Terminal, wireless communication method, and base station

Abstract

A terminal according to one aspect of the present disclosure includes: a receiving unit that receives settings for channel status information (CSI) reports using an extended codebook for more than 32 ports based on a type 1 single-panel codebook, and a control unit that controls transmission of index reports in the extended codebook. The index is based on a portion of first information relating the index, a two-dimensional antenna configuration, and an oversampling factor to the type 1 single-panel codebook, or based on second information relating the index and the oversampling factor to the extended codebook.

Description

Terminal, wireless communication method, and base station

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

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

[0003] Successor systems to LTE (for example, 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later) are also being considered.

[0004] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010

[0005] In future wireless communication systems (e.g., NR), it is being considered that user equipment (UE) will control transmission and reception processes based on information regarding quasi-co-location (QCL, Transmission Configuration Indication (TCI) status, beam).

[0006] However, a codebook for CSI using multiple channel state information-reference signal (CSI-RS) ports to manage multiple beams is being considered. However, the measurement and reporting methods for this codebook have not been sufficiently considered. Insufficient consideration of such measurement and reporting could lead to a decrease in communication quality and throughput.

[0007] Therefore, one of the objectives of this disclosure is to provide a terminal, a wireless communication method, and a base station for appropriately measuring and reporting CSI.

[0008] A terminal according to one aspect of the present disclosure includes a receiving unit that receives settings for channel status information (CSI) reporting using an extended codebook for more than 32 ports based on a Type 1 single-panel codebook, and a control unit that controls the transmission of index reporting in the extended codebook, wherein the index is based on a portion of first information relating the index, a two-dimensional antenna setting, and an oversampling factor to the Type 1 single-panel codebook, or on second information relating the index and the oversampling factor to the extended codebook.

[0009] According to one aspect of this disclosure, CSI can be appropriately measured and reported.

[0010] Figure 1 shows i in the two-layer CSI report. 1,3 An example of mapping from to k1 and k2 is shown. Figure 2 shows i in the CSI report for 3-layer and 4-layer. 1,3Figure 3 shows an example of mapping from k1 to k2. Figure 4 shows an example of mapping method 2 for CSI-RS resources and port indexes. Figure 5 shows an example of selecting the first SD basis. Figure 6 shows an example of selecting another SD basis in the case of RI ≤ 4. Figure 7 shows an example of selecting another SD basis in the case of RI > 4 and a 1-bit value of "0". Figure 8 shows an example of selecting another SD basis in the case of RI > 4 and a 1-bit value of "1". Figure 9 shows an example of two cases in table T1-3 relating to options 1-1 and 1-2 of Embodiment 1. Figure 10 shows an example of mapping A in table T1-4 relating to option 2-1 of Embodiment 1. Figure 11 shows an example of mapping B relating to option 2-2 of Embodiment 1. Figure 12 is a diagram showing an example of the schematic configuration of a wireless communication system according to one embodiment. Figure 13 is a diagram showing an example of the configuration of a base station according to one embodiment. Figure 14 shows an example of the configuration of a user terminal according to one embodiment. Figure 15 shows an example of the hardware configuration of a base station and user terminal according to one embodiment. Figure 16 shows an example of a vehicle according to one embodiment.

[0011] (CSI Reporting) Rel. 15 In NR, a terminal (also called a user terminal, User Equipment (UE), etc.) generates (also called determining, calculating, estimating, measuring, etc.) Channel State Information (CSI) based on a Reference Signal (RS) (or a resource for said RS), and transmits (also called reporting, feedback, etc.) the generated CSI to the network (e.g., a base station). The CSI may be transmitted to the base station using, for example, an uplink control channel (e.g., a Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (e.g., a Physical Uplink Shared Channel (PUSCH)).

[0012] The RS used to generate the CSI may be at least one of the following: Channel State Information Reference Signal (CSI-RS), Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, Synchronization Signal (SS), or Demodulation Reference Signal (DMRS).

[0013] The CSI-RS may include at least one of Non Zero Power (NZP) CSI-RS and CSI-Interference Management (CSI-Interference Measurement, CSI-IM). The SS / PBCH block is a block that includes SS and PBCH (and corresponding DMRS), and may be called an SS block (SSB), etc. The SS may also include at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).

[0014] Furthermore, CSI may include at least one of the following: Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SS / PBCH Block Resource Indicator (SSBRI, SSB Index), Layer Indicator (LI), Rank Indicator (RI), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), L1-SNR (Signal to Noise Ratio).

[0015] The UE may receive information regarding CSI reporting (report configuration information) and control CSI reporting based on that report configuration information. This report configuration information may be, for example, the "CSI-ReportConfig" information element (IE) of Radio Resource Control (RRC).

[0016] The reporting configuration information (for example, "CSI-ReportConfig" in RRC IE) may include, for example, at least one of the following: ◆ Information about the type of CSI report (report type information, for example, "reportConfigType" in RRC IE) ◆ Information about one or more quantities (one or more CSI parameters) of CSI to be reported (report quantity information, for example, "reportQuantity" in RRC IE) ◆ Information about the RS resources used to generate the quantity (the CSI parameter) (resource information, for example, "CSI-ResourceConfigId" in RRC IE) ◆ Information about the frequency domain to which the CSI report is applied (frequency domain information, for example, "reportFreqConfiguration" in RRC IE)

[0017] For example, the reporting type information may indicate a periodic CSI (P-CSI) report, an aperiodic CSI (A-CSI) report, or a semi-persistent CSI (SP-CSI) report.

[0018] Furthermore, the reported quantity information may specify at least one combination of the above-mentioned CSI parameters (e.g., CRI, RI, PMI, CQI, LI, L1-RSRP, etc.).

[0019] Furthermore, the resource information may also be the ID of the RS resource. The RS resource may include, for example, a non-zero power CSI-RS resource or SSB and a CSI-IM resource (for example, a zero-power CSI-RS resource).

[0020] Furthermore, frequency domain information may indicate the frequency granularity of the CSI report. This frequency granularity may include, for example, wideband and subband. The wideband is the entire CSI reporting band. The wideband may be, for example, the entire carrier (component carrier (CC), cell, serving cell) or the entire bandwidth part (BWP) within a carrier. The wideband may also be referred to as the CSI reporting band, the entire CSI reporting band, etc.

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

[0022] Frequency domain information may indicate whether to report wideband or subband PMI (frequency domain information may include, for example, the RRC IE's "pmi-FormatIndicator" used to determine whether to report wideband PMI or subband PMI). Based on at least one of the above-mentioned reporting quantity information and frequency domain information, the UE may determine the frequency granularity of the CSI report (i.e., whether to report wideband PMI or subband PMI).

[0023] If wideband PMI reporting is established (decided), one wideband PMI may be reported for the entire CSI reporting band. On the other hand, if subband PMI reporting is established, a single wideband indication i1 may be reported for the entire CSI reporting band, and one subband indication i2 (e.g., subband indication for each subband) may be reported for one or more subbands within the entire CSI reporting band.

[0024] The UE performs channel estimation using the received RS and estimates the channel matrix H. The UE then feeds back the index (PMI) determined based on the estimated channel matrix.

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

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

[0027] The above codebooks may include a codebook for Type 1 CSI (also referred to as a Type 1 codebook, etc.) and a codebook for Type 2 CSI (also referred to as a Type 2 codebook, etc.). Furthermore, Type 1 CSI may include Type 1 single-panel CSI and Type 1 multi-panel CSI, and different codebooks (Type 1 single-panel codebook and Type 1 multi-panel codebook) may be specified for each.

[0028] The Upbound Control Information (UCI) type may include at least one of Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), scheduling request (SR), or CSI. The UCI may be carried by PUCCH or by PUSCH.

[0029] In Rel. 15 NR, the UCI may include one CSI part for wideband PMI feedback. CSI report #n includes PMI wideband information, if reported.

[0030] In Rel. 15 NR, the UCI may include two CSI parts for subband PMI feedback. CSI part 1 contains wideband PMI information. CSI part 2 contains one wideband PMI piece and several subband PMI pieces. CSI parts 1 and 2 are encoded separately.

[0031] In Rel. 15 NR, the UE is configured by a higher layer with N (N≧1) CSI reporting settings and M (M≧1) CSI resource settings. For example, a CSI reporting setting (CSI-ReportConfig) includes a resource setting for channel measurement (resourcesForChannelMeasurement), a CSI-IM resource setting for interference (csi-IM-ResourceForInterference), an NZP-CSI-RS resource setting for interference (nzp-CSI-RS-ResourceForInterference), and a report quantity (reportQuantity). Each of the resource settings for channel measurement, the CSI-IM resource setting for interference, and the NZP-CSI-RS setting for interference is associated with a CSI resource setting (CSI-ResourceConfig, CSI-ResourceConfigId). The CSI resource configuration includes a list of CSI-RS resource sets (csi-RS-ResourceSetList, e.g., NZP-CSI-RS resource set or CSI-IM resource set).

[0032] To enable more dynamic channel / interference hypotheses for NCJT, targeting both FR1 and FR2, evaluation and specification of CSI reporting for at least one multi-TRP and multi-panel transmission of DL are being considered.

[0033] In this disclosure, Type 1 and Type I may be interpreted as interchangeable. In this disclosure, Type 2 and Type II may be interpreted as interchangeable.

[0034] In this disclosure, CSI-RS, periodic CSI-RS (P-CSI-RS), semi-persistent CSI-RS (SP-CSI-RS), and aperiodic CSI-RS (AP-CSI-RS, A-CSI-RS) may be interpreted interchangeably. In this disclosure, CSI-RS, periodic CSI reporting (P-CSI reporting), semi-persistent CSI reporting (SP-CSI reporting), and aperiodic CSI reporting (AP-CSI reporting, A-CSI reporting) may be interpreted interchangeably.

[0035] (CSI-RS port) In Rel. 15, CSI-RS is used as a DL RS for at least one of channel state information (CSI) acquisition, beam management (BM), beam failure recovery (BFR), and fine tracking of time and frequency. CSI-RS supports 1, 2, 4, 8, 12, 16, 24, and 32 ports (antenna ports, CSI-RS ports). CSI-RS supports periodic, semi-persistent, and aperiodic transmissions. The frequency density of the CSI-RS is configurable to adjust overhead and CSI estimation accuracy.

[0036] The specification defines a table showing the CSI-RS locations within a slot. Each row in the table shows the row number, port number, frequency domain density, CDM type, time and frequency (time / frequency) location (component resource location (k-bar, l-bar)), code division multiplexing (CDM) group index, and the location of each resource within the component resource ((RE, symbol), (k', l')). Here, the time / frequency location is the location of the CSI-RS time and frequency resource (component resource) corresponding to one port. The k-bar is a notation with an overlined "k". The k-bar indicates the starting resource element (RE) index of the component resource, and the l-bar indicates the starting symbol (OFDM symbol) index of the component resource.

[0037] The CDM group includes no CDM (N / A), FD-CDM2, CDM4, and CDM8. FD-CDM2 multiplexes two-port CSI-RS at the same time and frequency by multiplying a 2-length frequency domain (FD)-orthogonal cover code (OCC) in RE units (FD2). CDM4 multiplexes four-port CSI-RS at the same time and frequency by multiplying a 2-length FD-OCC and a 2-length time domain (TD)-OCC in RE units and symbol units (FD2TD2). CDM8 multiplexes eight-port CSI-RS at the same time and frequency by multiplying a 2-length FD-OCC and a 4-length TD-OCC in RE units and symbol units (FD2TD4).

[0038] (CSI Reporting Configuration) The CSI reporting configuration (CSI-ReportConfig) includes the codebook configuration (CodebookConfig), channel measurement resource (CMR), interference measurement resource (IMR), etc. The IMR may be at least one of zero power-interference measurement resource (ZP-IMR) and non-zero power-interference measurement resource (NZP-IMR).

[0039] The UE (User Environment) configures the codebook (CB) parameters (CodebookConfig) through higher-layer signaling (RRC signaling). The codebook configuration is included in the higher-layer (RRC) parameter CSI-ReportConfig.

[0040] In the codebook configuration, at least one codebook is selected from among several codebooks, including Type I Single Panel (typeI-SinglePanel), Type I Multi Panel (typeI-MultiPanel), Type II, and Type II Port Selection (typeII-PortSelection, PS).

[0041] The codebook parameters include parameters related to codebook subset restrictions (CBSRs) ("...Restriction" in CodebookConfig). The CBSR setting is a bit that indicates which PMI reports are allowed ("1") and which are not allowed ("0") for the precoder associated with the CBSR bit. Each bit in the CBSR bitmap corresponds to one codebook index / antenna port.

[0042] In this disclosure, the Codebook (CB), the CB for Type 1 / Type 2 / Type 2PS, the Extended CB based on the CB for Type 1 / Type 2 / Type 2PS, the CSI, and the PMI may be interpreted as mutually exclusive.

[0043] In this disclosure, CMR, NZP CSI-RS resources, and resourcesForChannelMeasurement may be interpreted as interchangeable. In this disclosure, ZP-IMR, CSI-IM resources, and csi-IM-ResourcesForInterference may be interpreted as interchangeable. In this disclosure, NZP-IMR, NZP CSI-RS resources for interferometry, and nzp-CSI-RS-ResourcesForInterference may be interpreted as interchangeable.

[0044] (PMI / Type 1 Codebook) The Type 1 codebook (Rel. 15) specifies both a Type 1 single-panel codebook and a Type 1 multi-panel codebook for base station panels. For the Type 1 single panel, the antenna model (antenna configuration) of the CSI antenna port array (logical configuration) is specified for (N1,N2). CSI-RS antenna port count P CSI-RS It is 2N1N2. In a Type 1 multi-panel, the number of CSI-RS antenna ports P CSI-RS And, (N g For N1 and N2, the antenna model of the CSI antenna port array (logical configuration) is defined.

[0045] In this disclosure, the first dimension, the N1 dimension, one of the horizontal domain and the vertical domain, and the horizontal domain may be interpreted as mutually exclusive. In this disclosure, the second dimension, the dimension perpendicular to the first dimension, the N2 dimension, the other of the horizontal domain and the vertical domain, and the vertical domain may be interpreted as mutually exclusive. In this disclosure, N1 and N2 may be substituted for each other, and the horizontal domain and the vertical domain may be substituted for each other.

[0046] In this disclosure, the terms N1 x N2 DFT vector, spatial domain (SD) vector, 2D-DFT vector, SD DFT vector, SD basis vector, SD beam, SD basis, precoder, beam, and vector may be interpreted as interchangeable.

[0047] In this disclosure, the terms port, antenna port, CSI-RS port, port index, and port number may be interpreted interchangeably.

[0048] In this disclosure, (N1, N2), the number of antenna ports in two dimensions, the antenna configuration, and the base station antenna layout may be interpreted as interchangeable. g In this disclosure, the number of panels, the number of antenna groups, and the number of antenna port groups may be interpreted as mutually interchangeable. In this disclosure, N1, the number of antennas in the first dimension, and the number of antenna ports in the first dimension may be interpreted as mutually interchangeable. In this disclosure, N2, the number of antennas in the second dimension, and the number of antenna ports in the second dimension may be interpreted as mutually interchangeable. In this disclosure, O1, the number of oversamplings in the first dimension, and O2, the number of oversamplings in the second dimension may be interpreted as mutually interchangeable. In this disclosure, N1O1, the number of beams in the first dimension, and the number of vectors in the first dimension may be interpreted as mutually interchangeable. In this disclosure, N2O2, the number of beams in the second dimension, and the number of vectors in the second dimension may be interpreted as mutually interchangeable.

[0049] In this disclosure, two polarizations, a first polarization and a second polarization, horizontal polarization and vertical polarization may be interpreted as interchangeable. In this disclosure, one polarization, one of the first polarization and the second polarization, and one of the horizontal polarization and vertical polarization may be interpreted as interchangeable. In this disclosure, co-phasing, phase difference, phase compensation between polarizations, and φ may be interpreted as interchangeable.

[0050] In the present disclosure, the Type 1 codebook, the Type 1 single-panel codebook (codebookType='typeI-SinglePanel'), and the Type 1 multi-panel codebook (codebookType='typeI-MultiPanel') may be mutually interchangeable.

[0051] ((Type 1 single-panel (SP) codebook)) For the Rel. 15 Type 1 single-panel CSI, the UE sets the upper-layer parameter of the codebook type (subType within type1 within codebookType within CodebookConfig) to the Type 1 single panel ('typeI-SinglePanel'). When the number of layers v ∉ {2, 3, 4}, the PMI value corresponds to three codebook indexes i 1,1 , i 1,2 , i2. When the number of layers v ∈ {2, 3, 4}, the PMI value corresponds to four codebook indexes i 1,1 , i 1,2 , i 1,3 , i2. When the number of layers v ∉ {2, 3, 4}, the composite codebook index i1 = [i 1,1 i 1,2 . When the number of layers v ∈ {2, 3, 4}, the composite codebook index i1 = [i 1,1 i 1,2 i 1,3 .

[0052] For P CSI-RS , the supported settings (value combinations) of (N1, N2) and (O1, O2) are specified in the specification. (N1, N2) indicates the number of 2D antenna elements and is set by the upper-layer parameters n1 - n2 within nrOfAntennaPorts within moreThanTwo within typeI-SinglePanel. n1 - n2 is a bitmap parameter of N1O1N2O2 bits. (O1, O2) is the 2D oversampling factor.

[0053] The precoding matrix for v = 1 is W l,m,n (v)It is expressed as follows. The precoding matrix for v=2 is W l,l',m,m',n (v) It is expressed as follows: P CSI-RS The precoding matrix for <16 and v=3,4 is W l,l',m,m',n (v) It is expressed as follows: P CSI-RS The precoding matrix for ≥16 and v=3,4 is W l,m,p,n (v) It is expressed as follows. The precoding matrix for v=5,6 is W l,l',l'',m,m',m'',n (v) It is expressed as follows. The precoding matrix for v=7,8 is Wl,l',l'',l''',m,m',m'',m''',n (v) It is expressed as follows: l,l',l'',l''' is i 1,1 and are determined by k1. m,m',m'',m''' are i 1,2 n is determined by and k2. n is determined by i2. p is P CSI-RS Of the (≥16) ports, the first half of the ports are 0 and the second half of the ports are 1.

[0054] The precoding matrix W can be expressed as the product of two matrices W1W2. W1 represents the wideband and long-term channel properties, and the codebook index i1 (for example, i 1,1 and i 1,2 It is represented by i. 1,1 and i 1,2 The beam selection in two dimensions is shown, respectively. W2 represents the frequency selectivity (subband) and short-term channel characteristics, and is represented by the codebook index i2. i2 may also represent the phase adjustment between the two polarizations. W1 may also be given by the following equation E1 using matrix B.

[0055] B represents L 2D DFT beams, each beam oversampled by (O1,O2).

[0056] If the rank is {1, 5, 6, 7, 8}, the codebook index for each PMI is i 1,1 ,i 1,2 , i2. If the rank is {2, 3, 4}, the codebook index for each PMI is i 1,1 ,i 1,2 ,i 1,3 i2. 1,3 These are mapped to k1 and k2 according to the specification table. At ranks 2, 3, and 4, the beams selected for different layers may differ when generating the PMI.

[0057] For a 1-layer CSI report and codebook mode (codebookMode) = 1, the codebook corresponds to index i, which represents the horizontal component of the beam. 1,1 =l=0,1,...,N1O1-1, and index i corresponding to the vertical component of the beam. 1,2 Includes =m=0,1,...,N2O2-1 and the corresponding subband indices i2=n=0,1,2,3. Antenna ports 3000 to 2999+P CSI-RS Precoding matrix W for one-layer CSI reporting using l,m,n (1) This is given by the following equation E2.

[0058] φ for precoding matrices n θ p u m , v l,m , v ~ l,m This is given by the following equation E3.

[0059] Here, [i 1,1 ,i 1,2 [i2] = [l,m,n]. l,m This is the DFT vector (SD basis vector, SD beam) with N1 rows and N2 columns, expressed as exp(j2πln1 / O1N1)×exp(j2πmn2 / O2N2), where n1=0,1,...,N1-1 and n2=0,1,...,N2-1, and specified by v and l. l,mThis shows one beam. Phase adjustment φ between the two polarizations. n =exp(jπn / 2), which represents the phase difference of the second polarization relative to the phase of the first polarization. θ p This shows the phase of the second half of the port relative to the phase of the first half of the port.

[0060] ((Type 1 Multi-Panel (MP) Codebook)) For Rel. 15 Type 1 Multi-Panel CSI, the UE sets the higher-level parameter of the codebook type (subType within type1 within codebookType in CodebookConfig) to Type 1 Multi-Panel ('typeI-MultiPanel'). Compared to a Type 1 Single-Panel Codebook, Rel. 15 Type 1 Multi-Panel CSI has N1, N2 in addition to the number of panels N g This is set. Compared to the Type 1 single panel codebook, the inter-panel co-phasing (phase compensation between panels) is as follows: 1,4 The following is added and reported for each panel: the same SD beam (DFT vector v l,m The SD basis index (l,m) is selected, and only the inter-panel phase difference is added and reported.

[0061] P CSI-RS For the supported (N g The settings (combinations of values) for (N1,N2) and (O1,O2) are defined in the specification. (N1,N2) are set by ng-n1-n2 within typeI-MultiPanel. 1,1 =l={0,1,...,N1O1-1} represents the horizontal components of the oversampled SD basis. 1,2 =m={0,1,...,N2O2-1} is the vertical component of the oversampled SD basis. q=1,...,N g i for -1 1,4,q =p={0,1,2,3} represents the number of panels. i2=n={0,1,2,3} represents the number of beams per panel.

[0062] The antenna setting parameters for the Type 1 multi-panel codebook are ng-n1-n2 (N g , N1, N2). In the existing specification, up to rank 4 is supported, and ranks 5 and above are not supported.

[0063] Each PMI value corresponds to codebook indices i1, i2. v is the RI value (number of layers). For v = 1, i1 = [i 1,1 i 1,2 i 1,4 . For v ∈ {2, 3, 4}, i1 = [i 1,1 i 1,2 i 1,3 i 1,4 .

[0064] When the codebook mode is set to 1, for N g = 2, i 1,4 = i 1,4,1 . For N g = 4, i 1,4 = [i 1,4,1 i 1,4,2 i 1,4,3 . When the codebook mode is set to 2, i 1,4 = [i 1,4,1 i 1,4,2 . i 1,4 is related to the number of panels N g and the codebook mode. Codebook mode 2 is supported only for N g = 2. [i 1,4,1 i 1,4,2 in codebook mode 2 corresponds to two polarization waves respectively. Each of the two values represents the wideband phase difference of the second panel (panel 1) with respect to the first panel (panel 0) in the corresponding polarization wave. Only one value of i g in N 1,4 = 2 and codebook mode 1 is reported. That one value represents the wideband phase difference of the second panel (panel 1) with respect to the first panel (panel 0).

[0065] When the codebook mode is set to 2, i2 = [i 2,0 i2,1 i 2,2 is. The number and value of i2 are related to the codebook mode and may be different from the type 1 single panel codebook. If subband reporting is set, i2 is an index for the subband. If wideband reporting is set, i2 is an index for the wideband. In codebook mode 1, the number and value of i2 are the same as those of the type 1 single panel codebook, and i2 has one value for each subband. In codebook mode 2 (N g = 2), the phase difference between subbands has three values and represents the phase difference between polarization and between panels.

[0066] Codebook mode 2 has a larger feedback overhead because it reports more phase differences for more accurate CSI. Also, codebook mode 2 is only supported for N g = 2.

[0067] The type 1 multi-panel codebook is based on the type 1 single panel codebook. In the type 1 multi-panel codebook, the codebook of the first panel (panel 0) follows the type 1 single panel codebook. The codebooks for other panels apply the same precoder and involve additional phase differences between multiple panels.

[0068] φ n , a p , b p , u m , v l,m for the precoding matrix are given by the following equation E4.

[0069] The precoding matrix for v-layer CSI reporting using antenna ports 3000 to 2999 + P CSI-RS is represented by W (v) . The precoding matrix for the i-th layer, the number of panels N g , for codebook mode X is represented by W l,m,p,n i,N_g,X . [i 1,1 , i 1,2 , i1,4 ,i2]=[l,m,p,n].

[0070] Codebook Modes 1 and N g For the value ={2,4}, the precoding matrix W for one-layer CSI reporting is used. l,m,p,n (1) is, W l,m,p,n 1,N_g,1 Represented by: Codebook Mode 1 and N g For ={2,4}, the precoding matrix W for two-layer CSI reporting is l,l',m,m',p,n (2) is (1 / sqrt(2))[W l,m,p,n (1,N_g,1) W l',m',p,n (2,N_g,1) It is represented by ]. Here, N g W for ={2,4} l,m,p,n 1,N_g,1 and W l,m,p,n 2,N_g,1 (N g W for =2 l,m,p,n 1,2,1 and W l,m,p,n 2,2,1 And, N g W for =4 l,m,p,n 1,4,1 and W l,m,p,n 2,4,1 And,) are given by the following equation E5.

[0071] Here, φ n =e jπn / 2 N g For =2, p=p1, N g For φ = 4, p = [p1, p2, p3]. p_1 , φ p_2 , φ p_3 This represents the inter-panel phase difference (inter-panel phase compensation). In each precoding matrix, the first and second rows correspond to the first panel (panel 0), the third and fourth rows correspond to the second panel (panel 1), the fifth and sixth rows correspond to the third panel (panel 2), and the seventh and eighth rows correspond to the fourth panel (panel 3). Since the same SD beam is selected for all panels, each row has the same v l,m It has. φ p_1This represents the phase difference between the second panel and the first panel. p_2 This represents the phase difference between the third panel and the first panel. p_3 This represents the phase difference between the fourth panel and the first panel.

[0072] Codebook Mode 2 and N g For =2, the precoding matrix W for one-layer CSI reporting. l,m,p,n (1) is, W l,m,p,n 1,2,1 Represented by Codebook Mode 2 and N g For =2, the precoding matrix W for two-layer CSI reporting l,l',m,m',p,n (2) is (1 / sqrt(2))[W l,m,p,n 1,2,2 W l',m',p,n 2,2,2 It is represented by ]. Here, W l,m,p,n 1,2,2 and W l,m,p,n 2,2,2 This is given by the following equation E6.

[0073] In each precoding matrix, the first and second rows correspond to the first panel (panel 0), and the third and fourth rows correspond to the second panel (panel 1). Since the same SD beam is selected for all panels, each row corresponds to the same v l,m It has p=[p1 p1] and n=[n0,n1,n2]. p_1 This represents the phase difference between the second panel (panel 1) and the first panel (panel 0) in the first polarization. p_2 This represents the phase difference between the second panel (panel 1) and the first panel (panel 0) in the second polarization. n_0 This represents the phase difference between the second polarization of the first panel and the first polarization of the first panel for each subband. n_1 This represents the phase difference between the first polarization of the second panel and the first polarization of the first panel for each subband. n_2 This represents the phase difference between the second polarization of the second panel and the first polarization of the first panel for each subband.

[0074] (Contents of Type 1SP CB) In a codebook mode 1 with a general structure, for RI=1 to 8, one or more SD basis vectors and one or more phase adjustments are reported as follows:

[0075] ◆RI=1 ―◆One or more SD basis vectors are {beam1}. beam1 is [i 1,1 ,i 1,2 It is displayed by ]. —◆Phase adjustment is {phi}.

[0076] ◆RI=2 ―◆One or more SD basis vectors are {beam1,beam2}. beam2 is offset i 1,3 It is displayed by [this method]. —◆The phase adjustment is {phi,-phi}.

[0077] ◆RI=3 ―◆One or more SD basis vectors are {beam1, beam2, beam1}. beam2 is offset representation i 1,3 It is displayed by: ―◆Phase adjustment is {phi,phi,-phi}.

[0078] ◆RI=4 ―◆One or more SD basis vectors are {beam1,beam2,beam1,beam2}. beam2 is offset i 1,3 It is displayed by: ―◆The phase adjustment is {phi,phi,-phi,-phi}.

[0079] ◆RI=5 ―◆One or more SD basis vectors are {beam1,beam1,beam2,beam2,beam3}. beam2 / beam3 has a predefined offset from beam1. ―◆The phase adjustment is {phi,-phi,+1,-1,1}.

[0080] ◆RI=6 ―◆One or more SD basis vectors are {beam1,beam1,beam2,beam2,beam3,beam3}. beam2 / beam3 has a predefined offset from beam1. ―◆Phase adjustment is {phi,-phi,phi,-phi,+1,-1}.

[0081] ◆RI=7 ―◆One or more SD basis vectors are {beam1,beam1,beam2,beam3,beam3,beam4,beam4}. beam2 / beam3 / beam4 have a predefined offset from beam1. ―◆The phase adjustment is {phi,-phi,phi,+1,-1,+1,-1}.

[0082] ◆RI=8 ―◆One or more SD basis vectors are {beam1,beam1,beam2,beam2,beam3,beam3,beam4,beam4}. beam2 / beam3 / beam4 have a predefined offset from beam1. ―◆The phase adjustment is {phi,-phi,phi,-phi,+1,-1,+1,-1}.

[0083] phi is the inter-polarization indication φ. Phase adjustment between multiple layers is defined. In two layers using the same SD beam, a phase adjustment offset of -1 is applied to achieve inter-layer orthogonality.

[0084] Thus, the codebook index reported for the SD basis vector is, in the case of rank={2,2,4}, [i 1,1 ,i 1,2 ,i 1,3 ] and otherwise [i 1,1 ,i 1,2 The reported phase adjustment index is i2.

[0085] Figure 1 shows i in a two-layer CSI report using a Type 1SP CB. 1,3 An example of mapping from to k1 and k2 (Table T1-3) is shown. Figure 2 shows i in 3-layer and 4-layer CSI reports using Type 1SP CB. 1,3 An example of mapping from to k1 and k2 (Table T1-4) is shown. As shown in these examples, i 1,3 It is either 1 bit or 2 bits.

[0086] (SD NES) Network energy saving (NES) is being considered that can reduce the power consumption of base stations in the domains of frequency, time, space, and power.

[0087] In NES, a single CSI reporting configuration (CSI-ReportConfig) contains multiple CSI reporting subconfigurations (a list of CSI-ReportSubConfig[-r18]). Multiple subconfigurations allow the base station to obtain multiple CSIs for multiple antenna patterns / power levels and adapt multiple antenna patterns / power levels for NES. A single subconfiguration corresponds to a single CSI report for a specific antenna pattern / power level. A subconfiguration may include at least one parameter of type 1 or type 2 for spatial domain (SD) [adaptation] and power domain (PD) [adaptation], or it may include parameters from an existing CSI reporting configuration.

[0088] In massive MIMO systems, the use of multiple sub-array antennas, formed by using a portion of multiple antenna elements, is being considered. Type 1 and Type 2 spatial domain (SD) adaptations are being considered for multiple spatial elements (transceiver units (TXRUs) and the physical antenna elements connected to them) mapped to a logical antenna port. Type 1 switches all of the multiple spatial elements mapped to a single logical antenna port on / off. Type 2 switches a portion of the multiple spatial elements mapped to a single logical antenna port on / off.

[0089] The sub-setting parameters (a1-parameters) for SD Type 1 are (N1, N2) [for indicating multiple spatial elements] and N [for multi-panel codebooks]. gThe sub-configuration parameters for SD type 2 include the antenna port subset indicator (portSubsetIndicator[-r18]), codebook constraints (restriction), and rank constraints. The sub-configuration parameters for PD type 2 include the NZP CSI-RS resource list (nzp-CSI-RS-resourceList[-r18]). The sub-configuration parameters for PD include the power offset value (powerOffset[-r18]).

[0090] (Port Subset Indicator) The port subset indicator indicates a subset of CSI-RS antenna ports used for CSI calculations of a subconfiguration. In the bit string, each bit corresponds to an antenna port. When a bit is set to 1, the corresponding port is enabled for CSI calculations corresponding to the subconfiguration. When a bit is set to 0, the corresponding port is not enabled for CSI calculations corresponding to the subconfiguration. The size of the bit string is equal to P bits, where P = 2 / 4 / 8 / 12 / 16 / 24 / 32 represents the number of ports of one or more NZP CSI-RS resources in the resource set for channel measurements associated with CSI-ReportConfig.

[0091] In the improvement of the Type 1 SP CB in Rel. 19 for {48, 64, 128} CSI-RS ports, with respect to the port subset indicator [bitmap / antenna port subset indicator (portsubsetIndicator)] [from Rel. 18 SD NES Type 1], it is being considered to extend the bitmap by adding values ​​p48, p64, and p128 having appropriate [bitmap] lengths [corresponding to {48, 64, 128} CSI-RS ports]. K is 32 < P (or P CSI-RS This is the number of NZP CSI-RS resources aggregated to achieve ≤ 128.

[0092] (Rel. 19 MIMO Consideration) Because the maximum number of CSI-RS ports, 32, is greater than the maximum number of layers, 8, the UE can measure the status of many channels and improve measurement accuracy.

[0093] Since Rel. 19, massive MIMO using more than 32 ports has been considered.

[0094] A CSI supporting up to 128 CSI-RS ports is being considered, targeting FR1. Specifically, the following items are being considered: ◆ Item 2a: An improvement to the Type 1 codebook that supports up to 128 CSI-RS ports in total across all resources, based on an extension of the existing codebook and assuming existing CSI-RS resources (with up to 32 CSI-RS ports per resource). ◆ Item 2b: An improvement to the Type 2 codebook that supports up to 128 CSI-RS ports in total across all resources, based on an extension of the existing codebook and assuming existing CSI-RS resources (with up to 32 CSI-RS ports per resource), without changing any codebook parameters other than introducing an additional value for the codebook parameter for the number of ports. ◆Item 2c: Extension of CRI-based CSI reporting (reporting of CQI / PMI / RI calculated for each CRI for one or more CRIs) for hybrid beamforming that supports up to 128 CSI-RS ports in total across all resources, using up to 32 CSI-RS ports per resource, without requiring a new codebook design. ◆Item 2d: For 6 / 8Rx low complexity receivers supporting more than four layers, SRS port grouping and association of SRS port groupings to two codewords are being considered using existing codebooks. The 6 / 8Rx low complexity receiver may use six or eight Rx antennas. Extensions to the mapping from codewords to layers, DL resource placement, CSI feedback, and DCI format are not required.

[0095] <Expansion of CSI-RS resources to support up to 128 ports> To support large antenna arrays at the higher frequencies of FR1, an expansion of CSI-RS resources to support up to 128 ports is being considered.

[0096] To support 48, 64, or 128 ports, K = 2, 3, or 4 existing NZP CSI-RS resources may be aggregated. Each NZP CSI-RS resource may use the same number of ports. K NZP CSI-RS resources may use the same QCL, PCoffset, and PCoffsetSS. K NZP CSI-RS resources may be associated with the same CSI-RS resource set. K NZP CSI-RS resources may be located in one slot or in two consecutive slots. The basic UE function may support K NZP CSI-RS resources being located in one slot, while the optional UE function may support K NZP CSI-RS resources being located in two slots.

[0097] To support single-slot transmission, resource-specific settings of even-indexed PRBs (evenPRBs) or odd-indexed PRBs (oddPRBs) may be permitted for a density of 0.5 RE / RB / port.

[0098] For AP-CSI-RS, resource-specific slot offset instructions may be permitted when K resources are located in two consecutive slots. These instructions may be one bit per resource via RRC IE.

[0099] The following multiple configurations may be supported for the total number of ports P across K aggregated resources, K, and the number of ports N per existing NZP CSI-RS resource: ◆P=48, K=2, N=24 ◆P=48, K=3, N=16 ◆P=64, K=2, N=32 ◆P=64, K=4, N=16 ◆P=128, K=4, N=32

[0100] For a setting of P=128, K=4, and N=32, two FDM-modified frequency resources and two TDM-modified time resources may be allocated within one slot, along with four existing CSI-RS resources with K=4.

[0101] <Rel. 19 Type 1SP CB> In Rel. 19 Type 1SP CB, the following two schemes are supported.

[0102] ◆Rel. 19 Type 1SP CB Scheme A (Economical). This CB uses the following principles, W1 and W2. —◆Principle Rel. 15 Type 1SP CB is extended to new (N1,N2) using simplification. This CB supports only Codebook Mode 1. This CB follows the general CB structure for fewer than 16 ports. —◆W1 —◆For RI≦4, W1 is almost the same as the existing Type 1SP CB and has the following structure. —◆The initial SD basis vector selection is the existing [i 1,1 ,i 1,2 ]. ---◆Other SD basis vector selections use existing offset display i that uses existing mapping between SD basis vectors and layers. 1,3 (2 bits). ---◆For RI > 4, W1 is extended based on the existing type 1SP CB and has the following structure. ---◆The first SD basis vector selection is the existing (i 1,1 ,i 1,2 ) is. ---◆Other SD basis vector selections are new displays, but are existing mappings between SD basis vectors and layers. That is, the subsequent two SD basis vectors (RI=5 to 6) or three SD basis vectors (RI=7 to 8) can be freely selected and are orthogonal in at least one dimension. ---◆W2 ---◆W2 is a single interpolarization phase adjustment report, similar to the existing Type 1SP CB, and has the following structure: ---◆Two bits from {+1,+j,-1,-j}. ---◆The phase adjustment structure for each layer follows the existing Type 1SP CB.

[0103] ◆Rel. 19 Type 1SP CB Scheme B (Advanced). This CB uses the following principles, W1 and W2. ---◆Principle This CB reuses the SD basis vectors of Rel. 16 Extended Type 2 CB to determine independent SD basis vectors for multiple layers. ---◆W1 ---◆For RI≦4, W1 has independent SD basis vectors for each layer and has the following structure. ---◆Common representation for layers (q1,q2). ---◆SD basis vector representation with ceil(log2(N1N2)) bits for each layer. ---◆For RI>4, W1 has independent SD basis vectors for every two layers and has the following structure. ---◆Common representation for layers (q1,q2). ---◆Combinatorial indication of ceil(v / 2) SD basis vectors for RI=v. The combined representation has ceil(log2(C(N1N2,ceil(v / 2)))) bits. ---◆The mapping between the SD basis vectors and two layers follows the existing type 1CB, except that when v is odd, the last vector is applied to the orphan (the remaining single layer of two layers). ---◆W2 ---◆For RI≦4, W2 is a layer-specific interpolarization phase adjustment report and has the following structure: ---◆Two bits from {+1,+j,-1,-j} for each layer. ---◆For RI>4, W2 has the following structure: ---◆Two bits from {+1,+j,-1,-j} for an isolated layer. ---◆One bit from {(1,-1),(j,-j)} to achieve interlayer orthogonality for two layers sharing the same SD basis vector.

[0104] Rel. 19 Type 1SP CB may support wideband and subband reporting. The method of displaying the SD basis vectors may be the same between wideband and subband reporting. The only difference between wideband and subband reporting may be the method of displaying the phase adjustment. In subband reporting of Scheme A, the difference in payload size between rank=1 and rank>1 may be represented only by the display of additional SD basis vectors. In subband reporting of Scheme B, the difference in payload size between rank=1 and rank>1 arises from both the layer-specific SD basis vector display and the layer-specific phase adjustment display. Therefore, in Scheme B, the payload size gap between different ranks becomes larger.

[0105] <(N1,N2) settings and port index> Restricted (N1,N2) settings may be supported.

[0106] In CBs other than Rel. 19 Extended Type 2PS CB, P={48,64,128} may be supported. Here, P=64 may be a basic UE function. In CBs other than Rel. 19 Extended Type 2PS CB, P={48,64} may be supported. Here, P=64 may be a basic UE function.

[0107] A mapping between the CSI-RS resource index, the port index for each resource, and the port index for CSI / PMI may be established via RRC signaling. This mapping may be based on at least one of the following multiple mapping methods: ◆ Mapping method 1: N1-dimensional partitioning / integration ◆ Mapping method 2: N2-dimensional partitioning / integration

[0108] Multiple different mapping methods may support the coexistence of multiple different existing (N1,N2) settings.

[0109] For the total number of ports P across aggregated K resources, the number of new ports (N1, N2), the number of existing ports (N1, N2) for coexistence, K, and the mapping method, the following multiple settings may be supported. ◆Setting 1: P=48, New (N1,N2)=(8,3), Existing (N1,N2)=(4,3), K=2, Mapping Method 1 ◆Setting 2: P=48, New (N1,N2)=(8,3), Existing (N1,N2)=(8,1), K=3, Mapping Method 2 ◆Setting 3: P=48, New (N1,N2)=(6,4), Existing (N1,N2)=(6,2), K=2, Mapping Method 2 ◆Setting 4: P=64, New (N1,N2)=(16,2), Existing (N1,N2)=(8,2), K=2, Mapping Method 1 ◆Setting 5: P=64, New (N1,N2)=(16,2), Existing (N1,N2)=(16,1), K=2, Mapping Method 2 ◆Setting 6: P=64, New (N1,N2)=(16,2), Existing (N1,N2)=(4,2), K=4, Mapping Method 1 ◆Setting 7: P=64, New (N1,N2)=(8,4), Existing (N1,N2)=(4,4), K=2, Mapping Method 1 ◆Setting 8: P=64, New (N1,N2)=(8,4), Existing (N1,N2)=(8,2), K=2, Mapping Method 2 ◆Setting 9: P=64, New (N1,N2)=(8,4), Existing (N1,N2)=(8,1), K=4, Mapping Method 2 ◆Setting 10: P=128, New (N1,N2)=(16,4), Existing (N1,N2)=(16,1), K=4, Mapping Method 2 ◆Setting 11: P=128, New (N1,N2)=(16,4), Existing (N1,N2)=(4,4), K=4, Mapping method 1 ◆Setting 12: P=128, New (N1,N2)=(8,8), Existing (N1,N2)=(8,2), K=4, Mapping method 2

[0110] Figure 3 shows an example of CSI-RS resource and port index mapping method 1. In this example, setting 7 is used, and K=2 CSI-RS resources are aggregated in N1 dimension. Each CSI-RS resource uses the existing (N1,N2)=(4,4) antenna configuration. First, the CSI-RS port index is mapped to the N1 direction of the first polarization, and then the CSI-RS port index is mapped to the N1 direction of the second polarization.

[0111] Figure 4 shows an example of CSI-RS resource and port index mapping method 2. In this example, setting 8 is used, and K=2 CSI-RS resources are aggregated in N2 dimensions. Each CSI-RS resource uses the existing (N1,N2)=(8,2) antenna configuration. First, the CSI-RS port index is mapped to the N1 direction of the first polarization, and then the CSI-RS port index is mapped to the N1 direction of the second polarization.

[0112] Figure 5 shows an example of the selection of the initial SD basis in Rel. 19 Type 1SP CB Scheme A. In this example, (N1,N2)=(8,4) and (O1,O2)=(4,4), and the initial SD basis is represented by (i1,i2). (i1,i2) may have the ceil(log2(N1O1)) bit and the ceil(log2(N2O2)) bit, respectively.

[0113] Figure 6 shows an example of the selection of other SD bases in the case RI ≤ 4. In this example, the number of candidates for the other (second) SD base is 4. For RI = 3, 4, the second SD base is a 2-bit i 1,3 It is represented by [this].

[0114] Figures 7 and 8 show an example of selecting an alternative SD basis in the case of RI > 4. In this example, the number of candidates for the alternative (second) SD basis is (N1-1)N2O2 + (N2-1)N1O1 - (N1-1)(N2-1). In selecting an alternative SD basis, the first step is performed for all other SD bases. The first step is to select one dimension using one bit.

[0115] As shown in the example in Figure 7, the N1 dimension is selected for the case where the value in 1 bit representation is "0". As shown in the example in Figure 8, the N2 dimension is selected for the value in 1 bit representation is "1". The second step is performed for each other SD basis. The second step is to select one SD basis range from (N1,N2) SD basis ranges by selecting one orthogonal SD basis from (N1,N2) [unoversampled] orthogonal SD basis using the ceil(log2(N1)) bit and ceil(log2(N2)) bit. One SD basis range contains (O1,O2) consecutive SD basis elements. The third step is performed for each other SD basis. If the 1-bit representation is "0", the third step uses the ceil(log2(O2)) bit to select one SD basis from 02 SD bases in N2 dimensions at the same N1-dimensional position as the first SD basis within the selected SD basis range. If the 1-bit representation is "1", the third step uses the ceil(log2(O1)) bit to select one SD basis from 01 SD bases in N1 dimensions at the same N2-dimensional position as the first SD basis within the selected SD basis range.

[0116] In scheme A, RI=3,4 only, for the improvement of Rel. 19 type 1SP CB for 48,64,128 CSI-RS ports, i for (N1,=3,N2=2) from table T1-4 1.3 The existing mapping from (k1,k2) will be used for all newly supported (N1,N2) values.

[0117] i for scheme A and RI=3,4 1.3 The values ​​follow the existing type 1CB. For scheme A and RI=2, the existing mapping in table T1-4 is reused, and since there are no cases where N2=1 for more than 32 ports, the first two cases from table T1-3 (the case where N1>N2>1 and the case where N1=N2) are reused for multiple different (N1,N2) settings.

[0118] (Issue 1) Rel. 19 Type 1SP CB for 48, 64, 128 CSI-RS ports can be configured with Rel. 18 SD NES scheme. If the number of bits with a value of 1 in the port subset indicator (bitmap portSubsetIndicator) is 32 or less (indicating ports 32, 24, 12, 8, and 4), the NW antenna configuration (N1, N2) after the port subset indicator is changed to (N1', N2'). 1.3 The defined mapping from (k1,k2) may not work for (N1',N2'), especially for N2'=1. For example, the number of CSI-RS ports P CSI-RS =16, (N1,N2)=(8,1), i 1.3 In the mapping from (k1,k2), k2=O2 is not an option.

[0119] (Issue 2) When Rel. 19 Type 1SP CB is expanded to the existing number of ports (e.g., 32, 24, 12, 8, 4), i 1.3 The choice of which mapping from (k1,k2) to (k1,k2) to be used has not been sufficiently considered.

[0120] (Issue 3) When a Rel. 19 type 1SP CB is configured for the existing number of ports along with the Rel. 18 SD NES scheme, i 1.3 The choice of which mapping from (k1,k2) to (k1,k2) to be used has not been sufficiently considered.

[0121] Thus, if the display for SD base selection is not adequately considered, there is a risk of a decrease in communication quality / throughput.

[0122] Therefore, the inventors considered the representation for SD basis selection and conceived the following embodiments.

[0123] The embodiments of this disclosure will be described in detail below with reference to the drawings. Each wireless communication method according to the embodiments may be applied individually or in combination.

[0124] (Various substitutions) In this disclosure, words enclosed in parentheses () may indicate an explanation of the preceding word (e.g., an explanation of spelling), a paraphrase, a specific example, or supplementary explanation. Also, in this disclosure, words enclosed in square brackets [] may be interpreted as part of the overall meaning of the text, or they may be interpreted as being excluded (ignored). Note that parentheses () and square brackets [] may be used for purposes / meanings other than those described above.

[0125] In this disclosure, "A / B" and "at least one of A and B" may be interpreted as mutually exclusive. In this disclosure, "A / B / C" may mean "at least one of A, B, and C".

[0126] In this disclosure, terms such as notice, activate, deactivate, indicate (or specify), select, configure, update, and determine may be interpreted interchangeably. In this disclosure, terms such as support, control, controllable, operate, and capable of operating may be interpreted interchangeably.

[0127] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-layer parameters, fields, Information Elements (IE), settings, etc., may be interpreted interchangeably. In this disclosure, Medium Access Control elements (MAC Control Elements (CE)), update commands, activation / deactivation commands, etc., may be interpreted interchangeably.

[0128] In this disclosure, the upper layer signaling may be any or a combination thereof, such as Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and other messages (e.g., messages from the core network, such as positioning protocol messages (e.g., NR Positioning Protocol A (NRPPPa) / LTE Positioning Protocol (LPP)) messages).

[0129] In this disclosure, MAC signaling may include, for example, MAC Control Elements (MAC CEs) and MAC Protocol Data Units (PDUs). Broadcast information may include, for example, Master Information Blocks (MIBs), System Information Blocks (SIBs), Remaining Minimum System Information (RMSIs), and Other System Information (OSIs).

[0130] In this disclosure, physical layer signaling may include, for example, Downlink Control Information (DCI) and Uplink Control Information (UCI).

[0131] In this disclosure, ceil(x), the ceiling function, and the ceiling function may be interpreted as interchangeable. In this disclosure, floor(x), the floor function, and the floor function may be interpreted as interchangeable. In this disclosure, ceil(x) and floor(x) may be interpreted as interchangeable. In this disclosure, sqrt(x), the square root of x, and the root x may be interpreted as interchangeable. In this disclosure, x mod y, mod(x, y), the mod function, and the modulo operation may be interpreted as interchangeable. In this disclosure, Σi=M M+N-1 f(i), Σ i=M M+N-1 f i f(i) or f over i = M, M+1, ..., M+N-1 i The sum of f(M) + f(M+1) + ... + f(M+N-1), f M +f M+1 +...+f M+N-1 , can be read interchangeably. C(n,k) is the number of combinations of choosing k values ​​from n values ​​(combinatorial coefficient), binomial coefficients, n C k , C n k , may be interpreted as mutually exclusive. In this disclosure, x / / y and floor(x / y) may be interpreted as mutually exclusive.

[0132] In this disclosure, A b The notations A_b, Ab, and A with a b placed to the lower right may be interpreted as interchangeable. In this disclosure, A c The notation A^c, with a c superscripted above A, may be interpreted as interchangeable. In this disclosure, A b c The notation A_b^c, where b is placed to the lower right of A and c is placed to the upper right of A, may be interpreted as being interchangeable. In this disclosure, x ~ x may be represented by placing a ~ above x, or it may be called x tilde. In this disclosure, x - x may be represented by placing a hyphen above it, or it may be called an x-bar. In this disclosure, x ＾ This can also be represented by placing a caret (^) above x, or it may be called an x-hat.

[0133] In this disclosure, FR may be at least one of FR1, FR2, FR2-1, FR2-2, FR3, subterahertz, and terahertz. In this disclosure, the frequency range corresponding to FR1 may be 410–7125 MHz. In this disclosure, FR2 may include FR2-1 and FR2-2, the frequency range corresponding to FR2-1 may be 24250–52600 MHz, and the frequency range corresponding to FR2-1 may be 52600–71000 MHz.

[0134] In this disclosure, the terms "indicate," "report," and "select" may be interpreted as interchangeable.

[0135] In this disclosure, "resource" and "resource set" may be interpreted interchangeably.

[0136] In this disclosure, CSI-RS resource, P / SP / A-CSI-RS resource, NZP CSI-RS resource, CMR, active [CSI-RS] resource, active [CSI-RS] port, and CSI-RS port within CSI-RS resource may be interpreted as equivalent to each other.

[0137] In this disclosure, the cases in which [Rel. 18] NES [at least one of SD type 1 or SD type 2 and PD] is configured, the cases in which the CSI reporting configuration (CSI-ReportConfig) includes a list of L subconfigurations [provided by csi-ReportSubConfigToAddModList], and the cases in which a port subset instruction is configured may be interpreted as one another.

[0138] In this disclosure, the cases in which a [Rel. 19] Type 1SP codebook is configured, the cases in which multiple CSI-RS resources are configured / aggregated for more than 32 (48, 64, or 128) CSI-RS ports, and the cases in which a CSI-ReportConfig includes the configuration of multiple CSI-RS resources using more than 32 (48, 64, or 128) CSI-RS ports may be interpreted as one another.

[0139] In this disclosure, existing Type 1SP CB, [Rel. 15] Type 1SP CB, and Type 1SP CB for 32 or fewer ({2, 4, 8, 12, 16, 24, 32}) [CSI-RS] ports may be interpreted as one another.

[0140] In this disclosure, the following terms may be interpreted interchangeably: Novel Type 1SP CB, Rel. 19 Type 1SP CB, Scheme A of Rel. 19 Type 1SP CB, Scheme B of Rel. 19 Type 1SP CB, and Extended CB for more than 32 ({48, 64, 128}) [CSI-RS] ports based on Type 1SP CB.

[0141] In this disclosure, Rel. 18 SD NES scheme configuration and port subset indicator (bitmap portSubsetIndicator) may be interpreted interchangeably. In this disclosure, the statement that the number of bits with a value of 1 in the port subset indicator is 32 or less and the statement that the port subset indicator indicates 32 or fewer ports may be interpreted interchangeably.

[0142] (Wireless communication method) The UE may receive a setting for CSI reporting using Rel. 19 Type 1SP CB (Extended Codebook), or a setting for Rel. 18 SD NES scheme (Port Subset Instruction). The UE may control the transmission of index reports in Rel. 19 Type 1SP CB.

[0143] In this disclosure, the index is i 1.3, may be interpreted as mutually interchangeable. In this disclosure, the two-dimensional antenna setting, the NW antenna setting, (N1, N2), may be interpreted as mutually interchangeable. In this disclosure, the oversampling factor, at least one of (O1, O2), may be interpreted as mutually interchangeable. In this disclosure, the first information, at least one of Table T1-3 and Table T1-4, may be interpreted as mutually interchangeable. In this disclosure, a part of the first information, specific cases in Table T1-3 and Table T1-4, Mapping A, may be interpreted as mutually interchangeable. In this disclosure, the second information, Mapping B, may be interpreted as mutually interchangeable. In this disclosure, the value obtained by changing the two-dimensional antenna setting by the port subset instruction, the NW antenna setting after the port subset instruction, (N1', N2'), may be interpreted as mutually interchangeable.

[0144] <Embodiment 1> This embodiment relates to Issue 1.

[0145] If a Rel. 19 type 1SP CB for 48,64,128 CSI-RS ports is configured with a Rel. 18 SD NES scheme, and the number of bits with a value of 1 in the port subset indicator (bitmap portSubsetIndicator) is 32 or less (indicating ports 32, 24, 12, 8, and 4), then i for RI=2 1.3 In response to this, at least one of the following options 1-x may be applied.

[0146] <<Option 1-1>> For RI=2, the mapping defined for Rel. 19 type 1SP CB for 48,64,128 CSI-RS ports may be reused. The mapping is for the first two cases in table T1-3. 1.3 The mapping may be from (k1,k2). The choice of mapping may be determined based on the NW antenna configuration (N1,N2).

[0147] <<Option 1-2>> For RI=2, the mapping defined for Rel. 19 type 1SP CB for 48,64,128 CSI-RS ports may be reused. The mapping is for the first two cases in table T1-3. 1.3 The mapping may also be from (k1,k2). Which mapping to use may be determined based on the NW antenna configuration (N1',N2') after the port subset instruction.

[0148] The 64 ports with (N1,N2)=(8,4) become 32 ports with (N1',N2')=(4,4) after the port subset instruction. Figure 9 shows two examples of cases in Table T1-3 related to options 1-1 and 1-2 of Embodiment 1. In Option 1, the mapping for the first case N1>N2>1 is applied. In Option 2, the mapping for the second case N1=N2 is applied.

[0149] <<Option 1-3>> The mappings defined in Table T1-3 for all cases of Rel. 15 type 1SP CB for RI=2 (cases where N1>N2>1, N1=N2, N1=2 and N2=1, and N1>2 and N2=1) may be reused. Which mapping to use may be determined based on the NW antenna settings (N1',N2') after the port subset instruction.

[0150] If a specific (N1',N2') setting is not supported, some cases in table T1-3 may be removed. For example, if (N1',N2')=(2,1) is not supported, the third case is unnecessary. This is reasonable because it is unlikely that more than 32 ports would be used with the default (N1,N2) setting to send only 4 ports.

[0151] If a Rel. 19 type 1SP CB for 48,64,128 CSI-RS ports is configured with a Rel. 18 SD NES scheme, and the number of bits with a value of 1 in the port subset indicator (bitmap portSubsetIndicator) is 32 or less (indicating ports 32, 24, 12, 8, and 4), then i for RI=3,4 1.3 In response to this, at least one of the following options 2-x may be applied.

[0152] <<Option 2-1>> For RI=3,4, the mapping defined for Rel. 19 type 1SP CB for 48,64,128 CSI-RS ports may be reused. The mapping is for the case (N1=3,N2=2) in table T1-4. 1.3 This could be a mapping from (k1,k2). This mapping may be called mapping A.

[0153] For multiple distinct (N1,N2) values, there may be only one mapping to be used.

[0154] For specific NW antenna settings (N1', N2') after port subset instruction, some mappings may be invalid, and the UE may perform i based on those mappings. 1.3 It is not necessary to report this. Figure 10 shows an example of mapping A in table T1-4 related to option 2-1 of embodiment 1. For example, if N2'=1, i 1.3 The two values ​​do not need to be reported by the UE. The two values ​​correspond to i (k1,k2)=(0,O2) and (O1,O2), respectively. 1.3 =1 or 2 is also acceptable.

[0155] <<Option 2-2>> The mapping to use may be determined based on the NW antenna settings (N1', N2') after the port subset instruction. In addition to mapping A, several other mappings may be defined.

[0156] All or part of the mappings in table T1-4 may be defined. Which mappings apply to the NW antenna settings (N1', N2') may be defined or explicitly set by the NW.

[0157] If a specific (N1',N2') setting is not supported, some cases in table T1-4 may be removed. For example, if (N1',N2')=(2,1) is not supported, the third case is unnecessary. This is reasonable because it is unlikely that only 4 ports will be sent using the initial settings (N1,N2) for more than 32 ports. For example, if 8 ports after a port subset instruction are not supported, the third case (N1=6,N2=1) and the fourth case (N1=2,N2=2) are unnecessary.

[0158] A new mapping may be defined. This new mapping may be called mapping B. Figure 11 shows an example of mapping B according to option 2-2 of Embodiment 1. In addition to table T1-4 which contains mapping A, a new table which does not contain mapping A but contains mapping B may be defined in the specification, or a new table which contains both mapping A and mapping B may be defined in the specification, or table T1-4 may be modified to include mapping B.

[0159] If N2'=1, mapping B may be selected / applied by the UE. If N2'>1, mapping A may be selected / applied by the UE.

[0160] Variation: Mappings A and B may be explicitly configured by the network using new parameters for CSI reporting sub-configuration.

[0161] Even for N2'=1 using mapping B, some mappings may be disabled for specific NW antenna settings (N1',N2') after port subset instruction. For example, if N1'<4, i 1.3 =3 may be invalid. For example, if N1' < 3, i 1.3 =2,3 may be invalid. UE is based on the invalid mapping i 1.3It is not necessary to report this. The difference in this case is that invalid mappings in the defined mapping for each (N1',N2') may be excluded, or invalid mappings may exist in the defined mapping table and i based on invalid mappings for a specific NW antenna configuration (N1',N2') 1.3 Alternatively, you could define a UE behavior that does not report this.

[0162] If a Rel. 19 type 1SP CB for 48,64,128 CSI-RS ports is configured with a Rel. 18 SD NES scheme, and the number of bits with the value 1 in the port subset indicator (bitmap portSubsetIndicator) is greater than 32, then tables T1-3 / T1-4 may be used.

[0163] According to Embodiment 1, a Rel. 19 Type 1SP CB for more than 32 CSI-RS ports is configured with a Rel. 18 SD NES scheme, and even if the port subset instruction indicates 32 or fewer ports, the UE will use an appropriate i 1.3 It is possible to determine this.

[0164] <Embodiment 2> This embodiment relates to issue 2.

[0165] When Rel. 19 Type 1SP CB is expanded to the existing number of ports (e.g., 32, 24, 12, 8, 4), the i for each NW antenna setting (N1, N2) for RI=2,3,4 1.3 Alternatively, the mapping defined in tables T1-3 / T1-4 may be reused.

[0166] In the existing specifications, there is no mapping for 16, 24, and 32 port cases for RI=3 and 4. For RI=3 and 4, a new mapping may be defined for the extended Rel. 19 type 1SP CB case with 16, 24, and 32 ports. For N2=1, for example (N1,N2)=(8,1),(12,1),(16,1), mapping B may be defined / applied. For N2>1, mapping A may be defined / applied.

[0167] The following multiple settings may be supported for the number of ports P and (N1,N2): ◆P=16, (N1,N2)=(4,2) ◆P=16, (N1,N2)=(8,1) ◆P=24, (N1,N2)=(4,3) ◆P=24, (N1,N2)=(6,2) ◆P=24, (N1,N2)=(12,1) ◆P=32, (N1,N2)=(4,4) ◆P=32, (N1,N2)=(8,2) ◆P=32, (N1,N2)=(16,1)

[0168] According to Embodiment 2, even when the Rel. 19 Type 1SP CB is expanded to 32 ports or less, the UE will provide appropriate i 1.3 It is possible to determine this.

[0169] <Embodiment 3> This embodiment relates to issue 3.

[0170] When a Rel. 19 type 1SP CB is configured for an existing number of ports along with a Rel. 18 SD NES scheme, i 1.3 At least one of the following options x may be applied to the given situation.

[0171] <<Option 1>> For RI=2,3,4, the mapping defined in tables T1-3 / T1-4 for each NW antenna setting (N1,N2) may be reused.

[0172] The mapping may be determined based on the configured (N1,N2). After the port subset instruction, some mappings become invalid, and the UE does not use that mapping. 1.3 You don't need to report it.

[0173] <<Option 2>> For RI=2,3,4, the mapping defined in table T1-3 / T1-4 for each NW antenna setting (N1',N2') after the port subset instruction may be reused.

[0174] Even if the defined mapping table is the same as option 1, the mapping selection is based on (N1',N2') instead of (N1,N2).

[0175] As described in Embodiment 2, the existing specifications do not have mappings for 16, 24, and 32 port cases for RI=3 and 4. Therefore, in the aforementioned Options 1 and 2, mappings for 16, 24, and 32 port cases of the extended Rel. 19 type 1SP CB may be newly defined for RI=3 and 4. For N2=1, for example, (N1,N2)=(8,1),(12,1),(16,1), mapping B may be defined / applied. For N2>1, mapping A may be defined / applied.

[0176] According to Embodiment 3, even when a Rel. 19 type 1SP CB for an existing number of ports is configured together with a Rel. 18 SD NES scheme, the UE will provide an appropriate i 1.3 It is possible to determine this.

[0177] <Supplement> <<Notification of Information to UE>> In the embodiments described above, notification of any information from the Network (NW) (e.g., Base Station (BS)) to the UE (in other words, reception of any information from the BS at the UE) may be performed using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE, RRC messages, LTE positioning protocol (LPP) messages), specific signals / channels (e.g., DCI, PDCCH, PDSCH, reference signals), or a combination thereof.

[0178] When the above notification is made by a MAC CE, the MAC CE may be identified by the inclusion of a new Logical Channel ID (LCID) not defined in existing standards in the MAC subheader. The MAC CE may be an extension of an existing MAC CE. For example, the MAC CE may introduce a new octet into an existing MAC CE.

[0179] If the above notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble the Cyclic Redundancy Check (CRC) bits assigned to the DCI, or the format of the DCI. The specific field may be an existing DCI field or a new DCI field. The RNTI may be an existing RNTI or a new RNTI. The format of the DCI may be an existing DCI format or a new DCI format.

[0180] Furthermore, notification of any information to the UE in the above-described embodiment may be periodic, semi-persistent (triggered by the UE or gNB), or aperiodic (triggered by the UE or gNB).

[0181] In the embodiments described above, the UE may receive information from the NW of at least one of the following QCL rules: ◆ QCL Type A ◆ QCL Type B ◆ QCL Type C ◆ QCL Type D

[0182] In the embodiments described above, the QCL source RS for each QCL type may be at least one of the following RSs: ◆SSB ◆CSI-RS with / without repetition ◆TRS ◆DMRS for PDCCH / PDSCH

[0183] In the embodiments described above, information from the network may be set / instructed by the following methods: ◆ Common to multiple UEs, or individual to a UE ◆ Cell-specific, or common to multiple cells ◆ Per UE / Per CC / Per BWP / Per band / Per cell / Per cell group (CG)

[0184] <<Notification of Information from UE>> Notification of any information from the UE to the NW in the embodiments described above (in other words, transmission / reporting of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE, RRC messages, LPP messages), specific signals / channels (e.g., UCI, PUCCH, PUSCH, PRACH, reference signals), or a combination thereof.

[0185] When the above notification is made by a MAC CE, the MAC CE may be identified by the inclusion of a new LCID not specified in existing standards in the MAC subheader. The MAC CE may be an extension of an existing MAC CE. For example, the MAC CE may introduce a new octet into an existing MAC CE.

[0186] If the above notice is made by the UCI, the notice may be transmitted using PUCCH or PUSCH.

[0187] Furthermore, the notification of any information from the UE in the above-described embodiments may be periodic, semi-persistent (triggered by the UE or gNB), or aperiodic (triggered by the UE or gNB).

[0188] <<Regarding the application of each embodiment>> In UE / BS, specific (one or more) processes / operations / controls / assumptions / information for at least one of the embodiments described above may be applied (or used) if any or more of the following conditions are met: ◆ A higher-layer parameter indicating the specific process / operation / control / assumption / information is set; ◆ The specific process / operation / control / assumption / information is determined based on the relevant higher-layer parameter; ◆ The specific process / operation / control / assumption / information is instructed / specified / activated / triggered by MAC CE / DCI / UCI / Resource / Channel / RS; ◆ A specific UE capability indicating (or related to) the specific process / operation / control / assumption / information is reported or supported; ◆ The application of the specific process / operation / control / assumption / information is determined based on specific conditions.

[0189] The above-mentioned specific UE capabilities may represent at least one of the following: ◆ Supporting the above-mentioned specific processing / operation / control / assumption / information; ◆ Capabilities of each embodiment; ◆ Capabilities of each option in each embodiment, or the capabilities of combinations of multiple options in each embodiment; ◆ Capabilities of each choice in each embodiment, or the capabilities of combinations of multiple choices in each embodiment; ◆ Supporting the [Rel. 19] Type 1 SP codebook and the [Rel. 18] NES [SD Type 1]; ◆ Supporting the [Rel. 19] Type 1 SP codebook and the [Rel. 18] NES types other than SD Type 1. The types other than SD Type 1 may include, for example, SD Type 2 or PD; ◆ Capabilities that are repurposed / inherited from the capabilities for the [Rel. 19] Type 1 SP codebook with respect to two UE capabilities of the [Rel. 18] Timeline for NES using more than 32 (48 / 64 / 128) CSI-RS ports. ◆Regarding two UE capabilities for the timeline for [Rel. 18] NES that use more than 32 (48 / 64 / 128) CSI-RS ports, these are capabilities separate from those for the [Rel. 19] Type 1SP codebook.

[0190] Furthermore, the above-mentioned specific UE capability may be a capability that applies across all frequencies (commonly regardless of frequency), a capability per frequency (e.g., one or a combination thereof, such as cell, band, band combination, BWP, 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).

[0191] Furthermore, the specific UE capabilities described above may be capabilities that apply across all duplexing schemes (common to all duplexing schemes regardless of the duplexing scheme), or they may be capabilities specific to each duplexing scheme (e.g., Time Division Duplex (TDD), Frequency Division Duplex (FDD)).

[0192] If the above conditions are not met, UE / BS may follow the behavior specified in existing 3GPP releases.

[0193] Information regarding whether one or more of the above embodiments / options / choices / examples apply / are used, or which of the above embodiments / options / choices / examples apply / are used, may be based on several of the following methods: ◆ The information is set by one or more higher layer parameters / RRC IEs. ◆ The information is determined by one or more relevant higher layer parameters / RRC IEs. ◆ The information is indicated by MAC CE / DCI. ◆ The information is determined based on one or more UE capabilities. ◆ The information is described / defined in the specification. ◆ The information is based on conditions described / defined in the specification. ◆ The information is determined by a combination of several of the above methods. For example, the information is determined by the setting / indication of higher layer parameters / MAC CE / DCIs and reported by UE capabilities.

[0194] The above multiple embodiments / options / choices may be combined into a single embodiment / option / choice.

[0195] In the embodiments described above, the measured RS may be the QCL source RS in an active TCI state / indicated / unified TCI state.

[0196] (Note) The following inventions are added with respect to embodiments of the present disclosure. <Note 1> A terminal comprising: a receiving unit that receives settings for channel status information (CSI) reporting using an extended codebook for more than 32 ports based on a Type 1 single-panel codebook; and a control unit that controls the transmission of index reporting in the extended codebook, wherein the index is based on a portion of first information relating the index, a two-dimensional antenna setting, and an oversampling factor with respect to the Type 1 single-panel codebook, or on second information relating the index and the oversampling factor with respect to the extended codebook. <Note 2> The terminal according to Note 1, wherein when the receiving unit receives a port subset instruction, the control unit determines the association between the index and the oversampling factor based on the two-dimensional antenna setting. <Note 3> The terminal according to Note 1 or Note 2, wherein when the receiving unit receives a port subset instruction, the control unit determines the association between the index and the oversampling factor based on a value obtained by changing the two-dimensional antenna setting according to the port subset instruction. <Note 4> When the extended codebook uses 32 ports or less, the control unit determines the index based on the second information, as described in any of Notes 1 to 3. <Note A> A base station having: a transmission unit that transmits a channel status information (CSI) reporting setting for an extended codebook for more than 32 ports based on a type 1 single panel codebook; and a control unit that controls the reception of the index report in the extended codebook based on the setting, wherein the index is based on a part of first information relating the index, a two-dimensional antenna setting, and an oversampling factor to the type 1 single panel codebook, or on second information relating the index and the oversampling factor to the extended codebook. <Supplement> The terminal in Notes 1 to 4 may be a user terminal 20.The receiving / transmitting unit in Appendix 1 to Appendix 4 may be a transmitting / receiving unit 220. The control unit in Appendix 1 to Appendix 4 may be a control unit 210. The base station in Appendix A may be a base station 10. The receiving / transmitting unit in Appendix A may be a transmitting / receiving unit 120. The control unit in Appendix A may be a control unit 110.

[0197] (Wireless Communication System) The configuration of a wireless communication system according to one embodiment of this disclosure will be described below. In this wireless communication system, communication is performed using any of the wireless communication methods according to the above embodiments of this disclosure, or a combination thereof.

[0198] Figure 12 shows an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 (which may also be simply called system 1) may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc., as specified by the Third Generation Partnership Project (3GPP).

[0199] Furthermore, the wireless communication system 1 may support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0200] In EN-DC, the LTE (E-UTRA) base station (eNB) is the Master Node (MN), and the NR base station (gNB) is the Secondary Node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0201] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity where both MN and SN are NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0202] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) located within the macrocell C1 that form a small cell C2 that is narrower than the macrocell C1. User terminals 20 may be located within at least one cell. The arrangement, number, shape, size, etc., of each cell and user terminal 20 are not limited to the configuration shown in the figure. Hereinafter, when base stations 11 and 12 are not distinguished, they will be collectively referred to as base station 10.

[0203] The wireless communication system 1 may utilize Multi Input Multi Output (MIMO). For example, one cell may be formed by one antenna / base station 10, or by multiple antennas / base stations 10. One [virtual] cell (which may be called a supercell, for example) may be composed of multiple [virtual] cells (which may be called subcells, for example). A supercell may correspond to a cell with a fixed physical range, and a subcell may correspond to a cell whose physical range fluctuates quasi-statically / dynamically. In this case, the wireless communication system 1 may be called a cell-free system.

[0204] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of Carrier Aggregation (CA) using multiple Component Carriers (CC) and Dual Connectivity (DC).

[0205] Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). A macrocell C1 may be included in FR1, and a small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz. Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may be in a frequency band higher than FR2.

[0206] Furthermore, the user terminal 20 may communicate in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0207] Multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with Common Public Radio Interface (CPRI), X2 / Xn interface, etc.) or wireless (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11, which is the upstream station, may be called an Integrated Access Backhaul (IAB) donor, and base station 12, which is the relay station, may be called an IAB node.

[0208] Base station 10 may be connected to the core network 30 via other base stations 10 or directly. The core network 30 may include at least one of the following: Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0209] The core network 30 may include network functions (NF) such as User Plane Function (UPF), Access and Mobility Management Function (AMF), Session Management Function (SMF), Unified Data Management (UDM), Application Function (AF), Data Network (DN), Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). Multiple functions may be provided by a single network node. Furthermore, communication with an external network (e.g., the Internet) may occur via the DN.

[0210] The user terminal 20 may be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0211] In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM)-based wireless access scheme may be used. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-OFDM), etc., may be used in at least one of the downlink (DL) and uplink (UL).

[0212] The wireless access method may also be called a waveform. In wireless communication system 1, other wireless access methods (for example, other single-carrier transmission methods, other multi-carrier transmission methods) may be used for the UL and DL wireless access methods.

[0213] In the wireless communication system 1, a Physical Downlink Shared Channel (PDSCH), a Broadcast Channel (PBCH), or a Physical Downlink Control Channel (PDCCH) may be used as the downlink channel, which is shared by each user terminal 20.

[0214] Furthermore, in the wireless communication system 1, the uplink channel may include a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Physical Random Access Channel (PRACH), or the like, all of which are shared by each user terminal 20.

[0215] User data, higher-layer control information, and System Information Blocks (SIBs) are transmitted via PDSCH. User data and higher-layer control information may also be transmitted via PUSCH. Furthermore, Master Information Blocks (MIBs) may be transmitted via PBCH.

[0216] Lower-layer control information may be transmitted by PDCCH. The lower-layer control information may include, for example, Downlink Control Information (DCI) which includes scheduling information for at least one of PDSCH and PUSCH.

[0217] Furthermore, the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc., and the DCI that schedules PUSCH may be called UL grant, UL DCI, etc. Furthermore, PDSCH may be read as DL data, and PUSCH may be read as UL data.

[0218] PDCCH detection may utilize a Control Resource Set (CORESET) and a search space. A CORESET corresponds to the resources used to search for DCIs. A search space corresponds to the search area and search method for PDCCH candidates. A single CORESET may be associated with one or more search spaces. A UE may monitor CORESETs associated with a given search space based on the search space configuration.

[0219] A single search space may correspond to one or more PDCCH candidates corresponding to aggregation levels. One or more search spaces may be referred to as a search space set. In this disclosure, "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," and "CORESET configuration" may be interpreted interchangeably.

[0220] PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgment information (for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). PRACH may transmit a random access preamble for establishing a connection with the cell.

[0221] In this disclosure, downlinks, uplinks, etc., may be expressed without the prefix "link." Also, the prefix "physical" may be omitted from the names of various channels.

[0222] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc., may be transmitted. In the wireless communication system 1, the DL-RS may include a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc.

[0223] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS / PBCH block, SS Block (SSB), etc. Note that SS, SSB, etc. may also be called reference signals.

[0224] Furthermore, in the wireless communication system 1, the uplink reference signal (UL-RS) may include a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. The DMRS may also be called a user-specific reference signal (UE-specific Reference Signal).

[0225] (Base Station) Figure 13 shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission line interface 140. Note that one or more of the control unit 110, the transmitting / receiving unit 120, the transmitting / receiving antenna 130, and the transmission line interface 140 may be provided.

[0226] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

[0227] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, control circuit, etc., as described based on common understanding in the technical field related to this disclosure.

[0228] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc., using the transmitting / receiving unit 120, transmitting / receiving antenna 130, and transmission path interface 140. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transmitting / receiving unit 120. The control unit 110 may also perform call processing of communication channels (setting, releasing, etc.), status management of the base station 10, management of wireless resources, etc.

[0229] The transmitting / receiving unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmitting / receiving unit 120 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0230] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 1211 and an RF unit 122. The receiving unit may consist of a receiving processing unit 1212, an RF unit 122 and a measuring unit 123.

[0231] The transmitting and receiving antenna 130 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0232] The transmitting / receiving unit 120 may transmit the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 may also receive the uplink channel, uplink reference signal, etc.

[0233] The transmitting / receiving unit 120 may use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like to form at least one of the transmitting beam and the receiving beam.

[0234] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform processing on data and control information acquired from the control unit 110, for example, at the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (e.g., RLC retransmission control), and the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), to generate a bit sequence to be transmitted.

[0235] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, discrete Fourier transform (DFT) processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0236] The transmitting / receiving unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 130.

[0237] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc., on the radio frequency band signal received by the transmitting / receiving antenna 130.

[0238] The transmitting / receiving unit 120 (receiving processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

[0239] The transmitting / receiving unit 120 (measurement unit 123) may perform measurements related to the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may also measure received power (e.g., Reference Signal Received Power (RSRP)), reception quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0240] The transmission path interface 140 may send and receive signals (backhaul signaling) with devices included in the core network 30 (e.g., network nodes that provide NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0241] In this disclosure, the transmitting and receiving units of the base station 10 may consist of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0242] The base station 10 may be separated into three elements: a Radio Unit (RU), a Distributed Unit (DU), and a Central Unit (CU). For example, the RU may implement RF processing (digital beamforming, digital-to-analog conversion, analog beamforming, etc.) and lower-level physical layer functions (precoding, IFFT, FFT, etc.). The DU may implement higher-level physical layer functions (coding to resource element mapping, etc.), MAC layer functions, and RLC layer functions. The CU may implement PDCP layer, Service Data Adaptation Protocol (SDAP) layer, and RRC layer functions.

[0243] In this disclosure, base station 10 may include a single device that implements all the functions of RU, DU, and CU, or it may include multiple devices that each implement some of the functions of RU, DU, and CU and are connected to each other. In this disclosure, base station 10 may be interpreted as RU / DU / CU.

[0244] (User Terminal) Figure 14 shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Note that one or more of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0245] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

[0246] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., as described based on common understanding in the technical field related to this disclosure.

[0247] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc., using the transmitting / receiving unit 220 and the transmitting / receiving antenna 230. The control unit 210 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transmitting / receiving unit 220.

[0248] The transmitting / receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting / receiving unit 220 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0249] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may consist of a receiving processing unit 2212, an RF unit 222 and a measuring unit 223.

[0250] The transmitting and receiving antenna 230 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0251] The transmitting / receiving unit 220 may receive the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 220 may also transmit the uplink channel, uplink reference signal, etc.

[0252] The transmitting / receiving unit 220 may use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like to form at least one of the transmitting beam and the receiving beam.

[0253] The transmitting / receiving unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc., on data and control information acquired from the control unit 210 to generate a bit sequence to be transmitted.

[0254] The transmitting / receiving unit 220 (transmission processing unit 2211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0255] Whether or not to apply DFT processing may be based on the transform precoding settings. The transmitting / receiving unit 220 (transmission processing unit 2211) may perform DFT processing as part of the transmission process to transmit a channel (for example, PUSCH) using a DFT-s-OFDM waveform if transform precoding is enabled for that channel, or it may not perform DFT processing as part of the transmission process if transform precoding is not enabled for that channel.

[0256] The transmitting / receiving unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 230.

[0257] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc., on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0258] The transmitting / receiving unit 220 (receiving processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

[0259] The transmitting / receiving unit 220 (measuring unit 223) may perform measurements related to the received signal. For example, the measuring unit 223 may perform RRM measurement, CSI measurement, etc., based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0260] The measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources. Channel measurement resources may be, for example, Non Zero Power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on interference measurement resources. Interference measurement resources may be at least one of the following: NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc. CSI-IM may also be called CSI-Interference Management (IM), and may be interpreted interchangeably with Zero Power (ZP) CSI-RS. In this disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc., may be interpreted interchangeably.

[0261] In this disclosure, the transmitting unit and receiving unit of the user terminal 20 may be composed of at least one of a transmitting / receiving unit 220 and a transmitting / receiving antenna 230.

[0262] (Hardware Configuration) The block diagram used in the description of the above embodiment shows functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may also be realized by combining the above one device or the above multiple devices with software.

[0263] Here, functions include, but are not limited to, judgment, decision, determination, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission may be called a transmitting unit or transmitter. In all cases, as mentioned above, the method of implementation is not particularly limited.

[0264] For example, a base station, user terminal, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 15 is a diagram showing an example of the hardware configuration of a base station and user terminal according to one embodiment. The base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0265] In this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0266] For example, although only one processor 1001 is shown in the diagram, there may be multiple processors. Furthermore, the processing may be performed by one processor, or it may be performed by two or more processors simultaneously, sequentially, or by other means. Note that the processor 1001 may be implemented using one or more chips.

[0267] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as the processor 1001 and memory 1002, which allows the processor 1001 to perform calculations and control communication via the communication device 1004, or control at least one of reading and writing data in the memory 1002 and storage 1003.

[0268] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may be composed of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, at least a part of the control unit 110 (210) and the transmitting / receiving unit 120 (220) described above may be implemented by the processor 1001.

[0269] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes accordingly. The program used is one that causes the computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be implemented similarly.

[0270] The memory 1002 is a computer-readable recording medium and may consist of at least one of the following: Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be called a register, cache, or main memory. The memory 1002 can store executable programs (program code), software modules, etc., for carrying out a wireless communication method according to one embodiment of the present disclosure.

[0271] The storage 1003 is a computer-readable recording medium and may consist of at least one of the following: a flexible disk, a floppy disk, a magneto-optical disk (e.g., a Compact Disk (Compact Disc ROM (CD-ROM)), a Digital Use Disk, a Blu-ray (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. The storage 1003 may also be called an auxiliary storage device.

[0272] The communication device 1004 is hardware (transmitting / receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, duplexer, filter, frequency synthesizer, etc., in order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitting / receiving unit 120 (220), transmitting / receiving antenna 130 (230), etc., may be implemented by the communication device 1004. The transmitting / receiving unit 120 (220) may be implemented with physically or logically separated transmitting unit 120a (220a) and receiving unit 120b (220b).

[0273] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, light-emitting diode (LED) lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0274] Furthermore, each device, such as the processor 1001 and memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0275] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and some or all of each functional block may be implemented using such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0276] Furthermore, devices included in the core network 30 (for example, network nodes that provide NF) may also be implemented using the functional block / hardware configuration described above.

[0277] (Variations) Terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol and signal (signal or signaling) may be used interchangeably. Also, a signal may be a message. A reference signal may be abbreviated as RS and may be called a pilot, pilot signal, etc., depending on the applicable standard. Also, a component carrier (CC) may be called a cell, frequency carrier, carrier frequency, etc.

[0278] A wireless frame may consist of one or more periods (frames) in the time domain. Each of these periods (frames) constituting a wireless frame may be called a subframe. Furthermore, a subframe may consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0279] Here, the neurology may be communication parameters applied to at least one of the transmission and reception of a signal or channel. The neurology may be, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, and specific windowing processes performed by the transceiver in the time domain.

[0280] A slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols or Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols). Alternatively, a slot may be a time unit based on neurology.

[0281] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. Minislots may also be called subslots. Minislots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using minislots may be called a PDSCH (PUSCH) mapping type B.

[0282] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Wireless frames, subframes, slots, minislots, and symbols may each be referred to by different names. Furthermore, the units of time such as frames, subframes, slots, minislots, and symbols in this disclosure may be interpreted as interchangeable.

[0283] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, and one slot or one mini-slot may be called a TTI. In other words, at least one of a subframe and a TTI may be a subframe in existing LTE (1 ms), a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing a TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0284] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, the base station schedules each user terminal to allocate wireless resources (such as the frequency bandwidth and transmission power available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0285] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the actual time interval (e.g., number of symbols) in which the transport block, code block, code word, etc. are mapped may be shorter than the TTI.

[0286] Furthermore, if one slot or one mini-slot is referred to as a TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit for scheduling. In addition, the number of slots (number of mini-slots) that constitute this minimum time unit for scheduling may be controlled.

[0287] A TTI with a time length of 1 ms may be called a normal TTI, long TTI, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini slot, sub slot, slot, etc.

[0288] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0289] A Resource Block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0290] Furthermore, an RB may contain one or more symbols in the time domain and may have the length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc., may each consist of one or more resource blocks.

[0291] One or more RBs may also be called Physical RBs (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0292] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0293] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a given neurology in a given carrier. These common RBs may be identified by an index of the RBs relative to a common reference point of the carrier. The PRBs may be defined and numbered within a given BWP.

[0294] A BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL). One or more BWPs may be configured within a single carrier for a UE.

[0295] At least one of the configured BWPs may be active, and the UE does not need to assume that it will transmit or receive a predetermined signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0296] The structures of wireless frames, subframes, slots, minislots, and symbols described above are merely examples. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within the TTI can be varied in various ways.

[0297] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or corresponding other information. For example, wireless resources may be indicated by a predetermined index.

[0298] The names used for parameters and other elements in this disclosure are not restrictive in any way. Furthermore, mathematical formulas and other elements using these parameters may differ from those expressly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0299] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0300] Furthermore, information, signals, etc., can be output from upper layers to lower layers and from lower layers to upper layers, or to at least one of the two. Information, signals, etc., may also be input and output via multiple network nodes.

[0301] Input and output information and signals may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information and signals may be overwritten, updated, or appended to. Output information and signals may be deleted. Input information and signals may be transmitted to other devices.

[0302] Any information described in this disclosure (e.g., variables, constants, parameters) may be communicated from any first device (e.g., UE / base station) to any second device (e.g., base station / UE) that indicates / specifies (or relates to) the value of such any information, even if not specifically stated in the embodiments described above.

[0303] Information notification is not limited to the embodiments described herein and may be carried out by other means. For example, information notification in this disclosure may be carried out by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0304] Physical layer signaling may also be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. RRC signaling may also be called RRC messages, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc. MAC signaling may also be communicated using, for example, MAC Control Elements (CEs).

[0305] Furthermore, notification of the specified information (for example, notification that "X is the case") is not limited to explicit notification, but may also be made implicitly (for example, by not notifying the specified information or by notifying other information).

[0306] The determination may be made by a value represented by one bit (0 or 1), by a boolean value represented as true or false, or by a numerical comparison (for example, a comparison with a predetermined value).

[0307] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0308] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0309] The terms “system” and “network” as used in this disclosure may be used interchangeably. “Network” may also mean the equipment included in the network (e.g., base stations).

[0310] In this disclosure, terms such as “precoding,” “precoder,” “weight (precoding weight),” “quasi-co-location (QCL),” “transmission configuration indication state (TCI state),” “spatial relation,” “spatial domain filter,” “transmit power,” “phase rotation,” “antenna port,” “layer,” “number of layers,” “rank,” “resource,” “resource set,” “beam,” “beam width,” “beam angle,” “antenna,” “antenna element,” “panel,” “UE panel,” “transmitting entity,” and “receiving entity” may be used interchangeably.

[0311] In this disclosure, "antenna port" may be interpreted interchangeably with "antenna port for any signal / channel" (e.g., a Demodulation Reference Signal (DMRS) port). In this disclosure, "resource" may be interpreted interchangeably with "resource for any signal / channel" (e.g., a reference signal resource, an SRS resource, etc.). Resources may include time / frequency / code / spatial / power resources. Furthermore, a spatial domain transmit filter may include at least one of a spatial domain transmit filter and a spatial domain receive filter.

[0312] The above group may include, for example, at least one of the following: a spatial relationship group, a code division multiplexing (CDM) group, a reference signal (RS) group, a control resource set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, or a panel group.

[0313] Furthermore, in this disclosure, terms such as beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, Codeword (CW), Transport Block (TB), and RS may be interpreted interchangeably.

[0314] Furthermore, in this disclosure, TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc., may be interpreted interchangeably.

[0315] Furthermore, in this disclosure, terms such as "QCL," "QCL assumption," "QCL relationship," "QCL type information," "QCL property / properties," "specific QCL type (e.g., Type A, Type D) properties," and "specific QCL type (e.g., Type A, Type D)" may be interpreted interchangeably.

[0316] In this disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interpreted interchangeably. In this disclosure, terms such as sequence, list, set, group, cluster, subset may be interpreted interchangeably.

[0317] Furthermore, the spatial relationship information Identifier (ID) (TCI state ID) and spatial relationship information (TCI state) may be interpreted as mutually exclusive. "Spatial relationship information (TCI state)" may be interpreted as mutually exclusive as "a set of spatial relationship information (TCI state)," "one or more pieces of spatial relationship information," etc. TCI state and TCI may be interpreted as mutually exclusive. Spatial relationship information and spatial relationship may be interpreted as mutually exclusive.

[0318] In this disclosure, terms such as “Base Station (BS),” “wireless base station,” “fixed station,” “NodeB,” “eNB (eNodeB),” “gNB (gNodeB),” “access point,” “Transmission Point (TP),” “Reception Point (RP),” “Transmission / Reception Point (TRP),” “panel,” “cell,” “sector,” “cell group,” “carrier,” and “component carrier” may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0319] A base station may house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station may be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0320] In this disclosure, the transmission of information by a base station to a terminal may be interpreted as the base station instructing the terminal to perform a control / operation based on said information.

[0321] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0322] A mobile station may also be called a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate term.

[0323] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may also be a device mounted on a moving object, the moving object itself, etc.

[0324] The term "mobile object" refers to any movable object, regardless of its speed, and naturally includes cases where the mobile object is stationary. Examples of such mobile objects include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and items carried on them. Furthermore, such mobile objects may be autonomously driven objects operating based on operational commands.

[0325] The mobile entity may be a vehicle (e.g., a car, an airplane), an unmanned mobile entity (e.g., a drone, an autonomous vehicle), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0326] FIG. 16 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, a pneumatic 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.

[0327] The drive unit 41 is constituted by, for example, at least one of an engine, a motor, and a hybrid of an engine and a motor. The steering unit 42 includes at least a steering wheel (also called a steering handle), and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on an operation of the steering wheel operated by a user.

[0328] The electronic control unit 49 is constituted by a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input / output (Input / Output (IO)) 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 may be called an Electronic Control Unit (ECU).

[0329] Signals from various sensors 50 - 58 include a current signal from the current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 acquired by the rotation speed sensor 51, a pneumatic pressure signal of the front wheels 46 / rear wheels 47 acquired by the pneumatic pressure sensor 52, a vehicle speed signal acquired by the vehicle speed sensor 53, an acceleration signal acquired by the acceleration sensor 54, a depression amount signal of the accelerator pedal 43 acquired by the accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 acquired by the brake pedal sensor 56, an operation signal of the shift lever 45 acquired by the shift lever sensor 57, a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 58, and the like.

[0330] The information service unit 59 is composed of various devices for providing (outputting) various types of information such as driving information, traffic information, and entertainment information, such as a car navigation system, an audio system, a speaker, a display, a television, and a radio, and one or more ECUs for controlling these devices. The information service unit 59 uses the information acquired from an external device via a communication module 60 or the like to provide various types of information / services (e.g., multimedia information / multimedia services) to the passengers of the vehicle 40.

[0331] The information service unit 59 may include an input device for receiving external input (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.), or may include an output device for performing external output (e.g., a display, a speaker, an LED lamp, a touch panel, etc.).

[0332] The driving support system unit 64 is composed of various devices for providing functions for preventing accidents or reducing the driving load of the driver, such as a millimeter-wave radar, Light Detection and Ranging (LiDAR), a camera, a positioning locator (e.g., Global Navigation Satellite System (GNSS), etc.), map information (e.g., High Definition (HD) map, Autonomous Vehicle (AV) map, etc.), a gyro system (e.g., Inertial Measurement Unit (IMU), Inertial Navigation System (INS), etc.), an Artificial Intelligence (AI) chip, an AI processor, and one or more ECUs for controlling these devices. In addition, the driving support system unit 64 transmits and receives various types of information via the communication module 60 to realize a driving support function or an autonomous driving function.

[0333] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 sends and receives data (information) via the communication port 63 to the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58 provided in the vehicle 40.

[0334] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Alternatively, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 (it may function as at least one of the base station 10 and the user terminal 20).

[0335] The communication module 60 may transmit at least one of the following to an external device via wireless communication: signals from the various sensors 50-58 input to the electronic control unit 49, information obtained based on said signals, and information based on input from an external source (user) obtained via the information service unit 59. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc., may also be called input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include the information based on the above input.

[0336] The communication module 60 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 59 installed in the vehicle. The information service unit 59 may also be called an output unit, which outputs information (for example, it outputs information to devices such as displays and speakers based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 60).

[0337] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, various sensors 50-58, etc., which are provided in the vehicle 40.

[0338] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may have the functions of the base station 10 described above. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, uplink channel, downlink channel, etc., may be interpreted as sidelink channel.

[0339] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station 10 may be configured to have the same functions as the user terminal 20 described above.

[0340] In this disclosure, operations performed by a base station may, in some cases, be performed by its upper node. In a network including one or more network nodes having base stations, it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME), a Serving Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0341] Each aspect / embodiment described in this disclosure may be used individually, in combination, or switched between as needed during execution. Furthermore, the processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described in this disclosure may be rearranged in order, provided they are consistent. For example, the methods described in this disclosure present various step elements using exemplary order and are not limited to the specific order presented.

[0342] Each aspect / embodiment described in this disclosure is Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (where x is, for example, an integer or decimal)), 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®), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi®), IEEE 802.16 (WiMAX®), IEEE 802.20, systems utilizing Ultra-WideBand (UWB), Bluetooth®, or other appropriate wireless communication methods, and next-generation systems extended, modified, created, or defined based thereon may also be applied. Furthermore, multiple systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).

[0343] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0344] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, the references to the first and second elements do not imply that only two elements may be employed or that the first element must precede the second element in any way.

[0345] The term “determining” as used in this disclosure may encompass a wide variety of actions. For example, “determining” may be considered to mean judging, calculating, computing, processing, deriving, investigating, looking up, searching, or inquiring (e.g., searching in tables, databases, or other data structures), ascertaining, etc.

[0346] Furthermore, "judgment (decision)" may be considered as "judging (deciding)" things like receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory).

[0347] Furthermore, “judgment (decision)” may be considered as “judgment (decision)” of resolving, selecting, choosing, establishing, comparing, etc. In other words, “judgment (decision)” may be considered as “judgment (decision)” of some action. In this disclosure, “judgment (decision)” may be interpreted as mutually interchangeable with the actions described above.

[0348] Furthermore, in this disclosure, “determine / determining” may be interpreted as “assume / assuming,” “expect / expecting,” or “consider / considering.” In addition, in this disclosure, “not expecting to do…” may be interpreted as “expecting not to do….”

[0349] In this disclosure, "expect" may be rephrased as "be expected." For example, "expect(s) ..." (where "..." may be expressed as a that clause, an infinitive, etc.) may be rephrased as "be expected ..." or "do (the verb without "to" if "..." is an infinitive)." Similarly, "does not expect ..." may be rephrased as "be not expected ..." or "do not (the verb without "to" if "..." is an infinitive)." Furthermore, "An apparatus A is not expected ..." may be rephrased as "An apparatus B other than apparatus A does not expect ... from apparatus A" (for example, if apparatus A is a UE, apparatus B may be a base station).

[0350] The term "maximum transmit power" as used in this disclosure may mean the maximum transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0351] As used in this disclosure, the terms “connected,” “coupled,” and any variations thereof mean any direct or indirect connection or coupling between two or more elements, and may include one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be replaced with “access.”

[0352] In this disclosure, when two elements are connected, they can be considered to be "connected" or "coupled" to each other using one or more wires, cables, printed electrical connections, etc., and, in some non-exclusive and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0353] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0354] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0355] In this disclosure, if articles are added by translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0356] In this disclosure, terms such as "less than or equal to," "less than," "greater than or equal to," "more than," and "equal to" may be interpreted interchangeably. In addition, in this disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "early," "slow," "wide," and "narrow" may be interpreted interchangeably, not limited to the positive, comparative, and superlative degrees. Furthermore, in this disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "early," "slow," "wide," and "narrow" may be interpreted interchangeably, not limited to the positive, comparative, and superlative degrees, by adding "i-th" (where i is any integer) to the expression (for example, "highest" may be interpreted interchangeably as "i-th highest").

[0357] In this disclosure, "of," "for," "regarding," "related to," and "associated with" may be interpreted as being interchangeable.

[0358] In this disclosure, phrases such as "when A, B", "if A, then B", "B upon A", "B in response to A", "B based on A", "B during / while A", "B before A", "B at (the same time as) / on A", "B after A", "B since A", and "B until A" may be interchangeable. Furthermore, A, B, etc., may be replaced with appropriate expressions such as nouns, gerunds, or regular sentences depending on the context. The time difference between A and B may be approximately zero (immediately after or immediately before). Additionally, a time offset may be applied to the time when A occurs. For example, "A" may be interpreted as "before / after the time offset when A occurs". The time offset (e.g., one or more symbols / slots) may be predetermined or determined by the UE based on notified information.

[0359] In this disclosure, timing, time, duration, time instance, any unit of time (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc., may be interpreted interchangeably.

[0360] Although the invention described herein has been explained in detail above, it will be clear to those skilled in the art that the invention described herein is not limited to the embodiments described herein. The descriptions herein are illustrative and not intended to be restrictive in any way to the invention described herein.

[0361] This application is based on Japanese Patent Application No. 2025-018294, filed on February 6, 2025. All of its contents are included here.

Claims

1. A terminal comprising: a receiving unit that receives settings for channel status information (CSI) reporting using an extended codebook for more than 32 ports based on a Type 1 single-panel codebook; and a control unit that controls the transmission of index reports in the extended codebook, wherein the index is based on a portion of first information relating the index, a two-dimensional antenna setting, and an oversampling factor to the Type 1 single-panel codebook, or on second information relating the index and the oversampling factor to the extended codebook.

2. The terminal according to claim 1, wherein, when the receiving unit receives a port subset instruction, the control unit determines the association between the index and the oversampling factor based on the two-dimensional antenna setting.

3. The terminal according to claim 1, wherein, when the receiving unit receives a port subset instruction, the control unit determines the association between the index and the oversampling factor based on a value obtained by changing the two-dimensional antenna setting according to the port subset instruction.

4. The terminal according to claim 1, wherein if the extended codebook uses 32 or fewer ports, the control unit determines the index based on the second information.

5. A wireless communication method for a terminal, comprising the steps of: receiving a setting for a channel status information (CSI) report using an extended codebook for more than 32 ports based on a Type 1 single-panel codebook; and controlling the transmission of an index report in the extended codebook, wherein the index is based on a portion of first information relating the index, a two-dimensional antenna setting, and an oversampling factor to the Type 1 single-panel codebook, or on second information relating the index and the oversampling factor to the extended codebook.

6. A base station comprising: a transmitting unit that transmits settings for channel status information (CSI) reporting using an extended codebook for more than 32 ports based on a Type 1 single-panel codebook; and a control unit that controls the reception of index reporting in the extended codebook based on the settings, wherein the index is based on a portion of first information relating the index, a two-dimensional antenna setting, and an oversampling factor to the Type 1 single-panel codebook, or on second information relating the index and the oversampling factor to the extended codebook.

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