Terminal, wireless communication method, and base station

Abstract

A terminal according to one aspect of the present disclosure has a reception unit and a control unit. The reception unit receives: a Medium Access Control Control Element (MAC CE) that indicates a plurality of Transmission Configuration Indication (TCI) states from one or more transmission / reception points; and specific information that indicates the one or more transmission / reception points. The control unit determines one or more TCI states to be used for transmission / reception on the basis of the MAC CE and the specific information. The one aspect of the present disclosure makes it possible to perform appropriate communication using a unit that is different from an existing cell.

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., NR, 6G, etc.), it is being considered that terminals (user terminals, User Equipment (UE)) will perform cell-free communication, in which they communicate using units different from existing cells.

[0006] However, specific consideration of cell-free communication has not been sufficiently carried out, and if this consideration is insufficient, there is a risk that improvements in communication quality / communication throughput will be hindered.

[0007] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that perform appropriate communication using a unit different from that of existing cells.

[0008] A terminal according to one aspect of the present disclosure is characterized by having: a receiving unit that receives a Medium Access Control Control Element (MAC CE) that indicates a plurality of Transmission Configuration Indication (TCI) states from one or more transmission / reception points and specific information that indicates the one or more transmission / reception points; and a control unit that determines one or more TCI states to be used for transmission / reception based on the MAC CE and the specific information.

[0009] According to one aspect of the present disclosure, appropriate communication can be performed using units different from existing cells.

[0010] Figures 1A and 1B are diagrams illustrating an example of RRC information elements related to CSI reporting configuration and CSI resource configuration. Figures 2A and 2B are diagrams illustrating an example of RRC information elements related to NZP CSI-RS resource sets and CSI-SSB resource sets. Figure 3 is a diagram illustrating an example of RRC information elements related to TCI status. Figure 4 is a diagram illustrating an example of the RRC information element "CSI-ReportConfig" in Rel. 16. Figure 5 is a diagram illustrating an example of a CSI report in Rel. 15 NR. Figure 6 is a diagram illustrating an example of a CSI report when performing enhanced group-based beam reporting. Figures 7A and 7B are diagrams illustrating an overview of MIMO. Figures 8A and 8B are diagrams illustrating an overview of a cellular system. Figures 9A to 9C are diagrams illustrating an example of an overview of Assumption 1 of a cell-free configuration. Figure 10 is a diagram illustrating an example of a TCI status list according to Option 1 of embodiment 0.1. Figure 11 is a diagram illustrating an example of a TCI status list according to Option 2-1 of embodiment 0.1. FIG. 12 shows an example of a TCI status list according to Option 2-2 of embodiment 0.1. FIG. 13 shows an example of mapping between active TCI statuses and code points in the TCI field according to Option 1 of embodiment 0.2. FIG. 14 shows an example of mapping between active TCI statuses and code points in the TCI field according to Option 2 of embodiment 0.2. FIG. 15 shows an example of mapping between active TCI statuses and code points in the TCI field according to Option 3 of embodiment 0.2. FIG. 16 shows an example of mapping between active TCI statuses and code points in the TCI field according to Option 4 of embodiment 0.2. FIG. 17 shows an example of mapping between active TCI statuses and code points in the TCI field according to Option 1 of embodiment 0.3. FIG. 18 shows an example of mapping between active TCI statuses and code points in the TCI field according to Option 2 of embodiment 0.3. FIG. 19 shows an example of mapping between active TCI statuses and code points in the TCI field according to Option 3 of embodiment 0.3. FIG. 20 shows an example of mapping between active TCI states and code points of TCI fields according to option 4 of embodiment 0.3.FIG. 21 shows an example of updating the active TCI state in embodiment 0.4. FIG. 22 shows another example of updating the active TCI state in embodiment 0.4. FIGS. 23A to 23C show an example of an indication of the TCI state used for transmission in embodiment 0.4. FIG. 24 shows an example of mapping between the active TCI state and the code point of the TCI field according to option 1 of embodiment 0.5. FIG. 25 shows an example of updating a subset of the active TCI state according to option 1 of embodiment 0.6. FIG. 26 shows an example of updating a subset of the active TCI state according to option 2 of embodiment 0.6. FIG. 27 shows an example of updating a subset of the active TCI state according to option 3 of embodiment 0.6. FIGS. 28A and 28B are diagrams showing an example of a CMR group and a CMR. FIGS. 29A and 29B are diagrams showing an example of a CMR group and a CMR. FIGS. 30A and 30B are diagrams showing an example of a CMR group and a CMR.

[0073] Figures 31A and 31B are diagrams showing an example of a CMR group and a CMR. Figures 32A to 32C are diagrams showing an example of a CSI report. Figures 33A to 33C are diagrams showing an example of a CSI report. Figure 34 is a diagram showing an example of a CMR group and a CMR. Figure 35 is a diagram showing an example of a CMR group and a CMR. Figure 36 is a diagram showing an example of a CMR group and a CMR. Figure 37 is a diagram showing an example of a CMR group and a CMR. Figures 38A and 38B are diagrams showing an example of a CSI report. Figure 39 is a diagram showing an example of allocation of SRS resource sets / SRS resources according to Options 1-1 to 1-7 of embodiment 0.9. Figure 40 is a diagram showing an example of allocation of SRS resource sets / SRS resources according to Variation 1 of embodiment 0.9. Figure 41 is a diagram showing an example of allocation of SRS resource sets / SRS resources according to Variation 2 of embodiment 0.9. Figure 42 is a diagram showing an example of application of beams according to embodiment 0.12. Figure 43 shows an example of the correspondence between the TCI status indication field and the TRP / subcell in embodiment 1-1. Figure 44 shows an example of the correspondence between the TCI status indication field and the TRP / subcell according to method C1 in embodiment 1-2.FIG. 45 shows an example of association between the TCI status indication field and TRP / subcell according to method C2 of embodiment 1-2. FIGs. 46A and 46B show an example of a CSI report according to option 1 of embodiment 2. FIGs. 47A and 47B show an example of a CSI report according to option 2 of embodiment 2. FIG. 48 shows an example of configuration / instruction of an SRS resource set according to option 2 of embodiment 3. FIG. 49 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 50 is a diagram showing an example of a configuration of a base station according to an embodiment. FIG. 51 is a diagram showing an example of a configuration of a user terminal according to an embodiment. FIG. 52 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment. FIG. 53 is a diagram showing an example of a vehicle according to an embodiment.

[0011] (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).

[0012] 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.

[0013] 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.

[0014] 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 the following parameters is the same between these different signals / channels (i.e., the QCL is true for at least one of the following parameters): Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter).

[0015] 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).

[0016] A plurality of types of QCLs (QCL types) 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0021] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0022] Furthermore, the RS that has a QCL relationship with the channel may be, for example, at least one of 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)), and a QCL detection reference signal (also called a QRS).

[0023] 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.

[0024] 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.

[0025] In the present disclosure, the following may be read interchangeably: a port (antenna port) of a signal (resource, channel) is QCL'd with an RS (DL RS, QCL source RS); there is a QCL relationship between a port of a signal and an RS; a signal is QCL'd with an RS; a signal is QCL'd with an RS in a TCI state; a signal is QCL'd with an RS in a TCI state for a specific QCL type; a signal is associated with a TCI state; a TCI state is set / indicated for a signal; and a UE assumes that a port of a signal is QCL'd with an RS in a TCI state.

[0026] In the present disclosure, beam, SD beam, spatial domain index, precoding, precoder, quasi co-location (QCL) assumption, QCL relationship, transmission configuration indicator (TCI) state, spatial domain filter, spatial domain receive filter, spatial domain transmit filter, reference signal (RS), and spatial receive parameter may be interpreted as interchangeable.

[0027] (Unified / Common TCI Framework) The unified TCI framework allows multiple types of channels / RSs (UL / DL) to be controlled by a common framework. The unified TCI framework does not specify TCI states or spatial relationships for each channel as in Rel. 15. Instead, it may specify a common beam (common TCI state) and apply it to all UL and DL channels, or it may apply a common beam for UL to all UL channels and a common beam for DL ​​to all DL channels.

[0028] One common beam for both DL and UL, or one common beam for DL ​​and one common beam for UL (two common beams overall) are considered.

[0029] The UE may assume the same TCI state for UL and DL (joint TCI state, joint TCI pool, joint common TCI pool, joint TCI state set). The UE may assume different TCI states for UL and DL (separate TCI state, separate TCI pool, UL separate TCI pool and DL separate TCI pool, separate common TCI pool, UL common TCI pool and DL common TCI pool).

[0030] The default beams for UL and DL may be aligned via MAC CE based beam management (MAC CE level beam indication). The default TCI state of the PDSCH may be updated to align with the default UL beam (spatial relationship).

[0031] DCI-based beam management (DCI-level beam indication) may indicate a common beam / unified TCI state from the same TCI pool for both UL and DL (joint common TCI pool, joint TCI pool, set). X (>1) TCI states may be activated by the MAC CE. The UL / DL DCI may select one from the X active TCI states. The selected TCI state may apply to both UL and DL channels / RS.

[0032] The TCI pool (set) may be multiple TCI states configured by RRC parameters, or multiple TCI states (active TCI states, active TCI pools, sets) activated by MAC CE among the multiple TCI states configured by RRC parameters. Each TCI state may be a QCL type A / D RS. SSB, CSI-RS, or SRS may be configured as the QCL type A / D RS.

[0033] The number of TCI states corresponding to each of one or more TRPs may be specified. For example, the number N (≧1) of TCI states applied to UL channels / RSs (UL TCI states) and the number M (≧1) of TCI states applied to DL channels / RSs (DL TCI states) may be specified. At least one of N and M may be notified / configured / instructed to the UE via higher layer signaling / physical layer signaling.

[0034] In the present disclosure, when N=M=X (X is any integer), it may mean that X TCI states (joint TCI states) common to UL and DL (corresponding to X TRPs) are notified / configured / indicated to the UE. Also, when N=X (X is any integer) and M=Y (Y may be any integer, Y=X), it may mean that X UL TCI states (corresponding to X TRPs) and Y DL TCI states (i.e., separate TCI states) (corresponding to Y TRPs) are notified / configured / indicated to the UE.

[0035] For example, when N=M=1 is written, this may mean that a TCI state common to one UL and DL for a single TRP is notified / configured / indicated to the UE (joint TCI state for a single TRP).

[0036] Also, for example, when N=1 and M=1 are written, this may mean that one UL TCI state and one DL TCI state for a single TRP are separately notified / configured / instructed to the UE (separate TCI states for a single TRP).

[0037] Also, for example, when N=M=2 is written, this may mean that a TCI state common to multiple (two) ULs and DLs for multiple (two) TRPs is notified / configured / instructed to the UE (joint TCI state for multiple TRPs).

[0038] Also, for example, when N=2 and M=2, it may mean that multiple (two) UL TCI states and multiple (two) DL TCI states for multiple (two) TRPs are notified / configured / instructed to the UE (separate TCI states for multiple TRPs).

[0039] In the above example, the values ​​of N and M are 1 or 2, but the values ​​of N and M may be 3 or more, and N and M may be different.

[0040] Support for N = M = 1 is being considered for Rel. 17. For example, it may be supported to indicate one common beam (e.g., a common beam) using RRC / MAC CE / DCI, and the common beam may be applied to multiple DL / UL channels / reference signals. Other cases may also be supported in Rel. 18 and later.

[0041] In a joint DL / UL TCI state, an RRC parameter (information element) configures multiple TCI states for both DL and UL. The MAC CE may activate multiple TCI states among the configured TCI states. The DCI may indicate one of the activated TCI states.

[0042] The DCI may be a UL DCI (e.g., a DCI used to schedule a PUSCH) or a DL DCI (e.g., a DCI used to schedule a PDSCH). The indicated TCI state may apply to at least one (or all) of the UL / DL channels / RS. One DCI may indicate both a UL TCI and a DL TCI.

[0043] The indicated single TCI state ID may be one TCI state that applies to both UL and DL, or may be two TCI states that apply to UL and DL, respectively.

[0044] At least one of the multiple TCI states configured by the RRC parameters and the multiple TCI states activated by the MAC CE may be referred to as a TCI pool (common TCI pool, joint TCI pool, TCI state pool). The multiple TCI states activated by the MAC CE may be referred to as an active TCI pool (active common TCI pool).

[0045] In the present disclosure, higher layer parameters (RRC parameters) for setting multiple TCI states may be referred to as configuration information for setting multiple TCI states, or simply as "configuration information." Also, in the present disclosure, being instructed to set one of multiple TCI states using DCI may mean receiving indication information instructing one of the multiple TCI states included in DCI, or may simply mean receiving "instruction information."

[0046] In a separate TCI state (e.g., separate TCI (DL TCI state and UL TCI state)), RRC parameters configure multiple TCI states (joint common TCI pools) for both DL and UL. The MAC CE may activate multiple TCI states (active TCI pools) among the configured multiple TCI states. Separate active TCI pools for each of the UL and DL may be configured / activated.

[0047] The DL DCI or a new DCI format may select (indicate) one or more (e.g., one) TCI states. The selected TCI state may apply to one or more (or all) DL channels / RSs. The DL channels may be PDCCH / PDSCH / CSI-RS. The UE may determine the TCI state of each DL channel / RS using the TCI state behavior (TCI framework) of Rel. 16. The UL DCI or a new DCI format may select (indicate) one or more (e.g., one) TCI states. The selected TCI state may apply to one or more (or all) UL channels / RSs. The UL channels may be PUSCH / SRS / PUCCH. In this way, different DCIs may indicate UL TCI and DL DCI separately.

[0048] It is assumed that in Rel. 17 NR and later, the MAC CE / DCI supports beam activation / indication to a TCI state associated with a different physical cell identifier (PCI), and in Rel. 18 NR and later, the MAC CE / DCI supports indicating a serving cell change to a cell with a different PCI.

[0049] The application of the joint TCI state and the separate (DL / UL) TCI state may be switched. Whether the joint TCI state or the separate TCI state is applied may be configured by a higher layer parameter from the base station to the UE, or may be switched by a TCI field (TCI state ID) in the DCI.

[0050] The unified TCI framework supports the following modes 1 to 3: [Mode 1] MAC CE based TCI state indication [Mode 2] DCI based TCI state indication by DCI format 1_1 / 1_2 with DL assignment [Mode 3] DCI based TCI state indication by DCI format 1_1 / 1_2 without DL assignment

[0051] Note that the DCI in the above-mentioned mode 2 / mode 3 may be referred to as beam instruction DCI.

[0052] In the present disclosure, the terms "DCI-indicated TCI state," "indicated TCI state," "indicated TCI state," "unified TCI state," "TCI state applied to multiple types of channels / signals," "joint TCI state (for DL ​​and UL)," "DL TCI state," "UL TCI state," "Rel. 17 TCI state," "common TCI state," "single unified TCI state configured," and "single unified TCI state activated" may be read interchangeably.

[0053] In the present disclosure, the terms TCI state set by RRC parameters, configured TCI state, set TCI state, TCI state that does not conform to the unified TCI state, TCI state other than the unified TCI state, TCI state / spatial relationship set for a specific channel / signal, and individual TCI state may be read interchangeably.

[0054] The unified / common TCI state may refer to the indicated TCI state indicated using DCI / MAC CE / RRC (in Rel. 17).

[0055] The indicated TCI state may be shared with at least one of the UE-specific reception of PDSCH / PDCCH (updated using Rel. 17 DCI / MAC CE / RRC), PUSCH of dynamic grant (DCI) / configured grant, and multiple (e.g., all) dedicated PUCCH resources. The TCI state indicated by DCI / MAC CE / RRC may be referred to as the indicated TCI state.

[0056] If the indicated TCI state is supported (in Rel. 17), a TCI state other than the unified TCI state may refer to the TCI state configured using MAC CE / RRC (in Rel. 17) (configured TCI state).

[0057] The configured TCI state may not be shared with at least one of the UE-specific reception of PDSCH / PDCCH (updated using DCI / MAC CE / RRC in Rel. 17), PUSCH of dynamic grant (DCI) / configured grant, and multiple (e.g., all) dedicated PUCCH resources. The configured TCI state may be configured by RRC / MAC CE per CORESET / per resource / per resource set, and may not be updated even if the indicated TCI state is updated.

[0058] It is being considered that an indicated TCI state is applied to UE-specific channels / signals (RS), and that a UE is notified by higher layer signaling (RRC signaling) whether an indicated TCI state or a configured TCI state is applied to non-UE-specific channels / signals.

[0059] It is being considered that the RRC parameters for the configured TCI state (TCI state ID) will have the same configuration as the RRC parameters for the TCI state in Rel. 15 / 16. It is also being considered that the configured TCI state will be configured / instructed for each CORESET / resource / resource set using RRC / MAC CE. It is also being considered that the UE will determine the configuration / instruction based on specific parameters.

[0060] It is considered that the UE updates the indicated TCI state and the configured TCI state separately. For example, if the unified TCI state for the indicated TCI state is updated, the UE may not update the configured TCI state. It is also considered that the UE may determine whether to update the configured TCI state based on a specific parameter.

[0061] Furthermore, regarding the PDCCH / PDSCH, it is being considered to switch whether the indicated TCI state is applied or not applied (the configured TCI state is applied, or the TCI state configured separately from the indicated TCI state is applied) using higher layer signaling (RRC / MAC CE).

[0062] In addition, with regard to intra-cell beam indication (TCI state indication), it is being considered to support indication TCI state for UE-specific CORESET and PDSCH associated with that CORESET, and non-UE-specific CORESET and PDSCH associated with that CORESET.

[0063] In addition, for inter-cell beam indication (e.g., L1 / L2 inter-cell mobility), it is being considered that indication TCI status will be supported for a UE-specific CORESET and the PDSCH associated with that CORESET.

[0064] In Rel. 15, whether to indicate the TCI state for CORESET #0 was up to the implementation of the base station. In Rel. 15, for CORESET #0 for which a TCI state is indicated, the indicated TCI state is applied. For CORESET #0 for which a TCI state is not indicated, the SSB and QCL selected at the time of the latest (most recent) PRACH transmission are applied.

[0065] In the unified TCI state framework for Rel. 17 and later, the TCI state for CORESET #0 is being considered.

[0066] For example, in the unified TCI state framework of Rel. 17 and later, whether or not to apply the indicated Rel. 17 TCI state associated with the serving cell for the TCI state indication of CORESET #0 (of Rel. 17) is configured by RRC for each CORESET, and if not applied, the legacy MAC CE / RACH signaling mechanism may be used.

[0067] In addition, in Rel. 17, the CSI-RS related to the TCI state applied to CORESET #0 may be QCL'd with the SSB related to the serving cell PCI (physical cell ID) (similar to Rel. 15).

[0068] For CORESET #0, a CORESET with a common search space (CSS), and a CORESET with a CSS and a UE-specific search space (USS), whether to follow the indicated TCI state may be configured for each CORESET by an RRC parameter. If the indicated TCI state is not configured for that CORESET, the configured TCI state may be applied to that CORESET.

[0069] For non-UE-dedicated channels / RSs (except CORESET), whether to follow the indicated TCI state may be configured for each channel / resource / resource set by an RRC parameter. If the indicated TCI state is not configured for that channel / resource / resource set, the configured TCI state may be applied to that channel / resource / resource set.

[0070] Antenna Port QCL: Physical Layer Procedures for Data / Physical Downlink Shared Channel Association Procedures / UE Procedures for Receiving the Physical Uplink Shared Channel A UE can configure a list of up to M TCI-States in the higher layer parameter PDSCH-Config for decoding PDSCH according to the detected PDCCH with DCI for the UE and a given serving cell, where M depends on the UE capability maxNumberConfiguredTCIstatesPerCC. Each TCI-State includes parameters for configuring the QCL relationship between one or two downlink reference signals and the DM-RS port of the PDSCH, the DM-RS port of the PDCCH, or the CSI-RS port of the CSI-RS resource. The QCL relationship is configured by the higher layer parameter qcl-Type1 for the first DL RS and the higher layer parameter qcl-Type2 for the second DL RS (if configured). In the case of two DL RSs, the QCL type is not the same, regardless of whether the references are to the same DL RS or different DL RSs. The QCL type corresponding to each DL RS is given by the higher layer parameter qcl-Type in QCL-Info and may take one of the following values: ◇'typeA': {Doppler shift, Doppler spread, mean delay, delay spread} ◇'typeB': {Doppler shift, Doppler spread} ◇'typeC': {Doppler shift, mean delay} ◇'typeD': {Spatial Rx parameters}

[0071] In order to provide reference signals for PDSCH DMRS and PDCCH DMRS and CSI-RS within a CC, and further to provide a reference for determining the UL TX (transmission) spatial filter for dynamic grant and configuration grant-based PUSCH and PUCCH resources and SRS within a CC, if such a filter is available, the UE can configure a list of up to 128 DLorJointTCIState settings within PDSCH-Config.

[0072] If there is no TCI state (DL or joint TCI state (TCI-State) or UL TCI state (TCI-UL-State)) configured in the BWP in that CC, the UE may apply the TCI-State or TCI-UL-State configuration from the reference BWP of the reference CC. If the UE has dl-OrJointTCI-StateList or TCI-UL-State configured in any CC in the same band, it does not expect tci-StatesToAddModList (TCI state list for adding modifications), SpatialRelationInfo (spatial relation information), or PUCCH-SpatialRelationInfo (PUCCH spatial relation information) to be configured in that band, except for SpatialRelationInfoPos (spatial relation information for position). The UE can assume that if the UE has TCI-State configured in any CC in its CC list by simultaneousTCI-UpdateList1-r16 (simultaneous TCI update list 1), simultaneousTCI-UpdateList2-r16 (simultaneous TCI update list 2), simultaneousSpatial-UpdatedList1-r16 (simultaneous spatial update list 1), or simultaneousSpatial-UpdatedList2-r16 (simultaneous spatial update list 2), the UE does not have dl-OrJointTCI-StateList or TCI-UL-State configured in any CC in the same band in its CC list.

[0073] The UE receives an activation command used to map up to eight TCI states and / or up to eight TCI state pairs, with one TCI state for DL ​​channels / signals and / or one TCI state for UL channels / signals, to codepoints of the DCI field 'Transmission Configuration Indication' for one or a set of CCs / DL BWPs and, if applicable, one or a set of CCs / UL BWPs, as described in TCI States Activation / Deactivation for UE-specific PDSCH MAC CE or Unified TCI States Activation / Deactivation MAC CE in the MAC protocol specification.

[0074] For a set of CCs / DL BWPs and, if applicable, a set of CCs / UL BWPs, a set of TCI State IDs is activated, and if the applicable list of CCs is determined by the CCs indicated in the activation command, the same set of TCI State IDs applies to all DL and / or UL BWPs within the indicated CC.

[0075] If the activation command maps a TCI state (at least one of TCI-State and TCI-UL-State) to only one code point, and the indicated mapping for that single TCI code point is applied as described in the Requirements for Radio Resource Management (RRM) Support (MAC CE-based DL TCI State Switching Delay / MAC CE-based UL TCI State Switching Delay), the UE applies the indicated TCI state (at least one of TCI-State and TCI-UL-State) to one or a set of CCs / DL BWPs and, if applicable, to one or a set of CCs / UL BWPs.

[0076] If the bwp-id or cell for a QCL type A / D source RS in the QCL-Info of a TCI state is not configured, the UE shall assume that the QCL type A / D source RS is configured in the CC / DL BWP to which the TCI state applies.

[0077] If the TCI field is configured to be present in the DCI for CORESET (tci-PresentInDCI set to 'enabled' or tci-PresentDCI-1-2 set), a UE configured with a DL or joint TCI state list (dl-OrJointTCI-StateList) with an activated TCI state (TCI-State or TCI-UL-State) receives DCI format 1_1 / 1_2 that provides an indication of the TCI state (at least one of TCI-State and TCI-UL-State) for one CC or for all CCs in the same CC list configured by the simultaneous unified TCI update list (simultaneousU-TCI-UpdateList1-r17, simultaneousU-TCI-UpdateList2-r17, simultaneousU-TCI-UpdateList3-r17, simultaneousU-TCI-UpdateList4-r17). The DCI format 1_1 / 1_2 may be accompanied by a DL assignment if one is available, or may not be accompanied by a DL assignment.

[0078] If DCI format 1_1 / 1_2 does not carry a DL assignment, the UE can assume (verify): ◇The CS-RNTI is used to scramble the CRC for that DCI. ◇The values ​​of the following DCI fields (special fields) are set as follows: - The redundancy version (RV) field is all '1's. - The modulation and coding scheme (MCS) field is all '1's. - The new data indicator (NDI) field is 0. - The frequency domain resource assignment (FDRA) field is all '0's for FDRA type 0, or all '1's for FDRA type 1, or all '0's for Dynamic Switch (similar to PDCCH validation for release of DL semi-persistent scheduling (SPS) or UL grant type 2 scheduling).

[0079] If a UE receives a higher layer configuration of dl-OrJointTCI-StateList with a single TCI-State that can be used as the indication TCI state, the UE derives QCL assumptions from the configured TCI states for the PDSCH DM-RS, PDCCH DM-RS, and CSI-RS that apply to that indication TCI state.

[0080] If the UE receives higher layer configuration of dl-OrJointTCI-StateList with a single TCI-State or a single TCI-UL-State that can be used as the indicated TCI state, the UE determines the UL TX spatial filter, if applicable, from the configured TCI state for dynamic and configured grant-based PUSCH, PUCCH and SRS that apply to the indicated TCI state.

[0081] When a UE configured with a list of DL or joint TCI states (dl-OrJointTCI-StateList) attempts to transmit a PUCCH with a positive HARQ-ACK or a PUSCH with a positive HARQ-ACK corresponding to a DCI that transmits a TCI state indication and does not have a DL assignment, or corresponding to a PDSCH scheduled by a DCI that transmits a TCI state indication, and the indicated TCI state is different from a previously indicated indicated TCI state, the indicated TCI state (at least one of the indicated TCI-State and the indicated TCI-UL-State) will start to be applied from the first slot (beam application timing 1) that is at least beamAppTime symbols (beam application time (BAT)) after the last symbol of that PUCCH or that PUSCH. Both the first slot and the beamAppTime symbols are determined on the active BWP with the smallest SCS among the BWPs from the CC that applies the indicated TCI state (at least one of the indicated TCI-State and the indicated TCI-UL-State) that is active at the end of the PUCCH or the PUSCH that transmits the positive HARQ-ACK.

[0082] [DCI Format 1_1: Multiplexing and Channel Coding / Downlink Transport Channel and Control Information / Downlink Control Information / DCI Format] In Rel. 15 / 16, if a UE does not support active BWP changes via DCI, the UE ignores the BWP indicator field. A similar behavior is also considered for the relationship between support for the Rel. 17 TCI state and the interpretation of the TCI field. It is considered that if a UE is configured with the Rel. 17 TCI state, the TCI field will always be present in DCI format 1_1 / 1_2, and if the UE does not support TCI updates via DCI, the UE will ignore the TCI field.

[0083] In Rel. 15 / 16, whether or not a TCI field is present (TCI presence information in DCI, tci-PresentInDCI) is set for each CORESET.

[0084] The TCI field in DCI format 1_1 is 0-bit if the higher layer parameter tci-PresentInDCI is not enabled, and 3-bit otherwise. If the BWP indicator field indicates a BWP other than the active BWP, the UE shall follow the following behavior: [Action] If the higher layer parameter tci-PresentInDCI is not enabled for the CORESET used for the PDCCH carrying that DCI format 1_1, the UE shall assume that tci-PresentInDCI is not enabled for all CORESETs in the indicated BWP; otherwise, the UE shall assume that tci-PresentInDCI is enabled for all CORESETs in the indicated BWP.

[0085] The TCI field in DCI format 1_2 is 0 bit if the higher layer parameter tci-PresentInDCI-1-2 is not set, otherwise it is 1, 2 or 3 bits determined by the higher layer parameter tci-PresentInDCI-1-2. If the BWP indicator field indicates a BWP other than the active BWP, the UE shall follow the following actions. [Operation] If the higher layer parameter tci-PresentInDCI-1-2 is not set for the CORESET used for the PDCCH carrying that DCI format 1_2, the UE shall assume that tci-PresentInDCI is not enabled for all CORESETs in the indicated BWP; otherwise, the UE shall assume that tci-PresentInDCI-1-2 for all CORESETs in the indicated BWP is set with the same value as tci-PresentInDCI-1-2 set for the CORESET used for the PDCCH carrying that DCI format 1_2.

[0086] A TCI status ID indicating the joint DL / UL TCI status is associated with the value of the TCI field for indicating the joint DL / UL TCI status.

[0087] At least one TCI state ID, a TCI state ID indicating a TCI state for only DL and a TCI state ID indicating a TCI state for only UL, is associated with a value of the TCI field for separate DL / UL TCI state indication. For example, the TCI field values ​​000 to 001 are associated with only one TCI state ID for DL, the TCI field values ​​010 to 011 are associated with only one TCI state ID for UL, and the TCI field values ​​100 to 111 are associated with both one TCI state ID for DL ​​and one TCI state ID for UL.

[0088] [Channels / RSs to which the indicated TCI state applies] The indicated TCI state by the MAC CE / DCI may apply to the following channels / RSs:

[0089] [PDCCH] - If followUnifiedTCIState is configured for CORESET0, the indicated TCI state applies. Otherwise, the Rel. 15 specifications apply for that CORESET. That is, CORESET0 follows the TCI state activated by the MAC CE or is QCL'd with SSB. - For CORESETs with USS / CSS type 3 and index other than 0, the indicated TCI state always applies. - For CORESETs with index other than 0 and at least CSS type other than 3, if followUnifiedTCIState is configured, the indicated TCI state applies. Otherwise, the configured TCI state for that CORESET applies to that CORESET.

[0090] [PDSCH] - The indicated TCI state always applies to all UE-dedicated PDSCHs. - For non-UE-dedicated PDSCHs (PDSCHs scheduled by DCI in CSS), the indicated TCI state may apply if followUnifiedTCIState is set (for the CORESET of the PDCCH that schedules that PDSCH). Otherwise, the configured TCI state for that PDSCH applies to that PDSCH. If followUnifiedTCIState is not set for a PDSCH, whether a non-UE-dedicated PDSCH follows the indicated TCI state may depend on whether followUnifiedTCIState is set for the CORESET used to schedule that PDSCH.

[0091] [CSI-RS] For an A-CSI-RS for CSI acquisition or beam management, if followUnifiedTCIState is set (for CORESET of the PDCCH that triggers that A-CSI-RS), the indicated TCI state applies. For other CSI-RSs, the configured TCI state for that CSI-RS applies.

[0092] [PUCCH] - For all dedicated PUCCH resources, the indicated TCI state always applies.

[0093] [PUSCH] - For dynamic / configured grant PUSCH, the indication TCI state always applies.

[0094] [SRS] - When the SRS resource set for the A-SRS used for beam management and the A / SP / P-SRS used for codebook (CB) / non-codebook (NCB) / antenna switching is configured to follow the unified TCI state, the indicated TCI state is applied. For other SRSs, the configured TCI state in the SRS resource set is applied.

[0095] In the present disclosure, the terms "indicated TCI state," "unified TCI state," "TCI state applied to channels / signals configured to follow the unified TCI state," "TCI state applied to a UE-specific PDSCH and a CORESET / PDCCH associated with a USS," and "TCI state applied to a PUCCH and a PUSCH" may be interchangeable.

[0096] (Multi-TRP) In NR, one or more transmission / reception points (Transmission / Reception Points (TRP)) (multi-TRP) are considered to perform DL transmission to a UE using one or more panels (multi-panels). Also, it is considered that a UE performs UL transmission to one or more TRPs.

[0097] Note that multiple TRPs may correspond to the same cell identifier (ID), different cell IDs, different TCI state positions / orders, different CORESET pools, or different SRS resource sets. The cell ID may be a physical cell ID (e.g., PCI) or a virtual cell ID.

[0098] In the case where only one TRP (TRP1) of the multi-TRPs transmits to the UE (which may also be called single mode, single TRP, etc.), TRP1 transmits both control signals (PDCCH) and data signals (PDSCH) to the UE.

[0099] In this disclosure, single-TRP mode may refer to a mode in which multi-TRP (mode) is not set.

[0100] In a case where only one TRP of a multi-TRP transmits a control signal to a UE and the multi-TRP transmits a data signal (which may be called a single master mode), the UE receives each PDSCH transmitted from the multi-TRP based on one piece of Downlink Control Information (DCI).

[0101] In a case where each of the multi-TRPs transmits a separate control signal to the UE and the multi-TRPs transmit data signals (which may be called a multi-master mode), a first control signal (DCI) may be transmitted on TRP1 and a second control signal (DCI) may be transmitted on TRP2. The UE receives each PDSCH transmitted from the multi-TRP based on these DCIs.

[0102] When multiple PDSCHs from multiple TRPs (which may be referred to as multiple PDSCHs) are scheduled using one DCI, the DCI may be referred to as a single DCI (S-DCI, single PDCCH). Also, when multiple PDSCHs from multiple TRPs are scheduled using multiple DCIs, these multiple DCIs may be referred to as multiple DCIs (M-DCI, multiple PDCCHs).

[0103] Each TRP in a multi-TRP may transmit a different transport block (TB) / code word (CW) / different layer, or each TRP in a multi-TRP may transmit the same TB / CW / layer.

[0104] Non-Coherent Joint Transmission (NCJT) is being considered as one form of multi-TRP transmission. In NCJT, for example, TRP1 modulates and layer-maps a first codeword to transmit a first PDSCH using a first number of layers (e.g., two layers) with a first precoding. TRP2 modulates and layer-maps a second codeword to transmit a second PDSCH using a second number of layers (e.g., two layers) with a second precoding.

[0105] Note that multiple PDSCHs (multi-PDSCHs) that are non-coherent may be defined as partially or completely overlapping in time and / or frequency domains, i.e., a first PDSCH from a first TRP and a second PDSCH from a second TRP may overlap in time and / or frequency resources.

[0106] The first PDSCH and the second PDSCH may be assumed to be not quasi-co-located (QCL). Reception of multiple PDSCHs may be interpreted as simultaneous reception of PDSCHs that are not of a certain QCL type (e.g., QCL type D).

[0107] In URLLC for multi-TRP, it is considered that PDSCH (transport block (TB) or codeword (CW)) repetition across multi-TRP is supported. Repetition schemes (URLLC schemes, e.g., Schemes 1, 2a, 2b, 3, and 4) across multi-TRP in the frequency domain, layer (spatial) domain, or time domain are supported. In Scheme 1, multiple PDSCHs from multi-TRP are space division multiplexed (SDM). In Schemes 2a and 2b, PDSCHs from multi-TRP are frequency division multiplexed (FDM). In Scheme 2a, the redundancy version (RV) is the same for multi-TRP. In Scheme 2b, the RVs for multi-TRP may be the same or different. In schemes 3 and 4, multiple PDSCHs from multiple TRPs are time division multiplexed (TDM). In scheme 3, multiple PDSCHs from multiple TRPs are transmitted in one slot. In scheme 4, multiple PDSCHs from multiple TRPs are transmitted in different slots.

[0108] Such a multi-TRP scenario allows for more flexible transmission control using good quality channels.

[0109] NCJT using multiple TRPs / panels may use a high rank. To support ideal and non-ideal backhaul between multiple TRPs, both single DCI (single PDCCH) and multiple DCI (multiple PDCCH) may be supported. For both single DCI and multi-DCI, the maximum number of TRPs may be two.

[0110] For single PDCCH design (mainly for ideal backhaul), TCI extension is being considered. Each TCI codepoint in the DCI may correspond to one or two TCI states. The TCI field size may be the same as that of Rel. 15.

[0111] For PDCCH / CORESET specified in Rel. 15, one TCI state without CORESETPoolIndex (also referred to as TRP Info) is set to one CORESET.

[0112] Regarding the PDCCH / CORESET enhancements specified in Rel. 16, in multi-TRP based on multi-DCI, a CORESET pool index is configured for each CORESET.

[0113] (JT) Joint transmission (JT) may refer to simultaneous data transmission from multiple points (eg, TRPs) to a single UE.

[0114] Rel. 17 supports non-coherent joint transmission (NCJT) from two TRPs. The PDSCHs from the two TRPs may be independently precoded and independently decoded. The frequency resources may be non-overlapping, partially overlapping, or fully overlapping. When overlap occurs, the PDSCH from one TRP will interfere with the PDSCH from the other TRP.

[0115] Rel. 18 is considering supporting coherent joint transmission (CJT, mTRP CJT) using up to four TRPs. Data from the four TRPs may be coherently precoded and transmitted to the UE on the same time-frequency resource. For example, the same precoding matrix may be used to consider channels from the four TRPs. "Coherent" may mean that there is a fixed relationship between the phases of multiple received signals. Using four-TRP joint precoding, signal quality may be improved and there may be no interference between the four TRPs. Data may only be subject to interference outside the four TRPs.

[0116] (TCI indication in Rel. 18 NR) The TCI state configuration by RRC follows the following: Up to 128 TCI states can be configured for one serving cell. In coordination between multiple TRPs with different PCIs, multiple TCI states can be associated with SSBs of different PCIs, and up to 8 PCIs can be configured.

[0117] Activation of TCI states by the MAC CE follows: ◇ In single-TRP transmission, up to eight TCI states can be activated for one serving cell or one BWP of one serving cell. ◇ In switching between multiple TRPs with different PCIs, multiple activated TCI states can be associated with SSBs of different PCIs, and TCI states of up to eight PCIs can be activated. ◇ In multi-TRP joint transmission, up to eight TCI states can be activated per TRP / cell, and up to 16 TCI states can be activated in total. ◇ In joint transmission using multiple TRPs with different PCIs, multiple activated TCI states can be associated with SSBs of different PCIs, and TCI states of up to two PCIs can be activated.

[0118] The indication of the TCI state by the DCI is as follows: ◇Multiple code points in the TCI indication field in the DCI are mapped to multiple TCI states activated via the MAC CE. ◇In a single-TRP transmission, one code point in the TCI indication field in the DCI is mapped to one joint DL and UL TCI, or one DL TCI and one UL TCI, or one DL TCI, or one UL TCI. ◇In a single-DCI-based multi-TRP joint transmission, one code point in the TCI indication field in the DCI is mapped to one or two joint DL and UL TCIs, or one or two DL TCIs and one or two UL TCIs, or one or two DL TCIs, or one or two UL TCIs. In multi-DCI-based multi-TRP joint transmission, one code point of the TCI indication field in the DCI is mapped to one or two DL and UL joint TCIs, or one or two DL TCIs and one or two UL TCIs, or one or two DL TCIs, or one or two UL TCIs. Multiple DCIs indicate the TCI status for multiple TRPs.

[0119] (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).

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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).

[0125] 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.

[0126] 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.

[0127] 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.

[0128] As CSI feedback methods, periodic CSI (P-CSI) reporting, aperiodic CSI (A-CSI) reporting, semi-persistent CSI (SP-CSI) reporting, etc. are being considered.

[0129] The UE may be notified of the CSI measurement configuration information using higher layer signaling, physical layer signaling, or a combination thereof.

[0130] 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.

[0131] 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.

[0132] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0133] 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.

[0134] 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.

[0135] 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").

[0136] 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.

[0137] 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”).

[0138] 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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").

[0143] 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.

[0144] 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.

[0145] 2A and 2B are diagrams illustrating example RRC information elements for NZP CSI-RS resource sets and CSI-SSB resource sets.

[0146] 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”).

[0147] 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.

[0148] 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.

[0149] FIG. 3 is a diagram showing an example of RRC information elements related to the TCI state.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] (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.

[0155] 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.

[0156] 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.

[0157] 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.

[0158] 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).

[0159] 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.

[0160] 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.

[0161] 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.

[0162] 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.

[0163] 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.

[0164] 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'.

[0165] 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).

[0166] 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.

[0167] 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.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] 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.

[0172] 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.

[0173] Note that when groupBasedBeamReporting is enabled, the UE includes RSRP#1 and differential RSRP#2 in the same CSI report.

[0174] 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).

[0175] 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.

[0176] 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.

[0177] 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.

[0178] 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.

[0179] 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.

[0180] 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".

[0181] 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.

[0182] 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.

[0183] 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.

[0184] 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.

[0185] (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.

[0186] 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.

[0187] 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.

[0188] 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.

[0189] 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).

[0190] 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.

[0191] 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.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] 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.

[0196] (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.

[0197] <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.

[0198] 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).

[0199] 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.

[0200] (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.

[0201] 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.

[0202] By adopting distributed MIMO, it is possible to create a more favorable line-of-sight environment and improve MIMO performance.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] In other words, in cell-free, the coverage between multiple antennas / TRPs may overlap.

[0210] 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.

[0211] 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.

[0212] 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.

[0213] 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.

[0214] Self-regulation may be achieved, for example, by coordinating a set of antennas / TRPs controlled by a central control unit (e.g., CU).

[0215] 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.

[0216] 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.

[0217] 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.

[0218] 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.

[0219] 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.

[0220] 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.

[0221] Figure 9C is a diagram showing another example of the outline of the cell-free configuration assumption 2. In the example shown in Figure 9C, a PCI is assigned to each TRP included in the first cell (supercell / cell). In the example shown in Figure 9C, unlike the example in Figure 9B, the same PCI may correspond to multiple TRPs. Multiple TRPs can communicate cooperatively with one UE.

[0222] 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).

[0223] 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.

[0224] (Analysis) In cell-free, multiple TRPs / sub-cells are used. However, in a specific time period, a UE can only transmit and receive with some TRPs / sub-cells included in a first cell (super-cell / cell). For example, if a first cell (super-cell / cell) includes X TRPs / sub-cells, a UE can only transmit and receive with Y TRPs / sub-cells (where Y≦X) among the X TRPs / sub-cells.

[0225] In this way, when the number of TRPs / subcells for a UE to transmit and receive is limited, it is beneficial to indicate the TRPs / subcells. Specifically, it is beneficial to indicate the selection of one or more TRPs / subcells for a UE to transmit and receive in the following cases 1 to 3: Case 1: Activation of TCI state in MAC CE; Case 2: Non-group-based beam reporting / group-based beam reporting; Case 3: Configuration of SRS resource sets for specific applications (e.g., non-codebook / codebook).

[0226] In case 1, if the selection of one or more TRPs / subcells is indicated, it is considered that only the TCI status of the selected / indicated TRPs / subcells is indexed. In this case, the number of bits required to indicate one TCI status can be reduced compared to indexing the TCI status of all TRPs / subcells contained in the first cell (super-cell / cell). This allows for proper association of the TCI status configured by RRC signaling with the TRPs / subcells.

[0227] In Case 2, it is considered that the network instructs the UE to select one or more TRP / subcell / CMR groups (each CMR group corresponds to one TRP / subcell). Alternatively, it is considered that the UE reports the selection of one or more TRP / subcell / CMR groups. In this case, only one or more CMRs of the selected / instructed TRP / subcell / CMR group can be indexed, thereby reducing the number of bits required to report one CMR. Also, when the network instructs the UE to select one or more TRP / subcell / CMR groups, it is considered that the network determines / judges the selection of one or more TRP / subcell / CMR groups based on at least one of previous beam reports and other information (e.g., sensing-based information, information related to the UE's location).

[0228] In Case 3, increasing the number of SRS resource sets for specific purposes (e.g., non-codebook / codebook) in cell-free mode is considered. Also, methods for indicating SRS resource sets for specific purposes (e.g., non-codebook / codebook) for UL transmission are considered. For example, a method similar to the TDM repetition method for multi-TRP in Rel. 17 or the SRS resource set field in DCI in single DCI multi-panel transmission in Rel. 18 is considered.

[0229] Also, in cell-free mode, it is being considered to instruct the UE to select a group of CORESETs (CORESET group) to be monitored.

[0230] Also, it is being considered that in cell-free mode, a selection of TCI states applicable to multiple channels / reference signals is indicated.

[0231] However, the selection / indication / activation of such TRP / subcell / CMR group / SRS resource set / CORESET group / TCI state is not sufficiently considered, which may result in inappropriate communication between the TRP / second cell and the UE, thereby hindering improvement of communication throughput.

[0232] Therefore, the present inventors came up with a method for solving the above problem.

[0233] 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.

[0234] (Various Reinterpretations) In the present disclosure, a word enclosed in "( )" in a sentence may indicate an explanation of the word immediately preceding it (for example, an explanation of spelling), a paraphrase, a specific example, a supplementary explanation, etc. Furthermore, in the present disclosure, a word enclosed in "[ ]" in a sentence may be interpreted including the word in the meaning of the entire sentence, or may be interpreted excluding (ignoring) the word in the meaning of the entire sentence. Note that "( )" and "[ ]" may also be used for purposes / meanings other than those mentioned above.

[0235] 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."

[0236] 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.

[0237] 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.

[0238] 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.

[0239] 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.

[0240] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0241] In this disclosure, "having the capability of..." may be read interchangeably as "supporting / reporting the capability of...".

[0242] In the present disclosure, ceil(x), ceiling function, and ceiling function may be interchangeable. In the present disclosure, floor(x), floor function, and floor function may be interchangeable. In the present disclosure, sqrt(x) and square root may be interchangeable. In the present disclosure, x mod y, mod(x,y), mod function, and modulo operation may be interchangeable. In the present disclosure, Σ i=M M+N-1 f(i),Σ i=M M+N-1 f i , f(i) or f for i=M, M+1,..., M+N-1 i summation, f(M)+f(M+1)+...+f(M+N-1), f M +f M+1 +...+f M+N-1, may be read interchangeably. C(n,k) is the number of combinations of selecting k values ​​from n values ​​(combinatorial coefficient), binomial coefficients, n C k , C n k , may be read interchangeably.

[0243] In this disclosure, a b , a_b, and a with b added to the bottom right of a may be read interchangeably. c , a^c, and the notation of a with c added to the upper right of a may be read interchangeably. b c , a_b^c, and the notation in which b is added to the bottom right of a and c is added to the top right may be read interchangeably. ~ may be expressed by adding 〜 to the x, or may be referred to as x tilde. - may be represented by an x ​​with a - or may be called an x-bar.

[0244] In the present disclosure, the frequency range corresponding to FR1 may be 410-7125 MHz. In the present disclosure, FR2 may include FR2-1 and FR2-2, and the frequency range corresponding to FR2-1 may be 24250-52600 MHz, and the frequency range corresponding to FR2-1 may be 52600-71000 MHz.

[0245] In the present disclosure, the terms TCI state, DL and UL joint TCI state (joint DL / UL TCI state, a TCI state applied to both DL channels / signals and UL channels / signals), DL TCI state (separate DL TCI state, a TCI state applied only to DL channels / signals), and UL TCI state (separate UL TCI state, a TCI state applied only to UL channels / signals) may be read interchangeably.

[0246] In the present disclosure, the joint transmission of multiple TRPs / cells based on a single DCI (single DCI-based joint transmission, single DCI-based multi-TRP transmission) may be at least one of the following schemes: ◇Space division multiplex (SDM) scheme. This scheme may involve different ports / layers of DMRS for DL / UL transmission being associated with different TCI states, respectively. ◇Frequency division multiplex (FDM) scheme. This scheme may involve different frequency domain resources for DL / UL transmission being associated with different TCI states, respectively. ◇Coherent joint transmission (CJT) scheme. This scheme may involve different ports / layers of DMRS for DL / UL transmission being associated with different TCI states, respectively. ◇Single frequency network (SFN) scheme. This scheme may involve different ports / layers of DMRS for DL / UL transmission being associated with different TCI states, respectively. ◇Time division multiplex (TDM) scheme. This scheme may be that different time domain resources of DL / UL transmission are associated with different TCI states, respectively.

[0247] In the present disclosure, the multi-DCI based joint transmission of multiple TRPs / cells (multi-DCI based joint transmission, multi-DCI based multi-TRP transmission) scheme may be such that multiple DL / UL channels / signals are associated with different TCI states transmitted on multiple resources in overlapping time / frequency domains.

[0248] In the present disclosure, the terms TCI state, beam, spatial relationship, spatial domain Tx / Rx parameters, QCL, and reference signal may be interpreted interchangeably.

[0249] In the present disclosure, TRP, group of beams, group of TCI states, and set / group of RS resources may be read interchangeably.

[0250] In the present disclosure, the DCI indicating the TCI state may schedule the PDSCH / PUSCH.

[0251] In the present disclosure, coordinated transmission may be DL transmission or UL transmission using a designated TCI state among multiple activated TCIs. In the present disclosure, joint transmission may be DL transmission or UL transmission using multiple designated TCI states / TRPs / subcells. In the present disclosure, single TRP transmission / coordinated transmission / joint transmission may be applied to DL / UL.

[0252] 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, combination, etc. may be interchangeable.

[0253] 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.

[0254] In the present disclosure, CMR, CRI, SSBRI, beam, beam index, etc. may be read interchangeably.

[0255] In the present disclosure, a CMR group, a TRP, a cell, a sub-cell, an SRS resource set, a CORESET group, a TCI state, etc. may be interchangeable. In the present disclosure, a combination of multiple CMR groups, a TRP group, a cell group, a sub-cell group, a combination of multiple CORESET groups, a combination of multiple TCI states, etc. may be interchangeable.

[0256] In the present disclosure, a cell with a fixed physical range, an unchanging cell, a first cell, a super cell, a cell, a macro cell, a large cell, etc. may be read as interchangeable.

[0257] In the present disclosure, a cell whose physical range varies quasi-statically / dynamically based on conditions, a cell that changes, a second cell, a sub-cell, a cell, an area, a microcell, a small cell, a second cell within a first cell, etc. may be read interchangeably.

[0258] The first cell may include one or more second cells.

[0259] One second cell may be included in multiple first cells, and different first cells may share one second cell.

[0260] The different first cells may or may not overlap.

[0261] In the present disclosure, L1-RSRP, L1-SINR, L1-RSRQ, L3-RSRP, L3-SINR, L3-RSRQ, filtered / enhanced L1 measurements, etc. may be read interchangeably.

[0262] In the present disclosure, DCI, scheduling DCI, UL DCI, UL scheduling DCI, DL DCI, DL scheduling DCI, etc. may be read as interchangeable.

[0263] The following embodiments may be applied to other scenarios that use multiple TRPs that are greater than the multiple TRPs in existing specifications.

[0264] (Wireless Communication Method) <Embodiment 0.1> This embodiment relates to RRC configuration of TCI states (RRC IE, list).

[0265] For one supercell / cell, N Tci Up to N TCI states may be configured by the RRC. Tci may be the maximum number of TCI states in the RRC configuration.

[0266] N Tci may be greater than 128. Tci may follow at least one of the following formulas: Tci =M Tci-perTrp *N Trp ◇N Tci =M Tci-perCell *N Cell

[0267] N Tci , N Trp , N Cell , M Tci-perCell , M Tci-perTrp At least one of may be defined in the specification, provided by the RRC, or reported as a UE capability.

[0268] N Trp N may refer to the number of TRPs with the same PCI or different PCIs within a supercell / cell. Cell M may refer to the number of sub-cells with different PCIs within a super-cell / cell. Tci-perTrp M may refer to the number (maximum) of TCI states per TRP of a supercell / cell. Tci-perCell may refer to the number (maximum number) of TCI states per sub-cell of a super-cell / cell.

[0269] <<Application to Assumption 2>> At least one of the following features may be applied to the above-mentioned Assumption 2. ◇Multiple TCI states configured in the RRC configuration may be associated with SSB / CSI-RS of different PCIs. ◇N Cell Up to 100 different PCIs may be provided. Compared to the existing NR, Cellmay be greater than 8. ◇If N PCIs are provided, the N PCIs may include one serving cell PCI and N-1 additional PCIs that are different from the serving cell PCI.

[0270] RRC Signaling Structure The RRC signaling structure may follow at least one of several options below.

[0271] ◇Option 1: One list of N TCI states is provided for one supercell / cell. All TCI states in the single list may correspond to different TRPs / subcells and may be indexed from 0 to N-1. In the example of Figure 10, one TCI state list is configured for one supercell / cell. The TCI state list includes N TCI states. The N TCI states have indices (TCI state IDs) 0 to N-1, respectively.

[0272] ◇Option 2: One list of multiple TCI states is provided for each TRP of one supercell / cell. This option may follow at least one of several options 2-x below.

[0273] - ◇Option 2-1: All TCI states across all lists for all TRPs / subcells of a supercell / cell may be indexed from 0 to N-1 (N TCI states). In the example of Figure 11, X TCI state lists #0, #1, ..., #X-1 are configured for one supercell / cell, corresponding to X TRPs / subcells #0, #1, ..., #X-1 (TRP / subcell IDs = 0, 1, ..., X-1), respectively. TCI state list #i is M i The total number N of TCI states across TCI state lists #0, #1, ..., #X-1 (TCI state list ID = 0, 1, ..., X-1) is Σ i=0 X-1 M i M in TCI state list #i i For each TCI state, an index (TCI state ID) Σ k=0 i-1 Mk , (Σ k=0 i-1 M k )+1, …, (Σ k=0 i-1 M k )+M i The N TCI states in the X TCI state lists are indexed with indices 0, 1, ..., N-1, respectively.

[0274] - ◇Option 2-2: All TCI states in one list for one TRP / subcell of a supercell / cell may be indexed from 0 to M-1 (M TCI states). In the example of Figure 12, X TCI state lists #0, #1, ..., #X-1 (TCI state list ID = 0, 1, ..., X-1) corresponding to X TRP / subcells #0, #1, ..., #X-1 (TRP / subcell ID = 0, 1, ..., X-1) are configured for one supercell / cell. TCI state list #i is M i Contains M TCI states in TCI state list #i. i For each TCI state, index (TCI state ID) 0, 1, ..., M i Each is indexed with -1.

[0275] <<Other Application Examples>> In this embodiment, when the total number of TCI states set for one supercell / cell is 128 or less (the same as the maximum number in the existing NR), the maximum number N of the total number of TCI states set for one supercell / cell is 128 or less. Tci This can also be applied to cases where .times. ...

[0276] <<Relationship Between TRP / Subcell and TCI State>> The TCI states of the same TRP / subcell may have something in common.

[0277] UL transmissions may follow at least one of several associations 1-x below: Association 1-1: UL transmissions using the same TRP / subcell TCI state may be associated with the same timing advance (TA, timing advance group, TAG). UL transmissions using different TRP / subcell TCI states may be associated with different TAs (TAGs). Association 1-2: UL transmissions using the same TRP / subcell TCI state may be associated with the same power control parameter set. UL transmissions using different TRP / subcell TCI states may be associated with different power control parameter sets. A power control parameter set may include at least one of P0, alpha, and path loss. Association 1-3: UL transmissions using the same TRP / subcell TCI state may be associated with the same SRS resource set for codebook / non-codebook. UL transmissions using different TRP / subcell TCI states may be associated with different SRS resource sets for codebook / non-codebook. ◇Association 1-4: UL transmissions using the same TRP / subcell TCI state may be associated with the same scrambling ID. UL transmissions using different TRP / subcell TCI states may be associated with different scrambling IDs.

[0278] DL transmissions may follow at least one of the following associations 2-x: Association 2-1: DL transmissions using the same TRP / TCI state of a subcell may be associated with the same power control parameter set. DL transmissions using different TRP / TCI states of a subcell may be associated with different power control parameter sets. A power control parameter set may include at least one of the following: SSB transmit power, CSI-RS transmit power offset for SSB, and CSI-RS transmit power. Association 2-2: DL transmissions using the same TRP / TCI state of a subcell may be quasi-colocated with respect to several properties or may be QCL-aligned with respect to several QCL types. The several properties may include at least one of Doppler shift, mean delay, Doppler spread, and delay spread. The QCL types may include at least one of 'typeA', 'typeB', 'typeC', and 'typeD'. ◇ Association 2-3: DL transmissions using the same TRP / TCI state of a subcell may be associated with the same scrambling ID. DL transmissions using different TRP / TCI states of a subcell may be associated with different scrambling IDs.

[0279] According to this embodiment, the UE can be configured / indicated the TCI state appropriately even if the cell and TRP association is changed.

[0280] <Embodiment 0.2> This embodiment relates to DL / UL transmission of a single TRP / subcell (single TRP transmission).

[0281] <<Number of active TCI states>> X for one supercell / cell or for one BWP of one supercell / cell Tci Up to X TCI states may be activated by a MAC CE command (Activation MAC CE, Activation Command). Tci may be the maximum number of TCI states in a MAC CE command.

[0282] X Tci may be greater than 8. Tci may follow at least one of the following formulas: Tci = Y Tci-perTrp *N Trp ◇X Tci = Y Tci-perCell *N Cell

[0283] X Tci , N Trp , N Cell , Y Tci-perCell , Y Tci-perTrp At least one of may be defined in the specification, provided by the RRC, or reported as a UE capability.

[0284] N Trp N may refer to the number of TRPs with the same PCI or different PCIs in a supercell / cell for cooperative transmission. The cooperative transmission may also be dynamic switching between the TRPs. Cell Y may refer to the number of sub-cells with different PCIs in a super-cell / cell for coordinated transmission. The coordinated transmission may be dynamic switching between the TRPs. Tci-perTrp Y may refer to the number (maximum) of TCI states per TRP of a supercell / cell. Tci-perCell may refer to the number (maximum number) of TCI states per sub-cell of a super-cell / cell.

[0285] <<Application to Assumption 2>> At least one of the following features may be applied to the above-mentioned Assumption 2: Multiple TCI states activated by a MAC CE may be associated with SSB / CSI-RS of different PCIs. Cell Multiple TCI states of up to different PCIs may be activated. Compared to existing NR, Cellmay be greater than 8. ◇If multiple TCI states of N PCIs are activated, the N PCIs may include one serving cell PCI and N-1 additional PCIs different from the serving cell PCI, or may be N additional PCIs different from the serving cell PCI.

[0286] <<Other Application Examples>> This embodiment is applicable to a case where the total number of TCI states activated for one supercell / cell is 8 or less (the same as the maximum number in the existing NR) (the maximum number of TCI states activated for one supercell / cell X Tci is less than or equal to 8).

[0287] Activation of TCI States The MAC CE signaling structure, the mapping between the TCI states activated by the MAC CE and the codepoints of the TCI fields in the DCI, may follow at least one of several options:

[0288] Option 1: One MAC CE command activates multiple TCI states across all TRPs / subcells of one supercell / cell. Multiple codepoints of the TCI field in the DCI may be mapped to the multiple TCI states activated across all TRPs / subcells of one supercell / cell, respectively. Increasing the number of activated TCI states may cause signaling overhead. This option may have at least one of the following features:

[0289] In the example of Figure 13, one MAC CE activates multiple TCI states across all TRPs / subcells of one supercell / cell. The activated TCI states (TCI state IDs) 0, 2, 8, ... are mapped to multiple codepoints 0, 1, 2, ... of the TCI field in the DCI, respectively.

[0290] Option 2: One MAC CE command activates multiple TCI states for one TRP / subcell of one supercell / cell. Multiple codepoints of the TCI field in the DCI may be mapped to the multiple TCI states activated for one TRP / subcell of one supercell / cell, respectively. This option may have at least one of the following features:

[0291] The MAC CE may include an index corresponding to the TRP / subcell.

[0292] - The DCI may indicate an index corresponding to the TRP / subcell. This option may be represented by the following example:

[0293] In the example of Figure 14, a first MAC CE activates multiple TCI states for TRP / subcell #0 of one supercell / cell. The multiple TCI states (TCI state IDs) 1, 5, ..., 102 are mapped to multiple code points 0, 1, ... of the TCI field in the DCI for TRP / subcell #0, respectively. A second MAC CE activates multiple TCI states for TRP / subcell #1 of that supercell / cell. The multiple TCI states 134, 136, ..., 231 are mapped to multiple code points 0, 1, ... of the TCI field in the DCI for TRP / subcell #1, respectively. A third MAC CE activates multiple TCI states for TRP / subcell #2 of that supercell / cell. The multiple TCI states 267, 277, ..., 387 are mapped to multiple code points 0, 1, ..., respectively, of the TCI field in the DCI for TRP / subcell #2.

[0294] Option 3: One MAC CE command activates multiple TCI states for all TRPs / subcells of one supercell / cell. Multiple codepoints of the TCI field in the DCI may be mapped to the multiple TCI states activated for one TRP / subcell of one supercell / cell, respectively. This option may have at least one of the following features:

[0295] The first Y0 TCI states (first TCI state group #0) of the plurality of activated TCI states may correspond to the first TRP / subcell #0 of all TRPs / subcells of a supercell / cell. The next Y1 TCI states (second TCI state group #1) of the plurality of activated TCI states may correspond to the second TRP / subcell #1 of all TRPs / subcells of the supercell / cell.

[0296] - The DCI may indicate an index corresponding to the TRP / subcell. This option may be represented by the following example:

[0297] In the example of Figure 15, one MAC CE activates multiple TCI states across all TRPs / subcells of one supercell / cell. The first Y0 TCI states (TCI state IDs) 1, 5, ..., 102 of the activated TCI states are mapped to codepoints 0, 1, ..., respectively, of the TCI field in the DCI for TRP / subcell #0. The next Y1 TCI states 134, 136, ..., 231 of the activated TCI states are mapped to codepoints 0, 1, ..., respectively, of the TCI field in the DCI for TRP / subcell #1. The next Y2 TCI states 267, 277, ..., 387 of the activated TCI states are mapped to codepoints 0, 1, ..., respectively, of the TCI field in the DCI for TRP / subcell #2.

[0298] Option 4: One MAC CE command activates multiple TCI states for one TRP / subcell of one supercell / cell. Multiple codepoints of the TCI field in the DCI may be mapped to multiple TCI states that are activated across all TRPs / subcells of one supercell / cell, respectively. This option may have at least one of the following features:

[0299] The MAC CE may contain an index corresponding to one TRP / subcell.

[0300] - The first Y0 code points (first code point group #0) of the multiple code points in the TCI field in the DCI may correspond to the first TRP / subcell #0 of all TRPs / subcells of a supercell / cell. The next Y1 code points (second code point group #1) of the multiple code points in the TCI field in the DCI may correspond to the second TRP / subcell #1 of all TRPs / subcells of that supercell / cell. This option may be illustrated by the following example:

[0301] 16, a first MAC CE activates Y0 TCI states for TRP / subcell #0 of a supercell / cell. The Y0 TCI states (TCI state IDs) 1, 5, ..., 102 are mapped to the first Y0 codepoints 0, 1, ..., Y0-1, respectively, of the multiple codepoints in the TCI field of the DCI. A second MAC CE activates Y1 TCI states for TRP / subcell #1 of the supercell / cell. The Y1 TCI states 134, 136, ..., 231 are mapped to the next Y1 codepoints Y0, Y0+1, ..., Y0+Y1-1, respectively, of the multiple codepoints in the TCI field of the DCI. The third MAC CE activates Y2 TCI states for TRP / subcell #2 of that supercell / cell, which are mapped to the next Y2 codepoints Y0+Y1, Y0+Y1+1, ..., Y0+Y1+Y2-1 of the TCI field in the DCI, respectively.

[0302] According to this embodiment, even if the cell and TRP association changes, the UE can be properly configured / instructed to have a TCI state for a single TRP / subcell transmission (single TRP transmission).

[0303] <Embodiment 0.3> This embodiment relates to joint DL / UL transmission of multiple TRPs / sub-cells based on a single DCI (single DCI-based multi-TRP joint transmission).

[0304] <<Number of active TCI states>> X for one supercell / cell or for one BWP of one supercell / cell Tci Up to X TCI states may be activated by a MAC CE command (Activation MAC CE, Activation Command). Tci may be the maximum number of TCI states in a MAC CE command.

[0305] X Tci may be greater than 16.Tci may follow at least one of the following formulas: Tci = Y Tci-perTrp *N Trp ◇X Tci = Y Tci-perCell *N Cell ◇X Tci = Y Tci-perTciGroup *N TciGroup ◇X Tci = Y Tci-perTciGroup *N TciGroup-PerTrpGroup *N TrpGroup ◇X Tci = Y Tci-perTciGroup *NTciGroup-PerCellGroup*N CellGroup

[0306] X Tci , N Trp , N Cell , Y Tci-perCell , Y Tci-perTrp , Y Tci-perTciGroup , N TciGroup , N TciGroup-PerTrpGroup , N TrpGroup ,NTciGroup-PerCellGroup,N CellGroup At least one of may be defined in the specification, provided by the RRC, or reported as a UE capability.

[0307] N Trp may refer to the number of TRPs with the same PCI or different PCIs in a super-cell / cell for joint transmission. Trp may be greater than 2. Cell Y may refer to the number of sub-cells with different PCIs in a super-cell / cell for joint transmission. Tci-perTrp Y may refer to the number (maximum) of TCI states per TRP of a supercell / cell. Tci-perCell may refer to the number (maximum number) of TCI states per sub-cell of a super-cell / cell.

[0308] Y Tci-perTciGroup One group of N TCI states may be applied to joint transmission. TciGroupUp to Y groups may be activated. Compared to NR, Tci-perTciGroup may be greater than 2, and N TciGroup may be greater than 8.

[0309] Y Tci-perTciGroup A group of TCI states may be applied to joint transmission. A group of TRPs / subcells may be used for joint transmission. The MAC CE is TrpGroup For each group of TRPs, N TCI states may be activated. TciGroup-PerTrpGroup groups may be activated. CellGroup TCI states for up to groups may be activated. For each group of subcells, NTciGroup-PerCellGroup groups of TCI states may be activated. For example, if there are four TRP groups: {TRP#1, TRP#2}, {TRP#1, TRP#3}, {TRP#2, TRP#4}, and {TRP#3, TRP#4}, eight TCI state groups are activated for each TRP group, with each TCI state group containing two TCI states, for a total of 64 TCI states.

[0310] <<Application to Assumption 2>> For the above-mentioned Assumption 2, at least one of the following features may be applied. ◇In NR, single DCI-based multi-TRP joint transmission using different PCIs is not supported. In this embodiment, single DCI-based multi-TRP joint transmission using different PCIs is supported. ◇Multiple TCI states activated by the MAC CE may be associated with SSB / CSI-RS of different PCIs. One group of TCI states applied to joint transmission may be associated with SSB / CSI-RS of different PCIs. ◇N CellMultiple TCI states for up to N different PCIs may be activated. ◇When multiple TCI states for N PCIs are activated, the N PCIs may include one serving cell PCI and N-1 additional PCIs different from the serving cell PCI, or may be N additional PCIs different from the serving cell PCI. ◇Variation: Multiple TRPs may be associated with one PCI. Multiple TCI states activated by the MAC CE may be associated with SSB / CSI-RS for different PCIs. A group of TCI states applied to joint transmission may be associated with SSB / CSI-RS for the same PCI.

[0311] <<Other Application Examples>> This embodiment is applicable to a case where the total number of TCI states activated for one supercell / cell is 16 or less (the same as the maximum number in the existing NR) (the maximum number of TCI states activated for one supercell / cell X Tci is less than or equal to 16).

[0312] Activation of TCI States The MAC CE signaling structure, the mapping between the TCI states activated by the MAC CE and the codepoints of the TCI fields in the DCI, may follow at least one of several options:

[0313] Option 1: One MAC CE command activates multiple TCI states across all TRPs / subcells of one supercell / cell. One field in the DCI (e.g., the TCI field) may be used for TCI indication. Codepoint i of the TCI field in the DCI may be mapped to the Yi TCI states activated by the MAC CE. This option may have at least one of the following features:

[0314] -◇If code point i is indicated, the corresponding Yi TCI states may be used for joint transmission. If Yi=1, a single TRP / subcell transmission using the indicated TCI state may be performed. -◇The Yi TCI states may correspond to the Yi TRPs / subcells of one supercell / cell. -◇Yi may be 1, 2, ..., Ymax. -◇Ymax may be the maximum number of TCI states / TRPs / subcells used for joint transmission. -◇Different code points may be mapped to different numbers of TCI states. -◇The MAC CE may indicate the number of TCI states to which the code point is mapped. For example, the MAC CE may indicate Yi.

[0315] In the example of Figure 17, the UE receives one MAC CE activating multiple TCI states across all TRPs / subcells of one supercell / cell, and receives a DCI containing one TCI field. The activated TCI states are divided into groups of Y0, Y1, ... TCI states. Code point 0 of the TCI field indicates the first Y0 TCI states (TCI state IDs) 0, 133, ..., 301 of the activated TCI states. Code point 1 of the TCI field indicates the next Y1 TCI states 2, 156 of the activated TCI states.

[0316] Option 2: One MAC CE command activates multiple TCI states for one TRP / subcell of one supercell / cell. Ymax fields (e.g., TCI fields) in the DCI may be used for TCI indication. One codepoint in one field in the DCI may be mapped to one TCI state activated by the MAC CE. This option may have at least one of the following features:

[0317] Y fields out of Ymax fields may indicate valid TCI states, and the other fields may indicate code points indicating that the field is not used. Y may be 1, 2, ..., Ymax. Ymax may be the maximum number of TCI states / TRPs / subcells used for joint transmission. Y TCI states indicated by Y fields may be used for joint transmission. If Y=1, a single TRP / subcell transmission using the TCI state indicated by that field may be performed. For example, up to four TRPs / subcells may be used for joint transmission. There are four fields in the DCI. One, two, three, or four fields may indicate valid TCI states. One, two, three, or four TCI states / TRPs / subcells may be used for joint transmission. Variation: Zmax fields in the DCI may be used for TCI indication. Zmax may refer to the number of candidate TRPs / subcells. TRPs / subcells for joint transmission may be selected from the candidate TRPs / subcells. Y fields from the Zmax fields may indicate valid TCI states, and the other fields may indicate codepoints indicating that the field is not used. Y may be 1, 2, ..., Ymax. The Y TCI states indicated by the Y fields may be used for joint transmission. Ymax may be the maximum number of TCI states / TRPs / subcells used for joint transmission. Zmax ≧ Ymax. For example, in a case where there are six candidate TRPs / subcells and five fields in the DCI, up to four fields indicate valid TCI states, and up to four TRPs / subcells are used for joint transmission.

[0318] 18, the UE receives Y MAC CEs #0, #1, #2 corresponding to Y=3 TRP / subcells #0, #1, #2 (TRP / subcell IDs = 0, 1, 2) of one super-cell / cell, respectively, and receives DCI containing Y TCI fields. MAC CE #0 (the first MAC CE) activates Y0 TCI states for TRP / subcell #0 (the first TRP / subcell). The Y0 TCI states (TCI state IDs) 1, 5, ..., 102 are mapped to multiple codepoints 0, 1, ..., Y0-1 of TCI field #0 (the first TCI field) in the DCI. MAC CE#1 (second MAC CE) activates Y1 TCI states for TRP / subcell#1 (second TRP / subcell). The Y1 TCI states 134, 136, ..., 231 are mapped to multiple code points 0, 1, ..., Y1-1 of TCI field#1 (second TCI field) in the DCI. MAC CE#2 (third MAC CE) activates Y2 TCI states for TRP / subcell#2 (third TRP / subcell). The Y2 TCI states 267, 277, ..., 387 are mapped to multiple code points 0, 1, ..., Y2-1 of TCI field#2 (third TCI field) in the DCI.

[0319] Option 3: One MAC CE command activates multiple TCI states across all TRPs / subcells of one supercell / cell. One field (e.g., TCI field) in the DCI may correspond to one TRP / subcell of one supercell / cell. One codepoint in the DCI may be mapped to one TCI state activated by the MAC CE. This option may have at least one of the following features:

[0320] -◇Of the multiple TCI states activated by the MAC CE, the first Y0 TCI states (first TCI state group #0) may correspond to the first (#0) TRP / subcell / field, and the next Y1 TCI states (second TCI state group #1) may correspond to the second (#1) TRP / subcell / field. -◇Y fields from the Ymax fields may indicate valid TCI states, and the other fields may indicate code points indicating that the field is not used. Y may be 1, 2, ..., Ymax. -◇Ymax may be the maximum number of TCI states / TRPs / subcells used for joint transmission. -◇The Y TCI states indicated by the Y fields may be used for joint transmission. If Y=1, a single TRP / subcell transmission using one TCI state indicated by that one field may be performed. - Variation: Zmax fields in the DCI may be used for TCI indication. Zmax may refer to the number of candidate TRPs / subcells. The TRPs / subcells for joint transmission may be selected from the candidate TRPs / subcells. Y fields from the Zmax fields may indicate valid TCI states, and the other fields may indicate codepoints indicating that the field is not used. Y may be 1, 2, ..., Ymax. The Y TCI states indicated by the Y fields may be used for joint transmission. Ymax may be the maximum number of TCI states / TRPs / subcells used for joint transmission. Zmax may be ≧ Ymax. For example, there are six candidate TRPs / subcells. There are five fields in the DCI. Up to four fields indicate valid TCI states, and up to four TRPs / subcells are used for joint transmission.

[0321] In the example of Figure 19, a UE receives one MAC CE activating multiple TCI states across Y=3 TRP / subcells #0, #1, #2 (TRP / subcell IDs = 0, 1, 2) of one super-cell / cell, and receives a DCI containing Y TCI fields. The first Y0 TCI states (first TCI state group #0) of the activated multiple TCI states correspond to TRP / subcell #0 (first TRP / subcell). The Y0 TCI states (TCI state IDs) 1, 5, ..., 102 are mapped to multiple codepoints 0, 1, ..., Y0-1 of TCI field #0 (first TCI field) in the DCI, respectively. The next Y1 TCI states (second TCI state group #1) of the activated TCI states correspond to TRP / subcell #1 (second TRP / subcell). The Y1 TCI states 134, 136, ..., 231 are mapped to codepoints 0, 1, ..., Y1-1 of TCI field #1 (second TCI field) in the DCI. The next Y2 TCI states (third TCI state group #2) of the activated TCI states correspond to TRP / subcell #2 (third TRP / subcell). The Y2 TCI states 267, 277, ..., 387 are mapped to codepoints 0, 1, ..., Y2-1 of TCI field #2 (third TRP / subcell) in the DCI.

[0322] Option 4: One MAC CE command activates multiple TCI states for one TRP / subcell of one supercell / cell. One field in the DCI (e.g., the TCI field) may be used for TCI indication. Codepoint i of the TCI field in the DCI may be mapped to the Yi TCI states activated by the MAC CE. This option may have at least one of the following features:

[0323] -◇If code point i is indicated, the corresponding Yi TCI states may be used for joint transmission. If Yi=1, a single TRP / subcell transmission using the indicated TCI state may be performed. -◇The Yi TCI states may correspond to the Yi TRPs / subcells of one supercell / cell. -◇Yi may be 1, 2, ..., Ymax. -◇Ymax may be the maximum number of TCI states / TRPs / subcells used for joint transmission. -◇Different code points may be mapped to different numbers of TCI states.

[0324] 20, the UE receives Y MAC CEs #0, #1, #2 corresponding to Y=3 TRP / subcells #0, #1, #2 (TRP / subcell IDs = 0, 1, 2) of one super-cell / cell, respectively, and receives a DCI containing one TCI field. MAC CE #0 (the first MAC CE) activates Y TCI states for TRP / subcell #0 (the first TRP / subcell). The Y0 TCI states (TCI state IDs) 1, 5, ..., 102 are mapped to multiple codepoints 0, 1, ..., Y0-1 of the TCI field in the DCI, respectively. MAC CE #1 (the second MAC CE) activates Y1 TCI states for TRP / subcell #1 (the second TRP / subcell). The Y1 TCI states 134, 136, ..., 231 are mapped to multiple code points 0, 1, ..., Y1-1 of the TCI field in the DCI, respectively. MAC CE#2 (third MAC CE) activates Y2 TCI states for TRP / subcell#2 (third TRP / subcell), and the Y2 TCI states 267, 277, ..., 387 are mapped to multiple code points 0, 1, ..., Y2-1 of the TCI field in the DCI, respectively.

[0325] According to this embodiment, even if the cell and TRP association is changed, the UE can be properly configured / instructed to have a TCI state for joint transmission of multiple TRPs / subcells based on a single DCI (single DCI-based multi-TRP joint transmission).

[0326] <Embodiment 0.4> This embodiment relates to another aspect for joint DL / UL transmission of multiple TRPs / sub-cells based on a single DCI (single DCI-based multi-TRP joint transmission).

[0327] The TCI indication method may be similar to the Rel. 18 unified TCI framework in NR.

[0328] <<Number of Active TCI States>> The UE may maintain Zmax TCI states at all times. Zmax may be the number of candidate TRPs / subcells. Multiple TRPs / subcells for joint transmission may be selected from multiple candidate TRPs / subcells. For each of DL and UL transmissions, it may be indicated that Y TCI states / TRPs / subcells from Zmax TCI states / TRPs / subcells are used for joint transmission. If Y=1, a single TRP / subcell transmission (single-TRP transmission) may be performed. This TCI state may have at least one of the following characteristics: ◇Y may be 1, 2, ..., Ymax. Ymax may be the maximum number of TCI states / TRPs / subcells used for joint transmission. ◇Compared to NR, Zmax may be greater than 2, and Ymax may be greater than 2. ◇For example, in the case where there are six candidate TRPs / subcells and up to four TRPs / subcells are used for joint transmission, the UE is instructed to always maintain six TCI states and to use up to four TCI states from the six TCI states for joint transmission in each of the DL transmission and the UL transmission.

[0329] MAC CE activation in the TCI state may have at least one of the following characteristics: X for one supercell / cell or for one BWP of one supercell / cell Tci Up to X TCI states may be activated by a MAC CE command (Activation MAC CE, Activation Command). Tci may be the maximum number of TCI states in a MAC CE command. Tci may be greater than 16. Tci may follow at least one of the following formulas: Tci = Y Tci-perTrp *N Trp ―◇X Tci = Y Tci-perCell *N Cell ◇X Tci , N Trp , N Cell , Y Tci-perCell , Y Tci-perTrp , may be defined in the specification, may be provided by the RRC, or may be reported as a UE capability. Trp may refer to the number of TRPs with the same PCI or different PCIs in a super-cell / cell for joint transmission. Cell Y may refer to the number of sub-cells with different PCIs in a super-cell / cell for joint transmission. Tci-perTrp Y may refer to the number (maximum) of TCI states per TRP of a supercell / cell. Tci-perCell may refer to the number (maximum number) of TCI states per sub-cell of a super-cell / cell.

[0330] <<Application to Assumption 2>> For the above-mentioned Assumption 2, at least one of the following features may be applied: ◇Multiple TCI states activated by a MAC CE may be associated with SSB / CSI-RS of different PCIs. ◇N CellMultiple TCI states for up to N different PCIs may be activated. If multiple TCI states for N PCIs are activated, the N PCIs may include one serving cell PCI and N-1 additional PCIs different from the serving cell PCI, or may be N additional PCIs different from the serving cell PCI.

[0331] <<Other Application Examples>> This embodiment is applicable to a case where the total number of TCI states activated for one supercell / cell is 16 or less (the same as the maximum number in the existing NR) (the maximum number of TCI states activated for one supercell / cell X Tci can also be applied to cases where

[0332] Activation / Update of TCI States The MAC CE signaling structure, the mapping between the TCI states activated by the MAC CE and the codepoints of the TCI fields in the DCI, may follow at least one of several options: The signal structure is similar to embodiment 0.3, but the interpretation of the signal is different from embodiment 0.3.

[0333] Option 1: One MAC CE command activates multiple TCI states across all TRPs / subcells of one supercell / cell. One field in the DCI (e.g., the TCI field) may be used for TCI indication. Code point i of the TCI field in the DCI may be mapped to Zi TCI states activated by the MAC CE. This option may have at least one of the following features: If code point i is indicated, Zi TCI states from Zmax TCI states may be updated. Other TCI states may remain unchanged. Zi TCI states may correspond to Zi TRPs / subcells of one supercell / cell. Zi may be 1, 2, ..., Zmax. Different code points may be mapped to different numbers of TCI states. The MAC CE may indicate the number of the TCI state to which the codepoint is mapped. For example, the MAC CE may indicate Zi.

[0334] ◇Option 2: One MAC CE command activates multiple TCI states for one TRP / subcell of one supercell / cell. Zmax fields (e.g., TCI fields) in the DCI may be used for TCI indication. One field may correspond to one candidate TRP / subcell. One codepoint in one field may be mapped to one TCI state activated by the MAC CE. This option may have at least one of the following features: ◇Z fields out of Zmax fields may indicate valid TCI states, and the other fields may indicate codepoints indicating that the field is not used. Z may be 1, 2, ..., Zmax. ◇The Z TCI states indicated by the Z fields may be updated. The other TCI states may remain unchanged.

[0335] Option 3: One MAC CE command activates multiple TCI states across all TRPs / subcells of one supercell / cell. Zmax fields (e.g., TCI fields) in the DCI may be used for TCI indication. One field may correspond to one TRP / subcell of one supercell / cell. One code point in one field may be mapped to one TCI state activated by the MAC CE. This option may have at least one of the following features: - Of the multiple TCI states activated by the MAC CE, the first Y0 TCI states (first TCI state group #0) may correspond to the first (#0) TRP / subcell / field, and the next Y1 TCI states (second TCI state group #1) may correspond to the second (#1) TRP / subcell / field. - Z fields out of Zmax fields may indicate valid TCI states, and the other fields may indicate codepoints indicating that the field is not used. Z may be 1, 2, ..., Zmax. - Z TCI states indicated by the Z fields may be updated. Other TCI states may remain unchanged.

[0336] Option 4: One MAC CE command activates multiple TCI states for one TRP / subcell of one supercell / cell. One field in the DCI (e.g., the TCI field) may be used for TCI indication. Code point i of the TCI field in the DCI may be mapped to Zi TCI states activated by the MAC CE. This option may have at least one of the following features: If code point i is indicated, Zi TCI states from Zmax TCI states may be updated. Other TCI states may remain unchanged. Zi TCI states may correspond to Zi TRPs / subcells of one supercell / cell. Zi may be 1, 2, ..., Zmax. Different code points may be mapped to different numbers of TCI states.

[0337] In the example of Figure 21, the UE maintains Zmax = 6 active TCI states. The UE then receives a DCI containing Zmax TCI fields, the second of which indicates a valid TCI state. The UE updates the TCI state of the second TRP / subcell #1 (TRP / subcell ID = 1) to the indicated valid TCI state.

[0338] In the example of Figure 22, the UE maintains Zmax = 6 active TCI states. The UE then receives a DCI containing Zmax TCI fields, the second and fourth of which indicate valid TCI states. The UE updates the TCI state of the second TRP / subcell # (TRP / subcell ID = 1) 1 and the TCI state of the fourth TRP / subcell # 3 to the indicated two valid TCI states, respectively.

[0339] In the example of Figure 23A, the UE maintains Zmax = 6 active TCI states. The UE then receives an indication (e.g., DCI) to use Y = 2 TRP / subcell / TCI states out of the Zmax candidate TRP / subcell / TCI states for transmission. The UE uses the indicated second and third TRP / subcell / TCI states #1 and #2 (TRP / subcell IDs = 1 and 2) for joint transmission.

[0340] In the example of Figure 23B, the UE maintains Zmax = 6 active TCI states. The UE then receives an indication (e.g., DCI) to use Y = 4 TRP / subcell / TCI states out of the Zmax candidate TRP / subcell / TCI states for transmission. The UE uses the indicated first, second, fourth, and sixth TRP / subcell / TCI states #0, #1, #4, #6 (TRP / subcell IDs = 0, 1, 4, 6) for joint transmission.

[0341] In the example of Figure 23C, the UE maintains Zmax = 6 active TCI states. The UE then receives an indication (e.g., DCI) to use Y = 1 TRP / subcell / TCI state out of the Zmax candidate TRP / subcell / TCI states for transmission. The UE uses the second indicated TRP / subcell / TCI state #1 (TRP / subcell ID = 1) for single TRP / subcell transmission.

[0342] According to this embodiment, the UE can be properly configured / instructed on the TCI status for one or more TRPs / sub-cells even when the cell and TRP association is changed.

[0343] <Embodiment 0.5> This embodiment relates to joint DL / UL transmission of multiple TRPs / sub-cells based on multiple DCIs (multi-DCI based multi-TRP joint transmission).

[0344] Similar to NR, CORESET groups / pools (CORESET group, CORESET pool, CORESETPoolIndex) may be defined. MAC CE commands may activate TCI states for each CORESET group. Multiple codepoints in the TCI field in DCI may be mapped to multiple TCI states for the corresponding CORESET group, respectively.

[0345] In the present disclosure, a CORESET group may be a set of resources for DCI monitoring, for example, a group of search spaces / search space sets.

[0346] <<Relationship Between CORESET Groups and TRPs / Sub-Cells>> The relationship between CORESET groups and TRPs / sub-cells may follow at least one of several options below.

[0347] ◇Option 1: One CORESET group is mapped to one TRP / subcell of one supercell / cell. The UE may receive multiple DCIs (multi-DCI) in multiple CORESET groups (CORESETs in multiple CORESET groups), respectively. Joint transmission of multiple TRPs / subcells based on multi-DCI (multi-DCI-based multi-TRP joint transmission) may also be performed. This option may have at least one of the following features:

[0348] - Compared to NR, more than two CORESET groups may be configured by RRC.

[0349] -◇For one CORESET group, or for one supercell / cell, or for one BWP of one supercell / cell, X Tci Up to TCI states may be activated by a MAC CE command (Activation MAC CE, Activation Command).

[0350] - One field in the DCI (e.g., the TCI field) may be used for TCI indication, and one code point in the TCI field may be mapped to one TCI state.

[0351] -◇For one supercell / cell or for one BWP of one supercell / cell, in total, X Tci *N CORESET-Group Up to X TCI states may be activated. Tci *N Trp Up to X TCI states may be activated. Tci *N Cell Up to N TCI states may be activated. Each parameter may follow at least one of the following characteristics: Trp may refer to the number of TRPs with the same PCI or different PCIs in a super-cell / cell for coordinated / joint transmission. Trp may be greater than 2. Cell N may refer to the number of sub-cells with different PCIs in a super-cell / cell for coordinated / joint transmission. CORESET-Group may refer to the number of CORESET groups for cooperative / joint transmission. Compared with NR, N CORESET-Group may be greater than 2. Tci , N Trp , N Cell , N CORESET-Group At least one of may be defined in the specification, provided by the RRC, or reported as a UE capability.

[0352] For the above assumption 2, at least one of the following characteristics may be applied: Multiple TCI states activated by a MAC CE for one CORESET group may be associated with the SSB / CSI-RS of the same PCI. For one super-cell / cell, N CellMultiple TCI states associated with up to PCIs may be activated. Compared to NR, N Cell may be greater than 2. - When multiple TCI states of N PCIs are activated, the N PCIs may include one serving cell PCI and N-1 additional PCIs different from the serving cell PCI, or may be N additional PCIs different from the serving cell PCI.

[0353] - In the example of Figure 24, the UE receives Y MAC CEs #0, #1, #2 corresponding to Y=3 CORESET groups / TRPs / subcells #0, #1, #2 (CORESET group / TRP / subcell IDs = 0, 1, 2) of one supercell / cell, and receives DCI in the CORESET within each CORESET group. Each DCI contains one TCI field. MAC CE #0 (the first MAC CE) activates Y0 TCI states for CORESET group / TRP / subcell #0 (the first CORESET group / TRP / subcell). The Y0 TCI states (TCI state IDs) 1, 5, ..., 102 are mapped to multiple code points 0, 1, ..., Y0-1 of the TCI field in the DCI in CORESET group #0, respectively. MAC CE #1 (second MAC CE) activates Y1 TCI states for CORESET group / TRP / subcell #1 (second CORESET group / TRP / subcell). The Y1 TCI states 134, 136, ..., 231 are mapped to multiple code points 0, 1, ..., Y1-1 of the TCI field in the DCI in CORESET group #1, respectively. MAC CE#2 (the third MAC CE) activates Y2 TCI states for CORESET group / TRP / subcell#2 (the third CORESET group / TRP / subcell), and the Y2 TCI states 267, 277, ..., 387 are mapped to multiple code points 0, 1, ..., Y2-1 of the TCI field in the DCI in CORESET group#2, respectively.

[0354] Option 2: One CORESET group is mapped to multiple TRPs / subcells of one supercell / cell. Single TRP / subcell transmission with dynamic TRP / subcell switching based on DCI within one CORESET group may be performed. This option may have at least one of the following features:

[0355] - Compared to NR, more than two CORESET groups may be configured by RRC.

[0356] - For one CORESET group in one supercell / cell or in one BWP of one supercell / cell, X is assigned by MAC CE. Tci Up to X TCI states may be activated. Tci may follow at least one of the following formulas: Tci = Y Tci-perTrp *N Trp ――◇X Tci = Y Tci-perCell *N Cell

[0357] Each parameter may comply with at least one of the following characteristics: Trp may refer to the number of TRPs with the same PCI or different PCIs that are associated with the same CORESET group of supercells / cells for cooperative transmission. Trp One TRP may be used with dynamic switching between N TRPs. Cell may refer to the number of sub-cells with different PCIs that are associated with the same CORESET group of super-cells / cells for cooperative transmission. Cell One TRP based on dynamic switching between subcells may be used. Tci-perTrp Y may refer to the number (maximum) of TCI states per TRP of a supercell / cell. Tci-perCellmay refer to the number (maximum) of TCI states per subcell of a supercell / cell. - ◇ For one supercell / cell or for one BWP of one supercell / cell, in total, X Tci *N CORESET-Group Up to N TCI states may be activated. CORESET-Group may refer to the number of CORESET groups in one supercell / cell or in one BWP of one supercell / cell. Tci , N Trp , N Cell , Y Tci-perTrp , Y Tci-perCell , N CORESET-Group , at least one of which may be defined in the specification, provided by the RRC, or reported as a UE capability.

[0358] For the above assumption 2, at least one of the following characteristics may be applied: Multiple TCI states activated by a MAC CE for one CORESET group may be associated with SSB / CSI-RS of different PCIs. Cell Multiple TCI states associated with up to N different PCIs may be activated for one super-cell / cell. Multiple TCI states associated with up to N different PCIs may be activated for one super-cell / cell. N is N Cell or N Cell *N CORESET-Group --When multiple TCI states of N PCIs are activated, the N PCIs may include one serving cell PCI and N-1 additional PCIs different from the serving cell PCI, or may be N additional PCIs different from the serving cell PCI.

[0359] Option 3: One CORESET group is mapped to multiple TRPs / subcells of one supercell / cell. Joint transmission of multiple TRPs / subcells based on a single DCI within one CORESET group (single DCI-based multi-TRP joint transmission) may be performed. This option may have at least one of the following features:

[0360] - Compared to NR, more than two CORESET groups may be configured by RRC.

[0361] - For one CORESET group in one supercell / cell or in one BWP of one supercell / cell, X is assigned by MAC CE. Tci Up to X TCI states may be activated. Tci may follow at least one of the following formulas: Tci = Y Tci-perTrp *N Trp ――◇X Tci = Y Tci-perCell *N Cell ――◇X Tci = Y Tci-perTciGroup *N TciGroup ――◇X Tci = Y Tci-perTciGroup *N TciGroup-perTrpGroup *N TrpGroup ――◇X Tci = Y Tci-perTciGroup *NTciGroup-perCellGroup*N CellGroup

[0362] Each parameter may comply with at least one of the following characteristics: Trp may refer to the number of TRPs with the same PCI or different PCIs that are associated with the same CORESET group of supercells / cells for joint transmission. Cell Y may refer to the number of sub-cells with different PCIs associated with the same CORESET group of super-cells / cells for joint transmission. Tci-perTrpY may refer to the number (maximum) of TCI states per TRP of a supercell / cell. Tci-perCell Y may refer to the number of TCI states (maximum) per supercell / subcell of a cell. Tci-perTciGroup A group of N TCI states may be applied. The MAC CE TciGroup groups may be activated. Compared to NR, Y Tci-perTciGroup can be greater than 2. For joint transmission, Y Tci-perTciGroup A group of TCI states may be applied. A group of TRPs / subcells may be used for joint transmission. The MAC CE is TrpGroup For each group of TRPs, N TCI states may be activated. TciGroup-perTrpGroup groups may be activated. CellGroup For each group of subcells, NTciGroup-perCellGroup groups of TCI states may be activated. - A total of X TCI states may be activated for one supercell / cell or for one BWP of one supercell / cell. Tci *N CORESET-Group Up to N TCI states may be activated. CORESET-Group may refer to the number of CORESET groups in one supercell / cell or in one BWP of one supercell / cell. Tci , N Trp , N Cell , Y Tci-perTrp , Y Tci-perCell , N CORESET-Group , Y Tci-perTciGroup , N TciGroup , N TciGroup-perTrpGroup , N TrpGroup , NTciGroup-perCellGroup, N CellGroup , at least one of which may be defined in the specification, provided by the RRC, or reported as a UE capability.

[0363] -◇For the above assumption 2, at least one of the following features may be applied: -◇Multiple TCI states activated by a MAC CE for one CORESET group may be associated with SSB / CSI-RS of different PCIs. A group of TCI states applied to single DCI-based joint transmission may be associated with SSB / CSI-RS of different PCIs. -◇For one CORESET group, N Cell Multiple TCI states associated with up to N different PCIs may be activated for one super-cell / cell. Multiple TCI states associated with up to N different PCIs may be activated for one super-cell / cell. N is N Cell or N Cell *N CORESET-Group ◇When multiple TCI states for N PCIs are activated, the N PCIs may include one serving cell PCI and N-1 additional PCIs different from the serving cell PCI, or may be N additional PCIs different from the serving cell PCI. ◇Variation: Multiple TRPs may be associated with one PCI. Multiple TCI states activated by the MAC CE for one CORESET group may be associated with SSB / CSI-RS for different PCIs. One group of TCI states applicable to single DCI-based joint transmission may be associated with SSB / CSI-RS for the same PCI. ◇Variation: Multiple TRPs may be associated with one PCI. Multiple TCI states activated by the MAC CE for one CORESET group may be associated with SSB / CSI-RS for the same PCI. A group of TCI states applied to a single DCI-based joint transmission may be associated with the SSB / CSI-RS of the same PCI.

[0364] <<Application of Other Embodiments>> The MAC CE signaling structure, the mapping between the TCI state activated by the MAC CE and the codepoint of the TCI field in the DCI, may be adapted from Embodiments 0.2, 0.3, and 0.4 by applying the same to each CORESET group.

[0365] According to this embodiment, even if the cell and TRP association changes, the UE can be properly configured / instructed on the TCI status for single or multiple TRPs / sub-cells based on single DCI or multi-DCI.

[0366] <Embodiment 0.6> This embodiment relates to MAC CE overhead.

[0367] To reduce MAC CE overhead, the following method may be applied to at least one of embodiments 0.1 to 0.5.

[0368] Updating a Subset of Active TCI States A MAC CE command (Activation MAC CE, Activation Command) may update a subset of TCI states for one supercell / cell or for one TRP / subcell of one supercell / cell. Other TCI states activated by previous MAC CE commands may be maintained. This embodiment may follow at least one of the following options:

[0369] Option 1: A subset of activated TCI states may be replaced by a new subset of activated TCI states. In the example of Figure 25, the MAC CE indicates TCI states (TCI state IDs) 10, 12, and 43 for the third, fourth, and fifth TCI states (TCI states corresponding to code points 2, 3, and 4) of the activated TCI states. In response to receiving the MAC CE, the UE updates the indicated active TCI states and maintains (does not update) the active TCI states other than the indicated TCI states.

[0370] Option 2: A subset of activated TCI states may be updated to be deactivated (released). In the example of Figure 26, the MAC CE indicates the deactivation of the third, fourth, and fifth TCI states (TCI states corresponding to code points 2, 3, and 4) among the activated TCI states. In response to receiving the MAC CE, the UE deactivates the indicated TCI states and maintains the active TCI states other than the indicated TCI states.

[0371] Option 3: A new subset of TCI states may be activated, while previously activated TCI states may remain activated. In the example of Fig. 27, the MAC CE indicates TCI states (TCI state IDs) 120, 201, and 222. Upon receiving the MAC CE, the UE adds the indicated TCI states (associates the indicated TCI states with additional code points) and maintains active TCI states other than the indicated TCI states.

[0372] <<Subset Indication Contents>> The subset indication may follow at least one of the following options: ◇Option 1: The MAC CE indicates a subset of TCI states. For example, the MAC CE may indicate a subset of TCI states including the (i+1)th activated TCI state, or a subset of TCI states including the (i+1)th to (#i+L)th activated TCI states, or a subset of TCI states including the {i+1, j+1, k+1, ...}th activated TCI states. ◇Option 2: The MAC CE indicates a subset of code points. For example, the MAC CE may indicate the (i+1)th code point i, or the (i+1)th to (i+L)th code points i to i+L-1, or the {i+1, j+1, k+1, ...}th code points {i, j, k, ...}. A subset of the TCI states mapped to the indicated subset of code points may be updated.

[0373] According to this embodiment, even when the cell and TRP association is changed, the UE can be appropriately configured / instructed to have the TCI state set while reducing overhead.

[0374] <Embodiment 0.7> This embodiment relates to non-group-based beam reporting.

[0375] In the present disclosure, the indexes / IDs of multiple [CMR group / TRP / sub-cell] may be replaced by the index / ID of one [CMR group / TRP / sub-cell combination]. In the present disclosure, the index / ID of one [CMR group / TRP / sub-cell combination] may be associated / mapped to the indexes / IDs of multiple [CMR group / TRP / sub-cell].

[0376] [Embodiment 0.7.1] 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.

[0377] 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.

[0378] 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.

[0379] 28A and 28B are diagrams showing an example of CMR groups and CMRs. In Fig. 28A, five CMR groups (CMR groups 1-5) are set, and the same number of CMRs (here, four) are set for each CMR group.

[0380] The UE selects / reports one or more CMR groups and one or more CMRs from among the multiple CMR groups and multiple CMRs in Figure 28 A. In Figure 28B, 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 Figure 28 A, 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).

[0381] 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.

[0382] 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.

[0383] CMRs contained in different CMR groups may be transmitted simultaneously over the network.

[0384] According to this embodiment, the UE can select / report the CMR appropriately.

[0385] [Embodiment 0.7.2] When non-group-based beam reporting is configured, multiple groups of 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.

[0386] 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.

[0387] 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.

[0388] Figures 29A and 29B show examples of CMR groups and CMRs. In Figure 29A, 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.

[0389] 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 Figure 29 A. In Figure 29B, 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 Figure 29 A, 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).

[0390] 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.

[0391] 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.

[0392] According to this embodiment, the UE can select / report the CMR appropriately.

[0393] [Embodiment 0.7.3A] 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 specifications, 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.

[0394] 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.

[0395] 30A and 30B are diagrams showing an example of CMR groups and CMRs. In Fig. 30A, five CMR groups (CMR groups 1-5) are set, and the same number of CMRs (here, four) are set for each CMR group.

[0396] 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 Figure 30A. In Figure 30B, 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 Figure 30A, 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).

[0397] According to this embodiment, the UE can select / report the CMR appropriately.

[0398] [Embodiment 0.7.3B] 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 a specification 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 a specification 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.

[0399] 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.

[0400] Figures 31A and 31B are diagrams showing an example of CMR groups and CMRs. In Figure 31A, 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.

[0401] 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 Figure 31 A. In Figure 31B, 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 Figure 31 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).

[0402] According to this embodiment, the UE can select / report the CMR appropriately.

[0403] [Embodiment 0.7.4] 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.

[0404] 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.

[0405] 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.

[0406] 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.

[0407] 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.

[0408] 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.

[0409] 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.

[0410] 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.

[0411] 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.

[0412] 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.

[0413] 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.

[0414] 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.

[0415] [Embodiment 0.7.5] 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.

[0416] In the above Option 1-1, one ZP-IMR may be set for each CMR.

[0417] 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.

[0418] 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.

[0419] 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.

[0420] In the above Option 2-1, one NZP-IMR may be set for each CMR.

[0421] 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.

[0422] 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.

[0423] [Embodiment 0.7.6] 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.

[0424] [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.

[0425] The UE may generate a CSI report using all beam indices corresponding to all selected / reported CMRs.

[0426] 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.

[0427] 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.

[0428] Figure 32A shows an example of a CSI report created according to Option 1-1. Figure 32A 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.

[0429] [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.

[0430] 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).

[0431] Figure 32B shows an example of a CSI report created according to Option 1-2A. Figure 32B 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.

[0432] 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).

[0433] Figure 32C shows an example of a CSI report created according to Option 1-2B. Figure 32C 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.

[0434] 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.

[0435] [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).

[0436] In the CSI report, the beam with the largest L1-RSRP / L1-SINR value among all CMRs may be mapped / placed before other beams.

[0437] [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).

[0438] 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.

[0439] 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.

[0440] [Option 3-A] As shown in FIG. 33A, the L1-RSRP / L1-SINR values ​​for each beam may be mapped / located immediately after the corresponding beam index.

[0441] [Option 3-B] As shown in FIG. 33B, the L1-RSRP / L1-SINR values ​​for the beams per CMR group may be mapped / arranged after the beam index per CMR group.

[0442] [Option 3-C] As shown in FIG. 33C, the L1-RSRP / L1-SINR values ​​for all beams may be mapped / placed after all beam indices.

[0443] According to this embodiment, the size and mapping of the CSI report can be appropriately determined.

[0444] [Variation of embodiment 0.7] 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) does not have to be configured by the network. In other words, the UE may determine at least one of M, N, and K.

[0445] 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'.

[0446] 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.

[0447] 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 0.7.6.

[0448] 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 per 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 per beam according to embodiment 0.7.6.

[0449] 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 selected / reported per CMR group (N) / Number of CMRs selected / reported across CMR groups (K) ZP-IMR / NZP-IMR configuration One or more restrictions as described in embodiment 0.7.4.

[0450] The MAC CE may include a CMR group ID / TRP ID / subcell ID.

[0451] 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.

[0452] 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.

[0453] For each TRP / CMR group, the RLM-RS / BFD-RS / PL-RS may be updated as the reporting beam for the corresponding CMR group.

[0454] According to the embodiment 0.7 described above, non-group-based beam reporting can be appropriately controlled.

[0455] <Embodiment 0.8> This embodiment relates to group-based beam reporting.

[0456] [Embodiment 0.8.1] 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 contain the same number of CMRs (e.g., Y CMRs), or each CMR group may contain a different number of CMRs. The UE may select / report P joint report groups.

[0457] Each joint reporting group may include multiple CMR groups and may include Q CMRs (Q satisfies Q≦X) across the multiple CMR groups.

[0458] In each joint reporting group, there may be a maximum of one CMR selected / reported from one CMR group.

[0459] 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).

[0460] 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.

[0461] The UE may report capability information indicating that it supports group-based beam reporting for multiple CMR groups.

[0462] 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.

[0463] 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.

[0464] 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.

[0465] Fig. 34 shows an example of CMR groups and CMRs. In Fig. 34, 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.

[0466] Figure 35 shows an example of CMR groups and CMRs reported by a UE in Option 1. In Figure 35, 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 34. 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 Figure 35, 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).

[0467] Figure 36 shows an example of CMR groups and CMRs reported by a UE in Option 2. In Figure 36, 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 34. 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. 36, 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).

[0468] According to this embodiment, the UE can select / report the CMR appropriately.

[0469] [Embodiment 0.8.2] 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.

[0470] 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 Q ２and the number of CMRs in one third joint reporting group is Q ３ may be.

[0471] In each joint reporting group, there may be a maximum of one CMR selected / reported from one CMR group.

[0472] The UE may receive CMRs in one joint reporting group simultaneously, and the network may transmit CMRs in different CMR groups simultaneously.

[0473] 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.

[0474] 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.

[0475] 37 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 Figure 37, the UE reports one first joint report group, one second joint report group, and one third joint report group. １ = 1, Q ２= 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 37, 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).

[0476] According to this embodiment, the UE can select / report the CMR appropriately.

[0477] [Embodiment 0.8.3] As in embodiment 0.7.4, restrictions may be set for CMRs set for each CMR group and / or for CMRs in different CMR groups.

[0478] When L1-SINR is set as the report quantity, the setting of ZP-IMR may be the same as in embodiment 0.7.5.

[0479] When L1-SINR is set as the report quantity, the setting of NZP-IMR may be the same as in embodiment 0.7.5.

[0480] [Embodiment 0.8.4] 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.

[0481] 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.

[0482] In embodiment 0.8.1, for each joint reporting group, ２ The ID of the joint reporting group with the (P)) bit may or may not be explicitly reported.

[0483] In embodiment 0.8.2, 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.

[0484] 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.

[0485] The UE may generate a CSI report using all beam indices corresponding to all selected / reported CMRs.

[0486] Figures 38A and 38B are diagrams illustrating an example of a CSI report. Figure 38A 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 selected / reported joint reporting group. For example, CSI field sets #A1 and #A2 may correspond to joint reporting groups #1 and #2, respectively, in embodiment 0.8.1. The number of CSI field sets may be the same as the number of selected / reported joint reporting groups. As shown in FIG. 38A, when the number of CMRs per joint reporting group is the same (as in embodiment 0.8.1), the number of beam indices per CSI field set is the same.

[0487] Figure 38B 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 indexes 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 0.8.2, respectively. The number of CSI field sets may be the same as the number of selected / reported joint reporting groups. As shown in Figure 38B, when the number of CMRs per joint reporting group is different (as in embodiment 0.8.2), the number of beam indices per CSI field set is different.

[0488] One CSI field may indicate the L1-RSRP / L1-SINR value for the beam.

[0489] Similar to embodiment 0.7.6, the L1-RSRP / L1-SINR values ​​for each beam may be mapped / located immediately after the corresponding beam index.

[0490] Similar to embodiment 0.7.6, the L1-RSRP / L1-SINR values ​​for the beams per joint report group may be mapped / placed after the beam index per joint report group.

[0491] Similar to embodiment 0.7.6, the L1-RSRP / L1-SINR values ​​for all beams may be mapped / placed after all beam indices.

[0492] For quantization of the L1-RSRP / L1-SINR values ​​for each beam, the following option A or B may be used.

[0493] [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).

[0494] 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.

[0495] [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.

[0496] 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.

[0497] The UE may support configuration of periodic / aperiodic / semi-persistent beam reporting in UCI or event-triggered beam reporting via MAC CE.

[0498] [Variation of embodiment 0.8] The 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.

[0499] 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.

[0500] 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.

[0501] 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.

[0502] 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.

[0503] 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 0.7.4

[0504] The MAC CE may include a CMR group ID / TRP ID / subcell ID.

[0505] 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.

[0506] 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.

[0507] For each TRP / CMR group, the RLM-RS / BFD-RS / PL-RS may be updated as the reporting beam for the corresponding CMR group.

[0508] According to the embodiment 0.8 described above, group-based beam reporting can be appropriately controlled.

[0509] <Embodiment 0.9> This embodiment relates to conditions for an SRS resource set / SRS resource.

[0510] Note that this embodiment may be applied to a cell-free configuration, or may be applied to a configuration that is not a cell-free configuration.

[0511] The purpose of the SRS may be set to a specific purpose (e.g., beam management / non-codebook / codebook / antenna switching).

[0512] A UE may be configured with multiple SRS resource sets.

[0513] One SRS resource set may correspond to one / multiple TRPs / subcells / UE panels.

[0514] For multiple SRS resource sets, one or more conditions may be applied / considered. The UE may assume / determine that one or more conditions apply for multiple SRS resource sets.

[0515] The condition may be at least one of the following options 1-1 to 1-10.

[0516] <<Option 1-1>> The condition may be, for example, a condition regarding a beam that applies to multiple SRS resource sets / SRS resources.

[0517] When SRS resources are configured for a specific application (e.g., beam management) with information about the beam (e.g., spatial relationship / TCI state), the QCL source RSs for multiple SRS resources within one SRS resource set may have the same RS type.

[0518] The RS type may be, for example, at least one of synchronization signal (eg, SSB) only, CSI-RS only, and SRS only.

[0519] The RS types of the QCL source RSs for multiple SRS resources in different SRS resource sets may be determined separately.

[0520] For example, the QCL source RSs for multiple SRS resources in different SRS resource sets may each have a different RS type.

[0521] <<Option 1-2>> The condition may be, for example, a condition regarding physical cell IDs (PCIs) corresponding to multiple SRS resource sets / SRS resources.

[0522] QCL source RSs / associated RSs for multiple SRS resources in one SRS resource set may be associated with the same PCI.

[0523] The PCIs associated with the QCL source RSs / associated RSs for multiple SRS resources in different SRS resource sets may be determined separately.

[0524] For example, the QCL source RSs / associated RSs for multiple SRS resources in different SRS resource sets may be associated with different PCIs.

[0525] <<Option 1-3>> The condition may be, for example, a condition regarding transmission / reception timing (for example, timing advance) corresponding to a plurality of SRS resource sets / SRS resources.

[0526] The SRS resources in one SRS resource set may be associated with the same Timing Advance (TA) / TA Group (TAG).

[0527] The TA / TAG associated with the SRS resources in different SRS resource sets may be determined separately.

[0528] For example, SRS resources in different SRS resource sets may be associated with different TAs / TAGs.

[0529] <<Option 1-4>> The condition may be, for example, a condition regarding transmission / reception timing (for example, timing advance) corresponding to a plurality of SRS resource sets / SRS resources.

[0530] For each SRS resource set, an offset in terms of timing advance (eg, n-TimingAdvanceOffset) may be configured / associated / supported.

[0531] <<Option 1-5>> The condition may be, for example, a condition regarding transmission and reception timing (for example, DL reference timing) corresponding to a plurality of SRS resource sets / SRS resources.

[0532] For each SRS resource set, DL reference timing may be configured / associated / supported.

[0533] <<Option 1-6>> The condition may be, for example, a condition regarding transmission power control applied to a plurality of SRS resource sets / SRS resources.

[0534] For each SRS resource set, a pathloss RS and / or transmit power control (TPC) parameters (e.g., parameters related to p0 / α / PC adjustment state) may be configured / associated / supported.

[0535] <<Option 1-7>> The condition may be, for example, a condition related to a specific ID corresponding to multiple SRS resource sets / SRS resources.

[0536] The SRS resources in one SRS resource set may be associated with at least one of the same channel measurement resource (CMR) group ID, TRP / subcell ID, and UE panel ID.

[0537] At least one of the CMR group ID, the TRP subcell ID, and the UE panel ID associated with the SRS resources in different SRS resource sets may be determined separately.

[0538] For example, SRS resources in different SRS resource sets may be associated with at least one of different channel measurement resource (CMR) group IDs, TRP / subcell IDs, and UE panel IDs.

[0539] If the UE reports a capability for simultaneous transmission of a particular panel, it may perform simultaneous transmission on the SRS resource set associated with the corresponding panel, otherwise it may perform time division multiplexing transmission on the SRS resource set associated with the corresponding panel.

[0540] Figure 39 is a diagram showing an example of allocation of SRS resource sets / SRS resources according to Options 1-7. In the example shown in Figure 39, SRS resource sets #1 to #3 are allocated to a UE. In the example shown in Figure 39, SRS resources in one SRS resource set are associated with the same TRP (TRP ID) (Figure 39 shows an example in which one SRS resource set includes two SRS resources). Also, in the example shown in Figure 39, SRS resources in different SRS resource sets are associated with different TRPs (TRP IDs).

[0541] <<Option 1-8>> The condition may be, for example, a condition regarding a beam (repetition-based beam) that applies to multiple SRS resource sets / SRS resources.

[0542] For each SRS resource set, the NW / base station may indicate the same / different beam for each set by setting repetition to "on" or "off".

[0543] <<Option 1-9>> The condition may be, for example, a condition regarding multiple SRS resource sets / SRS resources (for example, overlapping SRS resources).

[0544] The SRS resources in different SRS resource sets may be non-overlapping.

[0545] The UE may assume that the SRS resources in different SRS resource sets do not overlap.

[0546] <<Options 1-10>> The condition may be, for example, a condition regarding multiple SRS resource sets / SRS resources (for example, simultaneous transmission of SRS resources).

[0547] The UE may assume that it can simultaneously transmit on multiple SRS resources from a certain maximum number (eg, X) of SRS resource sets based on its reported UE capabilities.

[0548] One SRS resource in each SRS resource set may be transmitted at a particular time instance.

[0549] The specified maximum number may be, for example, a number (e.g., 32 or 64) greater than the existing maximum number of SRS resource sets (e.g., 16). By configuring in this way, a greater number of SRS resource sets can be supported / configured.

[0550] The maximum number of SRS resource sets may be determined based on UE capability information.

[0551] Additionally, the maximum number of SRS resources for each SRS resource set may be determined based on UE capability information.

[0552] <<Variation 1 of Embodiment 0.9>> One SRS resource set (each SRS resource set) may be associated with one PCI, and the one SRS resource set may be associated with multiple TRPs.

[0553] A plurality of subsets may be configured for one SRS resource set (each SRS resource set), and one subset (each subset) of the plurality of subsets may be associated with one TRP (TRP ID) / TA / TAG.

[0554] For example, the above options 1-1 / 1-3 / 1-4 / 1-5 / 1-6 / 1-7 / 1-8 / 1-9 may be applied to each of the plurality of subsets.

[0555] Fig. 40 is a diagram illustrating an example of allocation of SRS resource sets / SRS resources according to Variation 1 of Embodiment 0.9. In the example illustrated in Fig. 40, SRS resource sets #1 and #2 are allocated to a UE. In the example illustrated in Fig. 40, SRS resource set #1 is associated with PCI #1, and SRS resource set #2 is associated with PCI #2.

[0556] In the example shown in Fig. 40, subsets #1 and #2 are configured within SRS resource set #1. The subset #1 (SRS resources included therein) and the subset #2 (SRS resources included therein) are associated with different TRPs (TRP IDs).

[0557] <<Variation 2 of Embodiment 0.9>> One SRS resource set (each SRS resource set) may be associated with specific multiple TRPs.

[0558] The specific TRPs may be, for example, co-located TRPs (TRPs with the same TA / TAG / TA offset / DL reference timing). In other words, the TA / TAG / TA offset / DL reference timing may be different for each SRS resource set.

[0559] A plurality of subsets may be configured for one SRS resource set (each SRS resource set), and one subset (each subset) of the plurality of subsets may be associated with one TRP (TRP ID) / PCI / path loss RS.

[0560] For example, the above options 1-1 / 1-2 / 1-6 / 1-7 / 1-8 / 1-9 may be applied to each of the plurality of subsets.

[0561] With this configuration, different restrictions / conditions can be applied to each SRS resource set, and the UE / NW can respond / operate in accordance with various situations.

[0562] Fig. 41 is a diagram showing an example of allocation of SRS resource sets / SRS resources according to Variation 2 of Embodiment 0.9. In the example shown in Fig. 41, SRS resource sets #1 and #2 are allocated to a UE. In the example shown in Fig. 41, SRS resource set #1 is associated with PCI #1 and PCI #2, and SRS resource set #2 is associated with PCI #3. The TRP corresponding to PCI #1 and the TRP corresponding to PCI #2 are co-located.

[0563] In the example shown in Fig. 41, subsets #1 and #2 are configured within SRS resource set #1. The subset #1 (SRS resources included therein) and the subset #2 (SRS resources included therein) are associated with different TRPs (TRP IDs).

[0564] In addition, in embodiment 0.9, in different SRS usage cases, at least one of the applicable conditions, the maximum number of SRS resource sets, and the maximum number of SRS resources per SRS resource set may be determined / set separately (differently).

[0565] According to this embodiment, conditions related to the SRS resource set / SRS resource can be appropriately defined, and efficient beam measurement / reporting can be performed.

[0566] <Embodiment 0.10> This embodiment relates to UL transmission (eg, SRS transmission) for a deactivated SCell.

[0567] The UE may be configured with certain new RRC parameters, such as parameters related to UL transmissions for the deactivated SCell (e.g., triggering of SRS (e.g., aperiodic SRS) transmissions).

[0568] The UE may support triggering of SRS (e.g., aperiodic SRS) transmission for deactive SCells.

[0569] The configuration of the SRS resource set for SRS (e.g., aperiodic SRS) for a deactive SCell may follow embodiment 0.9 above.

[0570] A carrier indicator field (CIF) may be included in a particular DCI format (e.g., a DCI format for scheduling a DL channel (e.g., DCI format 1_0 / 1_1 / 1_2) / a DCI format for scheduling a UL channel (e.g., DCI format 0_0 / 0_1 / 0_2)).

[0571] When a particular new RRC parameter is configured, the UE may determine / assume that the number of bits of the carrier indicator field is greater than the number of bits in the existing 5G NR (e.g., 3 bits) (e.g., 4 or 5 bits).

[0572] For example, the possible values ​​of an RRC parameter (e.g., cif-InSchedulingCell) indicating the CIF value used in the scheduling cell may be extended from the existing range (e.g., from 1 to 7). The extended range may be, for example, from 1 to 15 or from 1 to 31.

[0573] When new RRC parameters are configured for the UE, the CIF indicated for the SCell may be activated or deactivated.

[0574] A specific DCI format (e.g., DCI formats 0_0 / 0_1 / 0_2 / 1_0 / 1_1 / 1_2 / 2_1 / 2_2) may include an SRS offset field.

[0575] If the CIF indicated for the SCell is deactivated, the UE may determine / assume that the particular DCI format includes a field for an additional SRS offset.

[0576] The field (value) for the additional offset may be specified in advance in a specification, may be configured / notified to the UE using RRC / MAC CE, may be determined based on a report of UE capability information, or may be determined based on a combination of these.

[0577] When a specific new RRC parameter is configured and a trigger configuration for a first type (e.g., Type A) of SRS transmission is configured, the value of an RRC parameter (e.g., cc-IndexInOneCC-Set) indicating a CC index within one component carrier (CC) set may be extended from an existing range (e.g., from 0 to 7). The extended range may be, for example, from 0 to 15 or from 0 to 31.

[0578] When certain new RRC parameters are configured and a trigger configuration for a second type (e.g., Type B) of SRS transmission is configured, a new carrier indicator field may be added to one or more DCI formats for UEs (e.g., a DCI format used for transmitting a group of TPC commands for SRS transmission (DCI format 2_3)) to indicate the cell ID of the SRS request field.

[0579] When a UE transmits SRS in a deactivated SCell, existing behavior regarding collision handling between different CCs may apply, for example, when a UE transmits SRS in a deactivated SCell, it may determine / assume that it has no other UL transmissions in other cells.

[0580] Also, existing UE behavior may be applied, for example, for different UE capabilities (e.g., UE capability for simultaneous transmission and reception for inter-band CA (e.g., between TDD and TDD, or between TDD and FDD), or UE capability for half-duplex UE operation in TDD with the same subcarrier spacing).

[0581] According to this embodiment, SRS transmission to a deactive SCell can be performed appropriately.

[0582] <Embodiment 0.11> This embodiment relates to CSI reporting for a deactivated SCell.

[0583] Certain new RRC parameters may be configured for the UE, such as parameters related to UL transmissions for the deactivated SCell (e.g., triggering of CSI reporting (e.g., aperiodic CSI reporting)).

[0584] The specific new RRC parameters may be parameters common to the new RRC parameters in the above embodiment 0.10, or may be parameters different from the new RRC parameters in the above embodiment 0.10.

[0585] The CMR measurement / reporting configuration for CSI reporting (aperiodic CSI reporting) of a deactive SCell may follow at least one of the methods detailed below.

[0586] A carrier indicator field (CIF) may be included in certain DCI formats (DCI formats 1_0 / 1_1 / 1_2 / 0_0 / 0_1 / 0_2 / 2_1 / 2_2).

[0587] When a particular new RRC parameter is configured, the UE may determine / assume that the number of bits of the carrier indicator field is greater than the number of bits in the existing 5G NR (e.g., 3 bits) (e.g., 4 or 5 bits).

[0588] For example, the possible values ​​of an RRC parameter (e.g., cif-InSchedulingCell) indicating the CIF value used in the scheduling cell may be extended from the existing range (e.g., from 1 to 7). The extended range may be, for example, from 1 to 15 or from 1 to 31.

[0589] When a trigger for aperiodic SRS and a trigger for aperiodic CSI reporting are supported / configured, the UE may determine to use a common CIF included in the DCI. In other words, when a trigger for aperiodic SRS and a trigger for aperiodic CSI reporting are supported / configured, the CIF included in the DCI may be a field common to the trigger for aperiodic SRS and the trigger for aperiodic CSI reporting.

[0590] In embodiment 0.11, the CMR measurement / reporting settings described in embodiments 0.7 / 0.8 may be applied.

[0591] According to this embodiment, CSI reporting for inactive SCells can be performed appropriately.

[0592] <Embodiment 0.12> This embodiment relates to application of beams (TCI state / spatial relationship / QCL assumptions) when using SCells (for example, deactive SCells).

[0593] In the present disclosure, beam, reference signal (e.g., SSB / CSI-RS / TRS / SRS / any other reference signal), TCI state, DL / UL / joint TCI state, spatial relationship, QCL assumption, QCL information, RS resource of a particular QCL type, etc. may be read interchangeably.

[0594] The UE may apply at least some of the beam-related configurations of other cells different from a particular cell (e.g., SCell (deactive SCell)) to the particular cell.

[0595] <<Embodiment 0.12-1>> For a beam for SRS resources in a specific cell / CC (e.g., serving cell #A (SCell#A / CC#A)), the use / reference / configuration of RS resources / spatial relationships / TCI states of a specific QCL type from other cells / CCs (e.g., PCell#B / SCell#B / CC#B) may be supported.

[0596] For example, the UE may utilize / reference the configuration of a beam (e.g., RS resource / spatial relationship / TCI state of a particular QCL type) from another cell / CC (e.g., PCell#B / CC#B) for a beam for SRS resources in a particular cell / CC (e.g., serving cell#A (SCell#A / CC#A)).

[0597] The beam configuration may be configured in the UE using, for example, higher layer signaling (RRC / MAC CE).

[0598] The specific QCL type may include, for example, at least QCL type D. Alternatively, the specific type may be QCL type A / B / C / D.

[0599] By determining / setting the beam for a specific CC (CC#A) based on the beam management / beam setting of another CC (PCell#B / CC#B) in this way, the network / base station can limit the beam reporting for the specific CC (CC#A), thereby reducing the time required for beam management on that specific CC.

[0600] Note that this embodiment may be applied to the beam for SRS transmission according to the above embodiment 0.10, for example.

[0601] 42 is a diagram illustrating an example of beam application according to embodiment 0.12. In the example illustrated in FIG. 42, a UE completes beam management in CC #B (PCell). The UE is configured with an RS of CC #B for beam management (e.g., a QCL type D RS) in CC #A (SCell).

[0602] <<Embodiment 0.12-2>> For CSI-RS resources / CMR in a specific cell / CC (e.g., serving cell #A (SCell#A / CC#A)), the use / reference / configuration of beams (e.g., RS resources / spatial relationships / TCI states of a specific QCL type) from other cells / CCs (e.g., PCell#B / SCell#B / CC#B) may be supported.

[0603] For example, the UE may utilize / reference the configuration of beams (e.g., RS resources / spatial relationships / TCI states of a particular QCL type) from other cells / CCs (e.g., PCell#B / SCell#B / CC#B) for CSI-RS resources / CMR in a particular cell / CC (e.g., serving cell#A (SCell#A / CC#A)).

[0604] The beam configuration may be configured in the UE using, for example, higher layer signaling (RRC / MAC CE).

[0605] The specific QCL type may include, for example, at least QCL type D. Alternatively, the specific type may be QCL type A / B / C / D.

[0606] In this way, by determining / setting the CSI-RS resources / CMR of a specific CC (CC #A) based on the beam management / beam setting of another CC (CC #B), the network / base station can reduce the time required to set up the specific CSI report.

[0607] Note that this embodiment may be applied to resources related to CSI reporting according to embodiments 0.7 / 0.8 / 0.11, for example.

[0608] <<Embodiment 0.12-3>> For beam configuration for reference signals (e.g., SSB / CSI-RS / TRS) in a specific cell / CC (e.g., serving cell #A (SCell#A / CC#A)), the use / reference / configuration of beams (e.g., RS resources / spatial relationships / TCI states of specific QCL types) from other cells / CCs (e.g., PCell#B / SCell#B / CC#B) may be supported.

[0609] For example, the UE may utilize / reference the configuration of a beam (e.g., RS resource / spatial relationship / TCI state of a particular QCL type) from another cell / CC (e.g., PCell#B / SCell#B / CC#B) for the beam configuration for a reference signal (e.g., SSB / CSI-RS / TRS) in a particular cell / CC (e.g., serving cell#A (SCell#A / CC#A)).

[0610] The beam configuration may be configured in the UE using, for example, higher layer signaling (RRC / MAC CE).

[0611] The specific QCL type may include, for example, at least QCL type D. Alternatively, the specific type may be QCL type A / B / C / D.

[0612] In this way, by determining / setting the beam of a reference signal of a specific CC (CC #A) based on the beam management / beam setting of another CC (CC #B), more sustainable and low-overhead communications can be achieved.

[0613] In addition, embodiment 0.12 (embodiment 0.12-1 / 0.12-2 / 0.12-3) may be applied when the UE supports / reports corresponding UE capability information.

[0614] Also, in embodiment 0.12, the use of information about a specific QCL type (eg, QCL type B) may be applied in the case of an intra-frequency CA scenario.

[0615] According to embodiment 0.12, the beam to be used in an SCell (e.g., a deactive SCell) can be efficiently determined.

[0616] Embodiment 1 This embodiment relates to the activation of TCI state using MAC CE when TRP / subcell selection is indicated.

[0617] <<Embodiment 1-1>> One MAC CE may activate multiple TCI states from one TRP / subcell.

[0618] An index of one TRP / subcell (TRP / subcell index) may be indicated in the MAC CE for activation of the TCI state.

[0619] One TRP / subcell index may be indicated in a signal other than a MAC CE for TCI state activation, e.g., higher layer signaling, another MAC CE, or DCI. In other words, one TRP / subcell may be activated.

[0620] One TRP / subcell index may be reported / requested by the UE via UCI / MAC CE. Reporting of one TRP / subcell index may be triggered by the base station. Alternatively, reporting of one TRP / subcell index may be initiated by the UE, such as in a UE-initiated beam report. The base station may transmit / feedback an acknowledgement (ACK) / negative acknowledgement (NACK) in response to the UE's report / request. One TRP / subcell may be activated after the UE's report after receiving an ACK from the base station.

[0621] The size of one TRP / subcell index field is ceil(log ２ (N ＴＲＰ )) bits. ＴＲＰ may be the number of TRPs / subcells configured in one cell / supercell.

[0622] The size of one TRP / subcell index field is ceil(log ２ (maxN ＴＲＰ )) bits. ＴＲＰ may be the maximum number of TRPs / subcells configured in one cell / supercell. ＴＲＰ may be specified in the specification or may be a value based on UE capability information.

[0623] For the TCI state indication field in the MAC CE, multiple TCI states of an indicated TRP / subcell may be indexed. For example, if the TCI state indication field in the MAC CE indicates TCI ID=0, the first TCI state of the multiple TCI states configured for the indicated / activated TRP / subcell may be activated. For example, if the TCI state indication field in the MAC CE indicates TCI ID=1, the second TCI state of the multiple TCI states configured for the indicated / activated TRP / subcell may be activated.

[0624] The number of TCI status indication fields in a MAC CE may be one or more.

[0625] The size of the TCI status indication field in the MAC CE is ceil(log ２ (N ＴＣＩ－ＴＲＰ )) bits. ＴＣＩ－ＴＲＰ may be the number of TCI states set for one indicated TRP / subcell.

[0626] The size of the TCI status indication field in the MAC CE is ceil(log ２ (maxN ＴＣＩ－ＴＲＰ )) bits. ＴＣＩ－ＴＲＰ may be the maximum number of TCI states configured for one TRP / subcell. ＴＣＩ－ＴＲＰ may be specified in the specification or may be a value based on UE capability information.

[0627] Figure 43 shows an example of the correspondence between the TCI state indication field and the TRP / subcell. In Figure 43, if the TRP / subcell index #1 is indicated / activated by higher layer signaling, a MAC CE (the MAC CE for TCI state activation described above or other MAC CE), or a DCI, the TCI state indicated / activated by the TCI state indication field of the MAC CE for TCI state activation corresponds to the TCI state of the TRP / subcell index #1. If TRP / subcell index #2 is indicated / activated by higher layer signaling, a MAC CE (such as the MAC CE for TCI state activation described above or other MAC CEs), or a DCI, the TCI state indicated / activated by the TCI state indication field of the MAC CE for TCI state activation corresponds to the TCI state of TRP / subcell index #2. If TRP / subcell index #N is indicated / activated by higher layer signaling, a MAC CE (such as the MAC CE for TCI state activation described above or other MAC CEs), or a DCI, the TCI state indicated / activated by the TCI state indication field of the MAC CE for TCI state activation corresponds to the TCI state of TRP / subcell index #N. One or more TCI states indicated / activated in the TCI state indication field of the MAC CE for TCI state activation may be mapped to one or more codepoints of the TCI field in the DCI.

[0628] <<Embodiment 1-2>> One MAC CE may activate multiple TCI states from multiple TRPs / subcells.

[0629] Multiple TRPs / subcells may be indicated in the MAC CE for TCI state activation.

[0630] Multiple TRPs / subcells may be indicated in a signal other than the MAC CE for TCI state activation, e.g., other signals (RRC signaling / MAC CE / DCI). In other words, multiple TRPs / subcells may be activated.

[0631] Multiple TRPs / subcells may be reported / requested by the UE via UCI / MAC CE. Reporting of multiple TRPs / subcells may be triggered by the base station. Alternatively, reporting of multiple TRPs / subcells may be initiated by the UE, such as in a UE-initiated beam report. The base station may transmit / feedback an acknowledgement (ACK) / negative acknowledgement (NACK) in response to the UE's report / request. Multiple TRPs / subcells may be activated after the UE's report after receiving an ACK from the base station.

[0632] The method for indicating multiple TRPs / subcells may follow at least one of the following methods A1, A1', A2.

[0633] [Method A1] Multiple TRP / subcell indices may be indicated.

[0634] The size of each TRP / subcell index field is ceil(log ２ (N ＴＲＰ )) bits. ＴＲＰ may be the number of TRPs / subcells configured in a cell / supercell.

[0635] The size of each TRP / subcell index field is ceil(log ２ (maxN ＴＲＰ )) bits. ＴＲＰ may be the maximum number of TRPs / subcells configured in one cell / supercell. ＴＲＰ may be specified in the specification or may be a value based on UE capability information.

[0636] [Method A1′] Multiple TRPs / subcells may be indicated via a bitmap.

[0637] In method A1', each bit in the bitmap may correspond to one TRP / subcell.

[0638] For example, a bit value corresponding to a particular TRP / subcell set to 1 may mean that the particular TRP / subcell is selected / activated, and a bit value corresponding to a particular TRP / subcell set to 0 may mean that the particular TRP / subcell is not selected / activated.

[0639] For example, a bit value corresponding to a particular TRP / subcell set to 0 may mean that the particular TRP / subcell is selected / activated, and a bit value corresponding to a particular TRP / subcell set to 1 may mean that the particular TRP / subcell is not selected / activated.

[0640] The size of the bitmap may be the number of TRPs / subcells in a cell / supercell, for example, if there are X TRPs / subcells in a cell / supercell, the size of the bitmap may be X bits.

[0641] The size of the bitmap may be the maximum number of TRPs / subcells that can be configured in one cell / supercell. For example, if a maximum of Y TRPs / subcells can be configured in one cell / supercell, the size of the bitmap may be Y bits. In this case, the size of the bitmap (Y) may be specified in the specification or may be a value based on the UE capability information.

[0642] [Method A2] For one TRP / subcell group / combination (TRP / subcell group) including multiple TRPs / subcells, an index of one TRP / subcell group (TRP / subcell group index) may be indicated.

[0643] The TRP / sub-cell group may be used for coordinated transmission and reception with the UE.

[0644] The grouping of multiple TRPs / subcells may follow at least one of groupings A and B below.

[0645] [Grouping A] A grouping of multiple TRPs / subcells may be configured / indicated by RRC signaling / MAC CE / DCI. A mapping / correspondence between TRP / subcell group index and TRP / subcell may be configured / indicated by RRC signaling / MAC CE / DCI.

[0646] [Grouping B] The grouping of multiple TRPs / subcells may be determined by the UE according to a specific rule. The mapping / correspondence between TRP / subcell group indexes and TRPs / subcells may be determined by the UE according to a specific rule. The TRP / subcell group index may be one-to-one mapped to all possible groupings according to the TRPs / subcells configured in a cell / supercell and the number of TRPs / subcells in the TRP / subcell group. The number of TRPs / subcells in a TRP / subcell group may be configured / indicated by RRC signaling / MAC CE / DCI, or may be a value based on UE capability information.

[0647] For example, in grouping B, 10 TRPs / subcells (#1, #2, ..., #10) may be configured, and four TRPs / subcells may be included in one TRP / subcell group. In this case, the number of all possible groupings is C(10, 4) = 210. Specifically, one TRP / subcell group may be one TRP / subcell combination among 210 TRP / subcell combinations, such as {#1, #2, #3, #4}, {#1, #2, #3, #5}, ..., {#1, #3, #4, #5}, ..., {#2, #3, #4, #5}, ...

[0648] In the above groupings A and B, the number of TRPs / subcells in all TRP / subcell groups may be the same. For example, all TRP / subcell groups may each include two TRPs / subcells, or all TRP / subcell groups may each include four TRPs / subcells. Note that the number of TRPs / subcells in a TRP / subcell group is not limited to the above number.

[0649] In the above groupings A and B, the number of TRPs / subcells in different TRP / subcell groups may be the same or different. For example, the first TRP / subcell group may include two TRPs / subcells, the second TRP / subcell group may include four TRPs / subcells, and the third TRP / subcell group may include two TRPs / subcells. Note that the number of TRPs / subcells in a TRP / subcell group is not limited to the above number.

[0650] The size of the TRP / Subcell Group Index field is ceil(log ２ (N ＴＲＰｇｒｏｕｐ )) bits. ＴＲＰｇｒｏｕｐ may be the number of TRPs / sub-cell groups in one cell / super-cell.

[0651] N ＴＲＰｇｒｏｕｐ For all possible groupings of TRPs / subcells, if all TRP / subcell groups have the same number of TRPs / subcells, if X TRPs / subcells are configured in one cell / supercell, and if Y TRPs / subcells are configured in one TRP / subcell group, then N ＴＲＰｇｒｏｕｐ may be C(X,Y).

[0652] N ＴＲＰｇｒｏｕｐ For , all possible groupings of TRPs / subcells are included, and the number of TRPs / subcells in different TRP / subcell groups may be different, and X TRPs / subcells are configured in one cell / supercell, and Y TRPs / subcells are configured in the Mth TRP / subcell group. Ｍ If N TRPs / subcells are included, ＴＲＰｇｒｏｕｐ is C(X, Y１ ) + C(X, Y ２ ) + ... + C(X, Y Ｍ ) may also be used.

[0653] The size of the TRP / Subcell Group Index field is ceil(log ２ (maxN ＴＲＰｇｒｏｕｐ )) bits. ＴＲＰｇｒｏｕｐ may be the number of TRP / sub-cell groups that can exist in one cell / super-cell. ＴＲＰｇｒｏｕｐ may be specified in the specification or may be a value based on UE capability information.

[0654] The number of TCI states activated in the MAC CE for each indicated / activated TRP may be fixed, specifically, the number may be specified in the specification, configured by RRC signaling, or according to UE capability information.

[0655] The number of TCI states activated in the MAC CE for each indicated / activated TRP may be variable, and may be subject to at least one of the following: a maximum number specified in the specification, a maximum number configured by RRC signaling, and a maximum number according to UE capability information.

[0656] Regarding the number of TCI states activated in MAC CEs for different TRPs, the number of TCI states activated for all indicated / activated TRPs may be common / same.

[0657] Regarding the number of TCI states activated in a MAC CE for different TRPs, the number of TCI states activated for different TRPs may be different or the same.

[0658] For the TCI state indication field in the MAC CE, multiple TCI states of one TRP / subcell may be indexed. For example, if the TCI state indication field in the MAC CE indicates TCI ID=0, the first TCI state of the multiple TCI states configured for one TRP / subcell may be activated. For example, if the TCI state indication field in the MAC CE indicates TCI ID=1, the second TCI state of the multiple TCI states configured for one TRP / subcell may be activated.

[0659] The size of the TCI status indication field in the MAC CE may follow at least one of the following methods B1 and B2.

[0660] [Method B1] The size of the TCI status indication field in the MAC CE is ceil(log ２ (N ＴＣＩ－ＴＲＰ )) bits. ＴＣＩ－ＴＲＰ may be the number of TCI states set for one indicated TRP / subcell.

[0661] [Method B2] The size of the TCI status indication field in the MAC CE is ceil(log ２ (maxN ＴＣＩ－ＴＲＰ )) bits. ＴＣＩ－ＴＲＰ may be the maximum number of TCI states configured for one TRP / subcell. ＴＣＩ－ＴＲＰ may be specified in the specification or may be a value based on UE capability information.

[0662] If multiple TRPs / subcells are indicated, the UE needs to know which TRP / subcell the TCI status indication field in the MAC CE corresponds to. The correspondence between the TCI status indication field and the TRP / subcell when multiple TRPs / subcells are indicated may follow at least one of the following methods C1 and C2.

[0663] [Method C1] First X １The TCI status indication fields correspond to the first TRP / subcell, and the next X ２ The TCI status indication fields correspond to the second TRP / subcell, ..., the next X Ｍ This TCI status indication field may correspond to the Mth TRP / subcell.

[0664] The number of TCI states activated for multiple TRPs / subcells may be the same, i.e., X １ =X ２ =...=X Ｍ may be.

[0665] The number of TCI states activated for different TRPs / subcells may be the same or different. １ , X ２ , …, X Ｍ may be the same or different.

[0666] The number of TCI states activated for each TRP / subcell and the number of TCI state indication fields mapped to each TRP / subcell may be specified in the specification, may be a value based on UE capability information, may be indicated in the MAC CE for TCI state activation, or may be indicated in other RRC signaling / MAC CE / DCI.

[0667] Figure 44 shows an example of a correspondence between TCI state indication fields and TRPs / subcells according to method C1. In Figure 44, the TCI state indicated / activated by the TCI state indication fields #1 to #X1 of the MAC CE for TCI state activation corresponds to the TCI state of the first TRP / subcell. Also, the TCI state indicated by the TCI state indication fields #X1+1 to #X1+X2 of the MAC CE for TCI state activation corresponds to the TCI state of the second TRP / subcell. The X1 TCI states for the first TRP / subcell indicated / activated in the TCI state indication fields #1 to #X1 of the MAC CE for TCI state activation may be mapped to one or more code points of the TCI field in the DCI. In addition, the X2 TCI states for the second TRP / subcell indicated / activated in the TCI state indication fields #X1+1 to #X1+X2 of the MAC CE for TCI state activation may be mapped to one or more code points of the TCI field in the DCI.

[0668] [Method C2] First X １ The TCI status indication fields correspond to the first codepoint of the TCI field in the DCI, and the next X ２ The TCI status indication fields correspond to the second codepoint of the TCI field in the DCI, ..., the next X Ｍ This TCI status indication field may correspond to the Mth code point of the TCI field in the DCI.

[0669] The number of TCI states mapped to all code points of the TCI field in the DCI may be the same, i.e., X １ =X ２ =...=X Ｍ =X.

[0670] Specifically, X TRPs / subcells may be indicated / activated. Each codepoint of the TCI field in the DCI may be mapped to X TCI states and mapped to X TRPs / subcells. X TCI state indication fields in the MAC CE, which correspond to one codepoint of the TCI field in the DCI, may be one-to-one mapped to the X TRPs / subcells.

[0671] The number of TCI states mapped to different code points of the TCI field in the DCI may be the same or different. １ , X ２ , …, X Ｍ may be the same or different.

[0672] Specifically, X TRPs / subcells may be indicated / activated. ｉ X TRPs / subcells are mapped to X TCI states. ｉ The TRPs / subcells in the MAC CE may be mapped to codepoint i of the TCI field in the DCI. ｉ The TCI status indication fields are X ｉ There may be a one-to-one mapping for TRPs / subcells.

[0673] The number of TRPs / subcells to which each codepoint is mapped (i.e., X ｉ value) and which X TRPs / subcells each code point is in ｉ The number of TRPs / subcells to be mapped may be indicated in the MAC CE for TCI state activation or may be indicated in other RRC signaling / MAC CE / DCI.

[0674] Figure 45 shows an example of a mapping between TCI state indication fields and TRPs / subcells according to method C2. The TCI state indicated / activated by the TCI state indication field #1 of the MAC CE for TCI state activation corresponds to the TCI state of the first TRP / subcell and is mapped to the first codepoint of the DCI. The TCI state indicated / activated by the TCI state indication field #2 of the MAC CE for TCI state activation corresponds to the TCI state of the second TRP / subcell and is mapped to the second codepoint of the DCI. The TCI state indicated / activated by the TCI state indication field #X1 of the MAC CE for TCI state activation corresponds to the TCI state of the X1-th TRP / subcell and is mapped to the X1-th codepoint of the DCI.

[0675] According to the first embodiment, when a TRP / subcell selection instruction is given, the TCI state can be appropriately activated using the MAC CE.

[0676] <Embodiment 2> This embodiment relates to group-based beam reporting.

[0677] [Premise 1] As described in embodiments 1-2, for a MAC CE for activating multiple TCI states, the selection / activation of multiple TRPs / sub-cells may be indicated by indicating multiple TRP / sub-cell indices and / or TRP / sub-cell group indices in the MAC CE or other signals (RRC signaling / MAC CE / DCI).

[0678] [Premise 2] As described in embodiments 0.7 and 0.8, for non-group-based beam reporting and group-based beam reporting, the MAC CE (or DCI) may indicate / activate multiple [CMR groups / TRPs / sub-cells] by indicating the indexes of multiple [CMR groups / TRPs / sub-cells] or the index of a single [CMR group / TRP / sub-cell combination].

[0679] The MAC CE / DCI used in the above Premises 1 and 2 may be the same MAC CE / DCI or different MAC CEs.

[0680] For group-based beam reporting, the UE may report at least one of multiple [CMR group ID / TRP ID / subcell ID], a bitmap indicating multiple [CMR groups / TRP / subcell], and an index of one [CMR group combination] / [TRP / subcell group].

[0681] The size of the [CMR group ID / TRP ID / sub-cell ID] field may be the same as the size of the TRP / sub-cell index field in method A1 of embodiment 1-2. In other words, method A1 of embodiment 1-2 in which [TRP / sub-cell index] is replaced with [CMR group ID / TRP ID / sub-cell ID] may be applied to this embodiment.

[0682] The size of the bitmap indicating multiple [CMR groups / TRPs / subcells] may be the same as the size of the bitmap indicating multiple [TRPs / subcells] in method A1' of embodiment 1-2. In other words, method A1' of embodiment 1-2, in which [TRPs / subcells] are replaced with [CMR groups / TRPs / subcells], may be applied to this embodiment.

[0683] The grouping of [CMR group combination] / [TRP / sub-cell group]] may be the same as the grouping of [TRP / sub-cell] in method A2 of embodiment 1-2. That is, method A2 of embodiment 1-2 in which [TRP / sub-cell] is replaced with [CMR group / TRP / sub-cell] may be applied to this embodiment. The size of the index field of [CMR group combination] / [TRP / sub-cell group]] may be the same as the size of the TRP / sub-cell group index field in method A2 of embodiment 1-2. That is, method A2 of embodiment 1-2 in which [TRP / sub-cell group] is replaced with [CMR group combination] / [TRP / sub-cell group] may be applied to this embodiment.

[0684] Each reported CMR may be re-indexed within the CMRs of the reported [CMR group / TRP / sub-cell].

[0685] The size of the field indicating each reported CMR is ceil(log ２ (N ＣＭＲｐｅｒＴＲＰ )) bits. ＣＭＲｐｅｒＴＲＰ may be the number of CMRs configured for one reported [CMR group / TRP / subcell].

[0686] The size of the field indicating each reported CMR is ceil(log ２ (maxN ＣＭＲｐｅｒＴＲＰ )) bits. ＣＭＲｐｅｒＴＲＰ may be the maximum number of CMRs configured for one [CMR group / TRP / subcell]. ＣＭＲｐｅｒＴＲＰ may be specified in the specification or may be a value based on UE capability information.

[0687] When the UE reports P joint reporting groups of CMR according to embodiment 0.8, at least one of the following options 1 and 2 may be applied.

[0688] [Option 1] One [CMR group combination / TRP / sub-cell group] that applies to all P joint reporting groups may be reported by the UE.

[0689] Figures 46A and 46B show an example of a CSI report according to Option 1. Figures 46A and 46B show mapping of CSI fields included in one CSI report for CRI / RSRP or SSBRI / RSRP reporting. In Figure 46A, one CSI field may include any of the following: a joint reporting group ID, a beam index (CRI / SSBRI) corresponding to one CMR, or a [CMR group combination] / [TRP / sub-cell group] ID. In Figure 46A, one [CMR group combination] / [TRP / sub-cell group] may be applied to joint reporting groups #1 and #2.

[0690] In Figure 46B, one CSI field may include one joint reporting group ID, one beam index (CRI / SSBRI) corresponding to one CMR, or one [CMR group ID / TRP ID / subcell ID]. In Figure 46B, two [CMR group / TRP / subcell] may be applied to joint reporting groups #1 and #2.

[0691] [Option 2] One applicable [CMR group combination / TRP / sub-cell group] for each of the P joint reporting groups may be reported by the UE.

[0692] Figures 47A and 47B show an example of a CSI report according to Option 2. Figures 47A and 47B show mapping of CSI fields included in one CSI report for CRI / RSRP or SSBRI / RSRP reporting. In Figure 47A, one CSI field may include any of the following: a joint reporting group ID, a beam index (CRI / SSBRI) corresponding to one CMR, and a [CMR group combination] / [TRP / sub-cell group] ID. In Figure 47A, one [CMR group combination] / [TRP / sub-cell group] for joint reporting group #1 may be applied to joint reporting group #1, and one [CMR group combination] / [TRP / sub-cell group] for joint reporting group #2 may be applied to joint reporting group #2.

[0693] In Figure 47B, one CSI field may include one joint reporting group ID, one beam index (CRI / SSBRI) corresponding to one CMR, or one [CMR group ID / TRP ID / subcell ID]. In Figure 47B, two [CMR group / TRP / subcell] for joint reporting group #1 may apply to joint reporting group #1, and two [CMR group / TRP / subcell] for joint reporting group #2 may apply to joint reporting group #2.

[0694] If one joint reporting group includes Q CMRs and Q [CMR groups / TRPs / subcells] are reported, the Q CMRs may be one-to-one mapped to the Q [CMR groups / TRPs / subcells].

[0695] Embodiment 0.8 and embodiment 2 may be extended to allow a UE to simultaneously apply multiple CMRs in a joint reporting group for UL transmission (simultaneous transmission of multiple panels).

[0696] According to embodiment 2, in group-based beam reporting, the UE can properly report the CMR.

[0697] Third Embodiment This embodiment relates to configuration / indication of an SRS resource set.

[0698] X SRS resource sets whose usage is set to codebook (CB) may be configured by RRC signaling, or X SRS resource sets whose usage is set to non-codebook (NCB) may be configured by RRC signaling.

[0699] In this disclosure, an [SRS / SRS resource / SRS resource set] with usage set to CB may mean an [SRS / SRS resource / SRS resource set] for UL channel sounding for a UL transmission scheme with a precoder codebook.

[0700] In this disclosure, an [SRS / SRS resource / SRS resource set] with usage set to NCB may refer to an [SRS / SRS resource / SRS resource set] for UL channel sounding for a UL transmission scheme without a precoder codebook.

[0701] For each CB / NCB PUSCH transmission, one or more SRS resource sets may be indicated in the DCI scheduling the UL transmission (UL scheduling DCI). The PUSCH transmission may be associated with one or more SRS resource sets. The association of the PUSCH transmission with the SRS resource sets may follow at least one of options 1 and 2 below.

[0702] [Option 1] One or more SRS resource sets associated with one PUSCH transmission may be indicated from among X SRS resource sets configured by RRC signaling.

[0703] [Option 2] Among the X SRS resource sets (configured by RRC signaling), Y SRS resource sets may be selected / activated by MAC CE / DCI, and one or more SRS resource sets associated with one PUSCH transmission may be indicated among the Y SRS resource sets.

[0704] Of the X SRS resource sets (configured by RRC signaling), Y SRS resource sets may be reported / requested by the UE via UCI / MAC CE. The reporting of the Y SRS resource sets may be triggered by the base station. Alternatively, the reporting of the Y SRS resource sets may be initiated by the UE, such as in a UE-initiated beam report. The base station may transmit / feed back an acknowledgement (ACK) / negative acknowledgement (NACK) in response to the UE's report / request. The Y SRS resource sets may be activated / selected after the UE's report after receiving an ACK from the base station.

[0705] For the selection / activation of Y SRS resource sets by the MAC CE / DCI, signals similar to those used for the selection / activation of [CMR group / TRP / subcell] in Embodiments 1 and 2 may be used. Each SRS resource set may be mapped to each [CMR group / TRP / subcell]. When one [CMR group / TRP / subcell] is selected / activated, the corresponding SRS resource set may be selected / activated. Conversely, when one SRS resource set is selected / activated, the corresponding [CMR group / TRP / subcell] may be selected / activated.

[0706] To indicate the Y SRS resource sets, at least one of [multiple SRS resource set IDs], [bitmap indicating multiple SRS resource sets], and [index of [group / combination of multiple SRS resource sets]] may be indicated according to the above embodiment 1-2. That is, embodiment 1-2 in which [TRP / subcell] is replaced with [SRS resource set / TRP / subcell] and [TRP / subcell group] is replaced with [group / combination of multiple SRS resource sets] / [TRP / subcell group] may be applied to this embodiment.

[0707] Figure 48 is a diagram showing an example of configuring / indicating SRS resource sets according to Option 2. In Figure 48, X SRS resource sets are configured by RRC signaling. Furthermore, four SRS resource sets (SRS resource sets #1 to #4) are selected / activated by MAC CE / DCI, and one SRS resource set (SRS resource set #1) of the four SRS resource sets is selected / indicated by UL scheduling DCI for PUSCH transmission.

[0708] <<Embodiment 3-1>> Regarding the indication of [one or more SRS resource sets (first SRS resource sets)] in the UL scheduling DCI, the first SRS resource set may be indicated from [N SRS resource sets (second SRS resource sets)] in the UL scheduling DCI. The number of the first SRS resource sets may be indicated by the UL scheduling DCI. Furthermore, the number of the first SRS resource sets may be associated with one PUSCH transmission.

[0709] The indication / configuration of the number of first SRS resource sets may be according to at least one of the following options A1 to A3.

[0710] [Option A1] K １ pieces (K １ is an integer from 1 to M, indicating a first SRS resource set; １The first SRS resource sets may be associated with one PUSCH transmission.

[0711] (K １ The maximum possible value of M satisfies M≦N and may be a value set / indicated by RRC signaling / MAC CE / DCI. Alternatively, M may be a value based on UE capability information. Note that the UE capability information may be 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 capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2). Alternatively, M may be the same value as N by default (i.e., M=N).

[0712] [Option A2] The number of first SRS resource sets is M １ Pieces or M ２ In other words, M １ Pieces or M ２ M first SRS resource sets are indicated, １ Pieces or M ２ The first SRS resource sets may be associated with one PUSCH transmission.

[0713] M １ and M ２ may be subject to at least one of the following restrictions: 1≦M １ ≦N·1≦M ２ ≦N・M １ and M ２ is a value defined in the specification, or set / indicated by RRC signaling / MAC CE / DCI, or based on UE capability information. １ and M ２ One of the is 1. By default, M １ and M ２ One of the two is N.

[0714] [Option A3] K ２ pieces (K ２is an integer among a subset of integers from 1 to N), ２ The first SRS resource sets may be associated with one PUSCH transmission.

[0715] K ２ may be subject to at least one of the following restrictions: ２ is 1≦K ２ ≦N. K ２ The possible values ​​of K are defined in the specification, or set / indicated by RRC signaling / MAC CE / DCI, or based on UE capability information. ２ One of the possible values ​​for K is 1. ２ One of the possible values ​​for is N.

[0716] <<Embodiment 3-2>> Regarding the indication of one or more SRS resource sets (first SRS resource sets) in the UL scheduling DCI, the first SRS resource set may be indicated from among N SRS resource sets (second SRS resource sets). This indication may be similar to the indication using the SRS resource set indication field in existing 3GPP releases (e.g., Rel. 17 / 18). That is, each code point in the DCI field may be mapped to one SRS resource set or one combination of multiple SRS resource sets. Multiple combinations of multiple SRS resource sets may be indicated by the UL scheduling DCI. Furthermore, the multiple combinations of multiple SRS resource sets may be associated with one PUSCH transmission.

[0717] If one SRS resource set is indicated (each code point in the DCI field is mapped to one SRS resource set), the indication of the first SRS resource set may follow at least one of options B1 and B2 below.

[0718] [Option B1] All of the N second SRS resource sets may be indicated as the first SRS resource set using the N code points in the DCI field.

[0719] [Option B2] L code points in the DCI field may be used to indicate L SRS resource sets among the N second SRS resource sets as the first SRS resource sets.

[0720] In the above Option B2, which SRS resource set is indicated as the first SRS resource set may be defined in the specifications, or may be configured / indicated by RRC signaling / MAC CE / DCI.

[0721] In the above Option B2, the value of L may be defined in the specifications, may be set / indicated by RRC signaling / MAC CE / DCI, or may be a value based on UE capability information.

[0722] [M ｉ SRS resource sets] are indicated (each code point in the DCI field is [[M ｉ In the case where the first SRS resource set is mapped to one combination of the first SRS resource set and the second SRS resource set, the indication of the first SRS resource set may be according to at least one of options C1 and C2 below.

[0723] [Option C1] DCI field C(N,M ｉ ) code points, ｉ SRS resource sets] (C(N, M ｉ ) combinations of the above items may be indicated.

[0724] [Option C2] DCI field L ｉ Using code points, ｉ SRS resource sets] (C(N, M ｉ ) combinations], [[M ｉ SRS resource sets] ｉ combinations may be indicated.

[0725] In the above option C2, which [[M ｉ The combination of [number of SRS resource sets] may be specified in the specifications, or may be configured / indicated / updated by RRC signaling / MAC CE / DCI.

[0726] In the above option C2, L ｉ The value of may be defined in a specification, may be set / indicated by RRC signaling / MAC CE / DCI, or may be a value based on UE capability information. Note that the UE capability information may be 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 capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2).

[0727] [Variation of Embodiment 3-2] A bitmap may be used to indicate the first SRS resource set in the UL scheduling DCI. The size of the bitmap may be N bits. Each bit in the bitmap represents [one SRS resource set] / [[M ｉ SRS resource sets].

[0728] For example, a bit value corresponding to a particular SRS resource set set to 1 may mean that the particular SRS resource set is indicated / selected / activated, and a bit value corresponding to a particular SRS resource set set to 0 may mean that the particular SRS resource set is not indicated / selected / activated.

[0729] For example, a value of a bit corresponding to a particular SRS resource set set to 0 may mean that the particular SRS resource set is indicated / selected / activated, and a value of a bit corresponding to a particular SRS resource set set to 1 may mean that the particular SRS resource set is not indicated / selected / activated.

[0730] For example, a specific [M ｉ SRS resource sets] ｉ The value of a bit being set to 1 indicates that the value of that particular [M ｉ It may also mean that a particular [M SRS resource set] is indicated / selected / activated. ｉ SRS resource sets] ｉ The value of a bit being set to 0 indicates that the value of that particular [M ｉ This may mean that the SRS resource set is not indicated / selected / activated.

[0731] For example, a specific [M ｉ SRS resource sets] ｉ The value of a bit being set to 0 indicates that the value of that particular [M ｉ It may also mean that a particular [M SRS resource set] is indicated / selected / activated. ｉ SRS resource sets] ｉ The value of a bit being set to 1 indicates that the value of that particular [M ｉ This may mean that the SRS resource set is not indicated / selected / activated.

[0732] For example, [[M ｉ The value of the bit corresponding to a particular combination of [[M SRS resource sets]] is set to 1. ｉ It may also mean that a particular combination of [[M SRS resource sets] is indicated / selected / activated. ｉ The value of the bit corresponding to the particular combination of [[M SRS resource sets]] is set to 0. ｉIt may also mean that a particular combination of [SRS resource sets] is not indicated / selected / activated.

[0733] For example, [[M ｉ The value of the bit corresponding to the particular combination of [[M SRS resource sets]] is set to 0. ｉ It may also mean that a particular combination of [[M SRS resource sets] is indicated / selected / activated. ｉ The value of the bit corresponding to a particular combination of [[M SRS resource sets]] is set to 1. ｉ It may also mean that a particular combination of [SRS resource sets] is not indicated / selected / activated.

[0734] Each bit in the above bitmap is ｉ SRS resource sets], each bit corresponds to one combination of [[M ｉ The correspondence between the [combination of SRS resource sets] may be specified in the specifications, or may be set / indicated / updated by RRC signaling / MAC CE / DCI.

[0735] According to the third embodiment, the SRS resource set can be appropriately configured / instructed.

[0736] <Fourth Embodiment> This embodiment relates to setting / indicating a group of CORESETs (CORESET group, CORESET pool) for a multi-DCI multi-TRP framework.

[0737] X CORESET groups may be configured in RRC signaling.

[0738] The UE may monitor one or more CORESET groups according to at least one of the following options 1 and 2. In the present disclosure, monitoring a CORESET group may be interpreted as monitoring a PDCCH in the CORESET group.

[0739] [Option 1] The UE may monitor all X CORESET groups configured by RRC signaling.

[0740] [Option 2] The UE may monitor Y CORESET groups selected / activated by MAC CE / DCI out of X CORESET groups configured by RRC signaling.

[0741] Of the X CORESET groups (configured by RRC signaling), Y CORESET groups may be reported / requested by the UE via UCI / MAC CE. The reporting of the Y CORESET groups may be triggered by the base station. Alternatively, the reporting of the Y CORESET groups may be initiated by the UE, such as in a UE-initiated beam report. The base station may transmit / feed back an acknowledgement (ACK) / negative acknowledgement (NACK) in response to the UE's report / request. The Y CORESET groups may be activated / selected after the UE's report after receiving an ACK from the base station.

[0742] For the selection / activation of Y CORESET groups by the MAC CE / DCI, signals similar to those used for the selection / activation of [CMR group / TRP / sub-cell / SRS resource set] in embodiments 1, 2, and 3 may be used. Each CORESET group may be one-to-one mapped to each [CMR group / TRP / sub-cell / SRS resource set]. When one [CMR group / TRP / sub-cell / SRS resource set] is selected / activated, the corresponding CORESET group may be selected / activated. Conversely, when one CORESET group is selected / activated, the corresponding [CMR group / TRP / sub-cell / SRS resource set] may be selected / activated.

[0743] One CORESET group may be mapped to multiple [CMR groups / TRPs / subcells / SRS resource sets].

[0744] Multiple CORESET groups may be mapped to one [CMR group / TRP / subcell / SRS resource set].

[0745] To indicate Y CORESET groups, at least one of [IDs of multiple CORESET groups (CORESET group IDs)], [bitmap indicating multiple CORESET groups], and [index of [combination of multiple CORESET groups]] may be indicated according to the above embodiment 1-2. That is, embodiment 1-2 in which [TRP / subcell] is replaced with [CORESET group / TRP / subcell] and [TRP / subcell group] is replaced with [[combination of multiple CORESET groups] / [TRP / subcell group]] may be applied to this embodiment.

[0746] According to the fourth embodiment, in a multi-DCI multi-TRP framework, the UE can appropriately configure / indicate the CORESET group.

[0747] Fifth Embodiment This embodiment relates to setting / indicating the TCI state.

[0748] In the unified TCI framework, a base station may use RRC signaling / MAC CE / DCI to indicate the indicated TCI state, which may apply to multiple DL / UL channels / multiple reference signals (RS).

[0749] X number of indication TCI states may be indicated. Among the X number of indication TCI states, which one or more indication TCI states are applied may be indicated by the MAC CE / DCI for each [SRS resource set / SRS resource / CSI-RS resource set / CSI-RS resource / CORESET / PUCCH resource / PUCCH resource set].

[0750] For example, for the SP-SRS / SP-CSI-RS, the indicated TCI state to be applied to the SP-SRS / SP-CSI-RS may be indicated in the MAC CE for TCI state activation, and for the A-SRS / A-CSI-RS, the indicated TCI state to be applied to the A-SRS / A-CSI-RS may be indicated in the DCI that triggers the A-SRS / A-CSI-RS.

[0751] According to the fifth embodiment, the TCI state can be appropriately set / indicated.

[0752] <Supplementary Information> <<Notification of Information to UE>> In the above-described embodiments, notification of any information 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) may be performed 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.

[0753] 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.

[0754] 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.

[0755] Furthermore, notification of any information to the UE in the above embodiments may be performed periodically, semi-persistently, or aperiodically.

[0756] <<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.

[0757] 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.

[0758] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0759] Furthermore, any information in the above-described embodiments may be notified from the UE periodically, semi-persistently, or aperiodically.

[0760] <<Regarding Application of Each Embodiment>> In a UE / BS, specific (one or more) processes / operations / controls / assumptions / information for at least one of the above-mentioned embodiments may be applied (used) when one or more of the following conditions are met: - a higher layer parameter indicating the specific processes / operations / controls / assumptions / information is configured; - the specific processes / operations / controls / assumptions / information is determined based on related higher layer parameters; - the specific processes / operations / controls / assumptions / information is specified / activated / triggered by a MAC CE / DCI / UCI / resource / channel / RS; - a specific UE capability indicating (or related to) the specific processes / operations / controls / assumptions / information is reported or supported; - the application of the specific processes / operations / controls / assumptions / information is determined based on specific conditions.

[0761] The specific UE capability may indicate at least one of the following: - Support for the specific process / operation / control / assumption / information. - The UE supports cell-free / group-based beam reporting / non-group-based beam reporting. - The UE supports transmission of a single TRP / sub-cell in a cell-free state (single-TRP transmission). - The UE supports joint transmission of multiple TRPs / sub-cells based on a single DCI in a cell-free state (single-DCI-based multi-TRP joint transmission). - The UE supports joint transmission of multiple TRPs / sub-cells based on multiple DCIs in a cell-free state (multi-DCI-based multi-TRP joint transmission). - The number of supported CMRs / CMR groups / joint reporting groups / CMRs per CMR group / CMRs per joint reporting group.

[0762] 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).

[0763] 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)).

[0764] If the above conditions are not met, the UE / BS may follow the behavior specified in existing 3GPP releases.

[0765] (Supplementary Notes) The following inventions are supplementary notes regarding one embodiment of the present disclosure. [Supplementary Note 1] A terminal having: a receiving unit that receives a Medium Access Control Element (MAC CE) indicating multiple Transmission Configuration Indication (TCI) states from one or more transmission / reception points and specific information indicating the one or more transmission / reception points; and a control unit that determines one or more TCI states to be used for transmission / reception based on the MAC CE and the specific information. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein, when the specific information indicates one transmission / reception point, the control unit associates the one transmission / reception point with the multiple TCI states. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the control unit determines the one or more TCI states based on an index indicating a group of multiple transmission / reception points. [Supplementary Note 4] The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein when the specific information indicates the first transmission / reception point and the second transmission / reception point, the control unit associates the first transmission / reception point with a first number of TCI states and associates the second transmission / reception point with a second number of TCI states.

[0766] (Supplementary Notes) The following inventions are supplementary notes regarding one embodiment of the present disclosure. [Supplementary Note 1] A terminal comprising: a receiving unit that receives information indicating multiple channel measurement resource (CMR) groups when group-based beam reporting is configured; and a control unit that controls transmission of multiple joint report groups for the multiple CMR groups, each of the multiple joint report groups indicating multiple CMRs in the multiple CMR groups. [Supplementary Note 2] The terminal described in Supplementary Note 1, wherein the control unit controls reporting of a combination of CMR groups in the multiple CMR groups that applies to all of the multiple joint report groups. [Supplementary Note 3] The terminal described in Supplementary Note 1 or Supplementary Note 2, wherein the control unit controls reporting of a combination of CMR groups in the multiple CMR groups that applies to each of the multiple joint report groups. [Supplementary Note 4] The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein when the number of CMRs in a specific joint reporting group included in the plurality of joint reporting groups is equal to the number of reported CMR groups in the plurality of CMR groups, the controller performs one-to-one mapping between the CMRs in the specific joint reporting group and the reported CMR groups.

[0767] (Supplementary Notes) The following inventions are supplementary notes regarding one embodiment of the present disclosure. [Supplementary Note 1] A terminal comprising: a receiver that receives higher layer signaling for configuring X sounding reference signal (SRS) resource sets and downlink control information (DCI) indicating at least some of the SRS resource sets among the X SRS resource sets; and a controller that controls transmission of a physical uplink shared channel (PUSCH) associated with the at least some SRS resource sets. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein the receiver receives information indicating Y SRS resource sets among the X SRS resource sets, and the at least some SRS resource sets are selected from the Y SRS resource sets. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the controller determines that transmission and reception points corresponding to each of the at least some SRS resource sets are activated. [Supplementary Note 4] The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein a specific code point of the DCI corresponds to one specific SRS resource set or a specific combination of multiple SRS resource sets.

[0768] (Supplementary Notes) The following inventions are supplemented with respect to one embodiment of the present disclosure. [Supplementary Note 1] A terminal having: a receiving unit that receives higher layer signaling that configures X control resource set (CORESET) groups; and a control unit that monitors a physical downlink control channel (PDCCH) in at least some of the X CORESET groups. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein the receiving unit receives information indicating Y CORESET groups out of the X CORESET groups, and the at least some CORESET groups are selected from the Y CORESET groups. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the control unit determines that transmission / reception points corresponding to the at least some CORESET groups are activated. [Supplementary Note 4] The terminal according to any one of Supplementary Notes 1 to 3, wherein the at least some CORESET groups are indicated by a bitmap having X bits.

[0769] (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.

[0770] 49 is a diagram showing 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) specified by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.

[0771] 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.

[0772] 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.

[0773] 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))).

[0774] 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 location, number, shape, size, etc. of each cell and user terminal 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 the base station 10.

[0775] The wireless communication system 1 may utilize multi-input multi-output (MIMO). For example, one cell may be formed by one antenna / base station 10, or may be formed by multiple antennas / base stations 10. One [virtual] cell (which may be called, for example, a supercell) may be composed of multiple [virtual] cells (which may be called, for example, subcells). A supercell may correspond to a cell with a fixed physical range, and a subcell may correspond to a cell with a quasi-static / dynamically variable physical range. In this case, the wireless communication system 1 may be called a cell-free system.

[0776] 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).

[0777] 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.

[0778] 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.

[0779] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 / Xn 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.

[0780] 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.

[0781] 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.

[0782] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0783] 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).

[0784] 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.

[0785] 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.

[0786] 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.

[0787] 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).

[0788] 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.

[0789] 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.

[0790] 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.

[0791] 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.

[0792] 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.

[0793] 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.

[0794] 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.

[0795] 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.

[0796] 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).

[0797] (Base Station) Fig. 50 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

[0798] 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.

[0799] 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.

[0800] 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.

[0801] 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.

[0802] 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.

[0803] 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.

[0804] 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.

[0805] 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.

[0806] 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.

[0807] 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.

[0808] 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.

[0809] 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.

[0810] 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.

[0811] 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.

[0812] 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.

[0813] 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.

[0814] The base station 10 may be separated into three elements: a radio unit (RU), a distributed unit (DU), and a central unit (CU). For example, the RU may implement RF processing (digital beamforming, digital-to-analog conversion, analog beamforming, etc.) and lower-level functions of the physical layer (precoding, IFFT, FFT, etc.). The DU may implement higher-level functions of the physical layer (coding to resource element mapping, etc.), MAC layer functions, and RLC layer functions. The CU may implement the functions of the PDCP layer, Service Data Adaptation Protocol (SDAP) layer, and RRC layer.

[0815] In the present disclosure, the base station 10 may include a single device that realizes all of the functions of the RU, DU, and CU, or may include multiple devices that each realize some of the functions of the RU, DU, and CU and are connected to each other. In the present disclosure, the base station 10 may be interchangeably read as RU / DU / CU.

[0816] The transceiver 120 may transmit a Medium Access Control Element (MAC CE) indicating multiple Transmission Configuration Indication (TCI) states from one or more transmission / reception points and specific information (e.g., TRP / subcell index) indicating the one or more transmission / reception points. The controller 110 may instruct the controller 110 to determine one or more TCI states to be used for transmission / reception based on the MAC CE and the specific information.

[0817] The transceiver 120 may transmit information indicating multiple channel measurement resource (CMR) groups when group-based beam reporting is configured. The controller 110 may control reception of multiple joint report groups for the multiple CMR groups. Each of the multiple joint report groups may indicate multiple CMRs in the multiple CMR groups.

[0818] The transceiver 120 may transmit higher layer signaling for configuring X sounding reference signal (SRS) resource sets and downlink control information (DCI) indicating at least some of the X SRS resource sets. The controller 110 may control reception of a physical uplink shared channel (PUSCH) associated with the at least some SRS resource sets.

[0819] The transceiver 120 may transmit higher layer signaling for configuring X control resource set (CORESET) groups, and the controller 110 may control transmission of a physical downlink control channel (PDCCH) in at least some of the X CORESET groups.

[0820] (User terminal) Fig. 51 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.

[0821] 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.

[0822] 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.

[0823] 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.

[0824] 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.

[0825] 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.

[0826] 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.

[0827] 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.

[0828] 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.

[0829] 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.

[0830] 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.

[0831] 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.

[0832] 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.

[0833] 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.

[0834] 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.

[0835] 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.

[0836] The measurement unit 223 may derive channel measurements for CSI calculation based on the 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 the interference measurement resources. The interference measurement resources may be at least one of an NZP CSI-RS resource for interference measurement, a CSI-Interference Measurement (IM) resource, etc. Note that CSI-IM may be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. Note that in the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeably read as interchangeable.

[0837] 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.

[0838] The transceiver 220 may receive a Medium Access Control Element (MAC CE) indicating multiple Transmission Configuration Indication (TCI) states from one or more transmission / reception points and specific information (e.g., TRP / subcell index) indicating the one or more transmission / reception points. The controller 210 may determine one or more TCI states to use for transmission / reception based on the MAC CE and the specific information.

[0839] If the specific information indicates one transmission / reception point, the controller 210 may associate the one transmission / reception point with the plurality of TCI states.

[0840] The controller 210 may determine the one or more TCI states based on an index indicating a group of a plurality of transmission / reception points (eg, a TRP / subcell group index).

[0841] When the specific information indicates the first transmission / reception point and the second transmission / reception point, the control unit 210 may associate the first transmission / reception point with a first number (e.g., X1) of TCI states, and may associate the second transmission / reception point with a second number (e.g., X2) of TCI states.

[0842] When group-based beam reporting is configured, the transceiver 220 may receive information indicating multiple channel measurement resource (CMR) groups (e.g., CMR group indices). The controller 210 may control transmission of multiple joint report groups for the multiple CMR groups. Each of the multiple joint report groups may indicate multiple CMRs in the multiple CMR groups.

[0843] The controller 210 may control reporting of a combination of CMR groups within the plurality of CMR groups that applies to all of the plurality of joint reporting groups.

[0844] The controller 210 may control reporting of combinations of CMR groups within the plurality of CMR groups that are applied to each of the plurality of joint reporting groups.

[0845] If the number of CMRs in a specific joint reporting group included in the plurality of joint reporting groups is equal to the number of reported CMR groups in the plurality of CMR groups, the controller 210 may perform one-to-one mapping between the CMRs in the specific joint reporting group and the reported CMR groups.

[0846] The transceiver 220 may receive higher layer signaling for configuring X sounding reference signal (SRS) resource sets and downlink control information (DCI) indicating at least some of the X SRS resource sets. The controller 210 may control transmission of a physical uplink shared channel (PUSCH) associated with the at least some SRS resource sets.

[0847] The transceiver 220 may receive information indicating Y SRS resource sets among the X SRS resource sets, and the at least some SRS resource sets may be selected from the Y SRS resource sets.

[0848] The controller 210 may determine that transmission / reception points corresponding to each of the at least some SRS resource sets are activated.

[0849] A particular code point of the DCI may correspond to one particular SRS resource set or a particular combination of multiple SRS resource sets.

[0850] The transceiver 220 may receive higher layer signaling that configures X control resource set (CORESET) groups. The controller 210 may monitor a physical downlink control channel (PDCCH) in at least some of the X CORESET groups.

[0851] The transceiver 220 may receive information indicating Y CORESET groups among the X CORESET groups, and the at least some CORESET groups may be selected from the Y CORESET groups.

[0852] The control unit 210 may determine that transmission / reception points corresponding to each of the at least some CORESET groups are activated.

[0853] The at least some CORESET groups may be indicated by a bitmap having an X bit.

[0854] (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.

[0855] 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.

[0856] 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. Figure 52 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.

[0857] 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.

[0858] 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.

[0859] 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.

[0860] 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.

[0861] 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.

[0862] 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.

[0863] 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.

[0864] 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.

[0865] 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).

[0866] 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.

[0867] 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.

[0868] In addition, the devices included in the core network 30 (for example, network nodes that provide NF) may also be realized by the above-mentioned functional block / hardware configuration.

[0869] (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.

[0870] 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.

[0871] 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.

[0872] 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.

[0873] 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.

[0874] 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.

[0875] 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.

[0876] 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.

[0877] 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.

[0878] 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.

[0879] 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.

[0880] 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.

[0881] 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.

[0882] 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.

[0883] 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.

[0884] 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.

[0885] 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.

[0886] 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.

[0887] 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."

[0888] 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.

[0889] 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.

[0890] 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.

[0891] 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.

[0892] 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.

[0893] 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.

[0894] With respect to any information (e.g., variables, constants, parameters) described in the present disclosure, even if not specifically stated in the above embodiments, any first device (e.g., UE / base station) may notify any second device (e.g., base station / UE) of information indicating / specifying (or relating to) the value of the any information.

[0895] 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 ...

Claims

1. A terminal having: a receiving unit that receives a Medium Access Control Element (MAC CE) that indicates multiple Transmission Configuration Indication (TCI) states from one or more transmission / reception points and specific information that indicates the one or more transmission / reception points; and a control unit that determines one or more TCI states to be used for transmission / reception based on the MAC CE and the specific information.

2. The terminal according to claim 1, wherein, when the specific information indicates one transmission / reception point, the control unit associates the one transmission / reception point with the plurality of TCI states.

3. The terminal according to claim 1, wherein the control unit determines the one or more TCI states based on an index indicating a group of a plurality of transmitting and receiving points.

4. The terminal of claim 1, wherein, when the specific information indicates the first transmission / reception point and the second transmission / reception point, the control unit associates the first transmission / reception point with a first number of TCI states and associates the second transmission / reception point with a second number of TCI states.

5. A wireless communication method for a terminal, comprising the steps of: receiving a Medium Access Control Element (MAC CE) indicating multiple Transmission Configuration Indication (TCI) states from one or more transmission / reception points, and specific information indicating the one or more transmission / reception points; and determining one or more TCI states to be used for transmission / reception based on the MAC CE and the specific information.

6. A base station having: a transmitter that transmits a Medium Access Control Element (MAC CE) that indicates multiple Transmission Configuration Indication (TCI) states from one or more transmission / reception points, and specific information that indicates the one or more transmission / reception points; and a controller that instructs the determination of one or more TCI states to be used for transmission / reception based on the MAC CE and the specific information.

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