Terminals, wireless communication methods, base stations and systems

Abstract

The present invention aims to appropriately control the setting and application of transmission configuration indicator (TCI) states even if a uniform TCI state is supported. This terminal has: a reception unit that receives information pertaining to a TCI state that has been set or activated on the basis of terminal capabilities pertaining to the total number of first TCI states set to one channel or signal and second TCI states set to a plurality of types of channels or signals; and a control unit that controls at least either UL transmission or DL reception on the basis of information pertaining to the TCI states.

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) 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 Rel. 15 / 16 NR, a user terminal (UE) is supported to control transmission and reception processing based on information about quasi-co-location (QCL) (QCL assumptions, Transmission Configuration Indication (TCI) states, and spatial relationships).

[0006] In addition, in future wireless communication systems (e.g., Rel. 17 NR and later), a unified TCI state is being considered that applies the set / activated / indicated TCI state to multiple types of channels / reference signals (RS).

[0007] However, when the unified TCI state is introduced / supported, how to control the TCI state in consideration of the relationship with the TCI state supported in the existing system (e.g., Rel. 15 / 16) (e.g., the setting of the TCI state supported in Rel. 15 / 16 and the unified TCI state) becomes an issue. If the TCI state is not controlled appropriately, it may lead to degradation of communication quality, degradation of throughput, etc.

[0008] Therefore, one of the objectives of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control the setting / application of TCI states even when a unified TCI state is supported.

[0009] A terminal according to one aspect of the present disclosure has a receiving unit that receives information regarding a TCI state that is set or activated based on a terminal capability regarding the total number of a first transmission configuration indicator (TCI) state that is set for one channel or signal and a second TCI state that is set for multiple types of channels or signals, and a control unit that controls at least one of UL transmission and DL reception based on the information regarding the TCI state.

[0010] According to one aspect of the present disclosure, even when a unified TCI state is supported, the setting / application of the TCI state can be appropriately controlled.

[0011] FIG. 1 is a diagram illustrating an example of simultaneous beam updating of multiple CCs. FIGS. 2A and 2B are diagrams illustrating an example of a unified / common TCI framework. FIGS. 3A and 3B are diagrams illustrating an example of a CC-specific TCI state pool and a CC-common TCI state pool. FIGS. 4A and 4B are diagrams illustrating an example of a TCI state in a CC-specific TCI state pool. FIGS. 5A and 5B are diagrams illustrating an example of a TCI state in a CC-common TCI state pool. FIGS. 6A and 6B are diagrams illustrating an example of CC-specific RSs in TCI states. FIGS. 7A and 7B are diagrams illustrating an example of CC-common RSs in TCI states. FIGS. 8A and 8B are diagrams illustrating an example of setting / activating TCI states based on UE capabilities in this embodiment. FIG. 9 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 10 is a diagram illustrating an example of a configuration of a base station according to an embodiment. FIG. 11 is a diagram illustrating an example of a configuration of a user terminal according to an embodiment. FIG. 12 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to an embodiment. FIG. 13 is a diagram illustrating an example of a vehicle according to an embodiment.

[0012] (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).

[0013] 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.

[0014] 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.

[0015] The QCL is an index indicating the statistical properties of signals / channels. For example, if a signal / channel has a QCL relationship with another signal / channel, it may mean that it can be assumed that at least one of a Doppler shift, a Doppler spread, an average delay, a delay spread, and a spatial parameter (e.g., a spatial Rx parameter) is the same between these different signals / channels (i.e., the signals / channels have a QCL with respect to at least one of these).

[0016] 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).

[0017] A plurality of types (QCL types) of QCL may be defined. For example, four QCL types A to D may be provided, each having different parameters (or parameter sets) that can be assumed to be the same. The parameters (which may be referred to as QCL parameters) are as follows: QCL type A (QCL-A): Doppler shift, Doppler spread, mean delay, and delay spread QCL type B (QCL-B): Doppler shift and Doppler spread QCL type C (QCL-C): Doppler shift and mean delay QCL type D (QCL-D): Spatial reception parameters.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0022] 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)).

[0023] 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).

[0024] 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.

[0025] 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.

[0026] (Simultaneous Beam Update of Multiple CCs) In Rel. 16, one MAC CE can update the beam index (TCI state) of multiple CCs.

[0027] The UE can be configured with up to two applicable CC lists (e.g., applicable-CC-list) by RRC. When two applicable CC lists are configured, the two applicable CC lists may correspond to in-band CA in FR1 and in-band CA in FR2, respectively.

[0028] The network may activate and deactivate the configured TCI states of a serving cell or of a set of serving cells configured in simultaneous TCI update list 1 (simultaneousTCI-UpdateList1) or simultaneous TCI update list 2 (simultaneousTCI-UpdateList2) by sending a TCI States Activation / Deactivation for UE-specific PDSCH MAC CE. If the indicated serving cell is configured as part of simultaneous TCI update list 1 or simultaneous TCI update list 2, the MAC CE applies to all serving cells configured in the set of simultaneous TCI update list 1 or simultaneous TCI update list 2.

[0029] The network may indicate the configured TCI states of a serving cell or of a set of serving cells configured in simultaneous TCI-Update List 1 or simultaneous TCI-Update List 2 by sending a TCI States Indication for UE-specific PDCCH MAC CE. If the indicated serving cell is configured as part of simultaneous TCI-Update List 1 or simultaneous TCI-Update List 2, the MAC CE applies to all serving cells configured in the set of simultaneous TCI-Update List 1 or simultaneous TCI-Update List 2.

[0030] The PDCCH TCI state activation MAC CE activates the TCI states associated with the same CORESET ID on all BWP / CCs in the applicable CC list.

[0031] Activation of TCI State for PDSCH The MAC CE activates the TCI state on all BWP / CCs in the applicable CC list.

[0032] A-SRS / SP-SRS Spatial Relationship Activation The MAC CE activates the spatial relationships associated with the same SRS resource ID on all BWPs / CCs in the applicable CC list.

[0033] In the example of Figure 1, the UE is configured with an applicable CC list indicating CCs 0, 1, 2, and 3, and a list indicating 64 TCI states for CORESET or PDSCH of each CC. If one TCI state of CC 0 is activated by a MAC CE, the corresponding TCI state is activated in CCs 1, 2, and 3.

[0034] Such simultaneous beam updating is considered applicable only to the single TRP case.

[0035] For PDSCH, the UE may follow the procedure A. [Procedure A] The UE receives an activation command to map up to eight TCI states to codepoints of the DCI field (TCI field) within one CC / DL BWP or within one set of CCs / BWPs. If one set of TCI state IDs is activated for one set of CCs / DL BWPs, then the applicable list of CCs is determined by the CC indicated in the activation command, and the same set of TCI states applies to all DL BWPs within the indicated CCs. Only if the UE is not provided with different values ​​of the CORESETPoolIndex in the CORESET information element (ControlResourceSet) and is not provided with at least one TCI codepoint that maps to two TCI states, can one set of TCI state IDs be activated for one set of CC / DL BWPs.

[0036] For PDCCH, the UE may follow procedure B. [Procedure B] If the UE is provided with up to two lists of cells for simultaneous TCI state activation by the simultaneous TCI cell list (simultaneousTCI-CellList) via the simultaneous TCI update list (at least one of simultaneousTCI-UpdateList-r16 and simultaneousTCI-UpdateListSecond-r16), the UE shall apply antenna port quasi co-location (QCL) provided by TCI states with the same activated TCI state ID value to CORESET with index p in all configured DL BWPs of all configured cells in one list determined from the serving cell index provided by the MAC CE command. A simultaneous TCI cell list can be provided for simultaneous TCI state activation only if the UE is not provided with multiple different values ​​of the CORESETPoolIndex in the CORESET information element (ControlResourceSet) and is not provided with at least one TCI codepoint that maps to two TCI states.

[0037] For semi-persistent (SP) / aperiodic (AP)-SRS, the UE may follow procedure C. [Procedure C] When spatial relation information (spatialRelationInfo) for SP or AP-SRS resources configured by the SRS resource information element (higher layer parameter SRS-Resource) for one set of CCs / BWPs is activated / updated by MAC CE, where the applicable list of CCs is indicated by the simultaneous spatial update list (higher layer parameter simultaneousSpatial-UpdateList-r16 or simultaneousSpatial-UpdateListSecond-r16), the spatial relation information is applied to SP or AP-SRS resources with the same SRS resource ID in all BWPs within the indicated CC. The spatial relation information (spatialRelationInfo) for the SP or AP-SRS resources configured by the SRS resource information element (higher layer parameter SRS-Resource) for one set of CCs / BWPs is activated / updated by the MAC CE only if the UE is not provided with different values ​​of the CORESETPoolIndex in the CORESET information element (ControlResourceSet) and is not provided with at least one TCI codepoint that maps to two TCI states.

[0038] The simultaneous TCI cell list (simultaneousTCI-CellList) and the simultaneous TCI update list (at least one of simultaneousTCI-UpdateList1-r16 and simultaneousTCI-UpdateList2-r16) are lists of serving cells whose TCI relationships can be updated simultaneously using MAC CE. simultaneousTCI-UpdateList1-r16 and simultaneousTCI-UpdateList2-r16 do not include the same serving cell.

[0039] The simultaneous spatial update list (at least one of the upper layer parameters simultaneousSpatial-UpdatedList1-r16 and simultaneousSpatial-UpdatedList2-r16) is a list of serving cells whose spatial relationships can be updated simultaneously using MAC CE. simultaneousSpatial-UpdatedList1-r16 and simultaneousSpatial-UpdatedList2-r16 do not include the same serving cell.

[0040] Here, the simultaneous TCI update list and the simultaneous spatial update list are configured by the RRC, the CORESET pool index of the CORESET is configured by the RRC, and the TCI code point mapped to the TCI state is indicated by the MAC CE.

[0041] In the present disclosure, CC list, new CC list, simultaneous TCI cell list, simultaneousTCI-CellList, simultaneous TCI update list, simultaneousTCI-UpdateList1-r16, simultaneousTCI-UpdateList2-r16, simultaneous spatial update list, simultaneousSpatial-UpdatedList1-r16, simultaneousSpatial-UpdatedList2-r16 may be read as interchangeable.

[0042] In the present disclosure, simultaneousTCI-UpdateList1, simultaneousTCI-UpdateList1-r16, and simultaneousTCI-UpdateList-r16 may be interchangeable. In the present disclosure, simultaneousTCI-UpdateList2, simultaneousTCI-UpdateList2-r16, and simultaneousTCI-UpdateListSecond-r16 may be interchangeable.

[0043] In the present disclosure, simultaneousSpatial-UpdatedList1, simultaneousSpatial-UpdatedList1-r16, and simultaneousSpatial-UpdateList-r16 may be interchangeable. In the present disclosure, simultaneousSpatial-UpdatedList2, simultaneousSpatial-UpdatedList2-r16, and simultaneousSpatial-UpdateListSecond-r16 may be interchangeable.

[0044] (Unified / Common TCI Framework) The unified TCI framework allows UL and DL channels to be controlled by a common framework. Instead of specifying TCI states or spatial relationships for each channel as in Rel. 15, the unified TCI framework may specify a common beam (common TCI state) and apply it to all UL and DL channels, or a common beam for UL may apply to all UL channels and a common beam for DL ​​may apply to all DL channels.

[0045] 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.

[0046] 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).

[0047] 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).

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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).

[0053] 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).

[0054] 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).

[0055] 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).

[0056] 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.

[0057] It is being considered that N=M=1 will be supported in Rel. 17. It is being considered that other cases will be supported in Rel. 18 and later.

[0058] In the example of Figure 2A, an RRC parameter (information element) configures multiple TCI states for both DL and UL. A MAC CE may activate multiple TCI states from the configured multiple TCI states. A DCI may indicate one of the activated multiple TCI states. The DCI may be a UL / DL DCI. The indicated TCI state may apply to at least one (or all) of the UL / DL channels / RS. One DCI may indicate both UL TCI and DL TCI.

[0059] In the example of this figure, a point may be one TCI state that applies to both UL and DL, or two TCI states that apply to UL and DL respectively.

[0060] 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).

[0061] 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."

[0062] In the example of Figure 2B, the 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) from the configured multiple TCI states. Separate active TCI pools for each of the UL and DL may be configured / activated.

[0063] 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.

[0064] The beam instruction DCI for the unified / common TCI state may be DCI format 1_1 / 1_2 with DL assignment (scheduling).

[0065] The beam instruction DCI for the unified / common TCI state may be DCI format 1_1 / 1_2 without DL assignment (scheduling) or a new DCI format, which is useful when there is no DL data but there is beam instruction for the unified / common TCI state.

[0066] (Unified TCI State Pool in CA) In the unified TCI framework of Rel. 17, the following assumptions 1-1 to 1-4 are considered for updating and activating a common TCI state ID to provide at least one of common QCL information for UE-dedicated PDCCH / PDSCH and common UL TX spatial filter for UE-dedicated PUSCH / PUCCH across multiple CC / multiple BWP sets.

[0067] [Assumption 1-1] The RRC-configured TCI state pool may be configured in the PDSCH configuration (PDSCH-Config) for each BWP / CC, as in Rel. 15 / 16. Such an RRC-configured TCI state pool configuration does not imply that separate DL / UL TCI state pools are excluded or supported.

[0068] [Assumption 1-2] The RRC-configured TCI state pool does not have to be in the PDSCH configuration (PDSCH-Config) for each BWP / CC, and may be replaced by a reference to the RRC-configured TCI state pool in the reference BWP / CC. The RRC-configured TCI state pool is configured in the PDSCH configuration (PDSCH-Config) of the reference BWP / CC. For a BWP / CC whose PDSCH configuration includes a reference to the RRC-configured TCI state pool in the reference BWP / CC, the UE applies the RRC-configured TCI state pool in the reference BWP / CC.

[0069] [Assumptions 1-3] If there is no BWP / CC ID (bwp-Id / cell) for a source RS of QCL type A / D in the QCL information (QCL-Info) of the TCI state, the UE assumes that the source 1-RS of QCL type A / D is in the BWP / CC to which the TCI state applies.

[0070] [Assumptions 1-4] A UE capability is introduced to report the maximum number of TCI state pools it supports across multiple BWPs and multiple CCs in a band, and the candidate values ​​include at least one.

[0071] In the unified TCI framework of Rel. 17, the following assumptions 2-1 to 2-3 are considered for updating and activating a common TCI state ID to provide at least one of common QCL information for UE-dedicated PDCCH / PDSCH and common UL TX spatial filter for UE-dedicated PUSCH / PUCCH across multiple CC / multiple BWP sets.

[0072] [Assumption 2-1] For the target CC, the source RS determined from the indicated common TCI state ID to provide a QCL type D indication and determine the UL TX spatial filter may be configured within the target CC or another CC.

[0073] [Assumption 2-2] For intra-band CA, the following configurations 1 to 2 may be supported without additional QCL rules. [Configuration 1] One source RS across multiple CCs may be determined from a common TCI state ID indicated to provide a QCL Type D indication and determine a UL TX spatial filter for the set of configured CCs. [Configuration 2] One source RS per CC may be determined from a common TCI state ID indicated to provide a QCL Type D indication and determine a UL TX spatial filter for the set of configured CCs. Multiple CC-specific source RSs may be associated with the same QCL Type D RS.

[0074] [Assumption 2-3] The set of configured CC / BWPs includes all BWPs in the configured CC.

[0075] In CA, CC-specific TCI state pools / configurations (Case 1) and CC-common TCI state pools / configurations (Case 2) may be supported.

[0076] [Case 1] Figure 3A shows an example of a CC-specific TCI state pool. In this example, a TCI state list in the PDSCH configuration is configured for BWP1 in CC1, and a TCI state list in the PDSCH configuration is configured for BWP1 in CC2. One MAC CE / DCI indicates the TCI state ID.

[0077] [Case 2] Figure 3B shows an example of a CC-common TCI state pool. In this example, the TCI state list in the PDSCH configuration is configured for BWP1 in CC1, and the TCI state list in the PDSCH configuration is absent for BWP1 in CC2. One MAC CE / DCI indicates a TCI state ID (e.g., TCI state #2).

[0078] One TCI state information element (TCI-State) in the TCI state pool may include a TCI state ID, a QCL type 1 (QCL information, QCL-Info), and a QCL type 2 (QCL information, QCL-Info).

[0079] [Case 1] Figure 4A shows an example in which a TCI status in a CC-specific TCI status pool indicates a CC-specific QCL type D RS. QCL type 1 does not include a cell ID or BWP ID, but includes a reference signal (referenceSignal=NZP-CSI-RS#5) and a QCL type (qcl-Type=typeA). QCL type 2 does not include a cell ID or BWP ID, but includes a reference signal (referenceSignal=NZP-CSI-RS#5) and a QCL type (qcl-Type=typeD).

[0080] 4B shows an example in which a TCI state in a CC-specific TCI state pool indicates a CC-common QCL Type D RS. QCL Type 1 does not include a cell ID or BWP ID, but includes a reference signal (referenceSignal=NZP-CSI-RS#5) and a QCL type (qcl-Type=typeA). QCL Type 2 includes a cell ID (cell=#1), a BWP ID (bwp-Id=#1), a reference signal (referenceSignal=NZP-CSI-RS#5), and a QCL type (qcl-Type=typeD).

[0081] [Case 2] Figure 5A shows an example in which the TCI status in the CC-common TCI status pool indicates a CC-specific QCL type D RS. QCL type 1 does not include a cell ID or BWP ID, but includes a reference signal (referenceSignal=NZP-CSI-RS#5) and a QCL type (qcl-Type=typeA). QCL type 2 does not include a cell ID or BWP ID, but includes a reference signal (referenceSignal=NZP-CSI-RS#5) and a QCL type (qcl-Type=typeD).

[0082] 5B shows an example in which a TCI state in the CC-common TCI state pool indicates a CC-common QCL Type D RS. QCL Type 1 does not include a cell ID or BWP ID, but includes a reference signal (referenceSignal=NZP-CSI-RS#5) and a QCL type (qcl-Type=typeA). QCL Type 2 includes a cell ID (cell=#1), a BWP ID (bwp-Id=#1), a reference signal (referenceSignal=NZP-CSI-RS#5), and a QCL type (qcl-Type=typeD).

[0083] In both cases 1 and 2, the TCI state may indicate CC-specific (BWP / CC-specific) RS (eg, QCL Type A RS) on each BWP / CC.

[0084] [Case 1] Figure 6A shows an example where TCI states in a CC-specific TCI state pool indicate CC-specific RSs. The TCI state set for BWP1 in CC1 indicates the CC-specific RS for BWP1 in CC1. The TCI state set for BWP1 in CC2 indicates the CC-specific RS for BWP1 in CC2.

[0085] [Case 2] Figure 6B shows an example where a TCI state in the CC common TCI state pool indicates a CC-specific RS. The TCI state configured for BWP1 in CC1 indicates (the same RS ID of) the CC-specific RS for BWP1 in CC1 and the CC-specific RS for BWP1 in CC2. The TCI state configured for BWP1 in CC1 may not include a BWP / CC ID.

[0086] In both cases 1 and 2, the TCI state may indicate CC-common (BWP / CC-common) RS (eg, QCL Type D RS of CSI-RS with repetition) on each BWP / CC.

[0087] Case 1: Figure 7A shows an example where TCI states in a CC-specific TCI state pool indicate CC-common RSs: the TCI state set for BWP1 in CC1 indicates a CC-common RS for BWP1 in CC1, and the TCI state set for BWP1 in CC2 indicates the (same) CC-common RS for BWP1 in CC2.

[0088] [Case 2] Figure 7B shows an example where the TCI state in the CC-common TCI state pool indicates a CC-common RS: The TCI state set for BWP1 in CC1 indicates a CC-common RS for all CCs / BWPs.

[0089] In the present disclosure, the TCI state may include QCL Type A RS / QCL Type D RS, or may include QCL Type A RS for frequency range (FR) 1, or may include QCL Type A RS / QCL Type D RS for FR2.

[0090] (Multi-TRP PDSCH) In NR, one or more transmission / reception points (Transmission / Reception Points (TRPs)) (multi-TRPs (MTRPs)) 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 using one or more panels.

[0091] Note that multiple TRPs may correspond to the same cell identifier (cell identifier (ID)) or different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0092] Multi-TRPs (e.g., TRPs #1 and #2) may be connected by ideal / non-ideal backhauls to exchange information, data, etc. Each TRP of a multi-TRP may transmit a different code word (CW) and a different layer. Non-Coherent Joint Transmission (NCJT) may be used as a form of multi-TRP transmission.

[0093] In the NCJT, for example, TRP#1 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, and TRP#2 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.

[0094] 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.

[0095] 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).

[0096] Multiple PDSCHs from multiple TRPs (which may be referred to as multiple PDSCHs) may be scheduled using one DCI (single DCI, single PDCCH) (single-master mode, single-DCI based multi-TRP). Multiple PDSCHs from multiple TRPs may be scheduled using multiple DCIs (multiple DCI, multiple PDCCHs) (multi-master mode, multi-DCI based multi-TRP).

[0097] In Ultra-Reliable and Low Latency Communications (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, reliability enhancement schemes, e.g., schemes 1a, 2a, 2b, 3, and 4) across multi-TRP in the frequency domain, layer (spatial) domain, or time domain are considered to be supported. In scheme 1a, 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.

[0098] Such a multi-TRP scenario allows for more flexible transmission control using good quality channels.

[0099] In order to support multi-TRP transmission within a cell (with the same cell ID) and between cells (with different cell IDs) based on multiple PDCCHs, in the RRC configuration information for linking multiple pairs of PDCCHs and PDSCHs with multiple TRPs, one control resource set (CORESET) in the PDCCH configuration information (PDCCH-Config) may correspond to one TRP.

[0100] If at least one of the following conditions 1 and 2 is satisfied, the UE may determine that the transmission is a multi-TRP transmission based on the multi-DCI. In this case, the TRP may be replaced with the CORESET pool index. [Condition 1] A CORESET pool index of 1 is set. [Condition 2] Two different values ​​of the CORESET pool index (e.g., 0 and 1) are set.

[0101] If the following condition is met, the UE may determine that it is a multi-TRP based on a single DCI. In this case, two TRPs may be interpreted as two TCI states indicated by the MAC CE / DCI. [Condition] "Enhanced TCI States Activation / Deactivation for UE-specific PDSCH MAC CE" is used to indicate one or two TCI states for one codepoint in the TCI field in the DCI.

[0102] The DCI for common beam instruction may be a UE-specific DCI format (e.g., DL DCI format (e.g., 1_1, 1_2), UL DCI format (e.g., 0_1, 0_2)), or may be a UE-group common DCI format.

[0103] (Unified TCI Framework in Carrier Aggregation (CA)) In NR Rel. 17 and later, the introduction of a unified TCI state framework in CA is being considered. The common TCI state indicated to the UE is expected to be common between CCs (cells) (at least between CCs, QCL type D). This is because the existing specifications (Rel. 15 / 16) do not support simultaneous reception of different DL channels / RSs with QCL type D and simultaneous transmission of UL channels / RSs with different spatial relationships, except for cases such as transmission and reception using multiple TRPs.

[0104] Also, in the unified TCI framework, common TCI state ID update / activation is considered to provide common QCL information / common UL transmit spatial filter across a set of configured CCs.

[0105] The following options 1 and 2 are being considered for the TCI state pool for CA.

[0106] [Option 1] A single TCI state pool configured by the RRC for a set of configured multiple CCs (cells) / BWPs may be shared (configured). For example, a cell group TCI state may be defined, or the TCI state pool for PDSCH in the reference cell may be reused. In the TCI state, there is no CC (cell) ID for the QCL type A RS, and the CC (cell) ID for the QCL type A RS may be determined according to the target CC (cell) of the TCI state.

[0107] In Option 1, a common TCI state pool is configured for each of multiple CCs / BWPs, so that when one common TCI state is indicated in the MAC CE / DCI, the indicated common TCI state may be applied to all CCs / BWPs (all CCs / BWPs included in the pre-configured CC / BWP list).

[0108] [Option 2] A TCI state pool may be configured by the RRC for each individual CC.

[0109] In Option 2, similar to Rel. 16, a list of CCs / BWPs to which simultaneous beam updates are applied is pre-configured by the RRC, and if a beam update is performed in the MAC CE / DCI for any CC / BWP included in the CC / BWP list, the update may be applied to all CCs / BWPs.

[0110] In option 1, a common TCI state pool is configured (shared) by RRC for multiple CCs, the TCI states in the common TCI state pool are indicated by a common TCI state ID, and one RS determined based on that TCI state is used to indicate QCL type D across the set of multiple configured CCs (Constraint 1).

[0111] In option 2, a separate common TCI state pool is configured by the RRC for each CC, the TCI states in the common state pool are indicated by a common TCI state ID, and one RS determined based on the TCI state is used to indicate QCL type D across the set of multiple configured CCs / (Constraint 2).

[0112] (TCI states of Rel. 15 / 16 / unified TCI states of Rel. 17 and later) In future NRs, it is also desirable to reduce the processing load on the UE due to switching operations between the unified TCI states introduced / supported in Rel. 17 and the TCI states (e.g., DL) / spatial relationships (e.g., UL) specified in Rel. 15 / 16. From this perspective, it is possible that either one of the TCI states / spatial relationships of Rel. 15 / 16 or the unified TCI states of Rel. 17 is set / applied. Alternatively, it is possible that the setting / activation of either TCI state (or the number of TCI states set / activated for either TCI state) is limited.

[0113] Although it is assumed that beams (e.g., QCL Type D RSs in TCI states) will be common (e.g., SSBs common between CCs) for each CC in the same band, cases may be considered in which the TCI state / spatial relationship for Rel. 15 and the TCI state for Rel. 17 are configured on different CCs. In this case, it may be possible to clarify the TCI state / spatial relationship for Rel. 15 / 16 and the TCI state for Rel. 17, or to configure only either the TCI state / spatial relationship for Rel. 15 / 16 or the TCI state for Rel. 17 in the same band.

[0114] Furthermore, taking into consideration the UE load, it is also possible to configure the UE so that only either the Rel. 15 / 16 TCI state / spatial relationship or the Rel. 17 TCI state is applied / configured in all bands. For example, if the unified TCI state (or the Rel. 17 TCI state) is configured in any CC (or cell) in any band, the UE may not expect / assume that the Rel. 15 / 16 TCI state / spatial relationship is configured. However, if the UE does not support the unified TCI state in only one band, how to control the TCI state configuration becomes an issue.

[0115] Furthermore, in Rel. 17 and later, when performing multi-TRP (MIMO), multi-PDSCH / multi-PUSCH, etc., it is also assumed that transmission / reception will be controlled using the TCI state / spatial relationship of Rel. 15 / 16. For example, in the case of multi-PDSCH / multi-PUSCH, multiple PDSCHs / PUSCHs are scheduled in different slots using one DCI, and beam instructions for each PDSCH / PUSCH (e.g., instructions on the TCI state / QCL assumption / spatial relationship) are made based on the TCI state / spatial relationship supported in Rel. 15 / 16.

[0116] In such a case, when these transmission / reception controls (e.g., multi-PDSCH / multi-PUSCH) are configured / applied in one CC, there is a risk that the unified TCI state cannot be configured / activated / applied in other CCs (or all CCs) in the band. Therefore, it is desirable that the configuration of the TCI state / spatial relationship in Rel. 15 / 16 or the unified TCI state in Rel. 17 (e.g., restriction of either one) be performed per band (or per band) and per cell / CC (or per cell / band).

[0117] On the other hand, if the TCI state / spatial relationship of Rel. 15 / 16 and the unified TCI state of Rel. 17 (e.g., limiting one of them) are configured for each band / cell, the processing load on the UE may increase due to an increase in the number of TCI states / unified TCI states configured for each band / CC.

[0118] The present inventors focused on cases where the Rel. 15 / 16 TCI states / spatial relationships and the Rel. 17 unified TCI states are configured / activated on a band-by-band / CC (or cell-by-cell) basis, and studied a configuration that can suppress an increase in the UE processing load in such cases, leading to the concept of this embodiment. In one aspect of this embodiment, UE capabilities (e.g., UE capability) related to the total number (or total number) of Rel. 15 / 16 TCI states / spatial relationships and Rel. 17 unified TCI states that can be configured / activated are specified, and the configuration / application / activation of TCI states is controlled based on the UE capabilities.

[0119] Hereinafter, embodiments of 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.

[0120] 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."

[0121] In the present disclosure, terms such as 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.

[0122] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, 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.

[0123] 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.

[0124] 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.

[0125] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0126] In the present disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In the present disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0127] In the present disclosure, the terms 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 (CDM) 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, etc. may be read as interchangeable.

[0128] In the present disclosure, the terms common beam, common TCI, common TCI state, Rel. 17 TCI state, Rel. 17 or later TCI state, unified TCI, unified TCI state, TCI state applicable to multiple types of channels / RS, TCI state applied to multiple (multiple types) of channels / RS, TCI state applicable to multiple types of channels / RS, TCI state for multiple types of signals, TCI state for multiple types of channels / RS, TCI state, unified TCI state, UL and DL TCI state for joint TCI indication, UL-only TCI state for separate TCI indication, DL-only TCI state for separate TCI indication, joint TCI state for DL ​​and UL, and separate TCI state for each of DL and UL may be interpreted as interchangeable.

[0129] In the present disclosure, the terms TCI states of Rel. 15 / 16, TCI states / spatial relationships that apply only to specific channels / RSs, and TCI states / spatial relationships that apply to one type of channel / RS may be interpreted interchangeably.

[0130] In the present disclosure, the terms multiple TCI states configured by an RRC IE, multiple TCI states activated by a MAC CE, information regarding one or more TCI states, TCI state configuration, TCI state pool, active TCI state pool, common TCI state pool, unified TCI state pool, TCI state list, unified TCI state list, joint TCI state pool, separate TCI state pool, separate DL / UL TCI state pool, DL TCI state pool, UL TCI state pool, separate DL TCI state pool, and separate UL TCI state pool may be read as interchangeable.

[0131] In the present disclosure, DL TCI, DL only TCI, separate DL only TCI, DL common TCI, DL unified TCI, common TCI, and unified TCI may be interchangeable. In the present disclosure, UL TCI, UL only TCI, separate UL only TCI, UL common TCI, UL unified TCI, common TCI, and unified TCI may be interchangeable.

[0132] In the present disclosure, the channels / RS to which the unified TCI state applies may be PDSCH / PDCCH / CSI-RS / PUSCH / PUCCH / SRS.

[0133] In the present disclosure, BWP, CC (cell), and CC (cell) / BWP may be read interchangeably.

[0134] (Wireless Communication Method) In this embodiment, a case will be described in which UE capabilities (e.g., UE capability) related to the total number of TCI states / spatial relationships supported in Rel. 15 / 16 and TCI states (e.g., unified TCI states) introduced / supported in Rel. 17 and later will be specified.

[0135] A TCI state supported in Rel. 15 / 16 may correspond to (or be configured / applied / activated for) one channel / signal. A TCI state introduced / supported in Rel. 17 and later (e.g., a unified TCI state) may correspond to (or be configured / applied / activated for) multiple types of channels / signals. In the following description, a TCI state supported in Rel. 15 / 16 may also be referred to as a "Rel. 15 / 16 TCI state" or a "first TCI state," and a TCI state introduced / supported in Rel. 17 and later may also be referred to as a "unified TCI state" or a "second TCI state."

[0136] When a UE capability regarding the total number of first TCI states (or Rel. 15 / 16 TCI states) and second TCI states (or unified TCI states) is specified, the UE may assume that the first TCI states and second TCI states will only be set / activated to the extent that the total number is satisfied. The term "assume" may be read as "expect," "judge," or "decide."

[0137] The network (or base station) may notify the UE of information (e.g., configuration information) regarding the first TCI state and the second TCI state to be configured / activated for each predetermined unit based on the UE capability regarding the total number of the first TCI state and the second TCI state (see FIG. 8A). Alternatively, the UE may report the UE capability information to the network in advance (see FIG. 8B). The network may configure the UE capability information in the UE using higher layer parameters or the like based on the UE capability information reported from the UE (or without reporting the UE capability information).

[0138] The total number of the first TCI state and the second TCI state may be the total number of the first TCI state and the second TCI state that can be set in a predetermined unit. The setting of the TCI state may be set by a higher layer parameter (e.g., RRC). The network uses the higher layer parameter to control the setting / notification of the first TCI state and the second TCI state in each predetermined unit so as not to exceed (be equal to or less than) the total number corresponding to the UE capability.

[0139] Alternatively, the total number of the first TCI states and the second TCI states may be the total number of the first TCI states and the second TCI states that can be activated in a predetermined unit. The setting of the TCI states may be activated by a MAC CE (or a MAC CE+DCI). The network controls the activation of the first TCI states and the second TCI states in a predetermined unit using the MAC CE (or a MAC CE+DCI) so that the total number does not exceed (is equal to or less than) the total number corresponding to the UE capabilities. Note that activation may be interpreted as enabling, deactivating, invalidating, or disabling.

[0140] The predetermined unit for considering the total number of the first TCI state and the second TCI state may be at least one of a bandwidth portion (e.g., BWP), a CC (or cell), a band, a frequency range (e.g., FR), and a UE.

[0141] For example, the total number of first TCI states and second TCI states supported / allowed for each CC may be specified. Also, the UE may report its UE capability regarding the total number of first TCI states and second TCI states that can be supported for each CC. The total number of first TCI states and second TCI states that can be supported by the UE may be specified / reported separately for each CC or may be specified / reported commonly for multiple CCs.

[0142] As another example, the total number of first TCI states and second TCI states supported / allowed for each band (e.g., configurations supported / allowed across all BWPs and all CCs in the band) may be specified. Also, the UE may report its UE capability regarding the total number of first TCI states and second TCI states that can be supported for each band. The total number of first TCI states and second TCI states that can be supported by the UE may be specified / reported separately for each band, or may be specified / reported commonly for multiple bands.

[0143] The UE may report UE capability information regarding both the total number of first and second TCI states per CC and the total number of first and second TCI states per band.

[0144] A bandwidth portion (e.g., BWP) may be configured by a higher layer parameter. A CC (or cell) may be configured by a higher layer parameter or may be predefined in a specification. One CC may include one or more BWPs.

[0145] A band may be predefined in a specification or may be set by a higher layer parameter. One or more CCs (or BWPs) may be included in the range of one band. A frequency range may be predefined in a specification or may be set by a higher layer parameter. One or more bands (or CCs / BWPs) may be included in one frequency range.

[0146] For example, if the total number of first TCI states and second TCI states is specified / reported per band, the total number of first TCI states and second TCI states supported / allowed across one or more CCs (or one or more CCs and one or more BWPs) included in the band may be indicated.

[0147] In the present disclosure, the number of second TCI states may be the number of TCI state pools (e.g., TCI state pools) divided by the number of TCI state lists (e.g., TCI state lists). The number of second TCI states may be the number of joint TCI states or the number of separate TCI states, or may be the sum of the number of joint TCI states or the number of separate TCI states.

[0148] Assume that only one of the first TCI state and the second TCI state is configured / activated (or the configuration / activation of either one is limited) per CC. In such a case, the UE capability of the total number of the first TCI state and the second TCI state may be specified / reported per band / per all bands. The network / base station may control the configuration / activation of either the first TCI state or the second TCI state per CC within a band / all bands so as not to exceed the total number.

[0149] Assume that only one of the first TCI state and the second TCI state is configured / activated (or the configuration / activation of either one is limited) per band. In this case, the UE capability of the total number of the first TCI state and the second TCI state may be specified / reported per all bands. The network / base station may control the configuration / activation of either the first TCI state or the second TCI state per band so that the total number is not exceeded within all bands.

[0150] In this way, even if the setting / activation of only one of the first TCI state and the second TCI state (or the restriction of the setting / activation of one of them) is performed on a CC / band basis, by specifying the total number of first TCI states and second TCI states that can be set / activated, it is possible to prevent an increase in the processing load on the UE (e.g., memory consumption of the UE, etc.).

[0151] In addition to the UE capability regarding the total number of first TCI states and second TCI states, the UE may also report at least one of the maximum number (or total number) of first TCI states that can be set / activated in a given unit and the maximum number (or total number) of second TCI states that can be set / activated in a given unit.

[0152] The base station may determine the TCI states to be set / activated for each unit (e.g., CC / band) based on the maximum number of first TCI states / maximum number of second TCI states in a predetermined unit and the total number of first TCI states+second TCI states. In this way, by taking into consideration the maximum number of first TCI states / second TCI states and the total number of first TCI states and second TCI states, it becomes possible to appropriately set / activate the first TCI states and the second TCI states.

[0153] (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.

[0154] 9 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0155] 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.

[0156] 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.

[0157] 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))).

[0158] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The locations and numbers of the cells and user terminals 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.

[0159] 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).

[0160] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, 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.

[0161] 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.

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

[0163] 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.

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

[0165] 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).

[0166] 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.

[0167] 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.

[0168] 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.

[0169] 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).

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

[0171] Note that the DCI for scheduling 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.

[0172] 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.

[0173] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the 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.

[0174] 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.

[0175] 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.

[0176] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0177] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including 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.

[0178] 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).

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

[0180] 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.

[0181] 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.

[0182] 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.

[0183] 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.

[0184] 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.

[0185] 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.

[0186] 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.

[0187] 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.

[0188] 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.

[0189] 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.

[0190] 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.

[0191] 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.

[0192] 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.

[0193] 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.

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

[0195] 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.

[0196] The transceiver unit 120 may transmit information regarding the TCI states to be set or activated based on the terminal capabilities regarding the total number of first transmission configuration indicator (TCI) states set for one channel or signal and second TCI states set for multiple types of channels or signals.

[0197] The control unit 110 may control at least one of UL transmission and DL reception based on information about the TCI state.

[0198] (User Terminal) Fig. 11 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.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] 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.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] 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.

[0210] 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.

[0211] 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.

[0212] 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.

[0213] 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.

[0214] 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.

[0215] The transceiver unit 220 may receive information about a transmission configuration indicator (TCI) state to be set or activated based on a terminal capability regarding a total number of first TCI states set for one channel or signal and second TCI states set for multiple types of channels or signals. The transceiver unit 220 may report the terminal capability regarding the total number of first TCI states and second TCI states.

[0216] The control unit 210 may control at least one of UL transmission and DL reception based on information about the TCI state.

[0217] The total number of first TCI states and second TCI states may be the total number of first TCI states and second TCI states that are configurable (e.g., simultaneously configurable) for at least one of each of per partial bandwidth, per cell, per band, per frequency range, and per terminal.

[0218] The total number of first TCI states and second TCI states may be the total number of first TCI states and second TCI states that can be activated (e.g., simultaneously activated) in at least one of per partial bandwidth, per cell, per band, per frequency range, and per terminal.

[0219] (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.

[0220] 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.

[0221] For example, a base station, a user terminal, or the like according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 12 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, and the like.

[0222] 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.

[0223] 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.

[0224] 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.

[0225] 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.

[0226] 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.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] 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).

[0231] 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.

[0232] 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.

[0233] (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.

[0234] 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.

[0235] 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.

[0236] 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.

[0237] 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.

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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.

[0243] 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.

[0244] 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.

[0245] 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.

[0246] 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.

[0247] 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.

[0248] 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.

[0249] 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.

[0250] 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.

[0251] 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."

[0252] 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.

[0253] 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.

[0254] 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.

[0255] 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.

[0256] 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.

[0257] 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.

[0258] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0259] Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0260] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0261] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0262] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0263] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), these wired and / or wireless technologies are included within the definition of transmission media.

[0264] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0265] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," etc. may be used interchangeably.

[0266] In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0267] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0268] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0269] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0270] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

[0271] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0272] The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0273] 13 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0274] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0275] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0276] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0277] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0278] The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0279] The driving assistance system unit 64 includes various devices for providing functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0280] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 to and from the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, which are provided in the vehicle 40.

[0281] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Furthermore, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (or may function as at least one of the base station 10 and the user terminal 20).

[0282] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0283] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0284] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0285] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as an uplink channel and a downlink channel may be read as a sidelink channel.

[0286] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0287] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0288] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0289] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802. The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0290] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0291] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0292] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, etc.

[0293] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0294] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "deciding" some action.

[0295] Furthermore, "judgment (decision)" may be read as "assuming," "expecting," "considering," or the like.

[0296] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0297] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0298] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0299] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0300] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0301] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0302] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and explanatory and does not impose any limiting meaning on the invention according to the present disclosure.

[0303] This application is based on Japanese Patent Application No. 2021-187357, filed on November 17, 2021, the contents of which are incorporated herein in their entirety.

Claims

1. A receiving unit that receives information about TCI states that are set or activated based on the terminal capability relating to the total number of first transmit configuration index (TCI) states set for one channel or signal and second TCI states set for multiple types of channels or signals, The system includes a control unit that controls at least one of UL transmission and DL reception based on the information regarding the TCI state, The total number of the first TCI states and the second TCI states is the total number of the first TCI states and the second TCI states that can be set or activated in at least one of the following: per partial bandwidth, per cell, per band, per frequency range, and per terminal, in a terminal.

2. The terminal according to claim 1, further comprising a transmitting unit that reports terminal capabilities relating to the total number of the first TCI states and the second TCI states.

3. A step of receiving information about TCI states that are set or activated based on the terminal capability relating to the total number of first transmit configuration index (TCI) states set for one channel or signal and second TCI states set for multiple types of channels or signals, The process includes controlling at least one of UL transmission and DL reception based on the information regarding the TCI state, A wireless communication method for a terminal, wherein the total number of the first TCI states and the second TCI states is the total number of the first TCI states and the second TCI states that can be set or activated in at least one of the following: per partial bandwidth, per cell, per band, per frequency range, and per terminal.

4. A transmitting unit that transmits information about TCI states that are set or activated based on the terminal capability relating to the total number of first transmit configuration index (TCI) states set for one channel or signal and second TCI states set for multiple types of channels or signals, The system includes a control unit that controls at least one of UL transmission and DL reception based on the information regarding the TCI state, The total number of the first TCI states and the second TCI states is the total number of the first TCI states and the second TCI states that can be set or activated in at least one of the following: per partial bandwidth, per cell, per band, per frequency range, and per terminal, for a base station.

5. A system having the terminal of claim 1 and the base station of claim 4.