Terminal, wireless communication method and base station

Abstract

A terminal according to one embodiment of the present disclosure includes: a control unit that determines the number of CSIs reported corresponding to a channel state information report setting, i.e., a CSI report setting, based on a designation according to a high-layer signaling; and a sending unit that sends a CSI report corresponding to the determined number of CSIs. According to one embodiment of the present disclosure, it is possible to appropriately measure and report CSIs for multiple panels / TRPs.

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 the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) is standardized for the purpose of further high-speed data rate, low latency, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) is standardized for the purpose of further increasing the capacity and sophistication of LTE (Release (Rel.) 8, 9 of the Third Generation Partnership Project (3GPP)).

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

[0004] Prior art literature

[0005] Non-patent literature

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

[0007] Problems to be solved by the invention

[0008] In NR, one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi-TRP) are studied using one or more panels (multi-panels) to perform DL transmission (for example, PDSCH transmission) to the user terminal (user terminal, User Equipment (UE)).

[0009] However, in NR specifications such as Rel.15, since multi-panel / TRP is not considered, it is not clear how to measure and report CSI when multi-panel / TRP is used. If CSI measurement and reporting are not performed properly, there is a concern that system performance will be reduced, such as throughput reduction.

[0010] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately measure and report CSI for multiple panels / TRPs.

[0011] Means for solving problems

[0012] A terminal involved in one method of the present disclosure comprises: a control unit that determines the number of CSIs reported corresponding to a channel state information reporting setting, i.e., a CSI reporting setting, based on a specification according to a high-level signaling; and a sending unit that sends a CSI report corresponding to the determined number of CSIs.

[0013] Effects of the Invention

[0014] According to one aspect of the present disclosure, it is possible to appropriately measure and report CSI for multiple panels / TRPs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing the configuration of CSI-RS resources in Example 2-1.

[0016] Figure 2 This is a diagram showing the configuration of interference measurement resources for CSI-RS resources in Example 2-1.

[0017] Figure 3 This is a diagram showing the configuration of CSI-RS resources in Example 2-2.

[0018] Figure 4 This is a diagram showing the configuration of interference measurement resources for CSI-RS resources in Example 2-2.

[0019] Figure 5 This is a diagram showing the configuration of CSI-RS resources in Example 2-3.

[0020] Fig. 6A as well as Figure 6BThis is a diagram showing the configuration of interference measurement resources for CSI-RS resources in Example 2-3.

[0021] Figure 7 This is a diagram showing the configuration of CSI-RS resources in Example 2-4.

[0022] Fig. 8A as well as Figure 8B This is a diagram showing the configuration of interference measurement resources for CSI-RS resources in Example 2-4.

[0023] Fig. 9 This is a diagram showing the configuration of CSI-RS resources in Example 4-1.

[0024] Fig.10 This is a diagram showing the configuration of CSI-RS resources in Example 4-2.

[0025] Fig.11 This is a diagram showing the configuration of CSI-RS resources in Example 4-3.

[0026] Fig.12 This is a diagram showing the configuration of CSI-RS resources in Example 4-4.

[0027] Fig.13 This is a diagram showing the configuration of CSI-RS resources when joint CSI reporting is applied in Proposal 5-1-1.

[0028] Fig.14 This is a diagram showing the configuration of CSI-RS resources when independent CSI reporting is applied in Proposal 5-1-1.

[0029] Fig.15 This is a diagram showing the configuration of CSI-RS resources of Proposal 5-1-2.

[0030] Fig.16 This is a diagram showing the configuration of CSI-RS resources of Proposal 5-1-3.

[0031] Fig.17 This is a diagram showing an example of RRC settings in method 5-2.

[0032] Fig.18 It is a diagram showing the configuration of CSI-RS resources in the case of joint CSI reporting in a modified example.

[0033] Fig.19 This is a diagram showing the configuration of CSI-RS resources in the case of independent CSI reporting in a modified example.

[0034] Fig. 20 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0035] Fig.21 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0036] Fig. 22 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0037] Fig.23 This is a diagram showing an example of the hardware configuration of a base station and a user terminal involved in one embodiment. DETAILED DESCRIPTION

[0038] (CSI report or reporting)

[0039] In Rel.15NR, a terminal (also referred to as a user terminal, user equipment (UE), etc.) generates (also referred to as determining, calculating, estimating, measuring, etc.) channel state information (CSI) based on a reference signal (RS) (or resources used for the RS), and sends (also referred to as reporting, feedback, etc.) the generated CSI to a network (e.g., a base station). The CSI may also be sent to a base station using, for example, an uplink control channel (e.g., a physical uplink control channel (Physical Uplink Control Channel (PUCCH))) or an uplink shared channel (e.g., a physical uplink shared channel (Physical Uplink Shared Channel (PUSCH))).

[0040] The RS used for generating CSI may be, for example, at least one of a Channel State Information Reference Signal (CSI-RS), a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, a Synchronization Signal (SS), a DeModulation Reference Signal (DMRS), etc.

[0041] The CSI-RS may also include at least one of a non-zero power (NZP) CSI-RS and a CSI-interference management (CSI-IM). The SS / PBCH block is a block including SS and PBCH (and corresponding DMRS), and may also be referred to as an SS block (SSB), etc. In addition, the SS may also include at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)).

[0042] In addition, CSI may also include at least one of a channel quality indicator (Channel Quality Indicator (CQI)), a precoding matrix indicator (Precoding Matrix Indicator (PMI)), a CSI-RS resource indicator (CSI-RSResource Indicator (CRI)), a SS / PBCH block resource indicator (SS / PBCH Block Resource Indicator (SSBRI)), a layer indicator (Layer Indicator (LI)), a rank indicator (Rank Indicator (RI)), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), and L1-SNR (Signal to Noise Ratio).

[0043] The UE may also receive information related to CSI reporting (report configuration information) and control CSI reporting based on the report configuration information. The report configuration information may also be, for example, "CSI-ReportConfig" of an information element (IE) of Radio Resource Control (RRC). In addition, in the present disclosure, RRC IE may also be interchangeable with RRC parameters, high-layer parameters, etc.

[0044] The report configuration information (eg, "CSI-ReportConfig" of RRC IE) may also include, for example, at least one of the following.

[0045] Information related to the type of CSI report (report type information, e.g., "reportConfigType" of RRC IE);

[0046] Information on one or more quantities of CSI to be reported (one or more CSI parameters) (report quantity information, such as "reportQuantity" of RRC IE);

[0047] Information on RS resources used for generating the quantity (the CSI parameter) (resource information, for example, "CSI-ResourceConfigId" of RRCIE);

[0048] Information on the frequency domain to be reported by the CSI (frequency domain information, for example, "reportFreqConfiguration" of the RRC IE).

[0049] For example, the report type information may also indicate a periodic CSI (P-CSI) report, an aperiodic CSI (A-CSI) report, or a semi-persistent CSI report (Semi-Persistent CSI (SP-CSI) report).

[0050] In addition, the reporting quantity information may also specify at least one combination of the above-mentioned CSI parameters (e.g., CRI, RI, PMI, CQI, LI, L1-RSRP, etc.).

[0051] In addition, the resource information may be an ID of a resource for RS. The resource for RS may include, for example, a non-zero-power CSI-RS resource or SSB, or a CSI-IM resource (for example, a zero-power CSI-RS resource).

[0052] In addition, the frequency domain information can also indicate the frequency granularity of the CSI report. The frequency granularity may also include, for example, wide band and sub band. Wideband refers to the entire CSI reporting band (entire CSI reporting band). Wideband can be, for example, the entirety of a certain (given (certain)) carrier (component carrier (CC), cell, serving cell), or the entire bandwidth part (Bandwidth part (BWP)) within a certain carrier. Wideband can also be renamed as CSI reporting band, entire CSI reporting band, etc.

[0053] In addition, a subband is a part of a wideband and may be composed of one or more resource blocks (Resource Block (RB) or Physical Resource Block (PRB)). The size of a subband may be determined according to the size of a BWP (the number of PRBs).

[0054] The frequency domain information may also indicate which wideband or subband PMI is reported (the frequency domain information may also include, for example, the "pmi-FormatIndicator" of the RRC IE applied in the decision of which wideband PMI report or subband PMI report). The UE may also determine the frequency granularity of the CSI report (i.e., which wideband PMI report or subband PMI report) based on at least one of the above-mentioned reporting amount information and the frequency domain information.

[0055] In the case where wideband PMI reporting is configured (determined), one wideband PMI may also be reported for all CSI reporting bands. On the other hand, in the case where subband PMI reporting is configured, a single wideband indication may also be provided. 1 A subband indication is reported for each of the one or more subbands in the total CSI report. 2 (eg, a subband indicator for each subband) may also be reported.

[0056] The UE performs channel estimation using the received RS and estimates a channel matrix H. The UE feeds back an index (PMI) determined based on the estimated channel matrix.

[0057] The PMI may also represent a precoder matrix (also simply called a precoder) that the UE considers to be appropriate for use in downlink (DL) transmissions to the UE. Each value of the PMI may also correspond to a precoder matrix. A set of PMI values ​​may also correspond to a set of different precoder matrices called a precoder codebook (also simply called a codebook).

[0058] In the spatial 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 for single beam selection and a second type (type 2 CSI) used for multi-beam selection. A single beam may also be renamed as a single layer, and multi-beams may also be renamed as multiple beams. In addition, type 1 CSI may not assume multi-user multiple input multiple output (MIMO), and type 2 CSI may also assume multi-user MIMO.

[0059] The above codebook may also include a codebook for type 1 CSI (also referred to as type 1 codebook, etc.) and a codebook for type 2 CSI (also referred to as type 2 codebook, etc.). In addition, type 1 CSI may include type 1 single-panel CSI and type 1 multi-panel CSI, and may be specified by different codebooks (type 1 single-panel codebook, type 1 multi-panel codebook).

[0060] In the present disclosure, type 1 and type I may also be replaced with each other. In the present disclosure, type 2 and type II may also be replaced with each other.

[0061] The uplink control information (UCI) type may also include at least one of a hybrid automatic repeat request acknowledgment (HARQ-ACK), a scheduling request (SR), and CSI. UCI may be carried by either the PUCCH or the PUSCH.

[0062] In Rel.15NR, UCI can include a CSI part for wideband PMI feedback. CSI report #n contains PMI wideband information if reported.

[0063] In Rel.15NR, UCI can include two CSI parts for subband PMI feedback. CSI part 1 includes wideband PMI information. CSI part 2 includes one wideband PMI information and several subband PMI information. CSI part 1 and CSI part 2 are coded separately.

[0064] In Rel.15NR, the UE is configured with N (N≥1) report settings of CSI report settings and M (M≥1) resource settings of CSI resource settings through the higher layer. For example, the CSI report setting (CSI-ReportConfig) includes resource settings for channel measurement (resourcesForChannelMeasurement), CSI-IM resource settings for interference (csi-IM-ResourceForInterference), NZP-CSI-RS settings for interference (nzp-CSI-RS-ResourceForInterference), report quantity (reportQuantity), etc. Each of the resource settings for channel measurement, CSI-IM resource settings for interference, and NZP-CSI-RS settings for interference is associated with a CSI resource setting (CSI-ResourceConfig, CSI-ResourceConfigId). The CSI resource setting includes a list of CSI-RS resource sets (csi-RS-ResourceSetList, for example, an NZP-CSI-RS resource set or a CSI-IM resource set).

[0065] For both FR1 and FR2, in order to enable more dynamic channel / interference hypotheses for NCJT, the evaluation and regulation of CSI reports for transmission of multiple TRPs in DL and at least one of multiple panels are being studied.

[0066] (Multiple TRP)

[0067] In NR, one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi TRP (MTRP)) using one or more panels (multi-panels) for DL ​​transmission to the UE is being studied. In addition, the UE is studying the use of one or more panels for UL transmission to one or more TRPs.

[0068] In addition, multiple TRPs may correspond to the same cell identifier (cell identifier (ID)) or different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0069] Multiple TRPs (TRP#1, #2) can also be connected through an ideal / non-ideal backhaul link, and information, data, etc. can be exchanged. Different code words (CW) and different layers can also be sent from each TRP of the multiple TRPs. As a method of sending multiple TRPs, non-coherent joint transmission (NCJT) can also be used.

[0070] In NCJT, for example, TRP1 performs modulation mapping and layer mapping on a first codeword, and uses a first precoding to send a first PDSCH for a first number of layers (e.g., 2 layers). In addition, TRP2 performs modulation mapping and layer mapping on a second codeword, and uses a second precoding to send a second PDSCH for a second number of layers (e.g., 2 layers).

[0071] In addition, multiple PDSCHs (multi-PDSCHs) that are NCJTed can also be defined as partially overlapping or completely overlapping at least one of the time domain and the frequency domain. That is, the first PDSCH from the first TRP and the second PDSCH from the second TRP can also overlap in at least one of the time and frequency resources.

[0072] It can also be assumed that the first PDSCH and the second PDSCH are not in a quasi-co-location (QCL) relationship (not quasi-co-located). The reception of multiple PDSCHs can also be replaced by the simultaneous reception of PDSCHs that are not of a certain QCL type (eg, QCL type D).

[0073] Multiple PDSCHs from multiple TRPs (also referred to as multiple PDSCHs) can also be scheduled using one DCI (single DCI (S-DCI), single PDCCH) (single-master mode). One DCI can also be sent from one TRP of multiple TRPs. Multiple PDSCHs from multiple TRPs can also be scheduled separately using multiple DCIs (multiple DCIs (M-DCI), multiple PDCCHs (multiplePDCCH)) (multiple-master mode). Multiple DCIs can also be sent separately from multiple TRPs. For different TRPs, the UE can also be conceived to send separate CSI reports (CSI reports) related to each TRP. Such CSI feedback can also be referred to as independent feedback, independent CSI feedback, etc. In the present disclosure, "separate" can also be interchanged with "independent".

[0074] In addition, CSI feedback that sends CSI reports related to two TRPs to one TRP can also be used. Such CSI feedback can also be called joint feedback, joint CSI feedback, etc.

[0075] For example, in the case of independent feedback, the UE is configured to use a certain PUCCH (PUCCH1) to send a CSI report for TRP#1 to TRP#1, and use another PUCCH (PUCCH2) to send a CSI report for TRP#2 to TRP#2. In the case of joint feedback, the UE sends a CSI report for TRP#1 and a CSI report for TRP#2 to TRP#1 or #2.

[0076] Based on such a multi-TRP scenario, more flexible transmission control using channels of good quality can be performed.

[0077] Since the CSI for multiple TRPs is usually different for multiple TRPs, it is not clear how to measure and report the CSI for multiple TRPs. For one TRP, the channel / interference premise varies depending on the decision (traffic) of the surrounding TRPs to send.

[0078] For example, a CSI report for independent feedback (also referred to as an independent CSI report) may also be configured using a CSI report configuration (CSI-ReportConfig) associated with a TRP.

[0079] The CSI report configuration may also correspond to a premise of interference for one TRP (i.e., different CSI report configurations may be used for each TRP and each interference premise). The CSI report configuration may also correspond to multiple premises of interference for one TRP (i.e., different CSI report configurations may be used for each TRP, and one CSI report configuration may be associated with multiple premises of interference for a certain TRP).

[0080] In addition, for example, a CSI report for joint feedback (also referred to as a joint CSI report) may also be configured using a CSI report configuration (CSI-ReportConfig) associated with a plurality of TRPs.

[0081] The CSI report configuration may also correspond to one interference premise for each of the multiple TRPs (i.e., a CSI report including CSI for interference premise #1 for TRP#1 and CSI for interference premise #1 for TRP#2 may be configured using a certain CSI report configuration, and a CSI report including CSI for interference premise #2 for TRP#1 and CSI for interference premise #1 for TRP#2 may be configured using another CSI report configuration). The CSI report configuration may also correspond to one interference premise for each of the multiple TRPs (i.e., a CSI report including two CSIs for interference premises #1 and #2 for TRP#1 and two CSIs for interference premises #3 and #4 for TRP#2 may be configured using one CSI report configuration).

[0082] In addition, the CSI report configuration for joint CSI reporting may also include resource configuration for each TRP (at least one of resource configuration for channel measurement, CSI-IM resource configuration for interference, and NZP-CSI-RS configuration for interference). The resource configuration for a certain TRP may also be included in a resource configuration group and configured.

[0083] In addition, the resource setting group can also be identified based on the resource setting group index that is set. The resource setting group can also be interchangeable with the report group. The resource setting group index (also known as the group index) can also indicate the CSI report associated with the TRP (which TRP a certain CSI report (or CSI report setting, CSI resource setting, CSI-RS resource set, CSI-RS resource, TCI state, QCL, etc.) corresponds to). For example, group index #i can also correspond to TRP#i.

[0084] The CSI reporting configuration for independent CSI reporting may also be referred to as independent CSI reporting configuration, independent CSI configuration, etc. The CSI reporting configuration for joint CSI reporting may also be referred to as joint CSI reporting configuration, joint CSI configuration, etc.

[0085] For MTRP, preferably, single TRP (STRP) transmission and MTRP transmission are dynamically switched according to channel status, etc. To this end, the following CSI is obtained:

[0086] It is assumed that the CSI for TRP1 (the first TRP) sent by STRP (hereinafter also referred to as CSI_A)

[0087] It is assumed that the CSI for TRP2 (the second TRP) sent by STRP (hereinafter also referred to as CSI_B)

[0088] CSI for TRP1 (hereinafter also referred to as CSI_C) that considers TRP / inter-beam interference from TRP2, transmitted by NCJT of MTRP,

[0089] ·CSI for TRP2 (hereinafter also referred to as CSI_D) is assumed to be sent by NCJT of MTRP, taking into account TRP / inter-beam interference from TRP1.

[0090] <Aperiodic CSI>

[0091] In the case of aperiodic CSI, each trigger state set using the high-level parameter "CSI-AperiodicTriggerState" is associated with one or more CSI report settings (CSI-ReportConfig). Each CSI report setting is linked to a periodic, semi-persistent, or aperiodic resource setting.

[0092] In case a resource configuration is configured, the resource configuration (given via the higher layer parameter resourcesForChannelMeasurement) is used for channel measurement for L1-RSRP or L1-SINR calculation.

[0093] When two resource settings are set, the initial resource setting (assigned by the higher-level parameter resourcesForChannelMeasurement) is used for channel measurement, and the second resource setting (assigned by the higher-level parameter csi-IM-ResourcesForInterference or nzp-CSI-RS-ResourcesForInterference) is used for interference measurement performed via CSI-IM or NZP-CSI-RS.

[0094] When three resource settings are constructed, the initial resource setting (assigned through the high-level parameter resourcesForChannelMeasurement) is used for channel measurement, the second resource setting (assigned through the high-level parameter csi-IM-ResourcesForInterference) is used for interference measurement based on CSI-IM, and the third resource setting (assigned through the high-level parameter nzp-CSI-RS-ResourcesForInterference) is used for interference measurement based on NZP-CSI-RS.

[0095] In the case where non-periodic CSI is applied, NR can also support interference measurements based only on ZP-CSI-RS, only on NZP-CSI-RS, and on both ZP-CSI-RS and NZP-CSI-RS.

[0096] <Semi-persistent or periodic CSI>

[0097] In the case where semi-persistent or periodic CSI is applied, each CSI report configuration (CSI-ReportConfig) is linked to a periodic or semi-persistent resource setting.

[0098] When a resource setting (assigned by the higher layer parameter resourcesForChannelMeasurement) is configured, the resource setting is used for channel measurements for L1-RSRP calculation.

[0099] When two resource settings are configured, the first resource setting (assigned by the higher layer parameter resourcesForChannelMeasurement) is used for channel measurements, and the second resource setting (assigned by the higher layer parameter csi-IM-ResourcesForInterference) is used for interference measurements performed via CSI-IM.

[0100] In the case where semi-persistent or periodic CSI is applied, NR can also support only interference measurements based on ZP-CSI-RS.

[0101] <CSI-IM resources and CSI-RS resources>

[0102] The CSI-IM resources for interference measurements, the NZP-CSI-RS resources for interference measurements, and the NZP-CSI-RS resources for channel measurements are configured via higher layer signaling for one or more CSI resource settings for channel and interference measurements.

[0103] The UE may also assume that the NZP-CSI-RS resources for channel measurements are QCL per resource with the CSI-IM resources for interference measurements configured for one CSI report with respect to "QCL-TypeD". When the NZP-CSI-RS resources are used for interference measurements, the UE may also assume that the NZP-CSI-RS resources for channel measurements and the CSI-IM resources or NZP-CSI-RS resources configured as one for interference measurements. The CSI reports are QCL with respect to "QCL-TypeD".

[0104] When ZP-CSI-RS-based interference measurement is applied, the UE may also assume that the same receiving beam as the beam indicated as being used for channel measurement by the base station (gNB) is used for interference measurement.

[0105] In the case where interference measurement is performed through CSI-IM, each CSI-RS resource for channel measurement is associated with the CSI-IM resource in resource units through the order of the CSI-RS resources and CSI-IM resources in the corresponding resource set. The number of CSI-RS resources for channel measurement may also be the same as the number of CSI-IM resources.

[0106] In the case of interference measurement using ZP-CSI-RS, CSI-RS resources for channel measurement and CSI-RS resources for interference measurement are associated with each resource, that is, one-to-one mapping.

[0107] <UE Operations Related to Interference Measurement>

[0108] When CSI measurement other than L1-SINR is applied, the UE may also assume at least one of the following (1)-(3).

[0109] (1) Each NZP-CSI-RS port set for interference measurement corresponds to an interference transmission layer.

[0110] (2) All interfering transmission layers on the NZP-CSI-RS port for interference measurement are considered with the associated Energy Per Resource Element (EPRE) ratio.

[0111] (3) Other interference signals on resource elements (RE) of NZP-CSI-RS resources for channel measurement, NZP CSI-RS resources for interference measurement, or CSI-IM resources for interference measurement are used.

[0112] When L1-SINR measurement using dedicated interference measurement resources is applied, the UE assumes that the total received power of the dedicated NZP-CSI-RS resources for interference measurement or the dedicated CSI-IM resources for interference measurement corresponds to interference and noise.

[0113] <Joint CSI Report>

[0114] [Assumption 1] One CSI report configuration (CSI-ReportConfig) corresponds to multiple TRPs with multiple interference conditions. In this case, multiple CSIs are reported in one CSI report.

[0115] [Assumption 2] One CSI report configuration corresponds to multiple TRPs with one interference premise. In this case, multiple CSIs are reported in one CSI report.

[0116] <Independent CSI Report>

[0117] [Assumption 3] One CSI report configuration corresponds to one TRP with multiple interference premises # 1. In this case, multiple CSIs are reported in one CSI report.

[0118] [Assumption 4] One CSI report setting corresponds to a TRP with one interference premise #1. In this case, one CSI is reported in one CSI report.

[0119] Joint CSI reporting and independent CSI reporting are being studied, but it is not clear how to measure and report CSI. Specifically, there are the following problems.

[0120] [Question 1] It is unclear which resource can be set for interference measurement of NCJT.

[0121] [Question 2] It is unclear whether the NZP-CSI-RS resources used for channel measurement and the ZP-CSI-RS resources used for interference measurement can overlap.

[0122] [Issue 3] The UE's assumptions and operations related to interference measurement are not clear.

[0123] [Question 4] It is unclear what to use in the UE's reception beam for the ZP-CSI-RS resources used for interference measurement.

[0124] [Question 5] There is no clear method for determining the amount of CSI to be reported, or for selecting the CMR / IMR to be used for CSI reporting.

[0125] If CSI is not measured and reported properly, there is a concern that system performance may be degraded, such as a decrease in throughput. Therefore, the inventors of the present invention have conceived a method for appropriately measuring and reporting CSI for multiple panels / TRPs.

[0126] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the embodiments may be applied individually or in combination.

[0127] In the present disclosure, "A / B" and "at least one of A and B" may also be used interchangeably.

[0128] In the present disclosure, panel, uplink (UL) transmission entity, TRP, spatial relationship, control resource set (CORESET), PDSCH, codeword, base station, antenna port of a certain signal (for example, demodulation reference signal (DMRS)) port), antenna port group of a certain signal (for example, DMRS port group), group for multiplexing (for example, code division multiplexing (CDM)) group, reference signal group, CORESET group), CORESET pool, CW, redundancy version (RV), layer (MIMO layer, transmission layer, spatial layer) can also be replaced with each other. In addition, panel identifier (ID) and panel can also be replaced with each other. In the present disclosure, TRP ID and TRP can also be replaced with each other.

[0129] In the present disclosure, NCJT, NCJT using multiple TRPs, multiple PDSCHs using NCJT, multiple PDSCHs, multiple PDSCHs from multiple TRPs, etc. may also be interchangeable. In addition, multiple PDSCHs may mean multiple PDSCHs overlapping at least a portion of time resources (e.g., 1 symbol), multiple PDSCHs overlapping all of time resources (e.g., all symbols), multiple PDSCHs not overlapping all of time resources, multiple PDSCHs carrying the same TB or the same CW, or multiple PDSCHs to which different UE beams (spatial domain receive filters, QCL parameters) are applied.

[0130] In the present disclosure, cell, CC, carrier, BWP, and band may be replaced with each other.

[0131] In the present disclosure, index, ID, indicator, resource ID, etc. may also be replaced with each other. In the present disclosure, beam, TCI, TCI state, DL TCI state, UL TCI state, unified TCI state, QCL, QCL assumption, spatial relationship, spatial relationship information, precoder, etc. may also be replaced with each other.

[0132] In the present disclosure, list, group, set, subset, cluster, etc. may also be replaced with each other.

[0133] In the present disclosure, TRP index, CORESET pool index (CORESETPoolIndex), pool index, group index, CSI report setting group index, CSI report group index, CSI report setting index, CSI report setting group index, and resource setting group index can also be replaced with each other.

[0134] In the present disclosure, resource setting for channel measurement, resource for channel measurement, and resourcesForChannelMeasurement may also be replaced with each other. In the present disclosure, CSI-IM resource setting for interference, CSI-IM based (CSI-IM based) interference measurement resource, csi-IM-ResourceForInterference, and interference measurement resource may also be replaced with each other. In the present disclosure, NZP-CSI-RS resource setting for interference, NZP-CSI-RS based (NZP-CSI-RS based) interference measurement resource, nzp-CSI-RS-ResourceForInterference, and interference measurement resource may also be replaced with each other.

[0135] In the present disclosure, CSI report, CSI report setting, CSI setting, resource setting, resource setting, etc. may also be replaced with each other. In addition, in the present disclosure, support, control, controllable, operation, operationable, execution, executionable, etc. may also be replaced with each other.

[0136] (Wireless Communication Method)

[0137] <First Embodiment>

[0138] The UE receives in at least one of the ZP-CSI-RS resources and NZP-CSI-RS resources configured for multiple transmission and reception points (multi-TRP). The UE may also control (support) interference measurement (IM) for at least one of periodic CSI reporting, semi-persistent CSI reporting, and non-periodic CSI reporting based on the reception. In the first embodiment, NCJT may be used as multi-TRP transmission, multiple PDSCHs may be configured, or S-DCI or M-DCI may be configured.

[0139] In the present disclosure, "S-DCI is set" may also be replaced by "M-TRP transmission based on S-DCI is set or indicated or used." In the present disclosure, "M-DCI is set" may also be replaced by "M-TRP transmission based on M-DCI is set or indicated or used." In the present disclosure, "M-TRP is set" may also be replaced by "M-TRP transmission is set or indicated or used."

[0140] In the following options 1-1 to 1-3, the UE may also control (support) interference measurement (InterferenceMeasurement (IM)) for at least one of periodic / semi-persistent CSI reporting and aperiodic CSI reporting based only on the ZP-CSI-RS.

[0141] [Option 1-1] The UE supports interference measurement based only on ZP-CSI-RS for periodic / semi-persistent CSI reporting, and does not support interference measurement based only on ZP-CSI-RS for aperiodic CSI reporting.

[0142] [Option 1-2] The UE supports interference measurement based only on ZP-CSI-RS for aperiodic CSI reporting, and does not support interference measurement based only on ZP-CSI-RS for periodic / semi-persistent CSI reporting.

[0143] [Option 1-3] The UE supports interference measurement based on ZP-CSI-RS only for both periodic / semi-persistent CSI reporting and aperiodic CSI reporting.

[0144] In the following options 2-1 to 2-3, the UE may also control (support) interference measurement for at least one of periodic / semi-persistent CSI reporting and aperiodic CSI reporting based only on the NZP-CSI-RS.

[0145] [Option 2-1] The UE supports interference measurement based only on NZP-CSI-RS for periodic / semi-persistent CSI reporting, and does not support interference measurement based only on NZP-CSI-RS for aperiodic CSI reporting.

[0146] [Option 2-2] The UE supports interference measurement based only on NZP-CSI-RS for aperiodic CSI reporting, and does not support interference measurement based only on NZP-CSI-RS for periodic / semi-persistent CSI reporting.

[0147] [Option 2-3] The UE supports interference measurement based on NZP-CSI-RS only for both periodic / semi-persistent CSI reporting and aperiodic CSI reporting.

[0148] In the following options 3-1 to 3-3, the UE may also control (support) interference measurement for at least one of periodic / semi-persistent CSI reporting and aperiodic CSI reporting based on both ZP-CSI-RS and NZP-CSI-RS.

[0149] [Option 3-1] The UE supports interference measurement based on ZP-CSI-RS and NZP-CSI-RS for periodic / semi-persistent CSI reporting, and does not support interference measurement based on ZP-CSI-RS and NZP-CSI-RS for aperiodic CSI reporting.

[0150] [Option 3-2] supports interference measurement based on ZP-CSI-RS and NZP-CSI-RS for non-periodic CSI reporting, but does not support interference measurement based on ZP-CSI-RS and NZP-CSI-RS for periodic / semi-persistent CSI reporting.

[0151] [Option 3-3] Supports interference measurement based on ZP-CSI-RS and NZP-CSI-RS for both periodic / semi-persistent CSI reporting and aperiodic CSI reporting.

[0152] According to the first embodiment, it becomes clear which resource can be set for interference measurement of NCJT (for multiple TRPs), and it is possible to solve the above-mentioned problem 1. In addition, in the following embodiments, any one of options 1-1 to 1-3 may be used as a premise.

[0153] <Second Embodiment>

[0154] In the case of deriving CSI feedback (in the case of sending CSI reports), the UE assumes that the NZP-CSI-RS resources for channel measurement and the ZP-CSI-RS resources for interference measurement are set to be non-overlapping (not assumed to be set to overlap). The UE may also assume that the NZP-CSI-RS resources for channel measurement of one TRP among multiple TRPs and the ZP-CSI-RS resources for interference measurement of other transmitting and receiving points in multiple TRPs are set to be non-overlapping. Resources may also be replaced by time and frequency resources, time resources, or frequency resources. The following method 2-1 is applied to joint CSI reporting, and method 2-2 is applied to independent CSI reporting.

[0155] [Method 2-1]

[0156] The UE may also assume that, in the same resource configuration group, the NZP-CSI-RS resources for channel measurement and the ZP-CSI-RS resources for interference measurement are configured so as not to overlap. The “same resource configuration group” may also be replaced with “resource configuration associated with the same TRP”.

[0157] The UE may also assume that NZP-CSI-RS resources for channel measurement and ZP-CSI-RS resources for interference measurement are configured to be non-overlapping across different resource configuration groups. "Different resource configuration groups" may also be replaced by "resource configuration associated with different TRPs".

[0158] [Method 2-2]

[0159] The UE may also assume that, in the resource configuration associated with the same CSI reporting configuration, the NZP-CSI-RS resource for channel measurement and the ZP-CSI-RS resource for interference measurement are configured to be non-overlapping. "Resource configuration associated with the same CSI reporting configuration" may also be replaced with "resource configuration associated with the same TRP".

[0160] The UE may also assume that, across resource settings associated with different CSI reporting settings, the NZP-CSI-RS resources for channel measurement and the ZP-CSI-RS resources for interference measurement are configured to be non-overlapping. "Resource settings associated with different CSI reporting settings" may also be replaced with "resource settings associated with different TRPs".

[0161] As an example of the second embodiment, the following examples 2-1 to 2-4 are described. Examples 2-1 to 2-4 correspond to the above-mentioned assumptions 1 to 4, respectively. Example 2-1 can also be applied to Example 2-1 and Example 2-2. Example 2-2 can also be applied to Example 2-3 and Example 2-4.

[0162] [Example 2-1]

[0163] Figure 1 This is a diagram showing the configuration of CSI-RS resources in Example 2-1. Figure 2 FIG. 2 is a diagram showing the configuration of interference measurement resources for CSI-RS resources in Example 2-1. Figure 1 In the example, resource configuration group #0 is associated with TRP #1, and resource configuration group #1 is associated with TRP #2. Resource configuration group #0 (TRP #1) includes resource configurations #0, #1, and #2. Resource configuration group #1 (TRP #2) includes resource configurations #3, #4, and #5. Each resource configuration is associated with CSI report configuration #0.

[0164] Figure 1The resources in include channel measurement resources (CMR) and interference measurement resources (IMR). CMR (CSI-RS resource set #0) is associated with resource setting #0. IMR (CSI-IM resource set #1) is associated with resource setting #1. IMR (CSI-IM resource set #2) is associated with resource setting #2. CMR (CSI-RS resource set #3) is associated with resource setting #3. IMR (CSI-IM resource set #4) is associated with resource setting #4. IMR (CSI-IM resource set #5) is associated with resource setting #5. As shown in Example 2-1, CMR and IMR are mapped one-to-one in each corresponding resource.

[0165] In Example 2-1, the NZP-CSI-RS resources (CMR) and ZP-CSI-RS resources (IMR) of the same TRP (resource setting group) do not overlap. In addition, the NZP-CSI-RS resources (CMR) of TRP#1 and the ZP-CSI-RS resources (IMR) of TRP#2 do not overlap. That is, the CMR and IMR corresponding to different TRPs (resource setting groups) do not overlap. In addition, among the ZP-CSI-RS of TRP#1, there are RSs that are interfered with by TRP#2 and RSs that are not interfered with. Similarly, among the ZP-CSI-RS of TRP#2, there are RSs that are interfered with by TRP#1 and RSs that are not interfered with.

[0166] [Example 2-2]

[0167] Figure 3 This is a diagram showing the configuration of CSI-RS resources in Example 2-2. Figure 4 This is a diagram showing the configuration of resources for interference measurement of CSI-RS resources in Example 2-2. Example 2-2 is different from Example 2-1 in that each of the resource configuration groups #0 and #1 (TRP#1 and #2) that are associated with the IMR is one. In addition, Example 2-2 is different from Example 2-1 in that there is no "ZP CSI-RS of TRP#1without interference from TRP#2" in the resources of TRP#1, and there is no "ZP CSI-RS of TRP#1without interference from TRP#1" in the resources of TRP#2.

[0168] In Example 2-2, the NZP-CSI-RS resources (CMR) and ZP-CSI-RS resources (IMR) of the same TRP (resource setting group) do not overlap. In addition, the NZP-CSI-RS resources (CMR) of TRP#1 and the ZP-CSI-RS resources (IMR) of TRP#2 do not overlap (in different resource setting groups). That is, the CMRs and IMRs corresponding to different TRPs (resource setting groups) do not overlap. In Example 2-2, CSI reporting with inter-TRP interference can also be applied.

[0169] [Example 2-3]

[0170] Figure 5 This is a diagram showing the configuration of CSI-RS resources in Example 2-3. Fig. 6A as well as Figure 6B This is a diagram showing the configuration of interference measurement resources for CSI-RS resources in Example 2-3. Example 2-3 is different from Example 2-1 in that the CSI report configuration of TRP#1 is different from the CSI report configuration of TRP#2. Resource configuration group #0 of TRP#1 is associated with CSI report configuration #0 of TRP#1, and resource configuration group #1 of TRP#2 is associated with CSI report configuration #1 of TRP#2.

[0171] Fig. 6A This is a diagram showing the configuration of interference measurement resources for CSI-RS resources of TRP#1 (CSI report configuration #0) in Example 2-3. Figure 6B This is a diagram showing the configuration of interference measurement resources for CSI-RS resources of TRP#2 (CSI report configuration #2) in Example 2-3. That is, in Example 2-3, since the two CSI report configurations are associated with the two resource configuration groups, respectively, it shows the configuration corresponding to each of the two CSI report configurations.

[0172] In Example 2-3, the NZP-CSI-RS resources (CMR) and ZP-CSI-RS resources (IMR) of the same TRP (CSI report setting) do not overlap. In addition, the NZP-CSI-RS resources (CMR) of TRP#1 and the ZP-CSI-RS resources (IMR) of TRP#2 do not overlap. In other words, the CMR and IMR corresponding to different TRPs (CSI report settings) do not overlap.

[0173] [Example 2-4]

[0174] Figure 7 This is a diagram showing the configuration of CSI-RS resources in Example 2-4. Fig. 8A as well as Figure 8BThis is a diagram showing the configuration of interference measurement resources for CSI-RS resources in Example 2-4. Example 2-4 differs from Example 2-2 in that the CSI report configuration of TRP#1 is different from the CSI report configuration of TRP#2. Resource configuration group #0 of TRP#1 is associated with CSI report configuration #0 of TRP#1, and resource configuration #1 of TRP#2 is associated with CSI report configuration group #1 of TRP#2.

[0175] Fig. 8A This is a diagram showing the configuration of interference measurement resources for CSI-RS resources of TRP#1 (CSI report configuration #0) in Example 2-4. Figure 8B This is a diagram showing the configuration of interference measurement resources for CSI-RS resources of TRP#2 (CSI report configuration #2) in Example 2-4. That is, in Example 2-4, since the two CSI report configurations are associated with the two resource configuration groups, respectively, it shows the configuration corresponding to each of the two CSI report configurations.

[0176] In Example 2-4, the NZP-CSI-RS resources (CMR) and ZP-CSI-RS resources (IMR) of the same TRP (CSI report setting) do not overlap. In addition, the NZP-CSI-RS resources (CMR) of TRP#1 and the ZP-CSI-RS resources (IMR) of TRP#2 do not overlap. That is, the IMRs corresponding to different TRPs (CSI report settings) do not overlap. In addition, in Example 2-4, CSI reporting with inter-TRP interference can also be applied.

[0177] According to the second embodiment, it becomes clear whether the NZP-CSI-RS resources for channel measurement and the ZP-CSI-RS resources for interference measurement can overlap, and the above-mentioned problem 2 can be solved.

[0178] <Third Embodiment>

[0179] The UE may also assume that in the interference measurement for multiple transmit receive points (TRPs), the total received power of the dedicated CSI-IM resource (IMR) used for interference measurement corresponds to the interference and noise. The interference measurement may also be the interference measurement of NCJT. The interference may include or not include the interference between TRPs according to the settings of the base station (gNB).

[0180] When performing interference measurement based on ZP-CSI-RS, the UE can also measure the inter-TRP interference from the PDSCH of the TRP giving the interference. However, in reality, there is a high possibility that the service is a burst. Therefore, in order to improve the accuracy of interference measurement based only on ZP-CSI-RS, the UE can also average the interference.

[0181] According to the third embodiment, the concept and operation of the UE related to interference measurement become clear, and the above-mentioned problem 3 can be solved.

[0182] <Fourth Embodiment>

[0183] The UE receives multiple interference measurement resources (IMRs) and multiple channel measurement resources (CMRs) configured for multiple transmission and reception points, and assumes that the IMR and CMR configured for one of the multiple transmission and reception points are QCL. The QCL may be, for example, QCL type D or other QCL types. "Imagine that IMR and CMR are QCL" may also be replaced with "Imagine that IMR and CMR are QCLed", "Equal to QCL configured as IMR and CMR", "Not assuming that IMR and CMR are configured as resources different from QCL", or "Imagine that IMR and CMR are QCL even if QCL is not configured for at least one of the IMR and CMR". QCL may also be replaced with spatial QCL.

[0184] For the interference measurement resources (IMR) based on ZP-CSI-RS, the UE may assume the same QCL assumption (QCL-type D) as the QCL assumption set for the NZP-CSI-RS resources (CMR) for channel measurement.

[0185] When a resource setting for channel measurement is associated with multiple resource settings for interference measurement, the UE can also imagine that the CSI-IM resources (IMR) of each resource setting for interference measurement and the NZP-CSI-RS resources (CMR) for channel measurement are QCL in resource units for "QCL type D" (corresponding to Examples 4-1 and 4-3 described later).

[0186] [Method 4-1]

[0187] In method 4-1, an example of making a joint CSI report is described. The UE can also assume that the NZP-CSI-RS resource set (CMR set) for channel measurement and the CSI-IM resource set (IMR set) for interference measurement are set for one resource setting group, with the resource unit being QCL for "QCL-Type D". That is, in method 4-1, CMR and IMR can also be set for one resource setting group. One resource setting group can also be associated with one TRP.

[0188] As examples of the method 4-1, the following examples 4-1 and 4-2 are described. Example 4-1 corresponds to the above-mentioned assumption 1, and example 4-2 corresponds to the above-mentioned assumption 2.

[0189] (Example 4-1)

[0190] Fig. 9 is a diagram showing the configuration of CSI-RS resources in Example 4-1. Fig. 9 In, with Figure 1 Similarly, resource configuration group #0 (TRP #1) includes resource configurations #0, #1, and #2. Furthermore, resource configuration group #1 (TRP #2) includes resource configurations #3, #4, and #5. Each resource configuration is associated with CSI report configuration #0.

[0191] Fig. 9 The resources in the channel measurement resource set (CMR set) and the interference measurement resource set (IMR set) are included. The correspondence between the channel measurement resource set and the interference measurement resource set and each resource setting is as follows: Figure 1 The same. The resource set for channel measurement and the resource set for interference measurement are mapped one-to-one in the corresponding resources. And, in each of TRP#1 (resource setting group #0) and TRP#2 (resource setting group #1), multiple resources in a resource set for channel measurement and multiple resources in each resource set of multiple interference measurement resource sets set for one resource setting group (#0 or #1) are QCL in resource units with respect to "QCL type D".

[0192] (Example 4-2)

[0193] Fig.10 This is a diagram showing the configuration of CSI-RS resources in Example 4-2. Fig.10 The interference measurement resource set corresponding to one resource configuration group (one TRP) is one. Fig. 9 Different. Fig.10 As shown, in each of TRP#1 (resource setting group #0) and TRP#2 (resource setting group #1), multiple resources in a resource set for channel measurement and multiple resources IMRs in a resource set for interference measurement set for a resource setting group (#0 or #1) are QCL in resource units with respect to "QCL type D".

[0194] [Method 4-2]

[0195] In method 4-2, an example of making an independent CSI report is described. The UE can also assume that the NZP-CSI-RS resource set (CMR set) for channel measurement and the CSI-IM resource set (IMR set) for interference measurement are set for one CSI report (CSI report setting) with the resource unit being QCL for "QCL-Type D". That is, in method 4-2, CMR and IMR can also be set for one CSI report. One CSI report setting can also be associated with one TRP. One resource setting group can also be associated with one TRP.

[0196] As an example of method 4-2, the following examples 4-3 and 4-4 are described. Example 4-3 corresponds to the above-mentioned assumption 3, and example 4-4 corresponds to the above-mentioned assumption 4.

[0197] (Example 4-3)

[0198] Fig.11 is a diagram showing the configuration of CSI-RS resources in Example 4-3. Fig. 9 In , one CSI report setting is associated with multiple (two) resource setting groups (TRPs), but in Fig.11 In this case, a CSI report setting is associated with a resource setting group (TRP). Fig. 9 different.

[0199] Fig.11 The resources in the channel measurement resource set (CMR set) and the interference measurement resource set (IMR set) are included. The correspondence between the channel measurement resource set and the interference measurement resource set and each resource setting is as follows: Fig. 9 The same. The resource set for channel measurement and the resource set for interference measurement are mapped one-to-one in the corresponding resources. In addition, in TRP#1 (resource setting group #0), multiple resources in a resource set for channel measurement and multiple resources in each resource set of multiple interference measurement resource sets configured for a CSI report (CSI report configuration) are QCL in resource units for "QCL type D".

[0200] (Example 4-4)

[0201] Fig.12 This is a diagram showing the configuration of CSI-RS resources in Example 4-4. Fig.12 The interference measurement resource set corresponding to one resource configuration group (one TRP) is one. Fig.11 Different. Fig.12As shown, in TRP#1 (resource setting group #0), multiple resources in a channel measurement resource set and multiple resources in an interference measurement resource set configured for a CSI report (CSI report configuration) are QCL in resource units with respect to "QCL type D".

[0202] In the fourth embodiment, by considering the QCL relationship between IMR and CMR, it is possible to determine what to use in the reception beam of the UE for the ZP-CSI-RS resource for interference measurement. Thus, the above-mentioned problem 4 can be solved.

[0203] <Fifth Embodiment>

[0204] The UE may also determine the number of CSI (e.g., RI / PMI / CQI, etc.) reported corresponding to the CSI report configuration based on the designation according to the higher layer signaling, and send a CSI report corresponding to the determined number of CSI. In the present disclosure, "CSI report configuration" and "CSI report configuration" may also be interchangeable.

[0205] [Method 5-1]

[0206] The UE may also determine the number of CSI (e.g., RI / PMI / CQI, etc.) reported corresponding to the CSI reporting configuration based on the number of resource configurations specified by parameters related to interference measurement resources (IMR) in higher layer signaling (e.g., RRC parameter "csi-IM-ResourcesForInterference"). For one resource configuration for interference measurement, one CSI may also be reported.

[0207] When multiple CMRs are set in the resource settings for channel measurement and multiple IMRs are set in each resource setting for interference measurement, in order to select CMR and IMR for CSI derivation / calculation, the following proposals 5-1-1 and 5-1-2 can also be applied.

[0208] (Proposal 5-1-1)

[0209] CMR and IMR are selected for CSI derivation according to the UE installation. The UE may also report multiple CSIs corresponding to different CMRs. The CMR may also be a CMR in the resource setting group in the case of joint CSI reporting, and a CMR in the CSI report setting in the case of independent CSI reporting.

[0210] Fig.13 This is a diagram showing the configuration of CSI-RS resources when joint CSI reporting is applied in Proposal 5-1-1. Fig.13This corresponds to the above assumption 1. The relationship between each resource configuration group, each resource configuration, and CSI report configuration is Figure 1 , Fig. 9 In addition, the relationship between the channel measurement resource set (CMR set), the interference measurement resource set (IMR set) and each resource setting is the same as Figure 1 , Fig. 9 same.

[0211] For example, the UE reports CSI#1 corresponding to (CMR#1, IMR#1). The UE reports CSI#2 corresponding to (CMR#2, IMR#6). In the case of joint CSI reporting, (CMR#1, IMR#1) and (CMR#2, IMR#6) are configured in resource configuration group #0.

[0212] Fig.14 This is a diagram showing the configuration of CSI-RS resources when independent CSI reporting is applied in Proposal 5-1-1. Fig.14 In this case, a CSI report configuration group (TRP) is associated with a CSI report configuration. Fig.13 different. Fig.14 This corresponds to the above assumption 3. The UE reports CSI#1 corresponding to (CMR#1, IMR#1). The UE reports CSI#2 corresponding to (CMR#2, IMR#6). In the case of joint CSI reporting, (CMR#1, IMR#1) and (CMR#2, IMR#6) are configured in CSI reporting configuration #0.

[0213] (Proposal 5-1-2)

[0214] Proposal 5-1-2 is applied to joint CSI reporting. The UE may not report a plurality of CSIs corresponding to different CMRs within a resource configuration group (it may not anticipate / assume reporting).

[0215] [Option 1]

[0216] The UE may also determine / select the CMR for CSI calculation / derivation based on the L1-SINR.

[0217] [Option 1-1]

[0218] The UE may determine / select the CMR for CSI calculation / derivation based on the best (highest) L1-SINR of the initial resource configuration for IM within the resource configuration group.

[0219] For example, 4 CMRs are set in the resource configuration for CM, 4 IMRs are set for each resource configuration for IM, and 8 IMRs are set. Initially, the UE calculates L1-SINR / CQI from one CMR and one IMR corresponding to the 4 CMRs in the resource configuration for CM and the 4 IMRs in the initial resource configuration for IM, and selects the CMR corresponding to the best L1-SINR / CQI from the 4 L1-SINR / CQIs. Then, the UE derives the CSI of the IMR associated with the CMR in the selected CMR and each resource configuration.

[0220] [Option 1-2]

[0221] The UE may determine / select the CMR for CSI calculation / derivation based on the best (highest) L1-SINR of the last resource configuration for IM within the resource configuration group.

[0222] For example, 4 CMRs are set in the resource configuration for CM, 4 IMRs are set for each resource configuration for IM, and 8 IMRs are set. Initially, the UE calculates L1-SINR / CQI from one CMR and one IMR corresponding to the 4 CMRs in the resource configuration for CM and the 4 IMRs in the last resource configuration for IM, and selects the CMR corresponding to the best L1-SINR / CQI from the 4 L1-SINR / CQIs. Then, the UE derives the CSI of the IMR associated with the CMR in the selected CMR and each resource configuration.

[0223] [Options 1-3]

[0224] The UE may determine / select the CMR for CSI calculation / derivation based on the best (highest) L1-SINR of all resource configurations for IM within the resource configuration group.

[0225] For example, 4 CMRs are set in the resource setting for CM, 4 IMRs are set for each resource setting for IM, and 8 IMRs are set. Initially, the UE calculates L1-SINR / CQI from one CMR and one IMR corresponding to the 4 CMRs in the resource setting for CM and the 4 IMRs in each resource setting for IM, and selects the CMR corresponding to the best L1-SINR / CQI among all the calculated L1-SINR / CQIs. Then, the UE derives the CSI of the IMR associated with the CMR in the selected CMR and each resource setting.

[0226] [Option 2]

[0227] The UE may also determine / select the CMR for CSI calculation / derivation based on the L1-RSRP. The UE may also determine / select the CMR for CSI calculation / derivation based on the best (highest) L1-RSRP of the resource setting for CM within the resource setting group.

[0228] For example, in the resource setting for CM, 4 CMRs are set, and for each resource setting for IM, 4 IMRs are set, and 8 IMRs are set. Initially, the UE calculates the L1-RSRP for the 4 CMRs in the resource setting for CM and selects the CMR corresponding to the best L1-RSRP. Then, the UE derives the CSI of the IMRs associated with the selected CMR in each resource setting.

[0229] [Option 3]

[0230] The UE may also determine / select the CMR for CSI calculation / derivation based on the combination of L1-RSRP and L1-SINR.

[0231] [Option 3-1]

[0232] The UE determines / selects N CMRs (1 < N <= K) from K CMRs based on the best N L1-RSRPs of the resource setting for CM within the resource setting group. Next, the UE determines / selects 1 CMR from the N CMRs based on the best L1-SINR of the first / second (or last) / all resource settings of IM within the resource setting group.

[0233] [Option 3-2]

[0234] The UE determines / selects N CMRs (1 < N <= K) from K CMRs based on the best N L1-SINRs of the first / second (or last) / all resource settings of IM within the resource setting group. Next, based on the best L1-RSRP of the resource setting for CM within the resource setting group, 1 CMR is determined / selected from the N CMRs.

[0235] Fig.15 It is a diagram showing the setting of the CSI-RS resource in Proposal 5-1-2. Fig.15 Corresponding to the above Scenario 1. The relationship between each resource setting group, each resource setting, and the CSI report setting is the same as Figure 1 , Fig. 9 , Fig.13 . In addition, the relationship between the channel measurement resource set (CMR set) and the interference measurement resource set (IMR set) and each resource setting is the same as Figure 1 , Fig. 9 , Fig.13 .

[0236] Next, refer to Fig.15 Examples of the above options 1, 2, 3-1, and 3-2 are described.

[0237] [Example of Option 1]

[0238] The UE selects CSI-RS resource #1 based on the best L1-SINR among resource configuration #1 / resource configuration #2 / resource configuration #1 and resource configuration #2 (corresponding to options 1-1 / 1-2 / 1-3). The UE then calculates / derives the reported CSI based on CSI-RS resource #1.

[0239] [Example of Option 2]

[0240] The UE selects CSI-RS resource #1 based on the best L1-RSRP of resource configuration #0. The UE then calculates / derives the reported CSI based on CSI-RS resource #1.

[0241] [Example of Option 3-1]

[0242] The UE selects CSI-RS resource #1 and CSI-RS resource #2 based on the best L1-RSRP of resource configuration #0. Then, the UE selects CSI-RS resource #1 from CSI-RS resource #1 and CSI-RS resource #2 based on the best L1-SINR of resource configuration #1 / resource configuration #2 / resource configuration #1 and resource configuration #2 (the first / second (or last) / all resource configurations of IM in the resource configuration group). Then, the UE calculates / derives the reported CSI based on CSI-RS resource #1.

[0243] [Example of Option 3-2]

[0244] The UE selects CSI-RS resource #1 and CSI-RS resource #2 based on the most suitable L1-SINR of resource configuration #1 / resource configuration #2 / resource configuration #1 and resource configuration #2 (the first / second (or last) / all resource configurations of the IM within the resource configuration group). Then, the UE selects CSI-RS resource #1 from CSI-RS resource #1 and CSI-RS resource #2 based on the most suitable L1-RSRP of resource configuration #0. The UE calculates / derives the reported CSI based on CSI-RS resource #1.

[0245] (Proposal 5-1-3)

[0246] Proposal 5-1-3 is applied to independent CSI reporting. The UE may not report multiple CSIs corresponding to different CMRs in the CSI reporting configuration (it may not anticipate / assume reporting).

[0247] In addition, as an option of Proposal 5-1-3, the content of replacing the "resource setting group" of the option of Proposal 5-1-2 with "CSI report setting" is applied.

[0248] Fig.16 This is a diagram showing the configuration of CSI-RS resources in Proposal 5-1-3. Fig.16 In this case, a CSI report configuration group (TRP) is associated with a CSI report configuration. Fig.15 different. Fig.16 This corresponds to the above assumption 3. The example of option 1, the example of option 2, the example of option 3-1, and the example of option 3-2 in proposal 5-1-2 are the same as Fig.16 This also corresponds to and can be applied as an example of Proposal 5-1-3.

[0249] [Method 5-2]

[0250] The UE may also determine the number of CSI (e.g., RI / PMI / CQI, etc.) to be reported corresponding to the CSI reporting configuration based on the specification according to the higher layer signaling (explicit RRC configuration indicating the number of CSI to be reported). In method 5-2, regarding the selection method of CMR and IMR, the UE may also apply proposals 5-1-1, 5-1-2, and 5-1-3.

[0251] When the number of reported CSIs is set to be less than the number of implicitly derived CSIs (for example, the number of CSIs determined using method 5-1), the UE may further select CSI from the selected CSIs based on option 1 or 2 below (or may narrow the selection range).

[0252] [Option 1]

[0253] The UE selects the CSI associated with the CMR in the first / last resource configuration for IM (the resource configuration having the lowest / highest ID).

[0254] [Option 2]

[0255] The UE selects the CSI associated with the lowest / highest L1-SINR.

[0256] Fig.17 This is a diagram showing an example of RRC settings in method 5-2. Fig.17 The "nrofReportedRS-r17" shown indicates the number of reported CSI. The UE may also Fig.17 The value of "nrofReportedRS-r17" shown determines the amount of CSI reported corresponding to the CSI reporting configuration.

[0257] <Modification>

[0258] The UE may also determine the number of CSI (RI / PMI / CQI, etc.) reported corresponding to the CSI reporting setting based on the number of resource settings specified by parameters related to channel measurement resources (CMR) in higher-layer signaling (e.g., RRC parameter "resourcesForChannelMeasurement").

[0259] In order to report multiple CSIs within a resource configuration group (in the case of joint CSI reporting) or within a CSI reporting configuration (in the case of independent CSI reporting), the following configuration may also be applied.

[0260] In the case of joint CSI reporting, multiple resource settings for channel measurement are set in each resource setting group, and multiple resource settings for interference measurement are set in each resource setting group. The number of resource settings for channel measurement is the same as the number of resource settings for interference measurement in the same resource setting group. In addition, the CMRs in each resource setting for channel measurement in the same resource setting group are the same.

[0261] Fig.18 FIG. 4 is a diagram showing the configuration of CSI-RS resources in the case of joint CSI reporting in a modified example. Fig.18 In each resource setting group, the number of resource settings for channel measurement is 2 (#0, #1), and the number of resource settings for interference measurement in the same resource setting group is also 2 (#2, #3), which is the same. In addition, the CMRs in each resource setting (#0, #1) for channel measurement in the same resource setting group are the same.

[0262] In the case of independent CSI reporting, multiple resource settings for channel measurement are set according to each CSI report setting, and multiple resource settings for interference measurement are set according to each CSI report setting. The number of resource settings for channel measurement is the same as the number of resource settings for interference measurement in the same CSI report setting. The CMRs in each resource setting for channel measurement in the same CSI report setting are the same.

[0263] Fig.19 FIG. 1 is a diagram showing the configuration of CSI-RS resources in the case of independent CSI reporting in a modified example. Fig.19 In the example, the number of resource settings for channel measurement is 2 (#0, #1), and the number of resource settings for interference measurement in the same resource setting group is also 2 (#2, #3), which are the same. The CMRs in each resource setting (#0, #1) for channel measurement in the same CSI report setting are the same.

[0264] In addition, Proposals 5-1-1, 5-1-2, and 5-1-3 regarding the method of selecting CMR and IMR can also be applied in combination with the method of this variation.

[0265] According to the fifth embodiment, the method of determining the number of CSIs to be reported or the method of selecting CMR / IMR for CSI reporting becomes clear, and the above-mentioned problem 5 can be solved.

[0266] (Wireless Communication System)

[0267] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above-described embodiments of the present disclosure.

[0268] Fig. 20 1 is a diagram showing an example of a schematic structure of a wireless communication system according to an embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), and the like.

[0269] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA))) and NR (E-UTRA-NR Dual Connectivity (E-UTRA-NR Dual Connectivity (EN-DC))), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

[0270] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (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.

[0271] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0272] The wireless communication system 1 may also include: a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in 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 in at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.

[0273] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0274] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). 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 below 6 GHz (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to this. For example, FR1 may also correspond to a frequency band higher than FR2.

[0275] Furthermore, in each CC, the user terminal 20 may communicate using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0276] Multiple base stations 10 may also be connected by wire (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station may also be referred to as an IAB node.

[0277] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0278] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0279] In the wireless communication system 1, a wireless access method based on orthogonal frequency division multiplexing (OFDM) may 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. may be used.

[0280] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be applied to the UL and DL radio access schemes.

[0281] As downlink channels, in the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)) and the like can also be used.

[0282] In addition, as uplink channels, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH))), an uplink control channel (Physical Uplink Control Channel (PUCCH))), a random access channel (Physical Random Access Channel (PRACH)) shared by each user terminal 20, etc. can also be used.

[0283] The PDSCH is used to transmit user data, high-layer control information, system information block (SIB), etc. The PUSCH is also used to transmit user data, high-layer control information, etc. In addition, the PBCH is also used to transmit the master information block (MIB).

[0284] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0285] In addition, the DCI for scheduling PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, PDSCH may also be interpreted as DL data, and PUSCH may also be interpreted as UL data.

[0286] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of 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.

[0287] A search space may also correspond to PDCCH candidates that are consistent with one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be interchangeable.

[0288] The PUCCH may also be used to transmit at least one uplink control information (uplink control information (UCI)) including channel state information (CSI), delivery confirmation information (e.g., may also be called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (Scheduling Request (SR)). The random access preamble code used to establish a connection with a cell may also be transmitted through the PRACH.

[0289] In the present disclosure, downlink, uplink, etc. may be expressed without "link". In addition, various channels may be expressed without "Physical" at the beginning.

[0290] 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 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.

[0291] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as an SS / PBCH block, SS block (SS Block (SSB)), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0292] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0293] (Base Station)

[0294] Fig.211 is a diagram showing an example of a structure of a base station involved in one embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may be provided with more than one.

[0295] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0296] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which the present disclosure relates.

[0297] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control 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 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of wireless resources, etc.

[0298] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0299] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0300] The transmitting / receiving antenna 130 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, for example, an array antenna.

[0301] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0302] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0303] The sending and receiving unit 120 (sending processing unit 1211), for example, may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0304] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filtering, discrete Fourier transform (DFT)) processing (as needed), inverse fast Fourier transform (IFFT)) processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0305] The transmitting and receiving unit 120 (RF unit 122 ) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0306] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may perform amplification, filtering, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0307] The sending and receiving unit 120 (receiving processing unit 1212) can also apply analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filtering processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0308] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (Radio Resource Management (RRM)) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (Received Signal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0309] The transmission path interface 140 can also send and receive signals (return signaling) between devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0310] In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmitting and receiving unit 120 , the transmitting and receiving antenna 130 , and the transmission path interface 140 .

[0311] In addition, the transmitting and receiving unit 120 may also send at least one setting of a zero power channel state information reference signal (ZP-CSI-RS) resource and a non-zero power channel state information reference signal (NZP-CSI-RS) resource to multiple transmitting and receiving points. The transmitting and receiving unit 120 may also receive at least one of a periodic channel state information (CSI) report, a semi-persistent CSI report, and an aperiodic CSI report including a result of interference measurement based on the setting.

[0312] The transmission and reception unit 120 may also transmit the settings of multiple interference measurement resources (IMRs) and multiple channel measurement resources (CMRs) for multiple transmission and reception points. The control unit 110 may also control the IMRs and CMRs of the quasi-co-location (QCL) set for one of the multiple transmission and reception points.

[0313] The transmitting and receiving unit 120 may also transmit, through higher layer signaling, a designation used in determining the number of channel state information (CSI) to be reported corresponding to the CSI reporting configuration. The transmitting and receiving unit 120 may also receive a CSI report corresponding to the determined number of CSI.

[0314] (User Terminal)

[0315] Fig. 22 The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. In addition, the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may be provided in one or more pieces.

[0316] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also assumed that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0317] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which the present disclosure relates.

[0318] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transmission and reception unit 220 and the transmission and 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 and reception unit 220.

[0319] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0320] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0321] The transmitting / receiving antenna 230 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0322] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0323] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0324] The sending and receiving unit 220 (sending processing unit 2211) can also perform packet data convergence protocol (PDCP) layer processing, radio link control (RLC) layer processing (for example, RLC retransmission control), medium access control (MAC) layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0325] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filtering, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0326] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is activated (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0327] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0328] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may perform amplification, filtering, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230 .

[0329] The sending and receiving unit 220 (receiving processing unit 2212) can also apply analog-to-digital conversion, FFT processing, IDFT processing (as needed), filtering processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0330] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0331] In addition, the transmitting unit and the receiving unit of the user terminal 20 of the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0332] In addition, the transmitting and receiving unit 220 may also receive at least one of a zero power channel state information reference signal (ZP-CSI-RS) resource and a non-zero power channel state information reference signal (NZP-CSI-RS) resource set for multiple transmitting and receiving points. The control unit 210 may also control interference measurement based on at least one of the received periodic channel state information (CSI) report, semi-persistent CSI report, and aperiodic CSI report.

[0333] The interference measurement may also be based only on the ZP-CSI-RS. The NZP-CSI-RS resource for channel measurement of one of the multiple transmission and reception points and the ZP-CSI-RS resource for interference measurement of the other transmission and reception points of the multiple transmission and reception points may also be set so as not to overlap.

[0334] The transmission and reception unit 220 may receive from a plurality of interference measurement resources (IMRs) and a plurality of channel measurement resources (CMRs) set for a plurality of transmission and reception points. The control unit 210 may also assume that the IMR and CMR set for one of the plurality of transmission and reception points are quasi co-located (QCL).

[0335] The CMR and the IMR may also be configured for one resource configuration group. The CMR and the IMR may also be configured for one CSI report. In interference measurement for the plurality of transmission and reception points, the total received power of the IMR may also correspond to interference and noise.

[0336] The control unit 210 may also determine the number of CSIs reported corresponding to the channel state information (CSI) report setting based on the designation according to the higher layer signaling. The transmitting and receiving unit 220 may also send a CSI report corresponding to the determined number of CSIs. The designation according to the higher layer signaling may also indicate the number of CSIs.

[0337] The control unit 210 may also determine the number of CSIs based on the number of resource settings specified by the parameters related to the interference measurement resources in the higher layer signaling. The control unit 210 may also determine the number of CSIs based on the number of resource settings specified by the parameters related to the channel measurement resources in the higher layer signaling.

[0338] (Hardware Structure)

[0339] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. 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 can be implemented by a device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly (for example, by wired, wireless, etc.) connected and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0340] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method is not particularly limited.

[0341] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.23 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0342] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. are interchangeable. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0343] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0344] The functions of the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0345] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), the sending and receiving unit 120 (220), etc. may also be implemented by the processor 1001.

[0346] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that enables a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be implemented for other functional blocks.

[0347] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other 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 executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0348] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disk, a Blu-ray (registered trademark) disk, a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0349] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (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, at least a part of the above-mentioned control unit 120 (220), the transmitting and receiving unit 130 (230), etc. may also be implemented by the processor 1004. The transmitting and receiving unit 120 (220) may also be installed by physically or logically separating the transmitting unit and the receiving unit.

[0350] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0351] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or different buses may be used between the devices.

[0352] 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 the hardware may also be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented by at least one of these hardware.

[0353] (Variation Example)

[0354] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may also be replaced with each other. In addition, a signal may also be a message. In addition, a signal may also be a message. A reference signal (ReferenceSignal) may also be referred to as RS, and may also be referred to as a pilot (Pilot), a pilot signal, etc., depending on 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.

[0355] A wireless frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a wireless 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) that is not dependent on a parameter set (numerology).

[0356] Here, the parameter set may also refer to a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of the subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, wireless frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, etc.

[0357] 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 a parameter set.

[0358] 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 fewer 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 a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0359] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be interchangeable.

[0360] For example, a subframe may also be referred to as a TTI, a plurality of consecutive subframes may also be referred to as a TTI, and a time slot or a mini time slot may also be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may also be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0361] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0362] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may also be shorter than the TTI.

[0363] In addition, when one time slot or one mini time slot is referred to as TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) may also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling may also be controlled.

[0364] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0365] In addition, long TTI (e.g., normal TTI, subframe, etc.) can also be interpreted as a TTI with a time length exceeding 1 ms, and short TTI (e.g., shortened TTI, etc.) can also be interpreted as a TTI with a TTI length less than that of long TTI and greater than 1 ms.

[0366] 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 also be the same regardless of the parameter set, for example, 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0367] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks, respectively.

[0368] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0369] In addition, a resource block may also be composed of one or more resource elements (RE). For example, one RE may also be a radio resource region of one subcarrier and one symbol.

[0370] A Bandwidth Part (BWP) (also referred to as a partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, a common RB may also be identified by an index of the RB relative to a common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0371] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured in one carrier.

[0372] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive a specific signal / channel other than the activated BWP. In addition, "cell", "carrier" and the like in the present disclosure may also be interpreted as "BWP".

[0373] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe 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 subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0374] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0375] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. In addition, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not limiting in all respects.

[0376] Information, signals, etc. described in the present disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0377] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0378] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0379] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present 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))), high-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.

[0380] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (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, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0381] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0382] The determination can be made by a value represented by a bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a specific value).

[0383] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0384] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0385] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0386] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0387] In the present disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro cell, and pico cell.

[0388] A base station can accommodate one or more (for example, 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 smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0389] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” are used interchangeably.

[0390] In some cases, the mobile station is also referred to as a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a hand set, a user agent, a mobile client, a client, or some other appropriate terminology.

[0391] 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. In addition, at least one of the base station and the mobile station may also be a device carried in a mobile body, a mobile body, etc. The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous driving vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing 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.

[0392] In addition, the base station in the present disclosure can also be interpreted as a user terminal. For example, the various methods / implementations of the present disclosure can also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it can also be called device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the user terminal 20 has the functions of the above-mentioned base station 10. In addition, expressions such as "uplink" and "downlink" can also be interpreted as expressions corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can also be interpreted as side channels.

[0393] Likewise, the user terminal in the present disclosure may also be interpreted as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0394] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node according to the circumstances. Obviously, in a network including one or more network nodes having a base station, various actions performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, Mobility Management Entity (MME)), Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0395] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, sequences, flow charts, etc. of the various methods / implementations described in this disclosure may be reversed in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0396] The various modes and embodiments described in the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), 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, and next-generation systems expanded based on them. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0397] The term “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the term “based on” means both “based only on” and “based at least on”.

[0398] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to a first and a second element does not mean that only two elements can be used, or that the first element must take precedence over the second element in some form.

[0399] The term "determining" as used in this disclosure may include a variety of actions in some cases. For example, "determining" may also be viewed as "judging", calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), ascertaining, etc.

[0400] In addition, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on receiving (for example, receiving information), transmitting (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc.

[0401] In addition, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on some actions.

[0402] In addition, "judgment (decision)" can also be interpreted as "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0403] The terms "connected", "coupled", or all their variations used in this disclosure mean all direct or indirect connections or combinations between two or more elements, and may include the situation where there are one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The combination or connection between the elements may be physical, logical, or a combination of these. For example, "connection" may also be interpreted as "access".

[0404] In the present disclosure, when two elements are connected, it can be considered that they are "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0405] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same manner as "different".

[0406] In the present disclosure, when the terms "include", "including", and their variations are used, these terms, like the term "comprising", have an inclusive meaning. Furthermore, the term "or" used in the present disclosure does not mean an exclusive OR.

[0407] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0408] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the present invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: A control unit, which determines the number of reported CSI-RS resource indicators CRI, rank indicators RI, precoding matrix indicators PMI, and channel quality indicators CQI based on the designation indicating the number of reported CSI according to the higher layer signaling; and A sending unit sends a CSI report including the CRI, the RI, the PMI and the CQI.

2. The terminal according to claim 1, wherein: The sending unit sends the CSI report based on the CSI report setting corresponding to the two resource groups.

3. A wireless communication method of a terminal, comprising: A step of determining the number of reported CSI-RS resource indicators CRI, rank indicators RI, precoding matrix indicators PMI, and channel quality indicators CQI based on a designation according to higher layer signaling indicating the number of reported CSIs; and The step of sending a CSI report including the CRI, the RI, the PMI and the CQI.

4. A base station, comprising: a transmitting unit, transmitting, by high layer signaling, a designation used in determining the number of reported CSI-RS resource indicators CRI, rank indicators RI, precoding matrix indicators PMI, and channel quality indicators CQI, the designation indicating the number of reported CSI; and A receiving unit receives a CSI report including the CRI, the RI, the PMI and the CQI.

5. A system comprising a terminal and a base station, The base station has: a transmitting unit, which transmits, by high-layer signaling, a designation used in determining the number of reported CSI-RS resource indicators CRI, rank indicators RI, precoding matrix indicators PMI, and channel quality indicators CQI, the designation indicating the number of reported CSI, The terminal has: A control unit, which determines the number of the CRI, the RI, the PMI, and the CQI to be reported based on the designation according to the higher layer signaling; and A sending unit sends a CSI report including the CRI, the RI, the PMI and the CQI.

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