Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure includes a control unit that determines a first control resource set (CORESET) to be preferentially monitored from among a plurality of CORESETs based on a rule, and a reception unit that, in a case where a monitoring opportunity of the first CORESET having one or more transmission configuration indication states (TCI states) and a second CORESET having one or more TCI states repeats, controls monitoring of a downlink control channel (PDCCH) in the second CORESET based on a TCI state of the first CORESET and a TCI state of the second CORESET. According to one embodiment of the present disclosure, it is possible to appropriately deal with collisions of a plurality of downlink control channels.

Description

Technical Field

[0001] This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems. Background Technology

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) was standardized with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was standardized with the aim of further increasing capacity and improving the height of LTE (Third Generation Partnership Project (3GPP) Releases (Rel.) 8, 9).

[0003] The development of successor systems to LTE is also underway (e.g., also known as the 5th generation mobile communication system (5G), 5G+, the 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.).

[0004] Existing technical documents

[0005] Non-patent literature

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

[0007] The problem that the invention aims to solve

[0008] In the Rel.15 / 16NR specifications to date, in the case of multiple channel / signal conflicts, in order to ensure that the multiple channels / signals correspond to the same Quasi-Co-Location (QCL) type D, or to avoid such a situation, constraints (also known as priority rules) are specified.

[0009] Furthermore, in NR, research is underway on one or more Transmission / Reception Points (TRPs) (Multi-TRPs (MTRPs)) performing DL (Low-Level Transmission) to user terminals (User Equipment). Additionally, research is underway on UE (Ultimate Length Transmission) to one or more TRPs.

[0010] Furthermore, research is underway to support simultaneous reception of multiple QCL type D channels / signals in a UE for Rel.17NR. However, research has not progressed on controlling downlink control channel conflicts when a UE can simultaneously receive multiple QCL type D channels / signals. For example, there has been no progress on how to control the monitoring of the downlink control channel (Physical Downlink Control Channel (PDCCH)) in a CORESET when monitoring opportunities for multiple Control Resource Sets (CORESETs) overlap. Without research on this, the UE's transmission and reception are not properly limited, raising concerns about reduced throughput or degraded communication quality.

[0011] Therefore, one of the purposes of this disclosure is to provide a terminal, wireless communication method, and base station that can properly respond to conflicts of multiple downlink control channels.

[0012] Methods for solving problems

[0013] One aspect of this disclosure relates to a terminal comprising: a control unit that, based on rules, determines a first CORESET to be monitored preferentially from a plurality of Control Resource Sets (CORESETs); and a receiving unit that, in cases where the monitoring opportunities of the first CORESET having more than one Transmission Configuration Indication state (TCI state) and a second CORESET having more than one TCI state overlap, controls the monitoring of the downlink control channel (Physical 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.

[0014] The effects of the invention

[0015] According to one method of this disclosure, it is possible to properly address conflicts in multiple downlink control channels. Attached Figure Description

[0016] Figure 1 This is a diagram illustrating an example where the TCI state of a priority CORESET differs from the two TCI states of other CORESETs.

[0017] Figure 2 This is a diagram representing an example where the TCI state of the preferred CORESET is the same as either of the two TCI states of the other CORESET.

[0018] Figure 3 This is a diagram representing an example where the two TCI states of a priority CORESET are the same as the two TCI states of another CORESET.

[0019] Figure 4 This is a diagram representing an example where the two TCI states of the preferred CORESET are different from either of the two TCI states of the other CORESET.

[0020] Figure 5 This is a diagram representing an example where one of the two TCI states of a priority CORESET is the same as one of the two TCI states of another CORESET.

[0021] Figure 6 This is a diagram representing an example where two TCI states of a priority CORESET differ from one TCI state of another CORESET.

[0022] Figure 7This is a diagram representing an example where one of the two TCI states of a priority CORESET is the same as one of the TCI states of another CORESET.

[0023] Figure 8 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment.

[0024] Figure 9 This is a diagram illustrating an example of the structure of a base station according to one embodiment.

[0025] Figure 10 This is a diagram illustrating an example of the structure of a user terminal according to one embodiment.

[0026] Figure 11 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment. Detailed Implementation

[0027] (TCI, Spatial Relations, QCL)

[0028] In NR, research is being conducted on receiving processes (e.g., at least one of receiving, demapping, demodulation, and decoding) and transmitting processes (e.g., at least one of transmitting, mapping, precoding, modulation, and encoding) in a UE that control at least one of the signals and channels (referred to as signals / channels) based on the Transmission Configuration Indication state (TCI state).

[0029] TCI states can also represent the states of signals / channels applied to the downlink. States equivalent to the TCI states of signals / channels applied to the uplink can also be described as spatial relations.

[0030] TCI status is information related to the quasi-co-location (QCL) of signals / channels, and can also be referred to as spatial reception parameters, spatial relation information, etc. TCI status can also be set to the UE on a per-channel or per-signal basis.

[0031] QCL is an indicator of the statistical properties of a signal / channel. For example, it can also mean that, given a QCL relationship between a signal / channel and other signals / channels, it can be assumed that at least one of the following is the same (QCL): Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rxparameter) among these different signals / channels.

[0032] Additionally, the spatial reception parameters may also correspond to the UE's receive beam (e.g., receive analog beam), and the beam may also be determined based on the spatial QCL. The QCL (or at least one element of the QCL) in this disclosure may also be replaced with sQCL (spatial QCL).

[0033] Regarding QCL, multiple types (QCL types) can also be specified. For example, four QCL types AD can be set, in which the parameters (or parameter sets) that can be assumed to be the same are different. These parameters (also referred to as QCL parameters) are represented as follows:

[0034] • QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread.

[0035] • QCL Type B (QCL-B): Doppler shift and Doppler extension.

[0036] • QCL Type C (QCL-C): Doppler shift and average delay,

[0037] • QCL type D (QCL-D): Space reception parameters.

[0038] The UE envisions a situation where a certain Control Resource Set (CORESET), channel, or reference signal is in a specific QCL (e.g., QCL type D) relationship with other CORESETs, channels, or reference signals. This can also be referred to as a QCL assumption.

[0039] The UE may also determine at least one of the transmit beam (Tx beam) and receive beam (Rx beam) of the signal / channel based on the TCI state or QCL assumption of the signal / channel.

[0040] The TCI state can also be, for example, information relating to the QCL of the target channel (in other words, the reference signal (RS) used by the channel) and other signals (e.g., other RSs). The TCI state can also be set (indicated) by higher-layer signaling, physical-layer signaling, or a combination thereof.

[0041] In this disclosure, higher-level signaling may be, for example, any one or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc.

[0042] MAC signaling can also use MAC Control Element (MAC CE) or MAC Protocol Data Unit (PDU). Broadcast information can also be Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), or Other System Information (OSI).

[0043] Physical layer signaling can also be, for example, downlink control information (Downlink Control Information (DCI)).

[0044] In addition, the channel / signal that becomes the application object in the TCI state can also be called the target channel / reference signal (RS), or simply the target, etc. The other signals mentioned above can also be called reference RS, source RS, etc.

[0045] The channel whose TCI state or spatial relationship is set (specified) can be, for example, at least one of the following: downlink shared channel (Physical Downlink Shared Channel (PDSCH))), downlink control channel (Physical Downlink Control Channel (PDCCH))), uplink shared channel (Physical Uplink Shared Channel (PUSCH))), and uplink control channel (Physical Uplink Control Channel (PUCCH))).

[0046] Furthermore, the RS that is related to the channel as QCL can be at least one of the following: a Synchronization Signal Block (SSB), a Channel State Information Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), a Tracking CSI-RS (also known as a Tracking Reference Signal (TRS)), a QCL Detection Reference Signal (also known as a QRS), or a DeModulation Reference Signal (DMRS).

[0047] An SSB is a block of signals that contains at least one Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and Physical Broadcast Channel (PBCH). An SSB can also be referred to as an SS / PBCH block.

[0048] The RS of QCL type X in TCI state can also refer to the RS that is in a QCL type X relationship with a certain channel / signal (DMRS), and this RS can also be called the QCL source of QCL type X in TCI state.

[0049] (Collision of multiple channels / signals)

[0050] In the Rel.15 / 16NR specifications to date, 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. Therefore, the Rel.15 / 16NR specifications stipulate constraints (also known as priority rules, QCL application rules, etc.) as described below to ensure that multiple channels / signals correspond to the same QCL type D in cases of conflicting channels / signals (in other words, being transmitted / received at overlapping times), or to avoid such cases.

[0051] Additionally, in this disclosure, multiple channel / signal conflicts can also refer to multiple channels / signals of different QCL types D that are scheduled (or set) to receive (or transmit) in the same time resource (period).

[0052] Furthermore, in this disclosure, the difference between the QCL type D (reference RS) of a certain channel / signal and the QCL type D (reference RS) of other channels / signals can also refer to a difference between the beam used in the communication of that certain channel / signal and the beam used in the communication of those other channels / signals. In this disclosure, the difference between the QCL type D (reference RS) of a certain channel / signal and the QCL type D (reference RS) of other channels / signals can also be expressed as a difference in the QCL type D of that certain channel / signal, a difference in their QCL type D characteristics, or simply a difference in the "QCL type D".

[0053] <PDCCH vs. PDCCH>

[0054] When a UE is configured to operate in a single cell or to operate in carrier aggregation in the same frequency band, and in multiple CORESETs with the same or different QCL type D characteristics in the active DL BWPs of more than one cell, when monitoring PDCCH candidates in repeated monitoring opportunities, only the PDCCH in one of the multiple CORESETs and the CORESET with the same QCL type D characteristics as that CORESET are monitored.

[0055] Regarding the "certain CORESET", if it exists, it corresponds to the CSS set with the smallest index in the cell containing the smallest index of the Common Search Space (CSS) set; otherwise, it corresponds to the UE-specific Search Space (USS) set with the smallest index in the cell containing the smallest index. The smallest USS set index is determined by covering all USS sets with at least one PDCCH candidate in repeated PDCCH monitoring opportunities.

[0056] In short, when monitoring PDCCH candidates in repeated monitoring opportunities, the UE follows the following priority rule to determine the CORESET of the monitored object: the CSS set is monitored before the USS set. Furthermore, among SS sets of the same kind (type) (CSS or USS), the one with the smaller index (in other words, the one with the smaller cell index. If the cell indexes are the same, further, the one with the smaller SS set index is monitored) is monitored first.

[0057] Additionally, the SS set index may also correspond to a value set by the RRC parameter SearchSpaceId used to identify the search space. Furthermore, in this disclosure, the CSS set index may also refer to the SS set index for the CSS set indicated by the search space type (RRC parameter "searchSpaceType"). Moreover, in this disclosure, the USS set index may also refer to the SS set index for the SS set indicated by the search space type (RRC parameter "searchSpaceType").

[0058] (Multiple TRPs)

[0059] However, in NR, research is underway on DL transmission to the UE via one or more Transmission / Reception Points (TRPs) (Multi-TRPs (MTRPs)). Additionally, research is underway on UL transmission to the UE via one or more TRPs.

[0060] Following Rel.17, it is also envisioned that repeated transmissions (PDCCH repetition) be applied to PDCCHs (or DCIs) transmitted from more than one TRP. For example, consider using multiple PDCCHs (or DCIs) transmitted from more than one TRP to schedule or transmit / receive instructions for more than one signal / channel.

[0061] The PDCCH / DCI that is repeatedly sent by the application can also be called multiple PDCCH / multiple DCI. The repeated transmission of PDCCH can also be interchanged with PDCCH repetition, multiple PDCCH transmission, multi-PDCCH transmission, or MTPDCCH, etc.

[0062] Multiple PDCCHs / DCIs can also be transmitted from different TRPs. These multiple PDCCHs / DCIs can also be multiplexed using time division multiplexing (TDM), frequency division multiplexing (FDM), or space division multiplexing (SDM).

[0063] For example, in the case of using TDM for PDCCH repetition (TDM PDCCH repetition), PDCCH can also be sent from multiple TRPs using different time resources.

[0064] In the case of FDM PDCCH repetition, PDCCHs can also be transmitted from multiple TRPs using different frequency and time resources. In FDM PDCCH repetition, two sets of Resource Element Groups (REGs), the Control Channel Element (CCE) of the transmitted PDCCH, two frequency-non-repeating PDCCH repetitions, and at least one frequency-non-repeating multi-chance transmitted PDCCHs can also be associated with different TCI states.

[0065] In the case of SDM PDCCH repetition, PDCCHs can also be transmitted from multiple TRPs using the same time / frequency resources. During SDM PDCCH repetition, the PDCCH DMRS in the full REG / CCE of the PDCCH can also be associated with two TCI states. Furthermore, in this disclosure, SDM can also be interchanged with a single frequency network (SFN).

[0066] A UE repeatedly using FDM / SDM PDCCH should be able to simultaneously receive multiple beams (multiple QCL type D channels / signals). However, whether the control of PDCCH conflicts in cases where a UE can simultaneously receive multiple beams (multiple QCL type D channels / signals) follows the aforementioned constraints (priority rules) has not been studied. For example, there has been no progress in researching how to control PDCCH monitoring in a CORESET when monitoring opportunities overlap across multiple CORESETs. Without this research, UE transmission and reception are inappropriately restricted, raising concerns about reduced throughput or degraded communication quality.

[0067] Therefore, the inventors of this invention conceived of a way to properly handle the conflict of multiple PDCCHs.

[0068] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods involved in each embodiment can be used individually or in combination.

[0069] Additionally, in this disclosure, "A / B" may also refer to "at least one of A and B".

[0070] In this disclosure, the terms "activate", "deactivate", "indicate", "select", "configure", "update", and "determine" can be used interchangeably.

[0071] In this disclosure, RRC, RRC parameters, RRC messages, high-level parameters, information elements (IE), and settings can be substituted for each other. In this disclosure, MAC CE, update command, and activation / deactivation command can also be substituted for each other. In this disclosure, support, control, ability to control, operation, and ability to operate can also be substituted for each other.

[0072] Furthermore, in this disclosure, sequences, lists, sets, groups, clusters, etc., can be used interchangeably.

[0073] In this disclosure, the following terms may be interchanged: panel, beam, panel group, beam group, uplink (UL) transmission entity, TRP, spatial relationship information (SRI), spatial relationship, control resource set (CORESET), physical downlink shared channel (PDSCH), codeword, base station, specific antenna port (e.g., DeModulation Reference Signal (DMRS)) port), specific antenna port group (e.g., DMRS port group), specific group (e.g., Code Division Multiplexing (CDM) group, specific reference signal group, CORESET group), specific resource (e.g., specific reference signal resource), specific resource set (e.g., specific reference signal resource set), CORESET pool, PUCCH group (PUCCH resource group), spatial relationship group, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, activated TCI state, etc.

[0074] The panel can also be associated with at least one of the group indexes of the SSB / CSI-RS group, the group indexes of group-based beam reporting, and the group indexes of the SSB / CSI-RS group for group-based beam reporting.

[0075] Furthermore, the panel identifier (Identifier(ID)) and panel can be interchanged. In other words, TRP ID and TRP, CORESET group ID and CORESET group, etc., can also be interchanged.

[0076] In this disclosure, indexes, IDs, indicators, and resource IDs can be used interchangeably. Sequences, lists, sets, groups, clusters, subsets, etc., can also be used interchangeably.

[0077] In this disclosure, it can also be envisioned that a single PDCCH is supported in the case of multiple TRPs utilizing an ideal backhaul. It can also be envisioned that multiple PDCCHs are supported in the case of multiple TRPs utilizing a non-ideal backhaul.

[0078] Additionally, ideal backhaul can also be referred to as DMRS port group type 1, reference signal association group type 1, antenna port group type 1, CORESET pool type 1, etc. Non-ideal backhaul can also be referred to as DMRS port group type 2, reference signal association group type 2, antenna port group type 2, CORESET pool type 2, etc. The names are not limited to these.

[0079] In this disclosure, multiple TRP, multiple TRP system, multiple TRP transmission, and multiple PDSCH can also be interchanged.

[0080] In this disclosure, a single DCI (sDCI), a single PDCCH, a multi-TRP system based on a single DCI, an MTRP based on sDCI, and two TCI states activated at at least one TCI code point can also be interchanged.

[0081] In this disclosure, multiple DCI (mDCI), multiple PDCCH, multiple TRP systems based on multiple DCI, MTRP based on mDCI, and systems with two CORESET pool indices or CORESET pool index = 1 (or more) can also be interchanged.

[0082] The QCL disclosed herein can also be interchanged with QCL type D.

[0083] Furthermore, the following implementation is envisioned to be applied and described in the case where the UE supports simultaneous reception of two or more different QCL type D channels / signals, but it can also be applied in other cases.

[0084] In this disclosure, phrases such as "TCI state A is the same QCL type D as TCI state B", "TCI state A and the reference signal of the same QCL type D as TCI state B correspond", "TCI state A is the same as TCI state B", and "TCI state A and TCI state B become QCL type D" can also be interchanged.

[0085] In this disclosure, surveillance opportunity duplication can also refer to the duplication of surveillance opportunity time / frequency resources.

[0086] (Wireless communication method)

[0087] In this disclosure, the UE determines the first CORESET (preferred CORESET) to be monitored from multiple CORESETs based on any of the following priority rules. Furthermore, if the monitoring opportunities for a first CORESET with more than one TCI state overlap with those for a second CORESET (other CORESET) with more than one TCI state, the UE controls the monitoring (determines whether to monitor) of the PDCCH in the second CORESET based on the TCI states of the first and second CORESETs. This control will be described in various embodiments.

[0088] <Priority Rules>

[0089] The priority rules in this disclosure are explained. The UE may also determine the priority CORESET from multiple CORESETs based on any one of the following first to third priority rules. The SFNPDCCH repetition scheme may also be applied in the PDCCH transmission of this disclosure.

[0090] In this disclosure, each CORESET may also have two or more TCI states activated. The activation of a CORESET's TCI state may also be notified to the UE via MAC CE.

[0091] In this disclosure, the CORESET of the monitored object determined according to the priority rule will also be referred to as "prioritized CORESET", "highest priority CORESET", etc. The priority CORESET can also be the CORESET that is monitored first.

[0092] [First Priority Rule]

[0093] The first priority rule is the same as Rel.16NR. In other words, the UE follows a priority rule to determine the priority CORESET: the CSS set is monitored before the USS set. Furthermore, among SS sets of the same type (CSS or USS), the one with the smaller index (in other words, the one with the smaller cell index) is monitored first. If the cell indexes are the same, then further, the one with the smaller SS set index is monitored first.

[0094] [Second Priority Rule]

[0095] The second priority rule is as follows:

[0096] • Step 1: If a subset of conflicting CORESETs exists with two active TCI states, apply the priority rule of Rel.16NR only to them. If a priority CORESET is found, end the step. Otherwise, proceed to Step 2.

[0097] • Step 2: If the preferred CORESET was not found in step 1, then apply the priority rule of Rel.16NR only to a subset of the conflicting CORESETs that have an active TCI state.

[0098] In other words, in the second priority rule, the UE follows a priority rule to determine the priority CORESET, which is: the CORESET of the monitored object is determined 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.

[0099] Furthermore, among SS sets of the same type (CSS or USS) with the same number of active TCI states, the one with the smaller index (in other words, the one with the smaller cell index. In the case of the same cell index, further, the one with the smaller SS set index) is selected as the preferred CORESET.

[0100] [Third Priority Rule]

[0101] The third priority rule is as follows:

[0102] • Step 1: If, among the conflicting CORESETs, there exists a CORESET with two active TCI states that corresponds to the CORESET with the smallest index in the cell containing the smallest index of the CSS set, then that CORESET is determined as the preferred CORESET, and the process ends. Otherwise, proceed to Step 2.

[0103] • Step 2: If, among the conflicting CORESETs, there exists a CORESET with an active TCI state that corresponds to the CORESET with the smallest index in the cell containing the smallest index of the CSS set, then this CORESET is determined as the preferred CORESET, and the process ends. Otherwise, proceed to Step 3.

[0104] Step 3: If, among the conflicting CORESETs, there exists a CORESET with two active TCI states that corresponds to the CORESET with the smallest USS set in the cell containing the smallest USS set, then this CORESET is determined as the preferred CORESET, and the process ends. Otherwise, proceed to Step 4.

[0105] • Step 4: If, among the conflicting CORESETs, there exists a CORESET with an active TCI state that corresponds to the CORESET with the smallest index in the cell containing the smallest index of the USS set, then this CORESET is determined as the preferred CORESET, and the process ends.

[0106] In other words, in the third priority rule, the UE follows a priority rule to determine the priority CORESET, which is: the CORESET of the monitored object is determined 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.

[0107] Furthermore, among SS sets of the same type (CSS or USS) with the same number of active TCI states, the one with the smaller index (in other words, the one with the smaller cell index. In the case of the same cell index, further, the one with the smaller SS set index) is selected as the preferred CORESET.

[0108] <First Implementation>

[0109] When monitoring opportunities for different PDCCHs of QCL type D overlap, consider the following two scenarios to manage PDCCH conflicts. As an example, the handling of overlapping monitoring opportunities for CORESET#1 and CORESET#2 will be explained.

[0110] Case 1-1: CORESET#1 has two TCI states (TCI#1, TCI#2), and CORESET#2 has one TCI state (TCI#1).

[0111] Case 1-2: CORESET#1 has two TCI states (TCI#1, TCI#2), and CORESET#2 has one TCI state (TCI#3).

[0112] When the first priority rule described above is applied, there is a possibility that only the CORESET with the same TCI state (QCL type D) as the priority CORESET may be monitored. Therefore, in Case 1, if CORESET#2 is the priority CORESET, it becomes questionable whether CORESET#1 can be monitored. For example, if one of the TCI states of a certain CORESET is the same as that of the priority CORESET, a new rule such as monitoring that particular CORESET could also be applied.

[0113] For scenario 1, consider the following options.

[0114] (1) When CORESET#1 is the priority CORESET, CORESET#2 is monitored.

[0115] (2) When CORESET#2 is the preferred CORESET, any one of the following 2-1 to 2-3 shall be applied.

[0116] (2-1) CORESET#1 is not monitored.

[0117] (2-2) Only TCI#1 of CORESET#1 is monitored.

[0118] (2-3) TCI#1 and TCI#2 of CORESET#1 are monitored.

[0119] In scenario 2, if CORESET#2 is the preferred CORESET, CORESET#1 may not be monitored. Furthermore, if CORESET#1 is the preferred CORESET, CORESET#2 may not be monitored.

[0120] <Second Implementation>

[0121] In the second embodiment, the priority CORESET is determined based on any one of the first to third priority rules, becoming a priority CORESET with one active TCI state. Furthermore, the following two scenarios may also apply to the PDCCH (PDCCH candidate) being monitored in other CORESETs that have monitoring opportunities that overlap with this priority CORESET and have two active TCI states.

[0122] [Scenario 2-1]

[0123] If one TCI state of a priority CORESET (CORESET X) differs from both TCI states of another CORESET (CORESET Y), the UE may also choose not to monitor the PDCCH in that other CORESET (see reference). Figure 1 ). Figure 1 In the example, the monitoring opportunities for CORESET X and CORESET Y overlap. Figure 1 In the example, the TCI state #1 of CORESET X is different from the TCI states #2 and #3 of CORESET Y. Therefore, the UE can also not monitor the PDCCH in CORESET Y.

[0124] [Scenario 2-2]

[0125] If one TCI state of the preferred CORESET (CORESET X) is the same as any one of the two TCI states of the other CORESET (CORESET Y'), then any one of the following options 2-2-1 to 2-2-3 is applied (see reference). Figure 2 ). Figure 2 In the example, the monitoring opportunities for CORESET X and CORESET Y' overlap.

[0126] [[Option 2-2-1]]

[0127] The UE can also monitor the PDCCH only in other CORESETs (CORESET Y') that have the same TCI state as the preferred CORESET (CORESET X). Figure 2 In the example, the UE uses (based on) TCI state #1 to monitor the PDCCH in CORESET Y', but does not use TCI state #4 to monitor the PDCCH.

[0128] [[Option 2-2-2]]

[0129] In other CORESETs (CORESET Y'), the UE does not monitor the PDCCH regardless of the TCI state. Figure 2 In the example, the UE does not monitor the PDCCH in CORESET Y' corresponding to both TCI state #1 and TCI state #4.

[0130] [[Options 2-2-3]]

[0131] The UE monitors the PDCCH regardless of the TCI state in other CORESETs (CORESET Y'). Figure 2In the example, the UE monitors the PDCCH in CORESET Y', which corresponds to both TCI state #1 and TCI state #4.

[0132] Additionally, if the first TCI state (or second TCI state) of another CORESET (CORESET Y') is the same as the TCI state of the preferred CORESET (CORESET X), any one of the options 2-2-1 to 2-2-3 above may be applied. The options (options 2-2-1 to 2-2-3 above) applied in cases where the first TCI state of CORESET (CORESET Y') is the same as the TCI state of the preferred CORESET (CORESET X) and the second TCI state of another CORESET (CORESET Y') is the same as the TCI state of the preferred CORESET (CORESET X) may also be different.

[0133] Additionally, the first TCI state (or the second TCI state) is equivalent to Figure 2 The TCI state #1 of CORESET Y' in the data. For example, the first TCI state can also be a TCI state with an ID that is lower (or higher) than the second TCI state.

[0134] According to this embodiment, when the monitoring opportunities of a preferred CORESET with one TCI state overlap with those of other CORESETs with two TCI states, the monitoring of PDCCH can be properly controlled.

[0135] <Third Implementation Method>

[0136] In the third embodiment, the priority CORESET is determined based on any one of the first to third priority rules, becoming a priority CORESET with two active TCI states. Furthermore, the following three cases may be applied to the PDCCH (PDCCH candidate) that is monitored in other CORESETs with two active TCI states, where the priority CORESET overlaps with the monitoring opportunity.

[0137] [Scenario 3-1]

[0138] If the two TCI states of the preferred CORESET (CORESET X) are the same as the two TCI states of the other CORESET (CORESET Y), the UE can also monitor the PDCCH (refer to) in the other CORESET (CORESET Y). Figure 3 ).exist Figure 3 In the example, the monitoring opportunities for CORESET X and CORESET Y overlap. Figure 3 In the example, for the UE, the two TCI states of CORESET X are the same as the two TCI states of CORESET Y (TCI states #1 and #4). Therefore, the UE monitors the PDCCH in CORESET Y.

[0139] [Scenario 3-2]

[0140] If the two TCI states of the preferred CORESET (CORESET X) are different from either of the two TCI states of the other CORESET (CORESETY'), the UE may also not monitor the PDCCH in the other CORESET (CORESETY'). Figure 4 ).exist Figure 4 In the example, the monitoring opportunities for CORESET X and CORESET Y' overlap. Figure 4 In the example, since neither of the two TCI states (TCI states #1 and #4) of CORESET X is different from either of the two TCI states (TCI states #2 and #3) of CORESET Y', the UE does not monitor the PDCCH in CORESET Y'.

[0141] [Scenario 3-3]

[0142] If 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 the other CORESET (CORESET Y”), then either of the following options 3-3-1 or 3-3-2 is applied (see reference). Figure 5 ). Figure 5 In the example, the monitoring opportunities for "CORESET X" and "CORESET Y" overlap.

[0143] [[Option 3-3-1]]

[0144] The UE can also monitor the PDCCH only in other CORESETs (CORESET Y”) that have the same TCI state as the priority CORESET (CORESET X). Figure 5 In the example, the UE uses (based on) TCI state #1 to monitor the PDCCH in "CORESET Y", but does not use TCI state #3 to monitor the PDCCH.

[0145] [[Option 3-3-2]]

[0146] The UE can also be in other CORESET (CORESET Y”) without monitoring the PDCCH.

[0147] Additionally, in the cases (1) to (4) below, options 3-3-1 or 3-3-2 may also be applied. For example, the first TCI state may also be a TCI state with an ID that is lower (or higher) than the second TCI state. Alternatively, for each of the cases (1) to (4) below, the application of option 3-3-1 or 3-3-2 may differ.

[0148] (1) The first TCI state of other CORESET (CORESET Y”) is the same as the first TCI state of priority CORESET (CORESET X).

[0149] (2) The second TCI state of other CORESET (CORESET Y”) is the same as the second TCI state of the preferred CORESET (CORESET X).

[0150] (3) The first TCI state of other CORESET (CORESET Y”) is the same as the second TCI state of the preferred CORESET (CORESET X).

[0151] (4) The second TCI state of other CORESET (CORESET Y”) is the same as the first TCI state of the preferred CORESET (CORESET X).

[0152] According to this embodiment, when the monitoring opportunities of a preferred CORESET with two TCI states overlap with those of other CORESETs with two TCI states, the monitoring of PDCCH can be properly controlled.

[0153] <Fourth Implementation>

[0154] In the fourth embodiment, the priority CORESET is determined based on any one of the first to third priority rules, becoming a priority CORESET with two active TCI states. Furthermore, the following two scenarios may be applied to PDCCHs (PDCCH candidates) that overlap with the monitoring opportunities of this priority CORESET and are monitored in other CORESETs with one active TCI state.

[0155] [Scenario 4-1]

[0156] If the two TCI states of the preferred CORESET (CORESET X) differ from one TCI state of another CORESET (CORESET Y), the UE may also not monitor the PDCCH in the other CORESET (CORESET Y). Figure 6 ).exist Figure 6 In the example, the monitoring opportunities for CORESET X and CORESET Y overlap. Figure 6 In the example, the two TCI states of CORESET X are different from one TCI state of CORESET Y. Therefore, the UE does not monitor the PDCCH in CORESET Y.

[0157] [Scenario 4-2]

[0158] If one of the two TCI states of the preferred CORESET (CORESET X) is the same as one of the TCI states of the other CORESET (CORESET Y), then either option 4-2-1 or 4-2-2 is applied (see reference). Figure 7 ). Figure 7 In the example, the monitoring opportunities for CORESET X and CORESET Y' overlap. Figure 7 In the example, one of the TCI states (TCI state #1) of CORESET Y' is the same as one of the two TCI states (TCI state #1) of CORESET X.

[0159] [[Option 4-2-1]]

[0160] The UE monitors the PDCCH in CORESET Y'.

[0161] [[Option 4-2-2]]

[0162] The UE does not monitor the PDCCH in CORESET Y'.

[0163] Additionally, in cases (1) or (2) below, options 4-2-1 or 4-2-2 may also be applied. For example, the first TCI state may also be a TCI state with an ID lower (or higher) than the second TCI state. Alternatively, the application of option 4-4-1 or 4-4-2 may differ for each of cases (1) and (2) below.

[0164] (1) The case where the TCI state of other CORESET (CORESET Y') is the same as the first TCI state of the priority CORESET (CORESET X).

[0165] (2) The case where the TCI state of other CORESET (CORESET Y') is the same as the second TCI state of the priority CORESET (CORESET X).

[0166] According to this embodiment, when the monitoring opportunities of a preferred CORESET with two TCI states overlap with those of other CORESETs with one TCI state, the monitoring of PDCCH can be properly controlled.

[0167] <UE Capability>

[0168] In addition, at least one of the above-described embodiments may be applied only to UEs that have reported a specific UE capability or support that specific UE capability.

[0169] This specific UE capability can also represent at least one of the following:

[0170] • Does it support the SFN PDCCH repetition scheme?

[0171] • Does it support the SFN PDCCH repetition scheme for CSS sets?

[0172] • Does it support the SFN PDCCH repetition scheme for the USS set?

[0173] • Whether it supports simultaneous reception of PDCCH of two (or more) different QCL types D.

[0174] Alternatively, at least one of the above-described implementations may be applied when the UE reports the corresponding UE capability or when specific information associated with the above-described implementation is set via higher-layer signaling (if not set, for example, applying Rel.15 / 16 operations). For example, this specific information may be information indicating activation of the SFN / FDM PDCCH recurrence scheme, arbitrary RRC parameters for a specific version (e.g., Rel.17), etc.

[0175] (Wireless Communication System)

[0176] The structure of a wireless communication system according to one embodiment of this disclosure will be described below. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of this disclosure.

[0177] Figure 8This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment. The wireless communication system 1 may also be a system that uses Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) as standardized by the Third Generation Partnership Project (3GPP).

[0178] Furthermore, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0179] 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.

[0180] Wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (e.g., MN and SN are dual connectivity of NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0181] The wireless communication system 1 may also include: a base station 11 forming a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a-12c) configured within the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. User terminals 20 may also be located within at least one cell. The configuration and number of each cell and user terminal 20 are not limited to the arrangement shown in the figure. Hereinafter, without distinguishing between base stations 11 and 12, they will be collectively referred to as base station 10.

[0182] User terminal 20 may also connect to at least one of multiple base stations 10. User terminal 20 may also utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0183] Each CC can also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). Macro cell C1 can also be included in FR1, and small cell C2 can also be included in FR2. For example, FR1 can also be a frequency band below 6 GHz (sub-6 GHz), and FR2 can also be a frequency band above 24 GHz (above-24 GHz). In addition, the frequency bands, definitions, etc. of FR1 and FR2 are not limited to these; for example, FR1 can also correspond to a frequency band higher than FR2.

[0184] In addition, user terminal 20 can also communicate in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0185] Multiple base stations 10 can also be connected via wired (e.g., fiber optic cable based on the Common Public Radio Interface (CPRI), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, base station 11, which is equivalent to a host station, can also be referred to as an Integrated Access Backhaul (IAB) donor, and base station 12, which is equivalent to a relay station, can also be referred to as an IAB node.

[0186] Base station 10 may also be connected to core network 30 via other base stations 10 or directly. Core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0187] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0188] In wireless communication system 1, wireless access methods based on Orthogonal Frequency Division Multiplexing (OFDM) can also be used. For example, in at least one of the downlink (DL) and uplink (UL) links, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA) can also be used.

[0189] Wireless access methods can also be referred to as waveforms. In addition, in wireless communication system 1, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be applied in the wireless access methods of UL and DL.

[0190] In the wireless communication system 1, the downlink channel can also be a shared downlink channel (Physical Downlink Shared Channel (PDSCH)), a broadcast channel (Physical Broadcast Channel (PBCH)), or a downlink control channel (Physical Downlink Control Channel (PDCCH)) shared by each user terminal 20.

[0191] In addition, in the wireless communication system 1, the uplink channel can also be an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), an uplink control channel (Physical Uplink Control Channel (PUCCH)), or a random access channel (Physical Random Access Channel (PRACH)) shared by each user terminal 20.

[0192] User data, high-level control information, and System Information Blocks (SIBs) are transmitted via PDSCH. User data and high-level control information can also be transmitted via PUSCH. Furthermore, Master Information Blocks (MIBs) can be transmitted via PBCH.

[0193] Lower-layer control information can also be transmitted via PDCCH. This lower-layer control information may include, for example, downlink control information (DCI), which includes scheduling information for at least one of PDSCH and PUSCH.

[0194] Additionally, the DCI for scheduling PDSCH can also be called DL allocation, DL DCI, etc., and the DCI for scheduling PUSCH can also be called UL authorization, UL DCI, etc. Furthermore, PDSCH can also be replaced with DL data, and PUSCH can also be replaced with UL data.

[0195] In PDCCH detection, a Control Resource Set (CORESET) and a search space can be utilized. A CORESET corresponds to the resources used to search for DCIs. The search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor CORESETs associated with a specific search space based on search space settings.

[0196] A search space can also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces can also be referred to as a search space set. In addition, the terms "search space", "search space set", "search space setting", "search space set setting", "CORESET", and "CORESET setting" used in this disclosure can be used interchangeably.

[0197] Uplink control information (UCI) can also be transmitted via PUCCH, including at least one of the following: Channel State Information (CSI), delivery confirmation information (e.g., also known as Hybrid Automatic Repeat reQuest ACK knowledgement (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR). Random access preambles used for establishing a connection with the cell can also be transmitted via PRACH.

[0198] Additionally, in this disclosure, downlink, uplink, etc., may be described without the word "link". Furthermore, it may be described without "physical" at the beginning of various channels.

[0199] In wireless communication system 1, synchronization signals (SS) and downlink reference signals (DL-RS) can also be transmitted. In wireless communication system 1, as DL-RS, cell-specific reference signals (CRS), channel state information reference signals (CSI-RS), demodulation reference signals (DMRS), positioning reference signals (PRS), and phase tracking reference signals (PTRS) can also be transmitted.

[0200] Synchronization signals can be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be called an SS / PBCH block, SS block (SSB), etc. Furthermore, SS, SSB, etc., can also be called reference signals.

[0201] Furthermore, in the wireless communication system 1, the uplink reference signal (UL-RS) can also transmit measurement reference signals (sounding reference signals (SRS)) and demodulation reference signals (DMRS). Additionally, the DMRS can also be referred to as a user terminal-specific reference signal (UE-specific reference signal).

[0202] (Base station)

[0203] Figure 9 This diagram illustrates an example of the structure of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmit / receive unit 120, a transmit / receive antenna 130, and a transmission path interface (transmission line interface) 140. Alternatively, the control unit 110, the transmit / receive unit 120, the transmit / receive antenna 130, and the transmission path interface 140 may each be provided in more than one manner.

[0204] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the base station 10 may also possess other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0205] The control unit 110 performs overall control of the base station 10. The control unit 110 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the art to which this disclosure pertains.

[0206] The control unit 110 can also control signal generation and scheduling (e.g., resource allocation, mapping). The control unit 110 can also control transmission, reception, and measurement using the transmit / receive unit 120, transmit / receive antenna 130, and transmission path interface 140. The control unit 110 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmit / receive unit 120. The control unit 110 can also perform call processing (setting, releasing, etc.) of the communication channel, status management of the base station 10, and management of wireless resources.

[0207] The transmitting / receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting / receiving unit 120 can be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0208] The transmitting and receiving unit 120 can be configured as a single integrated transmitting and receiving unit, or it can be configured as a transmitting unit and a receiving unit. The transmitting unit can also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit can also be configured as a receiving processing unit 1212, an RF unit 122, and a measurement unit 123.

[0209] The transmitting and receiving antenna 130 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0210] The transmitting / receiving unit 120 can also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 can also receive the aforementioned uplink channel, uplink reference signal, etc.

[0211] The transmitting and receiving unit 120 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0212] The transmitting and receiving unit 120 (transmitting processing unit 1211) may, for example, perform processing at the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer (e.g., RLC retransmission control), and Medium Access Control (MAC) layer (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 110, and generate a bit string to be transmitted.

[0213] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform transmission processing such as channel coding (which may also include error correction coding), modulation, mapping, filter processing, Discrete Fourier Transform (DFT) processing (as needed), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output the baseband signal.

[0214] The transmitting and receiving unit 120 (RF unit 122) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 130.

[0215] On the other hand, the transmitting and receiving unit 120 (RF unit 122) can also amplify, filter, and demodulate the baseband signal for the wireless frequency band signal received by the transmitting and receiving antenna 130.

[0216] The transmitting and receiving unit 120 (receiving and processing unit 1212) can also perform receiving and processing on the acquired baseband signal, including analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data.

[0217] The transmitting / receiving unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc., based on the received signal. The measurement unit 123 can also measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 110.

[0218] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between the device included in the core network 30 and other base stations 10, and can also acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0219] In addition, the transmitting unit and receiving unit of the base station 10 in this disclosure may also be composed of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0220] Additionally, the transmit / receive unit 120 may also transmit the downlink control channel (PDCCH) for a first CORESET that is preferentially monitored from multiple control resource sets (CORESETs) based on rules. The transmit / receive unit 120 may also transmit the PDCCH for the second CORESET, based on the TCI states of the first CORESET and the second CORESET, when monitoring opportunities for the first CORESET having more than one Transmission Setting Indication State (TCI state) and the second CORESET having more than one TCI state overlap.

[0221] The control unit 110 can also control the transmission processing of the transmitting and receiving unit 120.

[0222] (User terminal)

[0223] Figure 10 This diagram illustrates an example of the structure of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Alternatively, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided as one or more.

[0224] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the user terminal 20 may also possess other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0225] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the art to which this disclosure pertains.

[0226] The control unit 210 can also control signal generation, mapping, etc. The control unit 210 can also control transmission, reception, measurement, etc., using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmission / reception unit 220.

[0227] The transmitting / receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting / receiving unit 220 may be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0228] The transmitting and receiving unit 220 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit can also be composed of a receiving processing unit 2212, an RF unit 222, and a measurement unit 223.

[0229] The transmitting and receiving antenna 230 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0230] The transmitting / receiving unit 220 can also receive the downlink channel, synchronization signal, downlink reference signal, etc., mentioned above. The transmitting / receiving unit 220 can also transmit the uplink channel, uplink reference signal, etc., mentioned above.

[0231] The transmitting and receiving unit 220 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0232] The transmitting and receiving unit 220 (transmitting processing unit 2211) may, for example, perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 210, and generate the bit string to be transmitted.

[0233] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output the baseband signal.

[0234] Furthermore, the application of DFT processing can be based on the transform precoding settings. For a specific channel (e.g., PUSCH), if transform precoding is active (enabled), the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above for transmitting the channel using the DFT-s-OFDM waveform. Otherwise, the transmit / receive unit 220 (transmit processing unit 2211) can perform the aforementioned transmit processing without performing DFT processing.

[0235] The transmitting and receiving unit 220 (RF unit 222) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 230.

[0236] On the other hand, the transmitting and receiving unit 220 (RF unit 222) can also amplify, filter, and demodulate the baseband signal for the wireless frequency band signal received by the transmitting and receiving antenna 230.

[0237] The transmitting and receiving unit 220 (receiving and processing unit 2212) can also perform receiving and processing on the acquired baseband signal, such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data.

[0238] The transmitting / receiving unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can also perform RRM measurements, CSI measurements, etc., based on the received signal. The measurement unit 223 can also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 210.

[0239] In addition, the transmitting unit and receiving unit of the user terminal 20 in this disclosure can also be configured by at least one transmitting / receiving unit 220 and transmitting / receiving antenna 230.

[0240] In addition, the transmitting and receiving unit 220 may also control the 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 when the monitoring opportunities of the first CORESET having more than one transmission setting indication state (TCI state) and the second CORESET having more than one TCI state are repeated.

[0241] The transmitting and receiving unit 220 can also monitor the PDCCH using the same TCI state in the second CORESET as the TCI state in the first CORESET, if one of the TCI states of the first CORESET and one of the two TCI states of the second CORESET are the same.

[0242] The transmitting and receiving unit 220 may also monitor the PDCCH by using the same TCI state in the second CORESET as one of the two TCI states in the first CORESET, if one of the two TCI states in the first CORESET is the same as one of the two TCI states in the second CORESET.

[0243] The transmitting and receiving unit 220 may also monitor the PDCCH in the second CORESET if one of the two TCI states of the first CORESET is the same as one of the TCI states of the second CORESET.

[0244] The control unit 210 can also determine the first CORESET to be monitored based on rules from multiple control resource sets (CORESETs).

[0245] (Hardware Structure)

[0246] Furthermore, the block diagrams used in the description of the above embodiments illustrate functional units. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Moreover, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using a single device that is physically or logically combined, or it can be implemented by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. A functional block can also be implemented by combining one or more of the aforementioned devices with software.

[0247] Here, the functions include judgment, decision, determination, calculation, calculation, processing, export, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, choosing, establishing, comparison, assumption, expectation, regard as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, a functional block (structural unit) that implements the sending function can also be called a transmitting unit, transmitter, etc. As described above, the implementation method is not particularly limited.

[0248] For example, in one embodiment of this disclosure, the base station, user terminal, etc., can also function as a computer for processing the wireless communication method of this disclosure. Figure 11 This diagram illustrates an example of the hardware structure of a base station and a user terminal according to one embodiment. The base station 10 and the user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0249] Furthermore, in this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware structure of base station 10 and user terminal 20 can be configured to include one or more of the apparatuses shown in the figures, or it can be configured not to include any of the apparatuses.

[0250] For example, only one processor 1001 is shown, but there can be multiple processors. Furthermore, processing can be performed by one processor, or simultaneously, sequentially, or by two or more processors using other methods. Additionally, processor 1001 can be implemented using more than one chip.

[0251] The functions of the base station 10 and the user terminal 20 are implemented, for example, by reading specific software (programs) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 can perform calculations and control communication via the communication device 1004, or control at least one of reading out and writing data in the memory 1002 and the storage device 1003.

[0252] The processor 1001, for example, enables the operating system to operate and control the computer as a whole. The processor 1001 may also be configured as a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, at least a portion of the control unit 110 (210), the transmit / receive unit 120 (220), etc., described above may also be implemented by the processor 1001.

[0253] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes accordingly. As a program, a program that causes the computer to perform at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operating in the processor 1001; similar implementations can be made for other functional blocks.

[0254] The memory 1002 may also be a computer-readable recording medium, such as being composed of at least one of read-only memory (ROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), random access memory (RAM), or other suitable storage media. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 is capable of storing executable programs (program code), software modules, etc., for implementing the wireless communication method according to one embodiment of the present disclosure.

[0255] Storage device 1003 may also be a computer-readable recording medium, such as at least one of a flexible disc, floppy disk, optical disk (e.g., compact disc ROM, CD-ROM), digital multifunction disk, Blu-ray disc, removable disk, hard disk, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium. Storage device 1003 may also be referred to as an auxiliary storage device.

[0256] The communication device 1004 is hardware (transmitting and receiving device) used for communication between computers via at least one of a wired network and a wireless network. It is also referred to as a network device, network controller, network interface card (NIC), communication module, etc. To implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the aforementioned transmitting and receiving unit 120 (220) and transmitting and receiving antenna 130 (230) may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be implemented by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0257] Input device 1005 is an input device that receives input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, light-emitting diode (LED) lamp, etc.). Alternatively, input device 1005 and output device 1006 can also be an integrated structure (e.g., touch panel).

[0258] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communication of information. The bus 1007 can be a single bus or different buses can be used between the devices.

[0259] Furthermore, the base station 10 and the user terminal 20 can also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field-programmable gate array (FPGA), and this hardware can be used to implement some or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0260] (Modified Example)

[0261] Furthermore, the terms described in this disclosure, as well as those necessary for understanding this disclosure, may be replaced with terms that have the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be used interchangeably. Additionally, a signal may also be a message. A reference signal may also be abbreviated as RS, and may be referred to as pilot, pilot signal, etc., depending on the applied standard. Furthermore, a component carrier (CC) may also be referred to as cell, frequency carrier, carrier frequency, etc.

[0262] A radio frame can also be composed of one or more periods (frames) in the time domain. Each period (frame) that constitutes the radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set (numerology).

[0263] Here, the parameter set can also refer to communication parameters applied in at least one of the transmission and reception of a signal or channel. For example, the parameter set can also represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0264] In the time domain, a time slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.). Furthermore, a time slot can also be a time unit based on a set of parameters.

[0265] A time slot can also contain multiple mini-time slots. Each mini-time slot can also consist of one or more symbols in the time domain. Furthermore, a mini-time slot can also be called a sub-time slot. A mini-time slot can also consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-time slot can also be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-time slots can also be called PDSCH (PUSCH) mapping type B.

[0266] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols can also use their respective other names. Furthermore, the time units such as frames, subframes, time slots, mini-time slots, and symbols used in this disclosure can be used interchangeably.

[0267] For example, a subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, a time slot or a mini-time slot can also be called a TTI. That is to say, at least one of a subframe and a TTI can be a subframe in the existing LTE (1ms), a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing TTI may not be called a subframe, but a time slot, mini-time slot, etc.

[0268] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules radio resources (frequency bandwidth, transmit power, etc., available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0269] TTI can also be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., and can also be a unit of processing such as scheduling and link adaptation. In addition, when a TTI is given, the actual time interval (e.g., the number of symbols) mapped to the transmission block, code block, codeword, etc. can be shorter than the TTI.

[0270] Furthermore, when a time slot or a mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can also serve as the minimum time unit for scheduling. In addition, the number of time slots (mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0271] A Time Interval (TTI) with a duration of 1 ms can also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI can also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub-time slot, a time slot, etc.

[0272] In addition, long TTIs (e.g., normal TTIs, subframes, etc.) can be replaced with TTIs with a duration of more than 1 ms, and short TTIs (e.g., shortened TTIs, etc.) can be replaced with TTIs with a duration of less than long TTIs but more than 1 ms.

[0273] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can contain one or more consecutive subcarriers. The number of subcarriers in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers in an RB can also be determined based on the parameter set.

[0274] Furthermore, an RB can contain one or more symbols in the time domain, and can also be a time slot, a mini-time slot, a subframe, or the length of a TTI. A TTI, a subframe, etc., can also be composed of one or more resource blocks.

[0275] In addition, one or more RBs can also be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0276] Furthermore, a resource block can also consist of one or more resource elements (REs). For example, an RE can also be a radio resource area consisting of a subcarrier and a symbol.

[0277] The Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RBs) used for a certain parameter set in a carrier. Here, common RBs can also be determined by indexing RBs based on a common reference point of the carrier. PRBs can also be defined in a BWP and appended with numbers within that BWP.

[0278] A BWP can also include a UL BWP (BWP used by UL) and a DL BWP (BWP used by DL). For a UE, one or more BWPs can also be set within a single carrier.

[0279] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Furthermore, terms such as "cell" and "carrier" in this disclosure can be replaced with "BWP".

[0280] Furthermore, the structures described above, such as radio frames, subframes, time slots, mini-time slots, and symbols, are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0281] Furthermore, the information, parameters, etc., described in this disclosure can be represented by absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by a specific index.

[0282] In this disclosure, the names used for parameters, etc., are not limiting names in any respect. Furthermore, the mathematical expressions, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name; therefore, the various names assigned to these various channels and information elements are not limiting names in any respect.

[0283] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be mentioned throughout the above description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0284] Furthermore, information, signals, etc., can be output in at least one of the following directions: from higher level (upper layer) to lower level (lower layer), and from lower layer to higher level. Information, signals, etc., can also be input and output via multiple network nodes.

[0285] Input and output information and signals can be stored in a specific location (such as memory) or managed using management tables. Input and output information and signals can be overwritten, updated, or appended. Output information and signals can also be deleted. Input information and signals can also be sent to other devices.

[0286] The notification of information is not limited to the methods / implementations described in this disclosure, and may also be carried out by other methods. For example, the notification of information in this disclosure may also be implemented through physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI), etc.), higher layer signaling (e.g., radio resource control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB) etc.), medium access control (MAC) signaling), other signals, or combinations thereof.

[0287] In addition, physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. Furthermore, RRC signaling can also be referred to as RRC messages, such as RRC connection setup messages, RRC connection reconfiguration messages, etc. Additionally, MAC signaling can also be notified using, for example, the MAC control element (CE).

[0288] Furthermore, notification of specific information (e.g., a notification that “is X”) is not limited to explicit notification, but can also be implicit (e.g., by not providing that specific information, or by providing other information).

[0289] The determination can be made by a value represented by a single bit (0 or 1), by a true or false value (boolean), or by a numerical comparison (e.g., a comparison with a specific value).

[0290] Whether it is called software, firmware, middleware, microcode, hardware description language, or any other name, software should be broadly interpreted as instructions, instruction sets, code, code segments, program code, program, subprogram, software module, application, software application, software package, routine, subroutine, object, executable file, execution thread, process, function, etc.

[0291] Furthermore, software, instructions, and information can also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0292] The terms “system” and “network” as used in this disclosure are used interchangeably. “Network” may also refer to devices included in a network (e.g., a base station).

[0293] In this disclosure, the terms "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", "beamwidth", "beam angle", "antenna", "antenna element", and "panel" are used interchangeably.

[0294] In this disclosure, the terms "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access Point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "Panel", "Cell", "Sector", "Cell Group", "Carrier", and "Component Carrier" are used interchangeably. There are also instances where the terms macro cell, small cell, femtocell, and picocell are used to refer to a base station.

[0295] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, its coverage area can be divided into several smaller areas, each of which can provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​at least one of the base station and base station subsystem providing communication services within that coverage area.

[0296] In this disclosure, the terms “Mobile Station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” are used interchangeably.

[0297] There are also instances where mobile stations are referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or several other appropriate terms.

[0298] At least one of the base station and the mobile station can also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Additionally, at least one of the base station and the mobile station can also be a device mounted on a mobile body, the mobile body itself, etc. This mobile body can be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body moving in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). Furthermore, at least one of the base station and the mobile station also includes devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station can also be an Internet of Things (IoT) device such as a sensor.

[0299] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, various methods / implementations of this disclosure can be applied to a structure where the communication between the base station and the user terminal is replaced by communication between multiple user terminals (e.g., it can also be referred to as device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, it can also be configured such that the user terminal 20 has the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be replaced with terms corresponding to inter-terminal communication (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can also be replaced with sidelink channel.

[0300] Similarly, the user terminal in this disclosure can also be replaced by a base station. In this case, it can also be configured such that the base station 10 has the functions of the user terminal 20 described above.

[0301] In this disclosure, operations are assumed to be performed by the base station, and sometimes, depending on the circumstances, by its upper node. Clearly, in a network comprising one or more network nodes having a base station, various operations for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (e.g., considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or combinations thereof.

[0302] The various methods / implementations described in this disclosure can be used individually, in combination, or switched as needed during execution. Furthermore, the processing procedures, sequences, flowcharts, etc., of the various methods / implementations described in this disclosure can be rearranged as long as they do not contradict each other. For example, with respect to the methods described in this disclosure, the illustrated order is used to indicate various steps, but the order in which they are indicated is not limited.

[0303] The various methods / implementations described in this disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future generation radio access (FX), Global System for Mobile Communications (GSM), CDMA2000, Ultra Mobile Broadband (UMB), and IEEE This includes IEEE 802.11 (Wi-Fi, registered trademark), IEEE 802.16 (WiMAX, registered trademark), IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (registered trademark), systems utilizing other suitable wireless communication methods, and next-generation systems derived from them. Furthermore, multiple systems can be combined (e.g., LTE or LTE-A, combinations with 5G, etc.) for application.

[0304] As used in this disclosure, the word "based on" does not mean "based on only" unless otherwise specified. In other words, the word "based on" means both "based on only" and "based on at least".

[0305] Any reference to an element using the terms "first," "second," etc., as used in this disclosure does not comprehensively limit the quantity or order of these elements. These terms may be used in this disclosure as a convenient way to distinguish between two or more elements. Therefore, references to the first and second elements do not imply that only two elements are permitted, or that the first element must take precedence over the second element in some form.

[0306] The term "determining" as used in this disclosure can encompass a wide variety of operations. For example, "determining" can also refer to judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), and ascertaining.

[0307] In addition, "judgment (decision)" can also refer to receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, accessing (e.g., accessing data in memory), etc., as situations where "judgment (decision)" is performed.

[0308] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, or comparing are considered as making a "judgment (decision)". In other words, "judgment (decision)" can also refer to certain actions as situations where a "judgment (decision)" is made.

[0309] In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0310] As used in this disclosure, the terms "connected," "coupled," or all variations thereof, mean any direct or indirect connection or combination between two or more elements, and can include cases where there is one or more intermediate elements between two mutually "connected" or "coupled" elements. The combination or connection between elements can be physical, logical, or a combination thereof. For example, "connected" can also be replaced with "access."

[0311] In this disclosure, when connecting two elements, it is possible to consider using more than one wire, cable, printed electrical connection, etc., and as several non-limiting and non-inclusive examples, using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, to "connect" or "combine" them with each other.

[0312] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other". Additionally, the term can also mean "A and B are each different from C". Terms such as "separate" and "combined" can also be interpreted in the same way as "different".

[0313] In this disclosure, the terms “include,” “including,” and variations thereof, as used, mean inclusiveness, similar to the term “comprising.” Furthermore, the term “or” as used in this disclosure does not mean XOR.

[0314] In this disclosure, for example, in cases where articles are added through translation, such as a, an, and the in English, the disclosure may also include cases where the noun following these articles is in a plural form.

[0315] The inventions disclosed herein have been described in detail above. However, it will be apparent to those skilled in the art that the inventions are not limited to the embodiments described herein. The inventions disclosed herein can be implemented as modifications and variations without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description in this disclosure is for illustrative purposes only and is not intended to limit the inventions disclosed herein.

Claims

1. A terminal, characterized in that, have: The control unit selects from multiple control resource sets (CORESET) the first CORESET that has two or fewer active transmission configuration indication states (TCI states) for monitoring the downlink control channel (PDCCH, Physical Downlink Control Channel). The receiving unit monitors the PDCCH in the second CORESET when the monitoring opportunities of the first CORESET with two activated TCI states overlap and the monitoring opportunities of the second CORESET with two activated TCI states overlap, and one of the two TCI states of the first CORESET is the same as one of the two TCI states of the second CORESET, namely, the quasi-co-location (QCL). The first CORESET is either the CORESET of the minimum index of the CSS set in the cell containing the minimum index of the Common Search Space, or the CORESET of the UE-specific Search Space set (USS) of the minimum index in the cell containing the minimum index.

2. The terminal as described in claim 1, wherein, If the monitoring opportunity of the first CORESET with 1 activated TCI state overlaps with the monitoring opportunity of the second CORESET with 2 activated TCI states, and the TCI state of the first CORESET is the same as one of the two TCI states of the second CORESET (Quasi-Co-Location), the receiving unit monitors the PDCCH in the second CORESET.

3. The terminal as described in claim 1, wherein, If the monitoring opportunity of the first CORESET with 1 activated TCI state overlaps with the monitoring opportunity of the second CORESET with 2 activated TCI states, and one QCL type D of the first CORESET is the same as one of the two QCL types D of the second CORESET, the receiving unit monitors the PDCCH in the second CORESET.

4. The terminal as described in claim 1, wherein, If the monitoring opportunity of the first CORESET with 2 activated TCI states overlaps with the monitoring opportunity of the second CORESET with 1 activated TCI state, and one of the two TCI states of the first CORESET is the same QCL as the TCI state of the second CORESET, the receiving unit monitors the PDCCH in the second CORESET.

5. A wireless communication method, which is a wireless communication method for a terminal, comprising: The steps of determining, from multiple control resource sets (CORESETs), a first CORESET having no more than two active Transmission Configuration Indication (TCI) states for monitoring the downlink control channel (PDCCH, Physical Downlink Control Channel); and... The monitoring opportunity of the first CORESET with 2 activated TCI states overlaps with the monitoring opportunity of the second CORESET with 2 activated TCI states, 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, in the second CORESET, the step of monitoring the PDCCH. The first CORESET is either the CORESET of the minimum index of the CSS set in the cell containing the minimum index of the Common Search Space, or the CORESET of the UE-specific Search Space set (USS) of the minimum index in the cell containing the minimum index.

6. A base station, comprising: The control unit controls the transmission of the downlink control channel (PDCCH, Physical Downlink Control Channel) for the first CORESET, which is determined from multiple control resource sets (CORESETs) and has no more than two active transmission configuration indication states (TCI states); and The transmitting unit transmits the PDCCH for the second CORESET. In the case where the monitoring opportunities for the first CORESET with two activated TCI states overlap with those for the second CORESET with two activated TCI states, 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, then in the terminal, the PDCCH of the second CORESET is monitored. The first CORESET is either the CORESET of the minimum index of the CSS set in the cell containing the minimum index of the Common Search Space, or the CORESET of the UE-specific Search Space set (USS) of the minimum index in the cell containing the minimum index.

7. A system comprising a terminal and a base station, The base station has: The transmitting unit transmits the downlink control channel, i.e., the PDCCH (Physical Downlink Control Channel). The terminal has: The control unit determines, from multiple control resource sets (CORESET), the first CORESET that has two or fewer active transmission configuration indication states (TCI states) for monitoring the PDCCH. The receiving unit, in the case where the monitoring opportunities of the first CORESET (with two activated TCI states) and the second CORESET (with two activated TCI states) overlap, 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, monitors the PDCCH in the second CORESET. The first CORESET is either the CORESET of the minimum index of the CSS set in the cell containing the minimum index of the Common Search Space, or the CORESET of the UE-specific Search Space set (USS) of the minimum index in the cell containing the minimum index.

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