Terminal, wireless communication method and base station

Abstract

A terminal according to one embodiment of the present disclosure includes: a receiving unit for receiving a plurality of quasi co-location (QCL) parameters for a control resource set (CORESET); and a control unit for using at least one of the plurality of QCL parameters for at least one QCL assumption of the PDSCH when at least one of the PDSCH and the CORESET satisfies a condition. According to one embodiment of the present disclosure, information related to the QCL can be appropriately determined.

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) is standardized for the purpose of further high-speed data rate, low latency, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) is standardized for the purpose of further increasing the capacity and sophistication of LTE (Release (Rel.) 8, 9)).

[0003] Successor systems of LTE (also known as, for example, 5th generation mobile communication system (5G), 5G+(plus), 6th 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 the transmission and reception processing of 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] However, there are cases where the information on the QCL is not clear. If the information on the QCL is not clear, there is a possibility that the communication quality and throughput may be reduced.

[0010] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately determine information related to QCL.

[0011] Means for solving problems

[0012] A terminal involved in one embodiment of the present disclosure comprises: a receiving unit, which receives multiple quasi-co-location (QCL) parameters for a control resource set (CORESET); and a control unit, which uses at least one of the multiple QCL parameters for at least one QCL assumption of the PDSCH when at least one of the physical downlink shared channel (PDSCH) and the CORESET meets conditions.

[0013] Effects of the Invention

[0014] According to one aspect of the present disclosure, information related to QCL can be appropriately determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A as well as Figure 1B This is a diagram showing an example of a default spatial relationship for PUSCH involved in form 1-1.

[0016] Figure 2 This is a diagram showing an example of a default spatial relationship for PUSCH involved in form 1-2.

[0017] Figure 3A as well as Figure 3B This is a diagram showing an example of a default spatial relationship for PUSCH involved in form 2-1.

[0018] Figure 4 This is a diagram showing an example of a default spatial relationship for PUSCH involved in form 2-2.

[0019] Figure 5A as well as Figure 5BThis is a diagram showing an example of a default spatial relationship for PUCCH involved in form 4-1.

[0020] Figure 6 This is a diagram showing an example of a default spatial relationship for PUCCH involved in format 4-2.

[0021] Fig. 7A as well as Figure 7B This is a diagram showing an example of the default TCI state for PDSCH involved in form 6-1.

[0022] Figure 8 This is a diagram showing an example of the default TCI state for PDSCH involved in form 6-2.

[0023] Fig. 9A as well as Fig. 9B This is a diagram showing an example of a default spatial relationship according to the tenth embodiment.

[0024] Fig.10 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0025] Fig.11 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0026] Fig.12 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0027] Fig.13 This is a diagram showing an example of the hardware configuration of a base station and a user terminal involved in one embodiment. DETAILED DESCRIPTION

[0028] (TCI, spatial relationship, QCL)

[0029] In NR, research is being conducted on 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 coding) in the UE that controls at least one of a signal and a channel (expressed as signal / channel) based on the transmission configuration indication state (Transmission Configuration Indication state (TCI state)).

[0030] The TCI state may also represent the state of a signal / channel applied to a downlink. A state corresponding to the TCI state of a signal / channel applied to an uplink may also be expressed as a spatial relation.

[0031] The TCI state is information related to Quasi-Co-Location (QCL) of signals / channels, and may also be referred to as spatial reception parameters, spatial relationship information, etc. The TCI state may be set for each channel or each signal to the UE.

[0032] QCL is an indicator of the statistical properties of a signal / channel. For example, it may 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 multiple signals / channels (at least one of them is QCL).

[0033] In addition, the spatial reception parameter may also correspond to the UE's reception beam (eg, reception simulation 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 replaced by sQCL (spatial QCL).

[0034] Regarding QCL, multiple types (QCL types) may also be specified. For example, four QCL types AD may be set, in which the same parameters (or parameter sets) may be assumed to be different, and the parameters (also referred to as QCL parameters) may be expressed as follows:

[0035] QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread,

[0036] QCL type B (QCL-B): Doppler shift and Doppler spread,

[0037] QCL Type C (QCL-C): Doppler shift and average delay,

[0038] QCL type D (QCL-D): spatial reception parameters.

[0039] 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 can also be called QCL assumption.

[0040] 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 status or QCL assumption of the signal / channel.

[0041] The TCI state may be, for example, information related to the QCL of the target channel (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.

[0042] The physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI))).

[0043] 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)).

[0044] 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 sounding reference signal (SRS), a tracking CSI-RS (also called Tracking Reference Signal (TRS)), and a QCL detection reference signal (also called QRS).

[0045] The SSB is a signal block including at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)), a secondary synchronization signal (Secondary Synchronization Signal (SSS)), and a broadcast channel (Physical Broadcast Channel (PBCH)). The SSB may also be referred to as an SS / PBCH block.

[0046] The RS of QCL type X in the TCI state may also refer to an RS that has a QCL type X relationship with a certain channel / signal (DMRS), and the RS may also be called a QCL source of QCL type X in the TCI state.

[0047] (Path loss RS)

[0048] Path loss PL in transmission power control of each of PUSCH, PUCCH, and SRS b、f、c (q d ) [dB] Index q of the reference signal (RS, PathlossReferenceRS) for the downlink BWP associated with the activated UL BWP b of carrier f of serving cell c used by the UE d In the present disclosure, the path loss reference RS, pathloss(PL)-RS, index q d , RS used in path loss calculation, RS resources used in path loss calculation can also be replaced with each other. In the present disclosure, calculation, estimation, measurement, and tracking can also be replaced with each other.

[0049] It is being studied whether to change the existing mechanism of higher layer filtered RSRP used for path loss measurement when the path loss RS is updated through MAC CE.

[0050] Alternatively, when the path loss RS is updated through the MAC CE, the L1-RSRP-based path loss measurement is applied. Alternatively, in the available timing after the MAC CE for the update of the path loss RS, the RSRP filtered by the higher layer is used in the path loss measurement, and before the RSRP filtered by the higher layer is applied, the L1-RSRP is used in the path loss measurement. Alternatively, in the available timing after the MAC CE for the update of the path loss RS, the RSRP filtered by the higher layer is used in the path loss measurement, and before this timing, the RSRP filtered by the higher layer of the previous path loss RS is used. It is also possible that the operation is the same as Rel.15, and the RSRP filtered by the higher layer is used in the path loss measurement, and the UE tracks all path loss RS candidates set through RRC. The maximum number of path loss RS that can be set through RRC may also depend on the UE capability. Alternatively, when the maximum number of path loss RSs that can be set through RRC is X, path loss RS candidates less than X are set through RRC, and a path loss RS is selected from the set path loss RS candidates through MAC CE. The maximum number of path loss RSs that can be set through RRC may also be 4, 8, 16, 64, etc.

[0051] In the present disclosure, high-layer filtered RSRP, filtered RSRP, and layer 3 filtered RSRP (layer 3 filtered RSRP) may also be used interchangeably.

[0052] (Default TCI status / Default spatial relationship / Default PL-RS)

[0053] In RRC connection mode, when the TCI information in DCI (high-layer parameter TCI-PresentInDCI) is set to "enabled" or not set, when the time offset between the reception of DL DCI (DCI that schedules PDSCH) and the corresponding PDSCH (PDSCH scheduled by the DCI) is less than the threshold (timeDurationForQCL) (application condition, first condition), if it is not cross-carrier scheduling, the TCI state of PDSCH (default TCI state) may also be the TCI state of the lowest CORESET ID in the latest time slot in the activated DL BWP of the CC (specific UL signal). Otherwise, the TCI state of PDSCH (default TCI state) may also be the TCI state of the lowest TCI state ID of PDSCH in the activated DL BWP of the scheduled CC.

[0054] In Rel. 15, a MAC CE for activation / deactivation of the PUCCH spatial relation and a MAC CE for activation / deactivation of the SRS spatial relation are required. The PUSCH spatial relation follows the SRS spatial relation.

[0055] In Rel. 16, at least one of the MAC CE for activation / deactivation of the PUCCH spatial relationship and the MAC CE for activation / deactivation of the SRS spatial relationship may not be used.

[0056] If both the spatial relationship and PL-RS for PUCCH are not set in FR2 (application condition, second condition), the default assumption of spatial relationship and PL-RS is applied to PUCCH (default spatial relationship and default PL-RS). If both the spatial relationship and PL-RS for SRS (SRS resources for SRS or SRS resources corresponding to SRI in DCI format 0_1 ​​that schedules PUSCH) are not set in FR2 (application condition, second condition), the default assumption of spatial relationship and PL-RS is applied to PUSCH and SRS scheduled by DCI format 0_1 ​​(default spatial relationship and default PL-RS).

[0057] If CORESET is set in the activated DL BWP on the CC (applicable conditions), the default spatial relationship and default PL-RS may also be the TCI state or QCL assumption of the CORESET with the lowest CORESET ID in the activated DL BWP. If CORESET is not set in the activated DL BWP on the CC, the default spatial relationship and default PL-RS may also be the activated TCI state with the lowest ID of the PDSCH in the activated DL BWP.

[0058] In Rel.15, the spatial relationship of the PUSCH scheduled by DCI format 0_0 follows the spatial relationship of the PUCCH resource with the lowest PUCCH resource ID in the activated spatial relationship of the PUCCH on the same CC. Even if no PUCCH is transmitted on the SCell, the network needs to update the PUCCH spatial relationship on all SCells.

[0059] In Rel.16, PUCCH configuration is not required for PUSCH scheduled by DCI format 0_0. For PUSCH scheduled by DCI format 0_0, when there is no activated PUCCH spatial relationship on the activated UL BWP in the CC, or when there are no PUCCH resources (application condition, second condition), the default spatial relationship and default PL-RS are applied to the PUSCH.

[0060] The application conditions of the default spatial relationship / default PL-RS for SRS may also include the case where the default beam path loss activation information element for SRS (higher-layer parameter enableDefaultBeamPlForSRS) is set to valid. The application conditions of the default spatial relationship / default PL-RS for PUCCH may also include the case where the default beam path loss activation information element for PUCCH (higher-layer parameter enableDefaultBeamPlForPUCCH) is set to valid. The application conditions of the default spatial relationship / default PL-RS for PUSCH scheduled through DCI format 0_0 may also include the case where the default beam path loss activation information element for PUSCH scheduled through DCI format 0_0 (higher-layer parameter enableDefaultBeamPlForPUSCH0_0) is set to valid.

[0061] The above-mentioned threshold may also be referred to as time duration for QCL, "timeDurationForQCL", "threshold (Threshold)", "threshold for offset between a DCI indicating a TCIstate and a PDSCH scheduled by the DCI" (Threshold for offset between a DCI indicating a TCIstate and a PDSCH scheduled by the DCI)", "Threshold-Sched-Offset", scheduling offset threshold, scheduling offset threshold, etc.

[0062] (Multiple TRP)

[0063] In NR, one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi TRP (MTRP)) are being studied using one or more planes (multi-panels) to perform DL transmission to the UE. In addition, the UE is studying using one or more panels to perform UL transmission to one or more TRPs.

[0064] In addition, multiple TRPs may correspond to the same cell identifier (cell identifier (ID)) or to different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0065] Multiple TRPs (for example, TRP#1, #2) can also be connected through an ideal / non-ideal backhaul to exchange information, data, etc. Different code words (CW) and different layers can also be sent from each TRP of the multiple TRPs. As a method of sending multiple TRPs, non-coherent joint transmission (NCJT) can also be used.

[0066] In NCJT, for example, TRP#1 performs modulation mapping and layer mapping on a first codeword, and uses a first precoding for a first number of layers (e.g., 2 layers) to send a first PDSCH. In addition, TRP#2 performs modulation mapping and layer mapping on a second codeword, and uses a second precoding for a second number of layers (e.g., 2 layers) to send a second PDSCH.

[0067] In addition, multiple PDSCHs (multi-PDSCHs) that are NCJTed can be defined as partially or completely repeated with respect to at least one of the time domain and the frequency domain. In other words, at least one of the time and frequency resources of the first PDSCH from the first TRP and the second PDSCH from the second TRP can also be repeated.

[0068] It can also be assumed that the first PDSCH and the second PDSCH are not quasi-co-located. The reception of multiple PDSCHs can also be replaced by the simultaneous reception of PDSCHs that are not of a certain QCL type (for example, QCL type D).

[0069] Multiple PDSCHs from multiple TRPs (also referred to as multiple PDSCHs) can also be scheduled using one DCI (single DCI, single PDCCH) (single-primary mode, single-DCI based multi-TRP). Multiple PDSCHs from multiple TRPs can also be scheduled separately using multiple DCIs (multiple DCIs, multiple PDCCHs) (multiple-primary mode, multi-TRPs based on multiple DCIs (multiple-DCI based multi-TRP).

[0070] Based on such a multi-TRP scenario, more flexible transmission control using channels with good quality can be performed.

[0071] In order to support the transmission of multiple TRPs within a cell (intra-cell, with the same cell ID) and between cells (inter-cell, with different cell IDs) based on multiple PDCCHs, in the RRC setting information for linking multiple pairs of PDCCHs and PDSCHs with multiple TRPs, a control resource set (CORESET) in the PDCCH setting information (PDCCH-Config) can also correspond to one TRP.

[0072] (PUSCH issue)

[0073] For channels other than PDSCH (PDCCH, PUSCH, and PUCCH) using multiple TRPs and at least one of multiple panels, functions for improving reliability and robustness are being studied. For example, repetition of PDCCH, PUCCH, and PUSCH using multiple TRPs is being studied.

[0074] For a PUSCH scheduled via DCI format 0_0 on a cell, if the UE is able to apply the spatial relationship corresponding to the dedicated PUCCH resource with the lowest ID within the activated UL BWP of the cell, it sends the PUSCH accordingly.

[0075] In this case, the PUSCH spatial relation follows the spatial relation of the PUCCH resource with the lowest ID.

[0076] For PUSCH scheduled via DCI format 0_0 on a cell, the default beam and PL-RS activation parameters (higher layer parameter enableDefaultBeamPlForPUSCH0_0) for PUSCH scheduled via DCI format 0_0 are set to "valid (enabled)", and the UE is not set to activate PUCCH resources on the UL BWP. When the UE is in RRC connected mode, if the UE can use RS with "QCL type D", it sends PUSCH according to the spatial relationship associated with it. The "QCL type D" corresponds to the QCL assumption of the CORESET with the lowest ID on the activated DL BWP of the cell.

[0077] For the PUSCH scheduled through DCI format 0_0 on a cell, the default beam and PL-RS activation parameters (high-level parameters enableDefaultBeamPlForPUSCH0_0) used for the PUSCH scheduled through DCI format 0_0 are set to "valid (enabled)", and the UE is set to activate the PUCCH resources on the UL BWP. Here, no spatial relationship is set for all PUCCH resources. When the UE is in RRC connected mode, if the UE is set with more than one CORESET on the cell, if the RS with "QCL type D" can be used, the PUSCH is sent according to the spatial relationship associated with it. The above-mentioned "QCL type D" corresponds to the QCL assumption of the CORESET with the lowest ID on the activated DL BWP of the cell.

[0078] In these cases, the PUSCH spatial relationship follows the QCL of the CORESET with the lowest ID.

[0079] When repetition of PDCCH, PUCCH, and PUSCH using multiple TRPs is supported, the following problems 1 and 2 exist.

[0080] [Question 1]

[0081] We are studying the allocation of multiple spatial relationships for one PUCCH resource or multiple PUCCH resources for PUCCH repetition. In the case where the PUCCH spatial relationship is used as the default beam for PUSCH, and its reference PUCCH resource is set / activated / indicated multiple spatial relationships, it is unclear how to define the default beam for PUSCH.

[0082] [Question 2]

[0083] The allocation of multiple TCI states to one CORESET / search space is under study. In the case where the TCI state of a CORESET is used as the default beam for PUSCH, it is unclear how to define the default beam for PUSCH when multiple TCI states are set / activated / indicated by the reference CORESET.

[0084] (PUCCH Issues)

[0085] When all of the following conditions 1 to 4 are satisfied, the spatial configuration for PUCCH transmission from the UE is the same as the spatial configuration for PDCCH reception by the UE within the CORESET with the lowest ID on the activated DL BWP of the PCell.

[0086] [Condition 1]

[0087] The UE is not provided with pathlossReferenceRSs within the PUCCH power control parameter (PUCCH-PowerControl).

[0088] [Condition 2]

[0089] The UE is provided with the default beam for PUCCH and activation parameters for PL-RS (enableDefaultBeamPlForPUCCH).

[0090] [Condition 3]

[0091] The UE is not provided with PUCCH spatial relationship information (PUCCH-SpatialRelationInfo).

[0092] [Condition 4]

[0093] If the UE is not applied a CORESET pool index (CORESETPoolIndex) value even for a CORESET, or is provided a CORESET pool index value for all CORESETs in the CORESET parameters (ControlResourceSet) and there is a TCI field in the DCI format of the search space set, then no code point of the TCI field is mapped to two TCI states.

[0094] In this case, the PUCCH spatial relationship follows the QCL of the CORESET with the lowest ID.

[0095] The following problems exist when PUCCH repetition using multiple TRPs is supported.

[0096] In the case where the TCI state of CORESET is used as the default beam for PUCCH, and its reference CORESET is set / activated / indicates multiple TCI states, it is unclear how the default beam for PUCCH should be defined.

[0097] (PDSCH issue)

[0098] If PDSCH is scheduled using a DCI format that does not have a TCI field, a threshold (timeDurationForQCL) can be applied. When the time offset between the reception of its DL DCI and the corresponding PDSCH is greater than the threshold, the UE assumes that the TCI state or QCL assumption for PDSCH is the same as the TCI state or QCL assumption applied in the CORESET used for PDCCH transmission.

[0099] In this case, the QCL for PDSCH follows the QCL of CORESET for PDCCH.

[0100] In case the (time) offset between the reception of its DL DCI and the corresponding PDSCH is less than the threshold (timeDurationForQCL), the UE assumes that the DM-RS port of the PDSCH of the serving cell is QCL with the RS associated with the QCL parameters used in the PDCCH QCL indication of a specific CORESET. The specific CORESET is the CORESET with the lowest CORESETID (controlResourceSetId) and associated with the monitored search space in the latest time slot monitored by the UE among one or more CORESETs within the activated BWP of the serving cell.

[0101] In this case, the QCL for PDSCH follows the QCL of the CORESET with the lowest ID of the latest slot.

[0102] In addition, the QCL for PDSCH is being studied to follow the QCL of the CORESET with the lowest ID.

[0103] The following problems exist when PDCCH repetition using multiple TRPs is supported.

[0104] In the case where the TCI state of CORESET is used as the default beam for PDSCH, and its reference CORESET is set / activated / indicated multiple TCI states, it is unclear how the default beam for PDSCH should be defined.

[0105] Therefore, the inventors of the present invention conceived a method for determining a default beam.

[0106] In Rel.16, the default spatial relationship for SRS / PUSCH (scheduled by DCI formats 0_0, 0_1, 0_2) and the default PL-RS have the same problem. The following embodiments can be applied when the default spatial relationship / default PL-RS is applied. In the following embodiments, the spatial relationship of the channel / RS for UL is mainly described, but the same rules as in each embodiment can be applied to the default PL-RS.

[0107] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The structures described in each embodiment may be applied individually or in combination.

[0108] In the present disclosure, "A / B", "at least one of A and B" may also be replaced with each other. In the present disclosure, cell, CC, carrier, BWP, DL BWP, UL BWP, activated DL BWP, activated UL BWP, and frequency band may also be replaced with each other. In the present disclosure, index, ID, indicator, and resource ID may also be replaced with each other. In the present disclosure, support, control, controllable, operation, and operation may also be replaced with each other.

[0109] In the present disclosure, configure, activate, update, indicate, enable, and specify may be used interchangeably.

[0110] In the present disclosure, MAC CE and activation / deactivation command may also be replaced with each other.

[0111] In the present disclosure, the high-layer signaling may also be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof. In the present disclosure, RRC parameters, high-layer parameters, RRC information elements (IEs), and RRC messages may also be interchangeable.

[0112] MAC signaling may also use, for example, MAC Control Element (MAC CE), 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 (OSI), etc.

[0113] In the present disclosure, beam, spatial domain filter, spatial setting, TCI state, UL TCI state, unified TCI state, QCL assumption, QCL parameter, spatial domain reception filter, UE spatial domain reception filter, UE reception beam, DL beam, DL reception beam, DL precoding, DL precoder, DL-RS, RS of QCL type D assumed by TCI state / QCL, RS of QCL type A assumed by TCI state / QCL, spatial relationship, spatial domain transmission filter, UE spatial domain transmission filter, UE transmission beam, UL beam, UL transmission beam, UL precoding, UL precoder, PL-RS can also be replaced with each other. In the present disclosure, QCL type X-RS, DL-RS associated with QCL type X, DL-RS with QCL type X, source of DL-RS, SSB, CSI-RS, SRS can also be replaced with each other.

[0114] In the present disclosure, the plane (panel), uplink (Uplink (UL)) transmission entity, TRP, spatial relationship, control resource set (COntrol REsource SET (CORESET)), PDSCH, codeword, base station, antenna port of a certain signal (for example, demodulation reference signal (DeModulation Reference Signal (DMRS)) port), antenna port group of a certain signal (for example, DMRS port group), group for multiplexing (for example, code division multiplexing (Code Division Multiplexing (CDM)) group, reference signal group, CORESET group), CORESET pool, CW, redundancy version (redundancy version (RV)), layer (MIMO layer, transmission layer, spatial layer) can also be replaced with each other. In addition, the plane identifier (Identifier (ID)) and the plane can also be replaced with each other. In the present disclosure, TRP ID and TRP can also be replaced with each other.

[0115] In the present disclosure, a UE with multiple TRPs set can also determine at least one of the TRP corresponding to the DCI, the PDSCH scheduled by the DCI, or the TRP corresponding to the UL transmission (PUCCH, PUSCH, SRS, etc.) based on at least one of the following.

[0116] ·The value of a specific field included in the DCI (e.g., a field specifying the TRP, an antenna port field, a PRI).

[0117] DMRS corresponding to the scheduled PDSCH / PUSCH (for example, the DMRS sequence, resources, CDM group, DMRS port, DMRS port group, antenna port group, etc.).

[0118] · The DMRS corresponding to the PDCCH on which the DCI is transmitted (for example, the sequence, resources, CDM group, DMRS port, DMRS port group, etc. of the DMRS).

[0119] The CORESET that received the DCI (e.g., the CORESET pool ID of the CORESET, the ID of the CORESET, the scrambling ID (which may also be replaced by a sequence ID), resources, etc.).

[0120] RS (RS related group, etc.) used in TCI status, QCL assumption, spatial relationship information, etc.

[0121] In the present disclosure, a single PDCCH (DCI) may also be referred to as a PDCCH (DCI) of a first scheduling type (e.g., scheduling type A (or type 1)). In addition, a multiple PDCCH (DCI) may also be referred to as a PDCCH (DCI) of a second scheduling type (e.g., scheduling type B (or type 2)).

[0122] In the present disclosure, a single PDCCH may also be conceived to be supported when multiple TRPs utilize an ideal backhaul. Multiple PDCCHs may also be conceived to be supported when multiple TRPs utilize a non-ideal backhaul.

[0123] In addition, the ideal backhaul may also be referred to as DMRS port group type 1, reference signal association group type 1, antenna port group type 1, CORESET pool type 1, etc. The non-ideal backhaul may also be referred to as DMRS port group type 2, reference signal association group type 2, antenna port group type 2, CORESET pool type 2, etc. The names are not limited to these.

[0124] In the present disclosure, single TRP, single TRP system, single TRP transmission, and single PDSCH may also be replaced with each other. In the present disclosure, multiple TRPs, multiple TRP systems, multiple TRP transmissions, and multiple PDSCH may also be replaced with each other. In the present disclosure, single DCI, single PDCCH, multiple TRPs based on single DCI, and two TCI states activated on at least one TCI code point may also be replaced with each other.

[0125] In the present disclosure, a single TRP, a channel 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 is not set for any CORESET, and no code point of the TCI field is mapped to two TCI states can also be replaced with each other.

[0126] In the present disclosure, multiple TRPs, channels 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 DCI may also be replaced with each other. In the present disclosure, multiple TRPs based on multiple DCIs, and a CORESET pool index (CORESETPoolIndex) value set for CORESET may also be replaced with each other. In the present disclosure, multiple TRPs based on a single DCI, and at least one code point of a TCI field mapped to two TCI states may also be replaced with each other.

[0127] (Wireless Communication Method)

[0128] In the present disclosure, reference PUCCH resources, specific PUCCH resources, and dedicated PUCCH resources with the lowest ID within the activated UL BWP of its cell may also be replaced with each other.

[0129] In the present disclosure, the reference CORESET, the specific CORESET, the CORESET with the lowest ID on the activated DL BWP of its cell, the CORESET used in PDCCH transmission, the CORESET with the lowest ID in the latest time slot, and the CORESET with the lowest ID in the latest time slot where more than one CORESET is monitored by the UE can also be replaced with each other.

[0130] In the present disclosure, conditions, application conditions, and at least one application condition in the first to tenth embodiments may also be replaced with each other.

[0131] In the present disclosure, repetition may also be applied to Ultra-Reliable and Low Latency Communications (URLLC). URLLC may also be a channel (PUSCH / PUCCH / PDSCH) scheduled by a DCI including a priority indicator field indicating a priority index of 0 or 1.

[0132] <First embodiment>

[0133] When PUCCH spatial relationship information is used as the default spatial relationship for PUSCH, a reference PUCCH resource (PUCCH resource having the PUCCH spatial relationship information) may also be configured / activated / indicated multiple spatial relationships. The PUSCH to which the default spatial relationship is applied may also follow at least one of the following forms 1-1 and 1-2.

[0134] 《Form 1-1》

[0135] PUSCH can also be single TRP PUSCH.

[0136] For single TRP PUSCH, when the UE is able to apply at least one of the following spatial relationships 1 and 2, the UE may also send PUSCH according to the spatial relationship.

[0137] [Spatial Relationship 1]

[0138] The first spatial relation that is configured / activated / indicated for the dedicated PUCCH resource with the lowest ID (reference PUCCH resource) within the activated UL BWP of its cell. Figure 1A In the example, the UE uses the first spatial relationship among multiple spatial relationships of reference PUCCH resources for the default spatial relationship / default PL-RS of the single TRP PUSCH.

[0139] [Spatial Relationship 2]

[0140] The spatial relation with the lowest spatial relation ID for which the dedicated PUCCH resource with the lowest ID within the activated UL BWP of its cell (reference PUCCH resource) is set / activated / indicated. Figure 1B In the example, the UE uses the spatial relationship with the lowest spatial relationship information ID among multiple spatial relationships of the reference PUCCH resources for the default spatial relationship / default PL-RS of the single TRP PUSCH.

[0141] Mode 1-1 may also be applied when at least one of the following application conditions 1 to 3 is met.

[0142] [Application Condition 1]

[0143] The spatial relationship of PUCCH resources is applied as the default spatial relationship of PUSCH. For example, PUSCH is scheduled by DCI format 0_0.

[0144] [Application Condition 2]

[0145] A plurality of spatial relationships are set / activated / indicated for reference PUCCH resources.

[0146] [Application Condition 3]

[0147] PUSCH is a single TRP PUSCH transmission.

[0148] 《Form 1-2》

[0149] PUSCH can also be multi-TRP PUSCH repetition.

[0150] For multi-TRP PUSCH repetition, the UE may also follow at least one of the following processes 1 and 2.

[0151] [Process 1]

[0152] In the case where multiple spatial relationships in which the dedicated PUCCH resource with the lowest ID within the activated UL BWP for its cell is configured / activated / indicated can be applied, the UE transmits PUSCH according to multiple spatial relationships corresponding to the multiple spatial relationships. The mapping order between multiple default spatial relationships and multiple PUSCH repetitions may also be the same as the mapping order between multiple spatial relationships and multiple PUSCH repetitions in the case where multiple spatial relationships are configured / activated / indicated for PUSCH transmission. The UE may also use multiple default spatial relationships in multiple repetitions.

[0153] Figure 2 In the example, the UE uses two spatial relationships of reference PUCCH resources for two default spatial relationships / default PL-RS for multi-TRP PUSCH repetitions.

[0154] [Process 2]

[0155] The UE follows form 1-1. The UE may also fall back to PUSCH transmission with a single spatial relationship. The UE may also use a default spatial relationship in multiple iterations.

[0156] Mode 1-2 can also be applied when at least one of the following application conditions 1 to 3 is met.

[0157] [Application Condition 1]

[0158] The spatial relationship of PUCCH resources is applied as the default spatial relationship of PUSCH. For example, PUSCH is scheduled by DCI format 0_0.

[0159] [Application Condition 2]

[0160] A plurality of spatial relationships are set / activated / indicated for reference PUCCH resources.

[0161] [Application Condition 3]

[0162] PUSCH is sent as multiple TRP PUSCH.

[0163] Method 1-2 may also be applied to at least one of multi-TRP PUSCH repetition based on a single DCI and multi-TRPP USCH repetition based on multiple DCIs.

[0164] According to the above-described first embodiment, the PUCCH spatial relationship information can be appropriately used as the default spatial relationship for PUSCH.

[0165] <Second embodiment>

[0166] In the case of a QCL assumption using a CORESET as the default spatial relationship for PUSCH, a reference CORESET (CORESET with the QCL assumption) may also be set / activated / indicated multiple TCI states. The PUSCH to which the default spatial relationship is applied may also follow at least one of the following forms 2-1 and 2-2.

[0167] 《Form 2-1》

[0168] PUSCH can also be single TRP PUSCH.

[0169] For single TRP PUSCH, when the UE is able to apply the spatial relationship associated with the RS of "QCL type D" corresponding to at least one of the following QCL assumptions 1 and 2, the UE may also send PUSCH according to the spatial relationship.

[0170] [QCL scenario 1]

[0171] The first TCI state is set / activated / indicated by the CORESET with the lowest ID (reference CORESET) on the activated DL BWP for its cell. Figure 3A In the example, the UE uses the first TCI state among the multiple TCI states of the reference CORESET for the default spatial relationship / default PL-RS of the single TRP PUSCH.

[0172] [QCL scenario 2]

[0173] The TCI state with the lowest TCI state ID is set / activated / indicated by the CORESET with the lowest ID (reference CORESET) on the activated DL BWP for its cell. Figure 3B In the example, the UE uses the TCI state with the lowest TCI state ID among the multiple TCI states of the reference CORESET for the default spatial relationship / default PL-RS of the single TRP PUSCH.

[0174] Mode 2-1 can also be applied when at least one of the following application conditions 1 to 3 is met.

[0175] [Application Condition 1]

[0176] QCL assumption using CORESET as the default spatial relationship of PUSCH. For example, PUSCH is scheduled by DCI format 0_0, and no PUCCH resources are configured. For example, PUSCH is scheduled by DCI format 0_0, and no spatial relationship is configured for PUCCH resources.

[0177] [Application Condition 2]

[0178] Reference CORESET is set / activated / indicates multiple TCI states.

[0179] [Application Condition 3]

[0180] PUSCH is a single TRP PUSCH transmission.

[0181] 《Form 2-2》

[0182] PUSCH can also be multi-TRP PUSCH repetition.

[0183] For multi-TRP PUSCH repetition, the UE may also follow at least one of the following processes 1 and 2.

[0184] [Process 1]

[0185] The UE transmits PUSCH according to multiple spatial relationships in the case where multiple spatial relationships associated with RS with "QCL Type D" can be applied, where "QCL Type D" corresponds to the QCL assumption of multiple TCI states for which the CORESET with the lowest ID on the activated DL BWP of its cell is set / activated / indicated. The mapping order between multiple default spatial relationships and multiple PUSCH repetitions can also be the same as the mapping order between multiple spatial relationships and multiple PUSCH repetitions when multiple spatial relationships are set / activated / indicated for PUSCH transmission. The UE can also use multiple default spatial relationships in multiple repetitions.

[0186] Figure 4 In the example, the UE shall use the two TCI states of the reference CORESET for the two default spatial relationships / default PL-RS for multi-TRP PUSCH repetitions.

[0187] [Process 2]

[0188] The UE follows form 2-1. The UE may also fall back to PUSCH transmission with a single spatial relationship. The UE may also use a default spatial relationship in multiple iterations.

[0189] Mode 2-2 can also be applied when at least one of the following application conditions 1 to 3 is met.

[0190] [Application Condition 1]

[0191] QCL assumption using CORESET as the default spatial relationship of PUSCH. For example, PUSCH is scheduled by DCI format 0_0, and no PUCCH resources are configured. For example, PUSCH is scheduled by DCI format 0_0, and no spatial relationship is configured for PUCCH resources.

[0192] [Application Condition 2]

[0193] Reference CORESET is set / activated / indicates multiple TCI states.

[0194] [Application Condition 3]

[0195] PUSCH is sent as multiple TRP PUSCH.

[0196] Method 2-2 can also be applied to at least one of multi-TRP PUSCH repetition based on a single DCI and multi-TRPP USCH repetition based on multiple DCIs.

[0197] According to the above second embodiment, the QCL assumption of CORESET can be appropriately used as the default spatial relationship for PUSCH.

[0198] <Third embodiment>

[0199] A UE capability (capability) indicating at least one of the following capabilities 1 to 4 related to at least one of the first and second embodiments may be specified.

[0200] [Ability 1]

[0201] Whether the UE supports one of a plurality of spatial relationships of PUCCH resources used as the default spatial relationship for PUSCH (method 1-1).

[0202] [Ability 2]

[0203] Whether the UE supports multiple spatial relationships of PUCCH resources used as multiple default spatial relationships for PUSCH (method 1-2).

[0204] [Ability 3]

[0205] Whether the UE supports one of the multiple TCI states of CORESET used as the default spatial relationship for PUSCH (method 2-1).

[0206] [Ability 4]

[0207] Whether the UE supports multiple TCI states of CORESET used as multiple default spatial relationships for PUSCH (method 2-2).

[0208] For at least one function of the first and second embodiments, the UE may also apply the function in at least one case where the UE reports the corresponding UE capability and the UE is set / activated / indicated the corresponding high-layer parameters. In this case, the UE may not apply the function.

[0209] According to the third embodiment described above, the UE can appropriately use the default spatial relationship for PUSCH while maintaining compatibility with the existing specifications.

[0210] <Fourth embodiment>

[0211] In the case of a QCL assumption using CORESET as the default spatial relationship for PUCCH, a reference CORESET (CORESET with the QCL assumption) may also be configured / activated / indicated multiple TCI states. The PUCCH to which the default spatial relationship is applied may also follow at least one of the following forms 4-1 and 4-2.

[0212] 《Method 4-1》

[0213] PUCCH can also be a single TRP PUCCH.

[0214] For single TRP PUCCH, the UE may send PUCCH using the same spatial relationship as the TCI state for PDCCH reception following at least one of the following TCI states 1 and 2.

[0215] [TCI Status 1]

[0216] The first TCI state for which the CORESET with the lowest ID (reference CORESET) on the activated DL BWP of its cell is set / activated / indicated. Figure 5A In the example, the UE uses the first TCI state among the multiple TCI states of the reference CORESET for the default spatial relationship / default PL-RS of the single TRP PUCCH.

[0217] [TCI Status 2]

[0218] The TCI state with the lowest TCI state ID is set / activated / indicated by the CORESET with the lowest ID (reference CORESET) on the activated DL BWP for its cell. Figure 5B In the example, the UE uses the TCI state with the lowest TCI state ID among the multiple TCI states of the reference CORESET for the default spatial relationship / default PL-RS of the single TRP PUCCH.

[0219] Mode 4-1 can also be applied when at least one of the following application conditions 1 to 3 is met.

[0220] [Application Condition 1]

[0221] The QCL assumption of using CORESET as the default spatial relationship of PUCCH is, for example, a case where PUCCH spatial relationship information (PUCCH-SpatialRelationInfo) is not configured for PUCCH resources. For example, PL-RS is not configured.

[0222] [Application Condition 2]

[0223] Reference CORESET is set / activated / indicates multiple TCI states.

[0224] [Application Condition 3]

[0225] PUCCH is a single TRP PUCCH transmission.

[0226] 《Form 4-2》

[0227] PUCCH can also be multi-TRP PUCCH repetition.

[0228] For multiple TRP PUCCH repetitions, the UE may also follow at least one of the following processes 1 and 2.

[0229] [Process 1]

[0230] The PUCCH is transmitted using the same multiple spatial relationships as the multiple TCI states for PDCCH reception for the multiple TCI states set / activated / indicated following the CORESET with the lowest ID on the activated DL BWP for its cell. The mapping order between the multiple default spatial relationships and the multiple PUCCH repetitions may also be the same as the mapping order between the multiple spatial relationships and the multiple PUCCH repetitions when the multiple spatial relationships are set / activated / indicated for PUCCH transmission. The UE may also use multiple default spatial relationships in multiple repetitions.

[0231] exist Figure 6In the example, the UE will use the two TCI states of the reference CORESET for the two default spatial relations / default PL-RS for multi-TRP PUCCH repetitions.

[0232] [Process 2]

[0233] The UE follows form 4-1. The UE may also fall back to PUCCH transmission with a single spatial relationship. The UE may also use a default spatial relationship in multiple iterations.

[0234] Mode 4-2 can also be applied when at least one of the following application conditions 1 to 3 is met.

[0235] [Application Condition 1]

[0236] The QCL assumption of CORESET is used as the default spatial relationship of PUCCH. For example, PUCCH spatial relationship information (PUCCH-SpatialRelationInfo) is not configured for PUCCH resources. For example, PL-RS is not configured.

[0237] [Application Condition 2]

[0238] Reference CORESET is set / activated / indicates multiple TCI states.

[0239] [Application Condition 3]

[0240] PUCCH is sent as multiple TRP PUCCH.

[0241] According to the fourth embodiment described above, the QCL assumption of CORESET can be appropriately used as the default spatial relationship for PUCCH.

[0242] <Fifth embodiment>

[0243] A UE capability (capability) indicating at least one of the following capabilities 1 and 2 related to at least one of the third embodiments may be specified.

[0244] [Ability 1]

[0245] Whether the UE supports one of the multiple TCI states of CORESET used as the default spatial relationship for PUCCH (method 4-1).

[0246] [Ability 2]

[0247] Whether the UE supports multiple TCI states of CORESET used as multiple default spatial relationships for PUCCH (method 4-2).

[0248] For at least one function in the fourth embodiment, the UE may also apply the function in at least one case where the UE reports the corresponding UE capability and the UE is set / activated / indicated the corresponding high-layer parameters. In this case, the UE may not apply the function.

[0249] According to the fifth embodiment described above, the UE can maintain compatibility with the existing specifications and appropriately use the default spatial relationship for PUCCH.

[0250] <Sixth embodiment>

[0251] When the QCL assumption of CORESET is used as the default QCL for PDSCH, the reference CORESET (CORESET with this QCL assumption) may also be set / activated / indicated multiple TCI states. The PDSCH to which the default QCL is applied may also follow at least one of the following forms 6-1 and 6-2.

[0252] 《Method 6-1》

[0253] PDSCH can also be a single TRP PDSCH.

[0254] For a single TRP PDSCH, if its PDSCH is scheduled using a DCI format that does not have a TCI field, and the time offset between the reception of its DL DCI and the corresponding PDSCH is greater than a threshold (timeDurationForQCL), the UE may also assume that the TCI state or QCL for PDSCH is the same as at least one of the following QCL parameters 1 and 2.

[0255] [QCL parameter 1]

[0256] The first TCI state / QCL assumption set / activated / indicated for the CORESET (reference CORESET) used for PDCCH transmission. Fig. 7A In the example, the UE uses the first TCI state among the multiple TCI states of the reference CORESET as the default TCI state for the single TRP PDSCH.

[0257] [QCL parameter 2]

[0258] The TCI state / QCL assumption with the lowest TCI state ID that is set / activated / indicated for the CORESET (reference CORESET) used for PDCCH transmission. Figure 7BIn the example of , the UE uses the TCI state with the lowest TCI state ID among the multiple TCI states of the reference CORESET for the default TCI state of the single TRP PDSCH.

[0259] For a single TRP PDSCH, when the time offset between the reception of its DL DCI and the corresponding PDSCH is less than the threshold (timeDurationForQCL), the UE may also assume that the TCI state or QCL state used for PDSCH may be the same as at least one of the following QCL parameters 1 and 2 (it may also be assumed that the DM-RS port of the PDSCH of the serving cell and the RS related to at least one of the following QCL parameters 1 and 2 become QCL).

[0260] [QCL parameter 1]

[0261] The first TCI state / QCL assumption set / activated / indicated for the CORESET with the lowest ID (reference CORESET) on the activated DL BWP of its cell ( Fig. 7A ).

[0262] [QCL parameter 2]

[0263] The TCI state / QCL assumption with the lowest TCI state ID set / activated / indicated for the CORESET with the lowest ID on the activated DL BWP of its cell (reference CORESET) Figure 7B ).

[0264] Method 6-1 can also be applied when at least one of the following application conditions 1 and 2 is met.

[0265] [Application Condition 1]

[0266] Reference CORESET is set / activated / indicates multiple TCI states.

[0267] [Application Condition 2]

[0268] PDSCH is a single TRP PDSCH transmission.

[0269] Method 6-2

[0270] PDSCH can also be multi-TRP PDSCH repetition.

[0271] For multi-TRP PUDSH repetition, if its PDSCH is scheduled through a DCI format without a TCI field, and the time offset between the reception of its DL DCI and the corresponding PDSCH is greater than a threshold (timeDurationForQCL), the UE may also follow at least one of the following processes 1 and 2.

[0272] [Process 1]

[0273] The multiple TCI states / QCLs assumed by the UE for PDSCH are assumed to be the same as the multiple TCI states / QCLs assumed to be set / activated / indicated for the CORESET used for PDCCH reception. The mapping order between the multiple default TCI states and the multiple PDSCH repetitions may also be the same as the mapping order between the multiple TCI states and the multiple PDSCH repetitions in the case of the multiple TCI states set / activated / indicated for PDSCH transmission. The UE may also use multiple default TCI states in multiple repetitions.

[0274] exist Figure 8 In the example, the UE uses the two TCI states of the reference CORESET for the two default TCI states of multi-TRP PDSCH repetitions.

[0275] [Process 2]

[0276] The UE follows method 6-1. The UE may also fall back to PDSCH transmission with a single TCI state. The UE may also use a default TCI state in multiple iterations.

[0277] For a single TRP PDSCH, when the time offset between the reception of the DL DCI and the corresponding PDSCH is less than a threshold (timeDurationForQCL), the UE may also follow at least one of the following processes 1 and 2.

[0278] [Process 1]

[0279] The multiple TCI states / QCLs assumed by the UE for PDSCH are the same as the multiple TCI states / QCLs assumed to be set / activated / indicated for the CORESET with the lowest ID on the activated DL BWP of its cell. The mapping order between multiple default TCI states and multiple PDSCH repetitions may also be the same as the mapping order between multiple TCI states and multiple PDSCH repetitions when multiple TCI states are set / activated / indicated for PDSCH transmission. The UE may also use multiple default TCI states in multiple repetitions.

[0280] [Process 2]

[0281] The UE follows method 6-1. The UE may also fall back to PDSCH transmission with a single TCI state. The UE may also use a default TCI state in multiple iterations.

[0282] Method 6-2 can also be applied when at least one of the following application conditions 1 and 2 is met.

[0283] [Application Condition 1]

[0284] Reference CORESET is set / activated / indicates multiple TCI states.

[0285] [Application Condition 2]

[0286] PDSCH is multi-TRP PDSCH transmission.

[0287] According to the sixth embodiment described above, the QCL assumption of CORESET can be appropriately used as the default spatial relationship for PDSCH.

[0288] <Seventh embodiment>

[0289] A UE capability (capability) indicating at least one of the following capabilities 1 and 2 related to at least one of the sixth embodiments may be specified.

[0290] [Ability 1]

[0291] Whether the UE supports one of the multiple TCI states of the CORESET used as the default TCI state for PDSCH (method 6-1).

[0292] [Ability 2]

[0293] Whether the UE supports multiple TCI states of the CORESET used as multiple default TCI states for PDSCH (method 6-2).

[0294] For at least one function in the sixth embodiment, the UE may also apply the function in at least one case where the UE reports the corresponding UE capability and the UE is set / activated / indicated the corresponding high-layer parameters. In this case, the UE may not apply the function.

[0295] According to the seventh embodiment described above, the UE can appropriately use the default spatial relationship for PDSCH while maintaining compatibility with the existing specifications.

[0296] <Eighth Embodiment>

[0297] In at least one of the first to seventh embodiments, the UE may also comply with at least one of the following forms 8-1 and 8-2.

[0298] 《Form 8-1》

[0299] In at least one of the first to seventh embodiments, when the TCI state / QCL assumption of CORESET is used as the default spatial relationship / TCI state / QCL assumption of PUSCH / PUCCH / PDSCH, the reference CORESET may also be a specific CORESET. The specific CORESET may not be the CORESET with the lowest ID. The specific CORESET may also be the CORESET with the lowest ID in the latest time slot, or may be the CORESET with the lowest ID in the latest time slot where one or more CORESETs are monitored by the UE.

[0300] 《Form 8-2》

[0301] In the first embodiment, when the spatial relationship of PUCCH resources is used as the default spatial relationship for PUSCH, the reference PUCCH resource may be a specific PUCCH resource. The specific PUCCH resource may not be the dedicated PUCCH resource with the lowest ID in the activated UL BWP of the cell.

[0302] According to the eighth embodiment described above, the reference CORESET or the reference PUCCH resource can be appropriately determined.

[0303] <Ninth embodiment>

[0304] In at least one of the first to seventh embodiments, the UE may also follow at least one of the following methods 9-1 and 9-2.

[0305] Method 9-1

[0306] A default TCI state / spatial relationship may also be explicitly set / activated / indicated. The UE may also apply the set / activated / indicated default TCI state / spatial relationship in at least one of the first to seventh embodiments.

[0307] Method 9-2

[0308] Multiple default TCI states / spatial relationships may also be explicitly set / activated / indicated. The UE may also apply multiple default TCI states / spatial relationships that are set / activated / indicated in at least one of the first to seventh embodiments.

[0309] For a single TRP, the UE may also apply at least one of the following parameters 1 and 2.

[0310] [Parameter 1]

[0311] The first default TCI state / spatial relationship to be set / activated / indicated.

[0312] [Parameter 2]

[0313] The default TCI state / spatial relationship with the lowest ID is set / activated / indicated.

[0314] For multiple TRPs, the UE may also apply multiple set / activated / indicated TCI states / spatial relationships. The mapping order between multiple default TCI states / spatial relationships and multiple PDSCH / PUSCH / PUCCH repetitions may also be the same as the mapping order between multiple TCI states / spatial relationships and multiple PDSCH repetitions when multiple TCI states / spatial relationships are set / activated / indicated for PDSCH / PUSCH / PUCCH. The UE may also use multiple default TCI states / default spatial relationships in multiple repetitions.

[0315] In order to distinguish the operation of the ninth embodiment from at least one operation of the first to seventh embodiments, an RRC parameter may also be set.

[0316] If the default TCI state / spatial relationship is not explicitly set / activated / indicated, the UE may also apply at least one of the first to seventh implementation modes.

[0317] According to the above ninth embodiment, multiple default TCI states / spatial relationships can be appropriately determined.

[0318] <Tenth embodiment>

[0319] Regardless of the number of TCI states / QCL assumptions / spatial relationships of the source RS of the default spatial relationship, the number of TCI states / QCL assumptions / spatial relationships of the target RS may also always be one.

[0320] If there are multiple TCI states / QCL assumptions that are assumed to be the source of the default spatial relationship, the default spatial relationship / default PL-RS may also be one. For example, the UE may also select the lowest TCI state ID. For example, in the case where there are a first TCI state and a second TCI state that are set / indicated, the UE may also select the first TCI state.

[0321] Fig. 9A In the example of , when a CORESET is configured in a CC, the default spatial relationship and the default PL-RS are the TCI states of the CORESET with the lowest CORESET ID among multiple activated TCI states of the PDCCH. Fig. 9BIn the example, when CORESET is not set within the CC, the default spatial relationship and the default PL-RS are the TCI state with the lowest TCI state ID among multiple activated TCI states of PDSCH.

[0322] When the spatial relationship of PUCCH / SRS / PUSCH and PL-RS are not set in FR2, the default spatial relationship of PUCCH / SRS / PUSCH and the default PL-RS may follow one TCI state / QCL assumption even when there are multiple TCI states / QCL assumptions.

[0323] According to the above tenth embodiment, the default spatial relationship / default PL-RS can be appropriately determined.

[0324] (Wireless Communication System)

[0325] 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.

[0326] Fig.10 1 is a diagram showing an example of a schematic structure of a wireless communication system involved in one embodiment. The wireless communication 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 (5G NR), and the like.

[0327] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can 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.

[0328] 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.

[0329] The wireless communication system 1 can 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)).

[0330] 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 the 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 the base station 10.

[0331] 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).

[0332] 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 (lower than 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (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.

[0333] Furthermore, the user terminal 20 may perform communication in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0334] 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 wirelessly (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 may also be referred to as an IAB node.

[0335] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0336] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0337] 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.

[0338] 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 applied to the UL and DL radio access schemes.

[0339] 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)) and the like may be used.

[0340] In addition, in the wireless communication system 1, as uplink channels, 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)) and the like may be used.

[0341] The PDSCH is used to transmit user data, high-layer control information, system information block (SIB), etc. The PUSCH is also used to transmit user data, high-layer control information, etc. In addition, the PBCH is also used to transmit the master information block (MIB).

[0342] The lower layer control information may also be transmitted via the PDCCH. 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.

[0343] In addition, the DCI that schedules the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be replaced by DL data, and the PUSCH may also be replaced by UL data.

[0344] 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.

[0345] 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 interchangeable.

[0346] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., may also be called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (Scheduling Request (SR)) may also be transmitted through PUCCH. Random access preamble code for establishing connection with a cell may also be transmitted through PRACH.

[0347] In the present disclosure, downlink, uplink, etc. may be expressed without "link". In addition, various channels may be expressed without "Physical" at the beginning.

[0348] 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, as DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (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.

[0349] 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 (SSB), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0350] 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. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0351] (Base Station)

[0352] Fig.11 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.

[0353] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed 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.

[0354] 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 the common knowledge in the technical field to which the present disclosure relates.

[0355] 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.

[0356] 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 described based on the public knowledge in the technical field involved in the present disclosure.

[0357] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured by a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0358] The transmitting / receiving antenna 130 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0359] 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.

[0360] 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.

[0361] 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 (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 110, to generate a bit string to be sent.

[0362] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter 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 sent, and output a baseband signal.

[0363] The transmitting and receiving unit 120 (RF unit 122 ) may 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 .

[0364] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0365] The sending and receiving unit 120 (receiving processing unit 1212) can also apply 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.

[0366] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (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 (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (ReceivedSignal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0367] The transmission path interface 140 can also send and receive signals (return signaling) between the devices included in the core network 30, 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.

[0368] 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 .

[0369] The transmitting and receiving unit 120 may also transmit a plurality of spatial settings for uplink or downlink resources. When a physical uplink shared channel (PUSCH) and at least one of the above resources meet the conditions, the control unit 110 may also control the reception of the above PUSCH transmitted using at least one of the above multiple spatial settings.

[0370] The transmitting and receiving unit 120 may also transmit a plurality of quasi co-location (QCL) parameters for a control resource set (CORESET). When at least one of a physical uplink control channel (PUCCH) and the CORESET satisfies a condition, the control unit 110 may also control the reception of the PUCCH transmitted using at least one of the plurality of QCL parameters.

[0371] The transmitting and receiving unit 120 may also transmit a plurality of quasi co-location (QCL) parameters for a control resource set (CORESET). When at least one of a physical downlink shared channel (PDSCH) and the CORESET satisfies a condition, the control unit 110 may also control the reception of the PDSCH transmitted using at least one of the plurality of QCL parameters.

[0372] (User Terminal)

[0373] Fig.12 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 transmission / reception unit 220, and a transmission / reception antenna 230. In addition, the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided in one or more pieces.

[0374] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also assumed 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.

[0375] 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 the common knowledge in the technical field to which the present disclosure relates.

[0376] 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.

[0377] 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, a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0378] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured by a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0379] The transmitting / receiving antenna 230 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0380] 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.

[0381] 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.

[0382] The sending and receiving unit 220 (sending processing unit 2211), for example, can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0383] The transmitting and receiving unit 220 (transmitting processing unit 2211) can 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 sent, and output a baseband signal.

[0384] 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 activated (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.

[0385] 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 .

[0386] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230 .

[0387] The sending and receiving unit 220 (receiving processing unit 2212) can also apply 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 acquired baseband signal to obtain user data, etc.

[0388] 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 measurements, CSI measurements, etc. based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0389] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be constituted by at least one of the transmitting and receiving unit 220 , the transmitting and receiving antenna 230 , and the transmission path interface 240 .

[0390] The transmitting and receiving unit 220 may also receive multiple spatial settings for uplink or downlink resources. When a physical uplink shared channel (PUSCH) and at least one of the above resources meet the conditions, the control unit 210 may also use at least one of the above multiple spatial settings for at least one spatial relationship of the above PUSCH.

[0391] The above-mentioned resource may be any one of a physical uplink control channel (PUCCH) resource and a control resource set (CORESET).

[0392] For any CORESET whose pool index value is not set to "1" and no code point of the sending setting indication (TCI) field is mapped to two TCI states, if the above-mentioned PUSCH meets the above-mentioned conditions, the above-mentioned control unit 210 may also use one of the above-mentioned multiple spatial settings for a spatial relationship of the above-mentioned PUSCH.

[0393] For at least one CORESET whose pool index value is set to "1", or at least one code point of the transmission setting indication (TCI) field is mapped to two TCI states, when the above-mentioned PUSCH satisfies the above-mentioned conditions and the above-mentioned PUSCH is repeatedly transmitted, the above-mentioned control unit 210 may also use the above-mentioned multiple spatial settings for multiple spatial relationships of the above-mentioned PUSCH respectively.

[0394] The transmitting and receiving unit 220 may also receive a plurality of quasi co-location (QCL) parameters for a control resource set (CORESET). When at least one of a physical uplink control channel (PUCCH) and the CORESET meets the conditions, the control unit 210 may also use at least one of the plurality of QCL parameters for at least one spatial relationship of the PUCCH.

[0395] The above CORESET can also have a minimum ID.

[0396] For any CORESET whose pool index value is not set to "1" and no code point of the sending setting indication (TCI) field is mapped to two TCI states, if the PUCCH meets the above conditions, the control unit 210 may also use one of the above multiple QCL parameters for a spatial relationship of the above PUCCH.

[0397] For at least one CORESET whose pool index value is set to "1", or at least one code point of the transmission setting indication (TCI) field is mapped to two TCI states, when the PUCCH satisfies the above conditions and the above PUCCH is repeatedly sent, the control unit 210 may also use the multiple QCL parameters for multiple spatial relationships of the PUCCH respectively.

[0398] The transmitting and receiving unit 220 may also receive a plurality of quasi co-location (QCL) parameters for a control resource set (CORESET). When at least one of a physical downlink shared channel (PDSCH) and the CORESET meets a condition, the control unit 210 may also use at least one of the plurality of QCL parameters for at least one QCL assumption of the PDSCH.

[0399] The CORESET may also have the lowest ID.

[0400] For any CORESET whose pool index value is not set to "1" and any code point of the sending setting indication (TCI) field is not mapped to two TCI states, if the PDSCH satisfies the above conditions, the control unit 210 may also use one of the above multiple QCL parameters for a QCL assumption of the above PDSCH.

[0401] For at least one CORESET whose pool index value is set to "1", or at least one code point of the transmission setting indication (TCI) field is mapped to two TCI states, when the PDSCH satisfies the above conditions and the PDSCH is repeatedly transmitted, the control unit 210 may also use the multiple QCL parameters for multiple QCL assumptions of the PDSCH respectively.

[0402] (Hardware Structure)

[0403] 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 devices that are physically or logically separated can be directly or indirectly (for example, by wired, wireless, etc.) connected 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.

[0404] 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 is not particularly limited.

[0405] 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.13 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0406] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. are interchangeable. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0407] 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.

[0408] 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 controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0409] 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 above-mentioned control unit 110 (210), the sending and receiving unit 120 (220), etc. may also be implemented by the processor 1001.

[0410] In addition, the processor 1001 reads the program (program code), 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 enables 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 same can be implemented for other functional blocks.

[0411] 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.

[0412] 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)), a digital versatile disk, a 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.

[0413] 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 called 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 can 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. can also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) can also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0414] 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 implements 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).

[0415] 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 using a single bus or different buses may be used between the devices.

[0416] 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.

[0417] (Variation Example)

[0418] 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 also be replaced with each other. 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 standard applied. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0419] A wireless 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 wireless 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).

[0420] Here, the parameter set may also refer to 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.

[0421] 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.

[0422] A time slot may also include 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 called 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.

[0423] 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 interchangeable.

[0424] For example, a subframe may also be referred to as a TTI, a plurality of consecutive subframes may also be referred to as a TTI, and a time slot or a mini time slot may also 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 also be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0425] 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.

[0426] TTI can be a transmission time unit for a data packet (transport block), code block, code word, etc. that has been channel-coded, or a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, code block, code word, etc. is actually mapped may be shorter than the TTI.

[0427] In addition, when a time slot or a mini time slot is called TTI, more than one TTI (i.e., more than one time slot or more than one mini time slot) can 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 can also be controlled.

[0428] 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.

[0429] In addition, a long TTI (e.g., normal TTI, subframe, etc.) may be replaced by a TTI having a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) may be replaced by a TTI having a TTI length shorter than that of the long TTI and longer than 1 ms.

[0430] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the parameter set, for example, 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0431] 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.

[0432] 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.

[0433] In addition, a resource block may also be composed of one or more resource elements (RE). For example, one RE may also be a radio resource region of one subcarrier and one symbol.

[0434] A Bandwidth Part (BWP) (also referred to as a partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, a common RB may also be identified by an index of the RB relative to a common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0435] 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.

[0436] At least one of the configured BWPs may be activated, and the UE may not assume that it transmits or receives a specific signal / channel other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0437] 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 in each 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.

[0438] 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.

[0439] 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.

[0440] 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.

[0441] Furthermore, 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.

[0442] 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 appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0443] 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.

[0444] 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)).

[0445] 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).

[0446] The determination can be made by a value represented by a bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a specific value).

[0447] 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 modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0448] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when 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.

[0449] 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.

[0450] 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", "transmission 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.

[0451] 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-micro cell, and micro-micro cell.

[0452] 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 provides communication services within the coverage area.

[0453] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” are used interchangeably.

[0454] There are also cases 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.

[0455] 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 carried in a mobile body, a mobile body, etc. The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous driving 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 when performing a communication operation. 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.

[0456] In addition, the base station in the present disclosure may also be replaced by 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 replaced by terms corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0457] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0458] In the present disclosure, operations are assumed to be performed by a base station, and sometimes by its upper node depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by a 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.

[0459] 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, sequences, flow charts, etc. of the various methods / implementations described in this disclosure may be reversed 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.

[0460] The various modes / implementations described in the present disclosure may also 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) (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 expanded based on them. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0461] The term “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the term “based on” means both “based only on” and “based at least on”.

[0462] 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.

[0463] The term "determining" used in the present 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 considered to be "determining".

[0464] In addition, "judgment (decision)" may also be a situation where receiving (for example, receiving information), sending (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0465] In addition, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, comparing, etc. are considered as "judgment (decision)". In other words, "judgment (decision)" can also refer to situations where some actions are considered as "judgment (decision)".

[0466] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0467] The “maximum transmit power” recorded in the present disclosure may mean 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 UE maximum transmit power).

[0468] The terms "connected", "coupled", or all their variations used in this disclosure mean all direct or indirect connections or combinations between two or more elements, and may include the situation where there are one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The combination or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may also be replaced by "access".

[0469] In the present disclosure, when two elements are connected, it can be considered that they are "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0470] 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 way as "different".

[0471] In the present disclosure, when the terms "include", "including", and variations thereof are used, these terms, like the term "comprising", have an inclusive meaning. Furthermore, the term "or" used in the present disclosure does not mean an exclusive OR.

[0472] 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 a plural form.

[0473] 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 medium access control control element (MAC CE) indicating multiple transmission setting indication states (TCI states) for a control resource set (CORESET); and a control unit, which controls to receive the PDSCH using at least one of the plurality of TCI states when a physical downlink shared channel (PDSCH) is scheduled through downlink control information (DCI) in the CORESET and the DCI does not have a transmission configuration indication field (TCI field) and when a time offset between the DCI and the PDSCH is greater than a threshold, When the PDSCH is received through a single transmission and reception point, i.e., a single TRP, the control unit controls the use of the first TCI state among the multiple TCI states to receive the PDSCH; when the PDSCH is received through multiple TRPs, the control unit controls the use of the multiple TCI states to receive the PDSCH.

2. A wireless communication method, which is a wireless communication method of a terminal, comprising: The step of receiving a medium access control control element (MAC CE) indicating multiple transmission setting indication states (TCI states) for a control resource set (CORESET); and In a case where a physical downlink shared channel (PDSCH) is scheduled by downlink control information (DCI) in the CORESET and the DCI does not have a transmission setting indication field (TCI field), and a time offset between the DCI and the PDSCH is greater than a threshold, a step of controlling to receive the PDSCH using at least one of the plurality of TCI states, When the PDSCH is received through a single transmission and reception point, i.e., a single TRP, control is performed to use the first TCI state among the multiple TCI states to receive the PDSCH. When the PDSCH is received through multiple TRPs, control is performed to use the multiple TCI states to receive the PDSCH.

3. A base station, comprising: A sending unit, sending a medium access control control element (MAC CE) indicating multiple transmission setting indication states (ie, multiple TCI states) for a control resource set (CORESET); and a control unit, which controls to use at least one of the plurality of TCI states to send the PDSCH when a physical downlink shared channel (PDSCH) is scheduled by downlink control information (DCI) in the CORESET and the DCI does not have a transmission setting indication field (TCI field) and when a time offset between the DCI and the PDSCH is greater than a threshold, When the PDSCH is sent through a single transmission and reception point, i.e., a single TRP, the control unit controls the use of the first TCI state among the multiple TCI states to send the PDSCH; when the PDSCH is sent through multiple TRPs, the control unit controls the use of the multiple TCI states to send the PDSCH.

4. A system having a terminal and a base station, The terminal has: A receiving unit receives a medium access control control element (MAC CE) indicating multiple transmission setting indication states (TCI states) for a control resource set (CORESET); and a control unit, which controls to receive the PDSCH using at least one of the plurality of TCI states when a physical downlink shared channel (PDSCH) is scheduled through downlink control information (DCI) in the CORESET and the DCI does not have a transmission configuration indication field (TCI field) and when a time offset between the DCI and the PDSCH is greater than a threshold, The control unit controls the PDSCH to be received using the first TCI state among the multiple TCI states when the PDSCH is received through a single transmission and reception point, i.e., a single TRP, and controls the PDSCH to be received using the multiple TCI states when the PDSCH is received through multiple TRPs. The base station has: A sending unit, wherein the sending unit sends the MAC CE.

Images