Terminal, wireless communication method, base station, and system

Abstract

A terminal according to one embodiment of this disclosure includes: a reception unit that receives a Channel State Information (CSI) report configuration relating to a joint CSI report; and a control unit that determines the number of CSI parameters to be reported per CSI report pair, on the basis of the information included in the CSI report configuration, and that performs control to include the CSI report pair in the joint CSI report. According to one embodiment of this disclosure, CSI can be appropriately measured and reported even if MTRP is used.

Description

Technical Field

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

Background Art

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

[0003] Successor systems to LTE (for example, also referred to as 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 considered.

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In NR, it has been considered that one or more transmission / reception points (TRPs) (multi-TRP (MTRP)) perform DL transmission to a user terminal (UE). Also, it has been considered that the UE performs UL transmission to one or more TRPs.

[0006] However, in the conventional NR specifications such as Rel.15, since MTRP is not considered, it is not clear how to measure and report CSI when MTRP is used. If the measurement and reporting of CSI are not performed appropriately, there is a risk that the system performance will deteriorate, such as a decrease in throughput.

[0007] Therefore, one object of the present disclosure is to provide a terminal and a wireless communication method capable of appropriately measuring and reporting CSI even when MTRP is used. 、 Base station and the system is one of the purposes.

Means for Solving the Problems

[0008] A terminal according to an aspect of the present disclosure includes a receiving unit that receives a CSI report setting indicating that both channel state information (CSI) for a single transmission / reception point (STRP) and CSI for a multi-TRP (MTRP) are to be reported, and a control unit that controls a CSI report based on settings for one or two CSIs for the STRP included in the CSI report setting and a setting for one CSI report pair for the MTRP. and the control unit performs the control when supporting both the CSI for the STRP and the CSI for the MTRP in one CSI report for one CSI report setting .

Advantages of the Invention

[0009] According to one aspect of the present disclosure, even when MTRP is used, CSI measurement and reporting can be appropriately performed.

Brief Description of Drawings

[0010]

Figure 1

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Embodiments for Carrying Out the Invention

[0011] (CSI reporting (CSI report or reporting)) In Release 15 NR, a terminal (also referred to as a user terminal, User Equipment (UE), etc.) generates (also referred to as determines, calculates, estimates, measures, etc.) channel state information (CSI) based on a reference signal (RS) (or a resource for the RS), and transmits (also referred to as reports, feedbacks, etc.) the generated CSI to a network (e.g., a base station). The CSI may be transmitted to the base station using, for example, an uplink control channel (e.g., Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (e.g., Physical Uplink Shared Channel (PUSCH)).

[0012] The RS used for generating the CSI may be at least one of, for example, 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.

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

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

[0015] The UE may receive information related to CSI reporting (report configuration information) and control CSI reporting based on the report configuration information. The report configuration information may be, for example, the "CSI-ReportConfig" of an Information Element (IE) of Radio Resource Control (RRC). Note that in the present disclosure, the RRC IE may be mutually read as an RRC parameter, a higher layer parameter, or the like.

[0016] The report configuration information (for example, the "CSI-ReportConfig" of the RRC IE) may include, for example, at least one of the following. · Information related to the type of CSI reporting (report type information, for example, the "reportConfigType" of the RRC IE) · Information regarding one or more quantities of CSI to be reported (one or more CSI parameters) (reported quantity information, e.g., "reportQuantity" of RRC IE) · Information regarding the RS resources used for generating the quantity (the CSI parameter) (resource information, e.g., "CSI-ResourceConfigId" of RRC IE) · Information regarding the frequency domain for which CSI reporting is targeted (frequency domain information, e.g., "reportFreqConfiguration" of RRC IE)

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

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

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

[0020] In addition, the frequency domain information may indicate the frequency granularity of the CSI report. The frequency granularity may include, for example, wideband and subbands. The wideband is the entire CSI reporting band. The wideband may be, for example, the entire certain carrier (Component Carrier (CC), cell, serving cell), or the entire Bandwidth part (BWP) within a certain carrier. The wideband may be referred to as the CSI reporting band, the entire CSI reporting band, etc.

[0021] In addition, the subband is a part within the wideband and may be composed of one or more Resource Blocks (RB or Physical Resource Block (PRB)). The size of the subband may be determined according to the size of the BWP (number of PRBs).

[0022] The frequency domain information may indicate which PMI of the wideband or subband is to be reported (the frequency domain information may include, for example, the "pmi-FormatIndicator" of the RRC IE used for the determination of either wideband PMI report or subband PMI report). The UE may determine the frequency granularity of the CSI report (i.e., either wideband PMI report or subband PMI report) based on at least one of the above reporting amount information and frequency domain information.

[0023] When the wideband PMI report is set (determined), one wideband PMI may be reported for the entire CSI reporting band. On the other hand, when the subband PMI report is set, a single wideband indication i 1is reported for the entire CSI reporting band, and a subband indication i for each of one or more subbands within the entire CSI report 2 (e.g., a subband indication for each subband) may be reported.

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

[0025] The PMI may indicate a precoder matrix (simply referred to as a precoder) that the UE considers appropriate for use in downlink (DL) transmission to the UE. Each value of the PMI may correspond to one precoder matrix. A set of values of the PMI may correspond to a set of different precoder matrices called a precoder codebook (simply referred to as a codebook).

[0026] In the space domain, the CSI report may include one or more types of CSI. For example, the CSI may include at least one of a first type (type 1 CSI) used for single beam selection and a second type (type 2 CSI) used for multi-beam selection. A single beam may be referred to as a single layer, and a multi-beam may be referred to as a plurality of beams. Also, type 1 CSI may not assume multi-user multiple input multiple outpiut (MIMO), and type 2 CSI may assume multi-user MIMO.

[0027] The above codebook may include a codebook for type 1 CSI (also referred to as a type 1 codebook, etc.) and a codebook for type 2 CSI (also referred to as a type 2 codebook, etc.). Also, type 1 CSI may include type 1 single panel CSI and type 1 multi-panel CSI, and different codebooks (type 1 single panel codebook, type 1 multi-panel codebook) may be defined respectively.

[0028] In the present disclosure, type 1 and type I may be read as each other. In the present disclosure, type 2 and type II may be read as each other.

[0029] The uplink control information (UCI) type may include at least one of Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), scheduling request (SR), and CSI. UCI may be carried by PUCCH or may be carried by PUSCH.

[0030] In Rel.15 NR, UCI can include one CSI part for wideband PMI feedback. CSI report #n includes PMI wideband information if reported.

[0031] In Rel.15 NR, 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 some subband PMI information. CSI part 1 and CSI part 2 are separately coded.

[0032] In Rel.15 NR, the UE has N (N≥1) CSI report setting report settings and M (M≥1) CSI resource setting resource settings set by the upper layer. For example, as shown in FIG. 1, the CSI report setting (CSI-ReportConfig) includes a resource setting for channel measurement (resourcesForChannelMeasurement), a CSI-IM resource setting for interference (csi-IM-ResourceForInterference), a NZP-CSI-RS setting for interference (nzp-CSI-RS-ResourceForInterference), a report quantity (reportQuantity), etc. Each of the resource setting for channel measurement, the CSI-IM resource setting for interference, and the NZP-CSI-RS setting for interference is associated with a CSI resource setting (CSI-ResourceConfig, CSI-ResourceConfigId). The CSI resource setting includes a list of CSI-RS resource sets (csi-RS-ResourceSetList, for example, a NZP-CSI-RS resource set or a CSI-IM resource set).

[0033] If interference measurement is performed in CSI-IM, each CSI-RS resource for channel measurement is associated with a CSI-IM resource for each resource, in the order of the CSI-RS resource and the CSI-IM resource in the corresponding resource set. The number of CSI-RS resources for channel measurement is equal to the number of CSI-IM resources.

[0034] That is, for interference measurement based on CSI-IM, the channel measurement resource (CMR) and the interference measurement resource (IMR) are in a one-to-one mapping.

[0035] If the UE is configured with a CSI reporting configuration having a reporting quantity (higher layer parameter reportQuantity) set to 'cri-RSRP', 'cri-RI-PMI-CQI', 'cri-RI-i1', 'cri-RI-i1-CQI', 'cri-RI-CQI', or 'cri-RI-LI-PMI-CQI', and there are K S (K S (K > 1) resources configured within the corresponding resource set for channel measurement, the UE derives CSI parameters other than the CRI conditional on the reported CRI. CSI k (k≧0) corresponds to the (k + 1)-th entry of the associated NZP-CSI-RS resource (nzp-CSI-RSResource) within the corresponding NZP-CSI-RS resource set (nzp-CSI-RS-ResourceSet) for channel measurement, and, if configured, the (k + 1)-th entry of the associated CSI-IM resource (csi-IM-Resource) within the CSI-IM resource set (csi-IM-ResourceSet).

[0036] That is, CSI k corresponds to the (k + 1)-th configured CMR and the (k + 1)-th configured IMR.

[0037] For both FR1 and FR2, the evaluation and specification of CSI reporting for DL multi-TRP and multi-panel transmissions for at least one of the NCJT are being considered to enable more dynamic channel / interference hypotheses for NCJT.

[0038] (Multi-TRP) In NR, it is being considered that one or more Transmission / Reception Points (TRPs) (multi TRP (MTRP)) perform DL transmission to the UE using one or more panels (multi-panel). Also, it is being considered that the UE performs UL transmission to one or more TRPs using one or more panels.

[0039] Note that a plurality of TRPs may correspond to the same cell identifier (cell Identifier (ID)), or may correspond to different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0040] FIG. 2 is a diagram showing an example of a multi-TRP scenario. In these examples, it is assumed that each TRP and UE can utilize two different beams, but it is not limited thereto.

[0041] The multi-TRP (TRP#1, #2) is connected by an ideal / non-ideal backhaul, and information, data, etc. may be exchanged. Different code words (Code Word (CW)) and different layers may be transmitted from each TRP of the multi-TRP. As a form of multi-TRP transmission, Non-Coherent Joint Transmission (NCJT) may be used.

[0042] In NCJT, for example, TRP1 modulates and maps the first code word, layer-maps it, and transmits the first PDSCH with the first number of layers (e.g., 2 layers) using the first precoding. Also, TRP2 modulates and maps the second code word, layer-maps it, and transmits the second PDSCH with the second number of layers (e.g., 2 layers) using the second precoding.

[0043] Note that a plurality of PDSCHs (multi-PDSCHs) subject to NCJT may be defined to partially or completely overlap in at least one of the time and frequency domains. That is, the first PDSCH from the first TRP and the second PDSCH from the second TRP may overlap in at least one of the time and frequency resources.

[0044] These first PDSCH and second PDSCH may be assumed to be not quasi-co-located. The reception of multiple PDSCH may be interpreted as the simultaneous reception of PDSCH that is not of a certain QCL type (e.g., QCL type D).

[0045] The UE receives multiple PDSCH (which may be referred to as multiple PDSCH) from multiple TRPs based on one or more DCI. Also, in this example, it is assumed that the UE transmits separate CSI reports (CSI reports) for each TRP for different TRPs. Such CSI feedback may be referred to as separate feedback, separate CSI feedback, etc. In the present disclosure, "separate" may be mutually interpreted as "independent".

[0046] Note that CSI feedback that transmits CSI reports for both TRPs for one TRP may be used. Such CSI feedback may be referred to as joint feedback, joint CSI feedback, etc.

[0047] In FIG. 2, the UE is configured to transmit a CSI report for TRP#1 using a certain PUCCH (PUCCH1) for TRP#1 and transmit a CSI report for TRP#2 using another PUCCH (PUCCH2) for TRP#2 (separate feedback). In the case of joint feedback, the UE transmits a CSI report for TRP#1 and a CSI report for TRP#2 for TRP#1 or #2.

[0048] According to such a multi-TRP scenario, more flexible transmission control using a good-quality channel is possible.

[0049] For multi-TRP transmission, since the CSI for multiple different TRPs is usually different, it is not clear how to measure and report the CSI for multiple different TRPs. For one TRP, the channel / interference premise changes depending on the decision (traffic) of the transmission of the surrounding TRPs.

[0050] For example, a CSI report for separate feedback (which may also be called a separate CSI report) may be configured using one CSI reporting configuration (CSI-ReportConfig) associated with one TRP.

[0051] The CSI reporting configuration may correspond to one interference premise for one TRP (that is, different CSI reporting configurations may be used for each TRP and each interference premise). The CSI reporting configuration may also correspond to multiple interference premises for one TRP (that is, different CSI reporting configurations are used for each TRP, and one CSI reporting configuration may be associated with multiple interference premises for a certain TRP).

[0052] Also, for example, a CSI report for joint feedback (which may also be called a joint CSI report) may be configured using one CSI reporting configuration (CSI-ReportConfig) associated with multiple TRPs.

[0053] The CSI report setting may correspond to one interference assumption for each of multiple TRPs (i.e., a CSI report setting that includes CSI for interference assumption #1 for TRP #1 and CSI for interference assumption #1 for TRP #2 may be set, and a CSI report that includes CSI for interference assumption #2 for TRP #1 and CSI for interference assumption #1 for TRP #2 may be set using another CSI report setting). The CSI report setting may correspond to multiple interference assumptions for each of multiple TRPs (i.e., a CSI report that includes two CSIs for interference assumptions #1 and #2 for TRP #1 and two CSIs for interference assumptions #3 and #4 for TRP #2 may be set using one CSI report setting).

[0054] Note that the CSI report setting for the joint CSI report may include resource settings for each TRP (at least one of a resource setting for channel measurement, a CSI-IM resource setting for interference, and an NZP-CSI-RS setting for interference). The resource setting of a certain TRP may be included in a resource setting group and set.

[0055] Note that the resource setting group may be identified by a resource setting group index to be set. The resource setting group may be interchangeable with the report group. The resource setting group index (which may simply be called the group index) may represent a CSI report related to a 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 may correspond to TRP #i.

[0056] The CSI report setting for the separate CSI report may be referred to as a separate CSI report setting, a separate CSI setting, etc. The CSI report setting for the joint CSI report may be referred to as a joint CSI report setting, a joint CSI setting, etc.

[0057] Regarding MTRP, it is preferable that single TRP (STRP) transmission and MTRP transmission are dynamically switched according to the channel state and the like. For this purpose, the following CSI is required: · CSI for TRP1 (the first TRP) assuming STRP transmission (hereinafter also referred to as CSI_A), · CSI for TRP2 (the second TRP) assuming STRP transmission (hereinafter also referred to as CSI_B), · CSI for TRP1 considering TRP / beam interference from TRP2 assuming NCJT transmission of MTRP (hereinafter also referred to as CSI_C), · CSI for TRP2 considering TRP / beam interference from TRP1 assuming NCJT transmission of MTRP (hereinafter also referred to as CSI_D).

[0058] CSI_A and CSI_B may be separately feedback or jointly feedback. On the other hand, if CSI_C and CSI_D are separately feedback, the following problems may occur.

[0059] Problem 1 is that when the network performs NCJT transmission according to the RI and PMI reported from the UE, the total RI from the two TRPs (which may be mutually read as the number of layers, rank) may exceed the UE capability (for example, the maximum number of spatial multiplexing layers supported for DL reception (for example, indicated by the RRC parameter "maxNumberMIMO-LayersPDSCH")).

[0060] In this case, the network is required to obtain appropriate RI and PMI that satisfy the UE capability for NCJT. Alternatively, UE operations (for example, dropping PDSCH of some layers, not decoding, etc.) when the total rank from the MTRP exceeds the UE capability may be defined.

[0061] Problem 2 is that when the network performs NCJT transmission according to the RI / PMI / CQI reported by the UE, the reported inter-TRP interference may not follow the actual inter-TRP interference (in other words, the reported CSI may not be accurate enough).

[0062] In this case, the network is required to obtain CSI for better-suited NCJT according to the channel state.

[0063] To address these problems, it is being considered to set both a CSI reporting setting for separate CSI reports (separate CSI reporting setting) and a CSI reporting setting for joint CSI reports (joint CSI reporting setting) for the UE.

[0064] Note that the separate CSI report may be used to report at least one of CSI_A and CSI_B described above. The joint CSI report may be used to report at least one of CSI_C and CSI_D described above.

[0065] Figure 3 is a diagram showing an example of the separate CSI reporting setting and the joint CSI reporting setting. In this example, the UE has simultaneously set CSI reporting settings #1 and #2 for the separate CSI report and CSI reporting setting #3 for the joint CSI report.

[0066] For example, CSI reporting setting #1 may correspond to CSI_A for TRP1, and CSI reporting setting #2 may correspond to CSI_B for TRP2. CSI reporting setting #3 may correspond to CSI_C and CSI_D for the MTRP.

[0067] Note that for the joint CSI report, it may be assumed that the rank of the first CSI (RI) or the sum of the ranks of the first and second CSIs (RI) does not exceed a certain value.

[0068] The separate CSI report configuration may include information indicating that the CSI report configuration relates to separate CSI feedback, and the joint CSI report configuration may include information indicating that the CSI report configuration relates to joint CSI feedback.

[0069] However, as shown in FIG. 3, when setting the separate CSI report configuration and the joint CSI report configuration using different CSI report configurations, in order to enable CSI feedback for S-TRP transmission and M-TRP transmission, it is necessary to set at least three CSI report configurations in the UE, resulting in a large communication overhead.

[0070] Also, in the example of FIG. 3, only the mDCI-based MTRP transmission scheme is assumed for CSI feedback. On the other hand, in Rel.16 NR, other transmission schemes such as sDCI-based MTRP and SDM 1a are introduced, and it is being considered to introduce yet another transmission scheme such as Single Frequency Network (SFN) in Rel.17. It is desirable that CSI feedback can also support these transmission schemes. Note that SDM 1a is one of the schemes in which the PDSCH transmitted from each TRP is space division multiplexed (SDM).

[0071] If these problems are not addressed, it may not be possible to appropriately report CSI in the case of MTRP, leading to a potential decrease in throughput or degradation of communication quality.

[0072] Therefore, the inventors have conceived a method for performing suitable CSI measurement and reporting even when using MTRP.

[0073] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The wireless communication methods according to the respective embodiments may be applied individually or in combination.

[0074] In the present disclosure, "A / B" and "at least one of A and B" may be read interchangeably with each other.

[0075] In the present disclosure, activate, deactivate, indicate (or specify), select, configure, update, determine, etc. may be read interchangeably with each other.

[0076] In the present disclosure, RRC, RRC parameter, RRC message, upper layer parameter, information element (IE), configuration may be read interchangeably with each other. In the present disclosure, MAC CE, update command, activation / deactivation command may be read interchangeably with each other. In the present disclosure, support, control, be able to control, operate, be able to operate may be read interchangeably with each other.

[0077] In the present disclosure, panel, beam, panel group, beam group, Uplink (UL) transmission entity, TRP, spatial relation information (SRI), spatial relation, control resource set (COntrol REsource SET (CORESET)), Physical Downlink Shared Channel (PDSCH), codeword, base station, predetermined antenna port (e.g., Demodulation Reference Signal (DMRS) port), predetermined antenna port group (e.g., DMRS port group), predetermined group (e.g., Code Division Multiplexing (CDM) group, predetermined reference signal group, CORESET group), predetermined resource (e.g., predetermined reference signal resource), predetermined resource set (e.g., predetermined reference signal resource set), CORESET pool, PUCCH group (PUCCH resource group), spatial relation group, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, QCL, etc. may be read interchangeably with each other.

[0078] Also, the TCI state Identifier (ID) and the TCI state may be interchangeable with each other. The TCI state and the TCI may be interchangeable with each other.

[0079] In the present disclosure, an index, an ID, an indicator, a resource ID may be interchangeable with each other. In the present disclosure, a sequence, a list, a set, a group, a cluster, a subset, etc. may be interchangeable with each other.

[0080] In the present disclosure, the TRP index, the CORESET pool index (CORESETPoolIndex), the pool index, the group index, the CSI report setting group index, the CSI report group index, the CSI report setting index, the CSI report setting group index, the resource setting group index may be interchangeable with each other.

[0081] In the present disclosure, the resource setting for channel measurement, the resource for channel measurement, resourcesForChannelMeasurement may be interchangeable with each other. In the present disclosure, the CSI-IM resource setting for interference, the CSI-IM based resource for interference measurement, csi-IM-ResourceForInterference, the resource for interference measurement may be interchangeable with each other. In the present disclosure, the NZP-CSI-RS resource setting for interference, the NZP-CSI-RS based resource for interference measurement, nzp-CSI-RS-ResourcesForInterference, the resource for interference measurement may be interchangeable with each other.

[0082] In the present disclosure, the CSI report, the CSI report setting, the CSI setting, the resource setting, etc. may be interchangeable with each other.

[0083] In the present disclosure, a single PDCCH (DCI) may be referred to as a PDCCH (DCI) of a first scheduling type (e.g., scheduling type A (or type 1)). Also, a multi-PDCCH (DCI) may be referred to as a PDCCH (DCI) of a second scheduling type (e.g., scheduling type B (or type 2)).

[0084] In the present disclosure, for a single DCI, the i-th TRP (TRP#i) may mean the i-th TCI state, the i-th CDM group, etc. (i is an integer). For multi-DCI, the i-th TRP (TRP#i) may mean the CORESET corresponding to CORESET pool index = i, the i-th TCI state, the i-th CDM group, etc. (i is an integer).

[0085] In the present disclosure, a single PDCCH may be assumed to be supported when multi-TRP utilizes an ideal backhaul. A multi-PDCCH may be assumed to be supported when the multi-TRP uses a non-ideal backhaul.

[0086] Note that the ideal backhaul may also be referred to as DMRS port group type 1, reference signal related group type 1, antenna port group type 1, CORESET pool type 1, etc. The non-ideal backhaul may also be referred to as DMRS port group type 2, reference signal related group type 2, antenna port group type 2, CORESET pool type 2, etc. The names are not limited to these.

[0087] In the present disclosure, multi-TRP (MTRP), multi-TRP system, multi-TRP transmission, multi-PDSCH may be read interchangeably with each other.

[0088] In the present disclosure, single DCI (sDCI), single PDCCH, a multi-TRP system based on single DCI, sDCI-based MTRP, activation of two TCI states on at least one TCI code point may be read interchangeably with each other.

[0089] In the present disclosure, multi DCI (mDCI), multi PDCCH, a multi-TRP system based on multi DCI, mDCI-based MTRP, setting of two CORESET pool indexes or CORESET pool index = 1 (or a value of 1 or more) may be read interchangeably with each other.

[0090] (Wireless communication method) <First Embodiment> The first embodiment relates to CSI reporting settings that can support different transmission schemes such as mDCI-based MTRP, sDCI-based MTRP, SDM 1a, and SFN.

[0091] The CSI reporting settings for joint CSI feedback may include an RRC parameter indicating the number of CSI parameters (CSI elements) to be reported for each CSI reporting pair included in the CSI report. In the present disclosure, the CSI reporting pair may be read interchangeably with CSI pair, two CSIs, etc.

[0092] The RRC parameter may be reportQuantity. The RRC parameter may indicate the CSI to be reported for all CSI pairs included in the CSI report.

[0093] The above CSI parameters may be, for example, RI / LI / PMI / CQI. The number of RI / LI / PMI / CQI may determine the transmission scheme or, conversely, may be determined by the transmission scheme.

[0094] For example, for mDCI-based MTRP, the UE may be configured to report two RIs, two LIs, two PMIs, and two CQIs for each CSI reporting pair. Note that the reporting of the LI may be omitted.

[0095] For sDCI-based MTRP, the UE may be configured to report two RIs, two LIs, two PMIs, and one CQI for each CSI reporting pair. Note that the reporting of the LI may be omitted.

[0096] For SDM 1a, the UE may be configured to report one RI, two PMIs, and one CQI for each CSI reporting pair.

[0097] For SFN, the UE may be configured to report one RI, one PMI, and one CQI for each CSI reporting pair.

[0098] Note that when deriving one RI / one CQI for a CSI reporting pair, it is preferable for the UE to measure CRI_C and CRI_D simultaneously.

[0099] Here, in the present disclosure, the CSI parameters corresponding to CSI_A, B, C, and D are represented by appending "_A", "_B", "_C", and "_D" to the end respectively (for example, the RI corresponding to CSI_C is represented as RI_C).

[0100] The number of CSI reporting pairs per CSI report may be one or more, and may be predefined by the specification, or may be set in relation to the CSI reporting configuration by RRC. The number of CSI reporting pairs may also be the number of CRIs for the CSI report (for example, the number of CRIs set may be assumed to be the number of CSI reporting pairs).

[0101] When the number of CSI reporting pairs per CSI report is more than one, the number of RIs / LIs / PMIs / CQIs per configured CSI reporting pair may be commonly applied to each pair.

[0102] The CSI report pair may be set only for the CSI report setting for the CSI for the MTRP (which may also be referred to as the MTRP CSI). The CSI for the STRP (which may also be referred to as the STRP CSI, fallback CSI, etc.) may be obtained from other CSI report settings.

[0103] FIG. 4 is a diagram showing an example of a CSI report setting that can support different transmission schemes in the first embodiment. The illustrated CSI report setting (CSI-ReportConfig) is for joint CSI feedback, and it is assumed that the CSI report of this CSI report setting includes various CSIs for at least the CSI pair of {CSI_C, CSI_D}.

[0104] Four examples of the content of the CSI report that can be set by this CSI report setting are shown in FIG. 4. The top example is a CSI report including {CRI_C, RI_C, PMI_C, CQI_C, CRI_D, RI_D, PMI_D, CQI_D}, which is preferable for the mDCI-based MTRP.

[0105] The second example is a CSI report including {CRI_C, RI_C, PMI_C, CRI_D, RI_D, PMI_D, CQI}, which is preferable for the sDCI-based MTRP.

[0106] The third example is a CSI report including {CRI_C, CRI_D, RI, PMI_C, PMI_D, CQI}, which is preferable for SDM 1a.

[0107] The fourth example is a CSI report including {CRI_C, CRI_D, RI, PMI, CQI}, which is preferable for the SFN.

[0108] Note that the order of the CSI parameters within each CSI report shown in FIG. 4 is not limited to these.

[0109] According to the first embodiment described above, the UE can appropriately report CSI reports suitable for different transmission schemes based on the CSI report setting.

[0110] <Second Embodiment> The second embodiment relates to a method of making the CSI report setting correspond to both fallback CSI and MTRP CSI.

[0111] Fallback CSI, MTRP CSI, etc. may also be referred to as CSI type, CSI report type, etc.

[0112] The UE may be set / activated / notified to report both fallback CSI and MTRP CSI in a certain CSI report setting by upper layer signaling (e.g., RRC, MAC CE), physical layer signaling (e.g., DCI), or a combination thereof.

[0113] The fallback CSI may be determined to be only one CSI for one TRP (not changeable in the setting). This one CSI may be selected by the UE or determined based on a specific rule. For example, this one CSI may be a CSI corresponding to at least one of the minimum TRP, the minimum CORESET pool index, the minimum TCI state ID, the minimum CSI report setting index.

[0114] In the present disclosure, "minimum" may be mutually read as "maximum", "highest", "lowest", "the i-th (i is an integer, e.g., 1, 2,...)", etc. In the present disclosure, "small" and "large" may be mutually read.

[0115] The fallback CSI may be determined to be two CSIs for each of the two TRPs (not changeable in the setting).

[0116] The fallback CSI may be set by RRC to be either one CSI for one TRP or two CSIs for each of two TRPs.

[0117] The fallback CSI may be set by RRC to up to M CSIs per TRP.

[0118] The fallback CSI may be set by RRC to up to a total of M CSIs for the STRP.

[0119] The MTRP CSI may be fixed to one CSI report pair for the MTRP (not changeable by configuration).

[0120] The MTRP CSI may be set by RRC to up to N CSI report pairs for the MTRP.

[0121] FIG. 5 is a diagram showing an example of CSI report configuration in the second embodiment. The illustrated CSI report configuration (CSI-ReportConfig) is the CSI report configuration for both the STRP CSI and the MTRP CSI.

[0122] FIG. 5 illustrates two examples of the content of the CSI report that can be set by this CSI report configuration. The top example is a CSI report including CSI_A for S-TRP#1, CSI_B for S-TRP#2, the CSI pair {CSI_C, CSI_D} for the MTRP, and another CSI pair {CSI_E, CSI_F} for the MTRP. Note that {CSI_E, CSI_F} may mean that it is information equivalent to {CSI_C, CSI_D} but is different data (a CSI pair including different CSI parameters).

[0123] The second example is a CSI report including CSI_A for S-TRP#1 and the CSI pair {CSI_C, CSI_D} for the MTRP. It is suitable when you want to know in detail only about TRP#1 with a relatively small amount of data.

[0124] According to the second embodiment described above, an increase in the overhead of CSI report settings can be suitably suppressed.

[0125] <Third Embodiment> The third embodiment relates to a method of making the CSI report setting correspond to both fallback CSI and MTRP CSI.

[0126] The UE may determine to report either fallback CSI or MTRP CSI in a certain CSI report setting based on upper layer signaling (e.g., RRC, MAC CE), physical layer signaling (e.g., DCI), or a combination thereof.

[0127] When the UE reports either fallback CSI or MTRP CSI in a certain CSI report setting, in order for the base station to decode the CSI related to the CSI report setting, the base station may perform blind detection of the number of bits of this CSI from the candidates that can be considered.

[0128] When the UE reports either fallback CSI or MTRP CSI in a certain CSI report setting, in order for the base station to decode the CSI related to the CSI report setting, the base station may determine whether the CSI is fallback CSI or MTRP CSI based on an explicit instruction in the CSI (CSI report).

[0129] For example, a certain bit field included in the CSI report (which may be called a CSI report type field, etc.) may indicate whether the CSI report is fallback CSI or MTRP CSI. When the CSI report type field is 1 bit, for example, if the value is 1, it may indicate MTRP CSI, and if the value is 0, it may indicate fallback CSI.

[0130] The payload size of the CSI report may be the same whether the CSI report is fallback CSI or MTRP CSI. When the CSI report is fallback CSI, since the actual payload size of the fallback CSI is smaller than the payload size of the MTRP CSI, bits of '0' (or '1') may be added (padded) to make it the same as the payload size of the MTRP CSI.

[0131] MTRP CSI may be separated into two parts (CSI part 1 and part 2). CSI part 1 and part 2 may have a different configuration from the existing CSI part 1 and part 2. CSI part 1 may have the same size as the fallback CSI and may include an indication of whether CSI part 2 exists. When CSI part 2 exists, the CSI part 2 constitutes the remaining MTRP CSI, and when CSI part 2 does not exist, it may mean that the CSI report is fallback CSI.

[0132] Note that the indication of whether CSI part 2 exists may be an indication of the size of CSI part 2 (for example, if it is a positive value, it is the size, and if it is a value of 0 or less, it indicates that there is no CSI part 2).

[0133] When the UE reports either fallback CSI or MTRP CSI in a certain CSI reporting setting, in order for the base station to decode the CSI related to the CSI reporting setting, the base station may determine whether the CSI is fallback CSI or MTRP CSI based on the implicit indication in the CSI (CSI report).

[0134] For example, whether the CSI report is fallback CSI or MTRP CSI may be associated with the size of the CSI report, the size or value of the content included in the CSI report, etc.

[0135] Whether a CSI report is fallback CSI or MTRP CSI may be based on the number of reported CRIs or the payload size of the CSI report. For example, a CSI report with the number of reported CRIs being 1 may be fallback CSI, and a CSI report with the number of reported CRIs being 2 may be MTRP CSI. A CSI report with a payload size of A or less (A is an integer, for example) may be fallback CSI, and a CSI report with a payload size of B (B > A) may be MTRP CSI.

[0136] Whether a CSI report is fallback CSI or MTRP CSI may be based on the values within one CSI pair. For example, for a CSI pair having a reporting format of {CRI_C, CRI_D}, if the value of RI is 0, it may mean fallback CSI. The remaining LI / PMI / CQI for RI = 0 may not need to be reported.

[0137] In this case, the payload size of the CSI report may be the same for fallback CSI and MTRP CSI, and fallback CSI may use the same reporting format of the CSI pair as MTRP. Some values may be valid only for fallback CSI, and some other values may be valid only for MTRP CSI.

[0138] In the third embodiment, the number of fallback CSI or MTRP CSI to be reported in one CSI report may be the same as the number of fallback CSI or MTRP CSI per CSI reporting setting in the second embodiment.

[0139] According to the third embodiment described above, an increase in the overhead of the CSI report can be preferably suppressed.

[0140] <Variations of the Second and Third Embodiments> Whether both fallback CSI and MTRP CSI are reported in a certain CSI report setting may be specified to the UE based on a specific field of DCI (or a specific code point corresponding to the specific field).

[0141] For example, the specific field may be a TCI field indicating a TCI state. The specific code point may be the minimum or maximum code point. Note that the above DCI corresponding to the specific code point may be sDCI.

[0142] When the minimum or maximum code point of the TCI field indicates one TCI state, the UE may assume that only fallback CSI is reported in a certain CSI report setting.

[0143] When the minimum or maximum code point of the TCI field indicates two TCI states, the UE may assume that both fallback CSI and MTRP CSI are reported in a certain CSI report setting.

[0144] <Others> At least one of the above embodiments may be applied only to a UE that has reported a specific UE capability or supports the specific UE capability.

[0145] The specific UE capability may indicate at least one of the following: · Whether to support reporting of multiple CSI pairs for MTRP in one CSI report for one CSI report setting, · Whether to support that different numbers of RI / LI / PMI / CQI are set for one reported CSI pair, · Whether to support both STRP CSI and MTRP CSI in one CSI report for one CSI report setting, · The maximum number of supported STRP CSI reported in one CSI report, · The maximum number of supported MTRP CSIs reported in one CSI report, · Whether to support the UE's selection between STRP CSI and MTRP CSI in one CSI report for one CSI reporting configuration, · Whether to support an explicit (or implicit) indication for differentiating between STRP CSI and MTRP CSI in one CSI report.

[0146] Also, at least one of the above-described embodiments may be applied when the UE is configured with specific information related to the above-described embodiments by upper layer signaling. For example, the specific information may be information indicating activation of MTRP / sDCI-based MTRP / mDCI-based MTRP, any RRC parameters for a specific release (e.g., Rel. 17), and the like.

[0147] Note that in the above-described embodiments, the case of reporting one or more CSI pairs in one CSI report for one CSI reporting configuration has been described, but it is not limited thereto. For example, the content of the above-described embodiments may be applied to a case where a plurality of CSI reports for a plurality of CSI reporting configurations are associated (linked) for a plurality of TRPs (in other words, for different TRPs respectively). In this case, the plurality (described as 2 below) of linked CSI reporting configurations may be regarded as a configuration pair (which may also be called a CSI configuration pair). The UE may report two CSI reports regarding two TRPs based on the configuration pair.

[0148] The CSI report pair in the above-described embodiments may be read as two linked CSI reporting configurations (or configuration pairs) here.

[0149] According to the first embodiment described above, the number of reported RI / LI / PMI / CQIs for each CSI configuration pair may be specified.

[0150] According to the above-described second embodiment, for each CSI report setting within the CSI setting pair, it may be set / activated / notified to report both the fallback CSI and the MTRP CSI. For example, the CSI report for CSI report setting #1 may include CSI_A and CSI_C for TRP1, and the CSI report for CSI report setting #2 may include CSI_B and CSI_D for TRP2.

[0151] These CSI_C and CSI_D may be CSI for MTRP joint transmission. When the UE selects to report CSI_C and CSI_D, it may select CRI_C (CMR for TRP1) in CSI_C as the IMR for CSI_D, and select CRI_D (CMR for TRP2) in CSI_D as the IMR for CSI_C.

[0152] According to the above-described third embodiment, for each CSI report setting, it may be determined to report either the fallback CSI or the MTRP CSI. However, it is preferable that the UE's determination regarding the CSI report settings within the CSI setting pair be the same. For example, two linked CSI report settings may both be determined to be related to the fallback CSI or both be determined to be related to the MTRP CSI.

[0153] (Wireless Communication System) Hereinafter, the configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above-described embodiments of the present disclosure.

[0154] FIG. 6 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by the Third Generation Partnership Project (3GPP).

[0155] Further, the wireless communication system 1 may support dual connectivity (multi-RAT dual connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0156] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the Master Node (MN), and the base station (gNB) of NR is the Secondary Node (SN). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0157] The wireless communication system 1 may support dual connectivity between a plurality of base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both the MN and the SN are base stations (gNBs) of NR).

[0158] The wireless communication system 1 may 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 disposed within the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and the user terminal 20 are not limited to the modes 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.

[0159] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) and dual connectivity (DC) using a plurality of component carriers (CCs).

[0160] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, or the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub - 6 GHz), and FR2 may be a frequency band higher than 24 GHz (above - 24 GHz). Note that the frequency bands, definitions, etc. of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

[0161] Also, the user terminal 20 may communicate using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0162] The plurality of base stations 10 may be connected by wire (e.g., an optical fiber compliant with Common Public Radio Interface (CPRI), an X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the upper-level station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0163] The base station 10 may be connected to the core network 30 via another base station 10 or directly. The core network 30 may include at least one of, for example, Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0164] The user terminal 20 may be a terminal corresponding to at least one of communication methods such as LTE, LTE-A, 5G, etc.

[0165] In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM)-based wireless access method 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.

[0166] The wireless access method may also be referred to as a waveform. In the wireless communication system 1, other wireless access methods (for example, other single-carrier transmission methods, other multi-carrier transmission methods) may be used for the UL and DL wireless access methods.

[0167] In the wireless communication system 1, as a downlink channel, a Physical Downlink Shared Channel (PDSCH) shared by each user terminal 20, a Physical Broadcast Channel (PBCH), a Physical Downlink Control Channel (PDCCH), etc. may be used.

[0168] Also, in the wireless communication system 1, as an uplink channel, a Physical Uplink Shared Channel (PUSCH) shared by each user terminal 20, a Physical Uplink Control Channel (PUCCH), a Physical Random Access Channel (PRACH), etc. may be used.

[0169] User data, upper layer control information, a System Information Block (SIB), etc. are transmitted by the PDSCH. User data, upper layer control information, etc. may be transmitted by the PUSCH. Also, a Master Information Block (MIB) may be transmitted by the PBCH.

[0170] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, downlink control information (DCI) including scheduling information for at least one of the PDSCH and the PUSCH.

[0171] Note that the DCI for scheduling PDSCH may be referred to as DL assignment, DL DCI, etc., and the DCI for scheduling PUSCH may be referred to as UL grant, UL DCI, etc. Note that PDSCH may be read as DL data, and PUSCH may be read as UL data.

[0172] For the detection of PDCCH, a control resource set (COntrol REsource SET (CORESET)) and a search space may be used. CORESET corresponds to the resource for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0173] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the "search space", "search space set", "search space configuration", "search space set configuration", "CORESET", "CORESET configuration", etc. in the present disclosure may be read as each other.

[0174] The Physical Uplink Control Channel (PUCCH) may be used to transmit Uplink Control Information (UCI) including at least one of Channel State Information (CSI), transmission confirmation information (which may be referred to as Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR). The Physical Random Access Channel (PRACH) may be used to transmit a random access preamble for establishing a connection with a cell.

[0175] In the present disclosure, the downlink and uplink may be expressed without the word "link". Also, the various channels may be expressed without the word "Physical" at the beginning.

[0176] In the wireless communication system 1, a Synchronization Signal (SS), a Downlink Reference Signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a Cell-specific Reference Signal (CRS), a Channel State Information Reference Signal (CSI-RS), a DeModulation Reference Signal (DMRS), a Positioning Reference Signal (PRS), a Phase Tracking Reference Signal (PTRS), etc. may be transmitted.

[0177] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), etc. Note that SS, SSB, etc. may also be referred to as reference signals.

[0178] Also, in the radio communication system 1, as an uplink reference signal (UL-RS), a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted. Note that DMRS may be referred to as a UE-specific reference signal.

[0179] (Base station) FIG. 7 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

[0180] In this example, the functional blocks of the characteristic portions in the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for radio communication. A part of the processing of each unit described below may be omitted.

[0181] The control unit 110 performs overall control of the base station 10. The control unit 110 can be composed of a controller, a control circuit, etc. described based on the common knowledge in the technical field related to the present disclosure.

[0182] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission, reception, measurement, etc. using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140. The control unit 110 may generate data, control information, a sequence, etc. to be transmitted as signals and transfer them to the transmission / reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of radio resources, etc.

[0183] The transmission / reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmission / reception unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, etc. described based on the common knowledge in the technical field related to the present disclosure.

[0184] The transmission / reception unit 120 may be configured as an integrated transmission / reception unit or may be composed of a transmission unit and a reception unit. The transmission unit may be composed of the transmission processing unit 1211 and the RF unit 122. The reception unit may be composed of the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

[0185] The transmission / reception antenna 130 may be composed of an antenna described based on the common knowledge in the technical field related to the present disclosure, such as an array antenna.

[0186] The transmission / reception unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, etc. The transmission / reception unit 120 may receive the above-described uplink channel, uplink reference signal, etc.

[0187] The transceiver unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0188] The transceiver unit 120 (transmission processing unit 1211) may perform processing of the Packet Data Convergence Protocol (PDCP) layer, processing of the Radio Link Control (RLC) layer (e.g., RLC retransmission control), processing of the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, for example, and generate a bit sequence to be transmitted.

[0189] The transceiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, discrete Fourier transform (DFT) processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, digital-to-analog conversion, etc. on the bit sequence to be transmitted, and output a baseband signal.

[0190] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the signal in the radio frequency band via the transceiver antenna 130.

[0191] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transceiver antenna 130.

[0192] The transmission / reception unit 120 (reception processing unit 1212) may apply reception processing such as analog-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and may acquire user data and the like.

[0193] The transmission / reception unit 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0194] The transmission path interface 140 may transmit and receive signals (backhaul signaling) with devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0195] Note that the transmission unit and reception unit of the base station 10 in the present disclosure may be configured by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

[0196] Note that the transmission / reception unit 120 may transmit a CSI report setting regarding a joint channel state information (Channel State Information (CSI)) report to the user terminal 20.

[0197] The transmission / reception unit 120 may receive the joint CSI report including the CSI report pair, in which the number of CSI parameters reported per CSI report pair is determined in the user terminal 20, based on the information included in the CSI report setting.

[0198] The transmission / reception unit 120 may transmit a CSI report setting indicating that at least one of the channel state information (Channel State Information (CSI)) for a single transmission / reception point (Single Transmission / Reception Point (STRP)) and the CSI for a multi-TRP (Multi TRP (MTRP)) is to be reported to the user terminal 20.

[0199] The transmission / reception unit 120 may receive a CSI report including at least one of the CSI for the STRP and the CSI for the MTRP included by the user terminal 20, based on the information included in the CSI report setting.

[0200] (User Terminal) FIG. 8 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. Note that one or more of the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may be provided.

[0201] In this example, the functional blocks of the characteristic portions in the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

[0202] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, etc. described based on the common understanding in the technical field related to the present disclosure.

[0203] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission, reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transmission / reception unit 220.

[0204] The transmission / reception unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmission / reception unit 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, etc. described based on the common understanding in the technical field related to the present disclosure.

[0205] The transmission / reception unit 220 may be configured as an integrated transmission / reception unit or may be composed of a transmission unit and a reception unit. The transmission unit may be composed of the transmission processing unit 2211 and the RF unit 222. The reception unit may be composed of the reception processing unit 2212, the RF unit 222, and the measurement unit 223.

[0206] The transmission / reception antenna 230 can be composed of an antenna described based on the common understanding in the technical field related to the present disclosure, such as an array antenna.

[0207] The transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0208] The transmitting and receiving unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0209] The transmitting and receiving unit 220 (transmission processing unit 2211) may perform processing of the PDCP layer, processing of the RLC layer (e.g., RLC retransmission control), processing of the MAC layer (e.g., HARQ retransmission control), etc. on data, control information, etc. acquired from the control unit 210, for example, and generate a bit sequence to be transmitted.

[0210] The transmitting and receiving unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, digital-to-analog conversion, etc. on the bit sequence to be transmitted, and output a baseband signal.

[0211] Whether to apply DFT processing may be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is enabled, the transmitting and receiving unit 220 (transmission processing unit 2211) may perform DFT processing as the above transmission processing to transmit the channel using the DFT-s-OFDM waveform, or if not, it may not perform DFT processing as the above transmission processing.

[0212] The transmitting and receiving unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting and receiving antenna 230.

[0213] On the other hand, the transmitting and receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting and receiving antenna 230.

[0214] The transmission / reception unit 220 (reception processing unit 2212) may perform reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing on the acquired baseband signal, and may acquire user data and the like.

[0215] The transmission / reception unit 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), reception quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0216] Note that the transmission unit and reception unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmission / reception unit 220, the transmission / reception antenna 230, and the transmission path interface 240.

[0217] Note that the transmission / reception unit 220 may receive a CSI report setting regarding a joint channel state information (Channel State Information (CSI)) report.

[0218] The control unit 210 may determine the number of CSI parameters reported per CSI report pair based on the information included in the CSI report setting, and perform control to include the CSI report pair in the joint CSI report.

[0219] Based on the information included in the CSI report setting, the control unit 210 may perform control to include the CSI report pair including two Rank Indicators (RIs), two Layer Indicators (LIs), two Precoding Matrix Indicators (PMIs), and one Channel Quality Indicator (CQI) in the joint CSI report.

[0220] Based on the information included in the CSI report setting, the control unit 210 may perform control to include the CSI report pair including one Rank Indicator (RI), two Precoding Matrix Indicators (PMIs), and one Channel Quality Indicator (CQI) in the joint CSI report.

[0221] Based on the information included in the CSI report setting, the control unit 210 may perform control to include the CSI report pair including one Rank Indicator (RI), one Precoding Matrix Indicator (PMI), and one Channel Quality Indicator (CQI) in the joint CSI report.

[0222] In addition, the transceiver unit 220 may receive a CSI report setting indicating that it reports at least one of the Channel State Information (CSI) for a Single Transmission / Reception Point (STRP) and the CSI for a Multi-TRP (MTRP).

[0223] Based on the information included in the CSI report setting, the control unit 210 may perform control to include at least one of the CSI for the STRP and the CSI for the MTRP in the CSI report.

[0224] When the control unit 210 includes only one of the CSI for the STRP and the CSI for the MTRP in the CSI report based on the information included in the CSI report setting, the CSI report may include a bit field indicating whether the CSI report is the CSI for the STRP and the CSI for the MTRP.

[0225] Regardless of whether the control unit 210 includes the CSI for the STRP or the CSI for the MTRP in the CSI report, the control unit 210 may control the CSI report so that it has the same payload size.

[0226] When the control unit 210 includes only one of the CSI for the MTRP in the CSI report based on the information included in the CSI report setting, the CSI report may be composed of a CSI part 1 consisting of a part of the CSI for the MTRP having the same payload size as the CSI for the STRP and a CSI part 2 consisting of the remaining CSI for the MTRP.

[0227] (Hardware Configuration) Note that the block diagrams used in the description of the above embodiments show blocks of functional units. These functional blocks (components) are realized by an arbitrary combination of at least one of hardware and software. Also, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically combined device, or two or more physically or logically separated devices may be directly or indirectly (e.g., using wired, wireless, etc.) connected and realized using these multiple devices. The functional block may be realized by combining software with the above one device or the above multiple devices.

[0228] Here, functions include, but are not limited to, judgment, decision-making, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection determination, establishment, comparison, assumption, expectation, regarded as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), assigning, etc. For example, a functional block (component) that enables transmission may be referred to as a transmitting unit, a transmitter, etc. In any case, as described above, the implementation method is not particularly limited.

[0229] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs the processing of the wireless communication method of the present disclosure. FIG. 9 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may physically be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0230] In the present disclosure, terms such as device, circuit, device, section, unit, etc. can be read interchangeably with each other. The hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without including some devices.

[0231] For example, although only one processor 1001 is shown in the figure, there may be a plurality of processors. Also, the processing may be executed by one processor, or the processing may be executed by two or more processors simultaneously, sequentially, or using other methods. Note that the processor 1001 may be implemented by one or more chips.

[0232] Each function in the base station 10 and the user terminal 20 is realized, for example, by causing a predetermined software (program) to be loaded onto hardware such as a processor 1001 and a memory 1002, and the processor 1001 performs operations, controls communication via a communication device 1004, or controls at least one of reading and writing data in the memory 1002 and a storage 1003.

[0233] The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be constituted by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like. For example, at least a part of the above-described control unit 110 (210), transmission / reception unit 120 (220), and the like may be realized by the processor 1001.

[0234] Also, the processor 1001 reads a program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program for causing a computer to execute at least a part of the operations described in the above embodiments is used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and the same may be true for other functional blocks.

[0235] Memory 1002 is a computer-readable recording medium and may be composed of, for example, at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other suitable storage media. Memory 1002 may be referred to as a register, cache, main memory (main storage device), etc. Memory 1002 can store a program (program code), software module, etc. executable for implementing the wireless communication method according to an embodiment of the present disclosure.

[0236] Storage 1003 is a computer-readable recording medium and may be composed of, for example, at least one of a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (e.g., a compact disc (Compact Disc ROM (CD-ROM), etc.)), a digital versatile disc, a Blu-ray (registered trademark) disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and other suitable storage media. Storage 1003 may be referred to as an auxiliary storage device.

[0237] The communication device 1004 is hardware (a transceiver device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-described transceiver unit 120 (220), the transceiver antenna 130 (230), etc. may be implemented by the communication device 1004. The transceiver unit 120 (220) may be physically or logically separated and implemented by a transmission unit 120a (220a) and a reception unit 120b (220b).

[0238] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an external input. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs an output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (e.g., a touch panel).

[0239] Also, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or may be configured using different buses for each device.

[0240] In addition, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), and a Field Programmable Gate Array (FPGA), and part or all of each functional block may be realized using such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0241] (Modification example) Regarding the terms described in the present disclosure and the terms necessary for understanding the present disclosure, they may be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be read interchangeably with each other. Also, a signal may be a message. A reference signal may also be abbreviated as RS and may be called a Pilot, a pilot signal, etc. depending on the applicable standard. Also, a Component Carrier (CC) may be called a cell, a frequency carrier, a carrier frequency, etc.

[0242] The radio frame may be composed of one or a plurality of periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may be called a subframe. Further, the subframe may be composed of one or a plurality of slots in the time domain. The subframe may have a fixed time length (e.g., 1 ms) that does not depend on numerology.

[0243] Here, the new numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. The new numerology may indicate, for example, at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering process performed by a transceiver in the frequency domain, specific windowing process performed by a transceiver in the time domain, etc.

[0244] A slot may be composed of one or more symbols (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. Also, a slot may be a time unit based on the new numerology.

[0245] A slot may include a plurality of mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. Also, a mini-slot may be called a sub-slot. A mini-slot may be composed of a smaller number of symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may be called a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be called a PDSCH (PUSCH) mapping type B.

[0246] A radio frame, sub-frame, slot, mini-slot, and symbol all represent time units for signal transmission. Different names may be used for the radio frame, sub-frame, slot, mini-slot, and symbol respectively. Note that the time units such as frame, sub-frame, slot, mini-slot, and symbol in this disclosure may be read interchangeably with each other.

[0247] For example, 1 sub-frame may be called a TTI, or a plurality of consecutive sub-frames may be called a TTI, or 1 slot or 1 mini-slot may be called a TTI. That is, at least one of the sub-frame and the TTI may be the sub-frame (1 ms) in the existing LTE, or a period shorter than 1 ms (for example, 1 - 13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, mini-slot, etc. instead of a sub-frame.

[0248] Here, the TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, the base station performs scheduling to allocate radio resources (such as the frequency bandwidth and transmission power that can be used at each user terminal) to each user terminal in TTI units. Note that the definition of the TTI is not limited to this.

[0249] The TTI may be a transmission time unit for a channel-coded data packet (transport block), code block, codeword, etc., or may be a processing unit for scheduling, link adaptation, etc. Note that when the TTI is given, the time interval (for example, the number of symbols) in which the transport block, code block, codeword, etc. are actually mapped may be shorter than the TTI.

[0250] In addition, when one slot or one mini-slot is called a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum time unit for scheduling. Also, the number of slots (number of mini-slots) constituting the minimum time unit for the scheduling may be controlled.

[0251] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

[0252] Note that a long TTI (e.g., a normal TTI, a subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be read as a TTI having a TTI length less than that of a long TTI and equal to or more than 1 ms.

[0253] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and in the frequency domain, it may include one or a plurality of consecutive subcarriers. The number of subcarriers included in an RB may be the same regardless of the numerology, for example, it may be 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0254] Also, an RB may include one or a plurality of symbols in the time domain, and may have a length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. may each be constituted by one or a plurality of resource blocks.

[0255] Note that one or more RBs may be referred to as a Physical Resource Block (PRB), a Sub-Carrier Group (SCG), a Resource Element Group (REG), a PRB pair, an RB pair, etc.

[0256] Also, a resource block may be composed of one or more Resource Elements (REs). For example, 1 RE may be a radio resource region of 1 sub-carrier and 1 symbol.

[0257] A Bandwidth Part (BWP) (which may also be called a partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (common RBs) for a certain numerology in a certain carrier. Here, the common RB may be specified by the index of the RB based on the common reference point of the carrier. The PRB is defined in a certain BWP and may be numbered within the BWP.

[0258] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be set within one carrier for a UE.

[0259] At least one of the set BWPs may be active, and the UE may not be assumed to transmit and receive a predetermined signal / channel outside the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be read as "BWP".

[0260] Note that the structures such as the above-described radio frames, sub-frames, slots, mini-slots, and symbols are merely examples. For example, the number of sub-frames included in a radio frame, the number of slots per sub-frame or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of sub-carriers included in an RB, and the number of symbols, symbol length, cyclic prefix (CP) length, etc. within a TTI can be changed in various ways.

[0261] Also, the information, parameters, etc. described in the present disclosure may be represented using absolute values, relative values from a predetermined value, or using corresponding other information. For example, a radio resource may be indicated by a predetermined index.

[0262] The names used for parameters, etc. in the present disclosure are not limiting names in any way. Furthermore, mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Since various channels (such as PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, the various names assigned to these various channels and information elements are not limiting names in any way.

[0263] The information, signals, etc. described in the present disclosure may be represented using any of various different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0264] Also, information, signals, etc. may be output from at least one of the upper layer to the lower layer and from the lower layer to the upper layer. Information, signals, etc. may be input and output via a plurality of network nodes.

[0265] The input / output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. The information, signals, etc. to be input / output may be overwritten, updated, or appended. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.

[0266] The notification of information is not limited to the aspects / embodiments described in the present disclosure and may be performed using other methods. For example, the notification of information in the present disclosure may be implemented by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or combinations thereof.

[0267] Note that physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Also, RRC signaling may also be referred to as an RRC message and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. Further, MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0268] Also, the notification of predetermined information (e.g., the notification of "being X") is not limited to explicit notification and may be performed implicitly (e.g., by not performing the notification of the predetermined information or by the notification of another piece of information).

[0269] The determination may be made based on a value represented by 1 bit (either 0 or 1), or a boolean value represented by true or false, or a numerical comparison (e.g., comparison with a predetermined value).

[0270] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc., whether called software, firmware, middleware, microcode, a hardware description language, or by some other name.

[0271] Also, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, when software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technologies (such as infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of the transmission medium.

[0272] The terms "system" and "network" used in this disclosure may be used interchangeably. "Network" may mean the devices (e.g., base stations) included in the network.

[0273] 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", "panel", etc. can be used interchangeably.

[0274] In the present disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. can be used interchangeably. The base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0275] A base station can accommodate one or more (e.g., three) cells. When the base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides communication services in this coverage.

[0276] In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", and "terminal" can be used interchangeably.

[0277] A mobile station may also be called 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 handset, a user agent, a mobile client, a client, or some other appropriate term.

[0278] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), a moving body that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanoid or unmanned). Note that at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0279] In addition, the base station in the present disclosure may be replaced by a user terminal. For example, for a configuration in which communication between the base station and the user terminal is replaced by communication between a plurality of user terminals (which may be referred to as, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.), each aspect / embodiment of the present disclosure may be applied. In this case, the functions of the base station 10 described above may be configured to be functions of the user terminal 20. Also, terms such as "uplink" and "downlink" may be replaced with terms corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may be replaced with a side channel.

[0280] Similarly, the user terminal in the present disclosure may be replaced by a base station. In this case, the functions of the user terminal 20 described above may be configured to be functions of the base station 10.

[0281] In the present disclosure, operations assumed to be performed by the base station may, in some cases, be performed by its upper node. In a network including one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, Mobility Management Entity (MME), Serving-Gateway (S-GW), etc., but not limited thereto), or a combination thereof.

[0282] Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched during execution. Also, the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be rearranged as long as there is no contradiction. For example, for the methods described in the present disclosure, the elements of various steps are presented using an exemplary order and are not limited to the specific order presented.

[0283] Each aspect / embodiment described in the present disclosure may be applied to systems using Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (x is, 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), other suitable wireless communication methods, and next-generation systems extended based on these. Further, a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G) may be applied.

[0284] As used in the present disclosure, the description "based on" does not mean "based only on" unless otherwise specified. In other words, the description "based on" means both "based only on" and "based at least on".

[0285] Any reference to an element using terms such as "first", "second", etc. used in this disclosure does not generally limit the quantity or order of those elements. These terms may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, a reference to a first and a second element does not mean that only two elements may be employed or that the first element must precede the second element in any way.

[0286] The term "determining" as used in this disclosure may encompass a wide variety of operations. For example, "determining" may be considered to be "judging", "calculating", "computing", "processing", "deriving", "investigating", "looking up, search, inquiry" (e.g., searching in a table, database, or another data structure), "ascertaining", etc.

[0287] Also, "determining" may be considered to be "receiving" (e.g., receiving information), "transmitting" (e.g., transmitting information), "input", "output", "accessing" (e.g., accessing data in a memory), etc.

[0288] Also, "determining" may be considered to be "resolving", "selecting", "choosing", "establishing", "comparing", etc. That is, "determining" may be considered to be making any operation.

[0289] Also, "determination" may be read as "assuming", "expecting", "considering", etc.

[0290] The "maximum transmit power" described in this disclosure may mean the maximum value of the transmit power, or may mean the nominal UE maximum transmit power, or may mean the rated UE maximum transmit power.

[0291] As used in this disclosure, the terms "connected" and "coupled", or any variations thereof, mean any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "accessed".

[0292] In this disclosure, when two elements are connected, it can be considered that they are "connected" or "coupled" to each other using one or more wires, cables, printed electrical connections, etc., and also, as some non-limiting and non-exhaustive examples, using electromagnetic energy having wavelengths in the radio frequency region, microwave region, optical (both visible and invisible) region, etc.

[0293] In this disclosure, the term "A and B are different" may mean that "A and B are different from each other". Note that the term may also mean that "A and B are each different from C". Terms such as "separate" and "coupled" may also be interpreted in the same way as "different".

[0294] In the present disclosure, when terms such as "include", "including" and their variants are used, these terms are intended to be inclusive, similar to the term "comprising". Further, the term "or" used in the present disclosure is not intended to be an exclusive disjunction.

[0295] In the present disclosure, for example, when articles are added by translation, as in the case of a, an and the in English, the present disclosure may include that the nouns following these articles are in the plural form.

[0296] As described above, the invention according to the present disclosure has been described in detail. However, it is obvious to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented in modified and changed forms without departing from the spirit and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for illustrative purposes and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. a receiving unit that receives a CSI reporting setting indicating reporting of both channel state information (CSI) for a single transmission / reception point (Single Transmission / Reception Point (STRP)) and CSI for a multi-TRP (Multi TRP (MTRP)); a control unit that controls a CSI report based on settings for one or two CSIs for STRP included in the CSI reporting setting and settings for one CSI reporting pair for MTRP; The terminal in which the control unit performs the control when supporting both the CSI for STRP and the CSI for MTRP in one CSI report for one CSI reporting setting.

2. The terminal according to claim 1, wherein the control unit controls to include the CSI reporting pair including two rank indicators (Rank Indicator (RI)), two layer indicators (Layer Indicator (LI)), two precoding matrix indicators (Precoding Matrix Indicator (PMI)), and one channel quality indicator (Channel Quality Indicator (CQI)) in the CSI report based on information included in the CSI reporting setting.

3. receiving a CSI reporting setting indicating reporting of both channel state information (CSI) for a single transmission / reception point (Single Transmission / Reception Point (STRP)) and CSI for a multi-TRP (Multi TRP (MTRP)); controlling a CSI report based on settings for one or two CSIs for STRP included in the CSI reporting setting and settings for one CSI reporting pair for MTRP; A wireless communication method of a terminal in which the terminal performs the control when supporting both the CSI for STRP and the CSI for MTRP in one CSI report for one CSI reporting setting.

4. A transmitting unit that transmits to a terminal a CSI reporting setting indicating to report both channel state information (CSI) for a single transmission / reception point (Single Transmission / Reception Point (STRP)) and CSI for a multi-TRP (Multi TRP (MTRP)). A receiving unit that receives from the terminal a CSI report controlled based on settings for one or two CSIs for the STRP included in the CSI reporting setting and settings for one CSI reporting pair for the MTRP. The receiving unit is a base station that receives the CSI report when supporting both the CSI for the STRP and the CSI for the MTRP in one CSI report for one CSI reporting setting.

5. A system having a terminal and a base station, wherein the terminal has a receiving unit that receives a CSI reporting setting indicating to report both channel state information (CSI) for a single transmission / reception point (Single Transmission / Reception Point (STRP)) and CSI for a multi-TRP (Multi TRP (MTRP)), and a control unit that controls a CSI report based on settings for one or two CSIs for the STRP included in the CSI reporting setting and settings for one CSI reporting pair for the MTRP, wherein the control unit performs the control when supporting both the CSI for the STRP and the CSI for the MTRP in one CSI report for one CSI reporting setting, wherein the base station has a transmitting unit that transmits the CSI reporting setting to the terminal, and a receiving unit that receives the CSI report from the terminal.

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