Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is provided with: a reception unit that receives a Medium Access Control (MAC) control element that activates a unified transmission setting indication (TCI) state by means of a plurality of transmission / reception points (TRP), and a control unit that controls the Medium Access Control (MAC) control element that activates a unified transmission setting indication (TCI) state by means of a plurality of transmission / reception points (TRP); and a control unit that determines activation of the unified TCI state on the basis of a specific field included in the MAC CE. According to one embodiment of the present disclosure, it is possible to appropriately perform application in a TCI state.

Description

Technical Field

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

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized for the purpose of further high-speed data rates and low latency (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) has been standardized for the purpose of further increasing the capacity and sophistication of LTE (Release (Rel.) 8 and 9 of the Third Generation Partnership Project (3GPP (registered trademark))).

[0003] Successor systems of LTE (also called, for example, fifth generation mobile communication system (5G), 5G+(plus), sixth generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.) are also being studied.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the invention

[0007] Problems to be solved by the invention

[0008] In future wireless communication systems (e.g., NR), research is underway to control transmission and reception processing in user terminals (terminal, user terminal, User Equipment (UE)) based on information related to Quasi-Co-Location (QCL) (QCL assumption / Transmission Configuration Indication (TCI) status / spatial relationship).

[0009] In Rel. 17, the use of TCI states (unified TCI states) applicable to a variety of signals (channels / reference signals) is being studied. Furthermore, in Rel. 18 and later, the use of unified TCI states in systems using multiple transmission / reception points (TRPs) is being studied.

[0010] However, there is still insufficient research on how to switch between the operations related to the unified TCI state specified in Rel. 17 and the operations related to the unified TCI state specified in Rel. 18 and later. If the research is insufficient, communication cannot be performed appropriately, and there is a concern that communication throughput will be reduced.

[0011] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately perform TCI state applications.

[0012] Means for solving problems

[0013] A terminal involved in one method of the present disclosure comprises: a receiving unit, which receives a medium access control (MAC) control element for activating a unified transmission configuration indication (TCI) state using multiple transmission reception points (TRPs); and a control unit, which determines the activation of the unified TCI state based on a specific field included in the MAC CE.

[0014] Effects of the Invention

[0015] According to one aspect of the present disclosure, the TCI state can be appropriately applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A as well as Figure 1B is a diagram showing an example of a unified / common TCI framework.

[0017] Figure 2A as well as Figure 2B This is a diagram showing an example of TCI status indication based on DCI.

[0018] Figure 3A as well as Figure 3B This is a diagram showing an example of the RRC field and the DCI field in Rel.17.

[0019] Figure 4 It is a diagram showing an example of unified TCI state activation / deactivation of MAC CE.

[0020] Figure 5 This is a diagram showing an example of the DCI size involved in the first embodiment.

[0021] Figure 6 This is a diagram showing an example of the DCI size involved in the second embodiment.

[0022] Figure 7 This is a diagram showing another example of the DCI size involved in the second embodiment.

[0023] Figure 8 This is a diagram showing an example of the association between the code point of the TCI field involved in the second embodiment and the TCI status.

[0024] Fig. 9 This is a diagram showing another example of the association between the code point of the TCI field involved in the second embodiment and the TCI status.

[0025] Fig.10 This is a diagram showing another example of the association between the code point of the TCI field involved in the second embodiment and the TCI status.

[0026] Fig.11 This is a diagram showing an example of a method for setting / activating / updating an index related to a TRP according to the third embodiment.

[0027] Fig. 12A as well as Fig. 12B This is a diagram showing an example of a MAC CE according to the third embodiment.

[0028] Fig.13 This is a diagram showing an example of MAC CE involved in implementation mode 4-1.

[0029] Fig.14 This is a diagram showing another example of the MAC CE involved in Implementation 4-1.

[0030] Fig.15 This is a diagram showing another example of the MAC CE involved in implementation mode 4-1.

[0031] Fig.16 This is a diagram showing an example of MAC CE involved in implementation mode 4-2.

[0032] Fig.17 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0033] Fig.18 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0034] Fig.19 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0035] Fig. 20 This is a diagram showing an example of the hardware configuration of a base station and a user terminal involved in one embodiment.

[0036] Fig.21 This is a diagram showing an example of a vehicle according to an embodiment. DETAILED DESCRIPTION

[0037] (TCI, spatial relationship, QCL)

[0038] In NR, research is underway 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) of at least one of a signal and a channel (expressed as signal / channel) in the UE based on the Transmission Configuration Indication state (TCI state).

[0039] The TCI state may also represent the TCI state applied to the downlink signal / channel. The TCI state equivalent to the TCI state applied to the uplink signal / channel may also be expressed as a spatial relation.

[0040] The so-called TCI status is information related to Quasi-Co-Location (QCL) of signals / channels, and may also be called spatial reception parameters, spatial relationship information, etc. The TCI status may also be set for each channel or each signal to the UE.

[0041] QCL is an indicator that indicates the statistical properties of a signal / channel. For example, it can also mean that when a certain signal / channel is in a QCL relationship with other signals / channels, it can be assumed that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter) is the same among these different signals / channels (at least one of them is QCL).

[0042] In addition, the spatial reception parameter may also correspond to a reception beam of the UE (eg, a reception analog beam), and the beam may also be determined based on the spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure may also be rewritten as sQCL (spatial QCL).

[0043] A plurality of types (QCL types) may be specified for QCL. For example, four QCL types, namely types AD, may be provided, and parameters (or parameter sets) that can be assumed to be the same in the four QCL types AD are different.

[0044] The situation where the UE assumes that a certain Control Resource Set (CORESET), channel or reference signal is in a specific QCL (e.g., QCL type D) relationship with other CORESETs, channels or reference signals may also be referred to as QCL assumption.

[0045] The UE may also determine at least one of the transmit beam (Tx beam) and receive beam (Rx beam) of the signal / channel based on the TCI state or QCL assumption of the signal / channel.

[0046] The TCI state may be, for example, information related to the QCL between the channel being the object (in other words, the reference signal (RS) used for the channel) and other signals (for example, other RS). The TCI state may also be set (indicated) by high-layer signaling, physical layer signaling, or a combination thereof.

[0047] The physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI)).

[0048] 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)).

[0049] In addition, the RS that is in a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (SynchronizationSignal Block (SSB)), a channel state information reference signal (CSI-RS), a measurement reference signal (Sounding Reference Signal (SRS)), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called QRS).

[0050] The SSB is a signal block including at least one of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a broadcast channel (physical broadcast channel (PBCH)). The SSB may also be referred to as an SS / PBCH block.

[0051] The RS of QCL type X in the TCI state may also mean an RS that is in a QCL type X relationship with (a DMRS of) a certain channel / signal, and the RS may also be referred to as a QCL source of QCL type X in the TCI state.

[0052] [Data physical layer process / antenna port QCL]

[0053] For a UE, a detected PDCCH with DCI destined for the UE and a given serving cell can be followed by a list of up to M TCI-State settings in the higher layer parameter PDSCH-Config configured for decoding of the PDSCH, where M depends on the UE capability maxNumberConfiguredTCIstatesPerCC.

[0054] Each TCI-State includes parameters for setting the QCL relationship between one or two downlink reference signals and the DMRS port of the PDSCH, the DMRS port of the PDCCH, or the CSI-RS port of the CSI-RS resource. The QCL relationship is set by the high-level parameter qcl-Type1 for the first DL RS and (if set) the high-level parameter qcl-Type2 for the second DL RS.

[0055] In the case of 2 DL RSs, multiple QCL types are different regardless of whether the reference is to the same DL RS or to different DL RSs. The QCL type corresponding to each DL RS is given by the high-level parameter qcl-Type in QCL-Info, taking one of the following values.

[0056] - 'typeA': {Doppler shift, Doppler spread, average delay, delay spread}

[0057] - 'typeB': {Doppler shift, Doppler spread}

[0058] - 'type C': {Doppler shift, average delay}

[0059] - 'typeD': {Spatial Rx parameter}

[0060] [RRC protocol specification / RRC IE / TCI status]

[0061] TCI-State associates one or two DL reference signals (RS) with the corresponding QCL type. When an additional physical cell identifier (PCI) is set for the RS, the same value is set for both DL RSs.

[0062] (unified / common TCI framework)

[0063] According to the unified TCI framework, multiple (UL / DL) channels / RS can be controlled through a common framework. In the unified TCI framework, instead of specifying the TCI state or spatial relationship for each channel as in Rel.15, it is possible to indicate a common beam (common TCI state) and apply it to all UL and DL channels, or to apply the common beam for UL to all UL channels and the common beam for DL ​​to all DL channels.

[0064] One common beam for both DL and UL, or a common beam for DL ​​and a common beam for UL (two common beams in total) is under study.

[0065] The UE may also 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 also assume different TCI states for each of UL and DL (independent (separate) TCI state, independent TCI pool, UL independent TCI pool and DL independent TCI pool, independent common TCI pool, UL common TCI pool and DL common TCI pool).

[0066] It is also possible to align the default beams for UL and DL through MAC CE-based beam management (MAC CE-level beam indication). It is also possible to update the default TCI state of PDSCH and match it with the default UL beam (spatial relationship).

[0067] A common beam / unified TCI state may also be indicated from the same TCI pool (joint common TCI pool, joint TCI pool, set) for both UL and DL through DCI-based beam management (DCI level beam indication). X (>1) TCI states may also be activated through MAC CE. The UL / DL DCI may also select one of the X activated TCI states. The selected TCI state may also be applied to channels / RS for both UL and DL.

[0068] Regarding the TCI pool (set), it can be multiple TCI states set by RRC parameters, or multiple TCI states (activated TCI state, activated TCI pool, set) activated by MAC CE among multiple TCI states set by RRC parameters. Each TCI state can also be a QCL type A / D RS. As a QCL type A / D RS, SSB, CSI-RS or SRS can also be set.

[0069] The number of TCI states corresponding to each of more than one TRP may also be specified. For example, the number N (≥1) of TCI states (UL TCI states) applied to UL channels / RSs and the number M (≥1) of TCI states (DL TCI states) applied to DL channels / RSs may also be specified. At least one of N and M may also be notified / set / indicated to the UE via high-layer signaling / physical layer signaling.

[0070] In the present disclosure, the case recorded as N=M=X (X is an arbitrary integer) may also mean that X (corresponding to X TRPs) common TCI states for UL and DL (joint TCI states) are notified / set / indicated to the UE. In addition, the case recorded as N=X (X is an arbitrary integer) and M=Y (Y is an arbitrary integer, and may also be Y=X) may also mean that X (corresponding to X TRPs) UL TCI states and Y (corresponding to Y TRPs) DL TCI states (i.e., independent TCI states) are notified / set / indicated to the UE respectively.

[0071] For example, the case recorded as N=M=1 may also mean that, for the UE, a TCI state common to UL and DL for a single TRP (joint TCI state for a single TRP) is notified / set / indicated.

[0072] In addition, for example, the case recorded as N=1, M=1 may also mean that, for the UE, one UL TCI state and one DL TCI state for a single TRP are separately notified / set / indicated (independent TCI state for a single TRP).

[0073] In addition, for example, the case recorded as N=M=2 may also mean that, for the UE, multiple (two) TCI states common to UL and DL (joint TCI state for multiple TRPs) are notified / set / indicated.

[0074] In addition, for example, the case recorded as N=2, M=2 may also mean that, for the UE, multiple (two) UL TCI states and multiple (two) DL TCI states (independent TCI states for multiple TRPs) are notified / set / indicated.

[0075] In the above example, the case where the values ​​of N and M are 1 or 2 is described, but the values ​​of N and M may be 3 or more, and N and M may be different.

[0076] Support for N=M=1 is being studied in Rel.17. Support for other situations is being studied in Rel.18 and later.

[0077] exist Figure 1A In the example, the RRC parameter (information element) sets multiple TCI states for both DL and UL. The MACCE may also activate multiple TCI states among the multiple TCI states that are set. The DCI may also indicate one of the multiple activated TCI states. The DCI may also be a UL / DL DCI. The indicated TCI state may also be applied to at least one (or all) of the channels / RSs of the UL / DL. A DCI may also indicate both UL TCI and DL TCI.

[0078] In the example of this figure, one point may be one TCI state applied to both UL and DL, or two TCI states applied to UL and DL respectively.

[0079] At least one of the multiple TCI states set by RRC parameters and the multiple TCI states activated by MAC CE can also be called a TCI pool (public TCI pool, joint TCI pool, TCI state pool). The multiple TCI states activated by MAC CE can also be called an activated TCI pool (activated public TCI pool).

[0080] In addition, in the present disclosure, a high-level parameter (RRC parameter) for setting a plurality of TCI states may also be referred to as setting information for setting a plurality of TCI states, or simply referred to as "setting information". In addition, in the present disclosure, the situation where one of a plurality of TCI states is indicated using DCI may also be the situation where indication information for indicating one of a plurality of TCI states included in the DCI is received, or simply referred to as receiving "indication information".

[0081] exist Figure 1BIn the example, the RRC parameters set multiple TCI states for both DL and UL (joint common TCI pool). The MAC CE may also activate multiple TCI states among the multiple TCI states that are set (activate TCI pool). Alternatively, a (separate) activation TCI pool for each of UL and DL may be set / activated.

[0082] DL DCI or a new DCI format may also select (indicate) more than one (for example, one) TCI state. The selected TCI state may also be applied to more than one (or all) DL channels / RS. The DL channel may also be PDCCH / PDSCH / CSI-RS. The UE may also use the TCI state action (TCI framework) of Rel.16 to determine the TCI state of each DL channel / RS. UL DCI or a new DCI format may also select (indicate) more than one (for example, one) TCI state. The selected TCI state may also be applied to more than one (or all) UL channels / RS. The UL channel may also be PUSCH / SRS / PUCCH. In this way, UL TCI and DL DCI may also be indicated separately by different DCIs.

[0083] After Rel.17 NR, it is envisaged to support the activation / indication of TCI states associated with different physical cell identifiers (PCIs) through MAC CE / DCI for beams. In addition, after Rel.18 NR, it is envisaged to support the change of serving cells to cells with different PCIs through MAC CE / DCI.

[0084] [Data physical layer process / antenna port QCL]

[0085] In order to provide reference signals for DMRS of PDSCH and DMRS and CSI-RS of PDCCH within a CC, and further, in order to provide a reference for determining the UL TCI filter when it is possible to utilize PUSCH and PUCCH resources and UL TX spatial filters for SRS based on dynamic permission and permission settings within a CC, a list of up to 128 DLorJointTCIState settings can be set for the UE in PDSCH-Config.

[0086] In the case where there is no DLorJointTCIState or UL-TCIState setting in the BWP in the CC, the UE can apply the DLorJointTCIState or UL-TCIState setting from the reference BWP of the reference CC. When the UE is configured with DLorJointTCIState or UL-TCIState in any CC in the same band, it is not assumed that TCI-State, SpatialRelationInfo (spatial relationship information), PUCCH-SpatialRelationInfo (PUCCH spatial relationship information) other than SpatialRelationInfoPos (spatial relationship information for position) in the band is configured. The UE is assumed to be: when the UE is set to the TCI-State in any CC in the CC list through simultaneousTCI-UpdateList1-r16 (simultaneous TCI update list 1), simultaneousTCI-UpdateList2-r16 (simultaneous TCI update list 2), simultaneousSpatial-UpdatedList1-r16 (simultaneous spatial update list 1), or simultaneousSpatial-UpdatedList2-r16 (simultaneous spatial update list 2), the UE is not set to the DLorJointTCIState or UL-TCIState in any CC within the CC.

[0087] The UE receives an activation command for mapping up to 8 TCI states and / or pairs of TCI states, with 1 TCI state for DL ​​channels / signals and 1 TCI state for UL channels / signals, to code points of the DCI field 'Transmission Configuration Indication' (TCI) for one CC / DL BWP or a set of CC / DL BWPs, if applicable. In case a set of TCI state IDs is activated for a set of CC / DL BWPs and, if applicable, for one CC / DL BWP, the same set of TCI state IDs is applied for all DL and / or UL BWPs in the indicated CC. Here, the applicable list of CCs is determined by the CC indicated in the activation command. In the case where the activation command maps DLorJointTCIState and / or UL-TCIState to only one TCI code point, the UE applies the indicated DLorJointTCIState and / or UL-TCIState to one CC / DL BWP or a set of CC / DL BWPs. If the indicated mapping corresponding to a single TCI code point is applied, the indicated DLorJointTCIState and / or UL-TCIState is applied to one CC / DL BWP or a set of CC / DL BWPs.

[0088] When the bwp-id or cell of the QCL type A / D source RS in the QCL-Info for the TCI state in which DLorJointTCIState is set is not set, the UE assumes that the QCL type A / D source RS is set in the CC / DL BWP to which the TCI state is applied.

[0089] (TCI status indication)

[0090] The Rel.17 unified TCI framework supports the following modes 1 to 3.

[0091] [Mode 1] MAC CE based TCI state indication

[0092] [Mode 2] DCI based TCI state indication by DCI format 1_1 / 1_2with DL assignment

[0093] [Mode 3] DCI based TCI state indication by DCI format 1_1 / 1_2 without DL assignment

[0094] A UE with a TCI state configured and activated with a Rel.17 TCI state ID (e.g., tci-StateId_r17) receives: a DCI format 1_1 / 1_2 indicating a TCI state with a Rel.17 TCI state ID is provided for one CC, or receives: a DCI format 1_1 / 1_2 indicating a TCI state with a Rel.17 TCI state ID is provided for all CCs in the same CC list as the CC list configured by simultaneous TCI update list 1 or simultaneous TCI update list 2 (e.g., simultaneousTCI-UpdateList1 or simultaneousTCI-UpdateList2). For DCI format 1_1 / 1_2, if DL allocation can be used, it may be accompanied by DL allocation or not.

[0095] In the case where DCI format 1_1 / 1_2 is not accompanied by DL allocation, the UE can assume (verify) the following for the DCI.

[0096] - CS-RNTI is used to scramble the CRC for DCI.

[0097] - The values ​​of the following DCI fields (special fields) are set as follows:

[0098] - The redundancy version (RV) field is all '1's.

[0099] - The modulation and coding scheme (MCS) field is all '1's.

[0100] - The new data indicator (NDI) field is 0.

[0101] - The frequency domain resource assignment (FDRA) field is all '0's for FDRA type 0, or all '1's for FDRA type 1, or all '0's for DynamicSwitch (same as validation for PDCCH for release of DL semi-persistent scheduling (SPS) or UL grant type 2 scheduling).

[0102] In addition, the DCI in the above-mentioned mode 2 / mode 3 can also be called beam indication DCI.

[0103] In Rel.15 / 16, if the UE does not support activation BWP changes via DCI, the UE ignores the BWP indicator field. Similar actions are being studied regarding the relationship between support of Rel.17 TCI states and interpretation of the TCI field. Study is underway to always have the TCI field in DCI format 1_1 / 1_2 when the UE is configured with Rel.17 TCI states, and to ignore the TCI field when the UE does not support TCI updates via DCI.

[0104] In Rel.15 / 16, whether the TCI field exists (TCI presence information in DCI, tci-PresentInDCI) is set for each CORESET.

[0105] The TCI field in DCI format 1_1 is 0 bits when the higher layer parameter tci-PresentInDCI is not valid, otherwise it is 3 bits. When the BWP indicator field indicates a BWP other than the activated BWP, the UE follows the following actions.

[0106] [Action] In the case where tci-PresentInDCI is not valid for the CORESET used to convey the PDCCH of DCI format 1_1, the UE assumes that tci-PresentInDCI is not valid for all CORESETs within the indicated BWP. Otherwise, the UE assumes that tci-PresentInDCI is valid for all CORESETs within the indicated BWP.

[0107] The TCI field in DCI format 1_2 is 0 bit when the higher layer parameter tci-PresentInDCI-1-2 is not set, otherwise it is 1 or 2 or 3 bits determined by the higher layer parameter tci-PresentInDCI-1-2. When the BWP indicator field indicates a BWP other than the activated BWP, the UE follows the following actions.

[0108] [Action] In case the higher layer parameter tci-PresentInDCI-1-2 is not set for the CORESET of the PDCCH used to convey the DCI format 1_2, the UE assumes that tci-PresentInDCI is not valid for all CORESETs within the indicated BWP. Otherwise, the UE assumes that: for all CORESETs within the indicated BWP, tci-PresentInDCI-1-2 is set with the same value as tci-PresentInDCI-1-2 set for the CORESET of the PDCCH used to convey the DCI format 1_2.

[0109] Figure 2A An example of a joint DL / UL TCI state indication based on DCI is shown. The value of the TCI field for joint DL / UL TCI state indication is associated with a TCI state ID indicating the joint DL / UL TCI state.

[0110] Figure 2B An example of an independent DL / UL TCI state indication based on DCI. The value of the TCI field used for the independent DL / UL TCI state indication is associated with at least one TCI state ID of a TCI state ID indicating a DL-only TCI state and a TCI state ID indicating a UL-only TCI state. In this example, TCI field values ​​000 to 001 are associated with only one TCI state ID for DL, TCI field values ​​010 to 011 are associated with only one TCI state ID for UL, and TCI field values ​​100 to 111 are associated with both one TCI state ID for DL ​​and one TCI state ID for UL.

[0111] (Indicates TCI status / Sets TCI status)

[0112] For the Rel.17 TCI state, the unified / common TCI state may also mean a Rel.17 TCI state indicated using DCI / MACCE / RRC (of Rel.17) (indicated Rel.17 TCI state).

[0113] In the present disclosure, indicated Rel.17 TCI state, indicated TCI state, unified / common TCI state, TCI state applied to multiple signals (channels / RS), and TCI state used for multiple signals (channels / RS) may also be overwritten with each other.

[0114] The Rel.17 TCI state indicated may also be shared with at least one of the UE-specific reception in the PDSCH / PDCC (updated using the DCI / MAC CE / RRC of Rel.17), the dynamically granted (DCI) / configured granted PUSCH, and multiple (e.g., all) dedicated PUCCH resources. The TCI state indicated by DCI / MAC CE / RRC may also be referred to as the indicated TCI state, the unified TCI state.

[0115] For Rel.17TCI state, TCI state other than unified TCI state may also mean Rel.17TCI state configured using (Rel.17's) MACCE / RRC (configured Rel.17TCI state). In the present disclosure, configured Rel.17TCI state, configured TCI state, TCI state other than unified TCI state, and TCI state applied to a specific type of signal (channel / RS) may also overwrite each other.

[0116] The Rel.17TCI state may also be set so that it is not shared with at least one of the UE-specific reception in the PDSCH / PDCC (updated by the DCI / MAC CE / RRC using Rel.17), the PUSCH with dynamic grant (DCI) / configured grant, and multiple (e.g., all) dedicated PUCCH resources. The Rel.17TCI state may also be set so that it is set by RRC / MAC CE for each CORESET / each resource / each resource set, and the Rel.17TCI state is not updated even if the above-mentioned indication Rel.17TCI state (common TCI state) is updated.

[0117] The application of Rel.17TCI status to UE-specific channels / signals (RS) is under study. In addition, the use of higher layer signaling (RRC signaling) to notify the UE of the application of Rel.17TCI status to non-UE-specific channels / signals and which Rel.17TCI status to set is under study.

[0118] We are studying to set the RRC parameters related to setting the Rel.17 TCI state (TCI state ID) to the same structure as the RRC parameters of the TCI state in Rel.15 / 16. We are studying to set the Rel.17 TCI state to be set / indicated per CORESET / per resource / per resource set using RRC / MAC CE. In addition, we are studying to determine the setting / indication based on specific parameters by the UE.

[0119] Research is underway to update the UE's TCI status indication and TCI status setting, respectively. For example, when the UE is updated with a unified TCI status indicating the TCI status, the TCI status setting may not be updated. In addition, research is underway to determine the update based on specific parameters for the UE.

[0120] In addition, whether to apply or not to indicate the Rel.17 TCI state for PDCCH / PDSCH (applying the Rel.17 TCI state, applying and indicating the TCI state separately) is being studied, and switching is performed using higher layer signaling (RRC / MAC CE).

[0121] In addition, regarding intra-cell beam indication (indication of TCI status), research is underway on UE-specific CORESET and PDSCH associated with the CORESET, and non-UE-specific CORESET and PDSCH associated with the CORESET, to support indication of Rel.17 TCI status.

[0122] In addition, regarding inter-cell beam indication (e.g., L1 / L2 inter-cell mobility), research is underway on UE-specific CORESET and PDSCH associated with the CORESET to support indication of Rel.17 TCI status.

[0123] In Rel.15, whether to indicate the TCI state for CORESET#0 depends on the implementation of the base station. In Rel.15, for CORESET#0 indicated with the TCI state, the indicated TCI state is applied. For CORESET#0 not indicated with the TCI state, the QCL of the SSB selected when the latest (most recent) PRACH was sent is applied.

[0124] In the unified TCI status framework after Rel.17, the TCI status related to CORESET#0 is being studied.

[0125] For example, in the framework of the unified TCI state after Rel.17, the Rel.17 TCI state indication of CORESET#0 determines whether to apply the indicated Rel.17 TCI state associated with the serving cell. This is set for each CORESET through RRC. If it is not applied, the legacy MAC CE / RACH signaling mechanism can also be used.

[0126] In addition, the CSI-RS associated with the Rel. 17 TCI state applied to CORESET#0 can also be QCLed with the SSB associated with the serving cell PCI (physical cell ID) (same as Rel. 15).

[0127] For CORESET#0, CORESET with common search space (CSS), CORESET with CSS and UE-specific search space (USS), it can also be set whether to follow the Rel.17TCI state indication for each CORESET through RRC parameters. In the case where the Rel.17TCI state indication is not set for the CORESET, the setting of the Rel.17TCI state can also be applied to the CORESET.

[0128] For non-UE-dedicated channels / RS (except CORESET), whether to follow the Rel.17TCI state can also be set by RRC parameters for each channel / resource / resource set. In the case where the Rel.17TCI state is not set for the channel / resource / resource set, the setting of the Rel.17TCI state can also be applied to the channel / resource / resource set.

[0129] (PUSCH repeated)

[0130] In Rel.17, the introduction of PUSCH repetition is under study.

[0131] Below, use Figure 3A as well as Figure 3B , the RRC field and DCI field involved in the repetition of PUSCH are explained.

[0132] As RRC fields involved in PUSCH transmission specified until Rel.16, there are fields related to SRS resource sets of codebook (CB) / non-codebook (NCB), fields related to mapping (power control) of SRI and PUSCH (sri-PUSCH-MappingToAddModList), and fields related to P0 of PUSCH for each SRI (p0-PUSCH-SetList).

[0133] In addition, as DCI fields related to PUSCH transmission specified up to Rel.16, there are an SRS resource indicator field, a field indicating precoding information and the number of layers, a field related to the association between PTRS and DMRS, and a TPC command field.

[0134] In Rel.17, when two SRS resource sets of CB / NCB are set, an SRS resource set indicator field is added to DCI format 0_1 / 0_2.

[0135] The SRS resource set indicator field has 2 bits. When the SRS resource set indicator field indicates the code point "00 (0)", it indicates a single TRP action using the 1st TRP (TRP1). When the SRS resource set indicator field indicates the code point "01 (1)", it indicates a single TRP action using the 2nd TRP (TRP2). When the SRS resource set indicator field indicates the code point "10 (2)", it indicates a multi-TRP action using the 1st TRP (TRP1) and the 2nd TRP (TRP2) in the order of repetition of PUSCH. When the SRS resource set indicator field indicates the code point "11 (3)", it indicates a multi-TRP action using the 2nd TRP (TRP2) and the 1st TRP (TRP1) in the order of repetition of PUSCH (refer to Figure 3B ).

[0136] When the SRS resource set indicator field is added to DCI format 0_1 / 0_2, a field related to the mapping (power control) of the second SRI and PUSCH (sri-PUSCH-MappingToAddModList2) and a field related to P0 of the PUSCH of each second SRI (p0-PUSCH-SetList2) are added as new fields of RRC (refer to Figure 3A ). These fields are used as fields for the second TRP (TRP2), and the above-mentioned existing fields are used as fields for the first TRP (TRP1).

[0137] In addition, when the SRS resource set indicator field is added to the DCI format 0_1 / 0_2, a second SRS resource indicator field, a field indicating the second precoding information and the number of layers, a field related to the association between the second PTRS and the DMRS, and a second TPC command field are added to the DCI format (refer to Figure 3A ). These fields are used as fields for the second TRP (TRP2), and the above-mentioned existing fields are used as fields for the first TRP (TRP1).

[0138] (UL TCI status)

[0139] In Rel.16 NR, the use of UL TCI status as a beam indication method for UL is being studied. The notification of UL TCI status is similar to the notification of DL beam (DL TCI status) of the UE. In addition, the DL TCI status can also be rewritten with the TCI status used for PDCCH / PDSCH.

[0140] The channel / signal (also referred to as target channel / RS) for which the UL TCI state is set (specified) may be, for example, at least one of PUSCH (DMRS of PUSCH), PUCCH (DMRS of PUCCH), random access channel (Physical Random Access Channel (PRACH)), SRS, etc.

[0141] In addition, the RS (source RS) that has a QCL relationship with the channel / signal may be, for example, a DL RS (eg, SSB, CSI-RS, TRS, etc.) or a UL RS (eg, SRS, SRS for beam management, etc.).

[0142] In the UL TCI state, the RS that forms a QCL relationship with the channel / signal can also be associated with the panel ID used to receive or send the RS. This association can be explicitly set (or specified) through high-level signaling (for example, RRC signaling, MAC CE, etc.) or can be implicitly determined.

[0143] The correspondence between the RS and the panel ID may be set in the UL TCI status information, or may be set in at least one of the resource setting information, spatial relationship information, etc. of the RS.

[0144] The QCL type represented by the UL TCI state may be the existing QCL type AD or other QCL types, and may also include a specific spatial relationship, an associated antenna port (port index), and the like.

[0145] If a panel ID is specified for UL transmission (for example, specified by DCI), the UE may also use the panel corresponding to the panel ID for the UL transmission. The panel ID may also be associated with the UL TCI state, and the UE may also determine the panel used in the UL channel / signal transmission in accordance with the panel ID associated with the UL TCI state when the UL TCI state is specified (or activated) for a specific UL channel / signal.

[0146] (Channel / RS to which TCI status is applied)

[0147] The MAC CE / DCI-based indicated TCI state can also be applied to the following channels / RS.

[0148] [PDCCH]

[0149] ・When followUnifiedTCIState is set for CORESET0, the indicated TCI state is applied. Otherwise, the Rel.15 specification is applied to this CORESET. That is, CORESET0 follows the TCI state activated by MACCE or performs QCL with SSB.

[0150] ・For CORESETs other than index 0 with USS / CSS type 3, the indication TCI status is always applied.

[0151] ・When the unified TCI state is set for a CORESET other than index 0 with at least CSS other than CSS type 3, the indicated TCI state is applied. Otherwise, the configured TCI state ("configuredTCI state") corresponding to the CORESET is applied to the CORESET.

[0152] [PDSCH]

[0153] ・For all UE-dedicated PDSCHs, the TCI status is always indicated.

[0154] ・For non-UE-dedicated PDSCH (PDSCH scheduled by DCI in CSS), the indicated TCI state may also be applied when followUnifiedTCIState is set (for the CORESET of the PDCCH that schedules the PDSCH). Otherwise, the set TCI state for the PDSCH is applied to the PDSCH. For PDSCH, whether to follow the indicated TCI state for non-UE-dedicated PDSCH may also be determined based on whether followUnifiedTCIState is set for the CORESET used for scheduling the PDSCH when followUnifiedTCIState is not set.

[0155] [CSI-RS]

[0156] ・For A-CSI-RS for CSI acquisition or beam management, if followUnifiedTCIState is set (for CORESET of the PDCCH that triggers the A-CSI-RS), the indicated TCI state is applied. For other CSI-RS, the configured TCI state for the CSI-RS is applied.

[0157] [PUCCH]

[0158] ・For all dedicated PUCCH resources, the TCI status is always indicated.

[0159] [PUSCH]

[0160] ・For dynamic / configured granted PUSCH, always indicate TCI status.

[0161] [SRS]

[0162] ・When the SRS resource set for A-SRS for beam management and A / SP / P-SRS for codebook (CB) / non-codebook (NCB) / antenna switching is set to follow the unified TCI state, the indicated TCI state is applied. The set TCI state in the SRS resource set is applied to other SRS.

[0163] (Unified TCI status activation / deactivation of MAC CE)

[0164] In Rel.17, a MAC CE for activating / deactivating the unified TCI state is specified.

[0165] Figure 4 1 is a diagram showing an example of unified TCI state activation / deactivation of MAC CE. Figure 4 The MAC CE shown includes: a field indicating the service cell ID, a field indicating the DL BWP ID, a field indicating the UL BWP ID, a TCI state ID field ("TCI state ID j" (j is an integer greater than 1 and less than N)), a field indicating the number of TCI states corresponding to the corresponding TCI state field ("Pi" (i is an integer greater than 1)), a field indicating whether the TCI state of the corresponding TCI state field is DL / joint or UL ("D / U"), and a reserved bit field ("R").

[0166] For the UE, the unified TCI state (joint TCI state or independent (DL / UL) TCI state) is activated using the activation based on the MAC CE.

[0167] (analyze)

[0168] However, in future wireless communication systems (e.g., Rel.18 and later), research is underway to introduce a unified TCI state framework in multiple TRP actions.

[0169] In multi-TRP action, indication of one or more TCI states based on a single DCI (single-DCI) and indication of one or more TCI states based on multiple DCIs (multi-DCI) are being studied.

[0170] In a single DCI, research is underway to indicate one or more TCI states using one TCI field.

[0171] In multi-DCI, indicating one or more TCI states by at least one of the following methods is being studied.

[0172] ・Reuse the scheme of multiple TRPs based on a single DCI (defined up to Rel.16). That is, indicate one or more TCI states through one TCI field.

[0173] ・The existing TCI field in the DCI format associated with a CORESET pool index of 1 value (eg, DCI format 1_1 / 1_2, DCI format with / without DL allocation) is used to indicate the joint / DL / UL TCI state corresponding to the same CORESET pool index.

[0174] ・The existing TCI field in the DCI format (eg, DCI format 1_1 / 1_2, DCI format with / without DL allocation) is utilized to indicate all joint / DL / UL TCI states corresponding to two (both) CORESET pool indices.

[0175] ・The existing TCI field in the DCI format associated with a CORESET pool index of 1 value (eg, DCI format 1_1 / 1_2, DCI format with / without DL allocation) is used to indicate the joint / DL / UL TCI state corresponding to the same or different CORESET pool index.

[0176] In addition, in the PUSCH / PUCCH repetition of multiple TRPs specified in Rel.17, support for (dynamic) switching between single TRP and multiple TRPs is being studied.

[0177] Regarding the PUSCH, a new DCI field of the SRS resource set indicator may also be used for the switch.

[0178] Regarding the PUCCH, the switching may be performed by activating one or more (for example, two) spatial relationships for each PUCCH resource.

[0179] However, in the unified TCI status framework introduced after Rel.18, if the beam application time is taken into account, it is not possible to use the DCI (scheduling DCI) for scheduling each channel / signal to control the number of TCI status indications.

[0180] In addition, different UE actions need to be specified in the unified TCI state specified in Rel.17 and the unified TCI state specified in Rel.18 and later.

[0181] For example, the introduction of DCI fields (new DCI fields or existing DCI fields) in order to (dynamically) switch between single TRP and multiple TRP in the unified TCI state specified in Rel.18 and later is being studied. On the other hand, the unified TCI state specified in Rel.17 does not support multiple TRP actions, so there is no special need for a field for switching.

[0182] In addition, in the unified TCI state specified in Rel.17 and the unified TCI state specified in Rel.18 and later, in addition to the above-mentioned switching, the beam application time (BAT), default QCL / TCI state, and the association between the indicated TCI state and each channel / RS are also different, and this point is also being studied.

[0183] However, there is still insufficient research on how to indicate / switch the unified TCI state specified in Rel. 17 and the unified TCI state specified in Rel. 18 and later. If this research is insufficient, the TCI state applied to each channel / signal cannot be appropriately determined, and there is a concern that communication throughput will be reduced.

[0184] Therefore, the inventors of the present invention have conceived a method for appropriately performing actions related to the unified TCI state.

[0185] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the embodiments may be applied individually or in combination.

[0186] In the present disclosure, "A / B" and "at least one of A and B" may be replaced with each other. In addition, in the present disclosure, "A / B / C" may also mean "at least one of A, B, and C".

[0187] In the present disclosure, notification, activation, deactivation, indication (or designation), selection, configuration, update, determination, etc. may also be mutually rewritten. In the present disclosure, support, control, controllable, operation, and operationable may also be mutually rewritten.

[0188] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, high-layer parameters, fields, Information Element (IE), settings, etc. may also be overwritten with each other. In the present disclosure, Medium Access Control (MAC) control elements (MAC Control Element (CE)), update commands, activation / deactivation commands, etc. may also be overwritten with each other.

[0189] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0190] In the present disclosure, MAC signaling may also use, for example, MAC Control Element (MACCE), MAC Protocol Data Unit (MAC Protocol Data Unit (PDU)), etc. Broadcast information may also be, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

[0191] In the present disclosure, the physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI)), etc.

[0192] In the present disclosure, an index, an identifier (ID), an indicator, a resource ID, etc. may also be overwritten with each other. In the present disclosure, a sequence, a list, a set, a group, a cluster, a subset, etc. may also be overwritten with each other.

[0193] In the present disclosure, panel, receiving panel, UE panel, UE capability value (UE Capability value), UE capability value set (UE Capability value set), panel group, beam, beam group, precoder, uplink (Uplink (UL)) transmitting entity, transmission / reception point (Transmission / Reception Point (TRP)), base station, spatial relationship information (Spatial Relation Information (SRI)), spatial relationship, SRS resource indicator (SRS Resource Indicator (SRI)), control resource set (COntrol REsource SET (CORESET)), physical downlink shared channel (Physical Downlink Shared Channel (PDSCH)), codeword (Codeword (CW)), transport block (Transport Block (TB)), reference signal (Reference Signal (RS)), antenna port (e.g., demodulation reference signal (DeModulation Reference Signal (DMRS)) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relationship group, code division multiplexing (Code Division Multiplexing (CDM)) group, reference signal group, CORESET group, Physical Uplink Control Channel (PUCCH) group, PUCCH resource group), resources (e.g., reference signal resources, SRS resources), resource sets (e.g., reference signal resource sets), CORESET pool, downlink transmission configuration indication state (Transmission Configuration Indication state (TCI state)) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, indicated TCI state, Quasi-Co-Location (QCL)), QCL assumptions, etc. can also be rewritten mutually.

[0194] In addition, the spatial relationship information identifier (Identifier (ID)) (TCI state ID) and the spatial relationship information (TCI state) can also be overwritten with each other. "Spatial relationship information" can also be overwritten with "a collection of spatial relationship information", "one or more spatial relationship information", etc. TCI state and TCI can also be overwritten with each other.

[0195] In addition, the panel identifier (Identifier (ID)) and the panel can also be overwritten with each other. That is, the TRP ID and the TRP, the CORESET group ID and the CORESET group, etc. can also be overwritten with each other.

[0196] In the present disclosure, TRP, transmission point, panel, DMRS port group, CORESET pool, and one of the two TCI states associated with one code point of the TCI field can also overwrite each other.

[0197] In the present disclosure, the transmission / reception of a channel / signal using a single TRP may also be rewritten so that the TCI states (joint / independent / indicative TCI states) are equal in the transmission / reception of the channel / signal (e.g., NCJT / CJT / repetition), or the number of TCI states (joint / independent / indicative TCI states) in the transmission / reception of the channel / signal (e.g., NCJT / CJT / repetition) is 1.

[0198] The transmission / reception of a channel / signal using a single TRP may also be rewritten so that the TCI states (joint / independent / indicative TCI states) are different in the transmission / reception of the channel / signal (for example, NCJT / CJT / repeatedly), or the number of different TCI states (joint / independent / indicative TCI states) in the transmission / reception of the channel / signal (for example, NCJT / CJT / repeatedly) is multiple (for example, 2).

[0199] In the present disclosure, single (single) TRP, single TRP system, single TRP transmission, single PDSCH, can also be rewritten to each other. In the present disclosure, multiple (multiple) TRPs, multiple TRP systems, multiple TRP transmissions, and multiple PDSCHs can also be rewritten to each other.

[0200] In the present disclosure, a single DCI, a single PDCCH, multiple TRPs based on a single DCI, 2 TCI states activated on at least one TCI code point, at least one code point of the TCI field is mapped to 2 TCI states, and a specific index (for example, a TRP index, a CORESET pool index, or an index corresponding to a TRP) is set for a specific channel / CORESET can also overwrite each other.

[0201] In the present disclosure, a single TRP, a channel / signal using a single TRP, a channel using one TCI state / spatial relationship, multiple TRPs not activated through RRC / DCI, multiple TCI states / spatial relationships not activated through RRC / DCI, a CORESET pool index (CORESETPoolIndex) value of 1 is not set for any CORESET, and any code point of the TCI field is not mapped to 2 TCI states can also overwrite each other.

[0202] In the present disclosure, multiple TRPs, channels / signals using multiple TRPs, channels using multiple TCI states / spatial relationships, multiple TRPs activated through RRC / DCI, multiple TCI states / spatial relationships activated through RRC / DCI, multiple TRPs based on a single DCI, and at least one of multiple TRPs based on multiple DCIs may also be overwritten with each other.

[0203] In the present disclosure, multiple TRPs based on multiple DCIs, a CORESET pool index (CORESETPoolIndex) value set to 1 for CORESET, and multiple specific indexes (for example, TRP index, CORESET pool index, or index corresponding to TRP) set for a specific channel / CORESET can also overwrite each other.

[0204] In the present disclosure, TRP#1 (the first TRP) can correspond to either CORESET pool index = 0 or the first TCI state of the two TCI states corresponding to one code point of the TCI field. TRP#2 (the second TRP) TRP#1 (the first TRP) can correspond to either CORESET pool index = 1 or the second TCI state of the two TCI states corresponding to one code point of the TCI field.

[0205] In the present disclosure, single DCI (sDCI), single PDCCH, multi-TRP system based on single DCI, MTRP based on sDCI, and 2 TCI states activated on at least one TCI code point can also overwrite each other.

[0206] In the present disclosure, multi-DCI (mDCI), multi-PDCCH, multi-TRP system based on multi-DCI, MTRP based on mDCI, 2 CORESET pool indexes set or CORESET pool index = 1 (or a value greater than 1) may also be overwritten.

[0207] In the present disclosure, beam indication DCI, beam indication MAC CE, and beam indication DCI / MAC CE may also be rewritten with each other. In other words, indications related to the TCI status indication for the UE may also be performed using at least one of the DCI and the MAC CE.

[0208] In the present disclosure, repetition, repeated transmission, and repeated reception may be replaced with each other.

[0209] In the present disclosure, channels, signals, and channels / signals may also be overwritten with each other. In the present disclosure, DL channels, DL signals, DL signals / channels, transmission / reception of DL signals / channels, DL reception, and DL transmission may also be overwritten with each other. In the present disclosure, UL channels, UL signals, UL signals / channels, transmission / reception of UL signals / channels, UL reception, and UL transmission may also be overwritten with each other.

[0210] In the present disclosure, applying the TCI state / QCL concept to each channel / signal / resource may also mean applying the TCI state / QCL concept in the transmission and reception of each channel / signal / resource.

[0211] In the present disclosure, the 1st TCI state may also correspond to the 1st TRP. In the present disclosure, the 2nd TCI state may also correspond to the 2nd TRP. In the present disclosure, the nth TCI state may also correspond to the nth TRP.

[0212] In the present disclosure, the value of the 1st CORESET pool index (e.g., 0), the value of the 1st TRP index (e.g., 1), and the 1st TCI state (the 1st DL / UL (joint / independent) TCI state) may also correspond to each other. In the present disclosure, the value of the 2nd CORESET pool index (e.g., 1), the value of the 2nd TRP index (e.g., 2), and the 2nd TCI state (the 2nd DL / UL (joint / independent) TCI state) may also correspond to each other.

[0213] In addition, in each embodiment of the present disclosure described below, regarding the application of multiple TCI states in the transmission and reception using multiple TRPs, the method with two TRPs as the object (i.e., the case where at least one of N and M is 2) is mainly described, but the number of TRPs may be more than 3 (multiple), and each embodiment may be applied in a manner corresponding to the number of TRPs. In other words, at least one of N and M may also be a number greater than 2.

[0214] In the present disclosure, receiving a DL signal (PDSCH / PDCCH) using SFN may also mean using the same time / frequency resources and / or receiving the same data (PDSCH) / control information (PDCCH) from multiple transmission and reception points. In addition, receiving a DL signal using SFN may also mean using the same time / frequency resources and / or using multiple TCI states / spatial domain filters / beams / QCLs to receive the same data / control information.

[0215] In the present disclosure, the indicated TCI state, the unified TCI state, the unified TCI state in which multiple TRPs are not set / utilized / applied, the unified TCI state specified in Rel.17, the Rel.17 unified TCI state, and the first unified TCI state can also overwrite each other.

[0216] In the present disclosure, the indicated TCI state, the unified TCI state, the unified TCI state in which multiple TRPs are set / utilized / applied, the unified TCI state in which multiple TRPs can be set / utilized / applied, the indicated TCI state in which multiple TRPs are set / utilized / applied, the indicated TCI state in which multiple TRPs can be set / utilized / applied, the unified TCI state specified in Rel.18, the Rel.18 unified TCI state, the unified TCI state for multiple TRPs, and the second unified TCI state can also be overwritten by each other.

[0217] (Wireless Communication Method)

[0218] The UE may also indicate (Rel.17 / 18) that the TCI status applies to a specific channel / signal.

[0219] The specific channel / signal may also be a UE-specific (dedicated) DL channel / signal. The UE-specific DL channel / signal may also be a UE-specific PDCCH / PDSCH / CSI-RS (eg, aperiodic (A-) CSI-RS).

[0220] The specific channel / signal may also be a specific UL channel / signal. The specific UL channel / signal may also be at least one of a PUSCH indicated by DCI (indicated by dynamic grant), a configured grant PUSCH, multiple (all) specific PUCCHs (resources), and an SRS (e.g., aperiodic (aperiodic (A-)) SRS).

[0221] In addition, in each embodiment of the present disclosure, examples are mainly recorded in which the number of TCI states indicated to the UE is 1 or 2, but the number of TCI states indicated is not limited thereto. For example, the number of TCI states indicated to the UE may also be a number greater than 3 (for example, 4).

[0222] Below, each embodiment of the present disclosure can also be applied to PDSCH of a single TRP.

[0223] The PDSCH of a single TRP may also be scheduled through a specific DCI (DCI format). The specific DCI format may also be, for example, DCI format 1_0 (or a DCI format that does not include a TCI field). The specific DCI format may also be DCI format 1_1 / 1-2. The specific DCI format may also indicate 1 TCI state.

[0224] The QCL assumption for PDSCH of a single TRP may also be the default TCI state. The default TCI state may also be 1 TCI state (in any DCI format).

[0225] The repeated transmission of multiple TRPs may not be set to the UE. In this case, the PDSCH of a single TRP may be scheduled as a PDSCH of a single-layer MIMO (with single-layer MIMO).

[0226] The PDSCH of a single TRP may also be the PDSCH when multiple TRPs (eg, CORESET pool index) are not set to the UE.

[0227] The PDSCH of a single TRP may also be a PDSCH scheduled by at least a CORESET of a CSS. The PDSCH of a single TRP may also be a PDSCH scheduled by a CORESET of only a CSS (or a CSS other than a type 3 CSS).

[0228] Below, each embodiment of the present disclosure can also be applied to PDSCH of multiple TRPs.

[0229] The PDSCH of a single TRP can also be scheduled through a specific DCI (DCI format). The specific DCI format can also be DCI format 1_1 / 1-2. The specific DCI format can also indicate 2 TCI states.

[0230] The QCL assumption for PDSCH of multiple TRPs can also be the default TCI state. The default TCI state can also be 2 TCI states (in any DCI format).

[0231] The repeated transmission of multiple TRPs may not be set to the UE. In this case, the PDSCH of multiple TRPs may also be scheduled as a PDSCH of multi-layer MIMO (with multi-layer MIMO).

[0232] The PDSCH of multiple TRPs may also be the PDSCH when repeated transmission of multiple TRPs is set to the UE. In this case, the PDSCH of multiple TRPs may also be scheduled as a PDSCH that is repeatedly transmitted (using TDM / FDM / SDM) (with repetition).

[0233] The PDSCH of multiple TRPs may also be the PDSCH when SFN scheme A / B is set to the UE. The PDSCH of multiple TRPs may also be the PDSCH with multiple TCI states.

[0234] Below, each embodiment of the present disclosure can also be applied to PDCCH of a single TRP.

[0235] The PDCCH of a single TRP may also be a PDCCH that is not associated with the CORESET that sets SFN scheme A / B.

[0236] The PDCCH of a single TRP may also be a PDCCH associated with a CORESET that is not configured to be repeatedly transmitted (by two linked SSs).

[0237] Below, each embodiment of the present disclosure can also be applied to PDCCH of multiple TRPs.

[0238] The PDCCH of multiple TRPs can also be the PDCCH associated with the CORESET that sets SFN scheme A / B.

[0239] Below, the various embodiments of the present disclosure can also be applied to PUSCH / PUCCH of a single TRP.

[0240] The PUSCH / PUCCH of a single TRP may also be a PUSCH / PUCCH that is repeatedly transmitted without setting multiple TRPs.

[0241] Below, each embodiment of the present disclosure can also be applied to PUSCH / PUCCH of multiple TRPs.

[0242] The PUSCH / PUCCH of multiple TRPs may also be the PUSCH / PUCCH for repeated transmission set with multiple TRPs.

[0243] Below, the various embodiments of the present disclosure can also be applied to CSI-RS / SRS of single / multi-TRP.

[0244] <First embodiment>

[0245] In the first embodiment, switching between the Rel. 17 unified TCI state and the Rel. 18 unified TCI state is described.

[0246] The UE may also use RRC signaling to switch between the Rel.17 unified TCI state and the Rel.18 unified TCI state. The UE may also use RRC signaling to determine the switch between the Rel.17 unified TCI state and the Rel.18 unified TCI state.

[0247] For example, when a specific RRC parameter is configured, the UE may assume / judge that the Rel.18 TCI state is configured / applied.

[0248] For example, the UE may assume / judge that the Rel.17 TCI state is configured / applied without configuring the specific RRC parameters.

[0249] In addition, for example, the UE may assume / judge that the TCI state specified in Rel. 15 is set / applied without setting the specific RRC parameter. The TCI state specified in Rel. 15 may also mean a TCI state that is not a unified TCI state and does not set multiple TRPs.

[0250] The specific RRC parameter may also be a new RRC parameter specified in Rel.18.

[0251] The specific RRC parameter may be one or more existing RRC parameters (or a combination of RRC parameters) (specified in Rel.17).

[0252] For example, the UE may also assume / determine that the Rel.18 TCI state is set / applied when at least one of the following parameters is set:

[0253] ・Unify the setting parameters of TCI state (for example, parameters of DL or joint TCI state (DLorJointTCIState) / parameters of UL TCI state (UL-TCIState)).

[0254] ・Multiple TRP setting parameters.

[0255] In the present disclosure, the configuration parameters of multiple TRPs may be, for example, a CORESET pool index (CORESETPoolIndex) (of multiple different values). In addition, the configuration parameters of multiple TRPs may also be mutually rewritten with the presence of an SRS resource set indicator field, the presence of a second TPMI / SRI / TPC command field, the association of multiple TCI states with one DCI code point, and the use of RRC / MAC CE / DCI to indicate / set multiple unified TCI states.

[0256] The size of the DCI format when a unified TCI state for multiple TRPs is set may be different from the size of the DCI format when a unified TCI state for multiple TRPs is not set.

[0257] For example, the size of the DCI format when a unified TCI state for multiple TRPs is set may be smaller than the size of the DCI format when a unified TCI state for multiple TRPs is not set. In this case, the DCI overhead can be reduced.

[0258] Figure 5 FIG. 1 is a diagram showing an example of a DCI size according to the first embodiment. Figure 5 In the example shown, the DCI format when a unified TCI state for multiple TRPs is set includes DCI fields #1 to #4, and the DCI format when a unified TCI state for multiple TRPs is not set includes DCI fields #1 to #3, but does not include DCI field #4 (DCI field #4 is not used).

[0259] In addition, fields not included in the DCI format when a unified TCI state for multiple TRPs is set (for example, Figure 5 DCI field #4) in can also be 1 or more fields.

[0260] Fields not included in the DCI format when a unified TCI state for multiple TRPs is set (for example, Figure 5 DCI field #4 in the DCI format may also be, for example, a field used (only) for a unified TCI state for multiple TRPs. This field may also be, for example, a field included in a specific DCI format (e.g., DCI format 0_1 / 0_2 / 1_1 / 1_2) and used for switching between single TRP and multiple TRPs.

[0261] Fields not included in the DCI format when a unified TCI state for multiple TRPs is set (for example, Figure 5 The DCI field #4 in the DCI format may be, for example, at least one of an SRS resource set indicator field and a second TPMI / SRI / TPC command field included in a specific DCI format (eg, DCI format 0_1 / 0_2).

[0262] According to the above first embodiment, it is possible to use RRC signaling to appropriately set a unified TCI state utilizing multiple TRPs.

[0263] <Second embodiment>

[0264] In the second embodiment, switching between the Rel. 17 unified TCI state and the Rel. 18 unified TCI state is described.

[0265] Switching method

[0266] The UE can also use RRC signaling to set a unified TCI state (related parameters) for multiple TRPs.

[0267] Next, the UE may also use MAC CE to switch between the Rel.17 unified TCI state and the Rel.18 unified TCI state. The UE may also use MAC CE to determine the switch between the Rel.17 unified TCI state and the Rel.18 unified TCI state.

[0268] In the case of single / multiple DCI, when multiple (for example, 2) TCI states are activated through MAC CE for a code point of at least one TCI field, the UE may also assume / judge that the Rel.18 TCI state is set / applied / activated / indicated.

[0269] In the case of multiple DCIs (for example, when multiple CORESET pool indexes with different values ​​are set), when multiple (for example, 2) TCI states are activated through MAC CE for each CORESET pool index, the UE can also assume / judge that the Rel.18TCI state is set / applied / activated / indicated.

[0270] In addition, when a CORESET pool index (CORESET pool indexes of multiple different values) is activated based on at least one method described in the third embodiment described below, the UE may also assume / judge that the Rel.18 TCI state is set / applied / activated / indicated.

[0271] In this embodiment, the setting of a unified TCI state for multiple TRPs using RRC signaling may also mean the setting of a unified TCI state for multiple TRPs described in the above-mentioned first embodiment.

[0272] In cases other than the above-mentioned case where the UE assumes / judges that the Rel.18 TCI state is set / applied / activated / indicated, the UE may also assume / judge that the Rel.17 TCI state is set / applied / activated / indicated.

[0273] The size of the DCI format when a unified TCI state for multiple TRPs is set / activated / indicated may be the same as the size of the DCI format when a unified TCI state for multiple TRPs is not set / activated / indicated. In this case, there is no need to change the DCI size by activating the MAC CE, which can reduce the number / load of blind detections of DCI / PDCCH based on the UE.

[0274] The DCI field included in the DCI format when a unified TCI state for multiple TRPs is set and multiple TCI states are activated, and the DCI field not used in the DCI format when a unified TCI state for multiple TRPs is set and multiple TCI states are not activated, can also be processed as reserved bits. In other words, the UE can also ignore the DCI field.

[0275] In addition, the DCI field may also be used for other purposes. For example, the DCI field may also be used as a field indicating the resource / TCI status of a scheduled channel (eg, PDSCH / PUSCH).

[0276] Figure 6 FIG. 1 is a diagram showing an example of a DCI size according to the second embodiment. Figure 6 In the example shown, the DCI format (first DCI format) in which a unified TCI state for multiple TRPs is set and multiple TCI states are activated includes DCI fields #1 to #4. The DCI format (second DCI format) in which a unified TCI state for multiple TRPs is set and multiple TCI states are not activated includes DCI fields #1 to #4, but the value of DCI field #4 is processed as a reserved bit.

[0277] In addition, the DCI field processed as the above-mentioned reserved bit may be common to at least one of the fields not included in the DCI format when the unified TCI state for multiple TRPs in the above-mentioned first embodiment is set.

[0278] In addition, in the present disclosure, 1 TCI state may also mean at least one of 1 joint TCI state, 1 DL TCI state, and 1 UL TCI state. In addition, in the present disclosure, multiple TCI states may also mean at least one of multiple joint TCI states, multiple DL TCI states, and multiple UL TCI states.

[0279] In addition, the size of the DCI format when the unified TCI state for multiple TRPs is set / activated / indicated may be different from the size of the DCI format when the unified TCI state for multiple TRPs is not set / activated / indicated. In other words, the size of the DCI may also be changed by the MAC CE used to switch between the Rel.17 unified TCI state and the Rel.18 unified TCI state.

[0280] For example, the size of the DCI format when a unified TCI state for multiple TRPs is set may be smaller than the size of the DCI format when a unified TCI state for multiple TRPs is not set. In this case, the DCI overhead can be reduced.

[0281] Figure 7 FIG. 4 is a diagram showing another example of the DCI size involved in the second embodiment. Figure 7 In the example shown, the DCI format in the case where a unified TCI state for multiple TRPs is set and multiple TCI states are activated includes DCI fields #1 to #4. The DCI format in the case where a unified TCI state for multiple TRPs is set and multiple TCI states are not activated includes DCI fields #1 to #3, excluding DCI field #4 (DCI field #4 is not used).

[0282] In addition, when a unified TCI state for multiple TRPs is set and multiple TCI states are activated, the fields not included in the DCI format (for example, Figure 7 DCI field #4 in the DCI format may be common to at least one of the fields not included in the DCI format when the unified TCI state for multiple TRPs in the first embodiment described above is set.

[0283] 《Activated / Indicated TCI Status》

[0284] The following describes a combination of TCI states that are activated through MAC CE and indicated through DCI.

[0285] In DL reception / UL transmission, for one CC / BWP or a plurality of CC / BWPs (a set of CC / BWPs), at least one of the following combinations of TCI states may also be indicated:

[0286] [Combined DL / UL TCI status]

[0287] ・1st joint TCI status, 2nd joint TCI status.

[0288] [Independent DL / UL TCI status]

[0289] ・1st DL TCI state, 1st UL TCI state, 2nd DL TCI state, 2nd UL TCI state.

[0290] ・1st DL TCI state, 1st UL TCI state, 2nd DL TCI state.

[0291] ・1st DL TCI state, 1st UL TCI state, 2nd UL TCI state.

[0292] ・1st DL TCI state, 2nd DL TCI state, 2nd UL TCI state.

[0293] ・1st UL TCI state, 2nd DL TCI state, 3rd UL TCI state.

[0294] ・1st DL TCI status, 2nd DL TCI status.

[0295] ・1st UL TCI state, 2nd UL TCI state.

[0296] In addition, similar to Rel. 17, it is also possible to support that one joint TCI state is indicated in the unified TCI state frame. In addition, similar to Rel. 17, it is also possible to support that one pair of DL TCI state and UL TCI state is indicated in the unified TCI state frame.

[0297] In addition, the above combination is described as a joint TCI state and an independent TCI state, but the above combination is only an example. For example, the joint TCI state and the independent (DL / UL) TCI state may be associated with a code point of one TCI field.

[0298] In other words, it is also possible to support the setting of the joint TCI state and the setting of the independent TCI state to be set to the UE at the same time. The UE may also report the UE capability information supporting this function to the network (eg, base station).

[0299] The UE may also determine / update / change the TCI status based on the above indicated combination.

[0300] The UE may also determine that the indicated TCI state is to be applied. At this time, for the TCI state not included in the indicated combination, the UE may also maintain the TCI state applied before the indication is made.

[0301] For example, a combination of the 1st DL TCI state, the 1st UL TCI state, and the 2nd DL TCI state is indicated to the UE. In this case, the UE may also determine that the indicated TCI state is updated, and for the TCI state that is not indicated (in this case, the 2nd UL TCI state), the TCI state applied before the indication is made is used.

[0302] The UE may also determine that the indicated TCI state is to be applied. At this time, for the TCI state not included in the indicated combination, the UE may also determine to discard the TCI state applied before the indication is made.

[0303] For example, a combination of the 1st DL TCI state, the 1st UL TCI state, and the 2nd DL TCI state is indicated to the UE. In this case, the UE may also determine to update the indicated TCI state and discard the TCI state applied before the indication is made for the TCI state that is not indicated (in this case, the 2nd UL TCI state).

[0304] For a TCI state that is not indicated, the UE may also determine to maintain / discard a specific TCI state.

[0305] For example, for a TCI state that is not indicated, the UE may also determine to maintain (or discard) the first TCI state.

[0306] For example, for a TCI state that is not indicated, the UE may also determine to discard (or maintain) the second TCI state.

[0307] For the TCI state that is not indicated, the UE may also determine to maintain / discard the TCI state corresponding to the specific TRP.

[0308] For example, for a TCI state that is not indicated, the UE may also determine to maintain (or discard) the TCI state corresponding to the first TRP.

[0309] For example, for a TCI state that is not indicated, the UE may also determine to discard (or maintain) the TCI state corresponding to the second TRP.

[0310] In addition, the present embodiment can also be applied (only) to the case of multiple TRPs based on a single DCI. In addition, the present embodiment can also be applied to the case of multiple TRPs based on multiple DCIs.

[0311] 《Correlation between TCI field code points and TCI status》

[0312] [Multiple TRPs based on a single DCI]

[0313] Figure 8 FIG. 1 is a diagram showing an example of the association between the code point of the TCI field and the TCI state involved in the second embodiment. Figure 8 In the description, for each of the combined TCI state and the independent TCI state, the case where one TCI state is associated with a code point of one TCI field and the case where multiple TCI states are associated with a code point of one TCI field are recorded.

[0314] exist Figure 8 In the example shown, when one TCI state is associated with a code point of one TCI field, a MAC CE for activating the Rel.17 TCI state may also be utilized. In addition, when multiple TCI states are associated with a code point of one TCI field, a MAC CE for activating the Rel.18 TCI state may also be utilized.

[0315] For example, the UE may use MAC CE to switch between a case where one joint TCI state is associated with one code point of the TCI field and a case where multiple joint TCI states are associated with one code point of the TCI field.

[0316] For example, the UE may use MAC CE to switch between a case where one independent (DL / UL) TCI state is associated with a code point in a TCI field and a case where multiple independent (DL / UL) TCI states are associated with a code point in a TCI field.

[0317] For example, the UE may also use MAC CE to switch between a case where one joint TCI state is associated with one code point of the TCI field and a case where multiple independent (DL / UL) TCI states are associated with one code point of the TCI field.

[0318] For example, the UE may also use MAC CE to switch between a case where one independent (DL / UL) TCI state is associated with a code point in the TCI field and a case where multiple joint TCI states are associated with a code point in the TCI field.

[0319] in addition, Figure 8 The handover shown may also be performed using RRC / MAC CE.

[0320] Regarding at least one (or, all) TCI states activated by the MAC CE (for Rel.18), one TCI state may be associated with a code point of one TCI field. In addition, regarding at least one (or, all) TCI states activated by the MAC CE (for Rel.18), multiple (for example, 2) TCI states associated with a code point of one TCI field may also have the same TCI state ID.

[0321] In this case, the UE may also perform the operation in the case where one TCI state is indicated in this embodiment. Alternatively, in this case, the UE may also perform the operation in the case where multiple TCI states are indicated in this embodiment.

[0322] Fig. 9 This is a diagram showing another example of the association between the code point of the TCI field involved in the second embodiment and the TCI status. Fig. 9 Indicates the situation where the joint TCI state is indicated.

[0323] like Fig. 9 As shown, when the TCI state in which one combined TCI state is associated with all TCI code points is activated using the MAC CE defined up to Rel.17, the UE performs the operation defined in Rel.17.

[0324] In addition, if Fig. 9 As shown, when the TCI state in which multiple (2) joint TCI states are associated with TCI code points using the MAC CE specified in Rel.18 is activated, the UE performs the actions specified in Rel.18 (actions related to the unified TCI state in multiple TRPs).

[0325] In addition, if Fig. 9 As shown, when the TCI state associated with one joint TCI state for all TCI code points is activated using the MAC CE specified in Rel.18, the UE performs the actions specified up to Rel.17, or the actions specified in Rel.18 (actions related to the unified TCI state in multiple TRPs).

[0326] in addition, Fig. 9 The example shown is a description related to the joint TCI state, but it is also applicable to the independent (DL / UL) TCI state.

[0327] [Multiple TRPs based on multiple DCIs]

[0328] Fig.10 FIG. 1 is a diagram showing another example of the association between the code point of the TCI field and the TCI state involved in the second embodiment. Fig.10 In the document, for each of the combined TCI state and the independent TCI state, the case where a code point of a TCI field corresponding to a Rel.17 action is associated with a TCI state and the case where a code point of a TCI field corresponding to a Rel.18 action is associated with a TCI state are recorded.

[0329] The so-called Rel.17 action may also refer to the case of using a single TRP. The so-called Rel.18 action may also refer to the case of using multiple TRPs (based on multiple DCIs).

[0330] exist Fig.10 In the example shown, the association between the code point of the TCI field corresponding to the Rel.18 action and the TCI state can also be set / activated / specified for each index (CORESET pool index) associated with the TRP.

[0331] exist Fig.10 In the example shown, when a code point of a TCI field corresponding to a Rel.17 action is associated with a TCI state, a MAC CE for activating the Rel.17 TCI state may be used. In addition, when a code point of a TCI field corresponding to a Rel.18 action is associated with a TCI state, a MAC CE for activating the Rel.18 TCI state may be used.

[0332] For example, the UE may use MAC CE to switch between a situation where a code point of a TCI field corresponding to a Rel.17 action is associated with a TCI state and a situation where a code point of a TCI field corresponding to a Rel.18 action is associated with a TCI state.

[0333] For example, the UE may use MAC CE to switch between a situation where a code point of a TCI field corresponding to a Rel.17 action is associated with a joint TCI state and a situation where a code point of a TCI field corresponding to a Rel.18 action is associated with a joint TCI state.

[0334] For example, the UE may use MAC CE to switch between a situation where a code point of a TCI field corresponding to a Rel.17 action is associated with an independent (DL / UL) TCI state and a situation where a code point of a TCI field corresponding to a Rel.18 action is associated with an independent (DL / UL) TCI state.

[0335] For example, the UE may use MAC CE to switch between a situation where a code point of a TCI field corresponding to a Rel.17 action is associated with a joint TCI state and a situation where a code point of a TCI field corresponding to a Rel.18 action is associated with an independent (DL / UL) TCI state.

[0336] For example, the UE may use MAC CE to switch between a situation where a code point of a TCI field corresponding to a Rel.17 action is associated with an independent (DL / UL) TCI state and a situation where a code point of a TCI field corresponding to a Rel.18 action is associated with a joint TCI state.

[0337] in addition, Fig.10 The handover shown may also be performed using RRC / MAC CE.

[0338] According to the above second embodiment, it is possible to use MAC CE to appropriately activate the unified TCI state utilizing multiple TRPs.

[0339] <Third embodiment>

[0340] In the third embodiment, switching between multi-TRP, single TRP and multi-TRP based on multi-DCI is described.

[0341] RRC signaling may also be used to set an index related to the TRP (eg, a CORESET pool index) to the UE. The index may also be an index having multiple (eg, 2) different values.

[0342] MAC CE may also be used to activate / update the index for the UE.

[0343] In the case where activation / update of the index is not performed, the UE may also assume / judge that the index is not set. In other words, in the case where activation / update of the index is not performed, the UE may also assume / judge that a single TRP is set (it may also fall back to a single TRP action).

[0344] Fig.11 FIG. 1 is a diagram showing an example of a method for setting / activating / updating an index related to TRP according to the third embodiment. Fig.11 In the example shown, first, CORESET #0 to #2 corresponding to the value of the CORESET pool index of 0 and CORESET #3 and #4 corresponding to the value of the CORESET pool index of 1 are configured for the UE.

[0345] Next, the UE activates the CORESET pool index corresponding to each of CORESET#0 to #4 through MAC CE. Furthermore, the UE updates (activates) the CORESET pool index corresponding to CORESET#0, #2, and #3 through MAC CE.

[0346] The following describes the MAC CE used to activate / update the index associated with the above-mentioned TRP.

[0347] The MAC CE may also be a new MAC CE specified in Rel.18 or later.

[0348] Fig. 12A FIG. 1 is a diagram showing an example of a MAC CE according to the third embodiment. Fig. 12A The MAC CE shown includes a field indicating a serving cell ID, a field indicating a CORESET ID, and 7 specific fields (which may also be Fig. 12A In addition, the number of specific fields (in Fig. 12A The number of 7 in the figure is just an example and is not limited to this number.

[0349] The UE may also determine the value of the specified field based on the specific number (in Fig. 12A The UE determines the activation / update of the index related to the TRP based on the value represented by a specific field (5 in the example). For example, when a specific field represents the first value (for example, 0), the UE can also determine that the index related to the TRP corresponding to the field is not activated / updated.

[0350] For example, when a specific field represents the first value (for example, 0), the UE may also determine that the index associated with the TRP corresponding to the field is deactivated.

[0351] The UE may also determine the activation / update of the index associated with the TRP based on the value represented by the specific field. For example, when the specific field represents the second value (e.g., 1), the UE may also determine that the index associated with the TRP corresponding to the field is activated / updated.

[0352] In the case where it is determined that the index associated with the TRP corresponding to the field is updated, the UE may also determine that the value of the index associated with the corresponding TRP is changed.

[0353] One MAC CE may also be used to activate / update indexes (eg, CORESET pool indexes) associated with multiple TRPs for multiple CORESETs. In this case, multiple specific fields may also be represented as bitmaps corresponding to each CORESET.

[0354] In addition, the MAC CE for activating / updating the index related to the TRP may also be a specific MAC CE. The specific MAC CE may be, for example, a new MAC CE (specified in Rel.18 and later), an existing MAC CE (specified up to Rel.17), or an expanded MAC CE of the existing MAC CE (specified up to Rel.17).

[0355] For example, the existing MAC CE (specified up to Rel. 17) or the MAC CE after the existing MAC CE (specified up to Rel. 17) is extended may be a MAC CE for activating / deactivating the (unified) TCI state, including a field related to an index related to the TRP.

[0356] Fig. 12B This is a diagram showing another example of the MAC CE involved in the third embodiment. Fig. 12B The MAC CE shown is the MAC CE used for activation / deactivation of the above-mentioned unified TCI state.

[0357] exist Fig. 12B In the examples described, the specific number (in Fig. 12B A reserved bit field (5 in total) (hereinafter, also referred to as a specific field) is used for activation / update of indexes related to TRP.

[0358] The UE may also determine the activation / update of the index related to the TRP based on the value represented by the specific field. For example, when the specific field represents the first value (for example, 0), the UE may also determine that the index related to the TRP corresponding to the field is not activated / updated.

[0359] For example, when a specific field represents the first value (for example, 0), the UE may also determine that the index associated with the TRP corresponding to the field is deactivated.

[0360] The UE may also determine the activation / update of the index associated with the TRP based on the value represented by the specific field. For example, when the specific field represents the second value (e.g., 1), the UE may also determine that the index associated with the TRP corresponding to the field is activated / updated.

[0361] In the case where it is determined that the index associated with the TRP corresponding to the field is updated, the UE may also determine that the value of the index associated with the corresponding TRP is changed.

[0362] One MAC CE may also be used to activate / update indexes (eg, CORESET pool indexes) associated with multiple TRPs for multiple CORESETs. In this case, multiple specific fields may also be represented as bitmaps corresponding to each CORESET.

[0363] According to the third embodiment described above, even when a unified TCI state utilizing multiple TRPs is applied, multiple TRP actions based on multiple DCIs can be appropriately performed.

[0364] <Fourth embodiment>

[0365] In the fourth embodiment, activation / deactivation of MAC CE in a unified TCI state using multiple TRPs is described.

[0366] The UE may also activate / deactivate the unified TCI state using at least one MAC CE described in the following implementations 4-1 to 4-3.

[0367] 《Implementation Method 4-1》

[0368] The MAC CE of implementation mode 4-1 can also be used in at least one of multiple TRPs based on a single DCI and multiple TRPs based on multiple DCIs.

[0369] The UE can also use the unified TCI state specified up to Rel.17 to activate / deactivate the MAC CE after the MAC CE is extended, and the unified TCI state using multiple TRPs can be activated / deactivated (refer to Fig.13 ).

[0370] The MAC CE may also include a field (“Pi” (i is an integer greater than or equal to 1)) indicating whether the code point of the i-th TCI field includes the second TCI state.

[0371] For example, when the Pi field indicates the first value (eg, 0), it may indicate that the corresponding TCI code point does not include the second TCI state (or the corresponding TCI code point indicates only one DL / Joint or UL TCI state).

[0372] For example, when the Pi field indicates the second value (eg, 1), it may indicate that the corresponding TCI code point includes the second TCI state.

[0373] The MAC CE may also include a field (“Qi” (i is an integer greater than or equal to 1)) indicating whether the code point of the i-th TCI field includes the third TCI state.

[0374] For example, when the Qi field indicates the first value (eg, 0), it may indicate that the corresponding TCI code point does not include the third TCI state (or the corresponding TCI code point indicates two (first and second) DL / Joint or UL TCI states).

[0375] For example, when the Qi field indicates the second value (eg, 1), it may indicate that the corresponding TCI code point includes the third TCI state.

[0376] The MAC CE may also include: a field ("Si" (i is an integer greater than or equal to 1)) indicating whether the code point of the i-th TCI field includes the 4th TCI state.

[0377] For example, when the Si field indicates the first value (eg, 0), it may indicate that the corresponding TCI code point does not include the 4th TCI state (or the corresponding TCI code point indicates 3 (1st-3rd) DL / Joint or UL TCI states).

[0378] For example, when the Si field indicates the second value (eg, 1), it may indicate that the corresponding TCI code point includes the fourth TCI state.

[0379] When any Pi field does not represent the second value (for example, 1), the Qi field and the Si field may not exist in the MAC CE (or may be absent). When any Qi field does not represent the second value (for example, 1), the Si field may not exist in the MAC CE (or may be absent).

[0380] It can also be that when the 1st TCI state, the 2nd TCI state, the 3rd TCI state, and the 4th TCI state correspond to DL (or combined), UL, DL (or combined), and UL, respectively, the 1st TCI state, the 2nd TCI state, the 3rd TCI state, and the 4th TCI state correspond to the 1st DL / combined TCI state, the 1st UL TCI state, the 2nd DL / combined TCI state, and the 2nd UL TCI state, respectively.

[0381] It can also be that when the 1st TCI state, the 2nd TCI state, and the 3rd TCI state correspond to DL (or combined), UL, and UL, respectively, the 1st TCI state, the 2nd TCI state, and the 3rd TCI state correspond to the 1st DL / combined TCI state, the 1st UL TCI state, and the 2nd UL TCI state, respectively.

[0382] It can also be that when the 1st TCI state, the 2nd TCI state, and the 3rd TCI state correspond to DL (or combined), DL (or combined), and UL, respectively, the 1st TCI state, the 2nd TCI state, and the 3rd TCI state correspond to the 1st DL / combined TCI state, the 2nd DL / combined TCI state, and the 2nd UL TCI state, respectively.

[0383] For example, when two TCI states are indicated and the two TCI states represent DL and UL respectively, it is impossible to determine whether the two TCI states represent the first DL TCI state and the first UL TCI state respectively, or the second DL TCI state and the second UL TCI state respectively.

[0384] Therefore, in Fig.13 The MAC CE shown may further include: a field indicating the number of the first (or second) TCI states for each code point of the TCI field ("Ti" field (i is an integer greater than 1)) (refer to Fig.14 ).

[0385] The UE may also determine the number of the first (or second) TCI states of each code point of the corresponding TCI field based on the value of Ti.

[0386] For example, for the code point of the i-th TCI field, when Ti is the first value (for example, 0), the UE may also determine that the number of the first (or second) TCI states for each code point of the TCI field is 1 (or 2).

[0387] For example, for the code point of the i-th TCI field, when Ti is the second value (for example, 1), the UE may also determine that the number of the first (or second) TCI states for each code point of the TCI field is 2 (or 1).

[0388] In addition, the position of the Ti field in the MAC CE is not limited to Fig.14 For example, the Ti field may be arranged in an octet that is higher in the order (with a smaller index) than the octet of the Pi field.

[0389] Furthermore, for example, when one TCI state is indicated and the one TCI state indicates DL (or UL), it is impossible to determine whether the one TCI state indicates the first DL (UL) TCI state or the second DL (UL) TCI state.

[0390] Therefore, when one TCI state is indicated in the MAC CE, the UE may determine the one TCI state as the first TCI state.

[0391] also, Figure 4 / Fig.13 / Fig.14 The recorded MAC CE may also be supplemented with a field / octet indicating whether the TCI state when one TCI state is indicated is the first TCI state or the second TCI state. The UE may also determine whether the TCI state when one TCI state is indicated is the first TCI state or the second TCI state based on this field.

[0392] [Variation of Implementation 4-1]

[0393] The MAC CE of implementation mode 4-1 can also be used in at least one of multiple TRPs based on a single DCI and multiple TRPs based on multiple DCIs.

[0394] The UE can also use the unified TCI state specified up to Rel.17 to activate / deactivate the MAC CE after the MAC CE is extended, and the unified TCI state using multiple TRPs can be activated / deactivated (refer to Fig.15 ).

[0395] The MAC CE may also include a field (“Pi” (i is an integer greater than or equal to 1)) indicating which first (joint / DL / UL) TCI state is included in the code point of the i-th TCI field.

[0396] For example, when the Pi field indicates the first value (for example, 0), it may indicate that the corresponding TCI code point includes the first DL / Joint (or UL) TCI state.

[0397] For example, when the Pi field indicates the second value (eg, 1), it may indicate that the corresponding TCI code point includes the first DL / joint TCI state and the first UL TCI state.

[0398] Furthermore, the MAC CE may include a field (“Qi” (i is an integer greater than or equal to 1)) indicating which second (joint / DL / UL) TCI state is included in the code point of the i-th TCI field.

[0399] For example, when the Qi field indicates the first value (eg, 0), it may indicate that the corresponding TCI code point includes (only) the second DL / Joint (or UL) TCI state.

[0400] For example, when the Qi field indicates the second value (eg, 1), it may indicate that the corresponding TCI code point includes the second DL / joint TCI state and the second UL TCI state.

[0401] In addition, Fig.15 The MAC CE shown may also be supplemented with a field indicating whether the TCI state corresponding to the code point of the TCI field is the first TCI state or the second TCI state. The field may also be a specific number of bits (e.g., 8). The field may also correspond to the code point of the i-th TCI field.

[0402] When the field indicates the first value (for example, 0 (or 1)), the UE may determine that the code point of the TCI field corresponding to the field indicates only the first TCI state.

[0403] When this field indicates the first value (for example, 0 (or 1)), the UE may ignore the value of the corresponding Qi field.

[0404] When the field indicates the second value (for example, 1 (or 0)), the UE may determine that the code point of the TCI field corresponding to the field indicates only the second TCI state.

[0405] When this field indicates the second value (for example, 1 (or 0)), the UE may ignore the value of the corresponding Pi field.

[0406] In addition, Fig.15 The MAC CE shown may also be supplemented with: a field indicating whether the TCI state corresponding to the code point of the TCI field is the 1st (or 2nd) TCI state, or the 1st TCI state and the 2nd TCI state. The field may also be a specific number of bits (e.g., 8). The field may also correspond to the code point of the i-th TCI field.

[0407] When the field indicates the first value (for example, 0 (or 1)), the UE may determine that the code point of the TCI field corresponding to the field indicates only the first (or second) TCI state.

[0408] When this field indicates the first value (for example, 0 (or 1)), the UE may ignore the value of the corresponding Qi (or Pi) field.

[0409] When the field indicates the second value (for example, 1 (or 0)), the UE may determine that the code point of the TCI field corresponding to the field indicates the first TCI state and the second TCI state.

[0410] In addition, Fig.15 In the MAC CE shown, a field indicating whether the TCI state corresponding to the code point of the TCI field is the first TCI state, the second TCI state, or the first TCI state and the second TCI state may also be added. The field may also be a specific number of bits (for example, 18). The field may also correspond to the code point of the i-th TCI field.

[0411] The UE may also determine, based on the value of this field, whether the TCI state corresponding to the code point of the TCI field is the first TCI state, the second TCI state, or both the first TCI state and the second TCI state.

[0412] Implementation Method 4-2

[0413] The MAC CE of implementation mode 4-2 can also be used for multiple TRPs based on multiple DCIs.

[0414] The UE can also use the unified TCI state specified up to Rel.17 to activate / deactivate the MAC CE after the MAC CE is extended, and the unified TCI state using multiple TRPs can be activated / deactivated (refer to Fig.16 ).

[0415] The MAC CE may also include a field indicating the CORESET pool ID (index).

[0416] When the field indicating the CORESET pool ID (index) included in the MAC CE indicates the first value (for example, 0), the UE may also determine to apply the MAC CE to a channel (for example, PDSCH / PUSCH) associated with the CORESET having the CORESET pool index of the first value.

[0417] When the field indicating the CORESET pool ID (index) included in the MAC CE indicates the second value (for example, 1), the UE may also determine to apply the MAC CE to the channel (for example, PDSCH / PUSCH) associated with the CORESET having the CORESET pool index of the second value.

[0418] 《Implementation Method 4-3》

[0419] The UE can also activate / deactivate MAC CE using the unified TCI state specified up to Rel.17, and activate / deactivate the unified TCI state using multiple TRPs.

[0420] At this time, the UE may also determine whether the TCI state indicated by the MAC CE is a joint TCI state or an independent TCI state based on the value indicated by the reserved bit included in the MAC CE. In this case, the UE may also use 1 reserved bit to make the determination.

[0421] For example, when the one reserved bit indicates the first value (for example, 0), the UE may also determine that the TCI state indicated by the MAC CE is a joint (or independent) TCI state.

[0422] For example, when the one reserved bit indicates the second value (eg, 1), the UE may determine that the TCI state indicated by the MAC CE is an independent (or joint) TCI state.

[0423] In addition, the UE may also determine whether the TCI state corresponding to the reserved bit (position) is a joint TCI state or an independent TCI state based on the value represented by the reserved bit included in the MAC CE. In this case, the UE may also use multiple (for example, 8) reserved bits to make the determination.

[0424] For example, when the reserved bit indicates the first value (eg, 0), the UE may also determine that the corresponding TCI state is a joint (or independent) TCI state.

[0425] For example, when the reserved bit indicates the second value (eg, 1), the UE may also determine that the corresponding TCI state is an independent (or, joint) TCI state.

[0426] According to the above fourth embodiment, it is possible to appropriately define a MAC CE for activating a unified TCI state when using multiple TRPs.

[0427] <Supplement>

[0428] [Notification of information to UE]

[0429] The notification of arbitrary information (from the network (NW)) (e.g., base station (BS))) to the UE (in other words, the reception of arbitrary information from the BS in the UE) in the above-mentioned embodiments may also be performed using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PDCCH, PDSCH, reference signals) or a combination thereof.

[0430] When the above notification is performed by MAC CE, the MAC CE may be identified by including a new logical channel ID (Logical Channel ID (LCID)) not specified in the existing specification in the MAC subheader.

[0431] In the case where the above notification is performed through DCI, the above notification may be performed through a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used in scrambling a cyclic redundancy check (CRC) bit assigned to the DCI, the format of the DCI, etc.

[0432] Furthermore, the notification of arbitrary information to the UE in the above-mentioned embodiments may be performed periodically, semi-continuously, or aperiodically.

[0433] [Notification of information from UE]

[0434] The notification of arbitrary information from the UE (to the NW) in the above-mentioned embodiment (in other words, the sending / reporting of arbitrary information from the UE to the BS) can also be carried out using physical layer signaling (e.g., UCI), high-layer signaling (e.g., RRC signaling, MACCE), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signals) or a combination thereof.

[0435] In the case where the above notification is performed via MAC CE, the MAC CE can also be identified by including a new LCID that is not specified in the existing specifications in the MAC subheader.

[0436] When the notification is performed through UCI, the notification may be transmitted using PUCCH or PUSCH.

[0437] In addition, the notification of arbitrary information from the UE in the above-mentioned embodiments may be performed periodically, semi-continuously, or aperiodically.

[0438] [About application of each embodiment]

[0439] At least one of the above-mentioned embodiments may also be applied to a case where a specific condition is satisfied. The specific condition may be specified in the specification or may be notified to the UE / BS using high-layer signaling / physical layer signaling.

[0440] At least one of the above-mentioned implementation modes may also be applied only to a UE that reports a specific UE capability (UE capability) or supports the specific UE capability.

[0441] The specific UE capability may also represent at least one of the following:

[0442] ・Support specific processing / actions / control / information for at least one of the above embodiments (e.g., unified TCI state using multiple TRPs);

[0443] ・Supports switching between Rel.17 unified TCI state and Rel.18 unified TCI state using RRC / MAC CE.

[0444] In addition, the above-mentioned specific UE capabilities can be capabilities that are applied across the entire frequency (commonly regardless of the frequency), or capabilities for each frequency (for example, one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), or capabilities for each frequency range (for example, frequency range 1 (Frequency Range 1 (FR1)), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities for each feature set (Feature Set (FS)) or feature set per component carrier (Feature Set Per Component-carrier (FSPC)).

[0445] Furthermore, the specific UE capability may be a capability applied across all duplex modes (common regardless of the duplex mode) or a capability for each duplex mode (eg, time division duplex (TDD) or frequency division duplex (FDD)).

[0446] In addition, at least one of the above-mentioned embodiments may also be applied to a case where the UE is set / activated / triggered with specific information associated with the above-mentioned embodiments (or an action to implement the above-mentioned embodiments) through high-layer signaling / physical layer signaling. For example, the specific information may also be information indicating activation of a unified TCI state using multiple TRPs, any RRC parameter for a specific version (e.g., Rel.18 / 19), etc.

[0447] The UE may also apply actions such as Rel.15 / 16 / 17 when it does not support at least one of the above-mentioned specific UE capabilities or is not configured with the above-mentioned specific information.

[0448] (Note A)

[0449] The following inventions are attached to one embodiment of the present disclosure.

[0450] [Appendix A-1]

[0451] Terminal, with:

[0452] a control unit that determines whether to use a first unified transmission configuration indication state (TCI) state that does not utilize a plurality of transmission reception points (TRPs) or a second unified TCI state that utilizes the plurality of TRPs; and

[0453] The sending and receiving unit uses the first unified TCI state to send and receive signals for a single TRP, or uses the second unified TCI state to send and receive signals for multiple TRPs to which a single downlink control information (DCI) is applied.

[0454] [Appendix A-2]

[0455] The terminal described in Note A-1,

[0456] The control unit makes the determination based on at least one of Radio Resource Control (RRC) signaling and Medium Access Control (MAC) control elements.

[0457] [Appendix A-3]

[0458] The terminal specified in Note A-1 or Note A-2,

[0459] The size of the DCI for scheduling a specific channel when the first unified TCI state is used is different from the size of the DCI for scheduling the specific channel when the second unified TCI state is used.

[0460] [Appendix A-4]

[0461] A terminal described in any one of Notes A-1 to A-3,

[0462] When it is determined that the second unified TCI state is used, a TCI state in which a plurality of TCI states are associated with a code point in one TCI field is activated.

[0463] (Note B)

[0464] The following inventions are attached to one embodiment of the present disclosure.

[0465] [Appendix B-1]

[0466] Terminal, with:

[0467] A control unit that determines whether to use a first unified transmission configuration indication state (TCI) state that is not favorable for a plurality of transmission reception points (TRPs) or a second unified TCI state that utilizes the plurality of TRPs; and

[0468] The sending and receiving unit uses the first unified TCI state to send and receive signals for a single TRP, or uses the second unified TCI state to send and receive signals for multiple TRPs set based on multiple downlink control information (DCI).

[0469] [Appendix B-2]

[0470] The terminal described in Note B-1,

[0471] The control unit makes the determination based on at least one of Radio Resource Control (RRC) signaling and Medium Access Control (MAC) control elements.

[0472] [Appendix B-3]

[0473] The terminal specified in Note B-1 or Note B-2,

[0474] The size of the DCI for scheduling a specific channel when the first unified TCI state is used is different from the size of the DCI for scheduling the specific channel when the second unified TCI state is used.

[0475] [Appendix B-4]

[0476] A terminal described in any one of Notes B-1 to B-3,

[0477] The transmitting and receiving unit receives at least one of a first medium access control (MAC) control element for activating a control resource pool index and a second medium access control (MAC) control element for updating the control resource pool index.

[0478] (Note C)

[0479] The following inventions are attached to one embodiment of the present disclosure.

[0480] [Note C-1]

[0481] Terminal, with:

[0482] a receiving unit receiving a Medium Access Control (MAC) control element for activating a unified Transmission Configuration Indication state (TCI) state using a plurality of Transmission Reception Points (TRPs); and

[0483] A control unit determines activation of the unified TCI state based on a specific field included in the MAC CE.

[0484] [Note C-2]

[0485] The terminal described in Note C-1,

[0486] The specific field is at least one of a field indicating whether the MAC CE includes both the first unified TCI state and the second unified TCI state, a field indicating whether the MAC CE includes the third unified TCI state, and a field indicating whether the MAC CE includes the fourth unified TCI state.

[0487] [Appendix C-3]

[0488] The terminal recorded in the inscription C-1 or C-2,

[0489] The MAC CE includes a field indicating the number of unified TCI states corresponding to one TCI code point.

[0490] [Appendix C-4]

[0491] A terminal described in any of the items C-1 to C-3,

[0492] The specific field is a field for controlling a resource set ID.

[0493] (Wireless Communication System)

[0494] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using any one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0495] Fig.171 is a diagram showing an example of a schematic structure of a wireless communication system according to an embodiment. The wireless communication system 1 (may also be simply referred to as the system 1) may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5GNR), or the like.

[0496] In addition, the wireless communication system 1 may also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC may also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (E-UTRA-NR Dual Connectivity (EN-DC))), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

[0497] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0498] The wireless communication system 1 may also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0499] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as base stations 10.

[0500] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0501] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz)). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to this. For example, FR1 may also correspond to a frequency band higher than FR2.

[0502] 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.

[0503] Multiple base stations 10 may also be connected by wire (e.g., optical fiber based on Common Public Radio Interface (CPRI), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station (relay) may also be referred to as an IAB node.

[0504] The base station 10 may be connected to the core network 30 via other base stations 10 or directly. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0505] The core network 30 may also include, for example, user plane functions (User Plane Function (UPF)), access and mobility management function (Access and Mobility management Function (AMF)), session management function (Session Management Function (SMF)), unified data management (Unified Data Management (UDM)), application function (Application Function (AF)), data network (Data Network (DN)), location management function (Location Management Function (LMF)), conservative operation management (Operation, Administration and Maintenance (Management) (OAM): operation maintenance management) and other network functions (Network Functions (NF)). In addition, multiple functions may be provided by one network node. In addition, communication with an external network (for example, the Internet) may also be carried out via the DN.

[0506] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0507] In the wireless communication system 1, a wireless access method based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. may be used.

[0508] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the radio access schemes for UL and DL.

[0509] In the wireless communication system 1, as downlink channels, 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. can also be used.

[0510] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. can also be used as an uplink channel.

[0511] The PDSCH transmits user data, high-layer control information, and system information blocks (SIB). The PUSCH also transmits user data, high-layer control information, and the like. In addition, the PBCH also transmits the master information block (MIB).

[0512] The PDCCH may also transmit lower layer control information. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0513] In addition, the DCI for scheduling the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be rewritten as DL data, and the PUSCH may also be rewritten as UL data.

[0514] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space setting.

[0515] A search space may also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be rewritten mutually.

[0516] Through PUCCH, uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) can also be transmitted. Through PRACH, random access preambles for establishing a connection with a cell can also be transmitted.

[0517] In the present disclosure, downlink, uplink, etc. may be expressed without “link.” In addition, various channels may be expressed without “Physical” at the beginning.

[0518] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (CSI-RS), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted as DL-RS.

[0519] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SS Block (SSB)), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0520] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. may also be transmitted. In addition, DMRS may also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0521] (Base Station)

[0522] Fig.18 1 is a diagram showing an example of a structure of a base station involved in one embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may each be provided with more than one.

[0523] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0524] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0525] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of wireless resources, etc.

[0526] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are explained based on the common knowledge in the technical field involved in the present disclosure.

[0527] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0528] The transmitting / receiving antenna 130 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0529] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0530] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0531] The sending and receiving unit 120 (sending processing unit 1211), for example, may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 110, to generate a bit string to be sent.

[0532] The transmitting and receiving unit 120 (transmitting processing unit 1211) may also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output a baseband signal.

[0533] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0534] On the other hand, the transmission and reception unit 120 (RF unit 122 ) may also perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmission and reception antenna 130 .

[0535] The transmitting and receiving unit 120 (receiving processing unit 1212) may also apply receiving processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to obtain user data, etc.

[0536] The transmitting and receiving unit 120 (the measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (RSRP)), received quality (e.g., reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR), signal to noise ratio (SNR)), signal strength (e.g., received signal strength indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0537] The transmission path interface 140 can also send and receive signals (return signaling) between devices included in the core network 30 (for example, a network node providing NF), other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0538] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission and reception unit 120 , the transmission and reception antenna 130 , and the transmission path interface 140 .

[0539] The control unit 110 may also indicate whether to use a first unified transmission configuration indication (TCI) state (Rel. 17 unified TCI state) that does not utilize multiple transmission and reception points (TRPs) or a second unified TCI state (Rel. 18 TCI unified state) that utilizes the multiple TRPs. The transmitting and receiving unit 120 may also utilize the first unified TCI state to transmit and receive signals for a single TRP, or utilize the second unified TCI state to transmit and receive signals for multiple TRPs (multiple TRPs based on a single TRP) that are configured based on a single downlink control information (DCI) (first and second embodiments).

[0540] The control unit 110 may also indicate whether to use a first unified transmission configuration indication (TCI) state (Rel. 17 unified TCI state) that does not utilize multiple transmission and reception points (TRPs) or a second unified TCI state (Rel. 18 unified TCI state) that utilizes the multiple TRPs. The transmitting and receiving unit 120 may also utilize the first unified TCI state to transmit and receive signals for a single TRP, or utilize the second unified TCI state to transmit and receive signals for multiple TRPs (multi-TRPs based on multiple DCIs) that are configured based on multiple downlink control information (DCIs) (first and second embodiments).

[0541] The transmitting and receiving unit 120 may also transmit a medium access control (MAC) control element for activating a unified transmission configuration indication state (TCI) state using multiple transmission and reception points (TRPs). The control unit 110 may also use a specific field included in the MAC CE to indicate the activation of the unified TCI state (fourth embodiment).

[0542] (User terminal)

[0543] Fig.19 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. In addition, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided with one or more.

[0544] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0545] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0546] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 220.

[0547] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0548] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0549] The transmitting / receiving antenna 230 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0550] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0551] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0552] The sending and receiving unit 220 (sending processing unit 2211) may also perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0553] The transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output a baseband signal.

[0554] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is valid (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0555] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0556] On the other hand, the transmission and reception unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmission and reception antenna 230 .

[0557] The sending and receiving unit 220 (receiving processing unit 2212) can also apply receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0558] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurement, CSI measurement, etc. based on the received signal. The measuring unit 223 may also measure the received power (e.g., RSRP), the received quality (e.g., RSRQ, SINR, SNR), the signal strength (e.g., RSSI), the propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0559] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0560] The control unit 210 may also determine whether to use the first unified transmission configuration indication state (TCI) state (Rel. 17 unified TCI state) that does not utilize multiple transmission and reception points (TRPs) or the second unified TCI state (Rel. 18 unified TCI state) that utilizes the multiple TRPs. The transmitting and receiving unit 220 may also utilize the first unified TCI state to transmit and receive signals for a single TRP, or utilize the second unified TCI state to transmit and receive signals for multiple TRPs to which a single downlink control information (DCI) is applied (first and second embodiments).

[0561] The control unit 210 may perform the above determination based on at least one of Radio Resource Control (RRC) signaling and Medium Access Control (MAC) control elements (first and second embodiments).

[0562] The size of the DCI for scheduling a specific channel when the first unified TCI state is used and the size of the DCI for scheduling the specific channel when the second unified TCI state is used may be different or common (first and second embodiments).

[0563] When the control unit 210 determines to use the second unified TCI state, a TCI state in which a plurality of TCI states are associated with a code point in one TCI field may be activated (second embodiment).

[0564] The control unit 210 may also determine whether to use a first unified transmission configuration indication (TCI) state (Rel. 17 unified TCI state) that does not utilize multiple transmission and reception points (TRPs) or a second unified TCI state (Rel. 18 unified TCI state) that utilizes the multiple TRPs. The transmitting and receiving unit 220 may also utilize the first unified TCI state to transmit and receive signals for a single TRP, or utilize the second unified TCI state to transmit and receive signals for multiple TRPs that are configured based on multiple downlink control information (DCIs) (first and second embodiments).

[0565] The control unit 210 may perform the above determination based on at least one of Radio Resource Control (RRC) signaling and Medium Access Control (MAC) control elements (first and second embodiments).

[0566] The size of the DCI for scheduling a specific channel when the first unified TCI state is used and the size of the DCI for scheduling the specific channel when the second unified TCI state is used may be different or common (first and second embodiments).

[0567] The transmitting and receiving unit 220 may receive at least one of a first medium access control (MAC) control element for activating a control resource pool index and a second medium access control (MAC) control element for updating the control resource pool index (third embodiment).

[0568] The transmitting and receiving unit 220 may also receive a medium access control (MAC) control element for activating a unified transmission configuration indication (TCI) state (Rel.18 unified TCI state) using multiple transmission and reception points (TRPs). The control unit 210 may also determine the activation of the unified TCI state based on a specific field included in the MAC CE (Implementation 4).

[0569] The specific field may also be at least one of a field indicating whether the MAC CE includes both the first unified TCI state and the second unified TCI state, a field indicating whether the MAC CE includes the third unified TCI state, and a field indicating whether the MAC CE includes the fourth unified TCI state (the fourth embodiment).

[0570] The MAC CE may include a field indicating the number of unified TCI states corresponding to one TCI code point (fourth embodiment).

[0571] The specific field may be a field for controlling a resource set ID (fourth embodiment).

[0572] (Hardware structure)

[0573] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, by wire, wireless, etc.) and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0574] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method thereof is not particularly limited.

[0575] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 20 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0576] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, and unit can be interchanged. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or may exclude some of the devices.

[0577] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0578] The functions of the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or by controlling at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0579] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, at least a part of the control unit 110 (210), the transmission and reception unit 120 (220), etc. described above may also be implemented by the processor 1001.

[0580] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the other functional blocks can also be implemented in the same way.

[0581] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0582] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disk, a Blu-ray (Blu-ray) (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0583] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) may also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0584] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that performs output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0585] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0586] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0587] (Variation)

[0588] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may be rewritten one another. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the applied standard. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0589] A radio frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a radio frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0590] Here, the parameter set may also be a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of the subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, wireless frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, etc.

[0591] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0592] A time slot may also contain multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of a smaller number of symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0593] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be replaced with each other.

[0594] For example, a subframe may be referred to as a TTI, a plurality of consecutive subframes may be referred to as a TTI, and a time slot or a mini time slot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0595] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0596] TTI can also be a transmission time unit for a data packet (transport block), code block, code word, etc. that has been channel-coded, and can also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (for example, the number of symbols) to which a transport block, code block, code word, etc. is actually mapped can also be shorter than the TTI.

[0597] In addition, when a time slot or a mini time slot is called a TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) may also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling may also be controlled.

[0598] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0599] In addition, a long TTI (eg, normal TTI, subframe, etc.) may be rewritten as a TTI having a time length exceeding 1 ms, and a short TTI (eg, shortened TTI, etc.) may be rewritten as a TTI having a TTI length shorter than that of a long TTI and longer than 1 ms.

[0600] Resource Block (RB) is a resource allocation unit in the time domain and frequency domain, and may also include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0601] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks, respectively.

[0602] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0603] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0604] Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) can also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, common RBs can also be identified by the index of the RB based on the common reference point of the carrier. PRBs can also be defined in a BWP and numbered within the BWP.

[0605] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured in one carrier.

[0606] At least one of the set BWPs may be activated, and the UE may not assume that a specific signal / channel is transmitted or received outside the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be rewritten as "BWP".

[0607] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots per subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0608] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0609] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not limiting in all respects.

[0610] Information, signals, etc. described in the present disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0611] In addition, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0612] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or added. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0613] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0614] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (Layer 1 / Layer 2 (L1 / L2)) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0615] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0616] The determination may be made using a value represented by one bit (0 or 1), a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(eg, comparison with a specific value).

[0617] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software module, application, software application, software package, routine, sub-routine, object, executable files, execution thread, procedure, function, etc.

[0618] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when the software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0619] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0620] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmit power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0621] In the present disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)")", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro cell, and pico cell.

[0622] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that performs communication services within the coverage area.

[0623] In the present disclosure, the base station sending information to the terminal may also be rewritten with the base station instructing the terminal to control / operate based on the information.

[0624] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0625] There are also instances where a mobile station is referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client or some other appropriate terminology.

[0626] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a moving object, a moving object body, etc.

[0627] The mobile body refers to a movable object, and the moving speed is arbitrary, including the case where the mobile body is stopped. The mobile body includes, for example, vehicles, transport vehicles, cars, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, carts, rickshaws, ships (ships and other watercraft), airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, hot air balloons, and objects carried on them, but is not limited to these. In addition, the mobile body can also be a mobile body that drives autonomously based on operating instructions.

[0628] The mobile object may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile object that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0629] Fig.211 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, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed 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.

[0630] The driving unit 41 is composed of at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is composed of at least a steering wheel (also called a handle), and steers 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.

[0631] The electronic control unit 49 is composed of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be referred to as an electronic control unit (ECU).

[0632] As signals from various sensors 50-58, there are the following signals, etc.: a current signal from a current sensor 50 for sensing the current of a motor, a speed signal of the front wheels 46 / rear wheels 47 obtained by a 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 an accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of a brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of a 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.

[0633] The information service unit 59 is composed of various devices for providing (outputting) various information such as driving information, traffic information, entertainment information, etc., such as a navigation system, an audio system, a speaker, a display, a television, and a radio, and one or more ECUs for controlling these devices. The information service unit 59 provides various information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40 using information acquired from an external device via the communication module 60, etc.

[0634] The information service unit 59 may include input devices for accepting input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.), and may also include output devices for implementing output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[0635] The driving assistance system unit 64 is composed of various devices for providing functions for preventing accidents in advance or reducing the driving burden of the driver, such as millimeter wave radar, light detection and ranging (LiDAR), camera, positioning detector (for example, Global Navigation Satellite System (GNSS)), map information (for example, High Definition (HD) map, Autonomous Vehicle (AV) map, etc.), gyroscope system (for example, inertial measurement unit (Inertial Measurement Unit (IMU))), inertial navigation unit (Inertial Navigation System (INS)), etc.), artificial intelligence (Artificial Intelligence (AI)) chip, AI processor, and one or more ECUs for controlling these devices. In addition, the driving assistance system unit 64 sends and receives various information via the communication module 60 to realize the driving assistance function or the automatic driving function.

[0636] The communication module 60 can communicate with the microprocessor 61 and the structural elements of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) between the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the microprocessor 61 and the memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58 provided in the vehicle 40 via the communication port 63.

[0637] The communication module 60 can be controlled by the microprocessor 61 of the electronic control unit 49, and is a communication device that can communicate with an external device. For example, various information is sent and received with the external device via wireless communication. The communication module 60 can be inside or outside the electronic control unit 49. The external device can also be, for example, the above-mentioned base station 10, user terminal 20, etc. In addition, the communication module 60 can also be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (it can also function as at least one of the base station 10 and user terminal 20).

[0638] The communication module 60 may also transmit at least one of the signals from the 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 also be referred to as an input unit that receives input. For example, the PUSCH transmitted by the communication module 60 may also include information based on the above input.

[0639] The communication module 60 receives various information (traffic information, signal information, vehicle information, etc.) transmitted from an external device, and displays it on the information service unit 59 provided in the vehicle. The information service unit 59 may also be referred to as an output unit that outputs information (for example, outputs information to a display, a speaker, etc. based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0640] In addition, the communication module 60 stores various information received from the external device in the memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 can also control the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the various sensors 50-58, etc., which are provided in the vehicle 40.

[0641] In addition, the base station in the present disclosure may also be rewritten as a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be rewritten as terms corresponding to inter-terminal communication (for example, "sidelink"). For example, uplink channels, downlink channels, etc. may also be rewritten as sidelink channels.

[0642] Likewise, the user terminal in the present disclosure may be rewritten as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0643] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node depending on the situation. In a network including one or more network nodes having a base station, various operations performed for communication with a terminal can obviously be performed by the base station, one or more network nodes other than the base station (for example, Mobility Management Entity (MME)), Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0644] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, timings, flow charts, etc. of the various methods / implementations described in this disclosure may be swapped in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0645] The various modes / implementations described in the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems that are extended, modified, generated, or specified based on them. In addition, multiple systems can also be combined (for example, LTE or LTE-A, combination with 5G, etc.) for application.

[0646] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0647] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used or that the first element must take precedence over the second element in some form.

[0648] The term "determining" used in this disclosure may include a variety of operations. For example, "determining" may also refer to situations where judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. are regarded as performing "determining".

[0649] In addition, “judgment (decision)” may also refer to situations where receiving (e.g., receiving information), transmitting (e.g., sending information), input (input), output (output), accessing (e.g., accessing data in a memory), etc. are regarded as making a “judgment (decision)”.

[0650] In addition, "judgment (decision)" can also be regarded as a situation where resolving, selecting, choosing, establishing, comparing, etc. are regarded as "judgment (decision)". That is, "judgment (decision)" can also be regarded as a situation where some operations are regarded as "judgment (decision)".

[0651] In addition, "judge (decide)" can also be rewritten as "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0652] The “maximum transmit power” described in the present disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated maximum transmit power).

[0653] The terms "connected", "coupled", or all their variations used in this disclosure refer to all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be rewritten as "access".

[0654] In the present disclosure, when two elements are connected, it is possible to consider being "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., and as several non-limiting and non-inclusive examples, being "connected" or "combined" to each other using electromagnetic energy with a wavelength in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc.

[0655] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same manner as "different".

[0656] When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms have an inclusive meaning, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not have an exclusive OR meaning.

[0657] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0658] In the present disclosure, "below", "less than", "above", "more", "equal to", etc. may also be rephrased with each other. Furthermore, in the present disclosure, words meaning "good", "bad", "big", "small", "high", "low", "early", "slow", "wide", "narrow", etc. are not limited to the original form, comparative form and superlative form, but may also be rephrased with each other. Furthermore, in the present disclosure, words meaning "good", "bad", "big", "small", "high", "low", "early", "slow", "wide", "narrow", etc. are not limited to the original form, comparative form and superlative form, but may also be rephrased with each other as expressions with "the ith" (i is an arbitrary integer) attached thereto (for example, "the highest" may also be rephrased with "the ith highest").

[0659] In the present disclosure, “of”, “for”, “regarding”, “related to”, “associated with”, etc. may be replaced by each other.

[0660] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: A receiving unit receives a media access control MAC control element for activating a unified transmission setting indication state using multiple transmission and reception points TRP, that is, a unified TCI state; and A control unit determines activation of the unified TCI state based on a specific field included in the MAC CE.

2. The terminal according to claim 1, wherein: The specific field is at least one of a field indicating whether the MAC CE includes both the first unified TCI state and the second unified TCI state, a field indicating whether the MAC CE includes the third unified TCI state, and a field indicating whether the MAC CE includes the fourth unified TCI state.

3. The terminal according to claim 1, wherein: The MAC CE includes a field indicating the number of unified TCI states corresponding to one TCI code point.

4. The terminal according to claim 1, wherein: The specific field is a field for controlling a resource set ID.

5. A wireless communication method, which is a wireless communication method of a terminal, comprising: The step of receiving a media access control MAC control element for activating a unified transmission setting indication state, i.e., a unified TCI state, using multiple transmission and reception points TRP; and The step of determining activation of the unified TCI state based on a specific field included in the MAC CE.

6. A base station, comprising: A sending unit, sending a media access control MAC control element for activating a unified transmission setting indication state using multiple transmission and reception points TRP, that is, a unified TCI state; and The control unit uses a specific field included in the MAC CE to indicate activation of the unified TCI state.

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