Terminal, wireless communication method, and base station

Abstract

A terminal according to an aspect of the present disclosure includes: a receiving unit that receives a plurality of quasi co-location parameters, i.e., a plurality of QCL parameters, for a control resource set, i.e., a CORESET; and a control unit that, when at least one of a physical uplink control channel, i.e., a PUCCH, and the CORESET satisfies a condition, uses at least one of the plurality of QCL parameters for at least one spatial relation of the PUCCH. According to an aspect of the present disclosure, information related to 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 a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized for the purpose of further high-speed data rates, low latency, etc. (Non-Patent Document 1). In addition, for the purpose of further large capacity and high performance of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9), LTE-Advanced (3GPP Rel. 10-14) has been standardized.

[0003] Research is also underway on a successor system to LTE (for example, also referred to as the 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later, etc.).

[0004] Prior Art Documents

[0005] Non-Patent Documents

[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), it is being studied that a user terminal (terminal, user terminal, User Equipment (UE)) controls transmission and reception processing based on information related to Quasi-Co-Location (QCL) (QCL assumption / Transmission Configuration Indication (TCI) state / spatial relationship).

[0009] However, there are cases where the information related to QCL is not clear. If the information related to QCL is not clear, there is a concern that the communication quality and throughput may decrease.

[0010] Therefore, one of the purposes 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 the Problem

[0012] A terminal according to one embodiment of the present disclosure includes: a receiving unit that receives a plurality of quasi-co-location parameters, i.e., a plurality of QCL parameters, for a control resource set, i.e., a CORESET; and a control unit that, when at least one of a physical uplink control channel, i.e., a PUCCH, and the CORESET satisfies a condition, uses at least one of the plurality of QCL parameters for at least one spatial relationship of the PUCCH.

[0013] Effects of the Invention

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

[0015] Figure 1A And Figure 1B is a diagram showing an example of a default spatial relationship for PUSCH according to Mode 1-1.

[0016] Figure 2 is a diagram showing an example of a default spatial relationship for PUSCH according to Mode 1-2.

[0017] Figure 3A And Figure 3B is a diagram showing an example of a default spatial relationship for PUSCH according to Mode 2-1.

[0018] Figure 4 is a diagram showing an example of a default spatial relationship for PUSCH according to Mode 2-2.

[0019] Figure 5A And Figure 5BIt is a diagram showing an example of the default spatial relation for PUCCH related to Mode 4-1.

[0020] Figure 6 It is a diagram showing an example of the default spatial relation for PUCCH related to Mode 4-2.

[0021] Figure 7A And Figure 7B It is a diagram showing an example of the default TCI state for PDSCH related to Mode 6-1.

[0022] Figure 8 It is a diagram showing an example of the default TCI state for PDSCH related to Mode 6-2.

[0023] Figure 9A And Figure 9B It is a diagram showing an example of the default spatial relation related to the tenth embodiment.

[0024] Figure 10 It is a diagram showing an example of the schematic structure of a wireless communication system related to one embodiment.

[0025] Figure 11 It is a diagram showing an example of the structure of a base station related to one embodiment.

[0026] Figure 12 It is a diagram showing an example of the structure of a user terminal related to one embodiment.

[0027] Figure 13 It is a diagram showing an example of the hardware structure of a base station and a user terminal related to one embodiment. Detailed Embodiments

[0028] (TCI, Spatial Relation, QCL)

[0029] In NR, research is being conducted on controlling the reception processing (e.g., at least one of reception, demapping, demodulation, decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, encoding) of at least one of control signals and channels (referred to as signal / channel) in a UE based on the Transmission Configuration Indication state (TCI state).

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

[0031] The TCI state refers to information related to the Quasi-Co-Location (QCL) of a signal / channel, and can also be referred to as spatial reception parameters, spatial relation information, etc. The TCI state can also be set for the UE on a per-channel or per-signal basis.

[0032] QCL is an indicator representing the statistical properties of a signal / channel. For example, when a certain signal / channel has a QCL relationship with other signals / channels, it can also mean that among these multiple different signals / channels, at least one of Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter) can be assumed to be the same (at least one of these is QCL).

[0033] In addition, the spatial reception parameter can also correspond to the receiving beam of the UE (e.g., receiving analog beam), and the beam can also be determined based on spatial QCL. The QCL (or at least one element of QCL) in this disclosure can also be replaced by sQCL (spatial QCL).

[0034] QCL can also be defined in multiple types (QCL types). For example, four different QCL types A - D can be set such that different parameters (or parameter sets) can be assumed to be the same. The following represents these parameters (which can also be referred to as QCL parameters):

[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 parameter.

[0039] When the UE assumes that a certain control resource set (CORESET), channel, or reference signal has a specific QCL (e.g., QCL type D) relationship with other CORESETs, channels, or reference signals, it can also be referred to as a QCL assumption.

[0040] The UE can also determine at least one of the transmission beam (Tx beam) and the reception beam (Rx beam) of the signal / channel based on the TCI state or QCL assumption of the signal / channel.

[0041] The TCI state can also be, for example, information related to the QCL of the channel that is the object (in other words, the reference signal (Reference Signal (RS)) used for this channel) and other signals (for example, other RSs). The TCI state can also be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

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

[0043] The channel for which the TCI state or spatial relationship is set (specified) can also be 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 has a QCL relationship with this channel can also be at least one of a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a CSI-RS for tracking (also referred to as a tracking reference signal (Tracking Reference Signal (TRS))), and a reference signal for QCL detection (also referred to as QRS).

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

[0046] The RS of QCL type X for a TCI state may also mean an RS that is in a QCL type X relationship with a certain channel / signal (DMRS of it), and this RS may also be referred to as the QCL source of QCL type X for this TCI state.

[0047] (Path loss RS)

[0048] Path loss PL in the transmit power control of PUSCH, PUCCH, and SRS respectively b，f，c (q d ) [dB] Index q of the reference signal (RS, Pathloss Reference RS) used for the downlink BWP associated with the active UL BWP b of carrier f of serving cell c d , calculated by the UE. In this disclosure, the path loss reference RS, pathloss (PL)-RS, index q d , the RS used in path loss calculation, and the RS resource used in path loss calculation may also be used interchangeably. In this disclosure, calculate, estimate, measure, track may also be used interchangeably.

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

[0050] In the case where the path loss reference signal (RS) is updated by MAC CE, the path loss measurement based on L1-RSRP can also be applied. At the available timing after the MAC CE for updating the path loss RS, the higher layer filtered RSRP can also be used for path loss measurement, and the L1-RSRP is used for path loss measurement before applying the higher layer filtered RSRP. At the available timing after the MAC CE for updating the path loss RS, the higher layer filtered RSRP can also be used for path loss measurement, and the higher layer filtered RSRP of the previous path loss RS is used before this timing. Similar to the operation of Rel.15, the higher layer filtered RSRP is used for path loss measurement, and the UE can also track all the path loss RS candidates configured by RRC. The maximum number of path loss RS that can be configured by RRC can also depend on the UE capability. When the maximum number of path loss RS that can be configured by RRC is X, the path loss RS candidates below X can also be configured by RRC, and the path loss RS is selected from the configured path loss RS candidates by MAC CE. The maximum number of path loss RS that can be configured by RRC can also be 4, 8, 16, 64, etc.

[0051] In this disclosure, the higher layer filtered RSRP, the filtered RSRP, and the layer 3 filtered RSRP can also be used interchangeably.

[0052] (Default TCI state / default spatial relation / default PL-RS)

[0053] In RRC connected mode, in both cases where the TCI information (higher layer parameter TCI-PresentInDCI) in the DCI is set to "valid (enabled)" and where the TCI information in the DCI is not configured, when the time offset between the reception of the DL DCI (the DCI scheduling the PDSCH) and the corresponding PDSCH (the PDSCH scheduled by this DCI) is less than the threshold (timeDurationForQCL) (application condition, first condition), in the case of non-cross-carrier scheduling, the TCI state of the PDSCH (default TCI state) can also be the TCI state of the lowest CORESET ID in the latest time slot within the active DL BWP of this (specific UL signal) CC. In cases where this is not true, the TCI state of the PDSCH (default TCI state) can also be the TCI state of the lowest TCI state ID of the PDSCH within the active DL BWP of the scheduled CC.

[0054] In Rel.15, each MAC CE for activation / deactivation of PUCCH spatial relation and each MAC CE for activation / deactivation of 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 PUCCH spatial relation and the MAC CE for activation / deactivation of SRS spatial relation may not be used.

[0056] When neither the spatial relation for PUCCH nor the PL-RS is configured in FR2 (application condition, second condition), the default assumptions for the spatial relation and the PL-RS (default spatial relation and default PL-RS) are applied to PUCCH. When neither the spatial relation for SRS (SRS resource for SRS, or SRS resource corresponding to the SRI in DCI format 0_1 for scheduling PUSCH) nor the PL-RS is configured in FR2 (application condition, second condition), the default assumptions for the spatial relation and the PL-RS (default spatial relation and default PL-RS) are applied to the PUSCH and SRS scheduled by DCI format 0_1.

[0057] When a CORESET is configured in the activated DL BWP on this CC (application condition), the default spatial relation and the 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. When no CORESET is configured in the activated DL BWP on this CC, the default spatial relation and the default PL-RS may also be the activated TCI state of the PDSCH with the lowest ID in the activated DL BWP.

[0058] In Rel.15, the spatial relation of the PUSCH scheduled by DCI format 0_0 follows the spatial relation of the PUCCH resource with the lowest PUCCH resource ID among the activated spatial relations of the PUCCH on the same CC. Even when PUCCH is not transmitted on the SCell, the network needs to update the PUCCH spatial relations on all SCells.

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

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

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

[0062] (Multi-TRP)

[0063] In NR, it is being studied that one or more Transmission / Reception Points (TRPs) (multi TRP (MTRP)) use one or more panels for DL transmission to the UE. In addition, it is being studied that the UE uses one or more panels for UL transmission to one or more TRPs.

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

[0065] Multiple TRPs (e.g., TRP#1, #2) can also be connected via ideal / non-ideal backhaul to exchange information, data, etc. Different codewords (Code Word (CW)) and different layers can be transmitted from each TRP of the multiple TRPs. As a way of multi-TRP transmission, Non-Coherent Joint Transmission (NCJT) can also be used.

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

[0067] In addition, multiple PDSCHs (multi-PDSCH) by NCJT can also be defined to partially or completely overlap with respect to at least one of the time domain and the frequency domain. That is, 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 overlap.

[0068] These first PDSCH and second PDSCH can also be considered not to be in a Quasi-Co-Location (QCL) relationship (not quasi-co-located). The reception of the multi-PDSCH can also be replaced by the simultaneous reception of PDSCHs that are not of a certain QCL type (e.g., QCL type D).

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

[0070] According to such a multi-TRP scenario, more flexible transmission control using a good-quality channel can be performed.

[0071] To support intra-cell (intra-cell, with the same cell ID) and inter-cell (inter-cell, with different cell IDs) multi-TRP transmission based on multiple PDCCHs, in the RRC configuration information for multiple pairs of PDCCHs and PDSCHs that link multiple TRPs, one control resource set (CORESET) within the PDCCH configuration information (PDCCH-Config) can also correspond to one TRP.

[0072] (Problems of PUSCH)

[0073] For channels other than PDSCH (PDCCH, PUSCH, and PUCCH) that use at least one of multi-TRP and multi-panel, functions for improving reliability and robustness are being studied. For example, repetition of PDCCH, PUCCH, and PUSCH using multi-TRP is being studied.

[0074] For a PUSCH scheduled by DCI format 0_0 on a cell, if the spatial relation corresponding to the dedicated PUCCH resource with the lowest ID within the activated UL BWP of the cell can be applied, the UE follows this spatial relation to transmit the PUSCH.

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

[0076] For a PUSCH scheduled by DCI format 0_0 on a cell, when the activation parameters (higher layer parameter enableDefaultBeamPlForPUSCH0_0) of the default beam and PL-RS for the PUSCH scheduled by DCI format 0_0 are set to "valid (enabled)", the UE is not configured with PUCCH resources on the activated UL BWP, and the UE is in the RRC connected mode, if the RS of "QCL type D" corresponding to the QCL assumption of the CORESET with the lowest ID on the activated DL BWP of the cell can be utilized, the UE follows the associated spatial relation to transmit the PUSCH.

[0077] For a PUSCH scheduled by DCI format 0_0 on a cell, the default beam used for the PUSCH scheduled by DCI format 0_0 and the activation parameter of the PL-RS (the higher layer parameter enableDefaultBeamPlForPUSCH0_0) are set to "valid (enabled)". The UE is set to activate the PUCCH resources on the UL BWP, where no spatial relation among all the PUCCH resources is set. When the UE is in the RRC connected mode and more than one CORESET is set on the cell, if the UE can utilize the RS with "QCL type D" corresponding to the QCL assumption of the CORESET with the lowest ID on the activated DL BWP of the cell, the UE transmits the PUSCH following the associated spatial relation.

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

[0079] When the repeated use of PDCCH, PUCCH, and PUSCH with multiple TRPs is supported, there are the following problems 1 and 2.

[0080] [Problem 1]

[0081] It is being studied that multiple spatial relations are allocated for one PUCCH resource or multiple PUCCH resources of PUCCH repetitions. When the PUCCH spatial relation is used as the default beam for PUSCH, it is not clear how to define the default beam for PUSCH when multiple spatial relations are set / activated / indicated for the reference PUCCH resource.

[0082] [Problem 2]

[0083] It is being studied that multiple TCI states are allocated for one CORESET / search space. When the TCI state of the CORESET is used as the default beam for PUSCH, it is not clear how to define the default beam for PUSCH when multiple TCI states are set / activated / indicated for the reference CORESET.

[0084] (Problem of PUCCH)

[0085] When all of the following conditions 1 to 4 are satisfied, the spatial setting for PUCCH transmission from the UE is the same as the spatial setting 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 path loss reference RSs (pathlossReferenceRSs) within the PUCCH power control parameter (PUCCH-PowerControl).

[0088] [Condition 2]

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

[0090] [Condition 3]

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

[0092] [Condition 4]

[0093] If the UE is not applied with the CORESET pool index (CORESETPoolIndex) value of 1 for a CORESET either, or is provided with the CORESET pool index value of 1 for all CORESETS within the CORESET parameter (ControlResourceSet), and there is a TCI field within the DCI format of the search space set, then any code point of the TCI field is not mapped to two TCI states.

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

[0095] There are the following problems when PUCCH with multiple TRPs is repeatedly supported.

[0096] When the TCI state of the CORESET is used as the default beam for PUCCH, and multiple TCI states are set / activated / indicated for the reference CORESET, it is not clear how to define the default beam for PUCCH.

[0097] (Problem of PDSCH)

[0098] When the PDSCH is scheduled by a DCI format without a TCI field, and a threshold (timeDurationForQCL) can be applied, and the time offset between the reception of the DL DCI and the corresponding PDSCH is above the threshold, the UE assumes that the TCI state or QCL assumption for the PDSCH is the same as the TCI state or QCL assumption applied in the CORESET used in the PDCCH transmission.

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

[0100] When the (time) offset between the reception of the DL DCI and the corresponding PDSCH is less than the threshold (timeDurationForQCL), the UE assumes that the DM-RS ports of the PDSCH of the serving cell are QCL with the RS related to the QCL parameters used in the PDCCH QCL indication of a specific CORESET. The specific CORESET is the CORESET with the lowest CORESET ID (controlResourceSetId) within the latest time slot in which one or more CORESETS within the active BWP of the serving cell are monitored by the UE and that is associated with the monitored search space.

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

[0102] In addition, it is being studied that the QCL for PDSCH follows the QCL of the CORESET with the lowest ID.

[0103] When PDCCH using multiple TRPs is repeatedly supported, the following problem exists.

[0104] When the TCI state of the CORESET is used as the default beam for PDSCH, it is not clear how to define the default beam for PDSCH when multiple TCI states are set / activated / indicated for the reference CORESET.

[0105] Therefore, the inventors of the present invention have come up with a method for determining the default beam.

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

[0107] Hereinafter, embodiments related to the present disclosure will be described in detail with reference to the drawings. The structures described in the respective embodiments can be applied individually or in combination.

[0108] In the present disclosure, "A / B" and "at least one of A and B" can also be replaced with each other. In the present disclosure, cell, CC, carrier, BWP, DL BWP, UL BWP, active DL BWP, active UL BWP, and band can also be replaced with each other. In the present disclosure, index, ID, indicator, and resource ID can also be replaced with each other. In the present disclosure, support, control, be able to control, operate, and be able to operate can also be replaced with each other.

[0109] In the present disclosure, configure, activate, update, indicate, enable, and specify can also be replaced with each other.

[0110] In the present disclosure, MAC CE and activate / deactivate command can also be replaced with each other.

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

[0112] MAC signaling can also use, for example, MAC Control Element (MAC CE), MAC Protocol Data Unit (PDU), etc. Broadcast information can also be, for example, Master Information Block (MIB), System Information Block (SIB), 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 receive filter, UE spatial domain receive filter, UE receive beam, DL beam, DL receive beam, DL precoding, DL precoder, DL-RS, RS of QCL type D of TCI state / QCL assumption, RS of QCL type A of TCI state / QCL assumption, spatial relationship, spatial domain transmit filter, UE spatial domain transmit filter, UE transmit beam, UL beam, UL transmit beam, UL precoding, UL precoder, PL-RS may also be replaced with each other. In the present disclosure, QCL type X-RS, DL-RS associated with QCL type X, DL-RS having QCL type X, source of DL-RS, SSB, CSI-RS, SRS may also be replaced with each other.

[0114] In the present disclosure, panel, uplink (UL) transmission entity, TRP, spatial relationship, control resource set (CORESET), PDSCH, codeword, base station, antenna port of a certain signal (e.g., demodulation reference signal (DMRS) port), antenna port group of a certain signal (e.g., DMRS port group), group for multiplexing (e.g., code division multiplexing (CDM) group, reference signal group, CORESET group), CORESET pool, CW, redundancy version (RV), layer (MIMO layer, transmission layer, spatial layer) may also be replaced with each other. In addition, panel identifier (ID) and panel may also be replaced with each other. In the present disclosure, TRP ID and TRP may also be replaced with each other.

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

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

[0117] · DMRS corresponding to the scheduled PDSCH / PUSCH (e.g., sequence, resource, CDM group, DMRS port, DMRS port group, antenna port group, etc. of the DMRS).

[0118] · The DMRS corresponding to the PDCCH that has received DCI (e.g., the sequence, resources, CDM group, DMRS ports, DMRS port groups, etc. of the DMRS).

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

[0120] · The RS (RS related group, etc.) used in TCI state, QCL assumption, spatial relation information, etc.

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

[0122] In the present disclosure, it can also be envisioned that a single PDCCH is supported in the case of multiple TRPs using an ideal backhaul. It can also be envisioned that multiple PDCCHs are supported in the case of multiple TRPs using a non-ideal backhaul.

[0123] In addition, the ideal backhaul can also be referred to as DMRS port group type 1, reference signal related group type 1, antenna port group type 1, CORESET pool type 1, etc. The non-ideal backhaul can also be referred to as DMRS port group type 2, reference signal related 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, a single TRP, a single TRP system, a single TRP transmission, and a single PDSCH can also be used interchangeably. In the present disclosure, multiple TRPs, multiple TRP systems, multiple TRP transmissions, and multiple PDSCHs can also be used interchangeably. In the present disclosure, a single DCI, a single PDCCH, multiple TRPs based on a single DCI, and two TCI states on at least one activated TCI code point can also be used interchangeably.

[0125] In the present disclosure, a single TRP, a channel using a single TRP, a channel using one TCI state / spatial relation, a multi-TRP not activated by RRC / DCI, multiple TCI states / spatial relations not activated by RRC / DCI, a CORESET pool index (CORESETPoolIndex) value not set to 1 for any CORESET, and any code point of the TCI field not mapped to two TCI states can also be mutually replaced.

[0126] In the present disclosure, a multi-TRP, a channel using a multi-TRP, a channel using multiple TCI states / spatial relations, a multi-TRP activated by RRC / DCI, multiple TCI states / spatial relations activated by RRC / DCI, at least one of a multi-TRP based on a single DCI and a multi-TRP based on multiple DCIs can also be mutually replaced. In the present disclosure, a multi-TRP based on multiple DCIs, a CORESET pool index (CORESETPoolIndex) value set to 1 for a CORESET can also be mutually replaced. In the present disclosure, a multi-TRP based on a single DCI, at least one code point of the TCI field mapped to two TCI states can also be mutually replaced.

[0127] (Wireless communication method)

[0128] In the present disclosure, a reference PUCCH resource, a specific PUCCH resource, and a dedicated PUCCH resource with the lowest ID within the activated UL BWP of the cell can also be mutually replaced.

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

[0130] In the present disclosure, a condition, an application condition, and at least one application condition in the first to tenth embodiments can also be mutually replaced.

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

[0132] <First Embodiment>

[0133] When the PUCCH spatial relation information is used as the default spatial relation for PUSCH, multiple spatial relations can also be set / activated / indicated for the reference PUCCH resource (the PUCCH resource with this PUCCH spatial relation information). The PUSCH applying this default spatial relation can also follow at least one of the following Method 1-1 and Method 1-2.

[0134] 《Method 1-1》

[0135] The PUSCH can also be a single-TRP PUSCH.

[0136] For a single-TRP PUSCH, when the UE can apply at least one of the following spatial relations 1 and 2, the UE can also follow this spatial relation to transmit the PUSCH.

[0137] [Spatial relation 1]

[0138] The first spatial relation set / activated / indicated for the dedicated PUCCH resource (reference PUCCH resource) with the lowest ID within the activated UL BWP of this cell. In Figure 1A 's example, the UE uses the first spatial relation among the multiple spatial relations of the reference PUCCH resource as the default spatial relation / default PL-RS for the single-TRP PUSCH.

[0139] [Spatial relation 2]

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

[0141] When at least one of the following Application Conditions 1 to 3 is satisfied, Method 1-1 can also be applied.

[0142] [Application Condition 1]

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

[0144] [Application Condition 2]

[0145] Multiple spatial relations are set / activated / indicated for the reference PUCCH resource.

[0146] [Application Condition 3]

[0147] The PUSCH is single-TRP PUSCH transmission.

[0148] 《Method 1-2》

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

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

[0151] [Procedure 1]

[0152] When multiple spatial relations in which the dedicated PUCCH resource with the lowest ID within the activated UL BWP for this cell can be set / activated / indicated are applicable, the UE transmits the PUSCH following the multiple spatial relations corresponding to the multiple spatial relations. The mapping order between the multiple default spatial relations and the multiple PUSCH repetitions can also be the same as the mapping order between the multiple spatial relations and the multiple PUSCH repetitions when multiple spatial relations are set / activated / indicated for PUSCH transmission. The UE can also use multiple default spatial relations in multiple repetitions.

[0153] In Figure 2 's example, the UE uses two spatial relations of the reference PUCCH resource for two default spatial relations / default PL-RSs of multi-TRP PUSCH repetition.

[0154] [Procedure 2]

[0155] The UE follows Method 1-1. The UE can also fallback to PUSCH transmission with a single spatial relation. The UE can also use one default spatial relation in multiple repetitions.

[0156] Method 1-2 can also be applied when at least one of the following Application Conditions 1 to 3 is satisfied.

[0157] [Application Condition 1]

[0158] Apply the spatial relation of the PUCCH resource as the default spatial relation of the PUSCH. For example, the PUSCH is scheduled by DCI format 0_0.

[0159] [Application Condition 2]

[0160] Multiple spatial relations are set / activated / indicated for the reference PUCCH resource.

[0161] [Application Condition 3]

[0162] The PUSCH is multi-TRP PUSCH transmission.

[0163] Method 1-2 can also be applied to at least one of the single DCI-based multi-TRP PUSCH repetition and the multi-DCI-based multi-TRP PUSCH repetition.

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

[0165] <Second Embodiment>

[0166] When the QCL assumption of the CORESET is used as the default spatial relation for PUSCH, multiple TCI states can also be set / activated / indicated for the reference CORESET (the CORESET with this QCL assumption). The PUSCH applying this default spatial relation can also follow at least one of the following Method 2-1 and Method 2-2.

[0167] <Method 2-1>

[0168] The PUSCH can also be a single-TRP PUSCH.

[0169] For a single-TRP PUSCH, when the UE can apply the spatial relation related to the RS with "QCL type D" corresponding to at least one of the following QCL assumptions 1 and 2, the UE can also follow this spatial relation to transmit the PUSCH.

[0170] [QCL assumption 1]

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

[0172] [QCL assumption 2]

[0173] The TCI state with the lowest TCI state ID set / activated / indicated for the CORESET with the lowest ID on the activated DL BWP of this cell (reference CORESET). 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 as the default spatial relation / default PL-RS for the single-TRP PUSCH.

[0174] In the case where at least one of the following application conditions 1 to 3 is satisfied, Method 2-1 can also be applied.

[0175] [Application Condition 1]

[0176] The QCL assumption of the CORESET is used as the default spatial relation of the PUSCH. For example, the PUSCH is scheduled by DCI format 0_0 and no PUCCH resource is configured. For example, the PUSCH is scheduled by DCI format 0_0 and no spatial relation is configured for the PUCCH resource.

[0177] [Application Condition 2]

[0178] Multiple TCI states are configured / activated / indicated for the reference CORESET.

[0179] [Application Condition 3]

[0180] The PUSCH is single-TRP PUSCH transmission.

[0181] [Method 2-2]

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

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

[0184] [Procedure 1]

[0185] In the case where multiple spatial relations related to the RS of "QCL type D" corresponding to the QCL assumption of multiple TCI states configured / activated / indicated for the CORESET with the lowest ID on the activated DL BWP of the cell can be applied, the UE follows the multiple spatial relations to transmit the PUSCH. The mapping order between the multiple default spatial relations and the multiple PUSCH repetitions can also be the same as the mapping order between the multiple spatial relations and the multiple PUSCH repetitions in the case where multiple spatial relations are configured / activated / indicated for the PUSCH transmission. The UE can also use multiple default spatial relations in multiple repetitions.

[0186] In Figure 4 's example, the UE uses two TCI states of the reference CORESET for two default spatial relations / default PL-RS of the multi-TRP PUSCH repetition.

[0187] [Procedure 2]

[0188] The UE follows Method 2-1. The UE can also fallback to PUSCH transmission with a single spatial relation. The UE can also use one default spatial relation in multiple repetitions.

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

[0190] [Application Condition 1]

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

[0192] [Application Condition 2]

[0193] Multiple TCI states are configured / activated / indicated for the reference CORESET.

[0194] [Application Condition 3]

[0195] The PUSCH is multi-TRP PUSCH transmission.

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

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

[0198] <Third Embodiment>

[0199] UE capabilities indicating at least one of the following capabilities 1 to 4 related to at least one of the first and second embodiments can also be specified.

[0200] [Capability 1]

[0201] Whether the UE supports one of multiple spatial relations of the PUCCH resource used as the default spatial relation for the PUSCH (Mode 1-1).

[0202] [Capability 2]

[0203] Whether the UE supports multiple spatial relations of the PUCCH resource used as multiple default spatial relations for the PUSCH (Mode 1-2).

[0204] [Capability 3]

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

[0206] [Capability 4]

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

[0208] In at least one case where the UE reports the corresponding UE capability for at least one function in the first and second embodiments and the UE is configured / activated / indicated with the corresponding higher-layer parameter, the UE may also apply the function. In cases where this is not so, the UE may also not apply the function.

[0209] According to the above third embodiment, the UE can maintain compatibility with existing specifications and appropriately use the default spatial relation for PUSCH.

[0210] <Fourth Embodiment>

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

[0212] <Method 4-1>

[0213] The PUCCH may also be a single-TRP PUCCH.

[0214] For a single-TRP PUCCH, the UE may also use the same spatial relation as the TCI state for PDCCH reception that follows at least one of the following TCI states 1 and 2 to transmit the PUCCH.

[0215] [TCI State 1]

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

[0217] [TCI State 2]

[0218] The TCI state with the lowest TCI state ID configured / activated / indicated for the CORESET (reference CORESET) with the lowest ID on the activated DL BWP of this cell. In Figure 5BIn the example, the UE uses the TCI state with the lowest TCI state ID among multiple TCI states of the CORESET for the default spatial relation / 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 satisfied.

[0220] [Application condition 1]

[0221] The QCL assumption of the CORESET is used as the default spatial relation of the PUCCH. For example, in the case where the PUCCH resource is not set with PUCCH spatial relation information (PUCCH-SpatialRelationInfo). For example, the PL-RS is not set.

[0222] [Application condition 2]

[0223] Multiple TCI states are set / activated / indicated for the reference CORESET.

[0224] [Application condition 3]

[0225] The PUCCH is single-TRP PUCCH transmission.

[0226] 《Mode 4-2》

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

[0228] For multi-TRP PUCCH repetition, the UE can also follow at least one of the following procedures 1 and 2.

[0229] [Procedure 1]

[0230] Use the same multiple spatial relations as those used for receiving PDCCH that follow the multiple TCI states set / activated / indicated for the CORESET with the lowest ID on the activated DL BWP of this cell to transmit the PUCCH. The mapping order between the multiple default spatial relations and the multiple PUCCH repetitions can also be the same as the mapping order between the multiple spatial relations and the multiple PUCCH repetitions when multiple spatial relations are set / activated / indicated for PUCCH transmission. The UE can also use multiple default spatial relations in multiple repetitions.

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

[0232] [Procedure 2]

[0233] The UE follows Mode 4-1. The UE can also fallback to PUCCH transmission with a single spatial relation. The UE can also use a default spatial relation in multiple repetitions.

[0234] Mode 4-2 can also be applied when at least one of the following Application Conditions 1 to 3 is satisfied.

[0235] [Application Condition 1]

[0236] The QCL assumption of the CORESET is used as the default spatial relation of the PUCCH. For example, the PUCCH resource is not configured with PUCCH spatial relation information (PUCCH-SpatialRelationInfo). For example, no PL-RS is configured.

[0237] [Application Condition 2]

[0238] The reference CORESET is configured / activated / indicated with multiple TCI states.

[0239] [Application Condition 3]

[0240] The PUCCH is multi-TRP PUCCH transmission.

[0241] According to the above Fourth Embodiment, the QCL assumption of the CORESET can be appropriately used as the default spatial relation for the PUCCH.

[0242] <Fifth Embodiment>

[0243] UE capabilities indicating at least one of the following Capabilities 1 and 2 related to at least one of the Third Embodiment can also be defined.

[0244] [Capability 1]

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

[0246] [Capability 2]

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

[0248] In at least one of the cases where the UE reports the corresponding UE capability for at least one function in the Fourth Embodiment and the UE is configured / activated / indicated with the corresponding higher layer parameter, the UE can also apply the function. In cases where this is not the case, the UE can also not apply the function.

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

[0250] <Sixth Embodiment>

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

[0252] <Method 6-1>

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

[0254] In the case of a single-TRP PDSCH, when the PDSCH is scheduled by a DCI format without a TCI field, and when the time offset between the reception of the DL DCI and the corresponding PDSCH is greater than or equal to a threshold (timeDurationForQCL), the UE can also assume that the TCI state or QCL assumption for the 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. In Figure 7A 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 set / activated / indicated for the CORESET (reference CORESET) used for PDCCH transmission. In Figure 7B the example, the UE uses the TCI state with the lowest TCI state ID among the multiple TCI states of the reference CORESET as the default TCI state for the single-TRP PDSCH.

[0259] In the case where the time offset between the reception of the DL DCI and the corresponding PDSCH for a single-TRP PDSCH is less than the threshold (timeDurationForQCL), the UE may also assume that the TCI state for the PDSCH or the QCL assumption is the same as at least one of the following QCL parameters 1 and 2 (it may also be assumed that the DM-RS ports of the PDSCH of the serving cell are QCL with the RSs related to at least one of the following QCL parameters 1 and 2).

[0260] [QCL parameter 1]

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

[0262] [QCL parameter 2]

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

[0264] In the case where at least one of the following application conditions 1 and 2 is satisfied, Method 6-1 may also be applied.

[0265] [Application condition 1]

[0266] Multiple TCI states are set / activated / indicated for the reference CORESET.

[0267] [Application condition 2]

[0268] The PDSCH is a single-TRP PDSCH transmission.

[0269] 《Method 6-2》

[0270] The PDSCH may also be a multi-TRP PDSCH repetition.

[0271] In the case where the PDSCH is scheduled by a DCI format without a TCI field for a multi-TRP PDSCH repetition and the time offset between the reception of the DL DCI and the corresponding PDSCH is greater than or equal to the threshold (timeDurationForQCL), the UE may also follow at least one of the following procedures 1 and 2.

[0272] [Procedure 1]

[0273] The QCL assumptions for multiple TCI states for the PDSCH that the UE assumes are the same as the multiple TCI states / QCL assumptions configured / activated / indicated for the CORESET used for the PDCCH. 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 where multiple TCI states are configured / activated / indicated for PDSCH transmission. The UE may also use multiple default TCI states in multiple repetitions.

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

[0275] [Procedure 2]

[0276] The UE follows Method 6-1. The UE may also fallback to PDSCH transmission with a single TCI state. The UE may also use one default TCI state in multiple repetitions.

[0277] In the case where, for single-TRP PDSCH, the time offset between the reception of the DL DCI and the corresponding PDSCH is less than the threshold (timeDurationForQCL), the UE may also follow at least one of the following Procedures 1 and 2.

[0278] [Procedure 1]

[0279] The QCL assumptions for multiple TCI states for the PDSCH that the UE assumes are the same as the multiple TCI states / QCL assumptions configured / activated / indicated for the CORESET with the lowest ID on the activated DL BWP of the cell. 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 where multiple TCI states are configured / activated / indicated for PDSCH transmission. The UE may also use multiple default TCI states in multiple repetitions.

[0280] [Procedure 2]

[0281] The UE follows Method 6-1. The UE may also fallback to PDSCH transmission with a single TCI state. The UE may also use one default TCI state in multiple repetitions.

[0282] Method 6-2 may also be applied when at least one of the following Application Conditions 1 and 2 is satisfied.

[0283] [Application Condition 1]

[0284] The reference CORESET is configured / activated / indicated with multiple TCI states.

[0285] [Application condition 2]

[0286] The PDSCH is multi-TRP PDSCH transmission.

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

[0288] <Seventh Embodiment>

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

[0290] [Capability 1]

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

[0292] [Capability 2]

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

[0294] In at least one case where the UE reports the corresponding UE capability for at least one function in the sixth embodiment and / or the UE is configured / activated / indicated with the corresponding higher layer parameter, the UE may also apply the function. In cases where this is not so, the UE may not apply the function.

[0295] According to the above seventh embodiment, the UE can maintain compatibility with existing specifications and appropriately use the default spatial relation for the PDSCH.

[0296] <Eighth Embodiment>

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

[0298] <Method 8-1>

[0299] In at least one of the first to seventh embodiments, when the TCI state / QCL assumption of the CORESET is used as the default spatial relation / TCI state / QCL assumption for 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 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 in which one or more CORESETS are monitored by the UE.

[0300] 《Embodiment 8-2》

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

[0302] According to the above eighth embodiment, 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 Method 9-1 and Method 9-2.

[0305] 《Method 9-1》

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

[0307] 《Method 9-2》

[0308] Multiple default TCI states / spatial relations may also be explicitly set / activated / indicated. The UE may also apply the set / activated / indicated multiple default TCI states / spatial relations 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 Parameter 1 and Parameter 2.

[0310] [Parameter 1]

[0311] The first set / activated / indicated default TCI state / spatial relation.

[0312] [Parameter 2]

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

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

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

[0316] In the case where the default TCI state / spatial relation is not explicitly set / activated / indicated, the UE can also apply at least one of the first to seventh embodiments.

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

[0318] <Tenth Embodiment>

[0319] Regardless of the number of TCI states / QCL assumptions / spatial relations of the source RS of the default spatial relation, the number of TCI states / QCL assumptions / spatial relations of the target RS can always be one.

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

[0321] In Figure 9A 's example, in the case where a CORESET is set within a CC, the default spatial relation and the default PL-RS are the TCI state of the CORESET with the lowest CORESET ID among the multiple activated TCI states of the PDCCH. In Figure 9B 's example, in the case where no CORESET is set within a CC, the default spatial relation and the default PL-RS are the TCI state with the lowest TCI state ID among the multiple activated TCI states of the PDSCH.

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

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

[0324] (Wireless communication system)

[0325] Hereinafter, the structure of a wireless communication system according to an embodiment of the present disclosure will be described. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above-described various embodiments of the present disclosure.

[0326] Figure 10 It is a diagram showing an example of the schematic structure of a wireless communication system according to an embodiment. The wireless communication system 1 may also be a system that realizes communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the 5th generation mobile communication system New Radio (5G NR), or the like.

[0327] In addition, the wireless communication system 1 may also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple Radio Access Technologies (RATs). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0328] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (MN), and the base station (gNB) of NR is the 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 may also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR dual connectivity (NN-DC)) where both the MN and the SN are base stations (gNBs) of NR).

[0330] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a - 12c) that is configured within 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 within at least one cell. The configuration, quantity, etc. of each cell and the user terminal 20 are not limited to the manner shown in the figure. Hereinafter, without distinguishing between the base stations 11 and 12, they are collectively referred to as the base station 10.

[0331] The user terminal 20 may also be connected to at least one of the multiple base stations 10. The user terminal 20 may also utilize at least one of carrier aggregation (CA) and dual connectivity (DC) that uses multiple component carriers (CCs).

[0332] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Additionally, the frequency bands, definitions, etc. of FR1 and FR2 are not limited to these. For example, FR1 may correspond to a frequency band higher than FR2.

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

[0334] Multiple base stations 10 can also be connected via wire (e.g., optical fiber based on the Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is utilized as a backhaul between base stations 11 and 12, the base station 11 equivalent to the upper station can also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to the relay station can also be referred to as an IAB node.

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

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

[0337] In the wireless communication system 1, a wireless access method based on Orthogonal Frequency Division Multiplexing (OFDM) can also be utilized. 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. can also be utilized.

[0338] The wireless access method can also be referred to as a waveform. Additionally, in the wireless communication system 1, in the wireless access methods of the UL and the DL, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be used.

[0339] As a downlink channel, in the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc., which are shared among the user terminals 20, can also be used.

[0340] In addition, as an uplink channel, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc., which are shared among the user terminals 20, can also be used.

[0341] User data, high-layer control information, System Information Block (SIB), etc. are transmitted through the PDSCH. User data, high-layer control information, etc. can also be transmitted through the PUSCH. In addition, the Master Information Block (MIB) can also be transmitted through the PBCH.

[0342] Low-layer control information can also be transmitted through the PDCCH. The low-layer control information can also include, for example, downlink control information (Downlink Control Information (DCI)), and this downlink control information includes scheduling information of at least one of the PDSCH and the PUSCH.

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

[0344] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be utilized. The CORESET corresponds to the resource for searching DCI. The search space corresponds to the search area and search method for PDCCH candidates. One CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a certain search space based on the search space setting.

[0345] One search space can also correspond to PDCCH candidates equivalent to one or more aggregation levels. One or more search spaces can also be referred to as a search space set. Additionally, in the present disclosure, "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", etc. can also be used interchangeably.

[0346] Uplink control information (Uplink Control Information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (such as hybrid automatic repeat request acknowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) can also be transmitted through PUCCH. The random access preamble for establishing a connection with the cell can also be transmitted through PRACH.

[0347] In addition, in the present disclosure, the downlink, uplink, etc. can also be expressed without "link". Furthermore, it can also be expressed without "Physical" at the beginning of various channels.

[0348] In the wireless communication system 1, it is also possible to transmit a synchronization signal (SS), a downlink reference signal (DL-RS), etc. As the DL-RS, in the wireless communication system 1, it is also possible to transmit a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc.

[0349] The synchronization signal can also 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 an SS / PBCH block, an SS block (SS Block (SSB)), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0350] Furthermore, in the wireless communication system 1, as an uplink reference signal (UL-RS), it is also possible to transmit a reference signal for measurement (sounding reference signal (SRS)), a demodulation reference signal (DMRS), etc. In addition, DMRS may also be referred to as a UE-specific reference signal.

[0351] (Base station)

[0352] Figure 11FIG. 0 is a diagram showing an example of the structure of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission path interface (transmission line interface) 140. In addition, one or more of the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140 may be provided respectively.

[0353] In addition, in this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, and it can also be assumed that the base station 10 also has other functional blocks required for wireless communication. A part of the processing of each unit described below may also be omitted.

[0354] The control unit 110 implements overall control of the base station 10. The control unit 110 can be composed of a controller, a control circuit, etc. described based on the common knowledge in the technical field related to the present disclosure.

[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 / reception, measurement, etc. using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequence, etc. to be transmitted as signals, and forward them to the transmission / reception unit 120. The control unit 110 may also perform call processing (setting, releasing, etc.) of communication channels, state management of the base station 10, management of radio resources, etc.

[0356] The transmission / reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmission / reception unit 120 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, etc. described based on the common knowledge in the technical field related to the present disclosure.

[0357] The transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit. The transmission unit may be composed of the transmission processing unit 1211 and the RF unit 122. The reception unit may be composed of the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

[0358] The transmitting and receiving antenna 130 can be composed of an antenna that can be described based on common knowledge in the technical field related to the present disclosure, such as an array antenna.

[0359] The transmitting and receiving unit 120 can also transmit the above-mentioned downlink channels, synchronization signals, downlink reference signals, etc. The transmitting and receiving unit 120 can also receive the above-mentioned uplink channels, uplink reference signals, etc.

[0360] The transmitting and receiving unit 120 can also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0361] The transmitting and receiving unit 120 (transmission processing unit 1211) can also perform processing of the Packet Data Convergence Protocol (PDCP) layer, processing of the Radio Link Control (RLC) layer (e.g., RLC retransmission control), processing of the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0362] The transmitting and receiving unit 120 (transmission processing unit 1211) can also perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filter processing (filtering), Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, digital-to-analog conversion, etc. on the bit string to be transmitted, and output a baseband signal.

[0363] The transmitting and receiving unit 120 (RF unit 122) can also modulate the baseband signal to a radio frequency band, perform filter processing, amplification, etc., and transmit the radio frequency band signal via the transmitting and receiving antenna 130.

[0364] On the other hand, the transmitting and receiving unit 120 (RF unit 122) can also amplify, perform filter processing, demodulate to a baseband signal, etc. on the radio frequency band signal received through the transmitting and receiving antenna 130.

[0365] The transmission / reception unit 120 (reception processing unit 1212) may also apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as required), filter processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data and the like.

[0366] The transmission / reception unit 120 (measurement unit 123) may also perform measurements related to the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may also perform measurements on received power (e.g., Reference Signal Received Power (RSRP)), reception quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0367] The transmission path interface 140 may also transmit and receive signals (backhaul signaling) between the device included in the core network 30, other base stations 10, etc., and may also acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0368] In addition, the transmission unit and reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission / reception unit 120, the transmission / 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 resources for the uplink or downlink. When the physical uplink shared channel (PUSCH) and at least one of the resources satisfy the conditions, the control unit 110 may also control the reception of the PUSCH transmitted using at least one of the plurality of 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 the physical uplink control channel (PUCCH) and at least one of the CORESET satisfy the conditions, 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 the physical downlink shared channel (PDSCH) and at least one of the CORESET satisfy the conditions, 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 Equipment)

[0373] Figure 12 is a diagram showing an example of the structure of a user equipment according to an embodiment. The user equipment 20 includes a control unit 210, a transmitting and receiving unit 220, and a transmitting and receiving antenna 230. In addition, one or more of the control unit 210, the transmitting and receiving unit 220, and the transmitting and receiving antenna 230 may be provided respectively.

[0374] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it can be assumed that the user equipment 20 also has other functional blocks required for wireless communication. A part of the processing of each unit described below may also be omitted.

[0375] The control unit 210 implements the overall control of the user equipment 20. The control unit 210 can be composed of a controller, a control circuit, etc. that can be explained based on the common knowledge in the technical field related to the present disclosure.

[0376] The control unit 210 may also control the generation, mapping, etc. of signals. The control unit 210 may also control the transmission, reception, measurement, etc. using the transmitting and receiving unit 220 and the transmitting and receiving antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transmitting and receiving unit 220.

[0377] The transmission / reception unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmission processing unit 2211 and a reception processing unit 2212. The transmission / reception unit 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, etc., which are described based on the common knowledge in the technical field related to the present disclosure.

[0378] The transmission / reception unit 220 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit. The transmission unit may also be composed of a transmission processing unit 2211 and an RF unit 222. The reception unit may also be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0379] The transmission / reception antenna 230 can be composed of an antenna described based on the common knowledge in the technical field related to the present disclosure, such as an array antenna, etc.

[0380] The transmission / reception unit 220 may also receive the above-mentioned downlink channels, synchronization signals, downlink reference signals, etc. The transmission / reception unit 220 may also transmit the above-mentioned uplink channels, uplink reference signals, etc.

[0381] The transmission / reception unit 220 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of a transmission beam and a reception beam.

[0382] The transmission / reception unit 220 (transmission processing unit 2211) may, for example, also perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc., on the data, control information, etc., obtained from the control unit 210, and generate a bit string to be transmitted.

[0383] The transmission / reception unit 220 (transmission processing unit 2211) may also perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (if necessary), IFFT processing, precoding, digital-to-analog conversion, etc., on the bit string to be transmitted, and output a baseband signal.

[0384] In addition, regarding whether to apply DFT processing, it can also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when the transform precoding is effective (enabled), the transmission and reception unit 220 (transmission processing unit 2211) can also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using the DFT-s-OFDM waveform. In other cases, the transmission and reception unit 220 (transmission processing unit 2211) can also not perform DFT processing as the above-mentioned transmission processing.

[0385] The transmission and reception unit 220 (RF unit 222) can also perform modulation to the radio frequency band, filter processing, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmission and reception antenna 230.

[0386] On the other hand, the transmission and reception unit 220 (RF unit 222) can also perform amplification, filter processing, demodulation to the baseband signal, etc. on the radio frequency band signal received through the transmission and reception antenna 230.

[0387] The transmission and reception unit 220 (reception processing unit 2212) can also apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, etc. to the obtained baseband signal, and obtain user data, etc.

[0388] The transmission and reception unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 can also measure the received power (e.g., RSRP), reception quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 210.

[0389] In addition, the transmission unit and reception unit of the user terminal 20 in the present disclosure can also be composed of at least one of the transmission and reception unit 220, the transmission and reception antenna 230, and the transmission path interface 240.

[0390] The transmission and reception unit 220 can also receive multiple spatial settings for resources of the uplink or downlink. When at least one of the physical uplink shared channel (PUSCH) and the said resources meets the conditions, the control unit 210 can also use at least one of the said multiple spatial settings for at least one spatial relationship of the PUSCH.

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

[0392] When there is no pool index value set to "1" for any CORESET, and no code point of the transmission configuration indication (TCI) field is mapped to two TCI states, and the PUSCH meets the condition, the control unit 210 may also use one of the multiple spatial configurations for one spatial relation of the PUSCH.

[0393] When there is a pool index value set to "1" for at least one CORESET, or at least one code point of the transmission configuration indication (TCI) field is mapped to two TCI states, the PUSCH meets the condition, and the PUSCH is transmitted repeatedly, the control unit 210 may also use the multiple spatial configurations respectively for multiple spatial relations of the PUSCH.

[0394] The transmitting and receiving unit 220 may also receive multiple 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 condition, the control unit 210 may also use at least one of the multiple QCL parameters for at least one spatial relation of the PUCCH.

[0395] The CORESET may also have the lowest ID.

[0396] When there is no pool index value set to "1" for any CORESET, and no code point of the transmission configuration indication (TCI) field is mapped to two TCI states, and the PUCCH meets the condition, the control unit 210 may also use one of the multiple QCL parameters for one spatial relation of the PUCCH.

[0397] When there is a pool index value set to "1" for at least one CORESET, or at least one code point of the transmission configuration indication (TCI) field is mapped to two TCI states, the PUCCH meets the condition and the PUCCH is transmitted repeatedly, the control unit 210 may also use the multiple QCL parameters respectively for multiple spatial relations of the PUCCH.

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

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

[0400] When there is no pool index value set to "1" for any CORESET and no code point of the transmit configuration indicator (TCI) field is mapped to two TCI states, and the PDSCH meets the conditions, the control unit 210 may also use one of the multiple QCL parameters for one QCL assumption of the PDSCH.

[0401] When there is a pool index value set to "1" for at least one CORESET, or at least one code point of the transmit configuration indicator (TCI) field is mapped to two TCI states, the PDSCH meets the conditions and the PDSCH is repeatedly transmitted, the control unit 210 may also use the multiple QCL parameters respectively for multiple QCL assumptions of the PDSCH.

[0402] (Hardware Structure)

[0403] In addition, the block diagrams used in the description of the above - mentioned embodiments show blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. Furthermore, there is no particular limitation on the implementation method of each functional block. That is, each functional block may be implemented by a single device physically or logically combined, or may be implemented by directly or indirectly (e.g., by wire, wireless, etc.) connecting two or more physically or logically separated devices. The functional block may also be implemented by combining the above - mentioned single device or the above - mentioned multiple devices with software.

[0404] Here, in the functions, there are judgment, decision-making, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, establishment, comparison, assumption, expectation, regarded as, broadcasting, notifying, communicating, forwarding, configuration (setting), reconfiguration (re - setting), allocation (allocating, mapping), assignment, etc., but not limited to these. For example, a functional block (structural unit) that implements the transmission 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 an embodiment of the present disclosure can also function as a computer that performs the processing of the wireless communication method of the present disclosure. Figure 13 FIG. is an example showing the hardware structure of a base station and a user terminal according to an embodiment. The above - mentioned base station 10 and user terminal 20 can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0406] In addition, in the present disclosure, terms such as device, circuit, equipment, section, unit, etc. can be mutually replaced. The hardware structure of the base station 10 and the user terminal 20 can be configured to include one or more of each device shown in the figure, or can be configured not to include some devices.

[0407] For example, only one processor 1001 is shown in the figure, but there can be multiple processors. In addition, the processing can be executed by one processor, or can be executed simultaneously, sequentially, or by other means by two or more processors. In addition, the processor 1001 can also be implemented by one or more chips.

[0408] Regarding each function in the base station 10 and the user terminal 20, for example, by reading a specific software (program) into hardware such as the processor 1001 and the memory 1002, the processor 1001 performs operations and controls communication via the communication device 1004, or controls at least one of reading and writing data in the memory 1002 and the storage 1003, thereby realizing the function.

[0409] The processor 1001, for example, operates the operating system to control the entire computer. The processor 1001 may also be constituted by a central processing unit (Central Processing Unit (CPU)) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like. For example, at least a part of the above-described control unit 110 (210), transmission / reception unit 120 (220), etc. may also be implemented by the processor 1001.

[0410] In addition, the processor 1001 reads a program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes based on them. As the program, a program that causes the computer to execute at least a part of the operations described in the above-described embodiments can be used. For example, the control unit 110 (210) may also be implemented by a control program stored in the memory 1002 and operating in the processor 1001, and the same can be applied to other functional blocks.

[0411] The memory 1002 may also be a computer-readable recording medium, and is constituted by, for example, at least one of a read-only memory (Read Only Memory (ROM)), an erasable programmable read-only memory (Erasable Programmable ROM (EPROM)), an electrically erasable programmable read-only memory (Electrically EPROM (EEPROM)), a random access memory (Random Access Memory (RAM)), and 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 a program (program code), software module, etc. executable for implementing the wireless communication method according to an embodiment of the present disclosure.

[0412] The storage 1003 may also be a computer-readable recording medium, and is constituted by, for example, at least one of a flexible disc, a floppy (registered trademark) disc, an optical disc (e.g., a compact disc (Compact Disc ROM (CD-ROM))), a digital versatile disc, a Blu-ray (registered trademark) disc, a removable disc, a hard disk drive, a smart card, a flash device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0413] The communication device 1004 is hardware (a transmitting and receiving device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. In order to implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-described transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be implemented with physically or logically separated transmitting and receiving units.

[0414] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside. In addition, the input device 1005 and the output device 1006 may also have an integrated structure (e.g., a touch panel).

[0415] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be constituted by a single bus or may be constituted by different buses between each device.

[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), a Field Programmable Gate Array (FPGA), etc., and a part or all of each functional block may also be implemented with this hardware. For example, the processor 1001 may also be implemented using at least one of these hardwares.

[0417] (Variant example)

[0418] In addition, terms described in this disclosure and terms required for understanding this disclosure may also be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal can also be abbreviated as RS, and may also be referred to as a pilot, a pilot signal, etc. according to the applied standard. In addition, a component carrier (Component Carrier (CC)) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0419] A radio frame may also be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) independent of the numerology.

[0420] Here, the numerology may also be a communication parameter applied in at least one of transmission and reception of a certain signal or channel. For example, the numerology may also represent at least one of a subcarrier spacing (SubCarrier Spacing (SCS)), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (Transmission Time Interval (TTI)), the number of symbols per TTI, a radio frame structure, a specific filter process performed by a transmitter-receiver in the frequency domain, a specific windowing process performed by a transmitter-receiver in the time domain, etc.

[0421] A time slot may also be composed of one or more symbols (orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing (OFDM)) symbols, single carrier frequency division multiple access (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 the numerology.

[0422] A time slot may also include a plurality of mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of a smaller number of symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as PDSCH (PUSCH) mapping type B.

[0423] A radio frame, subframe, time slot, mini-slot, and symbol all represent time units for transmitting signals. A radio frame, subframe, time slot, mini-slot, and symbol may also use their respective other names. Additionally, time units such as frames, subframes, time slots, mini-slots, and symbols in this disclosure may also be interchangeable with each other.

[0424] For example, a subframe may also be referred to as a TTI, multiple consecutive subframes may also be referred to as a TTI, a time slot or a mini-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, may be a period shorter than 1 ms (e.g., 1 - 13 symbols), or may be a period longer than 1 ms. Additionally, the unit representing a TTI may not be referred to as a subframe, but as a time slot, mini-slot, etc.

[0425] Here, a TTI, for example, refers to the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in units of TTI. Additionally, the definition of a TTI is not limited to this.

[0426] A TTI may also be a transmission time unit for data packets (transport blocks), code blocks, codewords, etc. that have undergone channel coding, and may also become a processing unit for scheduling, link adaptation, etc. Additionally, when a TTI is given, the time interval (e.g., number of symbols) in which a transport block, code block, codeword, etc. is actually mapped may also be shorter than the TTI.

[0427] Additionally, when a time slot or a mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-slots) may also become the minimum time unit for scheduling. In addition, the number of time slots (mini-slot numbers) that make up the minimum time unit of this scheduling may 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), standard TTI, long TTI, normal subframe, standard subframe, long subframe, time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, short TTI, partial TTI, shortened subframe, short subframe, mini-slot, sub-time slot, time slot, etc.

[0429] Additionally, a long TTI (e.g., a normal TTI, subframe, etc.) may also be replaced with a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may also be replaced with a TTI having a TTI length less than that of the long TTI and 1 ms or more.

[0430] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may also include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, it may also be 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 time 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 physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, etc.

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

[0434] A bandwidth part (BWP) (which may also be referred to as a partial bandwidth, etc.) may also represent a subset of consecutive common RBs (common resource blocks) used for a certain parameter set in a certain carrier. Here, the common RBs may also be determined by the index of the RBs based on the common reference point of the carrier. A PRB may also be defined in a certain BWP and be additionally numbered within that BWP.

[0435] An UL BWP (BWP for UL) and a DL BWP (BWP for DL) may also be included in a BWP. For a UE, one or more BWPs may also be set within one carrier.

[0436] At least one of the set BWPs may also be active, and the UE may not assume to transmit and receive specific signals / channels outside the active BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0437] In addition, structures such as the above-mentioned wireless frames, sub-frames, time slots, mini time slots, and symbols are merely illustrative. For example, the number of sub-frames included in a wireless frame, the number of time slots in each sub-frame or wireless frame, the number of mini time slots included in a time slot, the symbols included in a time slot or mini time slot, the number of RBs, the number of sub-carriers included in an RB, and the number of symbols, symbol length, Cyclic Prefix (CP) length, etc. within a TTI can be changed in various ways.

[0438] In addition, the information, parameters, etc. described in this disclosure can be represented by absolute values, relative values with respect to a specific value, or can also be represented by corresponding other information. For example, a radio resource can also be indicated by a specific index.

[0439] In this disclosure, the names used for parameters, etc. are not restrictive names in all aspects. Furthermore, mathematical expressions, etc. using these parameters can also be different from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name. Therefore, the various names assigned to these various channels and information elements are not restrictive names in all aspects.

[0440] The information, signals, etc. described in this disclosure can also be represented using any one of various different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0441] In addition, information, signals, etc. can be output in at least one of the following directions: from a higher layer to a 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. can be stored in a specific location (e.g., a memory), or can be managed using a management table. The input and output information, signals, etc. can be overwritten, updated, or appended. The output information, signals, etc. can also be deleted. The input information, signals, etc. can also be sent to other devices.

[0443] Notification of information is not limited to the manners / embodiments described in this disclosure, and other methods can also be used. For example, notification of information in this disclosure can 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 can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling can also be referred to as an RRC message, and for example, it can also be an RRC Connection Setup message, an RRC Connection Reconfiguration (RRC Connection Re-setting) message, etc. In addition, MAC signaling can be notified, for example, by using a MAC Control Element (MAC CE).

[0445] In addition, notification of specific information (e.g., notification of "is X") is not limited to explicit notification, and can also be performed implicitly (e.g., by not performing the notification of the specific information, or by notification of other information).

[0446] The determination can be made by a value represented by one bit (0 or 1), can also be made by a true / false value (Boolean value) represented by true or false, and can also be made by a numerical comparison (e.g., comparison with a specific value).

[0447] Software, whether referred to as software, firmware, middleware, micro-code, hardware description language, or by any other name, should be broadly construed to mean instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, threads of execution, procedures, functions, etc.

[0448] In addition, software, instructions, information, etc. can also be sent and received via a transmission medium. For example, in the case of sending software from a website, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included in the definition of the transmission medium.

[0449] Terms such as "system" and "network" used in this disclosure can be used interchangeably. "Network" can also mean a device (e.g., a base station) included in the network.

[0450] In this disclosure, terms such as "precoding", "precoder", "weights (precoding weights)", "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", "panel", etc. can be used interchangeably.

[0451] In the present disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, femto cell, pico cell, etc.

[0452] A base station can accommodate one or more (e.g., three) cells. In the case where a base station accommodates multiple cells, the entire 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 (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides communication services within the coverage range.

[0453] In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "user device (User Equipment (UE))", "terminal" can be used interchangeably.

[0454] There are also cases where mobile stations are referred to by terms such as subscriber station, mobile unit, subscriber unit, radio unit, remote unit, mobile device, radio 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 several other appropriate terms.

[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. Additionally, at least one of the base station and the mobile station may also be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), a moving body that moves in an unmanned manner (e.g., a drone, a self-driving vehicle, etc.), or a robot (humanoid or non-humanoid). Additionally, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0456] Furthermore, the base station in the present disclosure may also be replaced by a user terminal. For example, for a structure in which communication between a base station and a user terminal is replaced by communication between multiple user terminals (e.g., it may also be referred to as Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.), the various aspects / embodiments of the present disclosure can also be applied. In this case, it may also be configured such that the user terminal 20 has the functions of the above-mentioned base station 10. Additionally, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to inter-terminal communication (e.g., "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0457] Similarly, the user terminal in the present disclosure may also be replaced by a base station. In this case, it may also be configured such that the base station 10 has the functions of the above-mentioned user terminal 20.

[0458] In the present disclosure, operations performed by the base station may sometimes be performed by its upper node according to the situation. Apparently, in a network including one or more network nodes having a base station, various operations for communicating with a terminal can be performed by the base station, one or more network nodes other than the base station (e.g., considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0459] Each mode / embodiment described in the present disclosure can be used alone, in combination, or switched during execution. In addition, the processing procedures, sequences, flowcharts, etc. of each mode / embodiment described in the present disclosure can also be rearranged as long as there is no contradiction. For example, for the methods described in the present disclosure, various step elements are presented in an illustrative order, but are not limited to the specific order presented.

[0460] Each mode / embodiment described in the present disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, the fourth-generation mobile communication system (4G), the fifth-generation mobile communication system (5G), the sixth-generation mobile communication system (6G), the xth-generation mobile communication system (xG) (x is an integer or a decimal, for example), 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, next-generation systems extended based on them, etc. In addition, multiple systems can also be combined (for example, a combination of LTE or LTE-A and 5G) for application.

[0461] As used in this disclosure, the recitation "based on" does not mean "based solely on" unless specifically stated otherwise. In other words, the recitation "based on" means both "based solely on" and "based at least on".

[0462] Any reference to an element using designations such as "first", "second", etc. used in this disclosure does not comprehensively limit the quantity or order of these elements. These designations can be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, a reference to a first and a second element does not mean that only two elements can be employed, or that the first element must in some form take precedence over the second element.

[0463] The term "determining" as used in this disclosure encompasses diverse operations in some cases. For example, "determining" can also be a case where judging, calculating, computing, processing, deriving, investigating, looking up (searching, inquiring) (such as searching in a table, database, or other data structure), ascertaining, etc. are regarded as performing "determining".

[0464] In addition, "determining" can also be a case where receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, accessing (e.g., accessing data in a memory), etc. are regarded as performing "determining".

[0465] In addition, "determining" can also be a case where resolving, selecting, choosing, establishing, comparing, etc. are regarded as performing "determining". That is, "determining" can also be a case where some actions are regarded as performing "determining".

[0466] In addition, "determining" can also be replaced by "assuming", "expecting", "considering", etc.

[0467] The "maximum transmit power" described in this disclosure can either mean the maximum value of the transmit power, or the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0468] Terms such as "connected" and "coupled" used in this disclosure, or all their variations, mean all direct or indirect connections or couplings between two or more elements, and can include the situation where there is one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The coupling or connection between elements can be physical, logical, or a combination of them. For example, "connected" can also be replaced by "access".

[0469] In this disclosure, when two elements are connected, it is possible to consider using one or more wires, cables, printed electrical connections, etc., and electromagnetic energy with wavelengths in the radio frequency range, microwave region, and optical (both visible and invisible) region, etc., as several non-limiting and non-exhaustive examples, and being "connected" or "coupled" to each other.

[0470] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other". In addition, this term can also mean "A and B are respectively different from C". Terms such as "separated" and "coupled" can also be interpreted in the same way as "different".

[0471] When using "include", "including", and their variations in this disclosure, these terms, like the term "comprising", are meant to be inclusive. Furthermore, the term "or" used in this disclosure does not mean the exclusive or.

[0472] In this disclosure, for example, in the case where articles are added through translation such as a, an, and the in English, this disclosure can also include the case where the nouns following these articles are in the plural form.

[0473] As described above, the invention related to the present disclosure has been described in detail. However, for those skilled in the art, the invention related to the present disclosure is obviously not limited to the embodiments described in the present disclosure. The invention related to the present disclosure can be implemented in the form of amendments and changes without departing from the gist and scope of the invention determined based on the description in the claims. Therefore, the description of the present disclosure is for illustrative purposes and does not carry any restrictive meaning for the invention related to the present disclosure.

Claims

1. A terminal, characterized in that, it has: a receiving unit that receives a media access control control element (MAC CE) indicating multiple transmission configuration indication (TCI) states for a control resource set (CORESET); and a control unit that, when the physical uplink control channel (PUCCH) spatial relation information is not set and the path loss reference signal is not set, and when multiple TCI states are indicated for the CORESET with the lowest ID within the activated downlink bandwidth part (DL BWP) of the cell by the MAC CE, controls to transmit the PUCCH using the spatial relation corresponding to the first TCI state among the multiple TCI states.

2. A wireless communication method for a terminal, characterized in that, it has: a step of receiving a MAC CE indicating multiple TCI states for a CORESET; and a step of, when the PUCCH spatial relation information is not set and the path loss reference signal is not set, and when multiple TCI states are indicated for the CORESET with the lowest ID within the activated DL BWP of the cell by the MAC CE, controlling to transmit the PUCCH using the spatial relation corresponding to the first TCI state among the multiple TCI states.

3. A base station, characterized in that, it has: a transmitting unit that transmits a MAC CE indicating multiple TCI states for a CORESET; and a control unit that, when the PUCCH spatial relation information is not set for a terminal and the path loss reference signal is not set, and when multiple TCI states are indicated for the CORESET with the lowest ID within the activated DL BWP of the cell by the MAC CE, controls to receive the PUCCH using the spatial relation corresponding to the first TCI state among the multiple TCI states.

4. A system having a terminal and a base station, characterized in that, the terminal has: a receiving unit that receives a MAC CE indicating multiple TCI states for a CORESET; and a control unit that, when the PUCCH spatial relation information is not set and the path loss reference signal is not set, and when multiple TCI states are indicated for the CORESET with the lowest ID within the activated DL BWP of the cell by the MAC CE, controls to transmit the PUCCH using the spatial relation corresponding to the first TCI state among the multiple TCI states, the base station has: a transmitting unit that transmits the MAC CE.

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