Terminal, wireless communication method, and base station

Abstract

A terminal according to an aspect of the present disclosure includes: a control unit that controls reporting of terminal capabilities corresponding to a CSI codebook type by using an index corresponding to a candidate of a combination of a plurality of parameters related to resources for channel state information (CSI); and a transmission unit that transmits information on terminal capabilities corresponding to the CSI codebook type.

Description

Technical Field

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

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

[0003] Research is also being conducted on a successor system to LTE (for example, also referred to as the 5th generation mobile communication system (5G), 5G+ (plus), New Radio (NR), 3GPP Rel. 15 and later, etc.).

[0004] Prior Art Documents

[0005] Non-Patent Documents

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

[0007] Problems to be Solved by the Invention

[0008] In Rel. 15 NR, support is provided for reporting UE capability information related to resources / ports (e.g., CSI codebooks) of reference signals (e.g., CSI-RS) for channel state information (CSI) from the UE to the network.

[0009] In a future wireless communication system (after Rel. 16), it is envisioned that in addition to information related to the number of CSI-RS resources / ports (e.g., triplet) per band, a UE will report, as UE capability information, information related to the number of CSI-RS resources / ports for each combination of multiple bands (band combination (BC)). In addition, in a future wireless communication system, an additional CSI codebook type is also considered.

[0010] When a UE reports UE capabilities related to the number of CSI-RS resources / ports (e.g., triplet) for each band / each BC / each CSI codebook type, there is a concern about an increase in the overhead of the UE capability information reported by the UE.

[0011] Therefore, it is desired to reduce the overhead of the UE capability information reported from the UE, but there has not been sufficient research on how to suppress the increase in this overhead.

[0012] Therefore, one of the objectives of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can suppress an increase in the overhead of the capability information reported by a UE.

[0013] Means for Solving the Problem

[0014] A terminal according to one aspect of the present disclosure includes: a control unit that controls the reporting of terminal capabilities corresponding to a CSI codebook type by using an index corresponding to a combination of multiple parameters related to channel state information (CSI) resources; and a transmission unit that transmits information on the terminal capabilities corresponding to the CSI codebook type.

[0015] Effects of the Invention

[0016] According to one aspect of the present disclosure, an increase in the overhead of the capability information reported by a UE can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is an example of communication control between a UE and a network related to UE capability information.

[0018] Figure 2 FIG. is an example of parameters related to CSI-RS reported by a UE for each band.

[0019] Figure 3 FIG. is an example of parameters related to CSI-RS reported by a UE for each BC.

[0020] Figure 4 FIG. is an example of reporting control of UE capability information in a first aspect.

[0021] Figure 5A diagram showing another example of report control of UE capability information indicating the first mode.

[0022] Figure 6 A diagram showing an example of the schematic configuration of a wireless communication system according to an embodiment.

[0023] Figure 7 A diagram showing an example of the configuration of a base station according to an embodiment.

[0024] Figure 8 A diagram showing an example of the configuration of a user terminal according to an embodiment.

[0025] Figure 9 A diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. Detailed Embodiment

[0026] (UE Capability Report

[0027] In a wireless communication system, a terminal (also referred to as a user terminal, User Equipment (UE), etc.) reports the capability information of this terminal to the network (e.g., a base station or an operator) regarding each function used in communication. The UE capability information reported regarding each function is reported in various units such as per UE, per band, etc.

[0028] Based on the capability information reported from the UE, the network controls the wireless communication (e.g., transmission / reception) with each UE. On the other hand, even if the UE reports UE capability information that is not used in this wireless communication system (e.g., UE capability information for a band for which there is no specification, etc.) to the network, the network cannot utilize the reported UE capability information, so it becomes a situation where useless information is reported.

[0029] Therefore, the network can also notify the UE of information related to the communication conditions (e.g., supported bands, etc.) utilized / supported in this network (or the communication system utilized by the network) before the UE reports the UE capability information of this terminal (refer to Figure 1 ). The UE can also determine the content / value of the UE capability information (e.g., UECapabilityInformation) reported to this network based on the information notified from the network.

[0030] The information notified from the network to the UE can also be referred to as UE capability enquiry / UE capability query (e.g., UECapabilityEnquiry) or UE capability request filter (e.g., UE-CapabilityRequestFilter).

[0031] That is, the network may also notify the UE in advance of information related to the UE capabilities that need to be reported (e.g., parameters, parameter ranges), or information related to the UE capabilities that do not need to be reported (e.g., parameters, parameter ranges).

[0032] UE capability query (e.g., UECapabilityEnquiry) information may also be included in a specific message sent from the network to the UE. The specific message may also be a DL-DCCH-Message. Information for the network to request the UE to filter UE capabilities (e.g., capabilityRequestFilter or UE-CapabilityRequestFilterNR) may also be included in the UE capability query information. Information related to a filter for codebook parameters corresponding to channel state information (CSI) (e.g., CodebookParameterFilter) may also be included in the information for requesting the filtering of UE capabilities.

[0033] For example, the UE may also report information related to CSI reporting as UE capability information.

[0034] (CSI report (CSI report or reporting))

[0035] In Rel.15 NR, a terminal (also referred to as a user terminal, user equipment (UserEquipment (UE)), etc.) generates (also referred to as determines, calculates, estimates, measures, etc.) channel state information (CSI) based on a reference signal (Reference Signal (RS)) (or the resource for the RS), and sends (also referred to as reports, feeds back, etc.) the generated CSI to the network (e.g., a base station). The CSI may be sent to the base station using, for example, an uplink control channel (e.g., Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (e.g., Physical Uplink Shared Channel (PUSCH)).

[0036] The RS used in the generation of CSI can be, for example, at least one of a Channel State Information Reference Signal (CSI-RS), a Synchronization Signal / Broadcast Channel (Synchronization Signal / Physical Broadcast Channel (SS / PBCH)) block, a Synchronization Signal (SS), a DeModulation Reference Signal (DMRS), etc.

[0037] The CSI-RS can also include at least one of a Non Zero Power (NZP) CSI-RS and a CSI-Interference Management (CSI-IM). The SS / PBCH block is a block that includes an SS and a PBCH (and the corresponding DMRS), and can also be referred to as an SS block (SSB), etc. In addition, the SS can also include at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).

[0038] The CSI may also include at least one parameter (CSI parameter) such as a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a CSI-RS Resource Indicator (CRI), an SS / PBCH block resource indicator (SS / PBCH block indicator (SSBRI)), a Layer Indicator (LI), a Rank Indicator (RI), an L1-RSRP (Layer 1 Reference Signal Received Power), an L1-RSRQ (Reference Signal Received Quality), an L1-SINR (Signal-to-Noise and Interference Ratio or Signal to Interference plus Noise Ratio), an L1-SNR (Signal to Noise Ratio), etc.

[0039] The UE may also receive information related to the CSI report (report configuration information) and control the CSI report based on the report configuration information. The report configuration information may also be, for example, the "CSI-ReportConfig" of an Information Element (IE) of Radio Resource Control (RRC). Additionally, in the present disclosure, the RRC IE may also be replaced with an RRC parameter, a higher layer parameter, etc.

[0040] The report configuration information (e.g., the "CSI-ReportConfig" of the RRC IE) may also include, for example, at least one of the following.

[0041] · Information related to the type of CSI report (report type information, e.g., the "reportConfigType" of the RRC IE)

[0042] · Information related to one or more quantities of CSI to be reported (one or more CSI parameters) (report quantity information, e.g., the "reportQuantity" of the RRC IE)

[0043] · Information related to the RS resources used in the generation of this quantity (this CSI parameter) (resource information, e.g., "CSI-ResourceConfigId" of the RRC IE)

[0044] · Information related to the frequency domain that is the object of the CSI report (frequency domain information, e.g., "reportFreqConfiguration" of the RRC IE)

[0045] For example, the report type information can also indicate (indicate) a periodic CSI (Periodic CSI (P-CSI)) report, an aperiodic CSI (Aperiodic CSI (A-CSI)) report, or a semi-persistent (semi-persistent, semi-continuous (Semi-Persistent)) CSI report (Semi-Persistent CSI (SP-CSI)) report.

[0046] In addition, the reported quantity information can also specify at least one combination of the above CSI parameters (e.g., CRI, RI, PMI, CQI, LI, L1-RSRP, etc.).

[0047] In addition, the resource information can also be the ID of the RS resources. The RS resources can also include, for example, CSI-RS resources with non-zero power or SSBs, and CSI-IM resources (e.g., CSI-RS resources with zero power).

[0048] The UE uses the received RS to perform channel estimation and estimates the channel matrix H. The UE feeds back an index (PMI) determined based on the estimated channel matrix.

[0049] The PMI can also represent a precoder matrix (also simply referred to as a precoder) that the UE believes is suitable for use in downlink (downlink (DL)) transmission for the UE. Each value of the PMI can also correspond to a precoder matrix. The set of PMI values can also correspond to a set of different precoder matrices referred to as a precoder codebook (also simply referred to as a codebook).

[0050] In the space domain, the CSI report may also include more than one type of CSI. For example, the CSI may also include at least one of a first type (Type 1 CSI) used in the selection of a single beam and a second type (Type 2 CSI) used in the selection of a multi-beam. The single beam may also be replaced by a single layer, and the multi-beam may also be replaced by multiple beams. In addition, it may be that for Type 1 CSI, multi-user multiple input multiple output (MIMO) is not envisaged, and for Type 2 CSI, multi-user MIMO is envisaged.

[0051] The above codebook may also 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.). In addition, Type 1 CSI may also include Type 1 single-panel CSI and Type 1 multi-panel CSI, and may also be specified with different codebooks (Type 1 single-panel codebook, Type 1 multi-panel codebook).

[0052] In this disclosure, Type 1 and Type I may be interchangeable. In this disclosure, Type 2 and Type II may be interchangeable.

[0053] Regarding the type of uplink control information (UCI), it may also include at least one of Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), scheduling request (SR), and CSI. The UCI may be carried either by the PUCCH or by the PUSCH.

[0054] The UE may also report a list of supported CSI-RS resources (e.g., supportedCSI-RS-ResourceList) for each CSI codebook type (or each codebook parameter). For example, the UE reports information related to the maximum number (or maximum value) of transmission ports per resource, the maximum number of resources per band, and the total number of transmission ports per band for each resource (e.g., {maxNumberTxPortsPerResource, maxNumberResourcesPerBand, totalNumberTxPortsPerBand}).

[0055] The maximum number of transmit ports per resource (maxNumberTxPortsPerResource) represents the maximum number of transmit ports in the resource (e.g., the maximum number of transmit ports that can be set simultaneously in a CSI-RS resource). The maximum number of resources per band (maxNumberResourcesPerBand) represents the maximum number of resources in all the CCs (or cells) within the band (e.g., the maximum number of CSI-RS resources that can be set simultaneously across all CCs). The total number of transmit ports per band (totalNumberTxPortsPerBand) represents the total number of transmit ports in all the CCs within the band (e.g., the total number of transmit ports that can be set simultaneously across all CCs). Additionally, a CC corresponds to the CCs included in the band.

[0056] The UE may also report codebook-related codebook parameters (e.g., codebookParameters) as band parameters per band (e.g., Band NR parameters). The codebook parameters may also represent the codebook (or codebook parameters) supported by the UE and the parameters corresponding to the codebook. The codebook parameters may also include at least one of the following parameters (1)-(4) ( Figure 2 ). For example, (1) may be mandatory, and (2)-(4) may be optional.

[0057] (1) Parameters of the type 1 single-panel codebook (type1 singlePanel) supported by the UE

[0058] (2) Parameters of the type 1 multi-panel codebook (type1 multiPanel) supported by the UE

[0059] (3) Parameters of the type 2 codebook (type2) supported by the UE

[0060] (4) Parameters of the type 2 codebook with port selection supported by the UE (type2-PortSelection)

[0061] In each of the parameters (1) to (4), information related to the list of CSI-RS resources supported in each codebook type (supportedCSI-RS-ResourceList) may also be included. In addition, the information related to the list of CSI-RS resources may also include the list of the following parameters described above.

[0062] · Maximum number of transmission ports per resource (maxNumberTxPortsPerResource)

[0063] · Maximum number of resources per band (maxNumberResourcesPerBand)

[0064] · Total number of transmission ports per band (totalNumberTxPortsPerBand)

[0065] The parameters (1)-(4) related to the above-mentioned codebook reported by the UE can also be referred to as FG2-36 / 2-40 / 2-41 / 2-43. The parameters {the first parameter (e.g., maxNumberTxPortsPerResource), the second parameter (e.g., maxNumberResourcesPerBand), the third parameter (e.g., totalNumberTxPortsPerBand)} included in the list of CSI-RS resources can also be referred to as a triplet (e.g., Triplet). The triplet can also be replaced by a combination of the parameters (or, elements) included in the list of CSI-RS resources.

[0066] [Band combination]

[0067] In the case where the UE performs communication by combining multiple bands, it is assumed that CSI-RS is separately set in each band.

[0068] It is also considered the case where a certain UE that supports communication using band combination shares a CSI processing unit (or CSI control unit) between bands. For example, it is considered that a UE that shares a CSI processing unit between bands has the same CSI processing ability within and between bands. The combination of bands can also be referred to as Band Combination (BC).

[0069] Therefore, it is assumed that a UE that supports BC reports the UE capability of the CSI codebook for each band combination in addition to the UE capability of the CSI codebook for each band. For example, it is assumed that a UE that supports BC reports specific parameters for each band combination (BC).

[0070] As a specific parameter (e.g., CA-ParametersNR, or csi-RS-IM-ReceptionForFeedbackPerBandComb), the UE may also report parameters related to the maximum number of CSI-RS resources in the BC (e.g., maxNumberResourcesPerBC, or maxNumberSimultaneousNZP-CSI-RS-ActBWP-AllCC), and the total number of ports (e.g., totalNumberTxPortsPerBC, or totalNumberPortsSimultaneousNZP-CSI-RS-ActBWP-AllCC).

[0071] The parameter related to the maximum number of CSI-RS resources in the BC may also correspond to the maximum number of CSI-RS resources that are simultaneously configured across all CCs in the active BWP. This parameter limits the total number of CSI-RS resources that the NW can configure across all CCs.

[0072] The parameter related to the total number of ports in the BC may also correspond to the total number of ports of the CSI-RS resources that are simultaneously configured across all CCs in the active BWP. This parameter limits the total number of ports that the NW can configure across all CCs.

[0073] On the other hand, in the case of reporting multiple combinations of the maximum number of CS-RS resources (e.g., maxNumberResourcesPerBC) and the total number of ports (e.g., totalNumberTxPortsPerBC) for each BC, there is a concern that a situation may occur where the number of resources / ports set exceeds the UE's capabilities.

[0074] For example, consider a case where the UE has the following UE capabilities (number of ports per resource, number of resources) for band A, band B, and the combination of band A and band B.

[0075] Band A: (8, 6), (16, 2)

[0076] Band B: (8, 6), (16, 2)

[0077] Band A + B: (8, 6), (16, 2)

[0078] According to such UE capabilities, when 8 ports are configured for each resource, the UE supports 6 resources across band A and band B. In addition, when 16 ports are configured for each resource, the UE supports 2 resources across band A and band B.

[0079] Here, it is assumed that as specific parameters related to BC (band region A + band region B) (maxNumberResourcesPerBC, totalNumberTxPortsPerBC), the UE reports the values of (6, 48) and (2, 32) (without reporting the maximum number of transmission ports per resource (maxNumberTxPortsPerResource)).

[0080] In the case where the UE reports (6, 48) and (2, 32) as specific parameters related to BC (here, band region A + B), consider the possibility that the following structure (a total of 48 ports in 3 resources) is set by the network.

[0081] Band region A: 16 ports + 16 ports (2 resources)

[0082] Band region B: 16 ports (1 resource)

[0083] This is because the triple (16, 2, 32) is satisfied for band region A, the triple (16, 2, 32) is satisfied for band region B, and (6, 48) is satisfied for band region A + B (that is, 3 resources are set simultaneously in band region A + B, and the total number of ports is 48 or less). However, there is a concern that such a setting (for example, a setting of 3 resources with 16 ports each resource) may exceed the UE's capability (UEcapability).

[0084] To avoid a setting that exceeds the UE's capability, as a specific parameter, the UE needs to not report (6, 48), but only report (2, 32) (under-reporting).

[0085] Therefore, consider that the UE also reports the maximum number of ports per resource for BC (or for each BC) (for example, maxNumberTxPortsPerResource, or maxNumberTxPortsPerResourceperBC). For example, assume that for BC, the UE reports a triple (the first parameter (for example, maxNumberTxPortsPerResource), the second parameter (for example, maxNumberResourcesPerBC), the third parameter (for example, totalNumberTxPortsPerBC) for each CSI codebook (refer to Figure 3 ). In such a case, there is a concern that the signaling overhead reported by the UE increases.

[0086] In addition, it is envisioned that for a UE in a future wireless communication system (e.g., after Rel. 16), as UE capabilities related to a CSI codebook, in addition to the UE capabilities specified in the existing system (e.g., Rel. 15), new UE capabilities are reported (or new UE capabilities are reported as an alternative). For example, it may be that the UE capabilities specified in the existing system (e.g., Rel. 15 UE cap.) are the following UE capability #1, and the new UE capabilities (e.g., Rel. 16 UE cap.) are at least one of the following UE capabilities #2 - #6.

[0087] <Rel.15 CSI codebook capability (CSI-codebook cap.)>

[0088] UE capability #1: Triplet of Rel. 15 CSI codebook (per band)

[0089] <Rel.16 CSI codebook capability (CSI-codebook cap.)>

[0090] UE capability #2: Triplet of Rel. 15 CSI codebook (per band)

[0091] UE capability #3: Triplet of Rel. 15 CSI codebook (per BC)

[0092] UE capability #4: Triplet of Rel. 16 CSI codebook (per band)

[0093] UE capability #5: Triplet of Rel. 16 CSI codebook (per BC)

[0094] UE capability #6: Linked CSI codebook of Rel. 16 CSI and Rel. 15 CSI

[0095] For example, UE capabilities #1, #2, and #3 may also be reported for each specific codebook type. The specific codebook type may also be at least one of the type 1 single panel (R15 Type 1 single panel) supported in Rel. 15, the type 1 multi panel (R15 Type 1 multi panel) supported in Rel. 15, the type 2 (R15 Type 2) supported in Rel. 15, and the type 2 port selection (R15 type 2 port selection) supported in Rel. 15.

[0096] UE capabilities #4 and #5 can be reported for each codebook type supported in Rel. 16. The codebook types supported in Rel. 16 can also be at least one of the type 2 (R16 type2) supported in Rel. 16 and the type 2 port selection (R16 type 2 port selection) supported in Rel. 16.

[0097] Thus, in a future wireless communication system, when reporting a combination (e.g., a triple) of multiple parameters for each UE capability or each CSI codebook type, the amount of information / data size reported by the UE will be very large. Therefore, there is a concern about a reduction in communication throughput.

[0098] Therefore, the inventors of the present invention have studied a method for suppressing an increase in the overhead of reporting UE capabilities and conceived this embodiment. For example, in one aspect of this embodiment, instead of reporting the values of a combination (triple) of multiple parameters (or elements) for each band / each BC, information (e.g., an index) corresponding to the triple may be reported.

[0099] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The wireless communication methods and each aspect of each embodiment can be applied separately or in combination. In addition, in the present disclosure, "A / B" can be replaced with "at least one of A and B".

[0100] In the following description, a port, a CSI-RS port, and a CSI-RS resource port may be replaced with each other. The triple in the present disclosure may refer to the parameters {first parameter (e.g., maxNumberTxPortsPerResource), second parameter (e.g., maxNumberResourcesPerBand / PerBC), third parameter (e.g., totalNumberTxPortsPerBand / PerBC)} included in the list of CSI-RS resources.

[0101] In the following description, the maximum number of CSI-RS resources (e.g., maxNumberResourcesPerBC) and the maximum number of CSI-RS resources in all CCs / active BWPs (e.g., maxNumberSimultaneousNZP-CSI-RS-ActBWP-AllCC) can also be replaced with each other. The total number of ports (e.g., totalNumberTxPortsPerBC) and the total number of ports of CSI-RS resources in all CCs / active BWPs (e.g., totalNumberPortsSimultaneousNZP-CSI-RS-ActBWP-AllCC) can also be replaced with each other.

[0102] (First method)

[0103] In the first method, the following is described: Control is performed such that, for each band / each BC, instead of reporting the values of each element included in a combination (or triple) of multiple elements separately, information (e.g., index) corresponding to the triple is reported.

[0104] In addition, in the following description, the case of being applied to at least one of the above UE capabilities #2 to UE capabilities #6 is taken as an example for description, but the UE capabilities to which this embodiment can be applied are not limited to this.

[0105] The UE can also perform control such that, using the information corresponding to the triple (or candidate of the triple), reporting of terminal capabilities related to the CSI codebook (e.g., Rel.16 CSI codebook capabilities (CSI-codebook cap.)) is performed. The information corresponding to the candidate of the triple can also be the index of the triple candidate or a list of indices of the triple candidates.

[0106] The UE can report one or more candidates of the triple (or a candidate list including one or more candidates of the triple). Regarding the candidate of the triple (or the candidate list of the triple), the UE can also report it separately from the terminal capabilities related to the CSI codebook (refer to Figure 4 ).

[0107] In addition, the information related to the candidate list of the triple and the information related to the terminal capabilities related to the CSI codebook can also be reported at the same timing (refer to Figure 5 ). In this case, the information related to the candidate list of the triple and the information related to the terminal capabilities related to the CSI codebook can be reported either included in different information elements or included in the same information element.

[0108] Regarding the candidate list of triples (or candidates for each triple), it can also be set as a structure associated with specific indexes respectively, or can be specified by specific indexes respectively. For example, as the candidate list of triples, the UE can report as follows, for example. The reported candidate list of triples (such as the number of candidates for triples, etc.) is not limited to this.

[0109] <Candidate list of triples>

[0110] (x1, y1, z1): Index #1

[0111] (x2, y2, z3): Index #2

[0112] (x3, y3, z3): Index #3

[0113] (x4, y4, z4): Index #4

[0114] (x5, y5, z5): Index #5

[0115] For example, Index #3 of the candidate for a triple refers to the triple (x3, y3, z3).

[0116] The maximum value of the size of the candidate list of triples (or the number of candidates for triples) can be defined by the specification or notified to the UE from the network. The UE controls to report the candidate list of triples within the range not exceeding this maximum value (for example, 20). In addition, the UE can also report a candidate list with a number less than this maximum value.

[0117] The UE can also control the reporting of each UE capability related to the CSI codebook (here, the triples corresponding to each codebook type of UE Capability #2 and #3) based on the reported candidate list of triples. Here, it is assumed that the reported candidate list of triples is the case of (x1, y1, z1), (x2, y2, z3), (x3, y3, z3), (x4, y4, z4), (x5, y5, z5).

[0118] <UE Capability #2: Triples of Rel.15 CSI Codebook (per band)

[0119] · Codebook type #1: Index list = (1, 2, 3, 4, 5)

[0120] · Codebook type #2: Index list = (1, 2, 3)

[0121] · Codebook type #3: Index list = (1)

[0122] · Codebook type #4: Index list = (1)

[0123] <UE能力#3:Rel.15CSI码本的三元组(每个BC)

[0124] Codebook type #1: Index list = (1, 2, 3, 4, 5)

[0125] Codebook type #2: Index list = (1, 2, 3)

[0126] Codebook type #3: Index list = (1)

[0127] Codebook type #4: Index list = (1)

[0128] Alternatively, codebook type #1 may be R15 Type 1 single panel, codebook type #2 may be R15 Type 1 multi panel, codebook type #3 may be R15 Type 2, and codebook type #4 may be R15 Type 2 port selection. In addition, the present invention is not limited thereto.

[0129] Regarding UE capabilities #4, #5, and #6, the UE may also control reporting based on a candidate list of reported triplets (eg, using an index corresponding to the triplets).

[0130] In this way, in each UE capability (or, reporting for each band / each BC), by using an index to report a triplet for each codebook type, it is possible to suppress an increase in the signaling overhead of the UE report.

[0131] For example, when the maximum value of the size of the candidate list of a triple (or the number of candidates of a triple) is 20, the report of the triple corresponding to each codebook type may report an index list of integers 1 to 20. In this case, it is possible to report in 20 bits in each index list (for example, in a bitmap form).

[0132] <Change 1>

[0133] When reporting the UE capability corresponding to each codebook type using the index corresponding to the triplet, the UE may also perform control so as to report consecutive indexes. That is, the indexes included in the index list reported by the UE may also be limited to consecutive indexes.

[0134] When the maximum value of the size of the candidate list of triples (or the number of candidates of triples) is 20, the UE only needs to report the start index (e.g., 20 types (Japanese: "20 通り") (one of 20)) and the length / number of indices (less than 20 types). This can effectively reduce the signaling overhead (e.g., the number of bits) reported by the UE.

[0135] Alternatively, the UE may also control the report to include a continuous index of a specific index (e.g., index #1) when reporting the UE capability corresponding to each codebook type using the index corresponding to the triplet. That is, the indexes included in the index list reported by the UE may also be limited to continuous indexes starting from a specific index.

[0136] When the maximum size of the candidate list of triples (or the number of candidates for triples) is 20 and the specific index is #1, the UE only needs to report the length / index number (1 of 19 types (Japanese: "19 通り")). This can effectively reduce the signaling overhead (e.g., the number of bits) reported by the UE.

[0137] <Change 2>

[0138] In the above description, the case where the UE reports more than one candidate triple (or a candidate list containing more than one candidate triple) is shown, but it is not limited to this. One or more candidate lists of triples may also be defined in the specification. For example, the candidate list of triples (or the candidates of each triple) may also be defined / set by being associated with a specific index respectively. Alternatively, the candidate list of more than one triple may also be notified / set from the network. For example, the network may also use UE capability query (e.g., UECapabilityEnquiry) information to notify / set the candidate list of triples to the UE.

[0139] In this case, since the UE may not report more than one triplet of candidates (or a candidate list including more than one triplet of candidates), the signaling overhead (eg, the number of bits) reported by the UE can be reduced.

[0140] (Second method)

[0141] In the second aspect, a candidate list of triplet (or triplet candidates) used by the UE is described.

[0142] The triplet candidate (or triplet candidate list) may also be controlled to be reported / configured in each specific unit. The specific unit may be at least one of a UE unit, a band unit, and a BC unit.

[0143] <UE单位>

[0144] For example, triplet candidates (or triplet candidate list) may be reported / set for each UE (or in units of UEs).

[0145] For example, in the UE capabilities of NR (NR UE cap.), a candidate list of a set of triples can also be reported for each UE. In this case, a certain UE can also be controlled such that the candidate list of triples is not reported for each band region and each BC (or a common candidate list of triples is reported for multiple band regions / multiple BCs).

[0146] The UE can also use the same candidate list of triples to report: the UE capabilities related to the CSI codebook reported for each band region (e.g., triples), and the UE capabilities related to the CSI codebook reported for each BC (e.g., triples).

[0147] <Band region unit / BC unit>

[0148] The candidates of triples (or the candidate list of triples) can also be reported / set for each band region / each BC (or in band region units / BC units).

[0149] For example, a candidate list of a set of triples can also be reported separately for each band region (e.g., for reporting of each band region) and each BC (e.g., for reporting of each BC). In this case, the UE uses the first candidate list of triples to report the UE capabilities related to the CSI codebook reported for each band region (e.g., triples). On the other hand, the UE can also use the second candidate list of triples to report the UE capabilities related to the CSI codebook reported for each BC (e.g., triples).

[0150] That is, for the UE capabilities reported in band region units, a common candidate list of triples is reported / set, and for the UE capabilities reported in BC units, a common candidate list of triples is reported / set. In this case, the index #X of the candidate list of triples reported for each band region and the index #X of the candidate list of triples reported for each BC can also represent different triples respectively.

[0151] In this way, by adopting a structure in which a candidate list of a set of triples is reported / set separately for each band region and each BC, and for each BC, the reporting of triples can be performed more flexibly.

[0152] Alternatively, the candidate list of triples can also be reported separately for each band region. For example, in the case of reporting the UE capabilities related to the CSI codebook for n band regions separately, it can also be set that n candidate lists of sets of triples are reported / set.

[0153] Alternatively, a candidate list of triples can be reported separately for each BC. For example, in the case of reporting UE capabilities related to the CSI codebook for m BCs respectively, it can also be set that candidate lists of triples for m sets are reported / set.

[0154] Thereby, triples reported for each band / each BC can be set more flexibly.

[0155] <Setting of the triple candidate list>

[0156] Candidates of triples (or a candidate list of triples) can also be selected from specific triples. For example, regarding the candidate list of triples, values of specific triples reported by the UE can also be applied.

[0157] Specific triples can be, for example, UE capability #1 (triples for the Rel.15 CSI codebook (per band)) reported as capabilities related to the Rel.15 CSI codebook (Rel.15 CSI-codebook cap.). For example, triples corresponding to each codebook type reported in UE capability #1 can be used as a candidate list of triples.

[0158] Each codebook type reported in UE capability #1 can be at least one of codebook type #1 (e.g., R15 Type 1 single panel), codebook type #2 (e.g., R15 Type 1 multipanel), codebook type #3 (e.g., R15 Type 2), and codebook type #4 (e.g., R15 type 2 port selection).

[0159] Triples corresponding to each CSI codebook type reported in the triples for the Rel.15 CSI codebook (per band) can also be candidates (or a candidate list of triples) of triples used in the report of capabilities related to the Rel.16 CSI codebook (for Rel.16 CSI-codebook cap.). That is, triples of each CSI codebook type reported in UE capability #1 can also correspond to candidate lists of triples of each CSI codebook type in UE capabilities #2 to #6.

[0160] For example, the list of triples of codebook type #1 (e.g., R15 Type 1 single panel) reported in UE capability #1 (or Rel.15 CSI codebook capability (Rel.15 CSI codebook cap.)) can also correspond to a candidate list of triples of codebook types including at least UE capabilities #2 to #6 (or Rel.16 CSI codebook capability (Rel.16 CSI codebook cap.)).

[0161] Alternatively, among the triples (for each band) of the CSI codebook reported in Rel.15, the triples corresponding to a specific CSI codebook type can also be candidates (or a candidate list of triples) of the triples utilized in the report of the capabilities related to the Rel.16 CSI codebook (Rel.16 CSI codebook capability (Rel.16 CSI - codebook cap.)). That is, the triples of a specific CSI codebook type among the CSI codebook types reported in UE capability #1 can also correspond to the candidate list of triples of each CSI codebook type of UE capabilities #2 to #6.

[0162] For example, the list of triples of codebook type #1 (e.g., R15 Type 1 single panel) reported in UE capability #1 (or Rel.15 CSI codebook capability (Rel.15 CSI codebook cap.)) can also correspond to the candidate list of triples of all codebook types of UE capabilities #2 to #6 (or Rel.16 CSI codebook capability (Rel.16 CSI codebook cap.)).

[0163] In this way, by using the triples actually reported as UE capabilities (e.g., UE capabilities related to codebook types) as candidates of triples (or a candidate list of triples), the UE can thus not report the candidate list of triples. As a result, an increase in the signaling overhead (e.g., the number of bits) reported by the UE can be suppressed.

[0164] (Wireless communication system)

[0165] Hereinafter, the structure of a wireless communication system according to an embodiment of the present disclosure will be described. In this wireless communication system, communication is performed using any one or a combination of the above-described wireless communication methods of the various embodiments of the present disclosure.

[0166] Figure 6It is a diagram showing an example of the schematic structure of a wireless communication system according to an embodiment. The wireless communication system 1 may also be a system that realizes communication by using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the 5th generation mobile communication system New Radio (5G NR), and the like.

[0167] In addition, the wireless communication system 1 may also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple Radio Access Technologies (RATs). MR-DC may also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0168] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the Master Node (MN), and the base station (gNB) of NR is the Secondary Node (SN). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0169] The wireless communication system 1 may also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity where both the MN and the SN are base stations (gNBs) of NR (NR-NR Dual Connectivity (NN-DC))).

[0170] The wireless communication system 1 may also include: a base station 11 that forms a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a - 12c) that is disposed within the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located within at least one cell. The configuration, number, etc. of each cell and the user terminal 20 are not limited to the manner shown in the figure. Hereinafter, without distinguishing between the base stations 11 and 12, they are collectively referred to as the base station 10.

[0171] The user terminal 20 may also be connected to at least one of the multiple base stations 10. The user terminal 20 may also utilize at least one of carrier aggregation (CA) and dual connectivity (DC) that uses multiple component carriers (CCs).

[0172] Each CC may also be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub - 6 GHz), and FR2 may be a frequency band higher than 24 GHz (above - 24 GHz). Additionally, the frequency bands, definitions, etc. of FR1 and FR2 are not limited thereto. For example, FR1 may correspond to a frequency band higher than FR2.

[0173] Furthermore, the user terminal 20 may communicate using at least one of time - division duplex (TDD) and frequency - division duplex (FDD) in each CC.

[0174] The multiple base stations 10 may be connected by wire (e.g., optical fiber based on the Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11, which is equivalent to the upper - level station, may be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12, which is equivalent to a relay station, may be referred to as an IAB node.

[0175] The base station 10 can also be connected to the core network 30 via other base stations 10 or directly. For example, the core network 30 can also include at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), etc.

[0176] The user terminal 20 can also be a terminal that supports at least one of communication methods such as LTE, LTE-A, 5G, etc.

[0177] In the wireless communication system 1, a wireless access method based on Orthogonal Frequency Division Multiplexing (OFDM) can also be used. For example, in at least one of the Downlink (DL) and the Uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. can also be used.

[0178] The wireless access method can also be referred to as a waveform. Additionally, in the wireless communication system 1, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be applied in the wireless access methods of the UL and the DL.

[0179] In the wireless communication system 1, as a downlink channel, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. that are shared among the user terminals 20 can also be used.

[0180] In addition, in the wireless communication system 1, as the uplink channel, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared among the user terminals 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. can also be used.

[0181] User data, high-layer control information, System Information Block (SIB), etc. are transmitted through the PDSCH. User data, high-layer control information, etc. can also be transmitted through the PUSCH. In addition, the Master Information Block (MIB) can be transmitted through the PBCH.

[0182] Low-layer control information can also be transmitted through the PDCCH. The low-layer control information can also include, for example, downlink control information (Downlink Control Information (DCI)), and the downlink control information contains scheduling information of at least one of the PDSCH and the PUSCH.

[0183] In addition, the DCI that schedules the PDSCH can also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH can also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH can also be interpreted as DL data, and the PUSCH can also be interpreted as UL data.

[0184] In the detection of the PDCCH, a control resource set (COntrol REsource SET (CORESET)) and a search space can also be used. The CORESET corresponds to the resource for searching for the DCI. The search space corresponds to the search area and search method for PDCCH candidates (PDCCH candidates). One CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a certain search space based on the search space setting.

[0185] A search space may also correspond to PDCCH candidates that match one or more aggregation levels. One or more search spaces may also be referred to as a set of search spaces. Additionally, in the present disclosure, terms such as "search space", "set of search spaces", "search space configuration", "set of search space configurations", "CORESET", "CORESET configuration", etc. may be used interchangeably.

[0186] Uplink control information (Uplink Control Information (UCI)) including at least one of channel state information (Channel State Information (CSI)), delivery confirmation information (e.g., also referred to as Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (Scheduling Request (SR)) may also be transmitted via PUCCH. A random access preamble for establishing a connection with a cell may also be transmitted via PRACH.

[0187] Additionally, in the present disclosure, the downlink, uplink, etc. may also be expressed without the word "link". Furthermore, it may also be expressed such that the word "Physical" is not included at the beginning of various channels.

[0188] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted.

[0189] The synchronization signal can also be, for example, at least one of the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be referred to as an SS / PBCH block, an SS block (SS Block (SSB)), etc. In addition, SS, SSB, etc. can also be referred to as reference signals.

[0190] In addition, in the wireless communication system 1, as the Uplink Reference Signal (UL-RS), it is also possible to transmit a reference signal for measurement (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. In addition, DMRS can also be referred to as a UE-specific Reference Signal.

[0191] (Base station)

[0192] Figure 7 FIG. is an example showing the structure of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission path interface (transmission line interface) 140. In addition, one or more of the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140 may be provided respectively.

[0193] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it can also be assumed that the base station 10 also has other functional blocks required for wireless communication. A part of the processing of each unit described below may also be omitted.

[0194] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, etc. described based on the common knowledge in the technical field related to the present disclosure.

[0195] The control unit 110 can also control the generation, scheduling (e.g., resource allocation, mapping), etc. of signals. The control unit 110 can also control the transmission and reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 can also generate data, control information, sequence, etc. to be transmitted as signals, and forward them to the transmission and reception unit 120. The control unit 110 can also perform call processing (setting, releasing, etc.) of communication channels, state management of the base station 10, management of radio resources, etc.

[0196] The transmission and reception unit 120 may also include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transmission and reception unit 120 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission and reception circuit, etc. that can be described based on common knowledge in the technical field related to the present disclosure.

[0197] The transmission and reception unit 120 can be configured as an integrated transmission and reception unit, or can be composed of a transmission unit and a reception unit. The transmission unit can also be composed of the transmission processing unit 1211 and the RF unit 122. The reception unit can also be composed of the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

[0198] The transmission and reception antenna 130 can be composed of an antenna that can be described based on common knowledge in the technical field related to the present disclosure, such as an array antenna, etc.

[0199] The transmission and reception unit 120 can also transmit the above-mentioned downlink channels, synchronization signals, downlink reference signals, etc. The transmission and reception unit 120 can also receive the above-mentioned uplink channels, uplink reference signals, etc.

[0200] The transmission and reception unit 120 can also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc. to form at least one of a transmission beam and a reception beam.

[0201] The transmission / reception unit 120 (transmission processing unit 1211) can also perform processing at the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0202] The transmission / reception unit 120 (transmission processing unit 1211) can also perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, digital-to-analog conversion, etc. on the bit string to be transmitted, and output a baseband signal.

[0203] The transmission / reception unit 120 (RF unit 122) can also perform modulation to the radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmission / reception antenna 130.

[0204] On the other hand, the transmission / reception unit 120 (RF unit 122) can also perform amplification, filtering, demodulation to the baseband signal, etc. on the radio frequency band signal received through the transmission / reception antenna 130.

[0205] The transmission / reception unit 120 (reception processing unit 1212) can also perform reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, etc. on the obtained baseband signal, and obtain user data, etc.

[0206] The transmission / reception unit 120 (measurement unit 123) may also perform measurements related to the received signal. For example, the measurement unit 123 may also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may also perform measurements on 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 also be output to the control unit 110.

[0207] The transmission path interface 140 may also transmit and receive signals (backhaul signaling) between the device included in the core network 30, other base stations 10, etc., and may also obtain and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0208] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

[0209] The transmission / reception unit 120 may also receive information on the terminal capabilities corresponding to the CSI codebook type, which is reported based on the index corresponding to the combination of a plurality of parameters related to the CSI-related resources.

[0210] The control unit 110 may also control the transmission of the CSI-related resources based on the received information on the terminal capabilities.

[0211] (User Terminal)

[0212] Figure 8This is a diagram showing an example of the structure of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. Additionally, one or more of the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may be provided respectively.

[0213] Furthermore, in this example, functional blocks of the characteristic parts in this embodiment are mainly shown, and it can also be assumed that the user terminal 20 also has other functional blocks required for wireless communication. A part of the processing of each unit described below may also be omitted.

[0214] The control unit 210 implements overall control of the user terminal 20. The control unit 210 can be composed of a controller, a control circuit, etc. that can be explained based on common knowledge in the technical field related to this disclosure.

[0215] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission / reception unit 220.

[0216] The transmission / reception 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 transmission / reception unit 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, etc. that can be explained based on common knowledge in the technical field related to this disclosure.

[0217] The transmission / reception unit 220 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit. The transmission unit may be composed of the transmission processing unit 2211 and the RF unit 222. The reception unit may be composed of the reception processing unit 2212, the RF unit 222, and the measurement unit 223.

[0218] The transmission / reception antenna 230 can be composed of an antenna that can be explained based on common knowledge in the technical field related to this disclosure, such as an array antenna.

[0219] The transmission / reception unit 220 may also receive the above-mentioned downlink channels, synchronization signals, downlink reference signals, etc. The transmission / reception unit 220 may also transmit the above-mentioned uplink channels, uplink reference signals, etc.

[0220] The transmission / reception unit 220 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc. to form at least one of a transmission beam and a reception beam.

[0221] The transmission / reception unit 220 (transmission processing unit 2211) may also perform, for example, PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210 to generate a bit string to be transmitted.

[0222] The transmission / reception unit 220 (transmission processing unit 2211) may also perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering processing, DFT processing (if necessary), IFFT processing, precoding, digital-to-analog conversion, etc. on the bit string to be transmitted, and output a baseband signal.

[0223] In addition, regarding whether to apply DFT processing, it may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is activated (enabled), the transmission / reception unit 220 (transmission processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using the DFT-s-OFDM waveform. In other cases, the transmission / reception unit 220 (transmission processing unit 2211) may not perform DFT processing as the above-mentioned transmission processing.

[0224] The transmission / reception unit 220 (RF unit 222) may also perform modulation to the radio frequency band, filtering processing, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmission / reception antenna 230.

[0225] On the other hand, the transmission / reception unit 220 (RF unit 222) may also perform amplification, filtering processing, demodulation to the baseband signal, etc. on the radio frequency band signal received through the transmission / reception antenna 230.

[0226] The transmission / reception unit 220 (reception processing unit 2212) may also perform reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, etc. on the obtained baseband signal to obtain user data, etc.

[0227] The transmitting and receiving unit 220 (measurement unit 223) may also perform measurements related to the received signal. For example, the measurement unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may also perform measurements on 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 also be output to the control unit 210.

[0228] In addition, the transmitting unit and the receiving unit of the user terminal 20 of the present disclosure may also be constituted by at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230.

[0229] The transmitting and receiving unit 220 may also transmit the terminal capability corresponding to the CSI codebook type by using an index corresponding to a candidate (e.g., a candidate of a triple / a candidate list of triples) of a combination of a plurality of parameters related to the channel state information (CSI) resource. The transmitting and receiving unit 220 may also transmit information including a candidate of a combination of a plurality of parameters.

[0230] The control unit 210 may also control the reporting of the terminal capability corresponding to the CSI codebook type by using an index corresponding to a candidate of a combination of a plurality of parameters related to the channel state information (CSI) resource.

[0231] The control unit 210 may also separately control (or set / apply) the number of indexes reported as the terminal capability for different CSI codebook types. The candidate of the combination of a plurality of parameters may also be set or reported in at least one of a terminal unit, a band unit, and a band combination unit.

[0232] (Hardware Structure)

[0233] In addition, the block diagrams used in the description of the above embodiments illustrate blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block may be implemented by a physically or logically combined device, or may be implemented by directly or indirectly (e.g., by wire, wireless, etc.) connecting two or more physically or logically separated devices. The functional block may also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0234] Here, in the functions, there are judgment, decision-making, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, establishment, comparison, assumption, expectation, regarded as, broadcasting, notifying, communicating, forwarding, configuration (setting), reconfiguration (reconfiguring), allocation (allocating, mapping), assignment, etc., but are not limited to these. For example, a functional block (structural unit) that implements the transmission function may also be referred to as a transmitting unit, a transmitter, etc. Any of them is as described above, and the implementation method is not particularly limited.

[0235] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may also function as a computer that performs the processing of the wireless communication method of the present disclosure. Figure 9 FIG. is an example of the hardware structure of the base station and the user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 may physically also be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0236] In addition, in the present disclosure, terms such as device, circuit, equipment, section, unit, etc. can be replaced with each other. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured not to include some devices.

[0237] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be executed by one processor, or may be executed by two or more processors simultaneously, sequentially, or by other means. In addition, the processor 1001 may also be implemented by one or more chips.

[0238] Regarding each function in the base station 10 and the user terminal 20, for example, by reading a specific software (program) into hardware such as the processor 1001 and the memory 1002, the processor 1001 performs operations and controls communication via the communication device 1004, or controls at least one of reading and writing data in the memory 1002 and the storage 1003, thereby realizing it.

[0239] The processor 1001, for example, operates the operating system to control the entire computer. The processor 1001 may also be constituted by a central processing unit (Central Processing Unit (CPU)) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like. For example, at least a part of the above control unit 110 (210), transmission / reception unit 120 (220), etc. may also be implemented by the processor 1001.

[0240] In addition, the processor 1001 reads a program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes according to them. As the program, a program that causes the computer to execute at least a part of the operations described in the above embodiments can be used. For example, the control unit 110 (210) may also be implemented by a control program stored in the memory 1002 and operating in the processor 1001, and the same can be applied to other functional blocks.

[0241] The memory 1002 may also be a computer-readable recording medium, and may be constituted by at least one of, for example, a read-only memory (Read Only Memory (ROM)), an erasable programmable read-only memory (Erasable Programmable ROM (EPROM)), an electrically erasable programmable read-only memory (Electrically EPROM (EEPROM)), a random access memory (Random Access Memory (RAM)), and other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store a program (program code), software module, etc. executable for implementing the wireless communication method according to one embodiment of the present disclosure.

[0242] The storage 1003 may also be a computer-readable recording medium, and may be constituted by at least one of, for example, a flexible disc, a floppy (registered trademark) disc, an optical disc (e.g., a compact disc (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disc, a Blu-ray (registered trademark) disc, a removable disc, a hard disk drive, a smart card, a flash device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0243] The communication device 1004 is hardware (a transmitting and receiving device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. In order to implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-described transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be physically or logically separately installed by a transmitting unit 120a (220a) and a receiving unit 120b (220b).

[0244] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs an output to the outside. In addition, the input device 1005 and the output device 1006 may also be of an integrated structure (e.g., a touch panel).

[0245] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be constituted by a single bus or may be constituted by different buses between the respective devices.

[0246] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), etc., and a part or all of each functional block may also be implemented by this hardware. For example, the processor 1001 may also be implemented by at least one of these hardwares.

[0247] (Variant example)

[0248] In addition, the terms described in this disclosure and the terms required for understanding this disclosure may also be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal can also be abbreviated as RS and can also be referred to as a pilot, a pilot signal, etc. according to the applied standard. In addition, a component carrier (Component Carrier (CC)) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0249] A radio frame may also be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) independent of the numerology.

[0250] Here, the numerology may also refer to communication parameters applied in at least one of the transmission and reception of a certain signal or channel. For example, the numerology may also represent at least one of a subcarrier spacing (SubCarrier Spacing (SCS)), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (Transmission Time Interval (TTI)), the number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transmitter-receiver in the frequency domain, a specific windowing process performed by a transmitter-receiver in the time domain, etc.

[0251] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on the numerology.

[0252] A time slot may also include multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of a smaller number of symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as PDSCH (PUSCH) mapping type B.

[0253] A radio frame, subframe, time slot, mini-slot, and symbol all represent time units for transmitting signals. A radio frame, subframe, time slot, mini-slot, and symbol may also use other corresponding names. In addition, time units such as frames, subframes, time slots, mini-slots, and symbols in the present disclosure can also be replaced with each other.

[0254] For example, a subframe can also be referred to as a TTI, multiple consecutive subframes can also be referred to as a TTI, a time slot or a mini-slot can also be referred to as a TTI. That is to say, at least one of a subframe and a TTI can be a subframe (1 ms) in existing LTE, can also be a period shorter than 1 ms (for example, 1 - 13 symbols), or can also be a period longer than 1 ms. In addition, the unit representing a TTI can also not be referred to as a subframe, but as a time slot, mini-slot, etc.

[0255] Here, a TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in units of TTI. In addition, the definition of a TTI is not limited to this.

[0256] A TTI can also be the transmission time unit for data packets (transport blocks), code blocks, codewords, etc. that have undergone channel coding, and can also become the processing unit for scheduling, link adaptation, etc. In addition, when a TTI is given, the time interval (for example, the number of symbols) actually mapped to transport blocks, code blocks, codewords, etc. can also be shorter than the TTI.

[0257] In addition, when a time slot or a mini-slot is referred to as a TTI, one or more TTIs (that is, one or more time slots or one or more mini-slots) can also become the minimum time unit for scheduling. In addition, the number of time slots (mini-slot numbers) constituting the minimum time unit of this scheduling can also be controlled.

[0258] A TTI having a time length of 1 ms can also be referred to as a normal TTI (TTI in 3GPP Rel.8 - 12), standard TTI, long TTI, normal subframe, standard subframe, long subframe, time slot, etc. A TTI shorter than a normal TTI can also be referred to as a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, mini-slot, sub-time slot, time slot, etc.

[0259] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can also be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) can also be interpreted as a TTI having a TTI length less than that of the long TTI and more than 1 ms.

[0260] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may also include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0261] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of one time slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. may also be composed of one or more resource blocks respectively.

[0262] In addition, one or more RBs may also be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0263] In addition, a resource block may also be composed of one or more resource elements (REs). For example, one RE may also be a radio resource area of one subcarrier and one symbol.

[0264] A bandwidth part (BWP) (which may also be referred to as a partial bandwidth, etc.) may also represent a subset of consecutive common RBs (common resource blocks) used for a certain parameter set in a certain carrier. Here, the common RBs may also be determined by the index of the RBs based on the common reference point of the carrier. A PRB may also be defined in a certain BWP and be additionally numbered within that BWP.

[0265] A UL BWP (BWP for UL) and a DL BWP (BWP for DL) may also be included in a BWP. For a UE, one or more BWPs may also be set within one carrier.

[0266] At least one of the set BWPs may be active, and the UE may not assume to transmit and receive specific signals / channels outside the active BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be interpreted as "BWP".

[0267] In addition, the structures such as the above-mentioned radio frames, sub-frames, time slots, mini time slots, and symbols are merely illustrative. For example, the number of sub-frames included in a radio frame, the number of time slots in each sub-frame or radio frame, the number of mini time slots included in a time slot, the number of symbols and RBs included in a time slot or mini time slot, the number of sub-carriers included in an RB, and the number of symbols, symbol length, Cyclic Prefix (CP) length, etc. within a TTI can be changed in various ways.

[0268] In addition, the information, parameters, etc. described in the present disclosure can be represented by absolute values, relative values with respect to a specific value, or can also be represented by corresponding other information. For example, radio resources can also be indicated by a specific index.

[0269] In the present disclosure, the names used for parameters, etc. are not restrictive names in all aspects. In addition, mathematical expressions, etc. using these parameters can also be different from those clearly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name. Therefore, the various names assigned to these various channels and information elements are not restrictive names in all aspects.

[0270] The information, signals, etc. described in the present disclosure can also be represented using any one of various different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0271] In addition, information, signals, etc. can be output to at least one of the higher layer (upper layer) to the lower layer (lower layer) and from the lower layer to the higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0272] The input and output information, signals, etc. can be stored in a specific location (such as a memory), or can be managed using a management table. The input and output information, signals, etc. can be overwritten, updated, or appended. The output information, signals, etc. can also be deleted. The input information, signals, etc. can also be sent to other devices.

[0273] The notification of information is not limited to the methods / embodiments described in this disclosure, and other methods may also be used. For example, the notification of information in this disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0274] In addition, physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, and may also be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration (RRC Connection Re - setting) message, etc. In addition, MAC signaling may also be notified, for example, using a MAC Control Element (MAC CE).

[0275] In addition, the notification of specific information (e.g., the notification of "is X") is not limited to explicit notification, and may also be performed implicitly (e.g., by not performing the notification of the specific information, or by the notification of other information).

[0276] The determination may be made by a value represented by one bit (0 or 1), may also be made by a true - false value (Boolean value) represented by true or false, and may also be made by a numerical comparison (e.g., comparison with a specific value).

[0277] Software, whether referred to as software, firmware, middleware, micro-code, hardware description language, or by any other name, should be broadly construed to mean instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0278] In addition, software, instructions, information, etc. can also be sent and received via a transmission medium. For example, in the case of sending software from a website, server, or other remote source using at least one of wired technologies (coaxial cables, fiber optic cables, twisted pairs, Digital Subscriber Line (DSL), etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included in the definition of the transmission medium.

[0279] Terms such as "system" and "network" used in this disclosure can be used interchangeably. "Network" can also mean a device (e.g., a base station) included in the network.

[0280] In this disclosure, terms such as "precoding", "precoder", "weights (precoding weights)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel", etc. can be used interchangeably.

[0281] In the present disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, femto cell, pico cell, etc.

[0282] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of the base station can be divided into multiple smaller areas, and each of these smaller areas can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides communication services within that coverage range.

[0283] In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "user device (User Equipment (UE))", "terminal" can be used interchangeably.

[0284] In some cases, a mobile station is also referred to as a subscriber station, mobile unit, subscriber unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client, or several other appropriate terms.

[0285] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Additionally, at least one of the base station and the mobile station may also be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), may also be a moving body that moves in an unmanned manner (e.g., a drone, a self-driving vehicle, etc.), and may also be a robot (humanoid or non-humanoid). Additionally, at least one of the base station and the mobile station also includes a device that does not necessarily move during a communication operation. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0286] Furthermore, the base station in the present disclosure may also be interpreted as a user terminal. For example, for a structure in which communication between a base station and a user terminal is replaced by communication between multiple user terminals (e.g., it may also be referred to as Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.), the various aspects / embodiments of the present disclosure can also be applied. In this case, it may also be configured such that the user terminal 20 has the functions of the above-mentioned base station 10. Additionally, expressions such as "uplink" and "downlink" can also be interpreted as expressions corresponding to inter-terminal communication (e.g., "side"). For example, an uplink channel, a downlink channel, etc. can also be interpreted as a side channel.

[0287] Similarly, the user terminal in the present disclosure may also be interpreted as a base station. In this case, it may also be configured such that the base station 10 has the functions of the above-mentioned user terminal 20.

[0288] In the present disclosure, an action performed by the base station may sometimes be performed by its upper node according to circumstances. Apparently, in a network including one or more network nodes having a base station, various actions performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (e.g., considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0289] Each mode / embodiment described in the present disclosure can be used alone, in combination, or switched during execution. In addition, for the processing procedures, sequences, flowcharts, etc. of each mode / embodiment described in the present disclosure, the order can be changed as long as there is no contradiction. For example, for the methods described in the present disclosure, various step elements are presented in the exemplified order, but are not limited to the specific order presented.

[0290] Each mode / embodiment described in the present disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, the 4th generation mobile communication system (4G), the 5th generation mobile communication system (5G), the 6th generation mobile communication system (6G), the xth generation mobile communication system (xG) (xG (x is an integer or a decimal, for example)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, next-generation systems extended based on them, etc. In addition, multiple systems can also be combined (for example, a combination of LTE or LTE-A and 5G) for application.

[0291] As used in this disclosure, the recitation "based on" does not mean "based solely on" unless specifically stated otherwise. In other words, the recitation "based on" means both "based solely on" and "based at least on".

[0292] The term "determining" as used in this disclosure encompasses a variety of actions in some cases. For example, "determining" can also be regarded as a case of "determining" judgment, calculation, computing, processing, derivation, investigation, search (such as looking up (searching), search, inquiry (query) in a table, database, or other data structure), ascertaining, etc.

[0293] In addition, "determining" can also be regarded as a case of "determining" reception (e.g., receiving information), transmission (e.g., transmitting information), input, output, access (e.g., accessing data in a memory), etc.

[0294] In addition, "determining" can also be regarded as a case of "determining" resolution, selection, choosing, establishing, comparing, etc. That is to say, "determining" can also be regarded as a case of "determining" some actions.

[0295] In addition, "determining" can also be interpreted as "assuming", "expecting", "considering", etc.

[0296] As used herein, the terms "connected" and "coupled", and all variations thereof, are intended to mean any direct or indirect connection or coupling between two or more elements, and can include the case where there is one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The coupling or connection between elements can be physical, logical, or a combination of these. For example, "connected" can also be interpreted as "access".

[0297] In the present disclosure, when connecting two elements, it can be considered that one or more wires, cables, printed electrical connections, etc. are used, and electromagnetic energy having wavelengths in the wireless frequency domain, microwave region, optical (both visible and invisible) region, etc. is used as several non-limiting and non-inclusive examples to "connect" or "couple" to each other.

[0298] In the present disclosure, the term "A is different from B" can also mean "A and B are different from each other". In addition, this term can also mean "A and B are respectively different from C". Terms such as "separated" and "coupled" can be similarly interpreted as "different".

[0299] In the present disclosure, when using the terms "include", "including", and their variations, these terms, like the term "comprising", are intended to have an inclusive meaning. Further, the term "or" used in the present disclosure does not mean exclusive or.

[0300] In the present disclosure, for example, in the case where articles are added through translation such as a, an, and the in English, the present disclosure can also include the case where the nouns following these articles are in the plural form.

[0301] As described above, the invention related to the present disclosure has been described in detail. However, for those skilled in the art, the invention related to the present disclosure is obviously not limited to the embodiments described in the present disclosure. The invention related to the present disclosure can be implemented in the form of modifications and changes without departing from the gist and scope of the present invention determined based on the description in the claims. Therefore, the description of the present disclosure is for the purpose of illustration and does not carry any restrictive meaning for the invention related to the present disclosure.

Claims

1. A terminal, comprising: a sending unit that reports a list of candidates of combinations of a plurality of parameters corresponding to a channel state information reference signal resource, i.e., a CSI-RS resource; and a control unit that supports: reporting of capability information related to a CSI-RS resource corresponding to a CSI codebook type for each band domain based on an index representing a candidate of a combination in the list, and reporting of capability information related to a CSI-RS resource corresponding to a CSI codebook type for each band domain combination, reporting of capability information related to a CSI-RS resource corresponding to the CSI codebook type for each of the band domains and reporting of capability information related to a CSI-RS resource corresponding to the CSI codebook type for each of the band domain combinations are controlled based on the same list.

2. A wireless communication method of a terminal, comprising: a step of reporting a list of candidates of combinations of a plurality of parameters corresponding to a channel state information reference signal resource, i.e., a CSI-RS resource; and a step of performing reporting of capability information related to a CSI-RS resource corresponding to a CSI codebook type for each band domain based on an index representing a candidate of a combination in the list, and reporting of capability information related to a CSI-RS resource corresponding to a CSI codebook type for each band domain combination, reporting of capability information related to a CSI-RS resource corresponding to the CSI codebook type for each of the band domains and reporting of capability information related to a CSI-RS resource corresponding to the CSI codebook type for each of the band domain combinations are controlled based on the same list.

3. A base station, comprising: a receiving unit that receives from a terminal a list of candidates of combinations of a plurality of parameters corresponding to a channel state information reference signal resource, i.e., a CSI-RS resource; and a control unit that, based on an index representing a candidate of a combination in the list, determines capability information related to a CSI-RS resource corresponding to a CSI codebook type for each band domain and capability information related to a CSI-RS resource corresponding to a CSI codebook type for each band domain combination sent from the terminal, capability information related to a CSI-RS resource corresponding to the CSI codebook type for each of the band domains and capability information related to a CSI-RS resource corresponding to the CSI codebook type for each of the band domain combinations are determined based on the same list.

4. A system having a terminal and a base station, wherein the terminal has: a sending unit that reports a list of candidates of combinations of a plurality of parameters corresponding to a channel state information reference signal resource, i.e., a CSI-RS resource; and a control unit that supports: reporting of capability information related to a CSI-RS resource corresponding to a CSI codebook type for each band domain based on an index representing a candidate of a combination in the list, and reporting of capability information related to a CSI-RS resource corresponding to a CSI codebook type for each band domain combination, The reporting of the capability information related to the CSI-RS resources corresponding to the CSI codebook type reported for each of the bands, and the reporting of the capability information related to the CSI-RS resources corresponding to the CSI codebook type reported for each of the band combinations, are controlled based on the same list. The base station has: a receiving unit that receives the list from the terminal; and a control unit that determines, based on an index indicating a candidate for combination in the list, the capability information related to the CSI-RS resources corresponding to the CSI codebook type for each band and the capability information related to the CSI-RS resources corresponding to the CSI codebook type for each band combination sent from the terminal.

Images