Terminal, wireless communication method, base station and system

Abstract

A terminal according to one embodiment of the present disclosure includes: a reception unit that receives a resource setting and a setting for beam reporting based on a plurality of groups; and a control unit that controls the beam reporting on the basis of the resource setting. At least one limit regarding the number of resource sets and the number of resources in the resource setting differs from the limit when beam reporting based on the plurality of groups is not set. The one embodiment of the present disclosure makes it possible to suitably use a resource for measurement / reporting of a beam based on a group.

Description

[Technical Field]

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

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) was specified with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Also, LTE-Advanced (3GPP Rel. 10-14) was specified with the aim of achieving higher capacity and more advanced features than LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later) are also being considered. [Prior art documents] [Non-patent literature]

[0004] [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 [Problem to be solved by the invention]

[0005] In Rel. 15 and 16 NR, a UE with group-based beam reporting enabled can only report two different beam indices for each reporting configuration. Therefore, in future wireless communication systems, beam management-related extensions are being considered for user terminals (User Equipment (UE)) with multiple panels (multi-panel) and multiple transmission / reception points (multi-TRP).

[0006] However, there is still no progress in studying how to set / determine measurement resources when implementing beam management-related enhancements. Unless this is clarified, there is a risk that communication quality / communication throughput will decrease.

[0007] Therefore, the present disclosure provides a terminal and a wireless communication method that appropriately use resources for measuring / reporting group-based beams. 、 base station and systems One of the aims is to provide [Means for solving the problem]

[0008] A terminal according to one aspect of the present disclosure includes: Group-based Channel State Information (CSI) Reporting Beam Reporting Settings Configuration information including a receiving unit for receiving the The setting information Based on Said CSI a control unit for controlling the report; The configuration information includes a resource type configuration for a time domain, and the number of resource sets for the CSI report is two for any of the plurality of resource types. The receiver receives an upper layer parameter indicating a list of aperiodic trigger states, and two of the resource sets are associated with one trigger state based on the upper layer parameter. . [Effects of the Invention]

[0009] According to one aspect of the present disclosure, resources for measuring / reporting beams based on groups can be used appropriately. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram illustrating an example of RRC information elements related to CSI resource configuration. [Figure 2] FIG. 2 is a diagram illustrating an example of a restriction on the number of resource sets for measuring / reporting beams for CSI resource settings in a CSI reporting configuration. [Figure 3] FIG. 3 is a diagram illustrating an example of a restriction on the number of resources for each resource set / resource setting. [Figure 4] Figure 4 is a diagram showing an example of a beam utilization environment assumed for multiple group-based beam reporting. [Figure 5] FIG. 5 is a diagram illustrating an example of limiting the number of resource sets according to the first embodiment. [Figure 6] FIG. 6 is a diagram illustrating an example of a restriction on the number of resources according to the second embodiment. [Figure 7] 7A and 7B are diagrams illustrating an example of an NZP-CSI-RS resource set information element. [Figure 8] FIG. 8 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 9] FIG. 9 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 10] FIG. 10 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 11] FIG. 11 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] (CSI) In NR, a UE measures a channel state using a reference signal (or a resource for the reference signal) and feeds back (reports) channel state information (CSI) to a network (e.g., a base station).

[0012] The UE may measure the channel state using at least one of a Channel State Information Reference Signal (CSI-RS), a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, a Synchronization Signal (SS), a Demodulation Reference Signal (DMRS), etc.

[0013] The CSI-RS resources may include at least one of non-zero power (NZP) CSI-RS resources, zero power (ZP) CSI-RS resources, and CSI interference measurement (CSI-IM) resources.

[0014] Resources for measuring signal components for CSI may be referred to as signal measurement resources (SMR) or channel measurement resources (CMR). SMR (CMR) may include, for example, NZP CSI-RS resources, SSB, etc. for channel measurement.

[0015] The resource for measuring the interference component for CSI may be referred to as an Interference Measurement Resource (IMR). The IMR may include, for example, at least one of an NZP CSI-RS resource, an SSB, a ZP CSI-RS resource, and a CSI-IM resource for interference measurement.

[0016] An SS / PBCH block is a block that includes a synchronization signal (e.g., a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS)) and a PBCH (and corresponding DMRS), and may also be referred to as an SS block (SSB).

[0017] The CSI may include at least one of a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a CSI-RS Resource Indicator (CRI), a SS / PBCH Block Resource Indicator (SSBRI), a Layer Indicator (LI), a Rank Indicator (RI), a Layer 1 Reference Signal Received Power (L1-RSRP), a Reference Signal Received Quality (L1-RSRQ), a Signal to Interference plus Noise Ratio (L1-SINR), a Signal to Noise Ratio (L1-SNR), and the like.

[0018] The CSI may have multiple parts. CSI Part 1 may include information with a relatively small number of bits (e.g., RI). CSI Part 2 may include information with a relatively large number of bits (e.g., CQI), such as information determined based on CSI Part 1.

[0019] Furthermore, CSI may be classified into several CSI types. The type and size of information to be reported may differ depending on the CSI type. For example, a CSI type set for communication using a single beam (also referred to as type 1 (type I) CSI, single-beam CSI, etc.) and a CSI type set for communication using multiple beams (also referred to as type 2 (type II) CSI, multi-beam CSI, etc.) may be defined. The use of CSI types is not limited to this.

[0020] Methods of CSI feedback under consideration include periodic CSI (P-CSI) reporting, aperiodic CSI (A-CSI) reporting, and semi-persistent CSI (SP-CSI) reporting.

[0021] The UE may be notified of the CSI measurement configuration information using higher layer signaling, physical layer signaling, or a combination thereof.

[0022] In the present disclosure, higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like, or a combination thereof.

[0023] The MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0024] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0025] The CSI measurement configuration information may be configured, for example, using the RRC information element "CSI-MeasConfig." The CSI measurement configuration information may include CSI resource configuration information (RRC information element "CSI-ResourceConfig"), CSI reporting configuration information (RRC information element "CSI-ReportConfig"), etc. The CSI resource configuration information is related to resources for CSI measurement, and the CSI reporting configuration information is related to how the UE performs CSI reporting.

[0026] The CSI reporting configuration information ("CSI-ReportConfig") includes resource information for channel measurement ("resourcesForChannelMeasurement"). The CSI reporting configuration information may also include resource information for interference measurement (e.g., NZP CSI-RS resource information for interference measurement ("nzp-CSI-RS-ResourcesForInterference"), CSI-IM resource information for interference measurement ("csi-IM-ResourcesForInterference"), etc.). These pieces of resource information correspond to the ID (Identifier) ​​of the CSI resource configuration information ("CSI-ResourceConfigId").

[0027] FIG. 1 is a diagram illustrating an example of an RRC information element related to CSI resource configuration. In this example, an excerpt of fields (which may also be referred to as parameters) included in the information element is illustrated. This diagram is written using ASN.1 (Abstract Syntax Notation One) notation. Note that other drawings related to RRC information elements (or RRC parameters) in this disclosure are also written using the same notation.

[0028] Note that the IDs of the CSI resource configuration information corresponding to each piece of resource information (which may also be referred to as CSI resource configuration IDs) may be one or more of the same value, or may each have a different value.

[0029] As shown in Fig. 1, the CSI resource configuration information ("CSI-ResourceConfig") may include a CSI resource configuration information ID, CSI-RS resource set list information ("csi-RS-ResourceSetList"), resource type ("resourceType"), etc. The CSI-RS resource set list may include at least one of NZP CSI-RS and SSB information for measurement ("nzp-CSI-RS-SSB") and CSI-IM resource set list information ("csi-IM-ResourceSetList").

[0030] The resource type indicates the time domain behavior of this resource configuration, and can be set to "aperiodic," "semi-persistent," or "periodic." For example, the corresponding CSI-RSs may be called A-CSI-RS, SP-CSI-RS, and P-CSI-RS, respectively.

[0031] The channel measurement resources may be used to calculate, for example, CQI, PMI, L1-RSRP, etc. The interference measurement resources may be used to calculate L1-SINR, L1-SNR, L1-RSRQ, and other indices related to interference.

[0032] If the interference measurement is performed on CSI-IM, each CSI-RS for channel measurement may be associated with a CSI-IM resource in terms of resources based on the order of the CSI-RS resources and CSI-IM resources in the corresponding resource set.

[0033] The "nzp-CSI-RS-SSB" may include NZP CSI-RS resource set list information ("nzp-CSI-RS-ResourceSetList") and SSB resource set list information for CSI measurements ("csi-SSB-ResourceSetList"). These lists correspond to one or more NZP CSI-RS resource set IDs ("NZP-CSI-RS-ResourceSetId") and CSI-SSB resource set IDs ("CSI-SSB-ResourceSetId"), respectively, and may be used to identify resources to be measured.

[0034] If the resource type is aperiodic, the NZP CSI-RS resource set list information includes the IDs of up to the maximum number of NZP CSI-RS resource sets per configuration (maxNrofNZP-CSI-RS-ResourceSetsPerConfig=16). Otherwise, the NZP CSI-RS resource set list information includes the ID of one resource set.

[0035] The SSB resource set list information for CSI measurements includes IDs of resource sets of the maximum number of CSI-SSB resource sets per configuration (maxNrofCSI-SSB-ResourceSetsPerConfig=1).

[0036] If the resource type is aperiodic, the CSI-IM resource set list information includes the IDs of resource sets up to the maximum number of CSI-IM resource sets per configuration (maxNrofCSI-IM-ResourceSetsPerConfig=16). Otherwise, the CSI-IM resource set list information includes the ID of one resource set.

[0037] FIG. 2 shows an example of a restriction on the number of resource sets for beam measurement / reporting for a CSI resource setting within a CSI reporting configuration.

[0038] For CMR based on NZP-CSI-RS for L1-RSRP, the number of resource sets is 1 for periodic and semi-persistent CSI resource settings. For CMR based on NZP-CSI-RS for L1-RSRP, the number of resource sets is up to 16 for aperiodic CSI resource settings, where each resource set has up to 64 resources. The total number of different CSI-RS resources across all resource sets is up to 128.

[0039] For CMR based on NZP-CSI-RS for L1-SINR, the number of resource sets in periodic and semi-persistent CSI resource settings is 1. For CMR based on NZP-CSI-RS for L1-SINR, the number of resource sets in aperiodic CSI resource settings is up to 16, where every resource set has up to 64 CSI-RS resources or up to 64 SS / PBCH block resources.

[0040] Only one aperiodic CSI-RS resource set from the resource setting is associated with one trigger state in the CSI aperiodic trigger state list (CSI-AperiodicTriggerStateList).

[0041] For SSB-based CMR for L1-RSRP, the number of resource sets is 1. For SSB-based CMR for L1-SINR, the number of resource sets is 1.

[0042] For CSI-IM for L1-SINR, it is aligned to the CMR according to the one-to-one mapping between CMR and IMR.

[0043] For NZP-IMR based on NZP-CSI-RS for L1-SINR, it is aligned to the CMR according to a one-to-one mapping between the CMR and the IMR.

[0044] Figure 3 shows an example of limiting the number of resources per resource set / resource setting.

[0045] For CMR based on NZP-CSI-RS for L1-RSRP, up to 64 resources are configured per CSI-RS resource set / resource setting. The total number of CSI-RS resources across all resource sets is up to 128. For aperiodic resource setting, the number of resources per CSI-RS resource set is up to 16.

[0046] For CMR based on NZP-CSI-RS for L1-SINR, up to 64 resources are configured per CSI-RS resource set / resource setting. For aperiodic resource setting, the number of resources per CSI-RS resource set is up to 16.

[0047] For SSB-based CMR for L1-RSRP, up to 64 resources are configured per CSI-RS resource set / resource setting.

[0048] For SSB-based CMR for L1-SINR, up to 64 resources are configured per CSI-RS resource set / resource setting.

[0049] For CSI-IM for L1-SINR, the number of resources per resource set / resource setting is aligned to the CMR according to a one-to-one mapping between the CMR and the IMR.

[0050] For NZP-IMR based on NZP-CSI-RS for L1-SINR, the number of resources per resource set / resource setting is aligned to the CMR according to a one-to-one mapping between the CMR and the IMR.

[0051] The UE shall not configure more than 64 NZP CSI-RS resources and / or SS / PBCH blocks in the resource setting for channel measurement for a CSI reporting configuration (CSI-ReportConfig) with the reporting quantity (reoprtQuantity) set to 'none' or 'cri-RI-CQI' or 'cri-RSRP' or 'ssbIndex-RSRP' or 'cri-SINR' or 'ssbIndex-SINR'.

[0052] If a UE is configured with a CSI reporting configuration with the reporting amount set to 'cri-RSRP', 'cri-SINR', or 'none', and that CSI reporting configuration is linked to a resource setting with the resource type set to aperiodic, the UE shall not assume that more than 16 CSI-RS resources are configured in the CSI-RS resource set included in that resource setting.

[0053] For group-based beam reporting, it is considered that two CMR resource sets are configured for two TRPs for each periodic / semi-persistent CMR resource setting.

[0054] The NZP CSI-RS resource set information ("NZP-CSI-RS-ResourceSet") includes an NZP CSI-RS resource set ID and one or more NZP CSI-RS resource IDs ("NZP-CSI-RS-ResourceId").

[0055] The NZP CSI-RS resource information ("NZP-CSI-RS-Resource") may include an NZP CSI-RS resource ID and an ID ("TCI-stateId") of a Transmission Configuration Indication state (TCI state). TCI states are described below.

[0056] The CSI-SSB resource set information ("CSI-SSB-ResourceSet") includes a CSI-SSB resource set ID and one or more SSB index information ("SSB-Index"), which may be an integer between 0 and 63, inclusive, and may be used to identify an SSB within an SS burst.

[0057] The TCI state is information about the Quasi-Co-Location (QCL) of a channel or a signal, and may also be referred to as spatial reception parameters, spatial relation information, etc. The TCI state may be configured or specified to the UE for each channel or signal.

[0058] The TCI state information ("TCI-State") may include a TCI state ID and one or more pieces of QCL information ("QCL-Info"). The QCL information may include at least one of information about a reference signal of the QCL source (RS-related information ("referenceSignal")) and information indicating a QCL type (QCL type information ("qcl-Type")). The RS-related information may include information such as an index of the RS (e.g., NZP CSI-RS resource ID, SSB index), an index of the serving cell, an index of the BWP (Bandwidth Part) where the RS is located, etc.

[0059] The UE may control reception processing (e.g., at least one of reception, demapping, demodulation, decoding, receive beam determination, etc.), transmission processing (e.g., at least one of transmission, mapping, modulation, coding, transmit beam determination, etc.), etc. for at least one of a signal and a channel (referred to as a signal / channel) based on the TCI state corresponding to the TCI state ID associated with the signal / channel.

[0060] In the present disclosure, "A / B" may also mean "at least one of A and B."

[0061] For the P-CSI-RS, the associated TCI state may be configured by RRC, whereas for the P-CSI-RS, SP-CSI-RS, and A-CSI-RS, the associated TCI state may be determined based on higher layer signaling, physical layer signaling, or a combination thereof.

[0062] (Beam Management) In Rel.15 NR, a method of Beam Management (BM) has been studied. In this beam management, beam selection is performed based on the L1-RSRP reported by the UE. Changing (switching) the beam of a certain signal / channel may correspond to changing at least one of the TCI state and QCL assumption of the signal / channel.

[0063] The UE may report (transmit) measurement results for beam management using an uplink control channel (Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (Physical Uplink Shared Channel (PUSCH)). The measurement results may be CSI including at least one of L1-RSRP, L1-RSRQ, L1-SINR, and L1-SNR, for example.

[0064] Measurement results (e.g., CSI) reported for beam management may be referred to as beam measurements, beam measurement reports, beam reports, beam report CSI, etc.

[0065] The CSI measurement for the beam report may include interference measurement. The UE may measure channel quality, interference, etc. using resources for CSI measurement to derive a beam report.

[0066] The beam report may include at least one of a channel quality measurement result and an interference measurement result. The channel quality measurement result may include, for example, L1-RSRP. The interference measurement result may include, for example, L1-SINR, L1-SNR, L1-RSRQ, or other interference-related indicators (e.g., any indicator other than L1-RSRP).

[0067] The CSI reporting configuration information may include a "report quantity" (which may be represented by the RRC parameter "reportQuantity"), which is information on parameters to be reported in one report instance (e.g., one CSI). The report quantity is defined by an ASN.1 object type called "choice type." Therefore, one of the parameters (such as cri-RSRP and ssb-Index-RSRP) defined as the report quantity is set.

[0068] A UE in which an upper layer parameter included in the CSI reporting configuration information (e.g., the RRC parameter "groupBasedBeamReporting" related to group-based beam reporting) is set to disabled may include in a beam report (one report instance) for each report setting, different numbers of beam measurement resource IDs (e.g., SSBRI, CRI) for the upper layer parameter included in the CSI reporting configuration information (e.g., the RRC parameter "nrofReportedRS" indicating the number of RSs to be reported) and measurement results (e.g., L1-RSRP) corresponding to each ID.

[0069] A UE with groupBasedBeamReporting enabled may include two different beam measurement resource IDs and two measurement results (e.g., L1-RSRP) corresponding to each ID in a beam report for each reporting configuration. In other words, a UE with groupBasedBeamReporting enabled divides DL-RSs (e.g., CSI-RSs) into two groups and reports the ID and measurement results for the RS corresponding to the top measurement result in each group. Note that the two beam measurement resources (CSI-RS resources, SSB resources) may be received simultaneously by the UE using one spatial domain receive filter or multiple simultaneous spatial domain receive filters.

[0070] The NZP CSI-RS resource set information may also include information about repetition of resources within the resource set. The information about the repetition may indicate, for example, 'on' or 'off'. Note that 'on' may be expressed as 'enabled' or 'valid', and 'off' may be expressed as 'disabled' or 'invalid'.

[0071] For example, for a resource set with repetition set 'on', the UE may assume that the resources in that resource set are transmitted using the same downlink spatial domain transmission filter, and in this case, the UE may assume that the resources in that resource set are transmitted using the same beam (e.g., from the same base station).

[0072] For a resource set for which repetition is set to 'off', the UE may control such that it must not (or may not) assume that resources within the resource set are transmitted using the same downlink spatial-domain transmit filter. In this case, the UE may assume that resources within the resource set are not transmitted using the same beam (transmitted using different beams). In other words, for a resource set for which repetition is set to 'off', the UE may assume that the base station is performing beam sweeping.

[0073] In Rel.15 NR, the reporting quantities cri-RSRP and ssb-Index-RSRP are related to beam management. A UE with cri-RSRP set as the reporting quantity reports CRI and the L1-RSRP corresponding to that CRI. A UE with ssb-Index-RSRP set as the reporting quantity reports SSBRI and the L1-RSRP corresponding to that SSBRI.

[0074] A CSI report may include one or more pairs of CRI / SSBRI and RSRP, and the number of pairs may be configured by a higher layer parameter (e.g., the RRC parameter "nrofReportedRS") indicating the number of reference signal resources to be reported.

[0075] For L1-RSRP reporting, if nrofReportedRS is set to 1 (value 'n1'), the CSI report includes RSRP#1, a field of a predetermined number of bits (e.g., m bits) indicating the L1-RSRP with the largest measurement value. In Rel. 15 NR, m=7.

[0076] For L1-RSRP reporting, if nrofReportedRS is set to be greater than 1 or if groupBasedBeamReporting is enabled, the UE uses differential L1-RSRP-based reporting. Specifically, the UE includes, in the same CSI report (reporting instance), RSRP#1 indicating the L1-RSRP of the largest measured value and differential RSRP#k calculated for the kth (e.g., k=2, 3, 4)th largest L1-RSRP by referring to the largest measured value (e.g., as a difference from the measured value). Here, differential RSRP#k may be a field of fewer bits (e.g., n bits) than the predetermined number. In Rel. 15 NR, n=4.

[0077] For example, for each group, a 7-bit absolute RSRP value (ranging from -140 to -44 dBm with a 1 dB step size) for the first beam and a 4-bit differential RSRP value for the second beam are reported.

[0078] When groupBasedBeamReporting is enabled, the UE includes RSRP#1 and differential RSRP#2 in the same CSI report.

[0079] In the CSI report, CRI / SSBRI#k is a field indicating the CRI / SSBRI corresponding to RSRP#k or differential RSRP#k (included when reporting RSRP#k or differential RSRP#k).

[0080] Note that in NR after Rel.16, nrofReportedRS may be a value equal to or greater than 4. The CSI report may include four or more pairs of CRI / SSBRI and RSRP. The above m, n, etc. are not limited to 7 and 4, respectively.

[0081] Furthermore, in NR Rel. 16 and later, L1-SINR reporting may be performed. The L1-SINR report may be based on the above-described L1-RSRP report, where RSRP is replaced with SINR. In this case, the settings / parameters for SINR may be different from the settings / parameters for RSRP. For example, the above-described nrofReportedRS may be replaced with nrofReportedRSForSINR, which indicates the number of reference signal resources for which SINR is to be reported.

[0082] (Extended Group-Based Beam Report) For future wireless communication systems (e.g., Rel. 17 NR), beam management-related extensions (e.g., beam reports suitable for multiple TRPs, which may also be called extended group-based beam reports) for user terminals (user equipment (UE)) with multiple panels (multi-panels) and multiple transmission / reception points (multi-TRPs) are being considered.

[0083] The above-mentioned groupBasedBeamReporting can report two groups in one report, making it suitable for cases where multi-TRP transmission, multi-panel reception, etc. are applied. For example, it can be used to report the best beam (corresponding to the best / highest measurement result) for TRP1 as RSRP#1 and the best beam for TRP2 as differential RSRP#2.

[0084] As described above, in Rel. 15 and 16, a UE with group-based beam reporting enabled can only report two different CRI / SSBRI (which may also be read as beam index) for each reporting setting. For this reason, for Rel. 17, studies are underway to increase the number of groups that can be reported by group-based beam reporting beyond two. Furthermore, for more flexible reporting, a configuration that allows reporting of two or more CRI / SSBRI within a group is also under study.

[0085] Group-based beam reporting using such beam reports (beam reports in which the number of groups for the report is greater than two or in which two or more CRI / SSBRIs are reported within the groups for the report) may be referred to as multiple group-based beams, extended group-based beam reporting, Rel. 17 group-based beam reporting, etc. (hereinafter referred to as multiple group-based beam reporting).

[0086] There are two possible modes for operating multiple group-based beam reporting: Mode 1: The UE can simultaneously receive multiple beams, each belonging to a different group. Mode 2: The UE can simultaneously receive multiple beams belonging to the same group.

[0087] Hereinafter, a situation in which multiple group-based beam reporting is used will be described using the example environment of Fig. 4. Fig. 4 is a diagram showing an example of a beam usage environment assumed for multiple group-based beam reporting.

[0088] In Figure 4, the UE measures the resources of the reference signals (CSI-RS) transmitted from two TRPs (TRP#1, #2). The UE has two panels (panels #1, #2), each of which can form a different beam (B1-1, B1-2, B2-1, B2-2).

[0089] TRP#1 transmits CSI-RS using resources CRI#1-1 to CRI#1-4, each corresponding to a different beam. TRP#2 transmits CSI-RS using resources CRI#2-1 to CRI#2-4, each corresponding to a different beam. In this disclosure, beams CRI#1-1 to CRI#1-4 may be interchangeably referred to as transmission beams #1-#4, respectively. In this disclosure, beams CRI#2-1 to CRI#2-4 may be interchangeably referred to as transmission beams #5-#8, respectively.

[0090] Each TRP and UE may transmit and receive by sweeping their respective beams (using different times / frequencies), or may transmit and receive using several beams simultaneously.

[0091] Note that FIG. 4 is an example, and for example, TRP#1 and #2 may be interpreted as two panels (panels #1 and #2) of a certain TRP.

[0092] The RSRP / SINRs corresponding to CRI#1-1 to CRI#1-4 may be written as RSRP / SINR#1-1 to RSRP / SINR#1-4, respectively. The RSRP / SINRs corresponding to CRI#2-1 to CRI#2-4 may be written as RSRP / SINR#2-1 to RSRP / SINR#2-4, respectively.

[0093] Furthermore, hereinafter, a resource corresponding to a certain CRI may be simply referred to as a certain CRI (for example, CRI#1-1 may mean CRI#1-1 or may mean a resource corresponding to CRI#1-1).

[0094] In the present disclosure, it is assumed that one resource configuration (which may be referred to as a Reference Signal (RS) configuration) corresponds to (is associated with) one TRP. The resource configuration corresponding to one TRP may correspond to at least one of CSI resource configuration information ("CSI-ResourceConfig"), a CSI-RS resource set list, an NZP CSI-RS resource set, and a CSI-SSB resource set, for example.

[0095] For example, with respect to Figure 4, RRC configuration may be performed as follows: CSI reporting configuration #0 configured in the UE includes CSI resource configurations #0 and #1. CSI resource configuration #0 is associated with resource set #0 (CSI-RS resource set #0), and four CSI-RS resources corresponding to CRIs #1-1 to #1-4 are configured in resource set #0. CSI resource configuration #1 is associated with resource set #1 (CSI-RS resource set #1), and four CSI-RS resources corresponding to CRIs #2-1 to #2-4 are configured in resource set #1.

[0096] Note that the contents of the present disclosure may also be applied to cases where one resource setting corresponds to (is associated with) multiple TRPs.

[0097] For example, the UE selects two beams from TRP#1 measured using panel #1 and two beams from TRP#2 measured using panel #2, assuming in this example that panel #1 is associated with group #1 and panel #2 is associated with group #2.

[0098] For example, for each group, the UE selects a beam from one TRP measured using panel #1 and a beam from the other TRP measured using panel #2.

[0099] The UE may support either Mode 1 or Mode 2, or may support both.

[0100] The beam measurement / reporting may follow at least one of the following options 1 to 3. The beam measurement / reporting may be used for inter-TRP beam pairing, where option 1 corresponds to mode 1 and option 2 corresponds to mode 2.

[0101] [Option 1] In CSI reporting, the UE may report N (N>1) pairs / groups and M (M>=1) beams for each pair / group. Different beams in different pairs / groups may be received simultaneously.

[0102] [Option 2] In CSI reporting, the UE may report N (N>=1) pairs / groups and M (M>1) beams for each pair / group. Different beams in one pair / group may be received simultaneously.

[0103] [Option 3] The UE may report M (M>=1) beams in N (N>1) CSI reports corresponding to N (N>1) reporting settings. Different beams corresponding to different CSI reports may be received simultaneously.

[0104] (analysis) In one CSI resource setting for one CSI reporting configuration, the following problems can be considered for two CMR resource sets for group-based beam reporting.

[0105] [Problem 1] The CMR resource set configuration for P / SP / AP CSI resource setting for L1-RSRP / L1-SINR is unclear.

[0106] [Problem 2] The CMR resource set configuration for each resource set / resource setting for L1-RSRP / L1-SINR is not clear.

[0107] If such resource set configuration is not clear, it may result in a decrease in communication quality / throughput.

[0108] Therefore, the inventors came up with a method for configuring measurement resources for group-based beam reporting.

[0109] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0110] In the present disclosure, the terms panel (receiving panel, UE panel), Uplink (UL) transmitting entity, TRP, spatial relationship, control resource set (CORESET), PDSCH, codeword, base station, antenna port (e.g., Demodulation Reference Signal (DMRS) port), antenna port group (e.g., DMRS port group), group (e.g., Code Division Multiplexing (CDM) group, reference signal group, CORESET group, CORESET pool), reference signal setting, reference signal set setting, etc. may be interchangeable.

[0111] Panel Identifier (ID) and Panel may be interchangeable. TRP ID and TRP may be interchangeable. Index and ID may be interchangeable.

[0112] In the present disclosure, a group may be interchangeably read as a set, a cluster, a panel, a group relating to a (reported) beam, a pair, a set, a grouping, a TRP, etc.

[0113] In the following embodiments, the beam index may be replaced with, for example, CRI / SSBRI, and the RSRP / SINR may be replaced with any beam-related measurement result.

[0114] Furthermore, CSI-RS-related terms may be replaced with corresponding SSB-related terms. For example, CSI-RS resources may be replaced with SSB resources. In other words, CSI-RS may be replaced with CSI-RS / SSB, and CRI may be replaced with CRI / SSBRI.

[0115] Also, in the present disclosure, a "receiving panel" may correspond to at least one of an RS group, a TRP index, a CORESET pool index, an RS group configured for group-based beam reporting, a TCI state (or TCI) group, a QCL assumption (or QCL) group, and a beam group.

[0116] Also, in the present disclosure, group-based beam measurement / reporting for multi-TRP transmission or multi-panel UE reception, beam reporting based on multiple groups, and multiple group-based beam reporting may be read interchangeably.

[0117] In addition, in the present disclosure, resource setting, CSI resource setting, and CSI resource configuration (CSI-ResourceConfig) may be read as interchangeable.

[0118] Also, in the present disclosure, reporting setting, CSI reporting setting, and CSI reporting configuration (CSI-ReportConfig) may be read interchangeably.

[0119] Additionally, in the present disclosure, the terms "each" and "per" may be read interchangeably.

[0120] In addition, in the present disclosure, the terms level, parameter, setting, information element, set, group, and association may be read interchangeably.

[0121] In the present disclosure, measurement results, RSRP, SINR, L1-RSRP, L1-RSRP, SS-RSRP, CSI-RSRP, SSS-SINR, and CSI-SINR may be read interchangeably.

[0122] In each embodiment, at least one of the beam measurement, the beam report, and the CSI report may be applied to at least one of the serving cell and the non-serving cell. For example, multiple groups / pairs may be associated with multiple cells, and each cell may be a serving cell or a non-serving cell.

[0123] (Wireless communication method) First Embodiment The number of resource sets configured by RRC for measuring / reporting group-based beams for CSI resource setting for multi-TRP transmission or multi-panel UE reception may be limited / determined / specified using conditions / values.

[0124] The number of resource sets may follow at least one of the following cases 1 to 6 (FIG. 5).

[0125] [Case 1] For CMR based on NZP-CSI-RS for L1-RSRP, the number of resource sets in periodic and semi-persistent CSI resource settings may be two or other values.

[0126] For CMR based on NZP-CSI-RS for L1-RSRP, the maximum number of resource sets in aperiodic CSI resource setting may be 16 (the same as the existing value), 32 (more than the existing value, e.g., twice as much), 8 (less than the existing value, e.g., half as much), or some other value.

[0127] [Case 2] For CMR based on NZP-CSI-RS for L1-SINR, the number of resource sets in periodic and semi-persistent CSI resource settings may be two or other values.

[0128] For CMR based on NZP-CSI-RS for L1-SINR, the maximum number of resource sets in aperiodic CSI resource setting may be 16 (the same as the existing value), 32 (more than the existing value, e.g., twice as much), 8 (less than the existing value, e.g., half as much), or some other value.

[0129] [Case 3] For SSB-based CMR for L1-RSRP, the number of resource sets may be two or any other value.

[0130] [Case 4] For SSB-based CMR for L1-SINR, the number of resource sets may be two or other values.

[0131] [Case 5] For CSI-IM for L1-SINR, it is aligned to the CMR according to the one-to-one mapping between CMR and IMR.

[0132] If CMR is based on NZP CSI-RS, the number of CSI-IM resource sets in periodic and semi-persistent resource settings may be two or other values.

[0133] The maximum number of CSI-IM resource sets in aperiodic CSI resource setting may be the same as the existing value (e.g., 16), more than the existing value (e.g., 32, which is twice the existing value), less than the existing value (e.g., 8, which is half the existing value), or some other value. If CMR is based on SSB, the number of CSI-IM resource sets may be 2 or some other value.

[0134] [Case 6] For NZP-IMR based on NZP-CSI-RS for L1-SINR, it is aligned to the CMR according to a one-to-one mapping between the CMR and the IMR.

[0135] If CMR is based on NZP CSI-RS, the number of CSI-IM resource sets in periodic and semi-persistent resource settings may be two or other values.

[0136] The maximum number of CSI-IM resource sets in aperiodic CSI resource setting may be the same as the existing value (e.g., 16), a value greater than the existing value (e.g., 32, which is twice the existing value), a value less than the existing value (e.g., 8, which is half the existing value), or some other value. If CMR is based on SSB, the number of CSI-IM resource sets may be 2 or some other value.

[0137] [Variations] For aperiodic resource setting (CSI resource setting (CSI-ResourceConfig) with resource type aperiodic, CSI aperiodic trigger state list configuration), one or two CSI-RS resource sets can be associated with one trigger state. The two CSI-RS resource sets associated with one trigger state may be used only for group-based beam reporting.

[0138] For a UE configured with the higher layer parameter CSI-AperiodicTriggerStateList, if a resource setting linked to a CSI reporting configuration (CSI-ResourceConfig) has multiple aperiodic resource sets, one or two of the aperiodic CSI-RS resource sets from the resource setting are associated with the trigger state, and the UE may be configured by higher layers for each trigger state and for each resource setting to select one or two CSI-IM / NZP CSI-RS resource sets from the resource setting. Only when the higher layer parameter for group-based beam reporting (groupBasedBeamReporting) is set to 'enabled,' one or both of the two CSI-RS resource sets and the two CSI-IM / NZP CSI-RS resource sets may be configured.

[0139] For aperiodic resource setting, if X CSI resource sets are RRC configured, the UE may follow either of options 1 and 2 below on how to ensure that two CSI-RS resource sets configured for one trigger condition are for different TRPs or different UE panels.

[0140] [Option 1] The behavior is implementation-dependent: if two CSI-RS resource sets are configured to be associated with one trigger state, the UE assumes that the two CSI-RS resource sets correspond to different TRPs or different UE panels.

[0141] [Option 2] X CSI-RS resource sets are grouped into Y groups, with different groups corresponding to different TRPs or different UE panels. For group-based beam reporting, it may be specified that the UE assumes that two CSI-RS resource sets configured for one trigger state are in different groups.

[0142] The grouping may be implicit, e.g., the first X / 2 sets may be for the first TRP and the remaining X / 2 sets may be for the second TRP. The grouping may also be explicit, e.g., a grouping ID for each CSI-RS resource set may be signaled.

[0143] An association between one group and one TRP may be set. For example, a CORESET pool index, another RS ​​ID, a grouping ID, etc. may be set for the group.

[0144] According to this embodiment, the UE can be appropriately configured with the number of resource sets / resource sets / RRC IEs for group-based beam reporting for multi-TRP / multi-UE panels.

[0145] <Second embodiment> The number of resources configured by RRC for measuring / reporting group-based beams for CSI resource setting for multi-TRP transmission or multi-panel UE reception may be limited / determined / specified using conditions / values.

[0146] The number of resources may follow at least one of the following cases 1 to 6 (Figure 6).

[0147] [Case 1] For CMR based on NZP-CSI-RS for L1-RSRP, at least one of the following may be the same as the existing value (e.g., 64), a value greater than the existing value (e.g., 128, which is twice the existing value), a value less than the existing value (e.g., 32, which is half the existing value), or some other value. The total maximum number of CSI-RS resources across all resource sets may be the same as the existing value (e.g., 128), a value greater than the existing value (e.g., 256, which is twice the existing value), or some other value.

[0148] In aperiodic CSI resource setting, the maximum number of resources per resource set may be the same as the existing value (e.g., 16), a value greater than the existing value (e.g., 32, which is twice the existing value), a value less than the existing value (e.g., 8, which is half the existing value), or some other value.

[0149] [Case 2] For CMR based on NZP-CSI-RS for L1-SINR, at least one of the following may be the same as the existing value (e.g., 64), a value greater than the existing value (e.g., 128, which is twice the existing value), a value less than the existing value (e.g., 32, which is half the existing value), or another value.

[0150] In aperiodic CSI resource setting, the maximum number of resources per resource set may be the same as the existing value (e.g., 16), a value greater than the existing value (e.g., 32, which is twice the existing value), a value less than the existing value (e.g., 8, which is half the existing value), or some other value.

[0151] [Case 3] For CMR based on NZP-CSI-RS for L1-RSRP, the number of resources may follow either option 1 or 2 below. [[Option 1]] The maximum number of resources per resource set / resource setting may be the existing value (e.g., 64). [[Option 2]] The maximum number of resources per resource set / resource setting may be increased from the existing value (for example, doubled to 128).

[0152] When using the PCI of the serving cell (intra-cell), even if there are two TRPs, option 1 applies and the total maximum number of SSB resources may be 64. Only when additional cells with different PCIs are configured (inter-cell), option 2 applies and the maximum number of resources for each TRP may be 64.

[0153] [Case 4] For CMR based on NZP-CSI-RS for L1-SINR, the number of resources may follow either option 1 or 2 below. [[Option 1]] The maximum number of resources per resource set / resource setting may be the existing value (e.g., 64). [[Option 2]] The maximum number of resources per resource set / resource setting may be increased from the existing value (for example, doubled to 128).

[0154] When using the PCI of the serving cell (intra-cell), even if there are two TRPs, option 1 applies and the total maximum number of SSB resources may be 64. Only when additional cells with different PCIs are configured (inter-cell), option 2 applies and the maximum number of resources for each TRP may be 64.

[0155] [Case 5] For CSI-IM for L1-SINR, the number of IMR resources is aligned with the number of CMR resources according to the one-to-one mapping between CMR and IMR.

[0156] The maximum number of resources (IMR) per CSI-IM resource set / resource setting may be the same as the existing value (e.g., 64), a value greater than the existing value (e.g., 128, which is twice the existing value), a value less than the existing value (e.g., 32, which is half the existing value), or some other value.

[0157] In aperiodic CSI resource setting, the maximum number of resources (IMR) per CSI-IM resource set / resource setting may be the same as the existing value (e.g., 16), a value greater than the existing value (e.g., 32, which is twice the existing value), a value less than the existing value (e.g., 8, which is half the existing value), or some other value.

[0158] If CMR is based on SSB, the maximum number of resources (IMR) per CSI-IM resource set / resource setting may follow either option 1 or 2 below. [[Option 1]] The maximum number of resources (IMR) per CSI-IM resource set / resource setting may be the existing value (e.g., 64). [[Option 2]] The maximum number of resources (IMR) per CSI-IM resource set / resource setting may be a value greater than the existing value (for example, 128, which is twice the existing value).

[0159] [Case 6] For NZP-IMR based on NZP-CSI-RS for L1-SINR, the number of IMR resources is aligned with the number of CMR resources according to a one-to-one mapping between CMR and IMR.

[0160] The maximum number of resources (IMR) per NZP-IMR resource set / resource setting may be the same as the existing value (e.g., 64), more than the existing value (e.g., 128, which is twice the existing value), less than the existing value (e.g., 32, which is half the existing value), or may be some other value.

[0161] In aperiodic CSI resource setting, the maximum number of resources (IMR) per NZP-IMR resource set / resource setting may be the same as the existing value (e.g., 16), a value greater than the existing value (e.g., 32, which is twice the existing value), a value less than the existing value (e.g., 8, which is half the existing value), or some other value.

[0162] If CMR is based on SSB, the maximum number of resources (IMR) per NZP-IMR resource set / resource setting may follow either option 1 or 2 below. [[Option 1]] The maximum number of resources (IMRs) per NZP-IMR resource set / resource setting may be the existing value (eg, 64). [[Option 2]] The maximum number of resources (IMR) per NZP-IMR resource set / resource setting may be greater than the existing value (for example, 128, which is twice the existing value).

[0163] [Variations] In Rel. 16, for resources in each resource set (at least one of NZP-CSI-RS-based CMR, SSB-based CMR, CSI-IM, and NZP-CSI-RS-based NZP-IMR), some information elements are configured for each resource set. For example, for NZP-CSI-RS-based CMR, some information elements configured for each NZP-CSI-RS resource set (NZP-CSI-RS-ResourceSet) are at least one of repetition, aperiodic triggering offset, tracking RS information, and Rel. 16 aperiodic triggering offset (aperiodicTriggeringOffset-r16) (see FIG. 7).

[0164] For resources in different resource sets (for different TRPs), the specific information element may follow either of the following options 1 and 2. Different TRPs may for example have different grouping IDs (variant of the first embodiment).

[0165] [[Option 1]] The specific information elements are independent for each resource set, as in Rel. 16. The values ​​of all the specific information elements may be different for different resource sets.

[0166] [[Option 2]] The values ​​of some specific information elements are common at a specific level (a plurality of specific parameters). The values ​​of some other specific information elements may be different at a specific level (a plurality of specific parameters), or may be different at a specific level and at a different level (a plurality of other parameters). The specific level may be at least one of the following options 1 to 3. Option 1: Grouping of corresponding resource sets / TRP Option 2: Two CSI-RS resource sets for one trigger state Option 3: All resource sets

[0167] For example, the value of the repetition information element may be common to all resource sets, and the value of the periodicity and offset information element may be different for each TRP or may be common to multiple resource sets within one TRP.

[0168] For example, the values ​​of the information elements starting PRB / bandwidth / antenna ports / density may be different for each TRP or may be common to multiple resource sets within one TRP.

[0169] For example, the value of the aperiodic triggering offset (aperiodicTriggeringOffset) / Rel.16 aperiodic triggering offset (aperiodicTriggeringOffset-r16) information element may be common to two CSI-RS resource sets for one triggering state.

[0170] For each resource set / resource setting, the number of resources actually configured by RRC may follow either of the following options 1 and 2. [Option 1] For each resource set / resource setting, the number of resources actually configured by RRC is common at a specific level (multiple specific parameters). [Option 2] For each resource set / resource setting, the number of resources actually configured by RRC varies for each specific level (specific parameter).

[0171] In other words, the resource setting may include at least one of a first information element common to multiple resource sets associated with one TRP or one grouping, two resource sets associated with one trigger state, or all resource sets, and a second information element different for multiple transmission / reception points.

[0172] According to this embodiment, the number of resources / RRC IEs for group-based beam reporting for a multi-TRP / multi-UE panel can be appropriately configured.

[0173] <Other embodiments> Higher layer parameters (RRC IEs) / UE capabilities corresponding to the functions (features) in each of the above embodiments may be defined. The higher layer parameters may indicate whether the functions are enabled. The UE capabilities may indicate whether the UE supports the functions.

[0174] A UE for which higher layer parameters corresponding to the function are configured may perform the function. It may also be specified that "a UE for which higher layer parameters corresponding to the function are not configured shall not perform the function (for example, in accordance with Rel. 15 / 16)."

[0175] A UE that reports a UE capability indicating that it supports the function may perform the function. It may also be specified that a UE that does not report a UE capability indicating that it supports the function shall not perform the function (e.g., in accordance with Rel. 15 / 16).

[0176] If the UE reports a UE capability indicating that it supports the function and the corresponding upper layer parameter is configured, the UE may perform the function. It may also be specified that "if the UE does not report a UE capability indicating that it supports the function or if the corresponding upper layer parameter is not configured, the UE shall not perform the function (e.g., in accordance with Rel. 15 / 16)."

[0177] The UE capability may indicate whether the resource set is configured by the RRC for measurement / reporting of group-based beams for the CSI resource setting for the P / SP / AP resource setting. If it is supported, the UE capability may indicate the number (maximum number) of resource sets configured by the RRC for measurement / reporting of group-based beams for the CSI resource setting for the P / SP / AP resource setting.

[0178] The UE capabilities may indicate whether it supports two CSI-RS resource sets associated with one trigger state being configured for group-based beam measurement / reporting.

[0179] The UE capabilities may indicate whether or not it supports grouping / associating CSI-RS resource sets with TRPs.

[0180] The UE capability may indicate, for each P / SP / AP resource setting, whether resources for group-based beam measurement / reporting for the CSI resource setting are configured by RRC. If supported, the UE capability may indicate, for each P / SP / AP resource setting, at least one of the following: the number of resources configured by RRC per resource set (maximum number) for group-based beam measurement / reporting for the CSI resource setting; and the number of resources configured by RRC per resource setting (maximum number). The resources may be at least one of NZP-CSI-RS-based CMR, SSB-based CMR, CSI-IM, and NZP-CSI-RS-based NZP-IMR.

[0181] The UE capabilities may indicate whether it supports the same (common) or different specific information elements for multiple resource sets, multiple TRPs, one TRP, two resource sets for one trigger condition, or all resource sets.

[0182] The above UE capability / higher layer parameters may be common to L1-RSRP and L1-SINR, or may be different.

[0183] The above UE capabilities / upper layer parameters allow the UE to achieve the above functions while maintaining compatibility with existing specifications.

[0184] (wireless communication system) The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.

[0185] 8 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0186] The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0187] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0188] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0189] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The locations and numbers of the cells and user terminals 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.

[0190] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0191] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may be a frequency band higher than FR2.

[0192] 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.

[0193] The multiple base stations 10 may be connected by wire (for example, optical fiber conforming to the Common Public Radio Interface (CPRI), an X2 interface, or the like) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0194] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0195] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0196] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the radio communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0197] The radio access scheme may also be called a waveform. Note that 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 UL and DL radio access schemes.

[0198] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0199] Furthermore, in the wireless communication system 1, 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. may be used as an uplink channel.

[0200] The PDSCH transmits user data, higher layer control information, System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit Master Information Block (MIB).

[0201] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information for at least one of the PDSCH and the PUSCH.

[0202] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as an UL grant, a UL DCI, etc. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

[0203] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0204] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," "CORESET setting," etc. in the present disclosure may be read interchangeably.

[0205] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0206] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0207] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted as DL-RS.

[0208] 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 the SS (PSS, SSS) and the PBCH (and DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as reference signals.

[0209] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0210] (base station) 9 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0211] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0212] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0213] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0214] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0215] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 1211 and an RF unit 122. The receiving unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0216] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0217] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0218] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0219] The transceiver 120 (transmission processing unit 1211) may 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 data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0220] The transceiver 120 (transmission processor 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0221] The transmitting / receiving unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna .

[0222] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna .

[0223] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0224] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0225] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0226] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0227] The transceiver 120 may transmit a beam report configuration based on multiple groups and a resource setting. The controller 110 may control reception of the beam report based on the resource setting. At least one of the restrictions on the number of resource sets and the number of resources in the resource setting may be different from the restrictions when the beam report based on multiple groups is not configured.

[0228] (user terminal) 10 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0229] Note that this example mainly shows functional blocks of the characteristic parts of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0230] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0231] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 220.

[0232] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured from a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0233] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0234] The transmitting / receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0235] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0236] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0237] The transceiver 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0238] The transceiver 220 (transmission processor 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0239] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and when transform precoding is not enabled, the transceiver unit 220 may not perform DFT processing as the transmission processing.

[0240] The transmitting / receiving unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna 230.

[0241] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0242] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

[0243] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0244] The transmitting section and receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0245] The transceiver 220 may receive a beam report configuration based on multiple groups and a resource setting. The controller 210 may control the beam report based on the resource setting. At least one of the restrictions on the number of resource sets and the number of resources in the resource setting may be different from the restrictions when the beam report based on multiple groups is not configured.

[0246] In the resource setting, two channel state information reference signal (CSI-RS) resource sets may be associated with one trigger state.

[0247] In the resource setting, one or more CSI-RS resource sets may be associated with a transmitting / receiving point.

[0248] The resource setting may include at least one of a first information element common to any of multiple resource sets associated with one transmission / reception point or one grouping, two resource sets associated with one trigger state, and all resource sets, and a second information element different for multiple transmission / reception points.

[0249] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or multiple devices with software.

[0250] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As mentioned above, the implementation method of each is not particularly limited.

[0251] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 11 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may 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.

[0252] In this disclosure, terms such as apparatus, circuit, device, section, unit, etc. may be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0253] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0254] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0255] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0256] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be realized in a similar manner.

[0257] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory, or the like. The memory 1002 may store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to an embodiment of the present disclosure.

[0258] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as a secondary storage device.

[0259] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0260] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0261] Furthermore, each device, such as the processor 1001 and the memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0262] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using such hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0263] (Variation) Note that terms explained in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0264] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0265] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), the number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0266] A slot may be composed of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol), and may be a time unit based on numerology.

[0267] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0268] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be interchangeable.

[0269] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot 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. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0270] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. However, the definition of TTI is not limited to this.

[0271] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0272] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0273] A TTI having a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0274] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0275] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0276] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0277] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0278] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0279] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0280] The BWP may include an UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0281] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0282] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0283] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0284] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0285] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0286] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes.

[0287] Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0288] Notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0289] Note that the physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be called an RRC message, such as an RRC connection setup message or an RRC connection reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0290] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0291] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0292] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0293] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0294] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0295] 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," "panel," etc. may be used interchangeably.

[0296] In this disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0297] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0298] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0299] A mobile station may also be 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, handset, user agent, mobile client, client, or some other suitable terminology.

[0300] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, or the mobile object itself. The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0301] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as uplink channel and downlink channel may be read as sidelink channel.

[0302] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0303] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0304] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the specific order presented.

[0305] Each aspect / embodiment described in the present disclosure may be related 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 The present invention may be applied to systems that use 802.20, Ultra-Wide Band (UWB), Bluetooth (registered trademark), or other appropriate wireless communication methods, or to next-generation systems that are based on and extend these systems. Furthermore, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0306] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0307] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0308] The term "determining," as used in this disclosure, may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, etc.

[0309] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0310] Also, "decision" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. In other words, "decision" may be considered to be "deciding" on some action.

[0311] Furthermore, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," or the like.

[0312] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0313] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0314] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0315] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0316] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0317] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0318] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and explanatory and does not impose any limiting meaning on the invention according to the present disclosure.

[0319] This application is based on Japanese Patent Application No. 2021-088531, filed on May 26, 2021, the contents of which are incorporated herein in their entirety.

Claims

1. A receiving unit that receives setting information including a setting for a group-based beam report in a channel state information (CSI) report; a control unit that controls the CSI report based on the setting information, The configuration information includes a resource type configuration for a time domain; the number of resource sets for the CSI reporting is two for any of the plurality of resource types; the receiver receives upper layer parameters indicating a list of aperiodic trigger conditions; The terminal, wherein the two resource sets are associated with one trigger state based on the higher layer parameter.

2. The terminal described in claim 1, wherein the plurality of resource types include periodic and semi-persistent resources.

3. A step of receiving configuration information including a group-based beam reporting configuration in a channel state information (CSI) report; receiving upper layer parameters indicating a list of aperiodic trigger conditions; and controlling the CSI reporting based on the configuration information. The configuration information includes a resource type configuration for a time domain; the number of resource sets for the CSI reporting is two for any of the plurality of resource types; The wireless communication method for a terminal, wherein two of the resource sets are associated with one trigger state based on the higher layer parameter.

4. A transmitting unit that transmits setting information including a setting for a group-based beam report in a channel state information (CSI) report; a control unit that controls the CSI report based on the setting information, The configuration information includes a resource type configuration for a time domain; the number of resource sets for the CSI reporting is two for any of the plurality of resource types; the transmitter transmits upper layer parameters indicating a list of aperiodic trigger conditions; The base station, wherein the two resource sets are associated with one trigger state based on the higher layer parameters.

5. A system including a terminal and a base station, The terminal a receiving unit for receiving configuration information including a configuration of a group-based beam report in a channel state information (CSI) report; a control unit that controls the CSI report based on the setting information, The configuration information includes a resource type configuration for a time domain; the number of resource sets for the CSI reporting is two for any of the plurality of resource types; the receiver receives upper layer parameters indicating a list of aperiodic trigger conditions; two of the resource sets are associated with one trigger state based on the higher layer parameters; The base station A system having a transmitting unit that transmits the setting information.

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