codebook structure can be applied to a specific number of CS-RS ports, or it can be applied to all CS-RS ports.

[0639] - 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.

[0640] - Option 4: The codebook structure can follow two or more combinations from options 1 to 3.

[0641] In cases where codebook structure B with rank 3 or 4 accompanied by CS-RS port number > 16 is supported, codebook structure B may also follow at least one of the following options.

[0642] - Option 1: Reuse / adapt existing codebook design.

[0643] -Option 2: Support for θ p A new codebook design with different granularities. This granularity can include granularities larger or smaller than the existing granularities.

[0644] If at least one of the other CSI-RS port numbers, other ranks, and other antenna settings supports codebook structure B, codebook structure B may also follow the following options.

[0645] - Option 3: Support new codebook design.

[0646] In the case of supporting codebook structure B, the additional phase difference across multiple port groups can be achieved through i 1,3 Alternatively, it can be represented (reported) using a new codebook index. Multiple port groups can be 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 added phase difference can be represented by i 1,3 It is used to represent, and is only applied to ranks 3 and 4.

[0647] Option 1 can reuse / carry over the existing codebooks for rank 3 and 4 (with more than 16 CSI-RS ports). 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, the phase difference is considered using two port groups.

[0648] In option 2 / 3, the phase difference between 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 with at least one of a specific rank, a specific number of CSI-RS ports, and a specific 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 / 2 For example, it can also support adding eight values ​​for the phase difference: {0, 1, 2, 3, 4, 5, 6, 7}. Here, θ p =e jπp / 8 In structure B of analysis D3, the precoder v can be the same or different for different layers. The phase difference φ can be present, absent, or -φ for different layers.

[0649] In option 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 using the new codebook index, or they can be reported together. The three parameters can 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 be provided by the following formula.

[0650]

[0651] Implementation Method D2-4

[0652] For specific CSI-RS port numbers and specific rank, different antenna settings can also be defined in the specification to support the same codebook or different codebooks (e.g., the range of beam selection), or can be set via RRC.

[0653] The codebook can also be applied according to at least one of the following options.

[0654] - Option 1: A specific codebook can be applied to a specific rank, or it can be applied to all ranks.

[0655] - Option 2: A specific codebook can be applied to a specific number of CSI-RS ports, or it can be applied to all CSI-RS ports.

[0656] - 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 together.

[0657] - Option 4: The codebook can follow two or more combinations from options 1 to 3.

[0658] The differences in codebooks for different antenna settings can also follow at least one of the following options.

[0659] -Option 1: i 1,2 It can be left unreported, or... 1,2 =0. This option can be applied to the case where N²=1, or to the case where N... g2 The case where N = 1 and N2 = 1.

[0660] -Option 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, or from 0, 1, ..., N1O1 / 2–1, or from 0, 1, ..., N2O2 / 4–1.

[0661] -Option 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, or from 0, 1, ..., N2O2 / 2–1, or from 0, 1, ..., N2O2 / 4–1.

[0662] According to this implementation, for CSI-RS utilizing more than 32 ports, an appropriate codebook can be reported.

[0663] <Type 1 Multi-panel Codebook>

[0664] The specification defines the codebook (relationship between precoding matrix and codebook index) used for Level 1 CSI reporting and codebook mode 1. Figure 42 ).

[0665] The specification defines the codebook used for Level 2 CSI reporting and codebook mode 1. Figure 43Similar to the Type 1 single-panel codebook, 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. As mentioned before, k1 and k2 are based on i reported by the UE. 1,3 That's for you to decide.

[0666] The specification defines the codebook used for 3-level CSI reporting and codebook mode 1. Figure 44 The precoding matrix for the second layer uses the same format as the precoding matrix for the first layer. The precoding matrices for both the first and second layers are identical. The precoding matrix for the third layer uses a different format than the precoding matrices for the first and second layers. The beamforming for the second layer is determined by l' and m'. l' and m' are determined by i. 1,3 Report back. The beamforming for the third layer is the same as that for the first layer.

[0667] The specification defines the codebook used for Level 4 CSI reporting and codebook mode 1. Figure 45 The precoding matrix for the fourth layer uses the same format as the precoding matrix for the third layer. The beamforming for both the second and fourth layers is determined by l' and m'. l' and m' are determined by i... 1,3 Report back. The beamforming for the third layer is the same as that for the first layer.

[0668] The specification defines the codebook used for Level 1 CSI reporting and codebook mode 2. Figure 46 ). [i 1,4,1 i 1,4,2 [Different from codebook mode 1.] 2,0 i 2,1 i 2,2 This is different from codebook mode 1.

[0669] The specification defines the codebook used for Level 2 CSI reporting and codebook mode 2. Figure 47 Similar to the Type 1 single-panel codebook, the beamforming 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 used to determine this. As mentioned earlier, k1 and k2 are based on i reported by the UE. 1,3 That's for you to decide.

[0670] The specification defines the codebook used for 3-level CSI reporting and codebook mode 2. Figure 48The precoding matrix for the second layer uses the same format as the precoding matrix for the first layer. The precoding matrices for both the first and second layers are identical. The precoding matrix for the third layer uses a different format than the precoding matrices for the first and second layers. The beamforming for the second layer is determined by l' and m'. l' and m' are determined by i. 1,3 Report back. The beamforming for the third layer is the same as that for the first layer.

[0671] The specification defines the codebook used for Level 4 CSI reporting and codebook mode 2. Figure 49 The precoding matrix for the fourth layer uses the same format as the precoding matrix for the third layer. The beamforming for both the second and fourth layers is determined by l' and m'. l' and m' are determined by i... 1,3 Report back. The beamforming for the third layer is the same as that for the first layer.

[0672] For CSI-RS utilizing more than 32 ports, CSI / codebooks based on Rel. 15 Type 1 Multipanel CSI (Type 1 Multipanel Codebook) have not been adequately studied.

[0673] <Implementation Method E1>

[0674] Antenna settings for enhanced CSI-RS (CSI-RS utilizing more than 32 ports) (e.g., ng-n1-n2 or ng1-ng2-n1-n2 in implementation C1) differ from antenna settings for existing CSI-RS (CSI-RS utilizing fewer than 32 ports). For enhanced CSI-RS, the type 1 multi-panel codebook for antenna settings can be defined in the specification or set via RRC signaling according to UE capabilities.

[0675] When supporting / setting type 1 multi-panel codebooks for enhanced CSI-RS, support for at least one of ranks 5 to 8 and a specific range of ranks can be defined in the specification, or it can be set via RRC signaling based on UE capabilities. For example, the specific range of ranks can be ranks 1 to 4, or ranks 1 and 2.

[0676] When supporting / setting type 1 multi-panel codebooks for enhanced CSI-RS, specific codebook modes (codebook mode 1, 2, or a new codebook mode) can be defined in the specification, or they can be set via RRC signaling based on UE capabilities. Different codebook modes can be defined using different codebook structures, or different methods can be considered for determining / calculating phase differences across multiple panels / polarities.

[0677] The definition / setting of a Type 1 multi-panel codebook for at least one of the following three options—Antenna settings for enhanced CSI-RS, rank of enhanced CSI-RS and a specific range, and enhanced CSI-RS and a specific codebook mode—can also be applied according to at least one of the following options.

[0678] Option 1: This definition / setting can be applied to a specific rank or to all ranks. For example, this definition / setting can also be applied to a subset of multiple ranks.

[0679] Option 2: This definition / setting can be applied to a specific number of CSI-RS ports, or it can be applied to all CSI-RS ports. For example, this definition / setting can also be applied to more than X number of CSI-RS ports.

[0680] Option 3: This definition / setting 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. For example, this definition / setting can also be applied to cases where N1≥X or N2≥Y or N1≥N2 or N2=Y.

[0681] - Option 4: This definition / setting can also follow two or more combinations from options 1 to 3.

[0682] According to this implementation, the UE can appropriately utilize the codebook for enhanced CSI-RS.

[0683] <Implementation Method E2>

[0684] It can also be done by extending i 1,1 i 1,2 i2, i 1,4 and i 1,3 At least one of the feedback values ​​and at least one of the bit numbers, rank 1 to 4, are used to enhance the existing type 1 multipanel codebook design of existing CSI-RS to enhance CSI-RS.

[0685] In addition to codebook modes 1 and 2, new codebook modes (e.g., codebook mode 1.5) can also be defined. For different antenna settings (ng-n1-n2 or ng1-ng2-n1-n2), the supported / configurable codebook modes (structures) can also follow at least one of the following modes.

[0686] - Codebook Mode 1: Reports broadband phase differences between multiple panels and sub-band phase differences between multiple polarizations. For N g Each panel, broadband phase difference i 1,4 The quantity can also be N g -1.

[0687] - Codebook Mode 1.5: Reports the broadband phase difference of other panels relative to the first panel for each polarization, and the sub-band phase difference between multiple polarizations for each panel or for multiple panels. For N g Each panel, broadband phase difference i 1,4 The quantity can also be 2 (N) g -1) or N g -1. The number of sub-band phase differences i2 can also be 1 or N for each sub-band. g .

[0688] - Codebook Mode 2: Reports the broadband phase difference of other panels relative to the first panel for each polarization, as well as the sub-band phase difference between multiple polarizations. For N g Each panel, broadband phase difference i 1,4 The quantity can also be 2 (N) g -1). The number of sub-band phase differences i2 can also be 2 for each sub-band. (N) g -1).

[0689] When N g In cases where the rank is small, or when the rank is small, codebook mode 2 can also be supported. When N g In cases where the value is large, or when the rank is large, codebook mode 1 can also be supported. When N g For moderate cases, codebook mode 1.5 can also be considered. More than one codebook mode can also be supported for at least one of the following: specific antenna settings, specific rank, and specific number of CSI-RS ports.

[0690] For layer 1 and the number of panels N g And the precoding matrix W of the codebook mode. l,m,p,n 1,n_g,mode (Codebook structure) can also follow at least one of the following examples.

[0691] Example 1: Codebook patterns 1 and N g A precoding matrix of 4 can also be provided by the following formula.

[0692]

[0693] Here, W φ,2 W φ,3 and W φ,4 It refers to the broadband phase difference between multiple panels (the phase difference of the second panel relative to the first panel, the phase difference of the third panel relative to the first panel, and the phase difference of the fourth panel relative to the first panel), which can be expressed by i. 1,4To represent this, φ is the phase difference between multiple polarizations, which can also be broadband or subband, and can be expressed by i. 1,2 To express.

[0694] Example 2A: The codebook mode 1.5 / case A and the precoding matrix with Ng=4 can be provided by the following formula.

[0695]

[0696] Here, W φ,2,1 W φ,2,2 W φ,3,1 W φ,3,2 W φ,4,1 W φ,4,2 It can also be 2(N) between multiple panels and multiple polarizations. g -1) A broadband phase difference (the phase difference between the second panel and the first polarization relative to the first panel and the first polarization, the phase difference between the second panel and the second polarization relative to the first panel and the first polarization, the phase difference between the third panel and the first polarization relative to the first panel and the first polarization, the phase difference between the third panel and the second polarization relative to the first panel and the first polarization, the phase difference between the fourth panel and the first polarization relative to the first panel and the first polarization, and the phase difference between the fourth panel and the second polarization relative to the first panel and the first polarization). φ can also be a broadband / subband phase difference.

[0697] Example 2B: The codebook mode 1.5 / case B and the precoding matrix with Ng=4 can be provided by the following formula.

[0698]

[0699] Here, W φ,2,1 W φ,2,2 W φ,3,1 W φ,3,2 W φ,4,1 W φ,4,2 It can also be a combination of multiple panels and multiple polarizations. (N) g -1) Wideband phase differences (phase difference between the second panel and the first polarization relative to the first panel and the first polarization, phase difference between the second panel and the second polarization relative to the first panel and the first polarization, phase difference between the third panel and the first polarization relative to the first panel and the first polarization, phase difference between the third panel and the second polarization relative to the first panel and the first polarization, phase difference between the fourth panel and the first polarization relative to the first panel and the first polarization, phase difference between the fourth panel and the second polarization relative to the first panel and the first polarization). φ1, φ2, φ3, and φ4 can also be Ng wideband / subband phase differences.

[0700] Example 2C: The codebook mode 1.5 / case C and the precoding matrix for Ng=4 can be provided by the following formula.

[0701]

[0702] Here, W φ,2 W φ,3 W φ,4 It can also be between multiple panels (N) g -1) wideband phase differences (phase difference of the second panel relative to the first panel, phase difference of the third panel relative to the first panel, phase difference of the fourth panel relative to the first panel). φ1, φ2, φ3, and φ4 can also be Ng wideband / subband phase differences.

[0703] Example 3: The codebook mode 2 and the precoding matrix with Ng=4 can be provided by the following formula.

[0704]

[0705] Here, W φ,2,1 W φ,2,2 W φ,3,1 W φ,3,2 W φ,4,1 W φ,4,2 It can also be a combination of multiple panels and multiple polarizations. (N) g -1) Broadband phase differences (phase difference between the second panel and the first polarization relative to the first panel and the first polarization, phase difference between the second panel and the second polarization relative to the first panel and the first polarization, phase difference between the third panel and the first polarization relative to the first panel and the first polarization, phase difference between the third panel and the second polarization relative to the first panel and the first polarization, phase difference between the fourth panel and the first polarization relative to the first panel and the first polarization, phase difference between the fourth panel and the second polarization relative to the first panel and the first polarization). φ1, φ 2,1 φ 2,2 φ 3,1 φ 3,2 φ 4,1 and φ 4,2 It can also be (2) The phase difference of Ng-1) broadband / subband (the phase difference of the first panel and the second polarization relative to the first panel and the first polarization, the second panel and the first polarization relative to the first panel and the first polarization, the second panel and the second polarization relative to the first panel and the first polarization, the third panel and the second polarization relative to the first panel and the first polarization, the fourth panel and the first polarization relative to the first panel and the first polarization, the fourth panel and the second polarization relative to the first panel and the first polarization).

[0706] For layer 2 and the number of panels N g And the precoding matrix W of the codebook mode. l,m,p,n 2,n_g,mode (Codebook structure) can also follow at least one of the following examples. In each example, W... x,y W x,y,z φ x and φ x,y It can also be the same as the example in layer 1.

[0707] Example 1: Codebook patterns 1 and N g A precoding matrix of 4 can also be provided by the following formula.

[0708]

[0709] Example 2A: The codebook mode 1.5 / case A and the precoding matrix with Ng=4 can be provided by the following formula.

[0710]

[0711] Example 2B: The codebook mode 1.5 / case B and the precoding matrix with Ng=4 can be provided by the following formula.

[0712]

[0713] Example 2C: The codebook mode 1.5 / case C and the precoding matrix for Ng=4 can be provided by the following formula.

[0714]

[0715] Example 3: The codebook mode 2 and the precoding matrix with Ng=4 can be provided by the following formula.

[0716]

[0717] For antenna settings ng1-n1-n2, the order of inter-panel co-phasing reporting can be: first panel, second panel, ..., Nth panel. g The order of the panels.

[0718] For antenna settings ng1-ng2-n1-n2, the order of inter-panel co-phasing reports can be defined in the specification or set by providing an RRC IE. This definition / setting can also follow one of the following orders.

[0719] - Corresponding to N g1 The first and N within each g2The first panel within each, corresponding to N g1 The second and N within each g2 The first panel within each panel, ..., corresponds to N. g1 The Nth within each g1 1 and N g2 The first panel within each, corresponding to N g1 The first and N within each g2 The order of the second panel within each panel, ...

[0720] - Corresponding to N g1 The first and N within each g2 The first panel within each, corresponding to N g1 The first and N within each g2 The second panel within each panel, ..., corresponds to N. g1 The first and N within each g2 The Nth within each g2 One panel, corresponding to N g1 The second and N within each g2 The order of the first panel within each panel, ...

[0721] According to this implementation, the UE can utilize an appropriate Type 1 multi-panel codebook for enhanced CSI-RS.

[0722] <Implementation Method E3>

[0723] For several codebook patterns in implementation E2, the inter-panel phase difference W φ,2 (i 1,4 The inter-polarization phase difference φ(i2), candidate values ​​used for reporting, and granularity can also follow at least one of the following definitions.

[0724] -Codebook Mode 1: i 1,4 The quantity is (N) g -1). i 1,4 = i 1,4,q , q=1, …… , N g -1. The number of i2 is 1, and it is 1 per subband when subband reporting is set.

[0725] -Codebook mode 1.5 / Case A: i 1,4 The quantity is 2 (N) g -1). i 1,4 = i 1,4,q , q=1, …… , 2(N) g -1). The number of i2 is 1, and it is 1 per sub-band when sub-band reporting is set.

[0726] -Codebook Mode 1.5 / Case B: i 1,4 The quantity is 2 (N) g -1). i 1,4 = i 1,4,q , q=1, …… , 2(N) g -1). The number of i2 is Ng, and with subband reporting set, it is N per subband. g i2 = i 2,q , q=1, …… ,(N g -1).

[0727] -Codebook mode 1.5 / Case C: i 1,4 The quantity is (N) g -1). i 1,4 = i 1,4,q , q=1, …… ,(N g -1). The number of i2 is Ng, and with subband reporting set, it is N per subband. g i2 = i 2,q , q=1, …… ,(N g -1).

[0728] -Codebook Mode 2: i 1,4 The quantity is 2 (N) g -1). i 1,4 = i 1,4,q , q=1, …… , 2(N) g -1). The number of i2 is Ng, and when subband reporting is set, it is (2N) per subband. g -1). i2= i 2,q , q=1, …… ,(2N) g -2).

[0729] -i 1,4 The set of candidate values ​​can also be {0,1,2,3} (2 bits), {0,1} (1 bit, coarser granularity), or {0,1,2,3,4,5,6,7} (3 bits, finer granularity).

[0730] The set of candidate values ​​for -i2 can also be {0,1,2,3} (2 bits), {0,1} (1 bit, coarser granularity), or {0,1,2,3,4,5,6,7} (3 bits, finer granularity).

[0731] -Regarding the application i 1,4The granularity (set of candidate values) of / i2 can be defined in the specification or set via RRC IE. This granularity (set) can also follow at least one of the following definitions / settings.

[0732] --This granularity (the set of candidate values) can be defined / set for a specific number of CSI-RS ports (per CSI-RS port) or it can be defined / set commonly for all CSI-RS ports.

[0733] --This granularity (the set of candidate values) can be defined / set for specific antenna settings (per antenna setting) or it can be defined / set jointly for all antenna settings.

[0734] --This granularity (the set of candidate values) can be defined / set for a specific rank (per rank) or it can be defined / set jointly for all ranks.

[0735] --This granularity (the set of candidate values) can be defined / set for a specific codebook pattern (per codebook pattern) or it can be defined / set commonly for all codebook patterns.

[0736] - For different panels, i 1,4 The granularity (the set of candidate values) can be different. For N g1 The i-panel of the dimension 1,4 The granularity (the set of candidate values) can also differ from that for N. g2 The i of the dimensional panel 1,4 Granularity (the set of candidate values).

[0737] - Regarding the granularity of i2 application (which set of candidate values), it can be defined / set by whether it is a wideband or a subband setting, or it can be defined / set for a specific number of subbands.

[0738] -Considering i 2,0 Corresponding to the first panel, i 2,0 and i 2,q The granularity (set of candidate values) for q=1,2,… can be different, i 2,0 It can also have a finer granularity. It can also be applied to i 2,q Consider different granularities, q=1,2,…

[0739] According to this implementation, the UE can utilize appropriate granularity / candidate values ​​of the type 1 multi-panel codebook for enhanced CSI-RS.

[0740] <Implementation Method E4>

[0741] When the enhanced CSI-RS type 1 multipanel codebook supports rank 5 to 8, a new codebook can also be defined.

[0742] For codebook mode 1 and rank 5 codebooks, at least one of the following options can also be followed.

[0743] - Option 1: The fifth layer has the same (SD) beam as one of the first through fourth layers.

[0744] - Option 2: The fifth layer has a different / new (SD) beam than one of the first through fourth layers.

[0745] - For beams in layers one through five, at least one of the following options can also be applied.

[0746] --Option 1: Beam offsets for different layers can also be defined in the specification. Beam offsets for different layers can also be defined in the specification as in existing Type 1 single-panel codebooks. For example, the formulas for l' / l'' relative to l and m' / m'' relative to m can be defined in the specification.

[0747] --Option 2: Beam offset for different layers can be achieved via i 1,3 The UE reports this. In this case, as in implementation D2-1, different antenna settings can also be defined in the specification for i. 1,3 A new table mapping to k1 and k2.

[0748] - The definition / report of option 1 or 2 may also follow at least one of the following definitions / reports.

[0749] --This definition / report can be defined / reported for a specific number of CSI-RS ports (per CSI-RS port), or it can be defined / reported collectively for all CSI-RS ports.

[0750] --This definition / report can be defined / reported for a specific antenna setting (per antenna setting), or it can be defined / reported collectively for all antenna settings.

[0751] --This definition / report can be defined / reported for a specific rank (by each rank), or it can be defined / reported jointly for all ranks.

[0752] For a 5-layer precoding matrix, at least one of the following examples can also be followed.

[0753] Example 1 (Option 1): The precoding matrix for the fifth layer is accompanied by the same (SD) beam as a specific layer (e.g., the first layer). The precoding matrix for the fifth layer can also be provided by the following formula.

[0754]

[0755] In option 1 and option 2, in this example, different layers can be selected using i. 1,3 This is used to report beam offset. The codebook can also be provided using the following formula.

[0756]

[0757] Example 2 (Option 1): The precoding matrix for the fifth layer is accompanied by a different (SD) beam than that for the first to fourth layers. The precoding matrix for the fifth layer can also be provided by the following formula.

[0758]

[0759] In both Option 2 and Option 1, beam offsets can be defined for different layers. The codebook can then be provided using the following formula.

[0760]

[0761] Here, i 1,1 =l={0,1,...,N1O1-1}、i 1,2 =m={0,1,...,N2O2-1}. For q=1,...,N g -1, i 1,4,q =p={0,1,2,3}. i2=n={0,1}.

[0762] Codebook designs for rank 6 to 8 can be the same as for rank 5. For example, beam offsets for different layers can be defined in the specification or via i 1,3 Reported by UE.

[0763] The codebook design for codebook mode 2 or 1.5 with ranks 5 to 8 can be the same as the codebook design for codebook mode 1. The granularity of the phase difference across multiple panels / polarizations in codebook mode 2 or 1.5 can also be different from the granularity in codebook mode 1.

[0764] The precoding matrix for 6 layers and codebook mode 1 can also be provided by the following formula.

[0765]

[0766] In option 1, the beam offset for different layers can be defined in the specification. The codebook can also be provided using the following formula.

[0767]

[0768] The precoding matrix for 7 layers and codebook mode 1 can also be provided by the following formula.

[0769]

[0770] In option 1, the beam offset for different layers can be defined in the specification. The codebook can also be provided using the following formula.

[0771]

[0772] The precoding matrix for 8 layers and codebook mode 1 can also be provided by the following formula.

[0773]

[0774] In option 1, the beam offset for different layers can be defined in the specification. The codebook can also be provided using the following formula.

[0775]

[0776] In option 1, from i 1,3 The mapping to k1 and k2 can also follow implementation method D2-1.

[0777] According to this implementation, the UE can utilize an appropriate type 1 multi-panel codebook for ranks 5 to 8.

[0778] <Analysis E0>

[0779] Referring to existing Type 1 single-panel codebooks for ranks 5 to 8, to reduce complexity, the sub-band phase difference between multiple polarizations does not need to be considered for several layers. In existing Type 1 single-panel codebooks for rank 5, the phase difference between multiple polarizations is considered only for the first and second layers. In existing Type 1 single-panel codebooks for rank 6, the phase difference between multiple polarizations is considered only for the first to fourth layers. In existing Type 1 single-panel codebooks for rank 7, the phase difference between multiple polarizations is considered only for the first to third layers. In existing Type 1 single-panel codebooks for rank 8, the phase difference between multiple polarizations is considered only for the first to fourth layers.

[0780] <Implementation Method E5>

[0781] This implementation involves analyzing E0.

[0782] In a Type 1 multi-panel codebook with enhanced CSI-RS and a rank greater than r and more than one layer, the phase difference between multiple polarizations for the more than one layer may also be disregarded. The precoding matrices for the more than one layer in codebook modes 1 and 2 may also follow at least one of the following examples.

[0783] Example 1: For codebook pattern 1 and N g =2, 4, and layers 3 and 4, the phase difference φ between multiple polarizations can also be disregarded. n At this point, the precoding matrices for layers 3 and 4 can also be provided using the following formula.

[0784]

[0785] Example 2: For codebook pattern 2 and N g =2 and layers 3 and 4, the phase difference φ between multiple polarizations can also be disregarded. n b n At this point, the precoding matrices for layers 3 and 4 can also be provided using the following formula.

[0786]

[0787] The codebook design of rank 5 to 8 and codebook mode 1 in implementation E3 can also be updated to disregard the phase difference between multiple polarizations for more than one layer.

[0788] The precoding matrix for 5 layers and codebook mode 1 can also be provided by the following formula. For layers 3 to 5, there may not be a phase difference between multiple polarizations.

[0789]

[0790] For a 6-layer precoding matrix with codebook mode 1, the following formula can also be provided. For layers 5 and 6, there may also be no phase difference between multiple polarizations.

[0791]

[0792] The precoding matrix for 7 layers and codebook mode 1 can also be provided by the following formula. For layers 4 to 7, there may not be a phase difference between multiple polarizations.

[0793]

[0794] The precoding matrix for 8 layers and codebook mode 1 can also be provided by the following formula. For layers 5 to 8, there may not be a phase difference between multiple polarizations.

[0795]

[0796] For codebook designs of rank 5 to 8 and codebook mode 2 or 1.5, they can also be modified to be the same as codebook mode 1. The granularity of the phase difference across multiple panels / multiple polarizations in codebook mode 2 or 1.5 can also be different from the granularity in codebook mode 1.

[0797] According to this implementation, the complexity / overhead of the Type 1 multipanel codebook is suppressed.

[0798] <Implementation Method 6>

[0799] This implementation involves analyzing D1.

[0800] In the case of supporting rank 1 to 4 for the type 1 multipanel codebook of enhanced CSI-RS, its codebook may also follow at least one of the following options.

[0801] -Option 1: Support i for ranks 2, 3, and 4 1,3 In this case, it can also be used for i 1,3 The existing table of mappings to k1 and k2.

[0802] -Option 2: Support i for ranks 2, 3, and 4 1,3 In this case, different antenna settings can also be defined for i 1,3 A new table mapping to k1 and k2. Similar to implementation D2-1, i 1,3 The value can be maintained in the range of 0 to 3, or it can be extended to 0 to 7.

[0803] -Option 3: In cases where i is not supported 1,3 In the same case as in implementation D2-1, a new codebook for beam selection of different multiple layers can also be defined. For example, the formula for l' / l'' for l and the formula for m' / m'' for m can also be defined in the specification.

[0804] Do I need i? 1,3 The report definition / settings can also be applied according to at least one of the following options.

[0805] Option 1: Do you need i? 1,3 The definition / setting of a report can be applied to a specific rank, or it can be applied 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.

[0806] Option 2: Do you need i? 1,3 The report definition / settings can be applied to a specific number of CSI-RS ports, or they can be applied 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.

[0807] Option 3: Do you need i? 1,3The report's definitions / settings can be applied to specific antenna settings (n1-n2 or ng-n1-n2 or ng1-ng2-n1-n2), or they can be applied to all antenna settings together. For example, whether i is required... 1,3 The definition / setting of the report can also be applied to the cases where N1≥X or N2≥Y or N1≥N2 or N2=Y.

[0808] Option 4: Do you need i? 1,3 The definition / setting of the report can also follow a combination of two or more of options 1 to 3.

[0809] According to this implementation, the UE can appropriately determine i in the Type 1 multi-panel codebook of enhanced CSI-RS. 1,3 The presence or absence of content.

[0810] <Supplement>

[0811] [Information notification to UE]

[0812] The notification of any information from the Network (NW) (e.g., Base Station (BS)) to the UE in the above-described embodiments (in other words, the reception of any information from the BS in the UE) can also be performed 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.

[0813] 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) in the MAC subheader that is not specified in the existing standard.

[0814] 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.

[0815] Furthermore, the notification of any information to the UE in the above embodiments can also be carried out periodically, semi-persistently, or non-periodically.

[0816] [Notification from UE]

[0817] The notification of any information from the UE (to the NW) in the above embodiments (in other words, the transmission / reporting of any information from the UE to the BS) 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.

[0818] In the case where the above notification is delivered via MAC CE, the MAC CE can also be identified by including a new LCID in the MAC sub-header that is not specified in the existing standard.

[0819] In cases where the above notification is sent via UCI, the above notification may also be sent using PUCCH or PUSCH.

[0820] Furthermore, the notification of any information from the UE in the above embodiments can also be carried out periodically, semi-persistently, or non-periodically.

[0821] [Regarding the application of each implementation method]

[0822] At least one of the above-described implementation methods can also be applied under certain conditions. These specific conditions can be specified in the standard or communicated to the UE / BS using higher-layer signaling / physical layer signaling.

[0823] At least one of the above implementation methods may also be applied only to UEs that have reported a specific UE capability or support that specific UE capability.

[0824] This specific UE capability can also represent at least one of the following:

[0825] • Supports specific processing / operation / control / information for at least one of the above embodiments.

[0826] • Supports 48, 64, 72, 96 or 128 ports for CSI measurements.

[0827] • Supports the setting of at least one of (N1, N2) and (O1, O2) for more than 32 ports (48, 64, 72, 96 or 128 ports). The UE supports the setting of at least one of (N1, N2) and (O1, O2) for a certain codebook / CSI type.

[0828] • Supports setting at least one of ng-n1-n2 and (O1, O2) for more than 32 ports (48, 64, 72, 96, or 128 ports). Supports setting at least one of ng-n1-n2 and (O1, O2) for a codebook / CSI type.

[0829] • Supports setting at least one of ng1-ng2-n1-n2 and (O1, O2) for more than 32 ports (48, 64, 72, 96, or 128 ports). Supports setting at least one of ng1-ng2-n1-n2 and (O1, O2) for a codebook / CSI type.

[0830] • The UE supports rank-specific (O1, O2) or rank-common (O1, O2).

[0831] • Supports different (SD) beam selection for different layers, based on at least one of the following: rank, number of CSI-RS ports, antenna settings, and UE. The UE supports different defined / configured beams for different layers. To enable different beam selection for different layers, i... 1,3 The report.

[0832] • Supports codebook mode 1 or 2 based on at least one of the following: rank, number of CSI-RS ports, antenna settings, and UE.

[0833] • Supports codebook structure A or B based on at least one of rank, number of CSI-RS ports, antenna settings, and UE. Supports additional reporting of phase differences across multiple antenna ports / multiple port groups.

[0834] • Supports different ranges of (SD) beam selection based on rank, number of CSI-RS ports, antenna settings, and at least one of UE.

[0835] • Supports Type 1 single-panel codebook / Type 1 multi-panel codebook by at least one of the following: rank, number of CSI-RS ports, antenna settings, and UE.

[0836] • Supports at least one of the following based on rank, number of CSI-RS ports, antenna settings, and UE: Type 1 single-panel codebook, Type 1 multi-panel codebook, and specific codebook mode for a specific codebook type. For example, it supports specific codebook types with ranks 1 to 4. For example, it supports specific codebook types with ranks 5 to 8.

[0837] • Supports selection of different (SD) beams for different layers, based on at least one of rank, number of CSI-RS ports, antenna settings, and UE. Supports different beams defined for different layers. Supports i for selecting different beams for different layers. 1,3 The report.

[0838] • Supports inter-panel phase difference reporting, and the maximum number of reported phase difference values. For each panel, this maximum number is either common to both polarizations of a panel, or polarization-specific.

[0839] • By rank, number of CSI-RS ports, antenna settings, or at least one of UE, it supports omitting the phase difference between multiple polarizations for a specific layer.

[0840] • The phase difference between the reported multiple polarizations is either common to all panels or panel / polarization specific.

[0841] Furthermore, the aforementioned specific UE capabilities can be capabilities applied across the entire frequency range (commonly independent of frequency), capabilities for each frequency (e.g., one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), capabilities for each frequency range (e.g., Frequency Range 1 (FR1)), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities for each subcarrier spacing (SCS) or capabilities for each feature set (FS) or each feature set per component carrier (FSPC).

[0842] 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)).

[0843] Furthermore, at least one of the above-described embodiments can also be applied when the UE is set / activated / triggered by specific information associated with the above-described embodiments (or performs the operation of the above-described embodiments) via higher-layer signaling / physical layer signaling. For example, this specific information may be information indicating the activation of the operation of the above-described embodiments, arbitrary RRC parameters for a specific version (e.g., Rel.18 / 19), etc.

[0844] The UE may also apply operations such as Rel.15 / 16 if it does not support at least one of the specific UE capabilities mentioned above, or if the specific information mentioned above is not set.

[0845] (Postscript)

[0846] With respect to one embodiment of this disclosure, the following invention is noted.

[0847] [Postscript 1]

[0848] A terminal having:

[0849] The receiving unit receives settings for a Type 1 single-panel codebook utilizing Channel State Information (CSI) - Reference Signal (RS) using more than 32 ports; and

[0850] The control unit, based on the settings, controls the reporting of the precoding matrix indicator (PMI) based on the type 1 single-panel codebook.

[0851] [Postscript 2]

[0852] The terminal as described in Appendix 1, wherein,

[0853] The control unit determines whether the PMI includes the relationship between the beam index and the oversampling factor based on at least one of the rank, the number of CSI-RS ports, and the antenna settings.

[0854] [Postscript 3]

[0855] The terminal as described in Appendix 1 or Appendix 2, wherein,

[0856] The control unit selects multiple beams corresponding to each of the multiple layers.

[0857] [Postscript 4]

[0858] The terminal as described in any of Notes 1 to 3, wherein,

[0859] The control unit determines at least one of the following based on at least one of the following: rank, number of CSI-RS ports, and antenna settings: codebook mode, codebook structure, and beam selection range.

[0860] (Postscript)

[0861] With respect to one embodiment of this disclosure, the following invention is noted.

[0862] [Postscript 1]

[0863] A terminal having:

[0864] The receiving unit receives settings for Channel State Information (CSI) - Reference Signal (RS) utilizing more than 32 ports and Type 1 multi-panel codebooks of rank 4 or lower; and

[0865] The control unit, based on the settings, controls the reporting of the precoding matrix indicator (PMI) based on the type 1 multi-panel codebook.

[0866] [Postscript 2]

[0867] The terminal as described in Appendix 1, wherein,

[0868] The control unit reports control capability information, which indicates support for at least one of the antenna settings, rank, and codebook mode of the Type 1 multi-panel codebook.

[0869] [Postscript 3]

[0870] The terminal as described in Appendix 1 or Appendix 2, wherein,

[0871] The range of values ​​in the PMI is greater than the range of values ​​in the case of CSI-RS using ports of 32 or less.

[0872] [Postscript 4]

[0873] The terminal as described in any of Notes 1 to 3, wherein,

[0874] The setting indicates a codebook mode different from that used in CSI-RS with ports of 32 or less.

[0875] (Postscript)

[0876] With respect to one embodiment of this disclosure, the following invention is noted.

[0877] [Postscript 1]

[0878] A terminal having:

[0879] The receiving unit receives settings for Channel State Information (CSI) - Reference Signal (RS) utilizing more than 32 ports and a Type 1 multi-panel codebook with more than 4 rank; and

[0880] The control unit, based on the settings, controls the reporting of the precoding matrix indicator (PMI) based on the type 1 multi-panel codebook.

[0881] [Postscript 2]

[0882] The terminal as described in Appendix 1, wherein,

[0883] The type 1 multi-panel codebook differs from the codebook used in the case of CSI-RS with ports of 32 or less.

[0884] [Postscript 3]

[0885] The terminal as described in Appendix 1 or Appendix 2, wherein,

[0886] The PMI includes the phase difference between polarizations for more than one layer, but not the phase difference between polarizations for other layers.

[0887] [Postscript 4]

[0888] The terminal as described in any of Notes 1 to 3, wherein,

[0889] The control unit determines whether the PMI includes the relationship between the beam index and the oversampling factor based on at least one of the rank, the number of CSI-RS ports, and the antenna settings.

[0890] (Wireless communication system)

[0891] 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.

[0892] 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 (5GNR) as standardized by the Third Generation Partnership Project (3GPP).

[0893] 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.

[0894] 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.

[0895] 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))).

[0896] 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 and number of each cell and the user terminal 20 are not limited to the arrangement shown in the figure. Hereinafter, without distinguishing between base stations 11 and 12, they will be collectively referred to as base station 10.

[0897] 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).

[0898] 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 correspond to a frequency band higher than FR2.

[0899] In addition, user terminal 20 can also use at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) to communicate in each CC.

[0900] Multiple base stations 10 can also be connected via wired (e.g., fiber optic, X2 interface, etc. based on Common Public Radio Interface (CPRI)) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, 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.

[0901] 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.

[0902] 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.

[0903] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0904] 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.

[0905] 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.

[0906] 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.

[0907] 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.

[0908] 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.

[0909] 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.

[0910] 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.

[0911] 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.

[0912] A search space can also correspond to a PDCCH candidate corresponding 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.

[0913] 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.

[0914] Additionally, in this disclosure, downlink, uplink, etc., may be described without the word "link". Furthermore, it may be stated that the word "physical" is not included at the beginning of various channels.

[0915] 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).

[0916] 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.

[0917] 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).

[0918] (Base station)

[0919] Figure 51 This 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.

[0920] 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 have other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0921] The control unit 110 implements control of all base stations 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.

[0922] 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, sequences, etc., 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.

[0923] 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 can 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.

[0924] 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.

[0925] 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.

[0926] 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.

[0927] 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.

[0928] 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.

[0929] 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.

[0930] 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.

[0931] 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.

[0932] 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.

[0933] 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.

[0934] 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.

[0935] 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.

[0936] Additionally, the transmit / receive unit 120 can also transmit settings for a Type 1 single-panel codebook utilizing Channel State Information (CSI)-Reference Signal (RS) with more than 32 ports. The control unit 110 can also control the reception of reports based on the precoding matrix indicator (PMI) of the Type 1 single-panel codebook based on these settings.

[0937] Additionally, the transmit / receive unit 120 can also transmit settings for Channel State Information (CSI) - Reference Signal (RS) utilizing more than 32 ports and Type 1 multi-panel codebooks with ranks of 4 or less. The control unit 110 can also control the reception of reports based on the precoding matrix indicator (PMI) of the Type 1 multi-panel codebook based on these settings.

[0938] Additionally, the transmit / receive unit 120 can also transmit settings for channel state information (CSI)-reference signals (RS) utilizing more than 32 ports and a type 1 multi-panel codebook with more than 4 ranks. The control unit 110 can also control the reception of reports based on the precoding matrix indicator (PMI) of the type 1 multi-panel codebook based on these settings.

[0939] (User terminal)

[0940] 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, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided as one or more.

[0941] 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.

[0942] The control unit 210 implements control over all user terminals 20. The control unit 210 can be composed of controllers, control circuits, etc., described based on common knowledge in the technical field to which this disclosure pertains.

[0943] 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.

[0944] 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 a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0945] 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.

[0946] 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.

[0947] 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.

[0948] 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.

[0949] 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.

[0950] 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.

[0951] Furthermore, whether or not to apply DFT processing can be based on the settings of transform precoding. 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 in order to transmit the channel using the DFT-s-OFDM waveform. If not, the transmit / receive unit 220 (transmit processing unit 2211) can perform the above transmission processing without performing DFT processing.

[0952] 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.

[0953] 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.

[0954] 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 acquire user data.

[0955] 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.

[0956] 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, NZPCSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc., can also be interchanged.

[0957] 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.

[0958] The transmitting / receiving unit 220 can also receive settings for a Type 1 single-panel codebook utilizing Channel State Information (CSI)-Reference Signal (RS) with more than 32 ports. The control unit 210 can also control the reporting of precoding matrix indicators (PMIs) based on the settings.

[0959] The control unit 210 may also determine whether the PMI includes the relationship between the beam index and the oversampling factor based on at least one of the rank, the number of CSI-RS ports, and the antenna settings.

[0960] The control unit 210 can also select multiple beams corresponding to each of the multiple layers.

[0961] The control unit 210 may also determine at least one of the following: codebook mode, codebook structure, and beam selection range, based on at least one of the following: rank, number of CSI-RS ports, and antenna settings.

[0962] The transmit / receive unit 220 can also receive settings for Channel State Information (CSI) - Reference Signal (RS) utilizing more than 32 ports and Type 1 multi-panel codebooks with ranks of 4 or less. The control unit 210 can also control the reporting of precoding matrix indicators (PMIs) based on the settings.

[0963] The control unit 210 can also control the reporting of capability information, which indicates support for at least one of the antenna settings, rank, and codebook mode of the type 1 multi-panel codebook.

[0964] The range of values ​​in the PMI can also be greater than the range of values ​​in the case of CSI-RS using ports of 32 or less.

[0965] The settings can also represent a codebook mode different from the case of CSI-RS using ports below 32.

[0966] The transmitting / receiving unit 220 can also receive settings for Channel State Information (CSI) - Reference Signal (RS) utilizing more than 32 ports and Type 1 multi-panel codebooks with more than 4 ranks. The control unit 210 can also control the reporting of precoding matrix indicators (PMIs) based on the settings.

[0967] The type 1 multi-panel codebook may also differ from the codebook used in the case of CSI-RS with ports of 32 or less.

[0968] The PMI may also include inter-polarization phase differences for more than one layer, but not inter-polarization phase differences for other layers.

[0969] The control unit 210 may also determine whether the PMI includes the relationship between the beam index and the oversampling factor based on at least one of the rank, the number of CSI-RS ports, and the antenna settings.

[0970] (Hardware structure)

[0971] 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.

[0972] 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. Each of these, as described above, is not particularly limited in its implementation method.

[0973] 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 diagram illustrates 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, and a bus 1007.

[0974] 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.

[0975] 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.

[0976] Regarding the functions in base station 10 and user terminal 20, for example, by reading specific software (programs) into hardware such as processor 1001 and memory 1002, so that processor 1001 performs calculations and controls communication via communication device 1004, or by controlling at least one of reading and writing data in memory 1002 and storage device 1003.

[0977] The processor 1001 enables the operating system to operate and control the computer as a whole. The processor 1001 may also be 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.

[0978] 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.

[0979] 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.

[0980] Storage device 1003 may also be a computer-readable recording medium, such as a flexible disc, floppy disk, optical disk (e.g., a compact disc ROM), digital multifunction disk, Blu-ray disc, removable disk, hard disk drive, smart card, flash memory device (e.g., a card, stick, key drive), magnetic stripe, database, server, or at least one other suitable storage medium. Storage device 1003 may also be referred to as an auxiliary storage device.

[0981] 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).

[0982] 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).

[0983] 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.

[0984] 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.

[0985] (Modified example)

[0986] 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.

[0987] 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).

[0988] 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.

[0989] 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.

[0990] 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. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-time slot can also be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-time slots can also be called PDSCH (PUSCH) mapping type B.

[0991] 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.

[0992] 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.

[0993] 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.

[0994] 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.

[0995] 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 serve as 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.

[0996] 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.

[0997] 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.

[0998] 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.

[0999] 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.

[1000] 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.

[1001] 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.

[1002] 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 certain 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.

[1003] 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.

[1004] 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. Additionally, terms such as "cell" and "carrier" in this disclosure may be replaced with "BWP".

[1005] 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.

[1006] 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.

[1007] In this disclosure, the names used for parameters, etc., are not limiting names in any respect. Furthermore, the mathematical expressions, 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.

[1008] 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.

[1009] 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.

[1010] 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.

[1011] 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.

[1012] 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, the MAC control element (CE).

[1013] 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).

[1014] 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).

[1015] 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.

[1016] 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.

[1017] 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).

[1018] 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.

[1019] 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.

[1020] 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.

[1021] 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.

[1022] 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.

[1023] 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.

[1024] In this disclosure, indexes, identifiers (IDs), indicators, indications, resource IDs, etc., can be interchanged. Sequences, lists, sets, groups, clusters, subsets, etc., can also be interchanged.

[1025] Furthermore, the spatial relationship information Identifier (ID) (TCI state ID) and 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 relationships can also be interchanged.

[1026] 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.

[1027] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, its overall coverage area can be divided into several 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.

[1028] In this disclosure, the act of a base station sending information to a terminal can also be rewritten in relation to the act of the base station instructing the terminal to perform control / operation based on that information.

[1029] In this disclosure, the terms “Mobile Station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” are used interchangeably.

[1030] 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.

[1031] 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.

[1032] The term "mobile body" refers to a movable object whose speed is arbitrary, including when the object is stationary. Examples of such mobile bodies include vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships (ships and other watercraft), airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, hot air 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.

[1033] 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 also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station can also be an Internet of Things (IoT) device such as a sensor.

[1034] Figure 54 This is a diagram illustrating 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 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 shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[1035] 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 steering handle) that steers at least one of the front wheels 46 and the rear wheels 47 based on operation of the steering wheel by the user.

[1036] 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 to the electronic control unit 49. The electronic control unit 49 can also be referred to as an electronic control unit (ECU).

[1037] The signals from various sensors 50-58 include the following: current signal from current sensor 50 sensing the current of the motor; rotational speed signal of front wheel 46 / rear wheel 47 obtained by speed sensor 51; air pressure signal of front wheel 46 / rear wheel 47 obtained by air pressure sensor 52; vehicle speed signal obtained by vehicle speed sensor 53; acceleration signal obtained by acceleration sensor 54; accelerator pedal 43 depress amount signal obtained by accelerator pedal sensor 55; brake pedal 44 depress amount signal obtained by brake pedal sensor 56; shift lever 45 operation signal obtained by shift lever sensor 57; and detection signal obtained by object detection sensor 58 for detecting obstacles, vehicles, pedestrians, etc.

[1038] The information service unit 59 comprises various devices such as a navigation system, audio system, speakers, display, television, and radio, used to provide (output) various information such as driving information, traffic information, and entertainment information, and 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.

[1039] The information service unit 59 may include input devices (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) that accept input from the outside, and output devices (e.g., display, speaker, LED light, touch panel, etc.) that implement output to the outside.

[1040] The driver assistance system unit 64 comprises various devices used to provide functions for preventing accidents or reducing the driver's workload, such as millimeter-wave radar, light detection and ranging (LiDAR), cameras, positioning detectors (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, and one or more ECUs that control these devices. Furthermore, the driver assistance system unit 64 sends and receives various information via communication module 60 to realize driver assistance functions or autonomous driving functions.

[1041] 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) with 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, axles 48, microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49 of the vehicle 40, and various sensors 50-58 via the communication port 63.

[1042] The communication module 60 can be 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 with external devices via wireless communication. The communication module 60 can be located both inside and 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).

[1043] The communication module 60 can also wirelessly transmit at least one of the signals input to the electronic control unit 49 from the various sensors 50-58 described above, the information obtained based on these signals, and the information based on input from an external (user) source obtained via the information service unit 59 to an external device. 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 inputs.

[1044] The communication module 60 receives various information (traffic information, signal information, workshop information, etc.) sent from external devices and displays it on the vehicle's information service unit 59. 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 by the communication module 60 (or the data / information decoded from the PDSCH).

[1045] Furthermore, the communication module 60 stores various types of information received from external devices into a memory 62 that can be utilized by the microprocessor 61. Based on the information stored in the memory 62, 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, axles 48, and various sensors 50-58, etc., of the vehicle 40.

[1046] 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.

[1047] 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.

[1048] In this disclosure, operations are assumed to be performed by the base station, and sometimes, depending on the circumstances, by its upper node. In a network containing one or more network nodes having a base station, the various operations performed for communication with a terminal can obviously be performed by the base station, one or more network nodes other than the base station (e.g., considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or combinations thereof.

[1049] 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.

[1050] 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, where 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, modified, generated, or specified based on these methods. Furthermore, multiple systems can be combined (e.g., LTE or LTE-A, combinations with 5G, etc.) for application.

[1051] 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".

[1052] 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.

[1053] 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.

[1054] 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.

[1055] 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 actions as situations where a "judgment (decision)" is made. In this disclosure, "judgment (decision)" can also be rewritten in relation to the aforementioned actions.

[1056] Furthermore, in this disclosure, "determine / determining" can also be interchanged with "assume / assuming," "expect / expecting," "consider / considering," etc. Additionally, in this disclosure, "not assuming to proceed..." can also be interchanged with "assuming not to proceed..."

[1057] In this disclosure, "expect" can also be interchanged with "be expected." For example, "expect(s) ..." (where "..." can also be expressed using a that clause, to infinitive, etc.) can also be interchanged with "be expected ...." "Does not expect..." can also be interchanged with "be not expected...". Furthermore, "An apparatus A is not expected..." can also be interchanged with "Apparatus B other than apparatus A does not expect..." (for example, if apparatus A is a UE, apparatus B can also be a base station).

[1058] 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).

[1059] 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.”

[1060] 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.

[1061] 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."

[1062] 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.

[1063] 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.

[1064] In this disclosure, words such as "below," "less than," "above," "more," and "equal to" can be interchanged. Furthermore, in this disclosure, words meaning "good," "bad," "large," "small," "high," "low," "early," "late," "wide," and "narrow," etc., are not limited to the positive, comparative, and superlative degrees, and can be interchanged. Additionally, in this disclosure, words meaning "good," "bad," "large," "small," "high," "low," "early," "late," "wide," and "narrow," etc., as expressions with "i" appended (i being any integer), are not limited to the positive, comparative, and superlative degrees, and can be interchanged (for example, "highest" can also be interchanged with "i-th highest").

[1065] In this disclosure, "of", "for", "regarding", "related to", "associated with", etc., can also be rewritten interchangeably.

[1066] In this disclosure, phrases such as "when A, B", "if A, then B", "B upon A", "B in response to A", "based on A", "B during / while A", "before A", "at the same time as / on A", "after A", "since A", and "until A" can be rewritten interchangeably. Furthermore, A and B can be replaced with appropriate expressions such as nouns, gerunds, or ordinary sentences 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 when 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.

[1067] 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 overridden.

[1068] 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 channel state information-reference signals (CSI-RS) utilizing more than 32 ports and type 1 multi-panel codebooks of more than 4 rank; and The control unit controls the reporting of the precoding matrix indicator PMI based on the type 1 multi-panel codebook, according to the settings.

2. The terminal as described in claim 1, wherein, The type 1 multi-panel codebook differs from the codebook used in the case of CSI-RS with ports of 32 or less.

3. The terminal as described in claim 1, wherein, The PMI includes the phase difference between polarizations for more than one layer, but not the phase difference between polarizations for other layers.

4. The terminal as described in claim 1, wherein, The control unit determines whether the PMI includes the relationship between the beam index and the oversampling factor based on at least one of the rank, the number of CSI-RS ports, and the antenna settings.

5. A wireless communication method for a terminal, comprising: The steps for receiving the Channel State Information Reference Signal (CSI-RS) using more than 32 ports and the setting of a Type 1 multi-panel codebook with more than 4 rank; and According to the settings, the steps for controlling the reporting of the precoding matrix indicator PMI based on the type 1 multi-panel codebook are defined.

6. A base station, comprising: The transmitting unit transmits settings for channel state information (CSI-RS) using more than 32 ports and a type 1 multi-panel codebook with more than 4 rank; and The control unit, according to the settings, controls the reception of reports based on the precoded matrix indicator PMI of the type 1 multi-panel codebook.

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