Terminal, base station, system, and wireless communication method

Abstract

A terminal according to one embodiment of the present disclosure is provided with: a control unit which, when a plurality of transmission / reception points are used, instructs an independent feedback to a plurality of control resource set pool indices (CORESET pool indices), and transmits the independent feedback to a plurality of control resource set pool indices (CORESET pool indices); and discarding the CSI report associated with the maximum CORESET pool index when the values of the CSI priorities of a plurality of channel state information reports (CSI reports) associated with different CORESET pool indexes and used for generating conflicts are different; and a transmission unit that transmits one of the plurality of CSI reports that is not discarded.

Description

[0001] This application is a divisional application of the following patent application: the application date is March 27, 2020, the application number is 202080098882.3, and the name of the invention is "Terminal, wireless communication method and base station". Technical Field

[0002] The present disclosure relates to a terminal, a wireless communication method, and a base station in a next-generation mobile communication system. Background Art

[0003] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) is standardized for the purpose of further high-speed data rate, low latency, etc. (Non-patent document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) is standardized for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0004] Successor systems of LTE (also called, for example, fifth generation mobile communication system (5G), 5G+(plus), sixth generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.) are also being studied.

[0005] Prior art literature

[0006] Non-patent literature

[0007] Non-patent document 1: 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the invention

[0008] Problems to be solved by the invention

[0009] In NR, the user terminal (User Equipment (UE)) measures the channel state based on the resources of reference signals such as the Channel State Information Reference Signal (CSI-RS) and feeds back (reports) the Channel State Information (CSI) to the network (e.g., base station).

[0010] In addition, in NR, one or more transmission reception points (Transmission / Reception Point (TRP)) (multi TRP (M-TRP)) are studied using one or more panels (multi-panels) to perform DL transmissions to the UE. In addition, the UE is studying using one or more panels to perform UL transmissions to one or more TRPs.

[0011] However, in the NR specifications to date, the control of CSI reporting when multiple panels / TRPs are used has not been fully studied. For example, what kind of uplink control channel (Physical Uplink Control Channel (PUCCH)) format is used in CSI reporting of multiple TRPs, and the discarding rules when CSI reports of multiple TRPs conflict, etc., have not been studied. If these are not clearly defined, CSI reporting cannot be properly performed in the case of multiple TRPs, and there is a concern that throughput will be reduced or communication quality will deteriorate.

[0012] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately implement CSI reporting even when multiple TRPs or panels are used.

[0013] Means for solving problems

[0014] A terminal involved in one method of the present disclosure comprises: a control unit, which determines a first PUCCH resource corresponding to a specific CSI report when multiple uplink control channel (Physical Uplink Control Channel) resources, i.e., multiple PUCCH resources, are set in one time slot in order to send channel state information (Channel State Information) reports, i.e., CSI reports associated with different transmitting and receiving points, and when no list of PUCCH resources for multiple CSIs is provided or the multiple PUCCH resources do not overlap in the one time slot; and a sending unit, which sends the specific CSI report in the first PUCCH resource.

[0015] A terminal involved in one embodiment of the present disclosure comprises: a control unit, which discards a CSI report associated with a largest CORESET pool index when independent feedback for multiple control resource set pool indexes, i.e., CORESET pool indexes, is indicated when multiple transmitting and receiving points are utilized, and when the values ​​of CSI priorities of multiple channel state information reports, i.e., CSI reports, which are associated with different CORESET pool indexes and used for conflicts, are different; and a sending unit, which sends the one of the multiple CSI reports that is not discarded.

[0016] Effects of the Invention

[0017] According to one embodiment of the present disclosure, CSI reporting can be appropriately implemented even when multiple TRPs or panels are used. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 1A to 1D are diagrams showing an example of determining a PUCCH resource for sending a CSI report in Rel.15 / 16 NR.

[0019] FIG. 2 is a diagram showing an example of a multi-TRP scenario.

[0020] FIG3 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0021] FIG. 4 is a diagram showing an example of a configuration of a base station according to an embodiment.

[0022] FIG. 5 is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0023] FIG6 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION

[0024] (CSI)

[0025] In NR, the UE measures the channel state based on the resources of reference signals such as the Channel State Information Reference Signal (CSI-RS) and feeds back (reports) the Channel State Information (CSI) to the network (e.g., base station).

[0026] In addition, CSI may also include at least one of a channel quality indicator (Channel Quality Indicator (CQI)), a precoding matrix indicator (Precoding Matrix Indicator (PMI)), a CSI-RS resource indicator (CSI-RSResource Indicator (CRI)), a SS / PBCH block resource indicator (SS / PBCH Block Resource Indicator (SSBRI)), a layer indicator (Layer Indicator (LI)), a rank indicator (Rank Indicator (RI)), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), L1-SNR (Signal to Noise Ratio), etc.

[0027] As a method of feeding back CSI, periodic CSI (P-CSI) reporting, aperiodic CSI (A-CSI) reporting, semi-persistent CSI (SP-CSI) reporting, etc. are being studied.

[0028] The UE may also be notified of the CSI measurement setting information using higher layer signaling, physical layer signaling, or a combination thereof.

[0029] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0030] MAC signaling, for example, may also use MAC Control Element (MAC CE), MAC Protocol Data Unit (MAC Protocol Data Unit (PDU)), etc. Broadcast information, for example, may also be Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

[0031] The physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI)).

[0032] The CSI measurement configuration information may also be configured using, for example, the RRC information element "CSI-MeasConfig". The CSI measurement configuration information may also include CSI resource configuration information (RRC information element "CSI-ResourceConfig"), CSI report configuration information (RRC information element "CSI-ReportConfig"), etc. The CSI resource configuration information is associated with the resources used for CSI measurement, and the CSI report configuration information is associated with how the UE implements CSI reporting.

[0033] The CSI report configuration information ("CSI-ReportConfig") includes resource information for channel measurement ("resourcesForChannelMeasurement"). In addition, the CSI report configuration information may also include resource information for interference measurement (for example, non-zero power (NZP) CSI-RS resource information for interference measurement ("nzp-CSI-RS-ResourcesForInterference"), CSI-interference management (Interference Management (IM)) resource information for interference measurement ("csi-IM-ResourcesForInterference"), etc.). These resource information correspond to the ID (Identifier) ​​of the CSI resource configuration information ("CSI-ResourceConfigId").

[0034] In addition, regarding the ID of the CSI resource configuration information corresponding to each resource information (may also be referred to as CSI resource configuration ID), one or more may be the same value, or each may have a different value.

[0035] The CSI resource configuration information ("CSI-ResourceConfig") may also include a CSI resource configuration information ID, CSI-RS resource set list information ("csi-RS-ResourceSetList"), a resource type ("resourceType"), etc. The CSI-RS resource set list may also include at least one of the information of the NZP CSI-RS and SSB used for measurement ("nzp-CSI-RS-SSB"), and the CSI-IM resource set list information ("csi-IM-ResourceSetList").

[0036] The resource type indicates the time domain action of the CSI-RS resource setting, which can be set to "aperiodic", "semi-persistent", or "periodic". The corresponding CSI-RS can also be called A-CSI-RS, SP-CSI-RS, and P-CSI-RS.

[0037] In addition, the channel measurement resources may be used, for example, to calculate CQI, PMI, L1-RSRP, etc. In addition, the interference measurement resources may be used to calculate L1-SINR, L1-SNR, L1-RSRQ, and other interference-related indices.

[0038] (Priority associated with CSI reporting)

[0039] In Rel.15 / 16 NR, a CSI report (also referred to as a CSI report, CSI feedback, etc.) may also be associated with a priority value. For example, the priority value may also be associated with a priority value using the function Pri iCSI (y, k, c, s) are defined. This priority can also be replaced with CSI report priority, CSI priority, etc.

[0040] Here, y can also be a value based on the type of CSI report (A-CSI report, SP-CSI report, or P-CSI report) and the channel for sending the CSI report (uplink shared channel (Physical Uplink Shared Channel (PUSCH))) or uplink control channel (Physical Uplink Control Channel (PUCCH))).

[0041] For example, if it is an A-CSI report transmitted via PUSCH, y=0; if it is an SP-CSI report transmitted via PUSCH, y=1; if it is an SP-CSI report transmitted via PUCCH, y=2; and if it is a P-CSI report transmitted via PUCCH, y=3.

[0042] k may also be a value based on whether the CSI report includes L1-RSRP / SINR (for example, if the CSI report includes L1-RSRP / SINR, k=0, and if not, k=1). c may also be a serving cell index. s may also be a report configuration ID (reportConfigID).

[0043] For example, Pri iCSI (y, k, c, s) can also be obtained by the following formula 1.

[0044] (Formula 1)

[0045] Pri iCSI (y, k, c, s) = 2·N cells ·M s y+N cells ·M s ·k+M s ·c+s

[0046] Here, N cells It can also be the value of the maximum number of serving cells (higher layer parameter maxNrofServingCells), M s It may also be the value of the maximum number of CSI report configurations that are configured (higher layer parameter maxNrofCSI-ReportConfigurations).

[0047] In the Pri associated with the first CSI report iCSI The value of (y, k, c, s) is less than the Pri associated with the second CSI report iCSI In the case of the value of (y, k, c, s), it may also mean that the priority of the first CSI report is higher than that of the second CSI report.

[0048] (Conflict reported by CSI)

[0049] In Rel.15 / 16 NR, two CSI reports are said to collide when their time occupancy (overlap) in at least one Orthogonal Frequency Division Multiplexing (OFDM) symbol and they are sent in the same carrier.

[0050] In the case where the UE is configured to send two conflicting CSI reports, and the value of y (in terms of priority) between the two CSI reports is different, the following rule applies: the CSI report with the higher priority value is not sent by the UE, except when the value of y for one is 2 and the value of y for the other is 3. In this case, the two CSI reports may both be multiplexed or one may be dropped based on the priority value.

[0051] When multiple PUCCH resources are set in a time slot for sending a CSI report, and when a list of PUCCH resources for multiple CSIs is not provided (RRC parameter "multi-CSI-PUCCH-ResourceList") or the multiple PUCCH resources do not overlap in the one time slot, the UE determines the first resource corresponding to the CSI report with the highest priority.

[0052] Here, when the first resource includes PUCCH format 2 and there are remaining resources that do not overlap with the first resource in the above-mentioned time slot, the UE determines the CSI report with the highest priority from the CSI reports with corresponding resources from the remaining resources, and determines the corresponding second resource as an additional resource for the CSI report.

[0053] In addition, when the first resource includes PUCCH format 3 or PUCCH format 4, and there are remaining resources in the above-mentioned one time slot that do not overlap with the first resource and include PUCCH format 2, the UE determines the CSI report with the highest priority among the CSI reports with corresponding resources from the remaining resources, and determines the corresponding second resource as an additional resource for the CSI report.

[0054] When multiple PUCCH resources are set in a time slot for sending a CSI report, and when a list of PUCCH resources for multiple CSIs is provided and the multiple PUCCH resources overlap in the one time slot, the UE multiplexes all CSI reports in one resource from the resources provided by the list.

[0055] In Rel.15 / 16 NR, there are PF0 to 4 in PF (PUCCH format), but at least one of PF2, 3, and 4 for uplink control information (UCI) of more than 2 bits is used in CSI reporting. PF2 is transmitted over 1 or 2 symbols, and PF3 / 4 is transmitted over 4 or more symbols.

[0056] FIG. 1A to FIG. 1D are diagrams showing an example of determining a PUCCH resource for transmitting a CSI report in Rel. 15 / 16 NR. In this example, a case where four PUCCH resources are configured for a UE in one time slot (14 symbols) is described. The priority (highest, second highest, third highest, fourth highest) of the predetermined CSI report to be transmitted through each PUCCH resource is shown.

[0057] Figures 1A and 1B show an example where the UE is not provided with a list of PUCCH resources for multiple CSIs (and a portion of the four PUCCH resources overlap). Figures 1C and 1D show an example where the four PUCCH resources do not overlap (in this example, any group of PUCCH resources do not overlap).

[0058] The UE determines the CSI report with the highest priority and determines the PUCCH resource corresponding to the CSI report as the first resource. In FIG. 1A and FIG. 1C , the PUCCH resource of PF2 is determined as the first resource, and in FIG. 1B and FIG. 1D , the PUCCH resource of PF3 / 4 is determined as the first resource.

[0059] In the example of FIG. 1A , the UE determines the PUCCH resource corresponding to the CSI report having the highest priority (the third priority overall) among the CSI reports of resources that do not overlap with the first resources as the second resource.

[0060] In the example of FIG. 1B , the UE determines the PUCCH resource corresponding to the CSI report having the highest priority (the fourth priority overall) among the CSI reports that do not overlap with the first resources and include resources of PF2 as the second resource.

[0061] In the example of FIG. 1C , the UE determines the PUCCH resource corresponding to the CSI report having the highest priority (the second priority overall) among the CSI reports of the resources that do not overlap with the first resources as the second resource.

[0062] In the example of FIG. 1D , the UE determines the PUCCH resource corresponding to the CSI report having the highest priority (the fourth priority overall) among the CSI reports that do not overlap with the first resources and include resources of PF2 as the second resource.

[0063] The UE may also use one or both of the determined first resources and the second resources to report the CSI report.

[0064] (Multiple TRP)

[0065] In NR, one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi TRP (M-TRP)) using one or more panels (multi-panels) for DL ​​transmission to the UE is being studied. In addition, the UE is studying the use of one or more panels for UL transmission to one or more TRPs.

[0066] In addition, multiple TRPs may correspond to the same cell identifier (cell identifier (ID)) or different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0067] Figure 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 is not limited to this.

[0068] Multiple TRPs (TRP#1, #2) can also be connected through ideal / non-ideal backhaul and exchange information, data, etc. Different code words (Code Word (CW)) and different layers can also be sent from each TRP of the multiple TRPs. As a method of sending multiple TRPs, non-coherent joint transmission (NCJT) can also be used.

[0069] In NCJT, for example, TRP1 performs modulation mapping and layer mapping on the first codeword, and uses the first precoding to send the first PDSCH for the first number of layers (e.g., 2 layers). In addition, TRP2 performs modulation mapping and layer mapping on the second codeword, and uses the second precoding to send the second PDSCH for the second number of layers (e.g., 2 layers).

[0070] In addition, multiple PDSCHs (multi-PDSCHs) that are NCJTed may also be defined to partially or completely overlap with respect to at least one of the time domain and the frequency domain. That is, at least one of the time and frequency resources of the first PDSCH from the first TRP and the second PDSCH from the second TRP may also overlap.

[0071] It can also be assumed that the first PDSCH and the second PDSCH are not in a quasi-co-location (QCL) relationship (not quasi-co-located). The reception of multiple PDSCHs can also be replaced by the simultaneous reception of PDSCHs that are not of a certain QCL type (eg, QCL type D).

[0072] The UE receives multiple PDSCHs (also referred to as multiple PDSCHs) from multiple TRPs based on one or more DCIs. In addition, in this example, the UE is assumed to send different CSI reports (CSIreport) related to each TRP for different TRPs. Such CSI feedback may also be referred to as separate feedback, independent CSI feedback, etc. In addition, CSI feedback that sends CSI reports related to two TRPs for one TRP may also be referred to as joint feedback, joint CSI feedback, etc.

[0073] In FIG. 2 , the UE is configured to use a certain PUCCH (PUCCH1) for TRP#1 to send a CSI report for TRP#1, and to use another PUCCH (PUCCH2) for TRP#2 to send a CSI report for TRP#2.

[0074] Based on such a multi-TRP scenario, more flexible transmission control using channels of good quality can be performed.

[0075] However, in the NR specifications to date, the control of CSI reporting when multiple panels / TRPs are used has not been fully studied. For example, what PUCCH format is used in CSI reporting of multiple TRPs, and the discarding rules when CSI reports of multiple TRPs conflict, etc. have not been studied. If these are not clearly specified, CSI reporting cannot be properly performed in the case of multiple TRPs, and there is a concern that throughput will be reduced or communication quality will be degraded.

[0076] Therefore, the inventors of the present invention have come up with a method for appropriately performing CSI reporting. According to one method of the present disclosure, the UE can appropriately determine the CSI priority by associating it with the TRP.

[0077] In addition, in the present disclosure, “A / B” may also mean “at least one of A and B”.

[0078] In the present disclosure, a panel, an uplink (UL) transmission entity, a TRP, a spatial relationship, a control resource set (CORESET), a PDSCH, a codeword, a base station, a specific antenna port (e.g., a demodulation reference signal (DMRS)) port), a specific antenna port group (e.g., a DMRS port group), a specific group (e.g., a code division multiplexing (CDM)) group, a specific reference signal group, a CORESET group), a CORESET pool, etc. may also be replaced with each other. In addition, a TRP identifier (ID) and a TRP may also be replaced with each other.

[0079] In the present disclosure, index, ID, indicator, resource ID, etc. may also be replaced with each other. In the present disclosure, beam, TCI, TCI state, DL TCI state, UL TCI state, unified TCI state, QCL, QCL assumption, spatial relationship, spatial relationship information, precoder, etc. may also be replaced with each other.

[0080] In the present disclosure, list, group, set, subset, cluster, etc. may also be used interchangeably.

[0081] (Wireless Communication Method)

[0082] <First Embodiment>

[0083] The first embodiment relates to the PUCCH format when the UE uses independent feedback in CSI feedback (for multiple TRPs).

[0084] In addition, the “using independent feedback in CSI feedback” in the present disclosure may be replaced with “independent feedback is set as a CSI feedback mode”, “independent feedback is supported as CSI feedback”, “independent feedback is instructed”, etc.

[0085] For example, the UE may also be configured with a high-level parameter (CSIFeedbackMode) indicating a CSI feedback mode. The parameter may also include a value indicating whether to report the CSI between TRPs (multiple TRPs) together (as joint CSI feedback) (e.g., "JointFeedback"), or a value indicating to report the CSI between TRPs separately (as independent CSI feedback) (e.g., "SeparateFeedback").

[0086] A UE using independent feedback in CSI feedback may also send up to two PUCCHs containing CSI information in different symbols within a slot, and it may also be assumed that these PUCCHs are equivalent to any of the following:

[0087] (1) At least one is PUCCH format 0 or 1 (at least one is short PUCCH);

[0088] (2) Both are short PUCCHs, or one is a short PUCCH and the other is a long PUCCH, or both are long PUCCHs (in other words, the two PUCCHs may be any one of PUCCH formats 2, 3, and 4);

[0089] (3) Both are the same PUCCH format (this is because it is assumed that for multiple TRPs, the reported content / type for each TRP is the same).

[0090] In addition, the "different symbols in one time slot" here may mean that these PUCCHs do not overlap at all in time, or may mean that these PUCCHs partially overlap in time. In addition, in the present disclosure, at most two PUCCHs, or two PUCCHs may be replaced with each other.

[0091] Which of the above (1) to (3) is followed by a UE using independent feedback in CSI feedback may be pre-defined by the specification or set by a higher layer parameter.

[0092] According to the first embodiment described above, the UE can appropriately assume (judge) the PUCCH format used in independent feedback.

[0093] <Second Embodiment>

[0094] The second embodiment relates to handling of CSI conflicts for multiple CSI reports associated with different TRPs.

[0095] It can also be assumed that, when the UE configured to send a plurality of CSI reports associated with different TRPs and conflicting with each other has different CSI priority values ​​for the conflicting plurality of CSI reports, and thus when the value of y (of the priority formula) between the two CSI reports is different (which can also be referred to as the first case), except for the case where the value of y of one is 2 and the value of y of the other is 3, at least one of the following rules is applied:

[0096] (A) CSI reports with higher priority values ​​will not be sent by the UE (same as Rel.15);

[0097] (B) The CSI report associated with the largest TRP index will not be sent by the UE;

[0098] (C) The CSI report associated with the latest (most recent) PUCCH will not be sent by the UE;

[0099] (D) CSI reports with (or notifying) lower (bad) channel conditions (eg, RSRP, CQI, CSI, etc.) will not be sent by the UE.

[0100] In addition, in the present disclosure, "highest" may also be replaced with "lowest", "specific", etc. (for example, regarding the above (B)). In addition, in the present disclosure, "latest" may also be replaced with "oldest (earliest)", "specific", etc. (for example, regarding the above (C)). In addition, in the present disclosure, "lower" may also be replaced with "higher (better)", "specific", etc. (for example, regarding the above (D)). In addition, channel conditions may also be replaced with channel status, channel quality, etc.

[0101] In addition, in the present disclosure, "will not be sent by the UE" can also be replaced with "discarded".

[0102] In the case where the values ​​of y between the two CSI reports are the same, or the values ​​of y are different but the group of values ​​of y is not {2, 3} (also referred to as the second situation), similar to Rel.15, the UE can assume that the two CSI reports are multiplexed, or one of them is discarded based on the priority value, or at least one of the above rules (B)-(D) is applied.

[0103] It can also be imagined that a UE that is configured to send multiple CSI reports that are associated with different TRPs and conflict with each other is applied with at least one of the above rules (B)-(D) when the values ​​of the CSI priorities used for these multiple conflicting CSI reports are the same (which can also be referred to as the third situation). It can also be imagined that a rule depending on the implementation of the UE is applied.

[0104] In addition, for each of the above-mentioned first situation (the situation where the value of y is different, except for the situation where the value of y related to one of the two CSI reports is 2 and the value of y related to the other is 3), the second situation, and the third situation, different rules can be applied or the same rules can be applied.

[0105] According to the second embodiment described above, the UE can appropriately determine whether to transmit each of the conflicting CSI reports.

[0106] <Third Embodiment>

[0107] The third embodiment relates to CSI multiplexing rules / CSI priority rules for multiple CSI reports associated with different TRPs.

[0108] In the third embodiment, in order to send multiple CSI reports associated with different TRPs, it is also possible to assume that multiple PUCCH resources are set in one time slot for the UE. In addition, the environment in which the third embodiment is applied is not limited to this.

[0109] In a third embodiment, in the case where multiple PUCCH resources in a time slot are set to send a CSI report, and in the case where a list of PUCCH resources for multiple CSIs is not provided (RRC parameter "multi-CSI-PUCCH-ResourceList") or the above-mentioned multiple PUCCH resources do not overlap in the above-mentioned one time slot, the UE determines a first resource corresponding to a specific CSI report.

[0110] In addition, in the third embodiment, when a list of PUCCH resources for multiple CSIs is provided and the multiple PUCCH resources overlap in the one time slot, all CSI reports may be multiplexed in one resource from the resources provided by the list.

[0111] In the third embodiment, the “specific CSI report” may also be at least one of the following:

[0112] CSI reports with the highest priority;

[0113] CSI report associated with maximum / minimum TRP index.

[0114] In the third embodiment, when the UE determines the first resource as described above, the UE may select a second resource from the remaining PUCCH resources that satisfy a specific condition, and transmit up to two PUCCHs containing CSI information in different symbols in one time slot. The second resource may also be selected so that the two PUCCHs described above correspond to any one of the following as described in the first embodiment:

[0115] At least one is a short PUCCH;

[0116] Both are any of PUCCH formats 2, 3, and 4;

[0117] Both have the same PUCCH format.

[0118] When at least one of the above two PUCCHs needs to be a short PUCCH, and the first resource includes PUCCH format 2, and there are remaining resources in the above one time slot that do not overlap with the first resource and meet the above specific conditions, the UE determines the CSI report with the highest priority from the CSI reports with corresponding resources from the remaining resources, and determines the corresponding second resource as an additional resource for the CSI report.

[0119] In the case where at least one of the above two PUCCHs needs to be a short PUCCH, and the first resource includes PUCCH format 3 or PUCCH format 4, and there are remaining resources in the above one time slot that do not overlap with the first resource and include PUCCH format 2 and meet the above specific conditions, the UE determines the CSI report with the highest priority from the CSI reports with corresponding resources from the remaining resources, and determines the corresponding second resource as an additional resource for the CSI report.

[0120] When both of the above two PUCCHs are in any one of PUCCH formats 2, 3, and 4, and there are remaining resources in the above one time slot that do not overlap with the first resource and satisfy the above specific conditions, the UE determines the CSI report with the highest priority from the CSI reports with corresponding resources from the remaining resources, and determines the corresponding second resource as an additional resource for the CSI report.

[0121] In the case where both of the above-mentioned two PUCCHs need to be in the same PUCCH format, and the first resource includes PUCCH format 2 / 3 / 4, and there are remaining resources that meet the above-mentioned specific conditions and do not overlap with the first resource and include the same PUCCH format as the first resource in the above-mentioned one time slot, the UE decides the CSI report with the highest priority from the CSI reports with corresponding resources from the remaining resources, and determines the corresponding second resource as an additional resource for the CSI report.

[0122] In the third implementation, these “remaining resources satisfying specific conditions” may also be replaced by at least one of the following:

[0123] Any remaining resources (resources associated with a different TRP than the first resource or the same TRP);

[0124] The remaining resources associated with a different TRP than the first resource;

[0125] The remaining resources associated with the same TRP as the first resource.

[0126] In addition, according to the above content, it can be seen that "specific conditions" can also refer to specific conditions related to TRP.

[0127] In addition, when the above-mentioned “specific CSI report” corresponds to the CSI report with the highest priority, and when multiple CSI reports have the same (highest) priority, the UE may also select at least one of the following CSI reports from the multiple CSI reports and determine the first resource corresponding to the selected CSI report:

[0128] The CSI report associated with the largest TRP index;

[0129] The CSI report associated with the earliest PUCCH;

[0130] CSI reporting with better channel conditions.

[0131] In addition, when the multiple CSI reports corresponding to the remaining resources have the same (highest) priority, the UE may also select at least one of the following CSI reports from the multiple CSI reports, and determine the second resource corresponding to the selected CSI report:

[0132] The CSI report associated with the largest TRP index;

[0133] The CSI report associated with the earliest PUCCH;

[0134] CSI reporting with better channel conditions.

[0135] According to the third embodiment described above, the UE can determine a CSI report to be transmitted from a plurality of CSI reports in one slot, and appropriately determine the first resource, the second resource, etc., for transmitting the determined CSI report.

[0136] <Fourth Embodiment>

[0137] The fourth embodiment relates to CSI multiplexing rules / CSI priority rules for multiple CSI reports associated with different TRPs.

[0138] In the fourth embodiment, in order to send multiple CSI reports associated with different TRPs, it is also possible to assume that multiple PUCCH resources are set in one time slot for the UE. In addition, the environment in which the fourth embodiment is applied is not limited to this.

[0139] In the case where multiple PUCCH resources are set in a time slot for sending a CSI report, and in the case where a list of PUCCH resources for multiple CSIs is provided and the above-mentioned multiple PUCCH resources overlap in the above-mentioned one time slot, the UE may also select one resource from the resources provided through the list and multiplex all CSI reports in the one resource (implementation method 4.1).

[0140] In the case where multiple PUCCH resources are set in a time slot for sending a CSI report, and when a list of PUCCH resources for multiple CSIs is provided and the above-mentioned multiple PUCCH resources overlap in the above-mentioned time slot, the UE may first apply the CSI multiplexing rules of Rel.15 / 16 NR to the CSI reports associated with the same TRP for each TRP (for example, it may also select a resource from the list for each TRP) (implementation method 4.2).

[0141] In implementation 4.2, further, in the case where multiple PUCCH resources for different TRPs overlap, the UE may select at least one of the following PUCCH resources from the multiple PUCCH resources and use the selected PUCCH resource to send the CSI report, or may handle it as an error situation (for example, not sending through the overlapping two PUCCH resources):

[0142] The PUCCH resource associated with the largest TRP index (or the PUCCH resource corresponding to the CSI report associated with the largest TRP index);

[0143] • The PUCCH resources associated with the earliest PUCCH.

[0144] In the case where multiple PUCCH resources are set in a time slot for sending a CSI report, and when a list of PUCCH resources for multiple CSIs is provided and the above-mentioned multiple PUCCH resources overlap in the above-mentioned time slot, the UE may also first determine the TRP and then apply the CSI multiplexing rules of Rel.15 / 16 NR to the CSI report associated with the TRP (for example, a resource may also be selected from the list) (implementation method 4.3).

[0145] In implementation 4.3, the UE may also select at least one of the following TRPs from a plurality of TRPs:

[0146] A TRP selected based on a CSI report having a higher priority value (e.g., a TRP associated with the highest priority CSI report);

[0147] The TRP associated with the smallest TRP index;

[0148] The TRP associated with the earliest PUCCH (or the TRP associated with the CSI report corresponding to the earliest PUCCH);

[0149] • The TRP with the higher or highest channel condition (or the TRP associated with a CSI report with such channel condition).

[0150] According to the fourth embodiment described above, even in a case where multiple PUCCH resources are set in one time slot in order to send multiple CSI reports associated with different TRPs, and a list of PUCCH resources for multiple CSIs is provided and the multiple PUCCH resources overlap in the one time slot, the UE can, for example, appropriately determine the PUCCH resources to be sent by considering the TRP.

[0151] (Wireless Communication System)

[0152] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using any one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0153] Fig. 3 is a diagram showing an example of a schematic structure of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), or the like.

[0154] In addition, the wireless communication system 1 may also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC may also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (E-UTRA-NR Dual Connectivity (EN-DC))), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

[0155] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0156] The wireless communication system 1 may also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0157] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as base stations 10.

[0158] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0159] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to these. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0160] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0161] Multiple base stations 10 may also be connected by wire (e.g., optical fiber based on Common Public Radio Interface (CPRI), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station (relay) may also be referred to as an IAB node.

[0162] The base station 10 may be connected to the core network 30 via other base stations 10 or directly. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0163] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0164] In the wireless communication system 1, a wireless access method based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. may be used.

[0165] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the radio access schemes for UL and DL.

[0166] As downlink channels, the wireless communication system 1 may use a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20 , a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc.

[0167] In addition, as uplink channels, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. can also be used in the wireless communication system 1.

[0168] User data, high-layer control information, System Information Block (SIB), etc. are transmitted through PDSCH. User data, high-layer control information, etc. can also be transmitted through PUSCH. In addition, Master Information Block (MIB) can also be transmitted through PBCH.

[0169] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0170] In addition, the DCI for scheduling the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be replaced by DL data, and the PUSCH may also be replaced by UL data.

[0171] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space setting.

[0172] A search space may also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be interchangeable.

[0173] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) can also be transmitted through PUCCH. The random access preamble used to establish a connection with a cell can also be transmitted through PRACH.

[0174] In the present disclosure, downlink, uplink, etc. may be expressed without “link.” In addition, various channels may be expressed without “Physical” at the beginning.

[0175] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. As DL-RS, in the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. can also be transmitted.

[0176] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SS Block (SSB)), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0177] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. may also be transmitted. In addition, DMRS may also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0178] (Base Station)

[0179] 4 is a diagram showing an example of a structure of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may each be provided with more than one.

[0180] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0181] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

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

[0183] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0184] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0185] The transmitting / receiving antenna 130 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0186] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0187] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

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

[0189] The transmitting and receiving unit 120 (transmitting processing unit 1211) may also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output a baseband signal.

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

[0191] On the other hand, the transmission and reception unit 120 (RF unit 122 ) may also perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmission and reception antenna 130 .

[0192] The transmitting and receiving unit 120 (receiving processing unit 1212) may also apply receiving processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to obtain user data, etc.

[0193] The transmitting and receiving unit 120 (the measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (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 also be output to the control unit 110.

[0194] The transmission path interface 140 can also send and receive signals (return signaling) between devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0195] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission and reception unit 120 , the transmission and reception antenna 130 , and the transmission path interface 140 .

[0196] In addition, the transmitting and receiving unit 120 may also send information indicating the use of independent feedback in the channel state information (CSI) feedback for multiple transmission and reception points (multi-TRP) (for example, a high-layer parameter indicating a CSI feedback mode) to the user terminal 20. The transmitting and receiving unit 120 may also receive two uplink control channels (PUCCH) containing CSI reports in a controlled format (PUCCH format) from the terminal in different symbols within a time slot.

[0197] In addition, the transmitting and receiving unit 120 may also be conceived that, in the user terminal 20, when a plurality of uplink control channel (Physical Uplink Control Channel (PUCCH)) resources are set in one time slot in order to transmit a channel state information (CSI) report associated with different transmission and reception points, and a list of PUCCH resources for a plurality of CSIs is not provided or the plurality of PUCCH resources do not overlap in the one time slot, a first PUCCH resource (first resource) corresponding to a specific CSI report is determined. The transmitting and receiving unit 120 may also receive the specific CSI report in the first PUCCH resource.

[0198] (User terminal)

[0199] Fig. 5 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. In addition, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided with more than one.

[0200] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0201] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0202] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 220.

[0203] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0204] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0205] The transmitting / receiving antenna 230 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0206] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0207] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0208] The sending and receiving unit 220 (sending processing unit 2211) may also perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0209] The transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output a baseband signal.

[0210] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is valid (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0211] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0212] On the other hand, the transmission and reception unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmission and reception antenna 230 .

[0213] The sending and receiving unit 220 (receiving processing unit 2212) can also apply receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0214] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurement, CSI measurement, etc. based on the received signal. The measuring unit 223 may also measure the received power (e.g., RSRP), the received quality (e.g., RSRQ, SINR, SNR), the signal strength (e.g., RSSI), the propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0215] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0216] In addition, when independent feedback is used in the channel state information (CSI) feedback for multiple transmission and reception points, the control unit 210 may also control the format of two uplink control channels (PUCCH) containing CSI reports in different codewords within a time slot. The transmission and reception unit 220 may also transmit the two uplink control channels.

[0217] The control unit 210 may also assume that, when the CSI priority values ​​of a plurality of conflicting CSI reports associated with different transmission / reception points are different, the CSI report associated with the largest transmission / reception point index is not transmitted.

[0218] The control unit 210 may also assume that, when the CSI priority values ​​for a plurality of conflicting CSI reports associated with different transmission and reception points are different, the CSI report associated with the latest uplink control channel is not transmitted.

[0219] The control unit 210 may also assume that, when the CSI priority values ​​of a plurality of CSI reports associated with different transmission / reception points and conflicting with each other are different, a CSI report having a lower channel state is not transmitted.

[0220] In other words, when the CSI priority values ​​of multiple CSI reports associated with different transmitting and receiving points and conflicting with each other are different, the control unit 210 may also decide which one of these CSI reports to send based on parameters other than the CSI priority (which may also be replaced by information, elements, etc.).

[0221] The control unit 210 may also assume that, when the CSI priority values ​​of a plurality of CSI reports associated with different transmission / reception points and conflicting with each other are different, a CSI report having a lower channel state is not transmitted.

[0222] In addition, when multiple uplink control channel (Physical Uplink Control Channel (PUCCH)) resources are set in one time slot in order to send channel state information (CSI) reports associated with different transmission and reception points, and no list of PUCCH resources for multiple CSIs is provided or the multiple PUCCH resources do not overlap in the one time slot, the control unit 210 may also determine a first PUCCH resource corresponding to a specific CSI report. In this case, the transmission and reception unit 220 may also send the specific CSI report in the first PUCCH resource.

[0223] The specific CSI report may also be a CSI report associated with the largest transmitting / receiving point index.

[0224] The control unit 210 may also determine the first PUCCH resource, and further determine the second PUCCH resource from the remaining PUCCH resources that satisfy the specific conditions related to the transmission and reception points. In this case, the transmission and reception unit 220 may also send the CSI report in the second PUCCH resource. In addition, the remaining PUCCH resources may also refer to the remaining PUCCH resources other than the first PUCCH resources among the above-mentioned multiple PUCCH resources.

[0225] The remaining resources satisfying the specific condition related to the transmission / reception point may be remaining resources associated with a transmission / reception point different from the first resource.

[0226] (Hardware structure)

[0227] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, by wire, wireless, etc.) and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0228] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method is not particularly limited.

[0229] For example, the base station, user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. FIG6 is a diagram showing an example of the hardware structure of the base station and user terminal involved in one embodiment. The above-mentioned base station 10 and user terminal 20 may also be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0230] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. are interchangeable. The hardware structure of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or may not include some of the devices.

[0231] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0232] The functions of the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0233] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, at least a part of the control unit 110 (210), the transmission and reception unit 120 (220), etc. described above may also be implemented by the processor 1001.

[0234] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the other functional blocks can also be implemented in the same way.

[0235] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0236] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray (Blu-ray) (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other suitable storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0237] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) may also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0238] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that performs output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0239] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0240] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0241] (Variation)

[0242] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the applied standard. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0243] A radio frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a radio frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0244] Here, the parameter set may also refer to communication parameters applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of the subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, wireless frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, etc.

[0245] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0246] A time slot may also contain multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of a smaller number of symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0247] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be interchangeable.

[0248] For example, a subframe may be referred to as a TTI, a plurality of consecutive subframes may be referred to as a TTI, and a time slot or a mini time slot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0249] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0250] TTI can also be a transmission time unit for a data packet (transport block), code block, code word, etc. that has been channel-coded, and can also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (for example, the number of symbols) to which a transport block, code block, code word, etc. is actually mapped can also be shorter than the TTI.

[0251] In addition, when a time slot or a mini time slot is called a TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) may also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling may also be controlled.

[0252] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0253] In addition, long TTI (eg, normal TTI, subframe, etc.) may be replaced by a TTI having a time length exceeding 1 ms, and short TTI (eg, shortened TTI, etc.) may be replaced by a TTI having a TTI length shorter than that of long TTI and longer than 1 ms.

[0254] Resource Block (RB) is a resource allocation unit in the time domain and frequency domain, and may also include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0255] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks, respectively.

[0256] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0257] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0258] Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) can also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, common RBs can also be identified by the index of the RB based on the common reference point of the carrier. PRBs can also be defined in a BWP and numbered within the BWP.

[0259] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured in one carrier.

[0260] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive a specific channel / signal other than the activated BWP. In addition, the "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0261] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots per subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0262] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0263] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not limiting in all respects.

[0264] Information, signals, etc. described in the present disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0265] In addition, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0266] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0267] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0268] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (Layer 1 / Layer 2 (L1 / L2)) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0269] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0270] The determination may be made using a value represented by one bit (0 or 1), a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(eg, comparison with a specific value).

[0271] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software module, application, software application, software package, routine, sub-routine, object, executable files, execution thread, procedure, function, etc.

[0272] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when the software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0273] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0274] 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", "transmit power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0275] In the present disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)")", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro cell, and pico cell.

[0276] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0277] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0278] There are also instances where a mobile station is referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client or some other appropriate terminology.

[0279] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device carried in a mobile body, a mobile body, etc. The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous driving vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing a communication operation. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0280] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions of the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0281] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0282] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, Mobility Management Entity (MME)), Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0283] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, sequences, flow charts, etc. of the various methods / implementations described in this disclosure may be reversed in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0284] The various modes and embodiments described in the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems expanded based on them. In addition, multiple systems can also be combined (for example, LTE or LTE-A, combination with 5G, etc.) for application.

[0285] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0286] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used or that the first element must take precedence over the second element in some form.

[0287] The term "determining" used in this disclosure may include a variety of actions. For example, "determining" may also refer to situations where judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. are considered to be "determining".

[0288] In addition, “judgment (decision)” may also refer to situations where receiving (e.g., receiving information), transmitting (e.g., sending information), input (input), output (output), accessing (e.g., accessing data in a memory), etc. are regarded as making a “judgment (decision)”.

[0289] In addition, "judgment (decision)" can also be regarded as a situation where resolving, selecting, choosing, establishing, comparing, etc. are regarded as "judgment (decision)". That is, "judgment (decision)" can also be regarded as a situation where some actions are regarded as "judgment (decision)".

[0290] In addition, "judge (decide)" can also be replaced by "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0291] The terms "connected", "coupled", or all their variations used in this disclosure refer to all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be replaced by "access".

[0292] In the present disclosure, when two elements are connected, it is possible to consider being "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0293] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same way as "different".

[0294] When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms have an inclusive meaning, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not have an exclusive OR meaning.

[0295] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0296] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: a control unit that, when independent feedback for a plurality of control resource set pool indices (CORESET pool indices) is indicated as a case where a plurality of transmission and reception points are utilized, and when the values ​​of CSI priorities for a plurality of channel state information reports (CSI reports) associated with different CORESET pool indices and colliding are different, discards a CSI report associated with a largest CORESET pool index; and A sending unit sends the one of the multiple CSI reports that is not discarded.

2. A wireless communication method of a terminal, comprising the following steps: In a case where independent feedback for a plurality of control resource set pool indices (CORESET pool indices) is indicated as a case where a plurality of transmission and reception points are utilized, and in a case where the values ​​of CSI priorities for a plurality of channel state information reports (CSI reports) associated with different CORESET pool indices and conflicting are different, a step of discarding a CSI report associated with a largest CORESET pool index; and The step of sending the non-discarded one of the multiple CSI reports.

3. A base station, comprising: a transmitting unit, when a plurality of transmission and reception points are used, transmitting information indicating the use of independent feedback for a plurality of control resource set pool indexes, namely, CORESET pool indexes, to a terminal; and A receiving unit receives from the terminal a plurality of channel state information reports associated with different CORESET pool indexes and conflicting with each other, i.e., a non-discarded CSI report, wherein the CSI priority values ​​used for the plurality of CSI reports are different, and the CSI report associated with the largest CORESET pool index is discarded.

4. A system comprising: The terminal according to claim 1; and The base station as claimed in claim 3.

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