Terminal, wireless communication method, base station and system

Abstract

A terminal pertaining to an embodiment of the present disclosure comprises: a control unit for determining, on the basis of a rule, a first control resource set (CORESET) to be preferentially monitored, from a plurality of CORESETs; and a reception unit which, when the monitoring opportunities of the first CORESET having one or more transmission configuration indication (TCI) states and a second CORESET having one or more TCI states overlap, controls monitoring of a downlink control channel (PDCCH) in the second CORESET on the basis of the TCI states of the first and the second CORESETs. According to an embodiment of the present disclosure, collision among a plurality of PDCCHs can be appropriately coped with.

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 technology]

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of achieving higher data rates and lower latency (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of achieving higher capacity and greater sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later, etc.) are also being considered. [Prior art documents] [Non-patent literature]

[0004] [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 [Problem to be solved by the invention]

[0005] The previous Rel.15 / 16 NR specifications specify constraints (also called priority rules) to ensure that multiple channels / signals fall into the same Quasi-Co-Location (QCL) Type D in the case of collision, or to avoid such cases.

[0006] In addition, in NR, one or more transmission / reception points (TRPs) (multi-TRPs (MTRPs)) are considered to perform DL transmission to a user terminal (user terminal, User Equipment (UE)). In addition, it is also considered that a UE performs UL transmission to one or more TRPs.

[0007] In addition, for Rel.17 NR, support for simultaneous reception of multiple QCL type D channels / signals in a UE is being considered. However, there is still no progress in the study of how to control collisions of downlink control channels when a UE can simultaneously receive multiple QCL type D channels / signals. For example, there is no progress in the study of how to control monitoring of the downlink control channel (Physical Downlink Control Channel (PDCCH)) in a CORESET when monitoring opportunities for multiple control resource sets (Control Resource Set (CORESET)) overlap. If this is not considered, there is a risk that UE transmission and reception will be inappropriately restricted, resulting in a decrease in throughput or deterioration of communication quality.

[0008] Therefore, an object of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately handle collisions between multiple downlink control channels. [Means for solving the problem]

[0009] A terminal according to one embodiment of the present disclosure includes: Multiple From the number of Control Resource Sets (CORESETs) , which is used to monitor the Physical Downlink Control Channel (PDCCH) and has two or less activated Transmission Configuration Indication states (TCI states); A control unit that determines a first CORESET; The number of activated TCI states is 2 The first CORESET Monitoring opportunities and, The number of activated TCI states is 2 Second CORESET monitoring opportunity and Duplicate death , the first CORESET Two TCI Status One of the , the second CORESET Two TCI Status If the location is the same as one of the Quasi-Co-Location (QCL) In the second CORESET and monitors the PDCCH. A receiving unit; and the first CORESET is a CORESET corresponding to a CSS set of a minimum index in a cell of a minimum index that includes a Common Search Space (CSS), or a CORESET corresponding to a UE-specific Search Space (USS) set of a minimum index in a cell of a minimum index. . Effect of the Invention

[0010] According to one aspect of the present disclosure, it is possible to appropriately handle collisions between multiple downlink control channels. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing an example in which the TCI state of a prioritized CORESET is different from two TCI states of other CORESETs. [Diagram 2] FIG. 2 is a diagram showing an example in which the TCI state of a prioritized CORESET is the same as one of two TCI states of another CORESET. [Diagram 3] FIG. 3 is a diagram showing an example in which two TCI states of a prioritized CORESET are the same as two TCI states of another CORESET. [Figure 4] FIG. 4 is a diagram showing an example in which two TCI states of a prioritized CORESET are different from two TCI states of other CORESETs. [Diagram 5] FIG. 5 is a diagram showing an example in which one of two TCI states of a prioritized CORESET is the same as one of two TCI states of another CORESET. [Figure 6]FIG. 6 is a diagram showing an example in which both of the two TCI states of a prioritized CORESET are different from one TCI state of another CORESET. [Figure 7] FIG. 7 is a diagram showing an example in which one of two TCI states of a prioritized CORESET is the same as one TCI state of another CORESET. [Figure 8] FIG. 8 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 9] FIG. 9 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 10] FIG. 10 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 11] FIG. 11 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (TCI, spatial relations, QCL) In NR, it is considered to control reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and encoding) in a UE of at least one of a signal and a channel (referred to as a signal / channel) based on a transmission configuration indication state (TCI state).

[0013] The TCI state may represent a state that is applied to a downlink signal / channel. The equivalent of the TCI state that is applied to an uplink signal / channel may be expressed as a spatial relation.

[0014] The TCI state is information on the Quasi-Co-Location (QCL) of signals / channels, and may be called spatial reception parameters, spatial relation information, etc. The TCI state may be configured in the UE for each channel or for each signal.

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

[0016] In addition, the spatial reception parameters may correspond to a reception beam (e.g., a reception analog beam) of the UE, and the beam may be specified based on a spatial QCL. A QCL (or at least one element of a QCL) in the present disclosure may be replaced with a spatial QCL (sQCL).

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

[0018] The UE's assumption that a Control Resource Set (CORESET), channel, or reference signal is in a particular QCL (e.g., QCL type D) relationship with another CORESET, channel, or reference signal may be referred to as a QCL assumption.

[0019] The UE may determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) for a signal / channel based on the TCI condition or QCL assumptions of the signal / channel.

[0020] The TCI state may be, for example, information about the QCL of the channel of interest (in other words, the Reference Signal (RS) for that channel) and another signal (e.g., another RS). The TCI state may be set (indicated) by higher layer signaling, physical layer signaling, or a combination of these.

[0021] In the present disclosure, higher layer signaling may be, for example, any one or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like.

[0022] The MAC signaling may be, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0023] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0024] In addition, the channel / signal to which the TCI state is applied may be called a target channel / reference signal (target channel / RS) or simply a target, and the other signal may be called a reference reference signal (reference RS), source RS, or simply a reference.

[0025] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0026] In addition, the RS that has a QCL relationship with the channel may be at least one of, for example, a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a sounding reference signal (SRS), a tracking CSI-RS (also called a tracking reference signal (TRS)), a QCL detection reference signal (also called a QRS), a demodulation reference signal (DMRS), etc.

[0027] An SSB is a signal block including at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). An SSB may be referred to as an SS / PBCH block.

[0028] An RS of QCL type X in a TCI state may refer to an RS that has a QCL type X relationship with a certain channel / signal (its DMRS), and this RS may be called a QCL source of QCL type X in the TCI state.

[0029] (Multiple channels / signal collisions) In the previous Rel.15 / 16 NR specifications, a UE can only receive, detect or monitor channels / signals of the same QCL type D at the same time, but cannot receive, detect or monitor multiple channels / signals of different QCL types D at the same time. For this reason, the Rel.15 / 16 NR specifications specify the following constraints (which may be called priority rules, QCL application rules, etc.) to ensure that multiple channels / signals fall under the same QCL type D in cases where multiple channels / signals collide (in other words, are transmitted / received at overlapping times) or to avoid such cases.

[0030] In addition, in the present disclosure, collision of multiple channels / signals may mean that multiple channels / signals of different QCL types D are scheduled (or configured) to be received (or transmitted) in the same time resource (period).

[0031] Also, in this disclosure, a difference between (the reference RS of) a QCL type D of a certain channel / signal and (the reference RS of) a QCL type D of another channel / signal may mean that a beam used for communication of the certain channel / signal is different from a beam used for communication of the other channel / signal. In this disclosure, a difference between (the reference RS of) a QCL type D of a certain channel / signal and (the reference RS of) a QCL type D of another channel / signal may be expressed as the QCL types D of the certain channel / signal and the other channel / signal being different, their QCL type D characteristics being different, the "QCL types D" being different, etc.

[0032] <PDCCH vs. PDCCH> When a UE is configured for single-cell operation or carrier aggregation operation in the same frequency band, and monitors PDCCH candidates at overlapping monitoring opportunities in multiple CORESETs having the same or different QCL type D characteristics in the active DL BWP of one or more cells, it monitors PDCCHs only in a certain CORESET among the multiple CORESETs and in a CORESET that has the same QCL type D characteristics as the certain CORESET.

[0033] This "certain CORESET" corresponds to the lowest-indexed Common Search Space (CSS) set in the lowest-indexed cell that contains the CSS set, if any, or the lowest-indexed UE-specific Search Space (USS) set in the lowest-indexed cell, if not. The lowest USS set index is determined across all USS sets that have at least one PDCCH candidate in overlapping PDCCH monitoring occasions.

[0034] Simply put, when monitoring PDCCH candidates at overlapping monitoring opportunities, the UE determines the CORESET to be monitored according to the following priority rules: CSS sets are monitored with priority over USS sets, and among SS sets of the same type (CSS or USS), the one with the smaller index (i.e., the one with the smaller cell index; if the cell index is the same, the one with the smaller SS set index) is monitored with priority.

[0035] The SS set index may correspond to a value set by the RRC parameter SearchSpaceId for identifying a search space. In the present disclosure, the CSS set index may mean the SS set index for an SS set whose search space type (RRC parameter "searchSpaceType") indicates CSS. In the present disclosure, the USS set index may mean the SS set index for an SS set whose search space type (RRC parameter "searchSpaceType") indicates USS.

[0036] (Multi-TRP) In the NR, it is considered that one or more transmission / reception points (TRPs) (multi-TRPs (MTRPs)) perform DL transmission to a UE. It is also considered that a UE performs UL transmission to one or more TRPs.

[0037] In Rel.17 and later, it is assumed that repetition transmission (PDCCH repetition) is applied to PDCCH (or DCI) transmitted from one or more TRPs. For example, it is conceivable to schedule or instruct transmission / reception of one or more signals / channels using multiple PDCCHs (or DCI) transmitted from one or more TRPs.

[0038] The PDCCH / DCI to which the repetitive transmission is applied may be called a multi-PDCCH / multi-DCI. The repetitive transmission of the PDCCH may be interchangeably read as PDCCH repetition, multiple transmission of the PDCCH, multi-PDCCH transmission or multiple PDCCH transmission, MTR PDCCH, and the like.

[0039] The multiple PDCCHs / multiple DCIs may be transmitted from different TRPs, and the multiple PDCCHs / DCIs may be multiplexed using time division multiplexing (TDM) / frequency division multiplexing (FDM) / space division multiplexing (SDM).

[0040] For example, when PDCCH repetition is performed using TDM (TDM PDCCH repetition), PDCCH may be transmitted from multiple TRPs using different time resources.

[0041] In the case of FDM PDCCH repetition, PDCCH may be transmitted from multiple TRPs using different frequency-time resources. In FDM PDCCH repetition, at least one of the following may be associated with different TCI states: two sets of resource element groups (REGs), a control channel element (CCE) of the transmitted PDCCH, two non-overlapping transmitted PDCCH repetitions in frequency, and a non-overlapping multi-chance transmitted PDCCH in frequency.

[0042] When SDM PDCCH repetition is performed, PDCCH may be transmitted from multiple TRPs using the same time / frequency resources. In SDM PDCCH repetition, PDCCH DMRS in all REGs / CCEs of the PDCCH may be associated with two TCI states. In this disclosure, SDM may be interchangeably read as single frequency network (SFN).

[0043] A UE to which FDM / SDM PDCCH repetition is applied should be able to receive multiple beams (multiple QCL type D channels / signals) simultaneously. However, there is no progress in the study on whether or not to follow the above-mentioned constraints (priority rules) when the UE can receive multiple beams (multiple QCL type D channels / signals) simultaneously to control PDCCH collisions. For example, when multiple CORESET monitoring opportunities overlap, there is no progress in the study on how to control PDCCH monitoring in CORESET. If this is not studied, there is a risk that UE transmission and reception will be inappropriately restricted, resulting in a decrease in throughput or deterioration of communication quality.

[0044] Therefore, the present inventors came up with the idea of ​​control that can appropriately deal with collisions between multiple PDCCHs.

[0045] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0046] In the present disclosure, "A / B" may mean "at least one of A and B."

[0047] In the present disclosure, the terms activate, deactivate, indicate, select, configure, update, determine, etc. may be read as interchangeable terms.

[0048] In the present disclosure, RRC, RRC parameters, RRC messages, higher layer parameters, information elements (IEs), and configurations may be interchangeable. In the present disclosure, MAC CE, update commands, and activation / deactivation commands may be interchangeable. In the present disclosure, support, control, controllable, operate, and operable may be interchangeable.

[0049] Additionally, in the present disclosure, the terms sequence, list, set, group, and collection may be interpreted interchangeably.

[0050] In the present disclosure, panel, beam, panel group, beam group, Uplink (UL) transmitting entity, TRP, spatial relationship information (SRI), spatial relationship, control resource set (CORESET), Physical Downlink Shared Channel (PDSCH), codeword, base station, a specific antenna port (e.g., a DeModulation Reference Signal (DMRS) port), a specific antenna port group (e.g., a DMRS port group), a specific group (e.g., a Code Division Multiplexing (CDM) group, a specific reference signal group, a CORESET group), a specific resource (e.g., a specific reference signal resource), a specific resource set (e.g., a specific reference signal resource set), a CORESET pool, a PUCCH group (PUCCH resource group), spatial relationship group, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, active TCI state, etc. may be read as interchangeable.

[0051] The panel may be associated with at least one of a group index of an SSB / CSI-RS group, a group index of a group-based beam report, and a group index of an SSB / CSI-RS group for group-based beam reporting.

[0052] In addition, a panel identifier (ID) and a panel may be interchangeable. That is, a TRP ID and a TRP, a CORESET group ID and a CORESET group, etc. may be interchangeable.

[0053] In this disclosure, the terms index, ID, indicator, and resource ID may be interchangeable. In this disclosure, the terms sequence, list, set, group, cluster, and subset may be interchangeable.

[0054] In this disclosure, a single PDCCH may be assumed to be supported when multiple TRPs use an ideal backhaul, and multiple PDCCHs may be assumed to be supported when multiple TRPs use a non-ideal backhaul.

[0055] In addition, the ideal backhaul may be called DMRS port group type 1, reference signal associated group type 1, antenna port group type 1, CORESET pool type 1, etc. The non-ideal backhaul may be called DMRS port group type 2, reference signal associated group type 2, antenna port group type 2, CORESET pool type 2, etc. The names are not limited to these.

[0056] In the present disclosure, multi-TRP, multi-TRP system, multi-TRP transmission, and multi-PDSCH may be read as interchangeable.

[0057] In the present disclosure, single DCI (sDCI), single PDCCH, multi-TRP system based on single DCI, sDCI-based MTRP, and activating two TCI states on at least one TCI codepoint may be read as interchangeable.

[0058] In the present disclosure, multi-DCI (mDCI), multi-PDCCH, multi-TRP system based on multi-DCI, mDCI-based MTRP, and setting two CORESET pool indices or CORESET pool index=1 (or a value greater than or equal to 1) may be read as interchangeable.

[0059] The QCL of the present disclosure may be interchangeably read as QCL type D.

[0060] Note that the following embodiments are described assuming that they are applied when the UE supports simultaneous reception of two or more different QCL type D channels / signals, but may also be applied in other cases.

[0061] In the present disclosure, expressions such as "TCI state A is of the same QCL type D as TCI state B," "TCI state A corresponds to a reference signal of the same QCL type D as TCI state B," "TCI state A is the same as TCI state B," and "TCI state A is of QCL type D with TCI state B" may be interpreted as interchangeable.

[0062] In this disclosure, overlapping monitoring occasions may mean that the time / frequency resources of the monitoring occasions overlap.

[0063] (Wireless communication method) In the present disclosure, a UE determines a first CORESET (priority CORESET) to be preferentially monitored from multiple CORESETs based on any of the following priority rules. Then, when monitoring opportunities of the first CORESET having one or more TCI states and a second CORESET (another CORESET) having one or more TCI states overlap, the UE controls monitoring of the PDCCH in the second CORESET (determines whether to monitor) based on the TCI states of the first CORESET and the TCI states of the second CORESET. This control will be described in each embodiment.

[0064] <Priority rules> A priority rule in the present disclosure will be described. A UE may determine a prioritized CORESET from multiple CORESETs based on any of the following first to third priority rules. An SFN PDCCH repetition scheme may be applied to the PDCCH transmission in the present disclosure.

[0065] In the present disclosure, two or more TCI states may be activated per CORESET. The activation of the TCI state for the CORESET may be signaled to the UE using the MAC CE.

[0066] In the present disclosure, a CORESET to be monitored that is determined based on a priority rule is also simply referred to as a "prioritized CORESET," a CORESET with the highest priority, etc. The prioritized CORESET may be a CORESET that is monitored with priority.

[0067] [First Priority Rule] The first priority rule is the same as that of Rel.16 NR. In other words, the UE determines the prioritized CORESET according to the priority rule that the CSS set is monitored with priority over the USS set, and among SS sets of the same type (CSS or USS), the one with the smaller index (i.e., the one with the smaller cell index. If the cell indexes are the same, the one with the smaller SS set index) is monitored with priority.

[0068] [Second Priority Rule] The second rule of priority is: Step 1: If there is a subset of the colliding CORESETs that have two active TCI states, apply the priority rules of Rel.16 NR to only those. If a preferred CORESET is found, end the step. Otherwise, go to step 2. · Step 2: If no preferred CORESET is found in step 1, apply the priority rules of Rel.16 NR to only the subset of conflicting CORESETs that have one active TCI state.

[0069] In other words, in the second priority rule, the UE determines the preferred CORESET according to the priority rule that the CORESET to be monitored is determined preferentially in the following order: CSS set with two active TCI states > USS set with two active TCI states > CSS set with one active TCI state > USS set with one active TCI state.

[0070] In addition, among SS sets of the same type (CSS or USS) with the same number of active TCI states, the one with the smaller index (i.e., the one with the smaller cell index; if the cell indices are the same, the one with the smaller SS set index) is selected as the preferred CORESET.

[0071] [Third Priority Rule] The third priority rule is: Step 1: Among the conflicting CORESETs, if there is a CORESET with two active TCI states that corresponds to the CSS set with the smallest index in the cell with the smallest index that contains the CSS set, determine this as the preferred CORESET and end the step. Otherwise, go to step 2. Step 2: If there is a CORESET among the conflicting CORESETs that has one active TCI state and corresponds to the CSS set with the smallest index in the cell with the smallest index that contains the CSS set, determine this as the preferred CORESET and end the step. Otherwise, go to step 3. Step 3: If there is a CORESET among the conflicting CORESETs that has two active TCI states and corresponds to the lowest indexed USS set in the lowest indexed cell that contains the USS set, determine this CORESET as the preferred CORESET and end the step. Otherwise, go to step 4. Step 4: Among the conflicting CORESETs, if there is a CORESET that has one active TCI state and corresponds to the lowest-indexed USS set in the lowest-indexed cell that contains the USS set, determine this CORESET as the preferred CORESET and end the step.

[0072] In other words, in the third priority rule, the UE determines the preferred CORESET according to the priority rule that the CORESET to be monitored is determined preferentially in the following order: CSS set with two active TCI states > CSS set with one active TCI state > USS set with two active TCI states > USS set with one active TCI state.

[0073] In addition, among SS sets of the same type (CSS or USS) with the same number of active TCI states, the one with the smaller index (i.e., the one with the smaller cell index; if the cell indices are the same, the one with the smaller SS set index) is selected as the preferred CORESET.

[0074] <First embodiment> When monitoring opportunities of PDCCHs with different QCL types D overlap, for example, the following two cases are considered for how to control PDCCH collisions. As an example, a process when monitoring opportunities of CORESET#1 and CORESET#2 overlap will be described.

[0075] Case 1-1: CORESET#1 has two TCI states (TCI#1, TCI#2), and CORESET#2 has one TCI state (TCI#1). Case 1-2: CORESET#1 has two TCI states (TCI#1, TCI#2), and CORESET#2 has one TCI state (TCI#3).

[0076] When the first priority rule is applied, only CORESETs that have the same TCI state (QCL type D) as the preferred CORESET may be monitored. Therefore, in case 1, if CORESET#2 is the preferred CORESET, the question arises as to whether CORESET#1 can be monitored. For example, if one of the TCI states of a certain CORESET is the same as the preferred CORESET, a new rule may be applied that monitors the certain CORESET.

[0077] For case 1, several options are possible: (1) If CORESET#1 is the preferred CORESET, CORESET#2 is monitored. (2) If CORESET#2 is the prioritized CORESET, any of the following 2-1 to 2-3 is applied. (2-1) CORESET#1 is not monitored. (2-2) Only TCI#1 of CORESET#1 is monitored. (2-3) Both TCI#1 and TCI#2 of CORESET#1 are monitored.

[0078] In case 2, if CORESET#2 is the preferred CORESET, CORESET#1 may not be monitored. Also, if CORESET#1 is the preferred CORESET, CORESET#2 may not be monitored.

[0079] <Second embodiment> The preferred CORESET in the second embodiment is determined based on any one of the first to third priority rules and is a preferred CORESET having one active TCI state. The following two cases may be applied to PDCCHs (PDCCH candidates) monitored in other CORESETs having two active TCI states whose monitoring opportunities overlap with those of the preferred CORESET.

[0080] [Case 2-1] When one TCI state of a preferred CORESET (CORESET X) is different from two TCI states of another CORESET (CORESET Y), the UE does not need to monitor the PDCCH in the other CORESET (see FIG. 1). In the example of FIG. 1, it is assumed that monitoring opportunities of CORESET X and CORESET Y overlap. In the example of FIG. 1, TCI state #1 of CORESET X is different from TCI states #2 and #3 of CORESET Y, so the UE does not need to monitor the PDCCH in CORESET Y.

[0081] [Case 2-2] If one TCI state of the prioritized CORESET (CORESET X) is the same as any one of two TCI states of another CORESET (CORESET Y'), one of the following options 2-2-1 to 2-2-3 is applied (see Figure 2). In the example of Figure 2, it is assumed that the monitoring opportunities of CORESET X and CORESET Y' overlap.

[0082] [[Option 2-2-1]] The UE may only monitor the PDCCH in another CORESET (CORESET Y') that has the same TCI state as the TCI state of the preferred CORESET (CORESET X). In the example of Figure 2, the UE monitors the PDCCH using (based on) TCI state #1 in CORESET Y' but does not monitor the PDCCH using TCI state #4.

[0083] [[Option 2-2-2]] The UE does not monitor the PDCCH in another CORESET (CORESET Y') regardless of the TCI state. In the example of Fig. 2, the UE does not monitor the PDCCH in CORESET Y' corresponding to both TCI state #1 and TCI state #4.

[0084] [[Option 2-2-3]] The UE monitors the PDCCH in another CORESET (CORESET Y') regardless of the TCI state. In the example of Fig. 2, the UE monitors the PDCCH in CORESET Y' corresponding to both TCI state #1 and TCI state #4.

[0085] Note that any of the above options 2-2-1 to 2-2-3 may be applied when the first TCI state (or second TCI state) of the other CORESET (CORESET Y') is the same as the TCI state of the preferred CORESET (CORESET X). The option (above options 2-2-1 to 2-2-3) applied when the first TCI state of the other CORESET (CORESET Y') is the same as the TCI state of the preferred CORESET (CORESET X) may be different from the option applied when the second TCI state of the other CORESET (CORESET Y') is the same as the TCI state of the preferred CORESET (CORESET X).

[0086] Note that the first TCI state (or the second TCI state) corresponds to TCI state #1 of CORESET Y' in Fig. 2. For example, the first TCI state may be a TCI state having a lower (or higher) ID than the second TCI state.

[0087] According to this embodiment, when monitoring opportunities of a prioritized CORESET having one TCI state and another CORESET having two TCI states overlap, monitoring of the PDCCH can be appropriately controlled.

[0088] <Third embodiment> The preferred CORESET in the third embodiment is determined based on any one of the first to third priority rules and is a preferred CORESET having two active TCI states. The following three cases may be applied to PDCCHs (PDCCH candidates) monitored in other CORESETs having two active TCI states whose monitoring opportunities overlap with those of the preferred CORESET.

[0089] [Case 3-1] The UE may monitor the PDCCH in another CORESET (CORESET Y) if both (two) TCI states of the preferred CORESET (CORESET X) are the same as both (two) TCI states of the other CORESET (CORESET Y) (see FIG. 3). In the example of FIG. 3, it is assumed that the monitoring opportunities of CORESET X and CORESET Y overlap. In the example of FIG. 3, the UE monitors the PDCCH in CORESET Y because the two TCI states of CORESET X and the two TCI states of CORESET Y are both the same (TCI states #1, #4).

[0090] [Case 3-2] If both (two) TCI states of a preferred CORESET (CORESET X) are different from both (two) TCI states of another CORESET (CORESET Y'), the UE does not need to monitor the PDCCH in the other CORESET (CORESET Y') (see FIG. 4). In the example of FIG. 4, it is assumed that monitoring opportunities of CORESET X and CORESET Y' overlap. In the example of FIG. 4, the UE does not monitor the PDCCH in CORESET Y' because the two TCI states of CORESET X (TCI states #1, #4) are different from the two TCI states of CORESET Y' (TCI states #2, #3).

[0091] [Case 3-3] When one of the two TCI states (TCI state #1) of the preferred CORESET (CORESET X) is the same as one of the two TCI states (TCI state #1) of another CORESET (CORESET Y''), either of the following options 3-3-1 or 3-3-2 is applied (see Figure 5). In the example of Figure 5, it is assumed that the monitoring opportunities of CORESET X and CORESET Y'' overlap.

[0092] [[Option 3-3-1]] The UE may only monitor the PDCCH in another CORESET (CORESET Y'') that has the same TCI state as the TCI state of the preferred CORESET (CORESET X). In the example of Figure 5, the UE monitors the PDCCH using (based on) TCI state #1 in CORESET Y'' and does not monitor the PDCCH using TCI state #3.

[0093] [[Option 3-3-2]] The UE may not monitor the PDCCH in another CORESET (CORESET Y'').

[0094] In the following cases (1) to (4), the above option 3-3-1 or 3-3-2 may be applied. For example, the first TCI state may be a TCI state having a lower (or higher) ID than the second TCI state. Either option 3-3-1 or 3-3-2 may be applied in each of the following cases (1) to (4).

[0095] (1) When the first TCI state of another CORESET (CORESET Y'') is the same as the first TCI state of the preferred CORESET (CORESET X). (2) The second TCI state of another CORESET (CORESET Y'') is the same as the second TCI state of the preferred CORESET (CORESET X). (3) The first TCI state of another CORESET (CORESET Y'') is the same as the second TCI state of the preferred CORESET (CORESET X). (4) The second TCI state of another CORESET (CORESET Y'') is the same as the first TCI state of the preferred CORESET (CORESET X).

[0096] According to this embodiment, when monitoring opportunities of a prioritized CORESET having two TCI states and another CORESET having two TCI states overlap, monitoring of the PDCCH can be appropriately controlled.

[0097] <Fourth embodiment> The preferred CORESET in the fourth embodiment is determined based on any one of the first to third priority rules and is a preferred CORESET having two active TCI states. The following two cases may be applied to a PDCCH (PDCCH candidate) monitored in another CORESET having one active TCI state and having an overlapping monitoring opportunity with the preferred CORESET.

[0098] [Case 4-1] If both (two) TCI states of the preferred CORESET (CORESET X) are different from one TCI state of the other CORESET (CORESET Y), the UE may not monitor the PDCCH in the other CORESET (CORESET Y) (see FIG. 6). In the example of FIG. 6, it is assumed that monitoring opportunities of CORESET X and CORESET Y overlap. In the example of FIG. 6, since two TCI states of CORESET X are different from one TCI state of CORESET Y, the UE does not monitor the PDCCH in CORESET Y.

[0099] [Case 4-2] If one of the two TCI states of the preferred CORESET (CORESET X) is the same as one TCI state of another CORESET (CORESET Y), then either of the following options 4-2-1 or 4-2-2 applies (see Figure 7). In the example of Figure 7, it is assumed that the monitoring opportunities of CORESET X and CORESET Y' overlap. In the example of Figure 7, one TCI state of CORESET Y' (TCI state #1) is the same as one of the two TCI states of CORESET X (TCI state #1).

[0100] [[Option 4-2-1]] The UE monitors the PDCCH in CORESET Y'.

[0101] [[Option 4-2-2]] The UE does not monitor the PDCCH in CORESET Y'.

[0102] In addition, in the following cases (1) or (2), the above Option 4-2-1 or 4-2-2 may be applied. For example, the first TCI state may be a TCI state having an ID lower (or higher) than that of the second TCI state. For each of the following cases (1) and (2), it may be different which of the above Option 4-4-1 or 4-4-2 is applied.

[0103] (1) When the TCI state of another CORESET (CORESET Y') is the same as the first TCI state of the prioritized CORESET (CORESET X). (2) When the TCI state of another CORESET (CORESET Y') is the same as the second TCI state of the prioritized CORESET (CORESET X).

[0104] According to this embodiment, when the monitoring opportunities of the prioritized CORESET having two TCI states and another CORESET having one TCI state overlap, the monitoring of the PDCCH can be appropriately controlled.

[0105] <UE Capability> In addition, at least one of the above embodiments may be applied only to a UE that has reported a specific UE capability or supports the specific UE capability.

[0106] The specific UE capability may indicate at least one of the following: · Whether it supports the SFN PDCCH repetition scheme. · Whether it supports the SFN PDCCH repetition scheme for the CSS set. · Whether it supports the SFN PDCCH repetition scheme for the USS set. · Whether it supports the simultaneous reception of PDCCHs of two (or more) different QCL types D.

[0107] Also, at least one of the above-mentioned embodiments may be applied when the UE reports corresponding UE capabilities or when specific information related to the above-mentioned embodiments is configured by higher layer signaling (if not configured, for example, the operation of Rel.15 / 16 is applied). For example, the specific information may be information indicating that a SFN / FDM PDCCH repetition scheme is enabled, any RRC parameter for a specific release (for example, Rel.17), etc.

[0108] (Wireless communication systems) A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination of these methods.

[0109] 8 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0110] Furthermore, the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0111] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN) and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN and the LTE (E-UTRA) base station (eNB) is the SN.

[0112] The wireless communication system 1 may support dual connectivity between multiple base stations in the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0113] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as a base station 10.

[0114] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0115] 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 above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

[0116] Furthermore, the user terminal 20 may perform communication in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0117] The multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0118] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0119] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0120] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

[0121] The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0122] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as a downlink channel.

[0123] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0124] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0125] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information of at least one of the PDSCH and the PUSCH.

[0126] In addition, DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

[0127] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0128] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in the present disclosure may be read as interchangeable terms.

[0129] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0130] In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels.

[0131] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0132] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal.

[0133] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal).

[0134] (base station) 9 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

[0135] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0136] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0137] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0138] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0139] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0140] The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0141] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0142] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0143] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0144] The transceiver 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0145] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna .

[0146] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna .

[0147] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0148] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0149] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, etc.

[0150] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0151] In addition, the transceiver 120 may transmit a downlink control channel (PDCCH) for a first CORESET to be preferentially monitored from a plurality of control resource sets (CORESETs) determined based on a rule. When a monitoring opportunity overlaps between the first CORESET having one or more transmission configuration indication states (TCI states) and a second CORESET having one or more TCI states, the transceiver 120 may transmit a PDCCH for the second CORESET, which is monitored and controlled based on the TCI state of the first CORESET and the TCI state of the second CORESET.

[0152] The control unit 110 may control the transmission process of the transmission / reception unit 120 .

[0153] (User terminal) 10 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0154] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0155] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0156] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission / reception unit 220.

[0157] The transmitting / receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting / receiving unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting / receiving circuit, and the like, which are described based on common understanding in the technical field related to the present disclosure.

[0158] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0159] The transmitting / receiving antenna 230 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

[0160] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0161] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0162] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0163] The transceiver 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit sequence to be transmitted, and output a baseband signal.

[0164] Whether or not to apply the DFT process may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver 220 (transmission processor 2211) may perform the DFT process as the transmission process to transmit the channel using a DFT-s-OFDM waveform, and may not perform the DFT process as the transmission process if transform precoding is enabled for the channel.

[0165] The transceiver unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 230.

[0166] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna 230.

[0167] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0168] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0169] In addition, the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0170] In addition, when monitoring opportunities between the first CORESET having one or more transmission setting instruction states (TCI states) and the second CORESET having one or more TCI states overlap, the transceiver unit 220 may control monitoring of the downlink control channel (PDCCH) in the second CORESET based on the TCI state of the first CORESET and the TCI state of the second CORESET.

[0171] When one TCI state of the first CORESET is the same as one of two TCI states of the second CORESET, the transceiver unit 220 may monitor the PDCCH in the second CORESET using the same TCI state as the TCI state of the first CORESET.

[0172] When one of the two TCI states of the first CORESET is the same as one of the two TCI states of the second CORESET, the transceiver unit 220 may monitor the PDCCH in the second CORESET using the same TCI state as one of the two TCI states of the first CORESET.

[0173] The transceiver unit 220 may monitor the PDCCH in the second CORESET when one of the two TCI states in the first CORESET is the same as one TCI state in the second CORESET.

[0174] The control unit 210 may determine, based on a rule, a first CORESET to be preferentially monitored from among a plurality of control resource sets (CORESETs).

[0175] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0176] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, and the like. In either case, as described above, the method of realization is not particularly limited.

[0177] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 11 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0178] In this disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0179] For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processes may be performed by one processor, or the processes may be performed by two or more processors simultaneously, sequentially, or in other manners. Also, the processor 1001 may be implemented by one or more chips.

[0180] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0181] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0182] Moreover, the processor 1001 reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks may be realized in a similar manner.

[0183] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory (primary storage device), and the like. The memory 1002 can store a program (program code), a software module, and the like that is executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0184] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0185] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0186] 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. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0187] 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 configured using a single bus, or may be configured using different buses between each device.

[0188] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0189] (Modification) In addition, the terms explained in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be read as mutually interchangeable. A signal may also be a message. A reference signal may also be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, etc.

[0190] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0191] Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0192] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology.

[0193] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0194] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A different name may be used for the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be read as interchangeable with each other.

[0195] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0196] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0197] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0198] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0199] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0200] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0201] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0202] In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0203] In addition, one or more RBs may be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0204] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0205] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0206] The BWP may include a UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0207] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell", "carrier", etc. in this disclosure may be replaced with "BWP".

[0208] The above-mentioned structures of radio frames, subframes, slots, minislots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

[0209] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0210] The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0211] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0212] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via a plurality of network nodes.

[0213] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0214] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0215] The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, by using a MAC Control Element (CE).

[0216] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0217] The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or by comparing numerical values ​​(e.g., with a predetermined value).

[0218] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0219] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0220] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0221] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," and the like may be used interchangeably.

[0222] In this disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0223] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0224] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0225] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0226] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may 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.), an unmanned moving body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0227] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, an uplink channel, a downlink channel, etc. may be read as a sidelink channel.

[0228] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0229] In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. It is clear that in a network including one or more network nodes having base stations, various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0230] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be reordered unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0231] Each aspect / embodiment described in the present disclosure may be implemented using any of a wide variety of standards, including Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems using 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other appropriate wireless communication methods, next-generation systems that are based on these, etc. Also, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0232] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0233] Any reference to an element using a designation such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

[0234] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, and the like.

[0235] A "determining" may also be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

[0236] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "deciding" to perform some action.

[0237] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0238] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0239] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

[0240] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0241] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0242] In this disclosure, where articles have been added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0243] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure.

Claims

1. A control unit that determines a first CORESET from a plurality of control resource sets (CORESETs) that has two or less activated Transmission Configuration Indication states (TCI states) for use in monitoring a physical downlink control channel (PDCCH); a receiving unit that monitors the PDCCH in the second CORESET when a monitoring opportunity of the first CORESET in which a number of activated TCI states is two overlaps with a monitoring opportunity of the second CORESET in which a number of activated TCI states is two, and one of the two TCI states of the first CORESET is the same Quasi-Co-Location (QCL) as one of the two TCI states of the second CORESET; The first CORESET is a CORESET corresponding to a CSS set of a minimum index in a cell of a minimum index including a Common Search Space (CSS), or a CORESET corresponding to a UE-specific Search Space (USS) set of a minimum index in a cell of a minimum index. Terminal.

2. The receiving unit monitors the PDCCH in the second CORESET when a monitoring opportunity of the first CORESET in which the number of activated TCI states is 1 overlaps with a monitoring opportunity of the second CORESET in which the number of activated TCI states is 2, and the TCI state of the first CORESET is the same Quasi-Co-Location (QCL) as one of the two TCI states of the second CORESET. The terminal according to claim 1.

3. The receiving unit monitors the PDCCH in the second CORESET when a monitoring opportunity of the first CORESET in which the number of activated TCI states is 1 overlaps with a monitoring opportunity of the second CORESET in which the number of activated TCI states is 2, and one QCL type D of the first CORESET is the same as one of two QCL types D of the second CORESET. The terminal according to claim 1.

4. The receiving unit monitors the PDCCH in the second CORESET when a monitoring opportunity of the first CORESET in which the number of activated TCI states is 2 overlaps with a monitoring opportunity of the second CORESET in which the number of activated TCI states is 1, and one of the two TCI states of the first CORESET is the same QCL as the TCI state of the second CORESET. The terminal according to claim 1.

5. A method for determining a first CORESET from a plurality of Control Resource Sets (CORESETs) for use in monitoring a Physical Downlink Control Channel (PDCCH), the first CORESET having two or less activated Transmission Configuration Indication states (TCI states); monitoring the PDCCH in the second CORESET when a monitoring opportunity of the first CORESET, in which a number of activated TCI states is two, overlaps with a monitoring opportunity of the second CORESET, in which a number of activated TCI states is two, and one of the two TCI states of the first CORESET is the same Quasi-Co-Location (QCL) as one of the two TCI states of the second CORESET; The first CORESET is a CORESET corresponding to a CSS set of a minimum index in a cell of a minimum index including a Common Search Space (CSS), or a CORESET corresponding to a UE-specific Search Space (USS) set of a minimum index in a cell of a minimum index. The wireless communication method of the terminal.

6. a control unit for controlling transmission of a Physical Downlink Control Channel (PDCCH) for a first CORESET determined from a plurality of control resource sets (CORESETs), the first CORESET having two or less activated Transmission Configuration Indication states (TCI states); A transmitter for transmitting the PDCCH for a second CORESET, When a monitoring opportunity of the first CORESET, in which the number of activated TCI states is two, overlaps with a monitoring opportunity of a second CORESET, in which the number of activated TCI states is two, and one of the two TCI states of the first CORESET is the same Quasi-Co-Location (QCL) as one of the two TCI states of the second CORESET, the PDCCH for the second CORESET is monitored in the terminal; The first CORESET is a CORESET corresponding to a CSS set of a minimum index in a cell of a minimum index including a Common Search Space (CSS), or a CORESET corresponding to a UE-specific Search Space (USS) set of a minimum index in a cell of a minimum index. Base station.

7. A system including a terminal and a base station, The base station, A transmitter that transmits a downlink control channel (Physical Downlink Control Channel (PDCCH)), The terminal includes: A control unit for determining a first CORESET from a plurality of control resource sets (CORESETs) having two or less activated transmission configuration indication states (TCI states) for monitoring the PDCCH; a receiving unit that monitors the PDCCH in the second CORESET when a monitoring opportunity of the first CORESET in which a number of activated TCI states is two overlaps with a monitoring opportunity of the second CORESET in which a number of activated TCI states is two, and one of the two TCI states of the first CORESET is the same Quasi-Co-Location (QCL) as one of the two TCI states of the second CORESET; The first CORESET is a CORESET corresponding to a CSS set of a minimum index in a cell of a minimum index including a Common Search Space (CSS), or a CORESET corresponding to a UE-specific Search Space (USS) set of a minimum index in a cell of a minimum index. system.

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