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 a setting of a channel state information-reference signal (CSI-RS) using more than 32 ports; and a control unit that measures CSI on the basis of the setting, the setting represents at least one of the following: a combination of the number of antenna elements in the horizontal direction and the number of antenna elements in the vertical direction; the number of panels; a combination of the number of panels and the number of antenna elements in the horizontal direction and the number of antenna elements in the vertical direction; and the number of panels in the horizontal direction and the number of panels in the vertical direction. The number of antenna elements in the horizontal direction and the number of antenna elements in the vertical direction are combined.

Description

TECHNICAL FIELD

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

[0002] In a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized for the purpose of further high-speed data rates, low latency, and so on (Non-Patent Literature 1). Further, LTE-Advanced (3GPP Rel. 10-14) has been standardized for the purpose of further large capacity, higher, and so on of the Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9.

[0003] A subsequent system of LTE (for example, also referred to as a 5th generation mobile communication system (5G), 5G+, a 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 onwards, and so on) is also under study.

[0004] PRIOR ART DOCUMENTS

[0005] NON-PATENT LITERATURE

[0006] Non-Patent Literature 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

[0007] PROBLEMS TO BE SOLVED BY THE INVENTION

[0008] In a future wireless communication system (e.g., NR), it is being studied that a terminal (User Equipment (UE)) controls transmission and reception processing based on information about quasi co-location (Quasi-Co-Location (QCL)), transmission configuration indication (TCI) state, and a beam.

[0009] However, if a large number of periodic / semi-persistent channel state information-reference signals (CSI-RSs) are set in order to manage a large number of beams, there are concerns that this leads to a decrease in the efficiency of resource utilization, a decrease in throughput, and the like.

[0010] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that efficiently utilize CSI-RS resources.

[0011] Means for solving the problem

[0012] A terminal according to an aspect of the present disclosure includes a reception unit that receives a setting of a channel state information-reference signal (CSI-RS) using more than 32 ports, and a control unit that measures a CSI based on the setting, the setting indicating at least one of a combination of a number of horizontal antenna elements and a number of vertical antenna elements, a number of panels, the number of panels and the combination of the number of horizontal antenna elements and the number of vertical antenna elements, a number of horizontal panels and a number of vertical panels, and the combination of the number of horizontal antenna elements and the number of vertical antenna elements.

[0013] Effects of the Invention

[0014] According to an aspect of the present disclosure, it is possible to efficiently utilize CSI-RS resources. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a diagram illustrating an example of a CSI-RS position per port number.

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

[0017] Figure 3 FIG. 3 is a diagram illustrating an example of a CSI-RS position per port number.

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

[0019] Figure 5A and Figure 5B is a diagram showing an example of CSI-RS to which inter-PRB OCC is applied.

[0020] Figures 6A-6C is a diagram showing an example of inter-PRB OCC.

[0021] Figure 7A and Figure 7B is a diagram showing an example of repetition of old version CSI-RS and new version CSI-RS.

[0022] Figure 8 is a diagram showing an example of CSI-RS measurement operation of UE to which inter-PRB OCC is not set.

[0023] Figure 9 is a diagram showing an example of CSI-RS to which inter-slot OCC is applied.

[0024] Figure 10 is a diagram showing an example of existing CSI-RS resource and additional CSI-RS resource.

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

[0026] Figure 12 is a diagram showing an example of a case where at least one of time and frequency is different between existing CSI-RS resource and additional CSI-RS resource.

[0027] Figure 13 is a diagram showing an example of a case where at least one of sequence and scrambling ID is different between existing CSI-RS resource and additional CSI-RS resource.

[0028] Figure 14 shows an example of beam application timing 1.

[0029] Figure 15 shows an example of application timing of CSI-RS resource.

[0030] Figure 16 shows an association of the number of supported CSI-RS ports and base station antenna arrangement for single panel of existing specification.

[0031] Figure 17 shows an association of the number of supported CSI-RS ports and base station antenna arrangement for multiple panel of existing specification.

[0032] Figure 18An example of the setting involved in Option 1 of Embodiment C1.

[0033] Figure 19 A first example of the setting involved in Option 2 of Embodiment C1.

[0034] Figure 20 A second example of the setting involved in Option 2 of Embodiment C1.

[0035] Figure 21A and Figure 21B An example of the base station antenna arrangement involved in Option 2 of Embodiment C1.

[0036] Figure 22 A first example of the setting involved in Option 3 of Embodiment C1.

[0037] Figure 23 A second example of the setting involved in Option 3 of Embodiment C1.

[0038] Figure 24A and Figure 24B An example of the base station antenna arrangement involved in Option 3 of Embodiment C1.

[0039] Figure 25 is a diagram showing an example of the schematic structure of a wireless communication system involved in an embodiment.

[0040] Figure 26 is a diagram showing an example of the structure of a base station involved in an embodiment.

[0041] Figure 27 is a diagram showing an example of the structure of a user terminal involved in an embodiment.

[0042] Figure 28 is a diagram showing an example of the hardware structure of a base station and a user terminal involved in an embodiment.

[0043] Figure 29 is a diagram showing an example of a vehicle involved in an embodiment. DETAILED DESCRIPTION

[0044] (TCI, spatial relation, QCL)

[0045] In NR, it is being studied to control at least one of reception processing (for example, at least one of reception, demapping, demodulation, decoding) and transmission processing (for example, at least one of transmission, mapping, precoding, modulation, coding) of a signal and a channel (expressed as a signal / channel) in a UE based on a transmission configuration indication state (TCI state).

[0046] A TCI state can also indicate a state applied to a signal / channel of a downlink. A state equivalent to a TCI state applied to a signal / channel of an uplink can also be expressed as a spatial relation.

[0047] A TCI state is information related to a Quasi-Co-Location (QCL) of a signal / channel, and can also be referred to as a spatial reception parameter, spatial relation information, etc. A TCI state can also be configured to a UE per channel or per signal.

[0048] A QCL is an indicator indicating a statistical property of a signal / channel. For example, it can also mean that, in the case where a certain signal / channel is in a QCL relationship with other signals / channels, it can be assumed that at least one of a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial parameter (e.g., a spatial Rx parameter) is the same among the different signals / channels (as to at least one of them is QCL).

[0049] In addition, a spatial reception parameter can also correspond to a reception beam (e.g., a reception analog beam) of a UE, and a beam can also be determined based on a spatial QCL. A QCL (or at least one element of a QCL) in the disclosure can also be rewritten as a sQCL (spatial QCL).

[0050] A QCL can also be defined in multiple types (QCL types). For example, four QCL types A-D can be set in which different parameters (or sets of parameters) can be assumed to be the same.

[0051] A UE can assume that a certain control resource set (Control Resource Set (CORESET)), channel, or reference signal is in a specific QCL (e.g., QCL type D) relationship with another CORESET, channel, or reference signal, and this case can also be referred to as a QCL assumption.

[0052] A UE can also determine at least one of a transmission beam (Tx beam) and a reception beam (Rx beam) of a signal / channel based on a TCI state or a QCL assumption of the signal / channel.

[0053] The TCI state may be, for example, information related to QCL of a channel (in other words, a Reference Signal (RS) for the channel) that becomes a target and other signals (for example, other RSs). The TCI state can be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

[0054] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0055] The channel for which the TCI state or spatial relation is set (designated) may be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0056] Furthermore, the RS that is in a QCL relationship with the channel may be, for example, at least one of a Synchronization Signal Block (SSB), a Channel State Information Reference Signal (CSI-RS), a reference signal for measurement (Sounding Reference Signal (SRS)), a CSI-RS for tracking (also referred to as a Tracking Reference Signal (TRS)), and a reference signal for QCL detection (also referred to as a QRS).

[0057] The SSB is a signal block that includes at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). The SSB can also be referred to as an SS / PBCH block.

[0058] The RS of QCL Type X of the TCI state can also mean a RS in a QCL Type X relationship with (a DMRS of) a certain channel / signal, which can also be referred to as a QCL source of QCL Type X of the TCI state.

[0059] In the present disclosure, a TCI state, an indication of a TCI state, a unified TCI state, a TCI state applied in a channel / signal configured to follow a unified TCI state, a TCI state applied in a UE-specific PDSCH and a CORESET / PDCCH associated with a USS, a TCI state applied in a PUCCH and a PUSCH can also be overwritten to each other.

[0060] (CSI report (or reporting))

[0061] In Rel. 15 NR, a terminal (also referred to as a user terminal, a User Equipment (UE), etc.) generates (also referred to as decides, calculates, estimates, measures, etc.) channel state information (CSI) based on a reference signal (RS) (or a resource for the RS) and transmits (also referred to as reports, feeds back, etc.) the generated CSI to a network (for example, a base station). The CSI can also be transmitted to the base station, for example, using an uplink control channel (for example, a Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (for example, a Physical Uplink Shared Channel (PUSCH)).

[0062] The RS used in the generation of the CSI is, for example, at least one of a Channel State Information Reference Signal (CSI-RS), a synchronization signal / broadcast channel (Synchronization Signal / Physical Broadcast Channel (SS / PBCH)) block, a Synchronization Signal (SS), a DeModulation Reference Signal (DMRS), etc.

[0063] The CSI-RS can also include at least one of a Non Zero Power (NZP) CSI-RS and a CSI-Interference Management (CSI-IM). The SS / PBCH block is a block including the SS and the PBCH (and a corresponding DMRS), and can also be referred to as an SS block (SSB), etc. Also, the SS can also include at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).

[0064] In addition, the CSI can also include at least one of a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a CSI-RS Resource Indicator (CRI), a SS / PBCH Block Indicator (SSBRI), a Layer Indicator (LI), a Rank Indicator (RI), a L1-RSRP (Layer 1 Reference Signal Received Power), a L1-RSRQ (Reference Signal Received Quality), a L1-SINR (Signal to Interference plus Noise Ratio), a L1-SNR (Signal to Noise Ratio), etc.

[0065] The UE can also receive information (report configuration information) related to the CSI report, and control the CSI report based on the report configuration information. The report configuration information can also be, for example, a "CSI-ReportConfig" of an Information Element (IE) of a Radio Resource Control (RRC). In addition, in the present disclosure, the RRC IE can also be mutually rewritten as an RRC parameter, a higher layer parameter, etc.

[0066] The report setting information (for example, "CSI-ReportConfig" of RRC IE) can also contain at least one of the following, for example.

[0067] • Information on the type of CSI report (report type information, for example, "reportConfigType" of RRC IE)

[0068] • Information on one or more quantities (one or more CSI parameters) of CSI that should be reported (report quantity information, for example, "reportQuantity" of RRC IE)

[0069] • Information on RS resources used in the generation of the quantity (the CSI parameter) (resource information, for example, "CSI-ResourceConfigId" of RRC IE)

[0070] • Information on the frequency domain that is the object of the CSI report (frequency domain information, for example, "reportFreqConfiguration" of RRC IE)

[0071] For example, the report type information can also indicate periodic CSI (P-CSI) reporting, aperiodic CSI (A-CSI) reporting, semi-persistent CSI (SP-CSI) reporting.

[0072] In addition, the report quantity information can also specify a combination of at least one of the above-described CSI parameters (for example, CRI, RI, PMI, CQI, LI, L1-RSRP, and the like).

[0073] In addition, the resource information can also be an ID of an RS resource. The RS resource can also contain a non-zero-power CSI-RS resource or an SSB, a CSI-IM resource (for example, a zero-power CSI-RS resource), for example.

[0074] Furthermore, the frequency domain information can also indicate a frequency granularity of the CSI report. The frequency granularity can include, for example, a wideband and a subband. The wideband is the entire CSI reporting band. The wideband can be, for example, the entire of a certain carrier (Component Carrier (CC), cell, serving cell), or the entire of a bandwidth part (BWP) within a certain carrier. The wideband can also be referred to as a CSI reporting band, an entire CSI reporting band, and the like.

[0075] Furthermore, the subband is a part of the wideband, and can be composed of one or more resource blocks (Resource Block (RB) or Physical Resource Block (PRB)). The size of the subband can be determined according to the size of the BWP (number of PRBs).

[0076] The frequency domain information can also indicate which PMI of the wideband or the subband is reported (the frequency domain information can include, for example, "pmi-FormatIndicator" of the RRC IE used in the determination of either of a wideband PMI report or a subband PMI report). The UE can determine the frequency granularity of the CSI report (i.e., either of a wideband PMI report or a subband PMI report) based on at least one of the above-described reporting quantity information and the frequency domain information.

[0077] In the case of setting (determining) a wideband PMI report, one wideband PMI can be reported for the entire CSI reporting band. On the other hand, in the case of setting a subband PMI report, it can be that a single wideband indication i1 is reported for the entire CSI reporting band, and one subband indication i2 for each of one or more subbands within the entire CSI report (e.g., a subband indication for each subband) is reported.

[0078] The UE performs channel estimation using the received RS, estimates a channel matrix H. The UE feeds back an index (PMI) determined based on the estimated channel matrix.

[0079] The PMI can also represent a precoder matrix (also simply referred to as a precoder) that the UE considers suitable for downlink (DL) transmission to the UE. Each value of the PMI can also correspond to one precoder matrix. A set of values of the PMI can also correspond to a set of different precoder matrices referred to as a precoder codebook (also simply referred to as a codebook).

[0080] In the space domain, the CSI report can also contain more than one type of CSI. For example, the CSI can also contain at least one of a first type (Type 1 CSI) for selection of a single beam and a second type (Type 2 CSI) for selection of multiple beams. A single beam can also be rewritten as a single layer, and multiple beams can also be rewritten as multiple layers. Furthermore, it can also be that Type 1 CSI does not assume multi-user multiple input multiple output (MIMO), while Type 2 CSI assumes multi-user MIMO.

[0081] The above-described codebook can also contain a codebook for Type 1 CSI (also referred to as a Type 1 codebook, etc.) and a codebook for Type 2 CSI (also referred to as a Type 2 codebook, etc.). Furthermore, Type 1 CSI can also contain Type 1 single-panel CSI and Type 1 multi-panel CSI, and different codebooks (Type 1 single-panel codebook, Type 1 multi-panel codebook) can also be specified respectively.

[0082] In the present disclosure, Type 1 and Type I can also be rewritten as each other. In the present disclosure, Type 2 and Type II can also be rewritten as each other.

[0083] The uplink control information (UCI) type can also contain at least one of a hybrid automatic repeat request acknowledgement (HARQ-ACK), a scheduling request (SR), and CSI. The UCI can be transmitted by PUCCH and can also be transmitted by PUSCH.

[0084] In Rel. 15 NR, the UCI can contain one CSI part for wideband PMI feedback. The CSI report #n contains PMI wideband information in the case of being reported.

[0085] In Rel. 15 NR, the UCI can contain 2 CSI parts for subband PMI feedback. CSI part 1 contains wideband PMI information. CSI part 2 contains one wideband PMI information and a number of subband PMI information. CSI part 1 and CSI part 2 can also be separately encoded.

[0086] In Rel. 15 NR, a UE is configured by higher layers with N (N≥1) CSI reporting configurations and M (M≥1) CSI resource configurations. For example, a CSI reporting configuration (CSI-ReportConfig) contains a resource configuration for channel measurement (resourcesForChannelMeasurement), a CSI-IM resource configuration for interference (csi-IM-ResourceForInterference), a NZP-CSI-RS configuration for interference (nzp-CSI-RS-ResourceForInterference), a reporting quantity (reportQuantity), and so on. Each of the resource configuration for channel measurement, the CSI-IM resource configuration for interference, and the NZP-CSI-RS configuration for interference is associated with a CSI resource configuration (CSI-ResourceConfig, CSI-ResourceConfigId). The CSI resource configuration contains a list of CSI-RS resource sets (csi-RS-ResourceSetList, e.g., a NZP-CSI-RS resource set or a CSI-IM resource set).

[0087] With both FR1 and FR2 as targets, in order to make more dynamic channel / interference hypotheses possible for NCJT, evaluation and specification of CSI reporting for at least one transmission of multi-TRP and multi-panel of DL are being studied.

[0088] (Codebook configuration)

[0089] A UE is configured by higher layer signaling (RRC signaling) with parameters related to a codebook (CB) (CodebookConfig). The codebook configuration is contained in a CSI reporting configuration (CSI-ReportConfig) of higher layer (RRC) parameters.

[0090] In the codebook configuration, at least one codebook is selected from among a plurality of codebooks including type 1 single panel (typeI-SinglePanel), type 1 multi-panel (typeI-MultiPanel), type 2 (typeII), and type 2 port selection (typeII-PortSelection).

[0091] A parameter in the codebook includes a parameter related to codebook subset restriction (CBSR) ("... Restriction" within CodebookConfig). The setting of CBSR is a bit indicating which PMI report is permitted ("1") and which PMI report is not permitted ("0") for a precoder associated with the bit of CBSR. One codebook index / antenna port corresponds to one bit of the CBSR bitmap.

[0092] (CSI report setting)

[0093] The CSI report setting (CSI-ReportConfig) of Rel. 16 includes, in addition to the codebook setting (CodebookConfig), CSI-RS resources for channel measurement (resourcesForChannelMeasurement (CMR)), CSI-RS resources for interference measurement (csi-IM-ResourcesForInterference (ZP-IMR), nzp-CSI-RS-ResourcesForInterference (NZP-IMR)), and the like. Among the parameters of the CSI-ReportConfig, parameters other than codebookConfig-r16 are also included in the CSI report setting of Rel. 15.

[0094] In Rel. 17, an extended CSI report setting (CSI-ReportConfig) for CSI measurement / reporting for multi-TRP using NCJT is being studied. In this CSI report setting, two CMR groups corresponding to each of the two TRPs are set. The CMRs within the CMR group can also be used for measurement of at least one of multi-TRP using NCJT and single-TRP. The N CMR pairs of NCJT are set by RRC signaling. The UE can also be set by RRC signaling whether to use the CMRs of the CMR pair in single-TRP measurement.

[0095] Regarding the CSI report associated with NCJT measurement of multi-TRP / panel set by a single CSI report setting, at least one of the following Option 1, 2 is being studied.

[0096] < Option 1 >

[0097] The UE is configured to report X (X=0, 1, 2) CSI associated with single-TRP measurement hypotheses and one CSI associated with NCJT measurement. In the case of X=2, two CSI are associated with two different single-TRP measurements using different CMR groups of CMRs.

[0098] <Option 2>

[0099] The UE can also be configured to report one CSI associated with the best measurement result among the measurement hypotheses for NCJT and single-TRP.

[0100] As described above, in Rel. 15 / 16, CBSR is configured per codebook configuration set per CSI reporting configuration set. That is, CBSR is applied to all CMRs, etc. within the corresponding CSI reporting configuration set.

[0101] However, in the Rel. 17 CSI reporting configuration for multi-TRP, in the case where the above-described Option 1, 2 is applied, it is possible to make the following measurement configuration.

[0102] Option 1 (X=0): Measurement of CSI for NCJT only.

[0103] Option 1 (X=1): Measurement of CSI for NCJT and single-TRP (1 TRP).

[0104] Option 1 (X=2): Measurement of CSI for NCJT and single-TRP (2 TRP).

[0105] Option 2: Measurement of both CSI for NCJT and single-TRP.

[0106] For the multiple subbands given by the CSI reporting #n indicated by the higher layer parameter csi-ReportingBand, the lowest subband of csi-ReportingBand can also be included as subband 0 and numbered consecutively in ascending order.

[0107] (PMI / Type 1 codebook)

[0108] As a Type 1 codebook (Rel. 15), for the base station side, a Type 1 single-panel codebook and a Type 1 multi-panel codebook are specified. In Type 1 single-panel, for (N1, N2), an antenna model of the CSI antenna port array (logical configuration) is specified. The number of CSI-RS antenna ports P CSI-RS is 2N1N2. In Type 1 multi-panel, the number of CSI-RS antenna ports P CSI-RS is specified for (N g, (N1, N2), specifies the antenna model of the CSI antenna port array (logical setting).

[0109] - Type 1 single panel codebook

[0110] For Rel. 15 Type 1 single panel CSI, for a UE, the higher layer parameter of codebook type (subType within type1 within codebookType within CodebookConfig) is set to Type 1 single panel ('typeI-SinglePanel'). In case of no number of layers v e {2, 3, 4}, the PMI value corresponds to 3 codebook indices i 1，1 , i 1，2 , i2. In case of number of layers v e {2, 3, 4}, the PMI value corresponds to 4 codebook indices i 1，1 , i 1，2 , i 1，3 , i2. In case of no number of layers v e {2, 3, 4}, the composite codebook index i1 = [i 1，1 i 1，2 ]. In case of number of layers v e {2, 3, 4}, the composite codebook index i1 = [i 1，1 i 1，2 i 1，3 ]. i1 can also be an index for wideband. i2 = n can also be an index for subband / phase.

[0111] For P CSI-RS , supported setting (combination of values) of (N1, N2) and (O1, O2) are specified in the specification. (N1, N2) represents the number of two-dimensional (2D) antenna elements, which is set by the higher layer parameter n1-n2 within moreThanTwo within nrOfAntennaPorts within typeI-SinglePanel. n1-n2 is a bitmap parameter of N1O1N2O2 bits. (O1, O2) is the oversampling factor of 2D.

[0112] For 1-layer CSI reporting and codebookMode = 1, the codebook contains indices i 1，1 =l=0, 1,..., N1O1-1 corresponding to the horizontal component of the beam, i 1，2 =m=0, 1,..., N2O2-1 corresponding to the vertical component of the beam, i2 = n = 0, 1, 2, 3 corresponding to the subband. The precoding matrix for 1-layer CSI reporting codebook using antenna ports 3000 to 2999+P CSI-RS 1，1 , i 1，2 , i2^ (1) = W l，m，n ​（1） , is given by

[0113] (E1)

[0114] Here, v l，m is an N1-row N2-column DFT vector (spatial domain (SD) vector, 2D-DFT vector, SD DFT vector, SD basis vector, SD beam), represented by exp(j2πln1 / O1N1) x exp(j2πmn2 / O2N2), n1=0,1,...,N1-1, n2=0,1,...,N2-1, determined by v, l. l，m represents a beam. The phase difference (co-phasing, inter-panel phase compensation, phase compensation between polarizations) between the two polarizations φ n = exp(jπn / 2) represents the phase of the other polarization with respect to the phase of one polarization.

[0115] - Type 1 multi-panel codebook

[0116] For Rel. 15 Type 1 multi-panel CSI, for the UE, the higher layer parameter of the codebook type (subType within type1 within codebookType within CodebookConfig) is set to Type 1 multi-panel ('typeI-MultiPanel'). For Rel. 15 Type 1 multi-panel CSI, if compared with Type 1 single panel, in addition to N1, N2, the number of panels N g is additionally reported i 1，4 . The same SD beam (DFT vector v l，m , SD basis index l, m) is selected for each panel, and only the inter-panel phase difference is additionally reported.

[0117] For P CSI-RS , the supported (N g , N1, N2) and (O1, O2) setting (combination of values) is specified in the specification. (N1, N2) is set by ng-n1-n2 within typeI-MultiPanel.i 1，1 l = {0, 1,..., N1O1-1} is the horizontal component of the oversampled SD basis.i1，2 =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.

[0118] For codebook mode (codebookMode = 1), it is used to utilize antenna ports 3000 to 2999+P. CSI-RS The precoding matrix of the Level 1 CSI report codebook uses index i 1，1 i 1，2 i 1，4 i2 and through W_i 1，1 i 1，2 i 1，4 , i2^(1) means. Here, W l，m，p，n （1） =W l，m，p，n ^(1,N g ,1).

[0119] For codebook mode = 1, it is used to access antenna ports 3000 to 2999+P. CSI-RS The 2-layer CSI report codebook for N g ={2,4} precoding matrix W_l,l',m,m',p,n^(2) is passed through 1 / sqrt(2)[W_l,m,p,n^(1,N)] g ,1) W_l,m,p,n^(2,N g ,1)] is given. Here, W_l,m,p,n^(1,N) g ,1) and W_l,m,p,n^(2,N) g ,1) (for the first layer, N g =2, the precoding matrix W with codeBookMode=1 l，m，p，n 1，2，1 For the second layer, N g =2, the precoding matrix W with codeBookMode=1 l，m，p，n 2，2，1 For the first layer, N g =4, the precoding matrix W with codeBookMode=1 l，m，p，n 1 ，4，1 For the second layer, N g =4, the precoding matrix W with codeBookMode=1 l，m，p，n 2，4，1 It is given by the following formula.

[0120] (E2)

[0121] Here, φ n = e jπn / 2 . For N g = 2, p = p1, for N g = 4, p = [p1, p2, p3]. φ_p1, φ_p2, φ_p3 denote inter-panel phase difference (inter-panel phase compensation). For panels 0, 1, 2, 3, the same SD beam is selected, φ_p1 denotes the phase difference of panel 1 to panel 0, φ_p2 denotes the phase difference of panel 2 to panel 0, φ_p3 denotes the phase difference of panel 3 to panel 0.

[0122] For codebook mode = 2, N g = 2, the precoding matrix for 1-layer CSI reporting codebook using antenna ports 3000 to 2999 + P CSI-RS < W l，m，p，n （1） = W l，m，p，n ^ (1, N g , 2).

[0123] (PMI / Type 2 codebook)

[0124] - Type 2 codebook

[0125] For Rel. 15 Type 2 CSI (Type 2 codebook), the UE is configured with the higher layer parameter codebookType set to 'typeII'.

[0126] In the present disclosure, a matrix Z of X rows and Y columns is sometimes denoted as Z (X x Y).

[0127] Rel. 15 Type 2 CSI for a given layer l, the precoding matrix for each subband (SB-wise) is based on the following.

[0128] W l (N t x N3) = W1W 2，l (F1)

[0129] N t is the number of antennas / antenna ports. N3 is the total number of precoding (beamforming) matrices (precoders) shown by the PMI (subbands).

[0130] W1(N tx 2L) are 2L DFT vectors (oversampled DFT vectors) representing the selected spatial domain basis. L e {2, 4} is the number of beams per layer. The actual number of beams for horizontal and vertical polarized beams in one position is 2L. For example, the DFT vectors for L = 2 SD beams can also be represented as b i , b j .

[0131] W 2，l (2L x N3) is a matrix of linear combination (LC) coefficients (subband complex LC coefficients, combining coefficients) for layer l. W 2，l represents beam selection, and co-phasing between 2 polarizations. For example, the LC coefficients corresponding to L = 2 SD beams b i , b j are c i , c j . For example, the channel vector h is approximated by L = 2 SD beams D linearly combined c i b i , + c j b j . The overhead of feedback is mainly due to the LC coefficient matrix W 2，l . In addition, Rel. 15 Type 2 CSI only supports rank 1 and 2.

[0132] In Type 2 CSI, the channel (channel matrix) for a certain user is represented by linear combination of 2 polarizations and L SD beams. Rel. 15 Type 2 CSI supports rank 1, 2.

[0133] - Extended Type 2 codebook (Rel. 16)

[0134] For Rel. 16 Type 2 CSI (enhanced Type 2 codebook), the UE is configured with a higher layer parameter codebookType set to 'typeII-r16'.

[0135] Rel. 16 Type 2 CSI reduces the overhead associated with the LC coefficient matrix W 2，l by frequency domain (FD) compression. Rel. 16 Type 2 CSI supports rank 3 and 4 in addition to rank 1 and 2.

[0136] In Rel. 16 Type 2 CSI, the precoding matrix W l for a given layer l is shown by

[0137] W l = W1W ~ l W f，l H (F2)

[0138] W 2，l W ~ l W f，l H W ~ W ~ l W ~ 2，l W f，l H W f，l W f，l

[0139] For CSI reporting, the UE can also be configured with one of two subband sizes. The subband (CQI subband) can also be defined as N PRB SB PRBs, depending on the total number of PRBs within the BWP. The number of PMI subbands per CQI subband, R, is configured by the RRC IE (numberOfPMI-SubbandsPerCQI-Subband). R controls the total number of precoding matrices represented by the PMI, N3, as a function of the number of subbands configured within csi-ReportingBand, the subband size configured by subbandSize, and the total number of PRBs within the BWP.

[0140] W1(N t ×2L) represents 2L DFT vectors. To represent this matrix, multiple indices of the SD basis and a 2-dimensional over-sampling factor are reported.

[0141] W ~ l (2L x M v ) is the LC coefficient matrix. To represent this matrix, the maximum K0 non-zero coefficients (NZCs, non-zero amplitude LC coefficients) are reported. This reporting consists of two parts: a bitmap indicating the NZC locations and quantized NZC values.

[0142] W f，l (N3 x M v ​) for layer l is M v DFT vectors (frequency domain (FD) DFT vectors, FD basis vectors, FD beams) representing selected frequency domain basis. Each DFT vector uses N3 FD bases (subbands). N3 is the total number of precoding (beamforming) matrices (precoders) shown by PMI as a function of the number of subbands set within csi-ReportingBand. csi-ReportingBand represents a continuous or discontinuous subband within a BWP in the case where CSI for that BWP is reported. Each layer has M v FD DFT vectors. In the case where N3 > 19, M v FD DFT vectors (FD bases) are selected from an intermediate subset (InS) of size N3' (< N3). In the case where 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, also known as binomial coefficients.

[0143] The frequency domain response / distribution (frequency response) represented by the linear combination of FD DFT vectors and LC can also be referred to as an FD beam. The FD beam can also correspond to a delay profile (time response).

[0144] The PMI subband size is given by CQI subband size / R, R ∈ {1, 2}. The number of FD DFT vectors M v is given by ceil(p v × N3 / R). The number of FD DFT vectors M v is the same for all layers l ∈ {1, 2, 3, 4}. p v is set by higher layers.

[0145] The number of precoding matrices shown by PMI is determined by L + M v vectors.

[0146] The L SD beams (SD DFT vectors) v m_1^（i），m_2^（i） are identified by q1, q2, n1, n2, and shown by i 1，1 , i 1，2 .

[0147] Mv An FD DFT vector is identified by M initial ∈ {-2M v +1, -2M v +2,..., 0}, n 3，l = [n 3，l （0） ,..., n 3，l （M_v-1） ], n 3，l （f） ∈ {0, 1,..., N3-1}.

[0148] In the FD DFT vectors, for the index t = 0, 1,..., N3-1 of the FD basis (subband) and the element (FD basis) of the layer l = 1,..., v is y t，l （f） = exp(j2πtn 3，l （f） / N3). In the M v FD DFT vectors, for the index f = 0, 1,..., M v -1 of the FD DFT vectors, the FD DFT vector is [y 0，l （f） , y 1，l （f） ,..., y N_3-1，l （f） ] T .

[0149] The rows of the matrix W 2，l represent the channel frequency response of a particular SD beam. In case the SD beams have a high directivity, the channel taps (in time domain, the power delay profile becomes discrete) per beam are limited. As a result, the channel frequency response of each SD beam has a high correlation (in frequency domain close to flat). In this case, the channel frequency response can be approximated by a linear combination of a small number of FD DFT vectors. For example, in case M v = 2, the frequency response associated with the SD beam b0is approximated by d1 q f2+, d2 0 f 0 using the FD DFT vectors f2, f 0 and the LC coefficients d1 0 , d2 q .

[0150] The dominant (dominating) M v FD DFT vectors are selected. By setting M v ≪ N3, W ~ lW 2，l M v all or part of the FDDFT vectors are used for the approximation of the frequency response of each SD beam. A bitmap is used to report only the selected FDDFT vectors for each SD beam. In the case where the bitmap is not reported, all FDDFT vectors are selected for each SD beam. In this case, the NZC for all FDDFT vectors are reported for each SD beam. The number of NZC within one layer K k NZ ≤ K0= ceil(β × 2LM v ), the number of NZC across all layers K NZ ≤ 2K0= ceil(β × 2LM v ). β is set by higher layer.

[0151] In the extended Type 2 codebook of Rel. 16, L, β, p v The values of (combination of codebook parameters, parameter combination) are determined by the higher layer parameter paramCombination-r16 (codebook combination setting).

[0152] Type 2 CSI feedback on PUSCH in Rel. 16 contains 2 parts. CSI part 1 has a fixed payload size, which is used for the identification of the number of information bits in CSI part 2. The size of part 2 is variable (UCI size depends on the number of NZC, which is not known by the base station). The UE reports the number of NZC in CSI part 1, which determines the size of CSI part 2. The base station identifies the size of CSI part 2 after receiving CSI part 1.

[0153] In the extended Type 2 CSI feedback of Rel. 16, CSI part 1 (if reported) contains RI, CQI, an indicator of the total number of non-zero amplitude coefficients across multiple layers for the extended Type 2 CSI. The fields (if reported) of part 1, i.e., RI, CQI, an indicator of the total number of non-zero amplitude coefficients across multiple layers, are encoded separately. CSI part 2 contains the PMI of the extended Type 2 CSI. Part 1 and 2 are encoded separately. CSI part 2 (PMI) contains the oversampling factor, the indices of the SD bases corresponding to each SD beam, the indices of the initial FDDFT vectors (starting offset) of the selected DFT window M initial , the selected FD bases per layer, the NZC (amplitude and phase) per layer, the strongest coefficient indicator (SCI) per layer, at least one of the amplitude of the strongest coefficient per layer per polarization.

[0154] The multiple PMI indices (PMI values, codebook indices) associated with different CSI part 2 information for the l-th layer can also follow the below.

[0155] · i 1，1 : 2-dimensional rotation factor [q1 q2] in oversampling. q1∈{0,1,...,O1-1}, q2∈{0,1,...,O2-1}.

[0156] · i 1，2 : Multiple indices of SD bases corresponding to each SD beam. i 1，2 ∈{0,1,...,C(N1N2,L)-1}.

[0157] · i 1，5 : Codebook indicator. Index of FD base of selected DFT window. i 1，5 ∈{0,1,...,2M v -1}.

[0158] · i 1，6，l : Codebook indicator. Selected FD base for the l-th layer. In the case of N3≤19, i 1，6，l ∈{0,1,...,C(N3-1,M v -1)-1}. In the case of N3>19, i 1，6，l ∈{0,1,...,C(2M v -1,M v -1)-1}.

[0159] · i 1，7，l : Bitmap indicator for the l-th layer. Non-zero bits within the bitmap identify which coefficients within i 2，4，l and i 2，5，l are reported. i 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}.

[0160] · i 1，8，l : Strongest coefficient indicator for the l-th layer (largest element k l，i，f （2） within the amplitude coefficient indicator).

[0161] · i2，3，l : Amplitude coefficient indicator of the (two polarized) coefficient (wideband) of the l-th layer.i 2，3，l = k l，0 （1） k l，1 （1） .

[0162] : Amplitude coefficient indicator of the reported coefficient (subband) of the l-th layer.i 2，4，l = k 2，3，l l，0 （2） ... k l，M_v-1 （2） .

[0163] : Phase coefficient indicator of the reported coefficient (subband) of the l-th layer.i 2，5，l = c 2，5，l ...c l，0，f .

[0164] Let f l，M_v-1，f l ∈ {0, 1,..., M * -1} be the index of i v 2，4，l Let k l * ∈ {0, 1,..., 2L-1} be the index of i l，f_l^* （2） This f l * and i l * identify the strongest coefficient for layer l = 1,..., v, i.e., the element k 2，4，l of i l，i_l^*，f_l^* （2） for layer l. The codebook index n 3，l is remapped to n 3，l （f_l^*） = (n 3，l （f） - n 3，l （f） ) mod N3, and after remapping becomes n 3，l （f _l^*） . The index f is remapped to f = (f - f 3，l （f_l^*） ) mod M l , and after remapping becomes f * l * v l * ​​​​= 0 (l = 1,..., v). i 2，4，l 2，5，l 1，7，l denote the remapped amplitude coefficients, phase coefficients, and bitmaps, respectively. The strongest coefficient of layer l, identified by i 1，8，l ∈ {0, 1,..., 2L-1}, is given for v = 1 by i 1，8，l = Σ i=0 i_1^* k l，i，0 （3） -1, for 1 < v ≤ 4 by i 1，8，l = i l * .

[0165] W ~ l The reported LC coefficients (complex coefficients) within W

[0166] - Amplitude quantization

[0167] The polarization-specific reference amplitudes are quantized using 16-level quantization of the mapping from amplitude coefficient indicator elements k 2，3，l to amplitude coefficients p l，p （1） p l，p （1） By this table, p l （1） = [p l，0 （1） p l，1 （1） ] is quantized to [k l，0 （1） k l，1 （1） ], k l，p （1） ∈ {0,..., 15}. All other coefficients are quantized using 8-level quantization of the mapping from amplitude coefficient indicator elements k 2，4，l to amplitude coefficients p l，i，f （2） p l，i，f （2） By 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}.

[0168] - Phase quantization

[0169] Amplitude coefficient indicator i 2，5，l The elements within (amplitude coefficient indicator elements) [c l，0 ... c l，M_v-1 Reported via UE (using 4 bits). All phase coefficients are quantized using 16-PSK. The quantity φ used for phase difference. l，i，f =exp(j2πc l，i，f The phase coefficient in / 16) is quantized as c l，f =[c l，0，f ... c l，2L-1.f ]、c l，i，fi ∈{0, ..., 15}.

[0170] The amplitude coefficient indicator element k corresponding to the strongest coefficient of layer l l，floor（i_l^* / L） （1） =15 (maximum value), amplitude coefficient indicator element k l，i_l^*，0 （2） =7 (maximum value), phase coefficient indicator element c l，i_l^*，0 （2） =0 (minimum value). For l=1, ..., v, k is not reported. l，floor（i_l^* / L） （1） k l，i_l^*，0 （2） c l，i_l^*，0 （2） =0.

[0171] 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 .

[0172] By using 3000 to 2999+P CSI-RS The precoding matrix W is represented by the codebook reported by the CSI layer v (=1 to 4). （v Based on the precoding matrix W for layer l (=1 to v) l Precoding matrix W l This is illustrated by the following formula.

[0173] (G1)

[0174] Here, the beam indexes are 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 broadband amplitude coefficient. 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 polarized wave, the amplitude coefficient for each polarized wave, each FD beam, and each SD beam, and the phase coefficient for each polarized wave, each FD beam, and each SD beam.

[0175] As part of CSI Part 2, PMI information is grouped into three groups (Groups 0 to 2) for the given CSI report. This is important in cases of CSI omission. Index i 2，4，l i 2，5，l i 1，7，l Each reported element is associated with a specific priority rule. Groups 0 to 2 follow the rules below.

[0176] Group 0: Index i 1，1 i 1，2 i 1，8，l (l=1, ..., v)

[0177] • 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)

[0178] • Group 2: i 1，7，l the lowest (least significant) floor(K NZ / 2) priority elements in the i 2，4，l the lowest (least significant) floor(K NZ / 2) priority elements in the i 2，5，l the lowest (least significant) floor(K NZ / 2) priority elements (l = 1,..., v)

[0179] In Type 1 CSI, SD beams represented using SD DFT vectors are transmitted towards the UE. In Type 2 CSI, L SD beams are linearly combined and transmitted towards the UE. Each SD beam can be associated with multiple FD DFT vectors (FD beams, FD basis, frequency response). The channel frequency response can be obtained by linear combination of these FD DFT vectors for the corresponding SD beam. The channel frequency response corresponds to a power delay profile.

[0180] - Type 2 port selection codebook

[0181] For Type 2 port selection (PS) CSI (Type 2 PS codebook) for Rel. 15, the UE is configured with the higher layer parameter codebookType set to 'typeII-PortSelection'.

[0182] In Type 2 port selection CSI for Rel. 15, the UE does not need to derive SD beams considering SD DFT vectors as in Type 2 CSI. The base station transmits CSI-RS using K CSI-RS ports beamformed considering a set of SD beams. The UE selects / identifies the best L (≤ K) CSI-RS ports per polarization and reports these indices within W1. Type 2 PS CSI for Rel. 15 supports rank 1, 2.

[0183] - Extended Type 2 port selection codebook (Rel. 16)

[0184] For Type 2 PS CSI for Rel. 16 (enhanced Type 2 PS codebook), the UE is configured with the higher layer parameter codebookType set to 'typeII-PortSelection-r16'.

[0185] The operation of Type 2 PS CSI for Rel. 16 is the same as Type 2 CSI for Rel. 16 except for the selection of SD beams. Type 2 PS CSI for Rel. 15 supports rank 1 to 4.

[0186] For a layer l e {1, 2, 3, 4}, a precoding matrix W l is shown by the following equation.

[0187] W l (N t x N3) = QW1W ~ l W f，l H (H1)

[0188] Here, Q (N t x K) represents K SD beams used in CSI-RS beamforming. W1 (K x 2L) is a block diagonal matrix. W ~ l (2L x M) is an LC coefficient matrix. W f，l (N3 x M) is a matrix formed of M vectors (FD basis vectors), each vector containing N3 FD bases. K is set by a higher layer. L is set by a higher layer. P CSI-RS e {4, 8, 12, 16, 24, 32}. In the case of P CSI-RS > 4, L e {2, 3, 4}.

[0189] In Rel. 15 / 16 Type 2 PS CSI, each CSI-RS port #i is associated with an SD beam b i .

[0190] Rel. 16 Type 2 PS CSI reduces the number of FD basis vectors from N3 to M v = (M v « N3) as in Rel. 15 Type 2 PS CSI, which reduces the overhead.

[0191] - Additional extension of Type 2 port selection codebook (Rel. 17)

[0192] For Rel. 17 Type 2 PS CSI / codebook (further enhanced Type 2 PS codebook), the UE is set with a higher layer parameter codebookType set to 'typeII-PortSelection-r17'.

[0193] In Rel. 17 Type 2 PS CSI, each CSI-RS port #i is associated with an SD-FD beam pair (SD beam b i and FD beam fi，j The pair (j is frequency index) is associated. In this example, ports 3 and 4 are associated to the same SD beam, to different FD beams.

[0194] The frequency selectivity of the channel frequency response observed in the UE based on the SD beam-FD beam pair is also reduced by delay pre-compensation, compared to the frequency selectivity of the channel frequency response observed in the UE based on the SD beam.

[0195] The main scenario for Rel. 17 Type 2 PS codebook is FDD. The channel reciprocity based on SRS measurements is not complete (the angles of the beams in UL can be different from the angles of the beams in DL, in FDD the UL frequency is different from the DL frequency, the effective antenna spacing is different in this UL and DL frequency). However, the base station can get / select several partial information (main (dominant) angles and delays (SD beams and FD beams)). In addition to the CSI reporting, SRS measurements in the base station are used, so that the base station can get the CSI for deciding the DL MIMO precoder. In this case, to reduce the CSI overhead, several CSI reports can also be omitted.

[0196] In the parameter combination L, β, p for Rel. 16 Type 2 codebook v L is the number of SD beams. p v is a parameter for calculating the number of FD basis vectors M v = ceil (p v x N3 / R). β is a parameter for calculating the maximum number of NZCs.

[0197] In the additional extension Type 2 PS codebook of Rel. 17, the values of α, M, β (combination of codebook parameters, parameter combination) are decided by the higher layer parameter paramCombination-r17 (codebook parameter setting). In the parameter combination α, M, β for the additional extension Type 2 PS codebook of Rel. 17, α is a parameter for calculating the number of selected CSI-RS ports within the PS codebook K1 = αP CSI-RS . M is the number of FD basis vectors. β is a parameter for calculating the maximum number of NZCs. The precoding matrix shown by the PMI is decided from L+M vectors. Here, L = K1 / 2, K1 = αP CSI-RS .

[0198] In the additional extension Type 2 PS CSI in Rel.17, each CSI-RS port is beamformed using SD beams and FD beams. Each port is associated with an SD-FD beam pair.

[0199] For the precoding matrix W l is shown by the following equation.

[0200] W l (K x N3) = W1W ~ l W f，l H (H2)

[0201] For W1(K x 2L), each matrix block is composed of L columns of K x K identity matrix. The base station transmits K beamformed CSI-RS ports. Each port is associated with an SD-FD beam pair. The UE selects L ports out of K, and reports an index indicating the selected ports to the base station as part of the PMI. In addition, in Rel.16, each port is associated with an SD beam.

[0202] W ~ l (2L x M v ) is a matrix composed of combining coefficients (subband complex LC coefficients). A maximum of K0 NZCs are reported. The report is composed of two parts indicating the NZC position by a bitmap and quantizing the NZC.

[0203] In the additional extension Type 2 PS CSI in Rel.17, K l NZ =Σ i=0 k1-1 Σ f=0 M-1 k l，i，f （3） ≤K0 is the number of non-zero coefficients in layer l = 1,..., v, K NZ =Σ l=1 v K l NZ ≤2K0 is the total number of non-zero coefficients. In the case of v ≤ 2 and K NZ =K1Mv, i 1，7，l (bitmap indicator for the l-th layer) is not reported. That is, in the case where the total number of reported NZCs is equal to the maximum number of K1Mv, and v ≤ 2, the report of the bitmap indicating the position of the NZC is omitted. In addition, in Rel.16, the bitmap of the NZC position is always reported.

[0204] W f，l (N3 x Mv ) is a matrix composed of M v (M v = 1 or 2) FD basis vectors per layer. Each vector contains N3 FD bases (FD-DFT bases). The base station can also turn off W f，l . In the case of M v = 1, W f，l is off, and no additional FD basis vectors are reported. In the case of M v = 2, W f，l is on, and M v additional FD basis vectors are reported. In the case of M v = 2, the window size N of FD bases is set by the higher layer parameter (valueOfN) to be N e {2, 4}. In addition, in Rel. 16, W f，l is always reported.

[0205] (JT)

[0206] Joint transmission (JT) can also mean simultaneous data transmission from multiple points (e.g., TRPs) to a single UE.

[0207] Rel. 17 supports non-coherent joint transmission (NCJT) from 2 TRPs. PDSCHs from 2 TRPs can also be independently precoded and decoded. Frequency resources can be non-overlapping, partially overlapping, or fully overlapping. In the case of generating overlap, PDSCH from one TRP becomes interference to PDSCH from the other TRP.

[0208] In Rel. 18, support for coherent joint transmission (CJT) using a maximum of 4 TRPs is being studied. Data from 4 TRPs can also be coherently precoded and transmitted to the UE on the same time-frequency resources. For example, it can also be considered to use the same precoding matrix for the channels from 4 TRPs. "Coherent" can also mean that there is a certain relationship between the phases of multiple received signals. It can also be that 4-TRP joint precoding is used to improve signal quality without interference between 4 TRPs. Data can also be interfered only by TRPs other than 4.

[0209] (NCJT CSI)

[0210] In Rel.17, the scenario in which NCJT CSI reporting can be applied is a single-DCI-based MTRP NCJT with a type 1 single-panel codebook. For NCJT CSI measurements, within a single CSI-ReportConfig, two CMR groups can be configured for each channel measurement resource (CMR) from a TRP. A CSI reporting mode can be configured from both modes.

[0211] 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).

[0212] Accompanied by K s =K1+K2 CMRs, two CMR groups 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 set by higher layers through selection from all possible pairs. Supports N=1, K... s =2. N max =2 support is an optional feature for 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.

[0213] The bitmap based on RRC signaling represents the N (N=1,2) CMR pairs actually used in NCJT measurements by showing one CMR from each CMR group. The UE uses the CMRs within the 2 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.

[0214] The UE selects one or more CSIs to report based on the mode (CSI reporting mode) set by csi-ReportMode. csi-ReportMode represents one of the two modes (NCJT CSI modes) below, mode 1 and mode 2.

[0215] - Mode 1

[0216] The UE can also be configured to report X CSI associated with single-TRP measurement hypothesis and one CSI associated with NCJT measurement hypothesis. X = 0, 1, 2. In case of X = 2, 2 CSI are associated with 2 different single-TRP measurement hypotheses with multiple CMRs from different multiple CMR groups. The support of X = 1, 2 is optional functionality for the UE supporting Option 1.

[0217] - Mode 2

[0218] The UE can also be configured to report one CSI associated with the best 1 out of the measurement hypotheses of NCJT and single-TRP.

[0219] In Mode 1, the UE reports X (X = 0, 1, 2) single-TRP CSI and one NCJT CSI, total number of CSI is X + 1. In Mode 2, the UE reports one best CSI (one CSI) out of all single-TRP CSI and one NCJT CSI.

[0220] In one CSI report, maximum 2 single-TRP CSI and 1 NCJT CSI (with Mode 1 of X = 2) can be reported. The NCJT CSI contains 1 CRI, 2 RIs (with one joint RI index), 2 PMIs, 2 LIs, 1 CQI (below 4 layers). The single-TRP CSI is the same as existing CSI, contains 1 CRI, 1 RI / PMI / LI, 1 or 2 CQI (below 8 layers, 1 CQI per CW).

[0221] For several cases below, define new mapping order (table) of multiple fields in one CSI report.

[0222] Mapping order for wideband CSI with Mode 1 of X = 0. Wideband CSI is supported only for Mode 1 of X = 0, i.e. NCJT CSI.

[0223] Mapping order for CSI part 1 of Mode 1 and 2.

[0224] Mapping order for CSI part 2 wideband of Mode 1 and 2.

[0225] Mapping order for CSI part 2 subband of Mode 1 and 2.

[0226] (CJT CSI)

[0227] In the ideal case of (4 TRPs co-located (considered as same location)), joint estimation of the aggregated channel matrix H can be done, and the joint precoding matrix V can be fed back. However, the large scale path loss of the 4 paths can be quite different. The joint precoding matrix V based on constant module codebook is not correct. In this case, the feedback of each TRP and the inter-TRP coefficient can be more integrated than the current NR type 2 codebook.

[0228] For the maximum 4 TRP CJT in FR1, the selection of the 4 TRPs can also be semi-static. Therefore, this selection and the configuration of the 4 CMRs (4 CSI-RS resources) for channel measurement can also be semi-static. Dynamic indication of the 4 TRPs from a list of CSI-RS resources can also be possible, but with low likelihood.

[0229] The path loss from the 4 TRPs to the UE is different. Therefore, it is difficult to report only one aggregated CSI representing the joint channel matrix.

[0230] Considering fallback operation to NCJT (i.e., single TRP), also considering the CSI of each TRP (i.e., single TRP CSI like Rel. 17 NCJT CSI).

[0231] Assuming ideal backhaul, synchronization, same number of antenna ports across multiple TRPs, CSI acquisition for FR1 and coherent joint transmission (CJT) with maximum 4 TRPs is being studied. To face FDD CJT multi-TRP, the extension (Rel. 16) of the type 2 codebook, the improvement of the additional extension (Rel. 17) of the type 2 PS codebook is being studied.

[0232] W1 (matrix representing SD DFT vectors) for each TRP / W f (matrix representing FD DFT vectors) can be the same or different. W l (NZC) for each TRP can also be different. W1 / W f / W l can be selected jointly or independently. For the design of W1 / W f / W l , different scenarios are preferred with different options. W φIt can be reported as an independent content or can be reported within W l These used guidelines are related to the configuration scenario (e.g., intra-site multi-TRP or inter-site multi-TRP).

[0233] For example, the precoding matrix for 4-TRP CJT CSI (codebook) can also be represented by W1 / W f / W l for each TRP. W1 for each TRP can be the same or different, and can be selected jointly or independently. W l for each TRP can also be different, and can be selected jointly or independently. W f for each TRP can be the same or different, and can be selected jointly or independently.

[0234] In the (Rel. 18) Type 2 codebook (codebook structure) for CJT multi-TRP (mTRP), at least one of the following several modes (CJT codebook mode, CJT CSI mode) can also be supported.

[0235] - Mode 1 is the basis selection of SD / FD per TRP / per TRP group. It allows independent FD basis selection across N TRPs / TRP groups. For example, the codebook structure is given by the following formula. Here, N is the number of TRPs or TRP groups.

[0236] (J1)

[0237] - Mode 2 is the basis selection of SD per TRP / per TRP group (port group or resource), and the basis selection of joint / common FD (across N TRPs / TRP groups). For example, the codebook structure is given by the following formula. Here, N is the number of TRPs or TRP groups.

[0238] (J2)

[0239] In these two modes, the detailed design such as parameter combination, basis selection, TRP (group) selection, reference amplitude, W2 quantization manner can also be commonized.

[0240] For Type 2 CSI for Rel. 18 CJT (enhanced Type II codebook for CJT), a UE can also be configured with a higher layer parameter codebookType set to 'typeII-CJT-r18'. For Type 2 PS CSI for Rel. 18 CJT (further enhanced Type II port selection codebook for CJT), a UE can also be configured with a higher layer parameter codebookType set to 'typeII-CJT-PortSelection-r18'.

[0241] (Doppler CSI)

[0242] There is an ongoing study of utilizing time-domain correlation / Doppler-domain (DD) information for CSI reporting extension / capability enhancement for UEs moving at high / medium speed. For example, there is an ongoing study of improving the extended (Rel. 16) Type 2 codebook, the further extended (Rel. 17) Type 2 PS codebook, without changing the spatial domain basis and the frequency domain basis, from a UE to report time-domain channel properties (TDCP, time domain correlation profile) measured via tracking CSI-RS (TRS).

[0243] Channel coherence time (CCT) depends on the maximum Doppler shift. Channel coherence time is the time during which the measured channel properties can be utilized, or the time until channel aging occurs. The maximum Doppler shift is estimated from the relative speed between the transmitter and the receiver. Channel coherence time T c is approximated by 1 / Δf max Here, Δf max = v / λ. If the moving speed of a UE becomes high, the channel coherence time becomes short. For example, in a carrier frequency of 4.5 GHz, if the moving speed exceeds about 25 km / h, the channel coherence time is less than 10 ms. For such a high moving speed, short channel coherence time, how to cope with it becomes a problem.

[0244] TRS is supported to follow the Doppler shift. However, there are the following problems in TRS.

[0245] ・The number of ports per CSI-RS resource set is limited to only 1. Each CSI-RS resource uses a single port.

[0246] ・The settable period is 10 ms or more.

[0247] ・CSI reporting for TRS is not assumed. There is no report setting for P-TRS. Although reporting can be set, the report quantity (reportQuantity) is only set to none ('none'). A maximum of 16 CSI-RS resources are used per CSI-RS resource set.

[0248] TRS is configured in resources in the time domain and the frequency domain. For measurement based on the influence of the Doppler shift, multiple RSs in the time domain are required within a specific frequency domain resource.

[0249] Consideration is given to utilizing CMR in measurement based on the influence of the Doppler shift. However, the RSs for measurement depend on the actual installation of the UE.

[0250] In the quantity of CSI reporting, information related to the Doppler shift is not supported. Information for decision of W = W1W2 is reported by the UE via the CSI codebook (PMI). Here, W1 is a wideband characteristic, indicating a spatial beam. W2 is a subband characteristic, indicating a coefficient of amplitude / phase for each spatial beam.

[0251] Regarding measurement related to the Doppler shift, consider case 1 in which the UE measures based on CSI-RS and case 2 in which the base station measures based on SRS. Regarding decision of the influence related to the Doppler shift, consider case 1-1 in which the UE decides based on CSI-RS measurement results, and case 1-2 in which the base station decides based on CSI-RS measurement results reported by the UE, and case 2-1 in which the base station decides based on SRS measurement results.

[0252] The CSI-RS measurement window and the CSI reporting window are being studied. Within the CSI-RS measurement window, it is also possible to measure more than one CSI-RS occasion. The reported CSI can also be associated with the CSI reporting window.

[0253] It is also possible to assume CSI reporting within slot n, with the length of the Doppler domain (DD) / time domain (TD) basis vector (DFT basis vector) (the number of bases of DD / TD) as N4. Within the CSI measurement window of slot [k, k+W meas -1], it is also possible to measure more than one CSI occasion for calculation of the CSI report. Here, k can also be a slot index, W measIt can also be the measurement window length (number of slots). The CSI occasion can also be configured within the CSI-ReportConfig. The CSI reporting window of slots [l, l+W CSI -1] can also be associated with the CSI reporting within slots n. Here, l can also be the slot index, W CSI It can also be the reporting window length (number of slots). The location of the CSI reference resource can also be expressed as n ref .

[0254] The duration W CSI of the CSI reporting window can be dN4. d and N4are determined by the configuration of the CMR. The starting point of the CSI reporting window is slot l. It can also be l= (n-N CSI，ref ). It can also be l= (n+δ). It can be δ={0, 2} and it can also be δ={0, 1, 2}.

[0255] The d slots can also be the duration in DD units.

[0256] In the case of assuming UE-side prediction, the UE is supported to predict the CSI / channel after slot l, and the location of slot l (from multiple candidates) is configured by the base station via higher layer signaling. The multiple candidates of the slot l location include the existing CSI reference resource locations (n-N CSI，ref ) and (n+δ). Here, δ>0. The existing CSI reference resource in the existing operation, i.e., (n-N CSI，ref ), is reused to represent the location of the last CSI-RS occasion for CSI reporting.

[0257] Regarding the parameter δ, the additional value 2 is supported.

[0258] N4is configured by the base station via higher layer signaling.

[0259] In N4=1, the DD bases can also be the same (identity, identical). It can also not be DD compressed. The codebook structure in this case can also be, for example, the following.

[0260] (J3)

[0261] In N4>1, the Doppler domain orthogonal DFT bases can also be commonly selected for the entire SD / FD bases. The codebook structure in this case can also be, for example, the following.

[0262] (J4)

[0263] Only Q>1 is allowed to represent the number of selected Doppler domain (DD) basis vectors. The detailed design of the SD / FD bases including the associated UCI parameters follows the existing specifications.

[0264] For Type 2 CSI for predicted PMI (enhanced Type II codebook for predicted PMI), the UE can also be configured with the higher layer parameter codebookType set to 'typeII-Doppler-r18'. For Type 2 PS CSI for predicted PMI (further enhanced Type II port selection codebook for predicted PMI), the UE can also be configured with the higher layer parameter codebookType set to 'typeII-Doppler-PortSelection-r18'.

[0265] (CSI-RS)

[0266] In Rel. 15, as a DL RS for at least one of channel state information (CSI) acquisition, beam management (BM), beam failure recovery (BFR), fine tracking of time and frequency, for example, a CSI-RS is used. The CSI-RS supports 1, 2, 4, 8, 12, 16, 24, 32 ports. The CSI-RS supports periodic, semi-persistent, aperiodic transmission. In order to adjust the overhead and the accuracy of the CSI estimation, the frequency density of the CSI-RS can be configured.

[0267] Figure 1is a figure indicating an example of CSI-RS location within a slot. Each row of the table indicates a row number, a number of ports, a density of a frequency domain, a CDM type, a time and frequency (time / frequency) location (location of component resource (kbar, lbar)), a code division multiplexing (CDM) group index, each resource location within a component resource ((RE, symbol), (k', l')). Here, the time / frequency location is a location of a resource (component resource) of time and frequency of the CSI-RS corresponding to one port. Kbar is a mark of underlining attached to "k" or more. Kbar indicates a starting resource element (RE) index of a component resource, and lbar indicates a starting symbol (OFDM symbol) index of a component resource.

[0268] As the CDM group, there are no CDM (N / A), FD-CDM2, CDM4, CDM8. FD-CDM2 multiplexes 2-port CSI-RS (FD2) in the same time and frequency by multiplying a length-2 frequency domain (FD)-orthogonal cover code (OCC) in RE units. CDM4 multiplexes 4-port CSI-RS (FD2TD2) in the same time and frequency by multiplying a length-2 FD-OCC and a length-2 time domain (TD)-OCC in RE unit symbol units. CDM8 multiplexes 8-port CSI-RS (FD2TD4) in the same time and frequency by multiplying a length-2 FD-OCC and a length-4 TD-OCC in RE unit symbol units.

[0269] Figures 2A-2D is a figure indicating an example of FD-OCC and TD-OCC. The sequence of the FD-OCC is indicated by w f (k') indicates. The sequence of the TD-OCC is indicated by w t (k'). Figure 2A indicates a case where the CDM type is no CDM. Figure 2B indicates a case where the CDM type is FD-CDM2. Figure 2C indicates a case where the CDM type is CDM4. Figure 2D indicates a case where the CDM type is CDM8.

[0270] Figure 3 is a figure indicating an example of CSI-RS location based on Figure 1 each number of ports. This figure indicates a frequency density, a component resource size (size [RE] in a frequency direction, size [symbol] in a time direction), a CDM type, per number of ports.

[0271] For example,Figure 4 An example of resource element (RE) mapping of a CSI-RS whose number of ports is 32 and whose component resource size is set to 2 subcarriers x 2 symbols Figure 1 The row index 17 of the above. In the frequency domain and the time domain of 1 physical resource block (physical resource block (PRB)) x 1 slot, 2 subcarriers x 2 symbols of the component resource are multiplexed 4 times in the frequency domain (frequency division multiplexing (FDM)) and 2 times in the time domain (time division multiplexing (TDM)), and thus 4 x 2 component resources are mapped. Further, the CSI-RS in each component resource is multiplied by an FD-OCC of length 2 subcarriers and a TD-OCC of length 2 symbols, and thus 4 CSI-RSs are multiplexed (code division multiplexing (CDM)) (CDM4, FD2TD2). Thus, a CSI-RS of 32 ports is transmitted in a resource of 1 PRB x 1 slot.

[0272] The maximum number of ports of the CSI-RS is 32, which is more than the maximum number of layers 8, and thus the UE can measure a large amount of channel states and can improve the measurement accuracy.

[0273] After Rel. 19, massive MIMO using more than 32 ports is being studied.

[0274] (Studies)

[0275] Consider the following several research projects.

[0276] - Research 1: For more than 32 CSI-RS ports, the base station antenna arrangement and setting are not sufficiently studied.

[0277] - Research 2: For more than 32 CSI-RS ports, the type of codebook / CSI supported is not sufficiently studied.

[0278] If such research projects are not clarified, there is a concern that it will lead to a decrease in communication quality / throughput.

[0279] Therefore, the inventors of the present invention have conceived a method for setting / reporting for a larger number of CSI-RS ports.

[0280] Hereinafter, embodiments related to the present disclosure will be described in detail with reference to the accompanying drawings. In addition, each of the following embodiments (for example, each case) can be applied individually, or at least two can be combined and applied.

[0281] In the present disclosure, "A / B" and "at least one of A and B" can also be interchangeable with each other. Also, in the present disclosure, "A / B / C" can also mean "at least one of A, B, and C."

[0282] In the present disclosure, activation, deactivation, indication (or indicate), selection (select), configuration, update, determination, etc. can also be interchangeable with each other. In the present disclosure, support, control, controllable, operation, operable, etc. can also be interchangeable with each other.

[0283] In the present disclosure, Radio Resource Control (RRC), RRC parameter, RRC message, higher layer parameter, information element (IE), configuration, etc. can also be interchangeable with each other. In the present disclosure, Medium Access Control (MAC) Control Element (CE), update command, activation / deactivation command, etc. can also be interchangeable with each other.

[0284] In the present disclosure, higher layer signaling can also be, for example, any one of or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc.

[0285] In the present disclosure, MAC signaling can also use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information can also be, for example, a Master Information Block (MIB), a System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (OSI), etc.

[0286] In the present disclosure, physical layer signaling can also be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), etc.

[0287] In the present disclosure, ab , a_b, the mark of b attached to the right lower side of a can also be rewritten with each other. In the present disclosure, a c , a^c, the mark of c attached to the right upper side of a can also be rewritten with each other. In the present disclosure, a b c , a_b^c, the mark of b attached to the right lower side of a and the mark of c attached to the right upper side of a can also be rewritten with each other. In the present disclosure, ceil(x), ceiling function (ceiling function), rounding up function can also be rewritten with each other. In the present disclosure, floor(x), floor function (floor function), rounding down function can also be rewritten with each other. In the present disclosure, x ~ can also be expressed as ~ attached to x, and can also be referred to as x tilde (tilde). In the present disclosure, x - can also be expressed as - attached to x, and can also be referred to as x bar (bar).

[0288] In the present disclosure, the following abbreviations can also be used.

[0289] - Time division multiplexing (TDM)

[0290] - Time-division-multiplexed (TDMed)

[0291] - Frequency division multiplexing (FDM)

[0292] - Frequency-division-multiplexed (FDMed)

[0293] In the present disclosure, port, CSI-RS port, antenna port can also be rewritten with each other. In the present disclosure, CSI-RS resource, CSI-RS configuration, time and frequency resources for CSI-RS can also be rewritten with each other.

[0294] In the present disclosure, beam, precoding, precoder, quasi co-location (QCL) assumption, QCL relationship, transmission configuration indicator (TCI) state, spatial domain filter, spatial domain reception filter, spatial domain transmission filter, reference signal (RS), spatial reception parameter can also be rewritten with each other.

[0295] In this disclosure, existing CSI-RS resources and CSI-RS resources in Rel.15 can be rewritten interchangeably. Additional CSI-RS resources, CSI-RS resources not present in Rel.15, and CSI-RS resources added in newer versions can also be rewritten interchangeably.

[0296] In this disclosure, applying OCC to CSI-RS and multiplying CSI-RS by OCC can be mutually modified. In this disclosure, 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 mutually modified.

[0297] (Wireless communication method)

[0298] <Implementation Method A1>

[0299] PRB OCC

[0300] OCCs across multiple PRBs (frequency domain OCC, inter-PRB OCC) can also be applied to CSI-RS. Values ​​(elements) within an inter-PRB OCC can also be applied per PRB. Values ​​within an inter-PRB OCC can also be applied per PRB with more than one value. Values ​​within an inter-PRB OCC can also be applied per precoding resource block group (PRG).

[0301] PRG can also be consecutive PRBs with the same precoding applied to DL. UE can also envision consecutive DL allocations of multiple PRBs within a PRG with the same precoding applied.

[0302] Inter-PRB OCC can also be applied to consecutive PRBs. For example, such as Figure 5A As shown, the OCC between PRBs of length 2 can also be applied to PRB#0 and PRB#1.

[0303] Inter-PRB OCC can also be applied to non-contiguous PRBs. Non-contiguous PRBs can be PRBs with an even number of PRB indices among multiple PRBs defined in the CSI-RS resource, PRBs with an odd number of PRB indices among multiple PRBs defined in the CSI-RS resource, PRBs with an interval of a certain number of PRBs among multiple PRBs defined in the CSI-RS resource, PRBs with a Comb structure for multiple PRBs defined in the CSI-RS resource, 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 in the CSI-RS resource.

[0304] For example, as shown in Figure 5B PRB inter-OCC [w f (0) w f (1)] can also be applied to PRB #0, PRB #2 with even PRB indices. f (0) w f (1)] can also be [+1 +1] or [+1 -1].

[0305] In the case of mapping CSI-RS to only PRBs with odd PRB indices or only PRBs with even PRB indices, PRB inter-OCC can also not be applied. In the case of mapping CSI-RS to only PRBs with odd PRB indices or only PRBs with even PRB indices, PRB inter-OCC can also be applied.

[0306] The association of OCC index i and the value of PRB inter-OCC can also be specified per PRB inter-OCC length (e.g., table). The values of PRB inter-OCC can also be specified using a cyclic shift a (e.g., exp(j a m), exp(j 2 p m / N), etc.).

[0307] In the case of PRB inter-OCC length 2, PRB inter-OCC can also be Rel. 15 time domain OCC (two-symbol OCC). PRB inter-OCC can also be specified using a cyclic shift a = {0, p}.

[0308] In the case of PRB inter-OCC length 4, PRB inter-OCC can be specified either by a table or using a cyclic shift. PRB inter-OCC can also be specified using a cyclic shift a = {0, p / 2, p, 3p / 2}.

[0309] In the case of PRB inter-OCC length 3, PRB inter-OCC can be specified either using a cyclic shift a = {0, p / 3, 2p / 3} or by a table containing values according to the cyclic shift. The cyclic shift a can also be {0, -p / 3, -2p / 3}.

[0310] For example, based on the table of Figure 6A Since the CSI-RS with PRB inter-OCC [+1 +1] with OCC index = 0 is the same as the CSI-RS without PRB inter-OCC, it is received and measured by the same operation as Rel. 15, and is received by Rel. 15 UEs and new version UEs. The CSI-RS with PRB inter-OCC [+1 -1] with OCC index = 1 can also be received and measured only by new version UEs.

[0311] For example, based on the table of Figure 6BThe table, since the CSI-RS to which PRB inter-OCC with OCC index = 0 is applied [exp(j0·0) exp(j0·1) exp(j0·2)] ([+1 +1 +1] same) is the same as the CSI-RS to which PRB inter-OCC is not applied, is received and measured by the same operation as Rel. 15, and is received by the UE of Rel. 15 and the new version UE. The CSI-RS to which PRB inter-OCC with OCC index = 1, 2 is applied is received and measured only by the new version UE.

[0312] For example, based on the table, since the CSI-RS to which PRB inter-OCC with OCC index = 0 is applied [exp(j0·0) exp(j0·1) exp(j0·2)] ([+1 +1 +1] same) is the same as the CSI-RS to which PRB inter-OCC is not applied, is received and measured by the same operation as Rel. 15, and is received by the UE of Rel. 15 and the new version UE. The CSI-RS to which PRB inter-OCC with OCC index = 1, 2, 3 is applied is received and measured only by the new version UE. Figure 6C

[0313] UE operation

[0314] The UE (for example, the new version UE) that supports PRB inter-OCC can also measure the CSI-RS obtained by multiplying the values within the PRB inter-OCC by each PRB, and adding (in-phase combining) the obtained multiple multiplication results.

[0315] The UE (for example, the old version UE) that does not support PRB inter-OCC or is not configured with PRB inter-OCC can also measure the CSI-RS obtained by adding the received signals of each PRB of the multiple PRBs.

[0316] The UE can also not assume that only a part of the time and frequency resources of the CSI-RS to which PRB inter-OCC is applied and the time and frequency resources of the CSI-RS of the other UE are repeated. For example, as shown in Figure 7A the UE can also not assume a case where the new version CSI-RS is mapped to PRB #0, 1 to which PRB inter-OCC is applied, and the old version CSI-RS is mapped to PRB #1. In such a case, the new version CSI-RS is not orthogonal (cannot be separated by the UE) to the old version CSI-RS.

[0317] The entire time and frequency resources of the CSI-RS to which PRB inter-OCC is applied and the entire time and frequency resources of the CSI-RS of the other UE can also be repeated. For example, as shown in Figure 7B ​As shown, the new version CSI-RS can be mapped to PRB #0, 1 with the application of inter-PRB OCC, and the old version CSI-RS can be mapped to PRB #0, 1. In such a case, the new version CSI-RS is orthogonal to the old version CSI-RS (can be separated by the UE).

[0318] The transmission bandwidth (PRB number) of the CSI-RS can also be a multiple of the inter-PRB OCC length. The UE can also assume that the transmission bandwidth (PRB number) of the CSI-RS is a multiple of the inter-PRB OCC length. The UE can also measure the CSI-RS by applying the inter-PRB OCC across a bandwidth that is a multiple of the inter-PRB OCC length.

[0319] The old version UE can add the received signal of each PRB across a multiple of the inter-PRB OCC length, and thus can measure only the CSI-RS that is not applied with the inter-PRB OCC (corresponding to all inter-PRB OCCs with a value of +1), and remove the CSI-RS corresponding to other inter-PRB OCCs.

[0320] In the case where the transmission bandwidth of the CSI-RS 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, and not measure the remaining bandwidth. For example, in the case where the inter-PRB OCC length is 2, the UE can measure the received signal of the CSI-RS resource by applying the inter-PRB OCC per 2 PRBs (can apply the corresponding value of the inter-PRB OCC to each of the received signals of the 2 PRBs). The UE can not measure the remaining bandwidth that is less than 2 PRBs.

[0321] Even in the aforementioned Figure 7B In such a case, the old version UE can not be able to properly measure the CSI-RS if it does not know the inter-PRB OCC length, and the new version CSI-RS can become interference.

[0322] For a plurality of CSI-RSs transmitted using the same precoding, in the case where there is no channel variation, the measurement accuracy of the CSI-RS is improved by co-phasing the CSI-RSs.

[0323] The old version UE can co-phase the received signals (complex numbers) of the CSI-RS of each PRB within the PRG. Through this operation, the old version UE can measure the CSI-RS by the same reception operation as in the case where all +1 inter-PRB OCCs are applied, even if it does not know that the inter-PRB OCC is applied. Thus, the old version CSI-RS and the new version CSI-RS are orthogonalized.

[0324] The inter-PRB OCC length can also be the number of PRBs within a PRG. It can also be that the CSI-RS is mapped to all PRBs within a PRG, and inter-PRB OCC is applied.

[0325] The inter-PRB OCC length can also be the number of PRBs within a PRG to which the CSI-RS is mapped. For example, assume that 1 PRG is 4 PRBs, the CSI-RS is mapped to 2 PRBs within a PRG, and the inter-PRB OCC length is 2. In this case, the legacy UE measures the CSI-RS by coherently combining the received signals of the CSI-RS within the PRG, and thus performs a reception operation equivalent to the case where the inter-PRB OCC [+1 +1] is applied, even if it does not know that the inter-PRB OCC is applied. Thus, the legacy UE can suppress interference from the new version CSI-RS and measure the legacy CSI-RS. In this case, the new version UE, since it knows that the inter-PRB OCC is applied, applies the inter-PRB OCC [+1 -1], and measures the CSI-RS by coherently combining the received signals of the CSI-RS within the PRG. Thus, the new version UE can suppress interference from the legacy CSI-RS and measure the new version CSI-RS.

[0326] In the case where the number of PRBs within a PRG is not a multiple of the inter-PRB OCC length, the UE can measure only a bandwidth that is a multiple of the inter-PRB OCC length in the PRG, and not measure the remaining bandwidth.

[0327] [Measurement of the entire resource range]

[0328] In a resource in the same time and frequency as the CSI-RS to which the inter-PRB OCC is applied or the CSI-RS to which the inter-PRB OCC is not applied, it is possible to transmit the CSI-RS to which the inter-PRB OCC is applied to another UE. The UE can measure the CSI-RS corresponding to a specific inter-PRB OCC by receiving the CSI-RS within a resource range (e.g., a bandwidth) to which the inter-PRB OCC can be applied.

[0329] In the example of Figure 8 , the CSI-RS #0-0 in PRB #0 and the CSI-RS #1-0 in PRB #1 are mapped to the same position within the same slot within each PRB, and have the same CSI-RS sequence (transmission signal sequence).

[0330] A UE configured with a CSI-RS resource to which PRB inter-OCC with all values of +1 (e.g., [+1 +1]) is applied, or a UE configured with a CSI-RS resource to which PRB inter-OCC is not applied, can also measure the CSI-RS in each PRB without using PRB inter-OCC if the CSI-RS of other UEs multiplexed to the time and frequency resources of the CSI-RS is not transmitted.

[0331] In a case where PRB inter-OCC can be applied, a UE cannot correctly measure the CSI-RS in each PRB if it does not know the PRB inter-OCC.

[0332] A UE can measure the CSI-RS corresponding to a specific PRB inter-OCC by applying all values of +1 of the specific PRB inter-OCC to the received signal of the entire resource range to which PRB inter-OCC can be applied.

[0333] The resource range to which PRB inter-OCC can be applied can be specified in the specification or configured to the UE through higher layer signaling. The resource range can be indicated by 2-PRB units (pairs of even PRB indices and odd PRB indices), 3-PRB units, 4-PRB units. The UE can determine the resource range to which PRB inter-OCC is applied based on the configured band (PRB) of the CSI-RS resource.

[0334] The UE can be notified of whether PRB inter-OCC is applied through at least one of higher layer signaling, MAC CE, and DCI. The UE can switch the reception operation according to the notification. For example, a UE notified that PRB inter-OCC is not applied (or the time and frequency resources of the CSI-RS are not mapped to the CSI-RS of other UEs) can measure the CSI-RS in each of at least one PRB within the resource range or can co-phase multiple PRBs within the CSI-RS resource. For example, a UE notified that PRB inter-OCC is applied (or the time and frequency resources of the CSI-RS are mapped to the CSI-RS of other UEs) can determine PRB inter-OCC based on the received signal of the entire PRB and measure the CSI-RS to which the determined PRB inter-OCC is applied.

[0335] According to this embodiment, by applying PRB inter-OCC to the CSI-RS across multiple PRBs, it is possible to increase the number of CSI-RS (ports) that are orthogonalized (multiplexed).

[0336] <Embodiment A2>

[0337] Time field inter-OCC

[0338] OCCs (Original Code Correction) for multiple time fields across the time domain (time domain OCC, inter-time field OCC) can also be applied to CSI-RS. Values ​​(elements) within the 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.

[0339] OCC (Optical Character Classification) between time fields can also be applied to consecutive time fields. For example, ... Figure 9 As shown, it can also be that the time field is a time slot, and the OCC (inter-slot OCC) is a time slot with a length of 2 [w t (0) w t (1)] is applied to time slot #0 and time slot #1. [w t (0) w t (1)] can also be [+1 +1] or [+1 -1].

[0340] The OCC between time fields can also be defined similarly to the OCC between PRBs in Implementation A1, specifying the association between the OCC index i and the values ​​of the OCC between time fields according to the length of each OCC between time fields (e.g., a table). The values ​​of the OCC between time fields 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 OCC between time fields 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 through a table containing values ​​obtained according to 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 through a table or using a circular shift α = {0, π / 2, π, 3π / 2}. Similar to the case where the OCC length is 3, the order of the values ​​of the cyclic shift α can also be changed.

[0341] OCC (Optical Common Coding) between time fields can also be applied to non-contiguous time fields. Non-contiguous time fields can be multiple time fields with an even number of indexes within a period defined in the CSI-RS resource, multiple time fields with an odd number of indexes within a period defined in the CSI-RS resource, multiple time fields with an interval of a certain number of time fields within a period defined in the CSI-RS resource, or they can be specified sequentially starting from the earliest (with the smallest index) or the last (with the largest index) time field within a period defined in the CSI-RS resource.

[0342] In the case where CSI-RS is mapped to only odd-indexed time fields or even-indexed time fields, inter-time field OCC can also not be applied. In the case where CSI-RS is mapped to only odd-indexed time fields or even-indexed time fields, inter-time field OCC can also be applied. In this case, orthogonality other than inter-time field OCC can be ensured, and a decrease in measurement quality can be prevented.

[0343] The inter-time field OCC length can also be the number of time fields (e.g., slots) within an application period (e.g., radio frame) composed of the number of time fields given by

[0344] In the case where sequence hopping is performed for CSI-RS within an application period, the case where orthogonality between a plurality of inter-time field OCCs multiplexed within the application period is destroyed is considered. Therefore, in the range of resources to which inter-time field OCC can be applied, sequence hopping can also be stopped.

[0345] The CSI-RS sequence can also be a Pseudo-Random (Pseudo-Noise (PN) sequence, e.g., Gold sequence, Gold sequence of length 31, M-sequence). In Rel. 15, the initial value c init based on a slot index and a symbol index.

[0346] In the case where inter-time field OCC (inter-slot OCC) is applied across an application period and within a slot, sequence hopping within the application period can also be stopped (c init can also be applied to all symbols within the application period).

[0347] Since c init is set to be UE-specific, a network (e.g., base station) sets a scrambling ID (e.g., scramblingID) for c init to a UE through higher layer signaling, so that sequence hopping is not performed within the application period.

[0348] “UE Operation”

[0349] A UE (e.g., new version UE) supporting inter-time field OCC can also measure a CSI-RS obtained by multiplying values within the inter-time field OCC by each time field and adding (in-phase combining) the resulting multiplication results.

[0350] A UE (e.g., old version UE) not supporting inter-time field OCC or not set with inter-time field OCC can also measure a CSI-RS obtained by adding received signals of each time field of a plurality of time fields.

[0351] The UE can also not assume that the time and frequency resources of the CSI-RS to which inter-time-field OCC is applied are repeated in part with the time and frequency resources of the CSI-RS of other UEs.

[0352] The entirety of the time and frequency resources of the CSI-RS to which inter-time-field OCC is applied can also be repeated with the entirety of the time and frequency resources of the CSI-RS of other UEs.

[0353] The duration of the CSI-RS (the number of time fields) can also be a multiple of the inter-time-field OCC length.

[0354] An old version UE can measure only the CSI-RS to which inter-time-field OCC is not applied (corresponding to all inter-time-field OCCs with a value of +1) by adding the received signal per time field across a multiple of the inter-time-field OCC length, and can remove the CSI-RS corresponding to other inter-time-field OCCs.

[0355] In the case where the transmission bandwidth of the CSI-RS is not a multiple of the inter-time-field OCC length, the UE can measure only the period of the CSI-RS that is a multiple of the inter-time-field OCC length, and can not measure the remaining period.

[0356] [Measurement of the entire resource range]

[0357] In the same time and frequency resources as the CSI-RS to which inter-time-field OCC is applied or the CSI-RS to which inter-time-field OCC is not applied, the CSI-RS to which inter-time-field OCC is applied can be transmitted for other UEs. The UE can measure the CSI-RS corresponding to a specific inter-time-field OCC by receiving the CSI-RS within the resource range (e.g., period) to which inter-time-field OCC can be applied.

[0358] A UE to which a CSI-RS resource to which all inter-time-field OCCs with a value of +1 (e.g., [+1 +1]) are applied is set, or a UE to which a CSI-RS resource to which inter-time-field OCC is not applied is set, can measure the CSI-RS in each time field without using inter-time-field OCC if the CSI-RS of other UEs that are multiplexed to the time and frequency resources of the CSI-RS is not transmitted.

[0359] In the case where inter-time-field OCC can be applied, the UE cannot correctly measure the CSI-RS in each time field if it does not know the inter-time-field OCC.

[0360] The UE can also measure the CSI-RS corresponding to the specific inter-time-field OCC by applying all the specific inter-time-field OCCs with a value of +1 to the received signal of the entire resource range to which the inter-time-field OCC can be applied.

[0361] The resource range to which the inter-time-field OCC can be applied can be specified in the specification or configured to the UE through higher layer signaling. The resource range can also be indicated by 2-time-field units (pairs of even and odd time-field indices), 3-time-field units, 4-time-field units. The UE can also determine the resource range to which the inter-time-field OCC is applied based on the duration (number of symbols) of the configured CSI-RS resource.

[0362] The UE can also be notified of whether the inter-time-field OCC is applied through at least one of higher layer signaling, MAC CE, and DCI. The UE can also switch the reception operation according to the notification. For example, the UE notified that the inter-time-field OCC is not applied (or the time and frequency resources of the CSI-RS are not multiplexed to the CSI-RS of other UEs) can measure the CSI-RS in each of at least one time field within the resource range or co-phases the multiple time fields within the CSI-RS resource. For example, the UE notified that the inter-time-field OCC is applied (or the time and frequency resources of the CSI-RS are multiplexed to the CSI-RS of other UEs) can determine the inter-time-field OCC based on the received signal of the entire time field, measure the CSI-RS of the determined inter-time-field OCC applied.

[0363] According to this embodiment, by applying the inter-time-field OCC to the CSI-RS across multiple time fields, it is possible to increase the number of CSI-RS (ports) orthogonalized (multiplexed).

[0364] <Embodiment A3>

[0365] Rel. 15 supports a maximum of 32 CSI-RS ports using 32 resources (REs, subcarriers x symbols) within 1 PRB. It is also possible to increase the number of CSI-RS ports by increasing the time and frequency resources per PRB.

[0366] The UE can also receive the CSI-RS using at least one resource (time and frequency resources) that is not used for the CSI-RS (existing CSI-RS resource) of Rel. 15. For example, Figure 10As shown, for existing CSI-RS resources, new CSI-RS resources (additional CSI-RS resources) can also be specified for symbols #2, #3, #9, and #10. This allows the use of 64RE CSI-RS resources within 1 PRB, associated with port 64.

[0367] For additional CSI-RS resources, at least one of time-domain OCC and frequency-domain OCC can be applied.

[0368] To ensure compatibility with Rel.15, for CSI-RS, after applying at least one of the time-domain OCC and frequency-domain OCC of Rel.15, at least one additional time-domain OCC and frequency-domain OCC (additional OCC) can also be applied.

[0369] 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 increments of 2 symbols.

[0370] 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)。

[0371] Append the first value of OCC (e.g., w) t '(0)' is always +1, and the value of CSI-RS does not change even if an OCC is applied. Therefore, the first value of the OCC can also be applied to an existing CSI-RS resource (e.g., w). t '(0)), for adding CSI-RS resources, apply an additional OCC value that is later than the first one (e.g., w) t (1) Thus, while the old version of the UE can measure CSI-RS, the number of ports of the new version of CSI-RS can be increased.

[0372] [w t '(0) w t [(1)] It can be applied either in order from the larger symbol index to the smaller symbol index, or in order from the smaller symbol index to the larger symbol index. For example, w can also be applied to symbol #2 and #3.t (0), and w is applied to symbols #4, #5 t (1).

[0373] According to this embodiment, the time and frequency resources of the CSI-RS can be increased, and the number of CSI-RS ports can be increased.

[0374] <Embodiment A4>

[0375] In Rel. 15, the UE does not assume that the REs of the CSI-RS are the same as the REs of the DMRS. Thus, the flexibility of the setting of at least one of the CSI-RS and the DMRS is low.

[0376] The CSI-RS can also be punctured.

[0377] In the present disclosure, the CSI-RS is punctured, and a part of the time and frequency resources of the CSI-RS to which the CSI-RS is mapped and a part of the CSI-RS which is not transmitted can also be overwritten with each other.

[0378] In the resources to which the CSI-RS is mapped without being punctured for a certain UE, the signals (for example, CSI-RS) of other UEs can also be transmitted.

[0379] The puncturing can also be performed in units of time and frequency resources (for example, component resources, resources to which a frequency domain OCC is applied, resources to which a time domain OCC is applied) of a certain size.

[0380] With respect to the CSI-RS, the CSI-RS can also be transmitted based on at least one of the following CSI-RS resource control methods 1 to 3.

[0381] <CSI-RS Resource Control Method 1>

[0382] The NZP-CSI-RS can also be punctured in a zero power (ZP)-CSI-RS which is set. The NZP-CSI-RS can also be mapped to resources in the resources set for the NZP-CSI-RS other than the resources set for the ZP-CSI-RS.

[0383] In case that the time and frequency resources of ZP-CSI-RS overlap with at least part of the time and frequency resources of NZP-CSI-RS, the UE can not receive NZP-CSI-RS in the overlapped REs, can not receive NZP-CSI-RS in the overlapped PRBs, can not receive ZP-CSI-RS in the overlapped REs, can not receive ZP-CSI-RS in the overlapped PRBs, can not assume that DMRS is configured (or mapped) to the overlapped resources, can measure (receive) at least one of ZP-CSI-RS and NZP-CSI-RS in the overlapped resources in case that DMRS is configured (or mapped) to the overlapped resources, and can measure (receive) DMRS in the overlapped resources in case that DMRS is configured (or mapped) to the overlapped resources.

[0384] Method 2 for CSI-RS resource control

[0385] The UE can also be informed of a bitmap indicating the locations (e.g., locations of at least one of time and frequency) of puncturing in the time and frequency resources of CSI-RS. The bitmap can also be included in the CSI-RS resource. The UE can also puncture CSI-RS in the locations indicated by the bitmap. The UE can puncture NZP-CSI-RS in the locations indicated by the bitmap, and can puncture ZP-CSI-RS.

[0386] Each bit in the bitmap can correspond to an RE (subcarrier), or can correspond to a PRB. The UE can not receive NZP-CSI-RS in the REs indicated by the bitmap, or can not receive NZP-CSI-RS in the PRBs indicated by the bitmap. The UE can not receive ZP-CSI-RS in the REs indicated by the bitmap, or can not receive ZP-CSI-RS in the PRBs indicated by the bitmap. DMRS can not be configured (or mapped) to the resources indicated by the bitmap. The UE can not assume that DMRS is configured (or mapped) to the resources indicated by the bitmap. DMRS can be configured (or mapped) to the resources indicated by the bitmap, and the UE can receive or measure DMRS in the resources indicated by the bitmap.

[0387] Method 3 for CSI-RS resource control

[0388] In case that CSI-RS is punctured based on Method 1 or 2 for CSI-RS resource control, PDSCH can not be transmitted (or can not be mapped) in the resources where CSI-RS is not mapped due to puncturing.

[0389] In resources where CSI-RS is mapped without puncturing, PDSCH can still be rate-matched or punctured. The UE can also assume that PDSCH in this resource will be rate-matched or punctured.

[0390] In resources mapped to CSI-RS without puncturing, PDSCH may not be rate-matched or punctured. The UE may also envision that PDSCH in such resources will not be rate-matched or punctured. PDSCH can still be transmitted in resources mapped to CSI-RS without puncturing (PDSCH can also be mapped to such resources).

[0391] The UE can also be notified of the location where the PDSCH is rate-matched or punctured. The location where the PDSCH is rate-matched or punctured 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).

[0392] According to this implementation, CSI-RS is appropriately punched, and resources that are not mapped to CSI-RS through punching are appropriately processed, thereby improving the flexibility of CSI-RS settings.

[0393] <Implementation Method A5>

[0394] 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).

[0395] Multiple CSI-RS resource groups can also be grouped using at least one of the following CSI-RS resource grouping methods 1 and 2.

[0396] CSI-RS Resource Grouping Method 1

[0397] Among multiple CSI-RS resource groups, at least one resource used for CSI-RS time and frequency can also be different.

[0398] 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 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 added CSI-RS resource.

[0399] It can also be used for, for example Figure 1 The table can be appended with entries (rows) containing groups that have added CSI-RS resources. It can also be appended with entries representing more than 32 ports.

[0400] In the table representing existing CSI-RS resources and additional CSI-RS resources, additional CSI-RS resources can be added to both entries representing the number of ports below 32 (lower-order port count) and entries representing the number of ports above 32 (higher-order port count), or only entries representing the number of high-order ports can be added.

[0401] 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 by using at least one offset of time and frequency. For example, in the aforementioned... Figure 12 In the example, the UE decides to add CSI-RS resources by adding a -2 symbol offset to the existing CSI-RS resources in the time direction.

[0402] Multiple CSI-RS resource groups are orthogonalized through time and frequency resources, enabling the UE to receive data without using the new OCC, thus improving compatibility with older UE versions.

[0403] CSI-RS Resource Grouping Method 2

[0404] Among multiple CSI-RS resource groups, the CSI-RS sequence, and the initial value c used in the determination of the CSI-RS sequence. init At least one of the scrambling IDs can be different.

[0405] 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.

[0406] The association between at least one CSI-RS sequence and scrambling ID, and at least one CSI-RS resource and CSI-RS port, 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 initThe CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c init The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c init The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c init The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c

[0407] The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c init The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c init The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c

[0408] The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c init The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c init The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c init The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c init The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c init The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c init The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c init The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c

[0409] The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c

[0410] The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c

[0411] The CSI-RS of ports #X~#2X-1 is determined based on the table and the transformation c Figure 13In the case of the example, the UE adds an offset of 0 symbols in the time direction and an offset of 0 PRBs in the frequency direction to the existing CSI-RS resource, thereby determining the time and frequency resources of the additional CSI-RS. The UE can also conceive that the additional CSI-RS resource is completely duplicated with the existing CSI-RS resource in time and frequency.

[0412] Since the multiple CSI-RS resource groups are distinguished by the CSI-RS sequence, the UE can receive without using a new OCC, and compatibility with the old version UE can be improved. Even if the CSI-RS sequence (pseudo-random sequence) is not completely orthogonal, interference between ports can be suppressed by applying different precoding (beam) between ports.

[0413] <Research>

[0414] It is difficult to share the same CSI-RS resource between the existing (for example, Rel. 15-18, up to 32 ports) CSI-RS and the new (for example, Rel. 19, more than 32 ports) CSI-RS. Since the existing UE cannot de-spread the new TD-OCC / FD-OCC, the base station needs to set a dedicated set of CSI-RS resources for the existing (for example, Rel. 15-18) UE and the new (for example, Rel. 19) UE. This causes CSI-RS overhead. If the CSI-RS overhead is to be reduced, it is possible to limit the improvement in performance of more than 23 CSI-RS ports.

[0415] <Embodiment B1>

[0416] It can also be that more than 32 ports are not introduced to the same CSI-RS resource (time and frequency resources), and different multiple CSI-RS resources use different CSI-RS ports. It can also be that, for the new UE, multiple CSI-RS resources are aggregated.

[0417] For example, it can also be that 2 CSI-RS resources are set, 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 case, it becomes easy to share the CSI-RS resource between the existing UE and the new UE. For example, it can also be that the first CSI-RS resource is set for the existing UE, and both the first CSI-RS resource and the second CSI-RS resource are set for the new UE.

[0418] According to this embodiment, by changing the definition of the CSI-RS port mapping, it is possible to define more than 32 CSI-RS ports, and it is possible to reduce the impact on the specification.

[0419] AsFigure 14 As an example, CSI-RS resource #1 and CSI-RS resource #2 can be configured to be FDMed, CSI-RS resource #1 is associated with CSI-RS ports #0 to #31, and CSI-RS resource #2 is associated with CSI-RS ports #32 to #63.

[0420] As an example, CSI-RS resource #1 and CSI-RS resource #2 can be configured to be TDMed, CSI-RS resource #1 is associated with CSI-RS ports #0 to #31, and CSI-RS resource #2 is associated with CSI-RS ports #32 to #63. Figure 15 As an example, CSI-RS resource #1 and CSI-RS resource #2 can be configured to be TDMed, CSI-RS resource #1 is associated with CSI-RS ports #0 to #31, and CSI-RS resource #2 is associated with CSI-RS ports #32 to #63.

[0421] The size of the time resource of each CSI-RS resource can also be a slot / sub-slot / subframe. The size of the frequency resource of each CSI-RS resource can also be a PRB / 2 N N = -2, -1, 1, 2,...).

[0422] The method of mapping more than 32 CSI-RS ports across multiple CSI-RS resources can also follow at least one of the following several embodiments B1-X.

[0423] <<Embodiment B1-1>>

[0424] In the case where the UE is configured with a higher layer parameter that activates (validates) more than 32 CSI-RS ports, and the UE is configured with x CSI-RS ports and y CSI-RS resources, the UE can also follow at least one of the following several rules to map the CSI-RS ports. X can also be 32 or less.

[0425] - The 1st resource within the y CSI-RS resources (or CSI-RS resource set) can also be mapped to CSI-RS ports #0 to #x-1.

[0426] - The 2nd resource within the y CSI-RS resources (or CSI-RS resource set) can also be mapped to CSI-RS ports #x to #2x-1.

[0427] - The 3rd resource within the y CSI-RS resources (or CSI-RS resource set) can also be mapped to CSI-RS ports #2x to #3x-1.

[0428] - The i-th resource in the y CSI-RS resources (or CSI-RS resource set) can also be mapped to CSI-RS ports # (i-1) x to #ix-1. The i-th resource can be either a CSI-RS resource corresponding to the i-th time resource (e.g., slot) or a CSI-RS resource corresponding to the i-th frequency resource (e.g., PRB).

[0429] <<Embodiment B1-2>>

[0430] The aggregated multiple CSI-RS resources can also be associated with more than 32 CSI-RS ports. Each CSI-RS resource can also be associated with 32 or less CSI-RS ports. The multiple CSI-RS resources for aggregation can also follow at least one of several options as follows.

[0431] - Option 1: The number of CSI-RS resources for aggregation is M. For example, M can also be 2.

[0432] - Option 2: The number of ports associated with each CSI-RS resource for aggregation is fixed to N or more than O (O or above). For example, N can also be 32. For example, O can also be 16.

[0433] - Option 3: The multiple CSI-RS resources for aggregation can also be configured within the same CSI-RS resource set or CSI-RS resource group.

[0434] - Option 4: The multiple CSI-RS resources for aggregation can also have at least one of the same configuration of density, number of ports, time operation configuration, frequency resource configuration, time resource configuration, QCL assumption, scrambling ID, new scrambling ID. The time operation configuration can also mean P or SP or AP. The frequency resource configuration can be either wideband level or RB level. The wideband level can be the number of PRBs and the starting PRB. The time resource configuration can be slot level. The QCL assumption can be the associated SSB. The multiple CSI-RS resources for aggregation can also have at least one of the different configuration of time resource configuration, frequency resource configuration, scrambling ID.

[0435] - Option 5: The multiple CSI-RS resources for aggregation can be either within M or less consecutive slots or within consecutive / comb-like frequency resources.

[0436] - Example: Also, M=2 CSI-RS resources can be aggregated, associated with 64 CSI-RS ports. Each CSI-RS resource can also be associated with 32 CSI-RS ports. The 2 CSI-RS resources are within the same CSI-RS resource set or group, have the same frequency resource configuration, and are configured in 2 consecutive slots.

[0437] <<Embodiment B1-3>>

[0438] In the multiple CSI-RS resources aggregated with more than 32 ports, several parameters can be additionally set, or the existing parameters can be rewritten. For example, the several parameters can be at least one of density, new scrambling ID, number of PRBs, starting PRB, and the like. In order to reduce the complexity of UE measurement, a density smaller than the existing density can also be set.

[0439] <Layout of base station antenna>

[0440] Figure 16 is a table indicating the association of the number of supported CSI-RS ports and the setting of the layout of base station antenna ((N1, N2) and (O1, O2)) for a single panel of the existing specification. Figure 17 is a table indicating the association of the number of supported CSI-RS ports and the setting of the layout of base station antenna ((N g , N1, N2) and (O1, O2)) for a multiple panel of the existing specification.

[0441] <Setting / measurement / reporting of CSI>

[0442] The UE can also measure the CSI-RS (resource) using the port to which at least one of Embodiments A1 to A5 and Embodiment B1 is applied, thereby obtaining the CSI. The setting / reporting of the CSI can also follow at least one of the following Embodiments C1 and C2.

[0443] <Embodiment C1>

[0444] This embodiment relates to the aforementioned Research 1.

[0445] For the new layout and setting of the CSI-RS using more than 32 ports, at least one of the following several options can also be followed.

[0446] - Option 1

[0447] It can also be that new (N1, N2) and new (O1, O2) are defined in the specification and set to the UE. It can also be that new rows are added to the existing table. It can also be that the new rows are used only in the case where CSI-RS using more than 32 ports for CSI codebook is set. It can also be that a new table is added separately from the existing table. It can also be that the new table is used only in the case where CSI-RS using more than 32 ports for CSI codebook is set, and otherwise the existing table is used.

[0448] Figure 18 An example of the setting involved in Option 1 of Embodiment C1 is shown. It can also be that at least one row in the table is supported. The table shows combinations (rows) of the number of CSI-RS ports (>32), (N1, N2), (O1, O2).

[0449] - Option 2

[0450] (N1, N2) and (O1, O2) of the existing (N1, N2) and (O1, O2) is shown. (N1, N2) and (O1, O2) can also be different for different (N1, N2). g A new parameter ng can also be added to the setting. The new setting can also be defined in the specification and set to the UE.

[0451] N g It can also be set as a separate parameter from the (N1, N2) setting. For example, two parameters ng and n1-n2 representing N g and (N1, N2) can also be set. Figure 19 A first example of the setting involved in Option 2 of Embodiment C1 is shown. It can also be that at least one combination in the table is supported. The table shows combinations of the number of CSI-RS ports (>32), N g , (N1, N2), (O1, O2), the existing (N1, N2), (O1, O2), and a plurality of combinations. Different (N1, N2) can also be included in a dedicated row. (O1, O2) can also be different for different (N1, N2) as in the example of Option 1. For the row of, it can also be that the row of is not necessarily set by reusing the existing setting for more ports.

[0452] N g It can also be set as a joint new parameter with the (N1, N2) setting. For example, one parameter ng-n1-n2 representing (N g , N1, N2) can also be set. Figure 20 A second example of the setting involved in Option 2 of Embodiment C1 is shown. It can also be that at least one row in the table is supported. The table shows combinations of the number of CSI-RS ports (>32), new (N gMultiple combinations (rows) of (N1, N2), (O1, O2). For rows with *, existing multiple port settings can be reused instead of making rows with * mandatory.

[0453] UE can also recognize, through N g Only one dimension is extended. For example... Figure 21A For example, antenna arrays for 64 ports (N g The expression (N1, N2) = (2, 8, 2) can also refer to a horizontal arrangement of two antennas (N1, N2) = (8, 2). Figure 21B For example, antenna arrays for 128 ports (N g The arrangement (N1, N2) = (4, 8, 2) can also refer to a horizontal arrangement of four antennas (N1, N2) = (8, 2). In these examples, the spacing between two adjacent antenna elements in the horizontal or vertical direction is d.

[0454] - Option 3

[0455] (N) represents a combination of at least one of the existing (N1, N2) and (O1, O2) values. g1 N g2 The new parameters ng1-ng2 can also be appended to the settings. These new settings can also be defined in the specification and set for the UE.

[0456] (N) g1 N g2 ) can also be set as a separate parameter from (N1, N2). For example, it can also be set to represent (N1, N2) separately. g1 N g2 The two parameters ng1-ng2 and n1-n2 of (N1, N2) are given. Figure 22 This is the first example of the settings involved in option 3 of implementation method C1. Combinations of at least one of the items in this table can also be supported. This table indicates the number of CSI-RS ports (>32), (N... g1 N g2 There are multiple combinations of (N1, N2) and (O1, O2). For rows with *, existing multiple port settings can be reused instead of making rows with * mandatory.

[0457] (N) g1 N g2 ) can also be set as a new parameter joint with (N1, N2). For example, it can also be set to represent (N g1 N g2 A parameter ng1-ng2-n1-n2 of (N1, N2). Figure 23A second example of a configuration involved in Option 3 of Embodiment C1. At least one row in this table can also be supported. This table represents a plurality of combinations (rows) of the number of CSI-RS ports (>32), new (N g1 , N g2 , N1, N2), (O1, O2). For the row of, the row of can also be set as necessary by reusing the existing configuration of a larger number of ports.

[0458] The UE can also recognize that the 2 dimensions are extended by the (N g1 , N g2 ) values. N g1 may correspond to N1 (horizontal direction), and N g2 may correspond to N2 (vertical direction). As in the example of Figure 24A , the antenna arrangement for 128 ports (N g1 , N g2 , N1, N2) = (2, 2, 8, 2) can also mean 2 in the horizontal direction and 2 in the vertical direction antenna arrangement (N1, N2) = (8, 2). As in the example of Figure 24B , the antenna arrangement for 128 ports (N g1 , N g2 , N1, N2) = (4, 1, 8, 2) can also mean 4 in the horizontal direction and 1 in the vertical direction antenna arrangement (N1, N2) = (8, 2). In these examples, the interval between 2 antenna elements adjacent to the horizontal direction or the vertical direction is d.

[0459] <<Variation>>

[0460] The values of (O1, O2) for each value of (N1, N2) can be defined in the specification or can be configurable. The values of (O1, O2) can also follow at least one of the following several choices.

[0461] - Choice 1: The values of (O1, O2) are common in all ranks (layers).

[0462] - Choice 2: The values of (O1, O2) are different for different ranks. For example, (O1, O2) has a larger value for a lower rank, and (O1, O2) has a smaller value for a higher rank. 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.

[0463] According to this embodiment, the UE can be appropriately configured for the base station antenna arrangement of the CSI-RS using more than 32 ports.

[0464] <Embodiment C2>

[0465] This embodiment relates to Study 2 described above.

[0466] Together with CSI-RS using more than 32 ports, at least one of the following several CSI / codebooks can be supported and configured.

[0467] - Rel.15 Type 1 CSI (Type 1 Single Panel Codebook)

[0468] - Rel.15 Type 1 Multi-Panel CSI (Type 1 Multi-Panel Codebook)

[0469] - Rel.15 Type 2 CSI (Type 2 Codebook)

[0470] - Rel.15 Type 2 PS CSI (Type 2 Port Selection Codebook)

[0471] - Rel.16 Type 2 CSI (Extended Type 2 Codebook)

[0472] - Rel.16 Type 2 PS CSI (Extended Type 2 Port Selection Codebook)

[0473] - Rel.17 Type 2 PS CSI (Further Extended Type 2 Port Selection Codebook)

[0474] CSI-RS using more than 32 ports can also be supported only for one or more specific CSI codebooks. For example, the one or more specific CSI codebooks can also be at least one of Type 1 Single Panel Codebook and Type 1 Multi-Panel Codebook. Thereby, the specification / UE operation can be simplified.

[0475] CSI supporting CSI-RS using more than 32 ports can also be an extension of CJT- specific CSI (CJT-specific codebook). The CJT-specific CSI can also be at least one of Rel.18 CJT-specific Extended Type 2 CSI (CJT-specific Extended Type 2 Codebook) and Rel.18 CJT-specific Further Extended Type 2 PS CSI (CJT-specific Further Extended Type 2 PS Codebook). In contrast to Rel.18 CJT-specific CSI assuming dedicated SD basis per TRP, the CJT-specific CSI extended for CSI-RS using more than 32 ports can also assume common SD basis across multiple TRPs, like Mode 2 of the CJT CSI described above. The CSI for CSI-RS using more than 32 ports can also be an extension of Mode 2 of the CJT-specific CSI. Either of Mode 1 of the CJT-specific CSI and Mode 2 of the CJT-specific CSI for CSI-RS using more than 32 ports can be configured by a higher layer parameter and can also be switched.

[0476] The set (N1, N2) and (O1, O2) can be dependent on the type of codebook / CSI, or can be different according to the type of codebook / CSI. For example, in the type 1 multi-panel codebook, the setting of option 2 / 3 of embodiment C1 can also be applied. For example, in the type 1 single-panel codebook, the setting of option 1 / 2 / 3 of embodiment C1 can also be applied.

[0477] According to this embodiment, the UE can use an appropriate codebook / CSI for the CSI-RS using more than 32 ports.

[0478] [Supplement]

[0479] [Notification of information to the UE]

[0480] The notification of arbitrary information from the network (Network (NW)) (for example, from a base station (Base Station (BS))) to the UE (in other words, the reception of arbitrary information from the BS in the UE) in the above-described embodiments can also be performed using physical layer signaling (for example, DCI), high layer signaling (for example, RRC signaling, MAC CE), a specific signal / channel (for example, PDCCH, PDSCH, reference signal), or a combination thereof.

[0481] In the case where the above-described notification is performed by the MAC CE, the MAC CE can also be identified by being included in the MAC subheader by a new logical channel ID (Logical Channel ID (LCID)) that is not specified in the existing specification.

[0482] In the case where the above-described notification is performed by the DCI, the above-described notification can also be performed by a specific field of the DCI, a radio network temporary identifier (Radio Network Temporary Identifier (RNTI)) utilized in scrambling of cyclic redundancy check (Cyclic Redundancy Check (CRC)) bits assigned to the DCI, a format of the DCI, and the like.

[0483] Further, the notification of arbitrary information to the UE in the above-described embodiments can also be performed periodically, semi-persistently, or aperiodically.

[0484] [Notification of information from the UE]

[0485] The notification of any information from the UE (in other words, the transmission / reporting of any information to the BS in the UE) in the above-described embodiments can also be made using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0486] In a case where the above-described notification is made through a MAC CE, the MAC CE can also be identified by being included in a MAC subheader through a new LCID that is not specified in the existing specification.

[0487] In a case where the above-described notification is made through UCI, the above-described notification can also be transmitted using a PUCCH or a PUSCH.

[0488] Further, the notification of any information from the UE in the above-described embodiments can also be made periodically, semi-persistently, or aperiodically.

[0489] [Application of Each Embodiment]

[0490] At least one of the above-described embodiments can also be applied in a case where a specific condition is satisfied. The specific condition can be specified in a specification or can be notified to a UE / BS using higher layer signaling / physical layer signaling.

[0491] At least one of the above-described embodiments can also be applied only to a UE that reports or supports a specific UE capability.

[0492] The specific UE capability can also indicate at least one of the following:

[0493] • The UE supports a specific process / operation / control / information for at least one of the above-described embodiments.

[0494] • The UE supports 48, 64, 72, 96, or 128 ports for CSI measurement.

[0495] • The UE 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.

[0496] • The UE supports the configuration of at least one of ng-n1-n2 and (O1, O2) for more than 32 ports (48, 64, 72, 96, or 128 ports). The UE supports the configuration of at least one of ng-n1-n2 and (O1, O2) for a certain codebook / CSI type.

[0497] • The UE supports the configuration of at least one of ng1-ng2-n1-n2 and (O1, O2) for more than 32 ports (48, 64, 72, 96, or 128 ports). The UE supports the configuration of at least one of ng1-ng2-n1-n2 and (O1, O2) for a certain codebook / CSI type.

[0498] • The UE supports rank-specific (O1, O2) or rank-common (O1, O2).

[0499] In addition, the above-described specific UE capability can be a capability applied across all frequencies (commonly regardless of the frequency), a capability per frequency (e.g., one or a combination of a cell, a band, a band combination, a BWP, a component carrier, etc.), a capability per frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), a capability per SubCarrier Spacing (SCS), or a capability per Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0500] In addition, the above-described specific UE capability can be a capability applied across all full-duplex modes (commonly regardless of the duplex mode), a capability per duplex mode (e.g., Time Division Duplex (TDD), Frequency Division Duplex (FDD)).

[0501] In addition, at least one of the above-described embodiments can also be applied in a case where the UE is configured / activated / triggered by higher layer signaling / physical layer signaling with specific information associated with the above-described embodiments (or implements the action of the above-described embodiments). For example, the specific information can also be information indicating the activation of the action of the above-described embodiments, an arbitrary RRC parameter for a specific version (e.g., Rel. 18 / 19), etc.

[0502] The UE can also apply the operation of, for example, Rel. 15 / 16 in a case where at least one of the above-described specific UE capabilities is not supported or the above-described specific information is not set.

[0503] (Addendum)

[0504] With respect to an embodiment of the present disclosure, the following invention is added.

[0505] [Addendum 1]

[0506] A terminal has:

[0507] a reception unit that receives a configuration of a channel state information-reference signal (CSI-RS) using more than 32 ports; and

[0508] a control unit that measures a CSI based on the configuration,

[0509] the configuration indicates at least one of a combination of a number of horizontal antenna elements and a number of vertical antenna elements, a number of panels, the number of panels and the combination of the number of horizontal antenna elements and the number of vertical antenna elements, a number of horizontal panels and a number of vertical panels, and the combination of the number of horizontal antenna elements and the number of vertical antenna elements.

[0510] [Addendum 2]

[0511] The terminal according to Addendum 1, wherein

[0512] the configuration indicates any one of a combination of a number of horizontal oversampling and a number of vertical oversampling common to all ranks, and a combination of a number of horizontal oversampling and a number of vertical oversampling depending on a rank.

[0513] [Addendum 3]

[0514] The terminal according to Addendum 1 or Addendum 2, wherein

[0515] the control unit supports a part of a plurality of codebook types for a CSI-RS using 32 or less ports.

[0516] [Addendum 4]

[0517] The terminal according to any one of Addendum 1 to Addendum 3, wherein

[0518] the configuration is a codebook type indicating a codebook for coherent joint transmission.

[0519] (Wireless communication system)

[0520] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof is used for communication.

[0521] Figure 25 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (may be simply referred to as system 1) can be a system that realizes communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.

[0522] Further, the wireless communication system 1 can support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). The MR-DC can include E-UTRA-NR Dual Connectivity (EN-DC) of LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR, NR-E-UTRA Dual Connectivity (NE-DC) of NR and LTE, and the like.

[0523] In the EN-DC, a base station (eNB) of LTE (E-UTRA) is a Master Node (MN), and a base station (gNB) of NR is a Secondary Node (SN). In the NE-DC, a base station (gNB) of NR is an MN, and a base station (eNB) of LTE (E-UTRA) is an SN.

[0524] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity of both an MN and an SN being base stations (gNBs) of NR (NR-NR Dual Connectivity (NN-DC))).

[0525] The wireless communication system 1 can also have the base station 11 that forms a macro cell C1 with a wider coverage, and the base station 12 (12a-12c) that is configured within the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 can also be located within at least one cell. The configuration, number, and the like of the cells and the user terminal 20 are not limited to the illustrated manner. Hereinafter, the base stations 11 and 12 are collectively referred to as base stations 10 without distinction.

[0526] The user terminal 20 can also be connected to at least one of the plurality of base stations 10. The user terminal 20 can also use at least one of carrier aggregation (CA) using a plurality of component carriers (Component Carrier (CC)) and dual connectivity (DC).

[0527] Each CC can be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 can be included in the FR1, and the small cell C2 can be included in the FR2. For example, the FR1 can be a frequency band of 6 GHz or less (sub-6 GHz), and the FR2 can be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands, definitions, and the like of the FR1 and the FR2 are not limited to these, and for example, the FR1 can correspond to a frequency band higher than the FR2.

[0528] Furthermore, the user terminal 20 can use at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC to perform communication.

[0529] The plurality of base stations 10 can be connected by wire (for example, optical fiber based on Common Public Radio Interface (CPRI), X2 interface, or the like) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 that corresponds to a higher station can be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 that corresponds to a relay station (relay) can be referred to as an IAB node.

[0530] The base station 10 can also be connected to the core network 30 via other base stations 10 or directly. The core network 30 can include, for example, at least one of an Evolved Packet Core (EPC), a 5G core network (5GCN), a Next Generation Core (NGC), and the like.

[0531] The core network 30 can include, for example, at least one of a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), an Operation, Administration and Maintenance (OAM), and the like network functions (NFs). In addition, a plurality of functions can be provided by one network node. Furthermore, communication with an external network (for example, the Internet) can also be performed via a DN.

[0532] The user terminal 20 can also be a terminal that supports at least one of LTE, LTE-A, 5G, and the like communication methods.

[0533] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) can also be used. For example, in at least one of Downlink (DL) and Uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), and the like can also be used.

[0534] The wireless access scheme can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) can also be used in the wireless access schemes of UL and DL.

[0535] As a downlink channel, in the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared among the user terminals 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), and the like can also be used.

[0536] In addition, as an uplink channel, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared among the user terminals 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), and the like can also be used.

[0537] User data, higher layer control information, a system information block (SIB), and the like are transmitted through the PDSCH. User data, higher layer control information, and the like can also be transmitted through the PUSCH. Further, a master information block (MIB) can also be transmitted through the PBCH.

[0538] Lower layer control information can also be transmitted through the PDCCH. The lower layer control information may, for example, also include downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0539] In addition, the DCI that schedules the PDSCH can also be referred to as a DL assignment, a DL DCI, and the like, and the DCI that schedules the PUSCH can also be referred to as a UL grant, a UL DCI, and the like. In addition, the PDSCH can also be rewritten as DL data, and the PUSCH can also be rewritten as UL data.

[0540] In the detection of the PDCCH, a control resource set (CORESET) and a search space can also be utilized. The CORESET corresponds to a resource in which the DCI is searched for. The search space corresponds to a search area and a search method of the PDCCH candidate. One CORESET can also be associated with one or a plurality of search spaces. The UE can monitor the CORESET associated with a certain search space based on a search space setting.

[0541] One search space can also correspond to the PDCCH candidate equivalent to one or a plurality of aggregation levels. One or a plurality of search spaces can also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", and the like of the present disclosure can also be rewritten with each other.

[0542] By the PUCCH, uplink control information (Uplink Control Information (UCI)) including at least one of Channel State Information (CSI), delivery acknowledgement information (for example, also referred to as Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, and the like), and a Scheduling Request (SR) can also be transmitted. By the PRACH, a random access preamble for establishing a connection with a cell can also be transmitted.

[0543] In addition, in the present disclosure, downlink, uplink, and the like can also be described without the term "link". Furthermore, it can also be described without the term "Physical" at the beginning of various channels.

[0544] In the wireless communication system 1, a Synchronization Signal (SS), a Downlink Reference Signal (DL-RS), and the like can also be transmitted. As the DL-RS, a Cell-specific Reference Signal (CRS), a Channel State Information Reference Signal (CSI-RS), a DeModulation Reference Signal (DMRS), a Positioning Reference Signal (PRS), a Phase Tracking Reference Signal (PTRS), and the like can also be transmitted in the wireless communication system 1.

[0545] The synchronization signal can be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) can also be referred to as an SS / PBCH block, an SS block (SS Block (SSB)), and the like. In addition, the SS, the SSB, and the like can also be referred to as a reference signal.

[0546] Furthermore, in the wireless communication system 1, as the uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), and the like can also be transmitted. In addition, the DMRS can also be referred to as a user terminal-specific reference signal (UE-specific Reference Signal).

[0547] (Base station)

[0548] Figure 26 is a diagram that shows an example of a structure of a base station according to an embodiment. The base station 10 is provided with a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmission / reception unit 120, and the transmission / reception antenna 130, and the transmission path interface 140 can each be provided with one or more.

[0549] In addition, in this example, mainly the functional blocks of the characteristic portions in the present embodiment are shown, and it can also be assumed that the base station 10 also has other functional blocks required for wireless communication. A part of the processing of each unit described below can also be omitted.

[0550] The control unit 110 implements control of the entire base station 10. The control unit 110 can be constituted by a controller, a control circuit, or the like based on common knowledge in the technical field to which the present disclosure pertains.

[0551] The control unit 110 can also control generation, scheduling (for example, resource allocation, mapping), and the like of signals. The control unit 110 can also control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140. The control unit 110 can also generate data, control information, a sequence, and the like transmitted as signals, and forward them to the transmission / reception unit 120. The control unit 110 can also perform call processing (setting, release, and the like) of a communication channel, state management of the base station 10, management of wireless resources, and the like.

[0552] The transmission / reception unit 120 can also include a baseband unit 121, a radio frequency (RF) unit 122, a measurement unit 123. The baseband unit 121 can also include a transmission processing unit 1211 and a reception processing unit 1212. The transmission / reception unit 120 can be constituted by a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit and the like which are explained based on common knowledge in the technical field to which the present disclosure pertains.

[0553] The transmission / reception unit 120 can be constituted as an integrated transmission / reception unit, or can be constituted by a transmission unit and a reception unit. The transmission unit can be constituted by the transmission processing unit 1211, the RF unit 122. The reception unit can be constituted by the reception processing unit 1212, the RF unit 122, the measurement unit 123.

[0554] The transmission / reception antenna 130 can be constituted by an antenna, for example, an array antenna and the like which are explained based on common knowledge in the technical field to which the present disclosure pertains.

[0555] The transmission / reception unit 120 can also transmit the downlink channel, the synchronization signal, the downlink reference signal and the like described above. The transmission / reception unit 120 can also receive the uplink channel, the uplink reference signal and the like described above.

[0556] The transmission / reception unit 120 can also form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation) and the like.

[0557] The transmission / reception unit 120 (transmission processing unit 1211) can also, for example, perform processing at a Packet Data Convergence Protocol (PDCP) layer, processing at a Radio Link Control (RLC) layer (for example, RLC retransmission control), processing at a Medium Access Control (MAC) layer (for example, HARQ retransmission control) and the like on data, control information and the like acquired from the control unit 110, to generate a bit string to be transmitted.

[0558] The transmission / reception unit 120 (transmission processing unit 1211) can also perform transmission processing such as channel coding (which can include error correction coding), modulation, mapping, filter processing (filtering), Discrete Fourier Transform (DFT) processing (as necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, digital-analog conversion, and the like on a bit string to be transmitted, and output a baseband signal.

[0559] The transmission / reception unit 120 (RF unit 122) can also perform modulation to a radio band, filter processing, amplification, and the like on the baseband signal, and transmit a signal of the radio band via the transmission / reception antenna 130.

[0560] On the other hand, the transmission / reception unit 120 (RF unit 122) can also perform amplification, filter processing (filtering), demodulation to a baseband signal, and the like on a signal of the radio band received by the transmission / reception antenna 130.

[0561] The transmission / reception unit 120 (reception processing unit 1212) can also apply reception processing such as analog-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as necessary), filter processing (filtering), demapping, demodulation, decoding (which can include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, and the like to the obtained baseband signal, and acquire user data and the like.

[0562] The transmission / reception unit 120 (measurement unit 123) can also perform measurements related to a received signal. For example, the measurement unit 123 can also perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, and the like, based on a received signal. The measurement unit 123 can also measure a received power (e.g., Reference Signal Received Power (RSRP)), a received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), a signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), and the like. The measurement results can also be output to the control unit 110.

[0563] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between apparatuses included in the core network 30 (e.g., network nodes that provide NFs), other base stations 10, and the like, and acquire, transmit, and the like, user data (user plane data), control plane data, and the like, for the user terminals 20.

[0564] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure can also be constituted by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

[0565] In addition, the transmission / reception unit 120 can also transmit a configuration of a Channel State Information-Reference Signal (CSI-RS) using more than 32 ports. The control unit 110 can also control reception of a CSI report based on the configuration. The configuration can also indicate at least one of a combination of a number of horizontal antenna elements and a number of vertical antenna elements, a number of panels, a combination of the number of panels and the number of horizontal antenna elements and the number of vertical antenna elements, a number of horizontal panels and a number of vertical panels, and a combination of the number of horizontal antenna elements and the number of vertical antenna elements.

[0566] (User terminal)

[0567] Figure 27is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. Note that one or more of the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 can be provided.

[0568] Note that in this example, functional blocks that are characteristic of the present embodiment are mainly shown, and it is also conceivable that the user terminal 20 has other functional blocks required for wireless communication. Part of the processing of each unit described below can also be omitted.

[0569] The control unit 210 performs control of the entire user terminal 20. The control unit 210 can be configured by a controller, a control circuit, or the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0570] The control unit 210 can also control generation of a signal, mapping, and the like. The control unit 210 can also control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, a sequence, and the like transmitted as a signal, and forward them to the transmission / reception unit 220.

[0571] The transmission / reception unit 220 can include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 can include a transmission processing unit 2211 and a reception processing unit 2212. The transmission / reception unit 220 can be configured by a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, or the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0572] The transmission / reception unit 220 can be configured as an integrated transmission / reception unit, or can be configured by a transmission unit and a reception unit. The transmission unit can be configured by the transmission processing unit 2211 and the RF unit 222. The reception unit can be configured by the reception processing unit 2212, the RF unit 222, and the measurement unit 223.

[0573] The transmission / reception antenna 230 can be configured by an antenna, such as an array antenna, or the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0574] The transmission / reception unit 220 can receive the downlink channel, the synchronization signal, the downlink reference signal, and the like described above. The transmission / reception unit 220 can transmit the uplink channel, the uplink reference signal, and the like described above.

[0575] The transmission / reception unit 220 can also form at least one of a transmission beam and a reception beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0576] The transmission / reception unit 220 (transmission processing unit 2211) can also perform, for example, processing of a PDCP layer, processing of an RLC layer (e.g., RLC retransmission control), processing of a MAC layer (e.g., HARQ retransmission control), or the like, with respect to data, control information, or the like acquired from the control unit 210, and generate a bit string to be transmitted.

[0577] The transmission / reception unit 220 (transmission processing unit 2211) can also perform, with respect to the bit string to be transmitted, channel coding (may include error correction coding), modulation, mapping, filter processing (filtering), DFT processing (as necessary), IFFT processing, precoding, digital-analog conversion, or the like, as transmission processing, and output a baseband signal.

[0578] In addition, as to whether or not to apply DFT processing, a setting of transform precoding can also be based. With respect to a certain channel (e.g., PUSCH), in a case where transform precoding is effective (enabled), the transmission / reception unit 220 (transmission processing unit 2211) can also perform DFT processing as the above-described transmission processing in order to transmit the channel with a DFT-s-OFDM waveform, and otherwise, the transmission / reception unit 220 (transmission processing unit 2211) can also not perform DFT processing as the above-described transmission processing.

[0579] The transmission / reception unit 220 (RF unit 222) can also perform, with respect to the baseband signal, modulation to a radio frequency band, filter processing (filtering), amplification, or the like, and transmit a signal of the radio frequency band via the transmission / reception antenna 230.

[0580] On the other hand, the transmission / reception unit 220 (RF unit 222) can also perform, with respect to a signal of the radio frequency band received by the transmission / reception antenna 230, amplification, filter processing (filtering), demodulation to a baseband signal, or the like.

[0581] The transmission / reception unit 220 (reception processing unit 2212) can also apply, with respect to the acquired baseband signal, analog-digital conversion, FFT processing, IDFT processing (as necessary), filter processing (filtering), demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, or the like, as reception processing, and acquire user data or the like.

[0582] The transmission / reception unit 220 (measurement unit 223) can also perform a measurement related to a received signal. For example, the measurement unit 223 can also perform RRM measurement, CSI measurement, and the like, based on a received signal. The measurement unit 223 can also measure a received power (for example, RSRP), a reception quality (for example, RSRQ, SINR, SNR), a signal strength (for example, RSSI), propagation path information (for example, CSI), and the like. The measurement result can also be output to the control unit 210.

[0583] In addition, the measurement unit 223 can also derive a channel measurement for CSI calculation based on a channel measurement resource. The channel measurement resource can also be, for example, a Non Zero Power (NZP) CSI-RS resource. Furthermore, the measurement unit 223 can also derive an interference measurement for CSI calculation based on an interference measurement resource. The interference measurement resource can also be at least one of an NZP CSI-RS resource for interference measurement, a CSI-Interference Measurement (IM) resource, and the like. In addition, CSI-IM can also be referred to as CSI-Interference Management (IM), and can also be overwritten with a Zero Power (ZP) CSI-RS. In addition, in the present disclosure, a CSI-RS, an NZP CSI-RS, a ZP CSI-RS, a CSI-IM, a CSI-SSB, and the like can also be overwritten with each other.

[0584] In addition, the transmission unit and the reception unit of the user terminal 20 in the present disclosure can also be constituted by at least one of the transmission / reception unit 220 and the transmission / reception antenna 230.

[0585] The transmission / reception unit 220 can also receive a configuration of a channel state information-reference signal (CSI-RS) using more than 32 ports. The control unit 210 can also measure CSI based on the configuration. The configuration can also indicate at least one of a combination of a number of horizontal antenna elements and a number of vertical antenna elements, a number of panels, a combination of the number of panels and the combination of the number of horizontal antenna elements and the number of vertical antenna elements, a number of horizontal panels and a number of vertical panels, and the combination of the number of horizontal antenna elements and the number of vertical antenna elements.

[0586] The configuration can also indicate either one of a combination of a number of horizontal oversamples and a number of vertical oversamples common to all ranks and a combination of a number of horizontal oversamples and a number of vertical oversamples dependent on a rank.

[0587] The control unit 210 can also support a part of a plurality of codebook types for CSI-RS using ports of 32 or less.

[0588] The setting can also indicate a codebook type based on a codebook for coherent joint transmission.

[0589] (Hardware structure)

[0590] In addition, the block diagrams used in the description of the above-described embodiments show blocks of functional units. These functional blocks (structural units) are realized by any combination of hardware and software of at least one of them. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block can be realized by one device which is physically or logically integrated, or by two or more devices which are physically or logically separated and connected directly or indirectly (for example, by wire, wireless, or the like). The functional block can also be realized by combining the above-described one device or the above-described plurality of devices with software.

[0591] Here, among the functions, there are judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, and the like, but they are not limited to these. For example, a functional block (structural unit) which realizes a transmission function can also be called a transmitting unit, a transmitter, or the like. Any one of them is as described above, and the method of realizing it is not particularly limited.

[0592] For example, the base station, the user terminal, and the like in one embodiment of the present disclosure can also function as a computer which performs the processing of the wireless communication method of the present disclosure. Figure 28 is a diagram showing an example of a hardware structure of a base station and a user terminal according to one embodiment. The above-described base station 10 and user terminal 20 can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0593] Also in the present disclosure, the terms of apparatus, circuit, device, section, unit, and the like can be replaced with each other. The hardware structure of the base station 10 and the user terminal 20 can be configured to include one or more of each of the apparatuses shown in the drawings, or can be configured not to include a part of the apparatuses.

[0594] For example, the processor 1001 is illustrated only one, but there can be a plurality of processors. Also, the processing can be executed by one processor, or can be executed by two or more processors simultaneously, sequentially, or with other methods. Also, the processor 1001 can be realized by one or more chips.

[0595] Each function in the base station 10 and the user terminal 20 is realized, for example, by at least one of the processor 1001 performing an operation and controlling communication via the communication apparatus 1004, or controlling reading and writing of data in the memory 1002 and the storage 1003, by reading a specific software (program) into the hardware such as the processor 1001 and the memory 1002.

[0596] The processor 1001 causes, for example, an operating system to operate to control the entire computer. The processor 1001 can also be constituted by a central processing device (Central Processing Unit (CPU)) including an interface with a peripheral device, a control apparatus, an arithmetic apparatus, a register, and the like. For example, at least a part of the above-described control unit 110 (210), the transmission and reception unit 120 (220), and the like can also be realized by the processor 1001.

[0597] Further, the processor 1001 reads a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication apparatus 1004 to the memory 1002, and performs various processing according to them. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments can be used. For example, the control unit 110 (210) can also be realized by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be applied to other functional blocks.

[0598] The memory 1002 can also be a computer-readable recording medium such as at least one of a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), other appropriate types of storage media. The memory 1002 can also be referred to as a register, a cache, a main memory, and the like. The memory 1002 can store programs (program codes), software modules, and the like, which are executable to implement the wireless communication method according to an embodiment of the present disclosure.

[0599] The storage 1003 can also be a computer-readable recording medium such as at least one of a flexible disc, a Floppy (registered trademark) disc, a magneto-optical disc (e.g., a Compact Disc (Compact Disc ROM (CD-ROM), and the like), a Digital Versatile Disc, a Blu-ray (registered trademark) disc), a removable disc, a hard disk drive, an intelligent card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, other appropriate types of storage media. The storage 1003 can also be referred to as an auxiliary storage device.

[0600] The communication device 1004 is hardware (a transmission-reception device) for performing communication between computers via at least one of a wired network and a wireless network, such as a network device, a network controller, a network card, a communication module, and the like. The communication device 1004 can also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, in order to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-described transmission-reception unit 120 (220), the transmission-reception antenna 130 (230), and the like can also be implemented by the communication device 1004. The transmission-reception unit 120 (220) can also be implemented in a physically or logically separate manner by a transmission unit 120a (220a) and a reception unit 120b (220b).

[0601] The input device 1005 is an input device that receives input from the outside (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, or the like). The output device 1006 is an output device that implements output to the outside (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, or the like). In addition, the input device 1005 and the output device 1006 can also be a structure that is integrated (for example, a touch panel).

[0602] Further, the processor 1001, the memory 1002, and the like are connected through a bus 1007 for communicating information. The bus 1007 can be configured with a single bus, or can be configured with different buses between the devices.

[0603] Further, the base station 10 and the user terminal 20 can also be configured to include a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), or the like hardware, and a part or all of each functional block can also be implemented using the hardware. For example, the processor 1001 can also be implemented using at least one of these hardware.

[0604] (Modified example)

[0605] In addition, the terms described in the present disclosure and the terms necessary for understanding the present disclosure can also be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (a signal or signaling) can also be rewritten to each other. Further, the signal can also be a message. The reference signal (RS) can also be abbreviated as RS, and can also be referred to as a pilot, a pilot signal, or the like depending on the applied standard. Further, the Component Carrier (CC) can also be referred to as a cell, a frequency carrier, a carrier frequency, or the like.

[0606] A radio frame can also be configured with one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) that configure the radio frame can also be referred to as a subframe. Further, the subframe can also be configured with one or more slots in the time domain. The subframe can also be a fixed time length (for example, 1 ms) that is independent of numerology.

[0607] Here, the numerology can also be a communication parameter applied in at least one of transmission and reception of a certain signal or channel. For example, the numerology can also represent at least one of a subcarrier spacing (SubCarrier Spacing (SCS)), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (Transmission Time Interval (TTI)), a number of symbols per TTI, a radio frame structure, a specific filtering processing performed by a transmitter-receiver in a frequency domain, a specific windowing processing performed by the transmitter-receiver in a time domain, and the like.

[0608] A 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, and the like) in a time domain. Also, a slot can also be a time unit based on numerology.

[0609] A slot can also contain a plurality of mini-slots. Each mini-slot can also be composed of one or more symbols in a time domain. Also, a mini-slot can also be referred to as a sub-slot. A mini-slot can also be composed of a smaller number of symbols than a slot. A PDSCH (or PUSCH) transmitted in a larger time unit than a mini-slot can also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot can also be referred to as PDSCH (PUSCH) mapping type B.

[0610] A radio frame, a subframe, a slot, a mini-slot, and a symbol all represent a time unit for transmitting a signal. A radio frame, a subframe, a slot, a mini-slot, and a symbol can also use other designations corresponding to each. Also, the time units of frame, subframe, slot, mini-slot, symbol, and the like in the disclosure can also be replaced with each other.

[0611] For example, one subframe can also be referred to as a TTI, a plurality of consecutive subframes can also be referred to as a TTI, one slot or one mini-slot can also be referred to as a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in the existing LTE, can be a period shorter than 1 ms (for example, 1-13 symbols), or can be a period longer than 1 ms. Also, a unit representing a TTI can not be referred to as a subframe, but can be referred to as a slot, a mini-slot, or the like.

[0612] Here, the TTI refers to, for example, a minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling of allocating radio resources (frequency bandwidth, transmission power, and the like that can be used in each user terminal) to each user terminal in TTI units. Note that the definition of the TTI is not limited to this.

[0613] The TTI can also be a transmission time unit of a data packet (transport block), a code block, a code word, or the like that has been subjected to channel coding, and can also become a processing unit of scheduling, link adaptation, or the like. Note that when the TTI is given, the time interval (for example, the number of symbols) to which a transport block, a code block, a code word, or the like is actually mapped can also be shorter than the TTI.

[0614] Note that in a case where one slot or one mini-slot is referred to as the TTI, one or more TTIs (that is, one or more slots or one or more mini-slots) can also become a minimum time unit of scheduling. Furthermore, the number of slots (the number of mini-slots) that constitute the minimum time unit of scheduling can also be controlled.

[0615] A TTI having a time length 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 slot, or the like. A TTI shorter than the normal TTI can also be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, or the like.

[0616] Note that the long TTI (for example, the normal TTI, the subframe, or the like) can also be rewritten as a TTI having a time length exceeding 1 ms, and the short TTI (for example, the shortened TTI, or the like) can also be rewritten as a TTI having a TTI length shorter than the long TTI and a TTI length of 1 ms or more.

[0617] A resource block (Resource Block (RB)) is a resource allocation unit in the time domain and the frequency domain, and can also include one or more continuous subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in the RB can also be the same regardless of the numerology, and can also be 12, for example. The number of subcarriers included in the RB can also be determined based on the numerology.

[0618] Furthermore, the RB can also include one or more symbols in the time domain, and can also be the length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, or the like can also be constituted by one or more resource blocks, respectively.

[0619] In addition, one or a plurality of RBs can also be referred to as a Physical RB (PRB), a Sub-Carrier Group (SCG), a Resource Element Group (REG), a PRB pair, a RB pair, or the like.

[0620] In addition, a resource block can also be composed of one or a plurality of Resource Elements (REs). For example, one RE can also be a wireless resource area of one subcarrier and one symbol.

[0621] A Bandwidth Part (BWP) (may also be referred to as a partial bandwidth, etc.) can also indicate a subset of contiguous common RBs (common resource blocks) for a certain numerology in a certain carrier. Here, the common RBs can be determined by the index of the RBs with reference to a common reference point of the carrier. A PRB can also be defined in a certain BWP and additionally numbered within the BWP.

[0622] A UL BWP (BWP for UL) and a DL BWP (BWP for DL) can also be included in a BWP. For a UE, one or a plurality of BWPs can also be configured within one carrier.

[0623] At least one of the configured BWPs can also be activated, and the UE can not be assumed to transmit and receive a specific signal / channel outside the activated BWP. In addition, "cell", "carrier", and the like in the present disclosure can also be rewritten as "BWP".

[0624] In addition, the above-described structures of radio frames, subframes, slots, mini-slots, and symbols, and the like are merely examples. For example, the number of subframes included in a radio frame, the number of slots of each subframe or radio frame, the number of mini-slots included in a slot, the number of symbols included in a slot or a mini-slot, the number of RBs, the number of subcarriers included in an RB, and the number of symbols, symbol length, Cyclic Prefix (CP) length, and the like within a TTI can be variously changed.

[0625] In addition, the information, parameters, and the like described in the present disclosure can be expressed by an absolute value, a relative value with respect to a specific value, or can also be expressed by corresponding other information. For example, a wireless resource can also be indicated by a specific index.

[0626] In the present disclosure, names used for parameters and the like are not names in all respects that are limiting. Furthermore, mathematical expressions and the like using these parameters can also be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, and the like) and information elements can be identified by any appropriate names, and thus various names assigned to these various channels and information elements are not names in all respects that are limiting.

[0627] Information, signals, and the like described in the present disclosure can also be represented by any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips that can be referenced throughout the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0628] Furthermore, information, signals, and the like can be outputted in at least one direction, from a higher layer to a lower layer, and from a lower layer to a higher layer. Information, signals, and the like can also be inputted / outputted via a plurality of network nodes.

[0629] Information, signals, and the like inputted / outputted can be stored in a specific location (for example, a memory) and can be managed using a management table. Information, signals, and the like inputted / outputted can be overwritten, updated, or appended. Information, signals, and the like outputted can be deleted. Information, signals, and the like inputted can be transmitted to other devices.

[0630] Notification of information in the present disclosure is not limited to the manners / embodiments described in the present disclosure, and can be performed using other methods. For example, notification of information in the present disclosure can also be implemented through physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (for example, Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), and the like), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0631] In addition, the physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like. Furthermore, the RRC signaling can also be referred to as an RRC message, and can also be, for example, an RRC connection setup message, an RRC connection reconfiguration message, and the like. Furthermore, the MAC signaling can also be notified using, for example, a MAC control element (CE).

[0632] Furthermore, the notification of the specific information (for example, the notification of "X") is not limited to explicit notification, and can also be performed implicitly (for example, by not performing the notification of the specific information, or by the notification of other information).

[0633] The determination can be performed by a value represented by one bit (0 or 1), can also be performed by a true / false value (boolean) represented by true or false, and can also be performed by a comparison of numerical values (for example, a comparison with a specific value).

[0634] Software, regardless of being referred to as software, firmware, middle-ware, microcode, hardware description language, or by other names, should be interpreted broadly to mean instructions, instruction sets, code (code), code segments, program code (program code), programs (programs), sub-programs (sub-programs), software modules (software modules), applications (applications), software applications (software applications), software packages (software packages), routines (routines), sub-routines (sub-routines), objects (objects), executable files, execution threads, procedures, functions, and the like.

[0635] Moreover, software, instructions, information, etc. can also be sent using a transmission medium or signaling medium via a wired technology (coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL), etc.), and / or wireless technology (infrared, microwave, etc.), etc. In this manner, software, instructions, etc. can be transmitted from a website, server, etc. to a requesting entity (e.g., a module implementing the functionality described in this disclosure).

[0636] The terms “system” and “network” used in this disclosure can be used interchangeably. The “network” can also mean a device (e.g., a base station) included in the network.

[0637] 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,” “transmission power,” “phase rotation,” “antenna port,” “layer,” “number of layers,” “rank,” “resource,” “resource set,” “beam,” “beam width,” “beam angle,” “antenna,” “antenna element,” “panel,” “UE panel,” “transmitting entity,” “receiving entity,” etc. can be used interchangeably.

[0638] In addition, in this disclosure, an antenna port can also be mutually rewritten with an antenna port for an arbitrary signal / channel (e.g., a DeModulation Reference Signal (DMRS) port). In this disclosure, a resource can also be mutually rewritten with a resource for an arbitrary signal / channel (e.g., a reference signal resource, an SRS resource, etc.). In addition, a resource can also include a time / frequency / code / space / power resource. Furthermore, a spatial domain transmission filter can also include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0639] The above group, for example, can also include at least one of a spatial relation group, a code division multiplexing (Code Division Multiplexing (CDM)) group, a reference signal (Reference Signal (RS)) group, a control resource set (COntrol REsource SET (CORESET)) group, a PUCCH group, an antenna port group (for example, a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, and the like.

[0640] Further, in the present disclosure, a beam, an SRS resource indicator (SRS Resource Indicator (SRI)), a CORESET, a CORESET pool, a PDSCH, a PUSCH, a codeword (Codeword (CW)), a transport block (Transport Block (TB)), an RS, and the like can also be rewritten to each other.

[0641] Further, in the present disclosure, a TCI state, a downlink TCI state (DL TCI state), an uplink TCI state (UL TCI state), a unified TCI state, a common TCI state, a joint TCI state, and the like can also be rewritten to each other.

[0642] Further, in the present disclosure, “QCL”, “QCL assumption”, “QCL relationship”, “QCL type information”, “QCL property / properties”, “property / properties of a specific QCL type (for example, Type A, Type D)”, “a specific QCL type (for example, Type A, Type D)”, and the like can also be rewritten to each other.

[0643] In the present disclosure, an index, an identifier (Identifier (ID)), an indicator, an indication, a resource ID, and the like can also be rewritten to each other. In the present disclosure, a sequence, a list, a set, a group, a cluster, a cluster, a subset, and the like can also be rewritten to each other.

[0644] Further, a spatial relation information identifier (Identifier (ID)) (TCI state ID) and spatial relation information (TCI state) can also be rewritten to each other. The “spatial relation information (TCI state)” can also be rewritten to “a set of spatial relation information (TCI state)”, “one or a plurality of spatial relation information”, and the like. A TCI state and a TCI can also be rewritten to each other. Spatial relation information and a spatial relation can also be rewritten to each other.

[0645] In the present 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", "component carrier", and the like can be used interchangeably. There are also cases where the base station is called with the terms "macro cell", "small cell", "femto cell", "pico cell", and the like.

[0646] A base station can accommodate one or plural (for example, three) cells. In a case where a base station accommodates plural cells, the coverage area of the base station as a whole can be divided into plural smaller areas, and each of the smaller areas can also be provided with a communication service by a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides a communication service in the coverage.

[0647] In the present disclosure, the case where a base station transmits information to a terminal can also be overwritten with the case where the base station instructs the terminal to perform control / operation based on the information.

[0648] In the present disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", and the like can be used interchangeably.

[0649] There are also cases where the mobile station is called with the terms "subscriber station", "mobile unit", "subscriber unit", "wireless unit", "remote unit", "mobile device", "wireless device", "wireless communication device", "remote device", "mobile subscriber station", "access terminal", "mobile terminal", "wireless terminal", "remote terminal", "hand set", "user agent", "mobile client", "client", or a number of other appropriate terms.

[0650] At least one of the base station and the mobile station can also be called a transmission device, a reception device, a wireless communication device, and the like. In addition, at least one of the base station and the mobile station can also be a device mounted on a moving object, a moving object body, and the like.

[0651] The mobile body refers to an object that can move, and the moving speed is arbitrary, and of course, the case where the mobile body stops is also included. The mobile body includes, for example, a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a Connected Car, a loading shovel, a bulldozer, a wheel loader, a dump truck, a fork lift, a train, a bus, a trolley, a rickshaw, a ship and other watercraft, an airplane, a rocket, an artificial satellite, a drone, a multicopter, a quadcopter, a hot air balloon, and an object mounted thereon, and is not limited to these. In addition, the mobile body can also be a mobile body that autonomously travels based on a travel instruction.

[0652] The mobile body can be a vehicle (for example, a vehicle, an airplane, or the like), a mobile body that moves in a unmanned manner (for example, a drone, a self-driving vehicle, or the like), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move at the time of communication operation. 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.

[0653] Figure 29 FIG. 1 is a diagram that shows an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0654] The drive unit 41 is constituted by at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 is constituted to include at least a steering wheel (also referred to as a handle), and at least one of the front wheels 46 and the rear wheels 47 is steered based on an operation of the steering wheel operated by a user.

[0655] The electronic control unit 49 is constituted by a microprocessor 61, a memory (ROM, RAM) 62, a communication port (for example, an Input / Output (I / O) port) 63. Signals from various sensors 50-58 provided 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).

[0656] As the signals from the various sensors 50-58, there are a current signal from a current sensor 50 that senses a current of the motor, a rotational speed signal of the front wheel 46 / rear wheel 47 acquired by a rotational speed sensor 51, an air pressure signal of the front wheel 46 / rear wheel 47 acquired by an air pressure sensor 52, a vehicle speed signal acquired by a vehicle speed sensor 53, an acceleration signal acquired by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 acquired by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 acquired by a brake pedal sensor 56, an operation signal of the shift lever 45 acquired by a shift lever sensor 57, a detection signal for detecting an obstacle, a vehicle, a pedestrian, and the like acquired by an object detection sensor 58, and the like.

[0657] The information service unit 59 is constituted by various devices for providing (outputting) various information such as driving information, traffic information, entertainment information, and the like, and one or more ECUs that control these devices, such as a navigation system, an audio system, a speaker, a display, a television, a radio, and the like. The information service unit 59 provides various information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40 using information acquired from external devices via the communication module 60 and the like.

[0658] The information service unit 59 can include an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, and the like) that receives input from the outside, and can include an output device (for example, a display, a speaker, an LED lamp, a touch panel, and the like) that performs output to the outside.

[0659] The drive assist system unit 64 is constituted by a millimeter wave radar, a Light Detection and Ranging (LiDAR), a camera, a positioner (for example, a Global Navigation Satellite System (GNSS) or the like), map information (for example, a High Definition (HD) map, an Autonomous Vehicle (AV) map, or the like), a gyro system (for example, an Inertial Measurement Device (Inertial Measurement Unit (IMU)), an Inertial Navigation Device (Inertial Navigation System (INS)), or the like), an Artificial Intelligence (AI) chip, an AI processor, such as various devices that provide a function for preventing an accident or reducing a driving burden of a driver, and one or more ECUs that control these devices. Furthermore, the drive assist system unit 64 transmits and receives various information via the communication module 60, and realizes a drive assist function or an autonomous driving function.

[0660] The communication module 60 is capable of communicating with the microprocessor 61 and the structural elements of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) between the microprocessor 61 and the memory (ROM, RAM) 62, and various sensors 50-58 in the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, and the electronic control unit 49 provided in the vehicle 40 via the communication port 63.

[0661] The communication module 60 is capable of being controlled by the microprocessor 61 of the electronic control unit 49, and is a communication device capable of communicating with an external device. For example, various information is transmitted and received between the communication module 60 and the external device via wireless communication. The communication module 60 can be inside and outside the electronic control unit 49. The external device can also be the base station 10, the user terminal 20, or the like described above. Furthermore, the communication module 60 can also be at least one of the base station 10 and the user terminal 20 described above (and can function as at least one of the base station 10 and the user terminal 20).

[0662] The communication module 60 can also transmit at least one of the signals from the various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to the external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, and the like can also be referred to as input units that receive input. For example, the PUSCH transmitted by the communication module 60 can also include information based on the above input.

[0663] The communication module 60 receives various kinds of information (traffic information, traffic light information, inter-vehicle information, and the like) transmitted from the external device and displays it to the information service unit 59 provided in the vehicle. The information service unit 59 can also be referred to as an output unit that outputs information (for example, information output to a display, a speaker, and the like based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 60).

[0664] Further, the communication module 60 stores various kinds of information received from the external device in the memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 can also perform control of the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axles 48, the various sensors 50-58, and the like provided in the vehicle 40.

[0665] Further, the base station in the present disclosure can also be rewritten as a user terminal. For example, the structures in which the communication between the base station and the user terminal is replaced with communication between a plurality of user terminals (for example, also referred to as Device-to-Device (D2D), Vehicle-to-Everything (V2X), and the like) can also apply the various modes / embodiments of the present disclosure. In this case, it can also be configured to have the functions of the base station 10 described above by the user terminal 20. Further, the terms of "uplink", "downlink", and the like can also be rewritten as terms corresponding to inter-terminal communication (for example, "sidelink"). For example, the uplink channel, the downlink channel, and the like can also be rewritten as a sidelink channel.

[0666] Likewise, the user terminal in the present disclosure can also be rewritten as a base station. In this case, it can also be configured to have the functions of the user terminal 20 described above by the base station 10.

[0667] In the present disclosure, actions by a base station are sometimes also performed by its upper node depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, consider a Mobility Management Entity (MME), a Serving-Gateway (S-GW), and the like, but not limited to these), or a combination thereof.

[0668] The modes / embodiments explained in the present disclosure can be used alone or in combination, and can also be used in switching as execution proceeds. Furthermore, the processing procedure, timing, flowchart, and the like of the modes / embodiments explained in the present disclosure can also be changed in order as long as there is no contradiction. For example, regarding the method explained in the present disclosure, the elements of various steps are prompted using the order of the examples, but are not limited to the specific order prompted.

[0669] The modes / embodiments explained in the present disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is an integer, a fraction)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, next-generation systems extended, modified, created, or specified based on them, and the like. Furthermore, a plurality of systems can also be combined (for example, LTE or LTE-A, in combination with 5G, and the like) and applied.

[0670] The description "based on" used in the present disclosure does not mean "only based on" unless specifically written. In other words, the description "based on" means both "only based on" and "at least based on".

[0671] Any reference to an element or element in the disclosure using a designation of "first," "second," and so on does not limit the quantity or order of those elements. Rather, these designations are used as a convenient method of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements can be employed or that the first element must precede the second element.

[0672] The term "determining" as used in the disclosure can encompass a wide variety of actions. For example, "determining" can include calculating, computing, processing, deriving, investigating, looking up (such as looking up in a table, a database or another data structure), ascertaining and the like. Also, "determining" can include receiving (such as receiving information), accessing (such as accessing data in a memory), and the like.

[0673] Also, "determining" can include resolving, selecting, choosing, establishing and the like.

[0674] Also, "determining" can include resolving, selecting, choosing, establishing and the like.

[0675] Also, "determining" can be interchanged with "assuming," "expecting," "considering" and the like in the disclosure. Also, "not assuming" can be interchanged with "assuming not" in the disclosure.

[0676] In the present disclosure, "expect" can also be rewritten as "be expected" and vice versa. For example, "expect (s)..." (the "..." can be expressed as a that clause, a to infinitive, etc.) can be rewritten as "be expected..." and vice versa. Also, "does not expect..." can be rewritten as "be not expected..." and vice versa. Furthermore, "An apparatus A is not expected..." can be rewritten as "An apparatus B other than the apparatus A does not expect..." with respect to the apparatus A (for example, in a case where the apparatus A is a UE, the apparatus B can also be a base station).

[0677] The "maximum transmit power" described in the present disclosure can mean a maximum value of a transmit power, a nominal UE maximum transmit power, or a rated UE maximum transmit power.

[0678] The term "connected" or "coupled" or all variations thereof used in the present disclosure, or all variations thereof, mean all of the connections or couplings between two or more elements, whether direct or indirect, and can include the existence of one or more intermediate elements between the two elements "connected" or "coupled" to each other. The coupling or connection between the elements can be physical or logical, or a combination thereof. For example, "connected" can be replaced with "accessed".

[0679] In the present disclosure, in a case where two elements are connected, it can be considered that they are "connected" or "coupled" to each other using one or more wires, cables, printed electronics, etc., and as several non-limiting and non-inclusive examples, electromagnetic energy having a wavelength in the radio frequency region, the microwave region, the light (both visible and invisible) region, etc., is used so as to be "connected" or "coupled" to each other.

[0680] In the present disclosure, the term "A is different from B" can also mean "A and B are different from each other". In addition, the term can also mean "A and B are different from C, respectively". The terms "separated", "coupled", etc. can also be interpreted in the same manner as "different".

[0681] In the present disclosure, in the case where "include", "including", and variations thereof are used, these terms are intended to mean the same as the term "comprising". Furthermore, in the present disclosure, the term "or" is not intended to mean the exclusive or.

[0682] In the present disclosure, in the case where a definite article is added by translation, for example, a, an, and the in English, the present disclosure can also include the case where the noun following these definite articles is plural.

[0683] In the present disclosure, "below", "less than", "above", "more than", "equal to", and the like can also be rewritten with each other. Furthermore, in the present disclosure, terms meaning "good", "bad", "large", "small", "high", "low", "early", "late", "wide", "narrow", and the like are not limited to the original, comparative, and superlative, and can also be rewritten with each other. Furthermore, in the present disclosure, as a description of a term meaning "good", "bad", "large", "small", "high", "low", "early", "late", "wide", "narrow", and the like, a description with "i-th" (i is an arbitrary integer) is not limited to the original, comparative, and superlative, and can also be rewritten with each other (for example, "highest" and "i-th highest" can also be rewritten with each other).

[0684] In the present disclosure, "of", "for", "regarding", "related to", "associated with", and the like can also be rewritten with each other.

[0685] In the present disclosure, "A when (if), B" "if A, B" "B upon A" "B in response to A" "B based on A" "B during / while A" "B before A" "B at (the same time as) / on A" "B after A" "B since A" "B until A" and the like can be rewritten each other. In addition, A, B and the like here can be rewritten as a noun, a verb, an article and the like according to the context. In addition, the time difference between A and B can be almost 0 (immediately after or immediately before). Furthermore, a time offset can be applied in the time at which A occurs. For example, "A" can be rewritten with "A occurs with a time offset before / after" each other. The time offset (for example, 1 or more symbols / slots) can be predetermined or determined by the UE based on the information notified.

[0686] In the present disclosure, timing, time, time instance, arbitrary time unit (for example, slot, sub-slot, symbol, subframe), period, occasion, resource and the like can be rewritten each other.

[0687] The above has been described in detail for the invention to which the present disclosure relates, but the invention to which the present disclosure relates is obviously not limited to the embodiments described in the present disclosure. The description of the present disclosure is for the purpose of illustration and does not impose any limiting meaning on the invention to which the present disclosure relates.

Claims

1. A terminal, comprising: The receiving unit receives the channel state information reference signal (CSI-RS) settings using more than 32 ports; and The control unit, based on the aforementioned settings, measures the CSI. The setting represents at least one of the following: a combination of the number of horizontal antenna elements and the number of vertical antenna elements, the number of panels, the number of panels and the combination of the number of horizontal antenna elements and the number of vertical antenna elements, the number of horizontal panels and the number of vertical panels, and the combination of the number of horizontal antenna elements and the number of vertical antenna elements.

2. The terminal as described in claim 1, wherein, The setting represents either of the following: a combination of horizontal and vertical oversampled numbers that are common to all ranks, or a combination of horizontal and vertical oversampled numbers that depend on the rank.

3. The terminal as described in claim 1, wherein, The control unit supports a subset of multiple codebook types for CSI-RS using ports below 32.

4. The terminal as described in claim 1, wherein, The setting indicates the codebook type based on the codebook used for coherent joint transmission.

5. A wireless communication method for a terminal, comprising: The steps for setting up the Channel State Information Reference Signal (CSI-RS) using more than 32 ports; and Based on the aforementioned settings, the steps for measuring CSI are as follows: The setting represents at least one of the following: a combination of the number of horizontal antenna elements and the number of vertical antenna elements, the number of panels, the number of panels and the combination of the number of horizontal antenna elements and the number of vertical antenna elements, the number of horizontal panels and the number of vertical panels, and the combination of the number of horizontal antenna elements and the number of vertical antenna elements.

6. A base station, comprising: The transmitting unit transmits the channel state information reference signal (CSI-RS) settings using more than 32 ports; and The control unit, based on the aforementioned settings, controls the reception of CSI reports. The setting represents at least one of the following: a combination of the number of horizontal antenna elements and the number of vertical antenna elements, the number of panels, the number of panels and the combination of the number of horizontal antenna elements and the number of vertical antenna elements, the number of horizontal panels and the number of vertical panels, and the combination of the number of horizontal antenna elements and the number of vertical antenna elements.

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