Terminal, wireless communication method, and base station

Abstract

A terminal according to one aspect of the present disclosure is characterized by comprising: a reception unit that, when a group-based beam report is configured, receives a configuration for a channel state information (CSI) report; and a control unit that, on the basis of the configuration, controls transmission of the CSI report including a plurality of first fields indicating a beam index corresponding to a channel measurement resource (CMR) indexed across a plurality of CMR groups and a plurality of second fields indicating an ID of a joint report group including a plurality of CMRs. According to the one aspect of the present disclosure, it is possible to suitably perform beam measurement / reporting.

Description

Terminal, wireless communication method and base station

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

[0002] Long Term Evolution (LTE) has been specified for the Universal Mobile Telecommunications System (UMTS) network with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Also, LTE-Advanced (3GPP Rel. 10-14) has been specified with the aim of achieving higher capacity and more advanced features than LTE (Third Generation Partnership Project (3GPP (registered trademark)) 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, etc.) are also being considered.

[0004] 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

[0005] In future wireless communication systems (e.g., Rel. 20 and later), cell-free communication is being considered, in which terminals (user terminals, User Equipment (UE)) communicate using units smaller than existing cells.

[0006] However, there has been insufficient consideration of beam measurement / reporting in cell-free communication, which may result in a decrease in communication throughput.

[0007] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately perform beam measurement / reporting.

[0008] A terminal according to one aspect of the present disclosure is characterized in that it has a receiving unit that receives a configuration for a channel state information (CSI) report when group-based beam reporting is configured, and a control unit that controls, based on the configuration, the transmission of the CSI report, which includes a plurality of first fields indicating beam indices corresponding to CMRs indexed across a plurality of channel measurement resource (CMR) groups, and a plurality of second fields indicating the ID of a joint reporting group including a plurality of CMRs.

[0009] According to one aspect of the present disclosure, beam measurement / reporting can be performed appropriately.

[0010] Figures 1A and 1B are diagrams showing examples of RRC information elements related to CSI reporting configuration and CSI resource configuration. Figures 2A and 2B are diagrams showing examples of RRC information elements related to NZP CSI-RS resource sets and CSI-SSB resource sets. Figure 3 is a diagram showing examples of RRC information elements related to TCI states. Figure 4 is a diagram showing an example of the RRC information element "CSI-ReportConfig" in Rel. 16. Figure 5 is a diagram showing an example of a CSI report in Rel. 15 NR. Figure 6 is a diagram showing an example of a CSI report when performing enhanced group-based beam reporting. Figures 7A and 7B are diagrams showing an overview of MIMO. Figures 8A and 8B are diagrams showing an overview of a cellular system. Figures 9A-9C are diagrams showing an example of an overview of assumption 1 of a cell-free configuration. Figures 10A and 10B are diagrams showing examples of CMR groups and CMRs. Figures 11A and 11B are diagrams showing examples of CMR groups and CMRs. FIGS. 12A and 12B are diagrams showing an example of a CMR group and a CMR. FIGS. 13A and 13B are diagrams showing an example of a CMR group and a CMR. FIGS. 14A to 14C are diagrams showing an example of a CSI report. FIGS. 15A to 15C are diagrams showing an example of a CSI report. FIG. 16 is a diagram showing an example of a CMR group and a CMR. FIG. 17 is a diagram showing an example of a CMR group and a CMR. FIG. 18 is a diagram showing an example of a CMR group and a CMR. FIG. 19 is a diagram showing an example of a CMR group and a CMR. FIGS. 20A and 20B are diagrams showing an example of a CSI report. FIG. 21 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 22 is a diagram showing an example of a configuration of a base station according to an embodiment. FIG. 23 is a diagram showing an example of a configuration of a user terminal according to an embodiment. FIG. 24 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. FIG. 25 is a diagram showing an example of a vehicle according to an embodiment.

[0011] (CSI) In NR, the UE measures the channel state using a reference signal (or a resource for the reference signal) and feeds back (reports) channel state information (CSI) to the 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 resource may include at least one of a Non Zero Power (NZP) CSI-RS resource, a Zero Power (ZP) CSI-RS resource, and a CSI Interference Measurement (CSI-IM) resource.

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

[0015] A resource for measuring interference components 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), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), L1-SNR (Signal to Noise Ratio), 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), and 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 I CSI, single-beam CSI, etc.) and a CSI type set for communication using multiple beams (also referred to as type II CSI, multi-beam CSI, etc.) may be defined. The use of CSI types is not limited to this.

[0020] As CSI feedback methods, periodic CSI (P-CSI) reporting, aperiodic CSI (A-CSI) reporting, semi-persistent CSI (SP-CSI) reporting, etc. are being considered.

[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, etc., 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 relates to resources for CSI measurement, and the CSI reporting configuration information relates to how the UE performs CSI reporting.

[0026] 1A and 1B are diagrams illustrating an example of RRC information elements related to CSI reporting configuration and CSI resource configuration. In this example, excerpts of fields (which may also be referred to as parameters) included in the information elements are illustrated. 1A and 1B are written using ASN.1 (Abstract Syntax Notation One) notation. Note that other figures relating to RRC information elements (or RRC parameters) in the present disclosure are also written using the same notation.

[0027] As shown in FIG. 1A , 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").

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

[0029] 1B , the CSI resource configuration information (“CSI-ResourceConfig”) may include a CSI resource configuration information ID, CSI-RS resource set list information (“csi-RS-ResourceSetList”), a resource type (“resourceType”), etc. The CSI-RS resource set list may 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] When interference measurements are performed on CSI-IM, each CSI-RS for channel measurements 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"), which 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] The NZP CSI-RS resource set list information ("nzp-CSI-RS-ResourceSetList") may include an NZP CSI-RS resource set ID ("NZP-CSI-RS-ResourceSetId") of the maximum number of NZP CSI-RS resource sets per CSI resource configuration ("maxNrofNZP-CSI-RS-ResourceSetsPerConfig"), which may be up to 16 if the resource type is "aperiodic" and 1 otherwise (if the resource type is "semi-persistent" or "periodic").

[0035] The SSB resource set list information for CSI measurements ("csi-SSB-ResourceSetList") may include the CSI-SSB resource set IDs ("CSI-SSB-ResourceSetId") of the maximum number of SSB resource sets for CSI measurements per CSI resource configuration ("maxNrofCSI-SSB-ResourceSetsPerConfig"). The maximum number of SSB resource sets for CSI measurements per CSI resource configuration ("maxNrofCSI-SSB-ResourceSetsPerConfig") may be 1.

[0036] The CSI-IM resource set list information ("csi-IM-ResourceSetList") may include the CSI-IM resource set ID ("CSI-IM-ResourceSetId") of the maximum number of CSI-IM resource sets per CSI resource configuration ("maxNrofCSI-IM-ResourceSetsPerConfig"), which may be up to 16 if the resource type is "aperiodic" and 1 otherwise.

[0037] 2A and 2B are diagrams illustrating example RRC information elements for NZP CSI-RS resource sets and CSI-SSB resource sets.

[0038] As shown in FIG. 2A , 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”).

[0039] 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). The TCI state will be described later.

[0040] As shown in Figure 2B, 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.

[0041] FIG. 3 is a diagram showing an example of RRC information elements related to the TCI state.

[0042] The TCI state is information about the Quasi-Co-Location (QCL) of a channel or a signal, and may also be called spatial reception parameters, spatial relation info, etc. The TCI state may be configured or specified to the UE on a per-channel or per-signal basis.

[0043] As shown in Fig. 3, 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 on 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), a serving cell index, and an index of a BWP (Bandwidth Part) where the RS is located.

[0044] 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.

[0045] As shown in Figure 2A, 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.

[0046] (TCI, spatial relationship, QCL) In NR, it is considered to control the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and encoding) in a UE of at least one of a signal and a channel (referred to as a signal / channel) based on a transmission configuration indication state (TCI state).

[0047] The TCI state may represent that which is applied to a downlink signal / channel, and the equivalent of the TCI state that is applied to an uplink signal / channel may be expressed as a spatial relation.

[0048] The TCI state is information about the Quasi-Co-Location (QCL) of signals / channels, and may also be called spatial reception parameters, spatial relation information, etc. The TCI state may be configured in the UE for each channel or signal.

[0049] The QCL is an index indicating the statistical properties of signals / channels. For example, if a signal / channel has a QCL relationship with another signal / channel, it may mean that it can be assumed that at least one of a Doppler shift, a Doppler spread, an average delay, a delay spread, and a spatial parameter (e.g., a spatial Rx parameter) is the same between these different signals / channels (i.e., the signals / channels have a QCL with respect to at least one of these).

[0050] The spatial reception parameters may correspond to a reception beam (e.g., a reception analog beam) of the UE, and the beam may be identified based on a spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure may be replaced with sQCL (spatial QCL).

[0051] A plurality of types (QCL types) of QCL may be defined. For example, four QCL types A to D may be provided, each having different parameters (or parameter sets) that can be assumed to be the same. The parameters (which may be referred to as QCL parameters) are as follows: QCL type A (QCL-A): Doppler shift, Doppler spread, mean delay, and delay spread QCL type B (QCL-B): Doppler shift and Doppler spread QCL type C (QCL-C): Doppler shift and mean delay QCL type D (QCL-D): Spatial reception parameters.

[0052] The UE's assumption that a Control Resource Set (CORESET), channel, or reference signal has a specific QCL (e.g., QCL type D) relationship with another CORESET, channel, or reference signal may be referred to as a QCL assumption.

[0053] The UE may determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) for a signal / channel based on the TCI condition or QCL assumption of the signal / channel.

[0054] The TCI state may be, for example, information about the QCL between the channel of interest (in other words, the Reference Signal (RS) for that channel) and another signal (e.g., another RS). The TCI state may be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

[0055] The channel / signal to which the TCI state is applied may be called a target channel / reference signal (target channel / RS), or simply a target, and the other signal may be called a reference reference signal (reference RS), a source RS, or simply a reference.

[0056] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), a physical uplink shared channel (PUSCH), and a physical uplink control channel (PUCCH).

[0057] Furthermore, the RS that has a QCL relationship with the channel may be at least one of, for example, a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a sounding reference signal (SRS), a tracking CSI-RS (also called a tracking reference signal (TRS)), a QCL detection reference signal (also called a QRS), a demodulation reference signal (DMRS), etc.

[0058] An SSB is a signal block including at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). An SSB may also be referred to as an SS / PBCH block.

[0059] An RS of QCL type X in a TCI state may refer to an RS that has a QCL type X relationship with a certain channel / signal (DMRS), and this RS may be called a QCL source of QCL type X in the TCI state.

[0060] (Beam Management) In Rel. 15 NR, a method of Beam Management (BM) has been considered. 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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).

[0065] CSI reporting may be performed based on a CSI reporting configuration set by higher layer parameters. Figure 4 shows an example of the RRC information element "CSI-ReportConfig" in Rel. 16. Figure 4 shows another excerpt from the same CSI reporting configuration information (CSI-ReportConfig) as Figure 1A.

[0066] 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 (cri-RSRP, ssb-Index-RSRP, etc.) defined as the report quantity is set.

[0067] A UE in which an upper layer parameter included in the CSI reporting setting 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 setting 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.

[0068] A UE with groupBasedBeamReporting enabled reports CRI / SSBRI for each reporting configuration on a group basis (e.g., one group of CRI / SSBRI). The group includes multiple (e.g., two) CRI / SSBRI. The multiple (e.g., two) CRI / SSBRI may be received simultaneously by the UE.

[0069] For example, a UE with groupBasedBeamReporting enabled may include, for each reporting configuration, two different beam measurement resource IDs (e.g., CRI / SSBRI) and two measurement results (e.g., L1-RSRP) corresponding to the respective IDs in a beam report. The two beam measurement resources (CSI-RS resource, SSB resource) may be simultaneously received by the UE using one spatial domain receive filter or multiple simultaneous spatial domain receive filters.

[0070] 2A may include information regarding repetition of resources within the resource set. The information regarding 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 cri-RSRP and ssb-index-RSRP reporting parameters are related to beam management. A UE configured with cri-RSRP as the reporting parameter reports a CRI and the L1-RSRP corresponding to the CRI. A UE configured with ssb-index-RSRP as the reporting parameter reports an SSBRI and the L1-RSRP corresponding to the SSBRI.

[0074] Fig. 5 is a diagram illustrating an example of a CSI report in Rel. 15 NR. Fig. 5 illustrates the mapping order of CSI fields included in one CSI report (n-th CSI report #n) for CSI / RSRP or SSBRI / RSRP reporting, as specified in Rel. 15.

[0075] The CSI report in Fig. 5 may include one or more pairs of CRI / SSBRI and RSRP, the number of which may be configured by a higher layer parameter (e.g., the RRC parameter "nrofReportedRS") indicating the number of reference signal resources to be reported.

[0076] For L1-RSRP reporting, if nrofReportedRS is set to 1 (value 'n1'), RSRP#1, a field of a predetermined number of bits (e.g., m bits) indicating the L1-RSRP of the largest measurement value, is included in the CSI report. In Rel. 15 NR, m=7.

[0077] For L1-RSRP reporting, if nrofReportedRS is set to a value 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 (k=2, 3, 4 in FIG. 5) 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.

[0078] 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.

[0079] Note that when groupBasedBeamReporting is enabled, the UE includes RSRP#1 and differential RSRP#2 in the same CSI report.

[0080] CRI / SSBRI#k in FIG. 5 is a field indicating the CRI / SSBRI corresponding to RSRP#k or differential RSRP#k (included when reporting RSRP#k or differential RSRP#k).

[0081] In addition, in NRs from Rel. 16 onwards, nrofReportedRS may be a value equal to or greater than 4. A CSI report may include four or more sets of CRI / SSBRI and RSRP. The above m, n etc. are not limited to 7 and 4, respectively.

[0082] In addition, in NRs from Rel. 16 onwards, L1-SINR reporting may be performed. For the L1-SINR report, the RSRP in the above-mentioned L1-RSRP report may be replaced with SINR. In this case, the settings / parameters for SINR may be different from the settings / parameters for RSRP. For example, the above nrofReportedRS may be replaced with nrofReportedRSForSINR, which indicates the number of reference signal resources to be reported for SINR.

[0083] For L1-RSRP computation, the UE may be configured with a CSI-RS resource setting of up to 16 CSI-RS resource sets, with each resource set containing up to 64 resources. The total number of different CSI-RS resources across all resource sets may be up to 128.

[0084] For L1-SINR computation, in channel measurements, the UE may be configured with a CSI-RS resource setting of up to 16 CSI-RS resource sets, including a total of up to 64 CSI-RS resources or up to 64 SS / PBCH blocks.

[0085] For a UE configured with information about the CSI aperiodic trigger state list (higher layer parameter "CSI-AperiodicTriggerStateList"), if a resource setting linked to a CSI-ReportConfig has multiple aperiodic resource sets, only one of the aperiodic CSI-RS resources of the resource setting may be associated with a trigger state. In this case, the UE may be configured by a higher layer for each trigger state and for each resource setting to select one CSI-IM / NZP CSI-RS resource set from the resource setting.

[0086] The UE does not need to expect or assume that more than 64 NZP CSI-RS resources and / or SS / PBCH block resources are configured in the channel measurement resource setting of the CSI-ReportConfig in which the report quantity (higher layer parameter reportQuantity) is set to "none", "cri-RI-CQI", "cri-RSRP", "ssb-Index-RSRP", "cri-SINR", or "ssb-Index-SINR".

[0087] If a UE is configured with a CSI-ReportConfig in which the report quantity (higher layer parameter reportQuantity) is set to "cri-RSRP", "cri-SINR", or "none", and this CSI-ReportConfig is linked to a resource setting in which the higher layer parameter resourceType is set to "aperiodic", the UE may not assume that more than 16 CSI-RS resources are configured in the CSI-RS resource set included in this resource setting.

[0088] When a CSI-ReportConfig with the report quantity (higher layer parameter reportQuantity) set to "cri-RSRP", "cri-RI-PMI-CQI", "cri-RI-i1", "cri-RI-i1-CQI", "cri-RI-CQI", "cri-RI-LI-PMI-CQI", or "cri-SINR" is configured for a UE and two or more resources for channel measurement are configured in the corresponding resource set, the UE may derive CSI parameters other than the CRI based on the reported CRI. Here, CRI k (k≧0) may correspond to the configured k+1-th entry of the associated nzp-CSI-RS-Resources in the NZP-CSI-RS-ResourceSet for the corresponding channel measurement and the k+1-th entry of the associated csi-IM-Resource in the csi-IM-ResourceSet, or the k+1-th entry of the associated nzp-CSI-RS-Resources in the NZP-CSI-RS-ResourceSet for the corresponding interference measurement (when reportQuantity is set to "cri-SINR" in the CSI-ReportConfig). If two CSI-RS resources are configured, each resource may include up to 16 CSI-RS ports. If three to eight CSI-RS resources are configured, each resource may include up to eight CSI-RS ports.

[0089] If the UE is configured with a CSI-ReportConfig with the reporting quantity (higher layer parameter reportQuantity) set to "ssb-Index-RSRP", it may report an SSBRI, where SSBRI k (k≧0) may correspond to the k+1-th entry configured in the associated csi-SSB-ResourceList in the corresponding CSI-SSB-ResourceSet.

[0090] If the UE is configured with a CSI-ReportConfig with the report quantity (higher layer parameter reportQuantity) set to "ssb-Index-SINR", it may derive the L1-SINR conditioned on the reported SSBRI, where SSBRI k (k≧0) may correspond to the configured k+1-th entry of the associated csi-SSB-ResourceList in the corresponding CSI-SSB-ResourceSet for channel measurement and the k+1-th entry of the associated csi-IM-Resource in the csi-IM-ResourceSet, or the k+1-th entry of the associated nzp-CSI-RS-Resources in the corresponding NZP-CSI-RS-ResourceSet for interference measurement.

[0091] (Extended group-based beam reporting) For future wireless communication systems (e.g., Rel. 17 and later), beam management-related extensions (e.g., beam reports suitable for multiple TRPs, which may also be called extended group-based beam reporting) are being considered for user terminals (user terminals, User Equipment (UE)) with multiple panels (multi-panels), multiple transmission / reception points (multi-TRPs), etc.

[0092] The above-mentioned groupBasedBeamReporting can report a group including multiple (e.g., two) CRIs / SSBRIs in one report, and is therefore suitable for cases where multi-TRP transmission, multi-panel reception, etc. are applied. For example, it can be used to report the best beam for TRP1 as RSRP#1 and the best beam for TRP2 as differential RSRP#2.

[0093] In Rel. 15 and 16, a UE with group-based beam reporting enabled can report only one group containing two different CRIs / SSBRIs (which may be read as beam indices) for each reporting configuration. Therefore, it is expected that the number of groups that can be reported by group-based beam reporting will be expanded for Rel. 17.

[0094] For example, two resource sets for channel measurement (e.g., CMR sets) may be configured / triggered to periodic / semi-persistent / aperiodic resource types. The two resource sets for channel measurement (e.g., CMR sets) may be, for example, two CSI-SSB resource sets / two NZP-CSI-RS resource sets. The UE may be configured to be able to report up to four CRI / SSBRI groups. Note that the number of groups that can be reported (or the number of candidates (1 / 2 / 3 / 4)) may be configured by higher layer parameters.

[0095] Each group may have multiple (e.g., two) CRIs / SSBRIs, and the CRIs / SSBRIs in each group may be selected from two CSI resource sets for reporting settings, respectively. The two CRIs / SSBRIs in each group may also mean that the UE can receive them simultaneously (e.g., simultaneously using one spatial domain receive filter).

[0096] 6 is a diagram illustrating an example of a CSI report when performing extended group-based beam reporting. In FIG. 6, a mapping order of CSI fields included in one report (e.g., n-th CSI report #n) for group-based CSI / RSRP or SSBRI / RSRP reporting is shown.

[0097] A CSI report may include up to X (e.g., X=4) resource groups. Each group includes multiple (e.g., two) CRIs / SSBRIs. Here, a case is shown in which CRI or SSBRI#1 and CRI or SSBRI#2 are reported for each resource group.

[0098] A resource set index (e.g., Resource Set Indicator) may be included in the CSI field. The value of the resource set index may indicate the channel measurement resource set from which the CRI or SSBRI#1 of the first resource group is reported. For example, a 1-bit resource set index having a value of 0 or 1 indicates the first or second channel measurement resource set, respectively, from which the CRI or SSBRI#1 of the first resource group may be reported. All remaining resource groups (e.g., if there are other resource groups to be reported) follow the same mapping order as the first resource group. For example, the CRI or SSBRI#1 of all remaining resource groups may be reported (or selected) from the channel measurement resource set indicated by the resource set index.

[0099] That is, the CRI or SSBRI#1 of each group may be reported (or selected) from a resource set indicated by a resource set index (e.g., Resource set indicator), and the CRI or SSBRI#2 may be reported (or selected) from another resource set. In this way, in all resource groups, the CRI or SSBRI#1 and the CRI or SSBRI#2 may be reported from different channel measurement resource sets.

[0100] Also, the RSRP corresponding to the beam index (e.g., CRI or SSBRI) of each resource group is reported. For example, the RSRP of the CRI or SSBRI of a specific group may be reported, and the difference between the RSRP of the CRI or SSBRI of the specific group and the other RSRP may be reported. The RSRP of the CRI or SSBRI of the specific group may be the RSRP of the CRI or SSBRI #1 of the first resource group.

[0101] The enhanced group-based beam reporting may be configured (or enabled / activated) by a predetermined higher layer parameter (e.g., groupBasedBeamReporting-r17). Alternatively, the enhanced group-based beam reporting may be determined to be enabled when a higher layer parameter (e.g., nrofReportedGroups-r17) regarding the number of groups to report is configured.

[0102] (Event-based beam reporting) It is being considered that future wireless communication systems will support event-based beam reporting. Event-based beam reporting may also be called event-triggered beam reporting, and may mean UE-initiated beam reporting.

[0103] <Applicable Cases> Event-based beam reporting may be applied, for example, in at least one of the following Case 1 or Case 2: - [Case 1]: L1-RSRP / SINR beam reporting including serving cell PCI / additional PCI (e.g., L1-RSRP / SINR beam reporting including serving cell / additional PCI cells for Rel. 18 L1 / L2 mobility with L1 / L2 inter-cell mobility / intra-cell multi-TRP (M-TRP inter-cell) / cell switching). - [Case 2]: L1-RSRP / SINR beam reporting including only serving cell PCI.

[0104] When a specific event occurs (which in the present disclosure may be interpreted as a specific condition being met / not being met), the UE may report measurement results (e.g., L1-RSRP / L1-SINR) to the NW (e.g., base station).

[0105] The particular event may be, for example, at least one of an event relating to the serving cell and / or the additional cell, and an event relating to a beam report including at least one of the PCI of the serving cell and / or the PCI of the additional cell.

[0106] (Cell-free) Existing wireless communication systems (e.g., 5G NR) have adopted a cellular system in which one cell is formed by one antenna / transmitting / receiving point (TRP). The area formed by the cell is fixed / static.

[0107] In addition, existing wireless communication systems (e.g., Rel. 16 and later) have introduced distributed multi-input multi-output (Distributed MIMO, e.g., multi-TRP using multiple TRPs), which forms a communication area using the coverage of multiple antennas / TRPs. Distributed MIMO allows simultaneous communication using multiple antennas / TRPs and communication using one antenna / TRP.

[0108] By adopting distributed MIMO, it is possible to create a more favorable line-of-sight environment and improve MIMO performance.

[0109] 7A and 7B are diagrams illustrating an overview of MIMO. Fig. 7A illustrates an example of co-located MIMO. In co-located MIMO, one UE communicates with one antenna / TRP.

[0110] On the other hand, Figure 7B illustrates an example of distributed MIMO, in which one UE communicates with multiple antennas / TRPs in cooperation with each other.

[0111] In future wireless communication systems (e.g., Rel. 20 and later), the introduction of cell-free communication is being considered with the aim of further improving performance and energy efficiency through reducing interference between multiple antennas / TRPs, creating a line-of-sight environment for high-frequency use, improving frequency utilization efficiency throughout the system, and applying equal, high-quality communication to each user.

[0112] Self-Free may also be referred to as cell-free massive MIMO (mMIMO) or large-scale distributed MIMO (D-MIMO). Self-Free uses coherent cooperation of multiple access points. Self-Free may include at least one of ultra-dense deployment, scalable cooperation, user-centric clustering, super-carrier aggregation, and analog fronthaul. The user plane for cell-free may perform more flexible scheduling than existing scheduling. The control plane for cell-free may maintain some form of cell to facilitate signaling.

[0113] In cell-free, unlike conventional cellular systems, one area (which may be called a cell / sub-cell, etc.) may be formed by multiple antennas / TRPs. In other words, the area may mean a cell that is independent of the location of the antenna / TRP.

[0114] In cell-free, the set of antennas / TRPs used to form a coverage area may be changed according to the needs of UEs. For example, the set of antennas / TRPs may be changed based on the number of UEs, the number of traffic, communication purposes (e.g., initial access, data communication, measurement, reporting, etc.), etc., rather than the coverage of the antennas / TRPs.

[0115] In other words, in cell-free, the coverage between multiple antennas / TRPs may overlap.

[0116] In cell-free mode, the direction in which a synchronization signal (which may also be called, for example, a synchronization signal block (SSB), a synchronization signal / physical broadcast channel (SS / PBCH) block, etc.) is transmitted may be controlled for each antenna / TRP.

[0117] In addition, in cell-free, a central unit (CU) / distributed unit (DU) may be virtualized for each antenna, or each antenna may be managed by only the CU.

[0118] Fig. 8A is a diagram showing an overview of a cellular system, in which cells formed by each antenna / TRP are shown, and UEs communicate based on these cells.

[0119] On the other hand, Figure 8B is a diagram showing an overview of a cell-free system. In the example shown in Figure 8B, the installed antennas / TRPs do not form fixed / static cells in a cellular system. As shown in Figure 8B, in a cell-free system, one or more antennas / TRPs form areas according to conditions. Therefore, in a cell-free system, each antenna / TRP does not need to correspond to the same physical cell ID, and the areas between multiple antennas / TRPs may overlap.

[0120] Self-regulation may be achieved, for example, by coordinating a set of antennas / TRPs controlled by a central control unit (e.g., CU).

[0121] In a cell-free system, a first cell (which may be called, for example, a cell / super cell / macro cell / large cell, etc.) with a fixed physical range like a cell in a 5G NR system, and a second cell (which may be called, for example, a subcell / area / micro cell / cell / small cell / second cell within the first cell, etc.) with a quasi-static / dynamic physical range that varies based on conditions may be formed.

[0122] For example, a first cell may be referred to as a supercell to distinguish it from a second cell. When a supercell is composed of multiple second cells, the second cells may have the same definition / operation / coverage as existing cells in NR. For example, a second cell may be referred to as a subcell to distinguish it from a first cell. When a supercell or a cell is composed of multiple subcells, the subcells may have the same definition / operation / coverage as existing cells in NR.

[0123] The first cell may be a cell that is newly defined in a future wireless communication system, or may be a cell defined in an existing wireless communication system that is reused.

[0124] The configurations of the first cell and the second cell can be considered as follows: Assumption 1 and Assumption 2: The first cell is composed of multiple TRPs with one cell ID (physical cell ID (PCI)). The multiple TRPs can transmit and receive in coordination. Assumption 2: The first cell is composed of multiple TRPs (or sub-cells) with different cell IDs. The multiple TRPs / sub-cells can transmit and receive in coordination.

[0125] 9A is a diagram showing an example of the outline of the cell-free configuration assumption 1. In the example shown in FIG. 9A, each TRP included in the first cell (super cell / cell) has the same PCI (PCI #0). Multiple TRPs can communicate with one UE in a coordinated manner.

[0126] Figure 9B is a diagram showing an example of the outline of the cell-free configuration assumption 2. In the example shown in Figure 9B, each TRP included in the first cell (super cell / cell) has a different PCI (PCI #0 to #9). Multiple TRPs can communicate with one UE in a coordinated manner.

[0127] 9C is a diagram showing another example of the outline of the cell-free configuration assumption 2. In the example shown in FIG. 9C, a PCI is assigned to each TRP included in the first cell (supercell / cell). In the example shown in FIG. 9C, unlike the example in FIG. 9B, the same PCI may correspond to multiple TRPs. Multiple TRPs can communicate cooperatively with one UE.

[0128] Transmission / reception with TRP / subcell coordination may be based on at least one of the following schemes supported in NR: - Transmission of a single TRP / subcell with dynamic TRP / subcell switching (single-TRP transmission). - Joint transmission using multiple TRPs / subcells (multi-TRP joint transmission). The joint transmission may be based on a single DCI or multiple DCIs. The joint transmission may be non-coherent joint transmission (NCJT) or coherent joint transmission (CJT).

[0129] For cell-free, assuming ideal backhaul and tight coordination, in the joint transmission scheme, CJT may be prioritized over NCJT, and single DCI-based joint transmission may be prioritized over multi-DCI-based joint transmission.

[0130] To enable CJT / NCJT from multiple TRPs / sub-cells to a UE, the base station needs to know the best TRP / sub-cell and the best beam for each TRP / sub-cell.

[0131] However, there is insufficient consideration on how a base station can identify the best TRP / subcell and the best beam for each TRP / subcell. Specifically, there is insufficient consideration on non-group-based beam reporting and group-based beam reporting.

[0132] If these considerations are not sufficient, proper communication between the TRP / subcell and the UE may not be possible, resulting in a decrease in communication throughput.

[0133] Therefore, the present inventors came up with a method for solving the above problem.

[0134] 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.

[0135] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0136] In the present disclosure, terms such as notify, activate, deactivate, indicate (or indicate), select, configure, update, and determine may be read interchangeably. In the present disclosure, terms such as support, control, controllable, operate, and operate may be read interchangeably.

[0137] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0138] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., messages from the core network such as positioning protocol (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP)) messages), or a combination thereof.

[0139] In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. 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.

[0140] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0141] In the present disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In the present disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0142] In the present disclosure, the terms SSB, CSI-RS, TRS, SRS, Reference Signal (RS), panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmitting entity, Transmission / Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relation, SRS Resource Indicator (SRI), Control Resource Set (CORESET), Physical Downlink Shared Channel (PDSCH), Codeword (CW), Transport Block (TB), Reference Signal (RS), antenna port (e.g., Demodulation Reference Signal (DMRS) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relation group, Code Division Multiplexing The terms "CDM (Corrective Multiplexing) group," "reference signal group," "CORESET group," "Physical Uplink Control Channel (PUCCH) group," "PUCCH resource group," "resource (e.g., reference signal resource, SRS resource)," "resource set (e.g., reference signal resource set)," "CORESET pool," "downlink Transmission Configuration Indication state (TCI state)" (DL TCI state), "uplink TCI state" (UL TCI state), "unified TCI state," "common TCI state," "quasi-co-location (QCL)," "QCL assumption," and the like may be read as interchangeable.

[0143] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. The "spatial relationship information" may be interchangeable with "set of spatial relationship information," "one or more pieces of spatial relationship information," etc. The TCI state and the TCI may be interchangeable with each other.

[0144] In the present disclosure, the terms drop, abort, cancel, puncture, rate match, postpone, do not transmit, etc. may be read interchangeably.

[0145] In the present disclosure, CMR, CRI, SSBRI, beam, beam index, etc. may be read interchangeably.

[0146] In the present disclosure, the terms CMR group, TRP, cell, sub-cell, etc. may be interchangeable.

[0147] In the present disclosure, L1-RSRP, L1-SINR, L1-RSRQ, L3-RSRP (Layer 3 Reference Signal Received Power), L3-SINR (Layer 3 Signal to Interference plus Noise Ratio), L3-RSRQ (Layer 3 Reference Signal Received Quality), filtered L1 measurement, extended L1 measurement, etc. may be read as interchangeable terms.

[0148] In the present disclosure, the following cases may be interchangeable: when an upper layer parameter included in the CSI reporting configuration information (e.g., the RRC parameter "groupBasedBeamReporting" regarding group-based beam reporting) is set to disabled; when an upper layer parameter included in the CSI reporting configuration information (e.g., the RRC parameter "groupBasedBeamReporting" regarding group-based beam reporting) is not set to enabled; when group-based beam reporting is not configured; when non-group-based beam reporting is configured; etc.

[0149] In the present disclosure, the following cases may be interchangeable: when an upper layer parameter included in the CSI reporting configuration information (e.g., the RRC parameter "groupBasedBeamReporting" regarding group-based beam reporting) is set to enabled; when an upper layer parameter included in the CSI reporting configuration information (e.g., the RRC parameter "groupBasedBeamReporting" regarding group-based beam reporting) is not set to disabled; when group-based beam reporting is configured; when non-group-based beam reporting is not configured.

[0150] In the present disclosure, the terms CSI-IM resource, non-zero power (NZP)-interference measurement resource (IMR), zero power (ZP)-interference measurement resource (IMR), ZP CSI-RS resource, etc. may be interchangeable.

[0151] (Wireless Communication Method) <First Embodiment> The first embodiment relates to non-group-based beam reporting.

[0152] [Embodiment 1.1] When non-group-based beam reporting is configured, multiple groups of multiple CMRs (SSB / CSI-RS) (e.g., X CMR groups) may be configured for CSI resource configuration for channel measurement for L1-RSRP / L1-SINR-based beam measurement / reporting. Each CMR group may include the same number of CMRs. For example, each CMR group may include Y CMRs (Y CMRs may be configured for each CMR group). The UE may select / report M CMR groups, each CMR group including N CMRs. In other words, the UE may select / report M×N CMRs from among the multiple CMRs in the M CMR groups.

[0153] The X / Y / M / N may be set by RRC signaling or may be defined by specifications, and the maximum value of X / Y / M / N may be defined by specifications or may be reported to the base station by UE capability information.

[0154] One CMR group may mean one TRP / subcell. In other words, the terms CMR group, TRP, and subcell may be interchangeable. The base station may configure beam measurements for multiple TRPs / subcells (X TRPs / subcells), where each TRP / subcell has multiple beams (Y beams). The UE may select / report the best N beams for each of the best M TRPs / subcells.

[0155] 10A and 10B are diagrams showing an example of CMR groups and CMRs. In Fig. 10A, five CMR groups (CMR groups 1-5) are set, and the same number of CMRs (here, four) are set for each CMR group.

[0156] The UE selects / reports one or more CMR groups and one or more CMRs from among the multiple CMR groups and multiple CMRs in Fig. 10A. In Fig. 10B, the UE selects / reports four CMR groups (CMR groups 1, 2, 4, and 5) from among the five CMR groups (CMR groups 1-5) in Fig. 10A, and selects / reports one CMR per CMR group from among the four CMRs included in each of the four CMR groups (CMR groups 1, 2, 4, and 5).

[0157] In the configuration of a CMR, the CMR group ID may be explicitly set, in which case the CMR group ID may be associated with the ID of the corresponding TRP / subcell.

[0158] In the configuration of a CMR, the CMR group ID may not be explicitly set, in which case the CMR group may be identified by the ID of the corresponding TRP / subcell.

[0159] CMRs contained in different CMR groups may be transmitted simultaneously over the network.

[0160] According to the above-described embodiment 1.1, the UE can appropriately select / report the CMR.

[0161] [Embodiment 1.2] When non-group-based beam reporting is configured, multiple groups of multiple CMRs (SSB / CSI-RS) (e.g., X CMR groups) may be configured for CSI resource configuration for channel measurement for L1-RSRP / L1-SINR-based beam measurement / reporting. Each CMR group may contain a different number of CMRs. The maximum number of CMRs configured per CMR group may be specified by a specification or may be determined based on UE capabilities. The maximum number of CMRs configured across multiple / all CMR groups may be specified by a specification or may be determined based on UE capabilities. The UE may select / report K CMRs from all configured CMR groups (in other words, across all configured CMR groups). The maximum number of CMRs reported per CMR group may be specified by a specification, configured by RRC signaling, or determined based on UE capabilities. The maximum number of CMRs reported across multiple / all CMR groups may be specified by the specification, configured by RRC signaling, or determined based on UE capabilities.

[0162] The X / K may be set by RRC signaling or may be defined by specifications, and the maximum value of X / K may be defined by specifications or may be reported to the base station by UE capability information.

[0163] One CMR group may mean one TRP. In other words, the CMR group and the TRP may be interchangeable. If the number of configured beams for each TRP is different, the base station may configure only the total number of CMRs to be reported for the reporting configuration.

[0164] 11A and 11B are diagrams showing an example of CMR groups and CMRs. In Fig. 11A, five CMR groups (CMR groups 1-5) are set, and one or more CMRs are set for each CMR group. The number of CMRs set for each CMR group may be the same or different.

[0165] The UE selects / reports one or more CMR groups and one or more CMRs from among the multiple CMR groups and multiple CMRs set in Fig. 11A. In Fig. 11B, the UE selects / reports three CMR groups (CMR groups 1, 2, and 4) from among the five CMR groups (CMR groups 1-5) set in Fig. 11A, and selects / reports a total of four CMRs from among the multiple (eight in this case) CMRs included in the three CMR groups (CMR groups 1, 2, and 4).

[0166] In the configuration of a CMR, a CMR group ID may be explicitly set, in which case the CMR group ID may be associated with the ID of the corresponding TRP.

[0167] In the CMR configuration, the CMR group ID may not be explicitly set, in which case the CMR group may be identified by the ID of the corresponding TRP.

[0168] According to the above-described embodiment 1.2, the UE can appropriately select / report the CMR.

[0169] [Embodiment 1.3A] When non-group-based beam reporting is configured, multiple groups of multiple CMRs (SSB / CSI-RS) (e.g., X CMR groups) may be configured for CSI resource configuration for channel measurement for L1-RSRP / L1-SINR-based beam measurement / reporting. Each CMR group may include the same number of CMRs. For example, Y CMRs may be configured for each CMR group (each CMR group may include Y CMRs). The UE may select / report K CMRs from all configured CMR groups (in other words, across all configured CMR groups). The maximum number of CMRs reported per CMR group may be specified by a specification, configured by RRC signaling, or determined based on UE capabilities. The maximum number of reported CMRs across multiple / all CMR groups (max value of K) may be specified by the specification, configured by RRC signaling, or determined based on UE capabilities.

[0170] The X / Y / K may be set by RRC signaling or may be defined by a specification, and the maximum value of X / Y / K may be defined by a specification or may be reported to the base station by UE capability information.

[0171] 12A and 12B are diagrams showing an example of CMR groups and CMRs. In Fig. 12A, five CMR groups (CMR groups 1-5) are set, and the same number of CMRs (here, four) are set for each CMR group.

[0172] The UE selects / reports one or more CMR groups and one or more CMRs from among the multiple CMR groups and multiple CMRs set in Fig. 12A. In Fig. 12B, the UE selects / reports three CMR groups (CMR groups 1, 2, and 4) from among the five CMR groups (CMR groups 1-5) set in Fig. 12A, and selects / reports a total of four CMRs from among the multiple (here, 12) CMRs included in the three CMR groups (CMR groups 1, 2, and 4).

[0173] According to the above-described embodiment 1.3A, the UE can appropriately select / report the CMR.

[0174] [Embodiment 1.3B] When non-group-based beam reporting is configured, multiple groups of multiple CMRs (SSB / CSI-RS) (e.g., X CMR groups) may be configured for CSI resource configuration for channel measurement for L1-RSRP / L1-SINR-based beam measurement / reporting. Each CMR group may contain a different number of CMRs. The UE may select / report M CMR groups, each containing N CMRs. In other words, the UE may select / report M×N CMRs from among the multiple CMRs in the M CMR groups. The maximum number of CMRs (N) configured per CMR group may be specified by specifications or may be determined based on UE capabilities. The maximum number of CMRs (M×N) configured across multiple / all CMR groups may be specified by specifications or may be determined based on UE capabilities. N may be equal to or less than the number of CMRs set in the CMR group with the fewest number of CMRs set among the set CMR groups.

[0175] The X / M / N may be set by RRC signaling or may be defined by specifications, and the maximum value of X / M / N may be defined by specifications or may be reported to the base station by UE capability information.

[0176] 13A and 13B are diagrams showing an example of CMR groups and CMRs. In Fig. 13A, five CMR groups (CMR groups 1-5) are set, and one or more CMRs are set for each CMR group. The number of CMRs set for each CMR group may be the same or different.

[0177] The UE selects / reports one or more CMR groups and one or more CMRs from among the multiple CMR groups and multiple CMRs set in Fig. 13 A. In Fig. 13B, the UE selects / reports four CMR groups (CMR groups 1, 2, 4, and 5) from among the five CMR groups (CMR groups 1-5) set in Fig. 13 A, and selects / reports one CMR per CMR group from among the multiple (here, 10) CMRs included in the four CMR groups (CMR groups 1, 2, 4, and 5).

[0178] According to the above-described embodiment 1.3B, the UE can appropriately select / report the CMR.

[0179] [Embodiment 1.4] Restrictions may be set for configured CMRs per CMR group (i.e., within the same CMR group) and / or for configured CMRs of different CMR groups. The restrictions may depend on UE capability reporting and / or network configuration.

[0180] Restrictions on the type / kind of reference signals may be placed. The restriction may be either option 1 or option 2 below: Option 1: The type of reference signals for multiple CMRs in all CMR groups is the same. Option 2: The type of reference signals for multiple CMRs in one CMR group is the same, and the type of reference signals for multiple CMRs in different CMR groups may be the same or different.

[0181] With respect to option 1, for example, in one reporting configuration, only SSB or only CSI-RS may be used as reference signals for multiple CMRs in all CMR groups.

[0182] With regard to option 2, for example, only one of SSB or CSI-RS may be used as a reference signal for multiple CMRs in a first CMR group, and in this case, only one of SSB or CSI-RS may be used as a reference signal for multiple CMRs in a second CMR group.

[0183] Restrictions on the Physical Cell Identifier (PCI) may be set. The restriction may be at least one of the following options 1 to 3: Option 1: Multiple CMRs in one CMR group are associated with the same PCI. Option 2: In the intra-cell case, multiple CMRs in different CMR groups are associated with the same PCI. Option 3: In the inter-cell case, multiple CMRs in different CMR groups are associated with the same or different PCI.

[0184] Restrictions on QCL source RSs may be set. When multiple CSI-RSs are configured as multiple CMRs, the QCL source RSs of multiple CMRs in one CMR group may be restricted to one and the same SSB.

[0185] Restrictions on Timing Advance (TA) / Timing Advance Group (TAG) may be imposed. The restrictions may be either Option 1 or Option 2 below: Option 1: Multiple CMRs in one CMR group (or multiple TCI states associated with multiple CMRs in one CMR group) are associated with the same TA / TAG. Multiple CMRs in different CMR groups (or multiple TCI states associated with multiple CMRs in different CMR groups) are associated with different TA / TAG. Option 2: All CMRs in different CMR groups (or multiple TCI states associated with multiple CMRs in different CMR groups) are associated with the same TA / TAG.

[0186] A restriction on the TA offset value (e.g., n-TimingAdvanceOffset) may be set. The restriction may be at least one of the following options 1 to 3: Option 1: One TA offset value is set for each CMR group. In this case, the TA offset value may be the same or different between multiple CMR groups. Option 2: One TA offset value is set for all CMR groups. In this case, the TA offset value is the same / common between all CMR groups. Option 3: In the inter-cell case, one TA offset value is set for each PCI and / or TAG.

[0187] Restrictions on DL reference timing may be set. The restriction may be at least one of the following options 1 to 3: Option 1: One DL reference timing is configured / supported per CMR group. In this case, the DL reference timing may be the same or different between multiple CMR groups. Option 2: One DL reference timing is configured / supported for all CMR groups. In this case, the DL reference timing is the same / common between all CMR groups. Option 3: In the inter-cell case, one DL reference timing is configured / supported per PCI and / or TAG.

[0188] Restrictions on DL Pathloss Reference Signals (PL-RS) may be imposed. The UE may not expect more than one SSB / CSI-RS from one CMR group to be configured as a PL-RS.

[0189] There may be restrictions on DL Radio Link Monitoring Reference Signals (RLM-RSs). The UE may not expect more than one SSB / CSI-RS from one CMR group to be configured as an RLM-RS.

[0190] There may be restrictions on DL Beam Failure Detection Reference Signals (BFD-RSs). A UE may not expect more than one SSB / CSI-RS from one CMR group to be configured as a BFD-RS.

[0191] [Embodiment 1.5] When L1-SINR is set as the report quantity, the setting of ZP-IMR may be at least one of the following options 1-1 to 1-3. Option 1-1: ZP-IMR and CMR are mapped one-to-one. Option 1-2: One commonly set ZP-IMR is set for all CMRs. Option 1-3: One commonly set ZP-IMR is set for each CMR group.

[0192] In the above Option 1-1, one ZP-IMR may be set for each CMR.

[0193] In the above options 1-3, one commonly set ZP-IMR is applied to multiple CMRs in one CMR group, and the same / different ZP-IMR may be applied to multiple CMRs in different CMR groups.

[0194] Whether L1-SINR measurement / reporting is supported and whether the above options 1-1 / 1-2 / 1-3 are supported may depend on UE capabilities and / or configuration by the network.

[0195] When L1-SINR is set as the report quantity, the setting of NZP-IMR may be at least one of the following options 2-1 to 2-3. Option 2-1: NZP-IMR and CMR, or NZP-IMR and ZP-IMR are mapped one-to-one. Option 2-2: One commonly set NZP-IMR is set for all CMRs, or between NZP-IMR and ZP-IMR. Option 2-3: One commonly set NZP-IMR is set for each CMR group.

[0196] In the above Option 2-1, one NZP-IMR may be set for each CMR.

[0197] In the above Option 2-3, one commonly set NZP-IMR is applied to multiple CMRs in one CMR group, and the same / different NZP-IMR may be applied to multiple CMRs in different CMR groups.

[0198] Whether the configuration of NZP-IMR for L1-SINR is supported and whether the above options 2-1 / 2-2 / 2-3 are supported may depend on UE capability and / or configuration by the network.

[0199] [Embodiment 1.6] The UE may report at least one of a beam index (CRI / SSBRI) indication, a CMR group ID indication, and a value of L1-RSRP / L1-SINR for each beam to the base station in one CSI report. The CSI report may be created according to either Option 1-1 or 1-2 below.

[0200] [Option 1-1] All configured CMRs across all CMR groups may be indexed. ２A beam index corresponding to one CMR may be indicated by using a (MAX_allgroup) bit. In this disclosure, MAX_allgroup may refer to the total number of CMRs across the CMR group. In this disclosure, ceil(A) may refer to the ceiling function of A. In this disclosure, log ２ (B), ceil(log ２ (B)) etc. may be read interchangeably. ２ (MAX_allgroup)) means the number of bits of one beam index corresponding to one CMR when all CMRs across all CMR groups are indexed.

[0201] The UE may generate a CSI report using all beam indices corresponding to all selected / reported CMRs.

[0202] For example, the UE may use M×N×ceil(log ２ The (MAX_allgroup)) bit may be used to report M×N beam indices corresponding to the M×N CMRs.

[0203] For example, the UE may use K×ceil(log ２ (MAX_allgroup)) bits may be used to report K beam indices corresponding to K CMRs.

[0204] Figure 14A shows an example of a CSI report created according to Option 1-1. Figure 14A shows mapping of CSI fields included in one CSI report for CRI / RSRP or SSBRI / RSRP reporting. One CSI field may include one beam index (CRI / SSBRI) corresponding to one selected / reported CMR. The CSI report may include beam indices corresponding to CMRs #1 through #MxN or #K.

[0205] [Option 1-2] CMRs set for each CMR group may be indexed. ２ A beam index corresponding to one CMR in a CMR group may be indicated by using the ceil(log (MAX_pergroup)) bit. In this disclosure, MAX_pergroup may refer to the number of CMRs in a CMR group. ２ One CMR Group ID may be indicated by using the (Total Number of CMR Groups) bit. In this case, the CSI report may be generated according to option 1-2A or option 1-2B below.

[0206] The UE may create a CSI report for each CMR group using the beam index corresponding to the CMR to be selected / reported and the CMR group ID to which the CMR belongs (option 1-2A).

[0207] FIG. 14B shows an example of a CSI report created according to Option 1-2A. FIG. 14B shows the mapping of CSI fields included in one CSI report for CRI / RSRP or SSBRI / RSRP reporting. One CSI field may include one CMR group ID or one beam index (CRI / SSBRI) corresponding to one CMR. A CSI report may include one or more CSI field sets (e.g., CSI field sets #A1, #A2). One CSI field set may include one CMR group ID and beam indexes corresponding to one or more CMRs in the CMR group. One CSI field set may correspond to one selected / reported CMR group. The number of CSI field sets may be the same as the number of selected / reported CMR groups.

[0208] The UE may create a CSI report for each beam index and each CMR group using the beam index corresponding to the CMR being selected / reported and the ID of the CMR group to which the CMR belongs (option 1-2B).

[0209] Figure 14C shows an example of a CSI report created according to Option 1-2B. Figure 14C shows the mapping of CSI fields included in one CSI report for CRI / RSRP or SSBRI / RSRP reporting. One CSI field may include a CMR group ID or a beam index (CRI / SSBRI) corresponding to one CMR. A CSI report may include one or more CSI field sets (e.g., CSI field sets #B1, #B2, ...). One CSI field set may include a CMR group ID and a beam index corresponding to one CMR within the CMR group. One CSI field set may correspond to one selected / reported CMR within one selected / reported CMR group, one selected / reported CMR, or one selected / reported CMR group. The number of CSI field sets may be the same as the number of CMRs selected / reported.

[0210] For quantization of the L1-RSRP / L1-SINR values ​​for each beam, the following Option 2-A or 2-B may be used. In this disclosure, terms such as strong, stronger, large, larger, high, higher, good, better, etc. may be interchangeable. In this disclosure, terms such as strongest, largest, highest, best, etc. may be interchangeable.

[0211] [Option 2-A] The strongest value of all measurements (L1-RSRP / L1-SINR values) for all CMR groups may be quantized with 7 bits (or other bit size with high quantization resolution), and the remaining values ​​may be differentially quantized with 4 bits (or other bit size with low quantization resolution).

[0212] In the CSI report, the beam with the largest L1-RSRP / L1-SINR value among all CMRs may be mapped / placed before other beams.

[0213] [Option 2-B] The strongest value among all measurements (L1-RSRP / L1-SINR values) for one CMR group may be quantized with 7 bits (or other bit size with high quantization resolution), and the remaining values ​​in the CMR group may be differentially quantized with 4 bits (or other bit size with low quantization resolution).

[0214] In the CSI report, the beam with the largest L1-RSRP / L1-SINR value among the CMRs for each CMR group may be mapped / placed before other beams included in the same CMR group.

[0215] In the CSI report, the L1-RSRP / L1-SINR values ​​may be mapped / placed after the corresponding beam index, in which case any of the following options 3-A to 3-C may be used.

[0216] [Option 3-A] As shown in FIG. 15A, the L1-RSRP / L1-SINR values ​​for each beam may be mapped / located immediately after the corresponding beam index.

[0217] [Option 3-B] As shown in FIG. 15B, the L1-RSRP / L1-SINR values ​​for the beams per CMR group may be mapped / arranged after the beam index per CMR group.

[0218] [Option 3-C] As shown in FIG. 15C, the L1-RSRP / L1-SINR values ​​for all beams may be mapped / placed after all beam indices.

[0219] According to the above-described embodiment 1.6, the size and mapping of the CSI report can be appropriately determined.

[0220] [Variations] At least one of the number of CMR groups (M), the number of CMRs per CMR group (N), and the number of CMRs across CMR groups (K) may not be configured by the network. In other words, the UE may determine at least one of M, N, and K.

[0221] At least one of the maximum number of CMR groups (M'), the maximum number of CMRs per CMR group (N'), and the maximum number of CMRs across CMR groups (K') may be configured by the network. The UE may determine at least one of M satisfying M≦M', N satisfying N≦N', and K satisfying K≦K'.

[0222] The size of the CSI report may be variable. In order for the network and the UE to have a common understanding of the content of the CSI report, the following extensions may be made: A two-part CSI report is supported, where the first part (CSI part 1) has a fixed size and the second part (CSI part 2) indicates the interpretation and size.

[0223] For example, in the first part, the UE ２ (MAX_allgroup)) bits or ceil(log ２ The UE may report the number of beams to be reported using (K') bits. The size and content of the second part may be determined by the first part. In the second part, the UE may report at least one of a beam index (CRI / SSBRI) indication, a CMR group ID indication, and a value of L1-RSRP / L1-SINR for each beam according to embodiment 1.6.

[0224] For example, in the first part, the UE ２ (Number of CMR groups)) bits or ceil(log ２ The UE may report the number of CMR groups using ceil(log(M')) bits in the first part. ２ (Number of CMRs per CMR group)) bits or ceil(log ２The UE may report the number of CMRs for each CMR group using (N') bits. The size and content of the second part may be determined by the first part. In the second part, the UE may report at least one of a beam index (CRI / SSBRI) indication, a CMR group ID indication, and a value of L1-RSRP / L1-SINR for each beam according to embodiment 1.6.

[0225] Based on the RRC configuration, the MAC CE may activate / indicate / update at least one of the following: One or more CMR groups for beam measurement One or more PCIs for one or more CMR groups for beam measurement Number of CMR groups to be selected / reported (M) / Number of CMRs to be selected / reported per CMR group (N) / Number of CMRs to be selected / reported across CMR groups (K) ZP-IMR / NZP-IMR configuration One or more restrictions as described in embodiment 1.4

[0226] The MAC CE may include a CMR group ID / TRP ID / subcell ID.

[0227] When event-based beam reporting / update is configured, multiple beams reported by the UE (or multiple beams associated with multiple TCI states) may be applied to multiple configured or defined corresponding DL / UL channels / RS associated with the corresponding CMR group.

[0228] To support this, a limit of one beam per CMR group may be set, or if multiple beams are reported per group, a specific rule may be used to select the beam to apply to the channel / RS for the corresponding CMR group. The rule may be, for example, to use the first beam among the multiple beams, or to use a beam with a lower / higher ID.

[0229] For each TRP / CMR group, the RLM-RS / BFD-RS / PL-RS may be updated as the reporting beam for the corresponding CMR group.

[0230] According to the first embodiment described above, non-group-based beam reporting can be appropriately controlled.

[0231] Second Embodiment The second embodiment relates to group-based beam reporting.

[0232] [Embodiment 2.1] When multiple groups of multiple CMRs (SSB / CSI-RS) (e.g., X CMR groups) are configured, group-based beam reporting may be supported / configured. Each CMR group may include the same number of CMRs (e.g., Y CMRs), or each CMR group may include a different number of CMRs. The UE may select / report P joint report groups.

[0233] Each joint reporting group may include multiple CMR groups and may include Q CMRs (Q satisfies Q≦X) across the multiple CMR groups.

[0234] In each joint reporting group, there may be a maximum of one CMR selected / reported from one CMR group.

[0235] The UE may simultaneously receive CMRs in one joint reporting group, and the network may simultaneously transmit CMRs in different CMR groups (the network may simultaneously transmit RSs in multiple CMRs, each of which is included in multiple CMR groups).

[0236] The X / Y / P / Q may be set by RRC signaling or may be defined by specifications, and the maximum values ​​of the X / Y / P / Q may be defined by specifications or may be reported to the base station by UE capability information.

[0237] The UE may report capability information indicating that it supports group-based beam reporting for multiple CMR groups.

[0238] In the configuration of a CMR, the CMR group ID may be explicitly set, in which case the CMR group ID may be associated with the ID of the corresponding TRP / subcell.

[0239] In the configuration of a CMR, the CMR group ID may not be explicitly set, in which case the CMR group may be identified by the ID of the corresponding TRP / subcell.

[0240] The following options 1 and 2 may be set as restrictions on the CMR settings: Option 1: One CMR may be selected / reported in only one joint reporting group. In other words, the same CMR may not be selected / reported between different joint reporting groups. Option 2: The same CMR may be selected / reported between different joint reporting groups.

[0241] Fig. 16 is a diagram showing an example of CMR groups and CMRs. In Fig. 16, five CMR groups (CMR groups 1-5) are set, and the same number of CMRs (four in this example) are set for each CMR group.

[0242] FIG. 17 shows an example of CMR groups and CMRs reported by a UE in Option 1. In FIG. 17, the UE reports two joint report groups. Each joint report group includes three CMR groups selected from the five CMR groups (CMR groups 1-5) in FIG. 16. The UE selects and reports one CMR per CMR group from the four CMRs configured in each of the three CMR groups in the first joint report group (e.g., joint report group #1). The UE also selects and reports one CMR per CMR group from the four CMRs configured in each of the three CMR groups in the second joint report group (e.g., joint report group #2). In FIG. 17, the CMRs in the first joint report group (e.g., joint report group #1) are different from the CMRs in the second joint report group (e.g., joint report group #2).

[0243] Figure 18 shows an example of CMR groups and CMRs reported by a UE in Option 2. In Figure 18, the UE reports two joint report groups. Each joint report group includes three CMR groups selected from the five CMR groups (CMR groups 1-5) in Figure 16. The UE selects and reports one CMR per CMR group from the four CMRs configured in each of the three CMR groups in the first joint report group (e.g., joint report group #1). The UE also selects and reports one CMR per CMR group from the four CMRs configured in each of the three CMR groups in the second joint report group (e.g., joint report group #2). In FIG. 18, a first joint reporting group (e.g., joint reporting group #1) and a second joint reporting group (e.g., joint reporting group #2) include common CMRs (e.g., CMRs in CMR group #1).

[0244] According to the above-described embodiment 2.1, the UE can appropriately select / report the CMR.

[0245] [Embodiment 2.2] When multiple groups of multiple CMRs (SSB / CSI-RS) (e.g., X CMR groups) are configured, group-based beam reporting may be supported / configured. Each CMR group may contain the same number of CMRs (e.g., Y CMRs), or each CMR group may contain a different number of CMRs. １ First Joint Reporting Group, P ２ The Second Joint Reporting Group, P ３ A third joint reporting group, etc. may be selected / reported.

[0246] The number of CMRs to be selected / reported may be determined for each joint reporting group. For example, the number of CMRs in one first joint reporting group is Q １ and the number of CMRs in one second joint reporting group may be Q２ and the number of CMRs in one third joint reporting group is Q ３ may be.

[0247] In each joint reporting group, there may be a maximum of one CMR selected / reported from one CMR group.

[0248] The UE may receive CMRs in one joint reporting group simultaneously, and the network may transmit CMRs in different CMR groups simultaneously.

[0249] Above X / Y / P １ / Q １ / P ２ / Q ２ / P ３ / Q ３ The above X / Y / P may be set by RRC signaling or may be defined by specifications. １ / Q １ / P ２ / Q ２ / P ３ / Q ３ The maximum values ​​such as these may be defined by specifications or may be reported to the base station by the UE capability information.

[0250] As a restriction on the setting of a CMR, the following Option 1 or Option 2 may be provided: Option 1: One CMR may be selected / reported only in one joint reporting group (in other words, the same CMR may not be selected / reported between different joint reporting groups). Option 2: The same CMR may be selected / reported between different joint reporting groups.

[0251] 19 is a diagram showing an example of a CMR group and a CMR reported by a UE. １ = 1, P ２ = 1, P ３ = 1. That is, in FIG. 19, the UE reports one first joint report group, one second joint report group, and one third joint report group. Also, in FIG. 19, Q １ = 1, Q２ = 2, Q ３ = 3. That is, the UE selects / reports one CMR from the first joint reporting group (e.g., joint reporting group #1), selects / reports two CMRs from the second joint reporting group (e.g., joint reporting group #2), and selects / reports three CMRs from the third joint reporting group (e.g., joint reporting group #3). As shown in Figure 19, the CMRs in each joint reporting group may be different (e.g., joint reporting groups #1 and #2) or may contain common CMRs (e.g., joint reporting groups #1 and #3).

[0252] According to the above-described embodiment 2.2, the UE can appropriately select / report the CMR.

[0253] [Embodiment 2.3] As in embodiment 1.4, restrictions may be set for CMRs set for each CMR group and / or for CMRs in different CMR groups.

[0254] When L1-SINR is set as the report quantity, the setting of ZP-IMR may be the same as in embodiment 1.5.

[0255] When L1-SINR is set as the report quantity, the setting of NZP-IMR may be the same as in embodiment 1.5.

[0256] [Embodiment 2.4] The UE may report at least one of a beam index (CRI / SSBRI) indication, a CMR group ID indication, and a value of L1-RSRP / L1-SINR for each beam to the base station in one CSI report.

[0257] All CMRs across all CMR groups may be indexed. ２ One beam index corresponding to one CMR may be indicated by using the ceil(log (MAX_allgroup)) bit. ２(MAX_allgroup)) means the number of bits of one beam index corresponding to one CMR when all CMRs across all CMR groups are indexed.

[0258] In embodiment 2.1, for each joint reporting group, ２ The ID of the joint reporting group with the (P)) bit may or may not be explicitly reported.

[0259] In embodiment 2.2, for each joint reporting group, ２ (P １ +P ２ +P ３ The ID of the joint reporting group with the +...)) bit may or may not be explicitly reported.

[0260] If the ID of the joint reporting group is not reported, rules / constraints / priorities regarding the order of beams per joint reporting group may be defined to ensure common recognition between the UE and the base station of which beams belong to the same joint reporting group.

[0261] The UE may generate a CSI report using all beam indices corresponding to all selected / reported CMRs.

[0262] 20A and 20B are diagrams illustrating an example of a CSI report. Figure 20A illustrates mapping of CSI fields included in one CSI report for CRI / RSRP or SSBRI / RSRP reporting. One CSI field may include a joint reporting group ID or a beam index (CRI / SSBRI) corresponding to one CMR. A CSI report may include one or more CSI field sets (e.g., CSI field sets #A1 and #A2). One CSI field set may include a joint reporting group ID and beam indexes corresponding to one or more CMRs in the joint reporting group. One CSI field set may correspond to one joint reporting group to be selected / reported. For example, CSI field sets #A1 and #A2 may correspond to joint reporting groups #1 and #2 in embodiment 2.1, respectively. The number of CSI field sets may be the same as the number of joint reporting groups to be selected / reported. As shown in FIG. 20A, when the number of CMRs per joint reporting group is the same (as in embodiment 2.1), the number of beam indices per CSI field set is the same.

[0263] Figure 20B shows the mapping of CSI fields included in one CSI report for CRI / RSRP or SSBRI / RSRP reporting. One CSI field may include a joint reporting group ID or a beam index (CRI / SSBRI) corresponding to one CMR. A CSI report may include one or more CSI field sets (e.g., CSI field sets #B1, #B2, and #B3). One CSI field set may include a joint reporting group ID and beam indices corresponding to one or more CMRs in the joint reporting group. One CSI field set may correspond to one selected / reported joint reporting group. For example, CSI field sets #B1, #B2, and #B3 may correspond to joint reporting groups #1, #2, and #3 in embodiment 2.2, respectively. The number of CSI field sets may be the same as the number of selected / reported joint reporting groups. As shown in FIG. 20B, when the number of CMRs per joint reporting group is different (as in embodiment 2.2), the number of beam indices per CSI field set is different.

[0264] One CSI field may indicate the L1-RSRP / L1-SINR value for the beam.

[0265] Similar to embodiment 1.6, the L1-RSRP / L1-SINR values ​​for each beam may be mapped / placed immediately after the corresponding beam index.

[0266] Similar to embodiment 1.6, the L1-RSRP / L1-SINR values ​​for the beams per joint report group may be mapped / arranged after the beam index per joint report group.

[0267] Similar to embodiment 1.6, the L1-RSRP / L1-SINR values ​​for all beams may be mapped / placed after all beam indices.

[0268] For quantization of the L1-RSRP / L1-SINR values ​​for each beam, the following option A or B may be used.

[0269] [Option A] The strongest value of all measurements (L1-RSRP / L1-SINR values) for all beams may be quantized with 7 bits (or other bit size with high quantization resolution), and the remaining values ​​may be differentially quantized with 4 bits (or other bit size with low quantization resolution).

[0270] In the CSI report, the ID of the beam and joint reporting group with the largest L1-RSRP / L1-SINR value among all CMRs may be mapped / placed before other beams.

[0271] [Option B] The strongest value among all measurements (L1-RSRP / L1-SINR values) for one joint report group may be quantized with 7 bits (or other bit size with high quantization resolution), and the remaining values ​​in the joint report group may be differentially quantized with 4 bits (or other bit size with lower quantization resolution) for each joint report group.

[0272] In a CSI report, a beam having the largest L1-RSRP / L1-SINR value among the CMRs per joint reporting group may be mapped / placed before other beams included in the same joint reporting group.

[0273] The UE may support configuration of periodic / aperiodic / semi-persistent beam reporting in UCI or event-triggered beam reporting via MAC CE.

[0274] [Variation] Number of joint reporting groups (P, P １ , P ２ , P ３ , ...), and the number of CMRs per joint reporting group (Q, Q １ , Q ２ , Q ３ At least one of P, P...) may not be configured by the network. １ , P ２ , P ３ , ..., and Q, Q １ , Q ２ , Q ３ , . . . may be determined.

[0275] The maximum number of joint reporting groups (P', P １ ', P ２ ', P ３ ', ...), and the maximum number of CMRs per joint reporting group (Q', Q １ ', Q ２ ', Q ３ At least one of the following may be configured by the network: the number of joint reporting groups not greater than the configured maximum number of joint reporting groups, and the number of CMRs per joint reporting group not greater than the configured maximum number of CMRs per joint reporting group.

[0276] The size of the CSI report may be variable. In order for the network and the UE to have a common understanding of the content of the CSI report, the following extensions may be made: A two-part CSI report is supported, where the first part (CSI part 1) has a fixed size and the second part (CSI part 2) indicates the interpretation and size.

[0277] For example, in the first part, the UE ２ The UE may report the number of joint reporting groups using the ceil(log(P′)) bit in the first part. ２ (number of CMR groups)) bits or ceil(log ２(Q')) bits may be used to report the common number of CMRs for each joint reporting group.

[0278] For example, in the first part, the UE ２ The UE may report the number of joint reporting groups using P × ceil(log(P')) bits in the first part. ２ (number of CMR groups)) bits, or P x ceil(log ２ (Q')) bits may be used to report different numbers of CMRs per joint reporting group.

[0279] Based on the RRC configuration, the MAC CE may activate / indicate / update at least one of the following: One or more CMR groups for beam measurements One or more PCIs of one or more CMR groups for beam measurements Number of joint reporting groups (P, P １ , P ２ , P ３ , ...) / Selection per Joint Reporting Group / Number of CMRs Reported (Q, Q １ , Q ２ , Q ３ , ...) Setting ZP-IMR / NZP-IMR One or more of the restrictions described in embodiment 1.4

[0280] The MAC CE may include a CMR group ID / TRP ID / subcell ID.

[0281] When event-based beam reporting / update is configured, multiple beams reported by the UE (or multiple beams associated with multiple TCI states) may be applied to multiple configured or defined corresponding DL / UL channels / RS associated with the corresponding CMR group.

[0282] To support the above application, a limit of one joint report group may be set. Alternatively, when multiple joint report groups are reported, a specific rule may be used to select a beam to apply to the channel / RS for the corresponding CMR group. The rule may be, for example, to use the first joint report group among the multiple joint report groups, or to use the joint report group with the fewest / most beams.

[0283] For each TRP / CMR group, the RLM-RS / BFD-RS / PL-RS may be updated as the reporting beam for the corresponding CMR group.

[0284] According to the second embodiment described above, group-based beam reporting can be appropriately controlled.

[0285] <Supplementary Information> [Notification of Information to UE] In the above-described embodiments, any information may be notified to the UE (from a network (NW) (e.g., a base station (BS))) (in other words, reception of any information from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0286] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader, which is not defined in existing standards.

[0287] When the notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0288] Furthermore, notification of any information to the UE in the above embodiments may be performed periodically, semi-persistently, or aperiodically.

[0289] [Notification of Information from UE] In the above-described embodiments, notification of any information from the UE (to the NW) (in other words, transmission / report of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0290] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID, which is not defined in existing standards, in the MAC subheader.

[0291] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0292] Furthermore, any information in the above-described embodiments may be notified from the UE periodically, semi-persistently, or aperiodically.

[0293] [Application of Each Embodiment] At least one of the above-described embodiments may be applied when a specific condition is met. The specific condition may be defined in a standard or may be notified to a UE / BS using higher layer signaling / physical layer signaling.

[0294] At least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.

[0295] The specific UE capabilities may indicate at least one of the following: - Supporting specific processing / operations / control / information for at least one of the above embodiments; - Supporting cell-free / group-based beam reporting / non-group-based beam reporting; - Number of supported CMRs / CMR groups / joint reporting groups / CMRs per CMR group / CMRs per joint reporting group.

[0296] Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (e.g., one or a combination of a cell, a band, a band combination, a BWP, a component carrier, etc.), or may be a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or may be a capability for each subcarrier spacing (SubCarrier Spacing (SCS)), or may be a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0297] Furthermore, the specific UE capability may be a capability that is applied to all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (e.g., Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0298] Furthermore, at least one of the above-described embodiments may be applied when the UE configures / activates / triggers specific information related to the above-described embodiments (or performs the operations of the above-described embodiments) through higher layer signaling / physical layer signaling. For example, the specific information may be information indicating enabling cell-free / group-based beam reporting / non-group-based beam reporting, information on the number of CMRs / CMR groups / joint reporting groups / CMRs per CMR group / CMRs per joint reporting group, any RRC parameter for a specific release (e.g., Rel. 20 or later), etc.

[0299] If the UE does not support at least one of the specific UE capabilities or is not configured with the specific information, the UE may apply the behavior of, for example, Rel. 15 / 16 / 17 / 18.

[0300] (Supplementary Note 1) The following inventions are added to one embodiment of the present disclosure. [Supplementary Note 1-1] A terminal having: a receiving unit that receives a configuration regarding the number of channel measurement resources (CMRs) to report when group-based beam reporting is not configured; and a control unit that controls transmission of reports of multiple CMRs based on the configuration. [Supplementary Note 1-2] The terminal according to Supplementary Note 1-1, wherein the configuration includes M, which is the number of CMR groups for the report, and N, which is the number of CMRs for the report per CMR group, and the control unit selects N CMRs from each of the M CMR groups. [Supplementary Note 1-3] The terminal according to Supplementary Note 1-1 or Supplementary Note 1-2, wherein the configuration includes K, which is the number of CMRs for the report across multiple CMR groups, and the control unit selects a total of K CMRs from the multiple CMR groups. [Supplementary Note 1-4] The terminal according to any one of Supplementary Note 1-1 to Supplementary Note 1-3, wherein among the plurality of CMRs, CMRs included in the same CMR group are associated with the same physical cell ID (PCI).

[0301] (Supplementary Note 2) The following inventions are added to one embodiment of the present disclosure. [Supplementary Note 2-1] A terminal having: a receiving unit that receives a configuration for a channel state information (CSI) report when group-based beam reporting is not configured; and a control unit that controls, based on the configuration, transmission of the CSI report, the CSI report including a plurality of first fields indicating beam indices corresponding to CMRs indexed for each CMR group, and a plurality of second fields indicating IDs of the CMR groups. [Supplementary Note 2-2] The terminal according to Supplementary Note 2-1, wherein the CSI report includes one or more field sets, one field set corresponding to one CMR group and including one or more first fields and one second field. [Supplementary Note 2-3] The terminal according to Supplementary Note 2-1 or Supplementary Note 2-2, wherein the CSI report includes one or more field sets, one field set corresponding to one CMR in one CMR group and including one first field and one second field. [Supplementary Note 2-4] A terminal according to any one of Supplementary Note 2-1 to Supplementary Note 2-3, wherein one first field has a number of bits based on the number of CMRs included in one CMR group.

[0302] (Supplementary Note 3) The following inventions are added to one embodiment of the present disclosure. [Supplementary Note 3-1] A terminal having: a receiving unit that receives a configuration regarding the number of channel measurement resources (CMRs) to report when group-based beam reporting is configured; and a control unit that controls transmission of reports of multiple joint report groups, each including multiple CMRs, based on the configuration. [Supplementary Note 3-2] The terminal according to Supplementary Note 3-1, wherein the configuration includes P, which is the number of joint report groups, and Q, which is the number of CMRs per joint report group, and the control unit selects P joint report groups, each including Q CMRs. [Supplementary Note 3-3] The terminal according to Supplementary Note 3-1 or Supplementary Note 3-2, wherein the multiple CMRs included in the multiple joint report groups are different from each other. [Supplementary Note 3-4] The terminal according to any one of Supplementary Note 3-1 to Supplementary Note 3-3, wherein the plurality of joint report groups include a first joint report group and a second joint report group, and the number of CMRs included in the first joint report group is different from the number of CMRs included in the second joint report group.

[0303] (Supplementary Note 4) The following invention is added with respect to one embodiment of the present disclosure. [Supplementary Note 4-1] A terminal having: a receiving unit that receives a configuration for a channel state information (CSI) report when group-based beam reporting is configured; and a control unit that controls, based on the configuration, transmission of the CSI report, the CSI report including a plurality of first fields indicating beam indices corresponding to CMRs indexed across a plurality of channel measurement resource (CMR) groups, and a plurality of second fields indicating IDs of joint report groups including the plurality of CMRs. [Supplementary Note 4-2] The terminal according to Supplementary Note 4-1, wherein the CSI report includes one or more field sets, one field set corresponding to one joint report group and including one or more of the first fields and one second field, and different field sets including the same number of first fields. [Supplementary Note 4-3] The terminal according to Supplementary Note 4-1 or Supplementary Note 4-2, wherein the CSI report includes one or more field sets, one field set corresponding to one joint report group and including one or more of the first fields and one second field, and different field sets including different numbers of the first fields. [Supplementary Note 4-4] The terminal according to any of Supplementary Note 4-1 to Supplementary Note 4-3, wherein one first field has a number of bits based on the number of CMRs spanning multiple CMR groups.

[0304] (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.

[0305] 21 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may be simply referred to as 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).

[0306] 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.

[0307] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (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.

[0308] 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 SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0309] 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.

[0310] 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 (CCs) and dual connectivity (DC).

[0311] 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 higher than 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 correspond to a higher frequency band than FR2.

[0312] 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.

[0313] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between 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.

[0314] 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.

[0315] The core network 30 may include network functions (Network Functions (NF)) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). A single network node may provide multiple functions. Communication with an external network (e.g., the Internet) may also be performed via the DN.

[0316] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0317] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the wireless 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).

[0318] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0319] 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.

[0320] 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)), or the like may be used as an uplink channel.

[0321] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0322] 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.

[0323] 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 a UL grant, a UL DCI, etc. Note that the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

[0324] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources for searching 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 the CORESET associated with a certain search space based on the search space configuration.

[0325] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and the like in the present disclosure may be read interchangeably.

[0326] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation 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.

[0327] 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.

[0328] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0329] 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 an SS (PSS, SSS) and a PBCH (and a 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 a reference signal.

[0330] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like 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).

[0331] 22 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.

[0332] 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.

[0333] 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.

[0334] 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, control information, sequences, etc. to be transmitted as signals, 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.

[0335] 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.

[0336] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, the RF unit 122, and a measurement unit 123.

[0337] 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 relates, such as an array antenna.

[0338] 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.

[0339] The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0340] The transmitter / receiver unit 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.

[0341] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0342] The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

[0343] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.

[0344] 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.

[0345] 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.

[0346] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes that provide NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0347] 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.

[0348] The base station 10 may be at least one of the following base stations 1 to 4.

[0349] (Base Station 1) When group-based beam reporting is not configured, the transceiver unit 120 may transmit a setting regarding the number of channel measurement resources (CMRs) to be reported (e.g., RRC signaling to set M / N / K in the first embodiment). In this case, the control unit 110 may control the reception of reports of multiple CMRs selected based on the setting (e.g., M×N / K CMRs to be selected / reported in the first embodiment).

[0350] (Base station 2) When group-based beam reporting is not configured, the transceiver unit 120 may transmit a configuration for channel state information (CSI) reporting (e.g., RRC signaling for configuring M / N / K in the first embodiment). In this case, the control unit 110 may control reception of the CSI report, which is transmitted based on the configuration and includes a plurality of first fields indicating beam indices corresponding to CMRs indexed for each channel measurement resource (CMR) group (e.g., a plurality of CSI fields including beam indices (CRI / SSBRI) in FIGS. 14B and 14C ) and a plurality of second fields indicating IDs of CMR groups (e.g., a plurality of CSI fields including CMR group IDs in FIGS. 14B and 14C ).

[0351] (Base Station 3) When group-based beam reporting is configured, the transceiver unit 120 performs a setting regarding the number of channel measurement resources (CMRs) to be reported (for example, the P / P １ / P ２ / P ３ / Q / Q １ / Q ２ / Q ３ In this case, the controller 110 may control reception of reports of multiple joint report groups, each of which includes multiple CMRs, that are transmitted based on the settings.

[0352] (Base Station 4) When group-based beam reporting is configured, the transceiver unit 120 configures a channel state information (CSI) reporting setting (for example, P / P in the second embodiment). １ / P ２ / P ３ / Q / Q １ / Q ２ / Q ３In this case, the controller 110 may control reception of the CSI report, which is transmitted based on the setting, and includes a plurality of first fields indicating beam indices corresponding to CMRs indexed across a plurality of channel measurement resource (CMR) groups (e.g., a plurality of CSI fields including beam indices (CRI / SSBRI) in FIG. 20A and 20B ) and a plurality of second fields indicating IDs of joint report groups including a plurality of CMRs (e.g., a plurality of CSI fields including IDs of joint report groups in FIG. 20A and 20B ).

[0353] (User terminal) Fig. 23 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.

[0354] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, 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.

[0355] 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, etc., which are described based on common understanding in the technical field to which the present disclosure relates.

[0356] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may 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.

[0357] 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 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.

[0358] 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.

[0359] The transmitting / receiving antenna 230 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0360] 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.

[0361] The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0362] The transceiver unit 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.

[0363] The transmitter / receiver unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0364] 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 if not, it may not be necessary to perform DFT processing as the transmission processing.

[0365] The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

[0366] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

[0367] The transceiver unit 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, and acquire user data, etc.

[0368] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), 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.

[0369] The measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources. The channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on interference measurement resources. The interference measurement resources may be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc. CSI-IM may be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. In the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, NZP-IMR, ZP-IMR, etc. may be read as interchangeable terms.

[0370] The transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.

[0371] The user terminal 20 may be at least one of the following user terminals 1 to 4.

[0372] (User terminal 1) When group-based beam reporting is not configured, the transceiver unit 220 may receive a configuration regarding the number of channel measurement resources (CMRs) to report (e.g., RRC signaling that configures M / N / K in the first embodiment). In this case, the control unit 210 may control the transmission of reports of multiple CMRs (e.g., M×N / K CMRs to be selected / reported in the first embodiment) based on the configuration.

[0373] The setting may include M, which is the number of CMR groups for the report (e.g., the number (M) of CMR groups to be selected / reported in the first embodiment), and N, which is the number of CMRs for the report per CMR group (e.g., the number (N) of CMRs per CMR group to be selected / reported in the first embodiment). In this case, the control unit 210 may select N CMRs from each of the M CMR groups.

[0374] The setting may include K, which is the number of CMRs for the report across multiple CMR groups (e.g., the number (K) of CMRs to be selected / reported across all configured CMR groups in the first embodiment). In this case, the control unit 210 may select a total of K CMRs from the multiple CMR groups.

[0375] Among the multiple CMRs, CMRs included in the same CMR group may be associated with the same physical cell ID (PCI).

[0376] (User terminal 2) When group-based beam reporting is not configured, the transceiver unit 220 may receive configuration for channel state information (CSI) reporting (e.g., RRC signaling for configuring M / N / K in the first embodiment). In this case, the control unit 210 may control, based on the configuration, transmission of the CSI report including a plurality of first fields indicating beam indices corresponding to CMRs indexed for each channel measurement resource (CMR) group (e.g., a plurality of CSI fields including beam indices (CRI / SSBRI) in FIGS. 14B and 14C ) and a plurality of second fields indicating IDs of CMR groups (e.g., a plurality of CSI fields including CMR group IDs in FIGS. 14B and 14C ).

[0377] The CSI report may include one or more field sets (e.g., CSI field sets #A1 and #A2 in FIG. 14B). One field set corresponds to one CMR group and may include one or more first fields and one second field.

[0378] The CSI report may include one or more field sets (e.g., CSI field sets #B1, #B2, ... in FIG. 14C ), where one field set corresponds to one CMR in one CMR group and may include one first field and one second field.

[0379] One first field has a number of bits based on the number of CMRs included in one CMR group (for example, ceil(log ２ (MAX_pergroup))).

[0380] (User terminal 3) When group-based beam reporting is configured, the transceiver unit 220 performs a setting regarding the number of channel measurement resources (CMRs) to be reported (for example, the P / P １ / P ２ / P ３ / Q / Q １ / Q ２ / Q ３ In this case, the controller 210 may control the transmission of reports of multiple joint report groups, each including multiple CMRs, based on the configuration.

[0381] The setting may include P, which is the number of joint reporting groups (e.g., the number of joint reporting groups to be selected / reported (P) in embodiment 2.1), and Q, which is the number of CMRs per joint reporting group (e.g., the number of CMRs per joint reporting group to be selected / reported (Q) in embodiment 2.1). In this case, the control unit 210 may select P joint reporting groups, each including Q CMRs.

[0382] The CMRs included in the joint reporting groups may be different from each other.

[0383] The plurality of joint report groups may include a first joint report group and a second joint report group. The number of CMRs included in the first joint report group (e.g., the number of CMRs in the first joint report group (Q) in embodiment 2.2) may be １ )) is the number of CMRs included in the second joint reporting group (for example, the number of CMRs in the second joint reporting group (Q ２ )) may be different.

[0384] (User terminal 4) When group-based beam reporting is configured, the transceiver unit 220 configures a setting for channel state information (CSI) reporting (for example, P / P in the second embodiment). １ / P ２ / P ３ / Q / Q １ / Q ２ / Q ３ In this case, the controller 210 may receive, based on the setting, RRC signaling to configure the CSI report including a plurality of first fields indicating beam indices corresponding to CMRs indexed across a plurality of channel measurement resource (CMR) groups (e.g., a plurality of CSI fields including beam indices (CRI / SSBRI) in FIG. 20A and 20B ) and a plurality of second fields indicating IDs of joint report groups including a plurality of CMRs (e.g., a plurality of CSI fields including IDs of joint report groups in FIG. 20A and 20B ).

[0385] The CSI report may include one or more field sets (e.g., CSI field sets A1 and A2 in FIG. 20A). One field set corresponds to one joint reporting group and may include one or more of the first fields and one second field. Different field sets may include the same number of first fields.

[0386] The CSI report may include one or more field sets (e.g., CSI field sets #B1, #B2, and #B3 in FIG. 20B). One field set corresponds to one joint reporting group and may include one or more of the first fields and one second field. Different field sets may include different numbers of the first fields.

[0387] One first field may have a number of bits based on the number of CMRs spanning multiple CMR groups.

[0388] (Hardware Configuration) Note that 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 be realized by combining software with the single device or the multiple devices.

[0389] 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 described above, the implementation method of each is not particularly limited.

[0390] 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. 24 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.

[0391] In the present disclosure, the terms apparatus, circuit, device, section, unit, etc. may be used 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.

[0392] 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.

[0393] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified 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.

[0394] 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), transceiver unit 120 (220), etc. may be realized by the processor 1001.

[0395] 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 implemented by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be implemented in a similar manner.

[0396] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory, etc. The memory 1002 may store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0397] Storage 1003 is a computer-readable recording medium and may be composed of 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, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0398] 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.

[0399] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0400] 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.

[0401] 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 this hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0402] (Modifications) Note that terms described 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.

[0403] 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.

[0404] 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, Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by a transceiver in the frequency domain, and specific windowing performed by a transceiver in the time domain.

[0405] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology.

[0406] 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.

[0407] 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.

[0408] 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 the subframe and the 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.

[0409] 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. Note that the definition of TTI is not limited to this.

[0410] 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.

[0411] 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.

[0412] 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.

[0413] 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 greater than or equal to 1 ms.

[0414] 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 be determined based on numerology.

[0415] 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, each of which may be composed of one or more resource blocks.

[0416] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0417] 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.

[0418] A Bandwidth Part (BWP), which may also be referred to as a partial 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 BWP and numbered within the BWP.

[0419] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0420] 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."

[0421] 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.

[0422] 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.

[0423] 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.

[0424] 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.

[0425] 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.

[0426] 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.

[0427] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be 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.

[0428] Note that the physical layer signaling may be referred to as 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 referred to as 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).

[0429] 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).

[0430] 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).

[0431] 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.

[0432] 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), these wired and / or wireless technologies are included within the definition of transmission media.

[0433] 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).

[0434] In this 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," "layer," "number of layers," "rank," "resource," "resource set," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," "UE panel," "transmitting entity," "receiving entity," etc. may be used interchangeably.

[0435] In the present disclosure, the term "antenna port" may be interchangeably read as an antenna port for any signal / channel (e.g., a demodulation reference signal (DMRS) port). In the present disclosure, the term "resource" may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource, an SRS resource, etc.). The resource may include time / frequency / code / space / power resources. Furthermore, the spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0436] The group may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, and the like.

[0437] In addition, in the present disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable terms.

[0438] In addition, in the present disclosure, the terms TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0439] Furthermore, in the present disclosure, terms such as "QCL," "QCL assumption," "QCL relationship," "QCL type information," "QCL property / properties," "specific QCL type (e.g., Type A, Type D) property," and "specific QCL type (e.g., Type A, Type D)" may be interchangeable.

[0440] In the present disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interchangeable. In the present disclosure, terms such as sequence, list, set, group, cluster, and subset may be interchangeable.

[0441] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. The "spatial relationship information (TCI state)" may be interchangeable with "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. The TCI state and the TCI may be interchangeable. The spatial relationship information and the spatial relationship may be interchangeable.

[0442] In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0443] 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 partitioned 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 terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0444] In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information.

[0445] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0446] 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.

[0447] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

[0448] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0449] 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). Note that 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.

[0450] 25 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0451] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0452] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0453] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0454] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0455] The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0456] The driving assistance system unit 64 includes various devices for providing functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0457] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 to and from the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, which are provided in the vehicle 40.

[0458] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Furthermore, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (or may function as at least one of the base station 10 and the user terminal 20).

[0459] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0460] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0461] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0462] 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 an uplink channel and a downlink channel may be read as a sidelink channel.

[0463] 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.

[0464] 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), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0465] 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 particular order presented.

[0466] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802. The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0467] 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."

[0468] 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.

[0469] 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.

[0470] 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.

[0471] Furthermore, "determination" may be considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "determining" some kind of action. In the present disclosure, "determination" may be read interchangeably with the above-mentioned actions.

[0472] Furthermore, in this disclosure, "determine / determining" may be interchangeably read as "assume / assuming," "expect / expecting," "consider / considering," etc. Furthermore, in this disclosure, "does not expect to do..." may be interchangeably read as "assumes not to do...."

[0473] In the present disclosure, "expect" may be interchangeably read as "be expected." For example, "expect(s) ..." ("..." may be expressed, for example, as a that clause, a to-infinitive, etc.) may be interchangeably read as "be expected ...." "does not expect ..." may be interchangeably read as "be not expected ...." Furthermore, "An apparatus A is not expected ..." may be interchangeably read as "an apparatus B other than apparatus A does not expect ... from apparatus A" (e.g., if apparatus A is a UE, apparatus B may be a base station).

[0474] 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.

[0475] 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."

[0476] 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.

[0477] 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."

[0478] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0479] 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.

[0480] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with "i-th" (i is an arbitrary integer) attached (for example, "highest" may be interchangeable with "i-th highest").

[0481] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0482] In the present disclosure, terms such as "when A, B," "if A, (then) B," "B upon A," "B in response to A," "B based on A," "B during / while A," "B before A," "B at (the same time as) / on A," "B after A," "B since A," and "B until A" may be interchangeable. Note that A, B, and the like herein may be replaced with appropriate expressions such as nouns, gerunds, and regular sentences, depending on the context. Note that the time difference between A and B may be approximately zero (immediately after or immediately before). A time offset may also be applied to the time at which A occurs. For example, "A" may be interchangeable with "before / after a time offset at which A occurs." The time offset (eg, one or more symbols / slots) may be predefined or may be specified by the UE based on signaled information.

[0483] In the present disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc. may be read interchangeably.

[0484] 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 description of the present disclosure is for illustrative purposes only and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. When a group-based beam report is set, a receiving unit that receives settings for channel state information (CSI) reporting, and based on the settings, a plurality of first fields indicating beam indexes corresponding to CM Rs indexed across a plurality of channel measurement resource (CMR) groups, and a control unit that controls transmission of the CSI report including a plurality of second fields indicating IDs of joint report groups including the plurality of CM Rs. A terminal having the above.

2. The CSI report includes one or more field sets, one field set corresponds to one joint report group, and includes one or more of the first fields and one second field, and different field sets include the same number of first fields. The terminal according to claim 1.

3. The CSI report includes one or more field sets, one field set corresponds to one joint report group, and includes one or more of the first fields and one second field, and different field sets include different numbers of the first fields. The terminal according to claim 1.

4. One first field has a number of bits based on the number of CM Rs across a plurality of CMR groups. The terminal according to claim 1.

5. When a group-based beam report is set, a step of receiving settings for channel state information (CSI) reporting, and based on the settings, a plurality of first fields indicating beam indexes corresponding to CM Rs indexed across a plurality of channel measurement resource (CMR) groups, and a step of controlling transmission of the CSI report including a plurality of second fields indicating IDs of joint report groups including the plurality of CM Rs. A wireless communication method for a terminal having the above.

6. When a group-based beam report is set, a transmitting unit that transmits settings for channel state information (CSI) reporting, and a control unit that controls reception of the CSI report including a plurality of first fields indicating beam indexes corresponding to CM Rs indexed across a plurality of channel measurement resource (CMR) groups and a plurality of second fields indicating IDs of joint report groups including the plurality of CM Rs, which are transmitted based on the settings. A base station having the above.

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