Terminal, wireless communication method and base station

Abstract

One method of the terminal disclosed in the present invention comprises: a receiving unit, which receives a physical shared channel scheduled through multiple downlink control channels allocated to different time domains; and a control unit, which determines at least one of a quasi-co-location (QCL) and a transmission setting indicator (TCI) state corresponding to the physical shared channel based on a time offset between a specific downlink control channel among the multiple downlink control channels and the physical shared channel, and a certain threshold.

Description

Technical Field

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

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

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

[0004] Prior art literature

[0005] Non-patent literature

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

[0007] Problems to be solved by the invention

[0008] In future wireless communication systems (e.g., NR), one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi-TRP) using one or more panels (multi-panels) are being studied to perform DL transmission (e.g., PDSCH transmission) to a terminal (user terminal, user equipment (UE)).

[0009] In addition, in NR, it is envisioned that repetitive transmission is applied to a specific channel (e.g., PDCCH). For example, consider controlling the scheduling of DL transmission / UL transmission from multiple panels / TRPs using multiple PDCCHs to which repetitive transmission is applied.

[0010] However, in the NR specifications to date, there has been insufficient research on how to control repeated transmissions from more than one TRP.

[0011] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can properly communicate even when repeated transmission is applied in a DL channel sent from more than one TRP.

[0012] Means for solving problems

[0013] A terminal involved in one embodiment of the present invention is characterized in that it comprises: a receiving unit for receiving a physical shared channel scheduled through a plurality of downlink control channels allocated to different time domains; and a control unit for judging at least one of a quasi co-location (QCL) and a transmission setting indicator (TCI) state corresponding to the physical shared channel based on a time offset between a specific downlink control channel among the plurality of downlink control channels and the physical shared channel, and a certain threshold.

[0014] Effects of the Invention

[0015] According to one method of the present disclosure, communication can be properly performed even when repeated transmission is applied to a DL channel sent from more than one TRP. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A-Figure 1D is a diagram showing an example of a multi-TRP scenario.

[0017] Figure 2 This is a diagram showing an example of a case where the PDSCH is repeatedly scheduled by the PDCCH.

[0018] Figure 3A as well as Figure 3B This is a diagram showing an example of PDCCH repetition transmission control in the first example.

[0019] Figure 4 This is a diagram showing an example of PDCCH repetition transmission control in the second example.

[0020] Figure 5 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0021] Figure 6 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0022] Figure 7 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0023] Figure 8 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION

[0024] (TCI, spatial relationship, QCL)

[0025] In NR, research is being conducted to control the reception processing (for example, at least one of reception, demapping, demodulation, and decoding) and transmission processing (for example, at least one of transmission, mapping, precoding, modulation, and coding) of at least one of a signal and a channel (hereinafter referred to as signal / channel) in the UE based on the transmission configuration indication state (Transmission Configuration Indication state (TCI state)).

[0026] The TCI state may also represent the state of a signal / channel applied to a downlink. A state equivalent to the TCI state of a signal / channel applied to an uplink may also be expressed as a spatial relation.

[0027] The TCI state is information related to the Quasi-Co-Location (QCL) of the signal / channel, and can also be called spatial reception parameters, spatial relationship information, etc. The TCI state can also be set for each channel or each signal to the UE. The TCI state, QCL, and QCL assumption can also be interchangeable.

[0028] In addition, in the present disclosure, the TCI state of DL can also be replaced with the spatial relationship of UL, the TCI state of UL, etc.

[0029] QCL is an indicator of the statistical properties of a signal / channel. For example, it may also mean that when a certain signal / channel is in a QCL relationship with other signals / channels, it can be assumed that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter) is the same among these different signals / channels (at least one of them is QCL).

[0030] In addition, the spatial reception parameter may also correspond to the reception beam of the UE (eg, reception analog beam), and the beam may also be determined based on the spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure may also be replaced by sQCL (spatial QCL).

[0031] Regarding QCL, multiple types (QCL types) may also be specified. For example, four QCL types AD may be set, and the parameters (or parameter sets) that can be assumed to be the same in the four QCL types AD are different. The parameters (also referred to as QCL parameters) are expressed as follows:

[0032] QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread,

[0033] QCL type B (QCL-B): Doppler shift and Doppler spread,

[0034] QCL Type C (QCL-C): Doppler shift and average delay,

[0035] QCL type D (QCL-D): spatial reception parameters.

[0036] The situation in which the UE assumes that a specific control resource set (CORESET), channel or reference signal is in a specific QCL (e.g., QCL type D) relationship with other CORESETs, channels or reference signals can also be called QCL assumption.

[0037] The UE may also determine at least one of the transmit beam (Tx beam) and receive beam (Rx beam) of the signal / channel based on the TCI status or QCL assumption of the signal / channel.

[0038] The TCI state may be, for example, information related to the QCL between the channel being the object (in other words, the reference signal (RS) used for the channel) and other signals (for example, other RS). The TCI state may also be set (indicated) by high-layer signaling, physical layer signaling, or a combination thereof.

[0039] In the present disclosure, the high-layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0040] MAC signaling may also use, for example, MAC Control Element (MAC CE), MAC Protocol Data Unit (MAC Protocol Data Unit (PDU)), etc. Broadcast information may also be, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

[0041] The physical layer signaling may be, for example, downlink control information (DCI).

[0042] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0043] In addition, the RS that is in a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (SynchronizationSignal Block (SSB)), a channel state information reference signal (CSI-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called QRS).

[0044] The SSB is a signal block including at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)), a secondary synchronization signal (Secondary Synchronization Signal (SSS)), and a broadcast channel (Physical Broadcast Channel (PBCH)). The SSB may also be referred to as an SS / PBCH block.

[0045] The information element of the TCI state set by high-level signaling ("TCI-state IE" of RRC) may also include one or more QCL information ("QCL-Info"). The QCL information may also include at least one of information related to the RS that forms a QCL relationship (RS relationship information) and information indicating the QCL type (QCL type information). The RS relationship information may also include information such as the index of the RS (for example, SSB index, non-zero-power CSI-RS (Non-Zero-Power (NZP) CSI-RS) resource ID (identifier)), the index of the cell where the RS is located, and the index of the bandwidth part (Bandwidth Part (BWP)) where the RS is located.

[0046] In Rel.15NR, as a TCI state of at least one of PDCCH and PDSCH, both RS of QCL type A and RS of QCL type D or only RS of QCL type A can be set to the UE.

[0047] When TRS is set as RS of QCL type A, it is assumed that TRS is different from the demodulation reference signal (DeModulation Reference Signal (DMRS)) of PDCCH or PDSCH, and the same TRS is periodically transmitted for a long time. UE can measure TRS and calculate average delay, delay spread, etc.

[0048] A UE in which the TRS is set as a QCL type A RS in the TCI state of the DMRS of the PDCCH or PDSCH can assume that the DMRS of the PDCCH or PDSCH is the same as the parameters of the QCL type A of the TRS (average delay, delay spread, etc.), and thus can obtain the parameters of the type A of the DMRS of the PDCCH or PDSCH (average delay, delay spread, etc.) based on the measurement result of the TRS. When the UE performs channel estimation of at least one of the PDCCH and the PDSCH, the measurement result of the TRS can be used to perform a more accurate channel estimation.

[0049] A UE to which a QCL type D RS is set can determine a UE reception beam (spatial domain reception filter, UE spatial domain reception filter) using the QCL type D RS.

[0050] The RS of QCL type X in the TCI state may also mean an RS that is in a QCL type X relationship with a certain channel / signal (DMRS), and the RS may also be referred to as a QCL source of QCL type X in the TCI state.

[0051] (TCI status of PDCCH)

[0052] The information related to the QCL between the PDCCH (or the DMRS antenna port associated with the PDCCH) and a certain RS may also be referred to as the TCI state for the PDCCH, etc.

[0053] The UE may also determine the TCI state for the UE-specific PDCCH (or the CORESET corresponding to the PDCCH) based on higher layer signaling. For example, one or more (K) TCI states may be set for each CORESET for the UE through RRC signaling.

[0054] The UE may also activate one of the multiple TCI states set by RRC signaling for each CORESET through MAC CE. The MAC CE may also be called TCI State Indication for UE-specific PDCCH MAC CE. The UE may also monitor the CORESET based on the activated TCI state corresponding to the CORESET.

[0055] (TCI status of PDSCH)

[0056] The information related to the QCL between the PDSCH (or the DMRS antenna port associated with the PDSCH) and a certain DL-RS may also be referred to as the TCI state for the PDSCH, etc.

[0057] The UE may also be notified (set) of M (M≥1) TCI states for PDSCH (QCL information for M PDSCHs) through higher layer signaling. In addition, the number M of TCI states set for the UE may also be limited by at least one of the UE capability and the QCL type.

[0058] The DCI used in the scheduling of the PDSCH may also include a field indicating the TCI state for the PDSCH (for example, it may also be referred to as a TCI field, a TCI state field, etc.). The DCI may also be used in the scheduling of the PDSCH of a cell, for example, it may also be referred to as DL DCI, DL allocation, DCI format 1_0, DCI format 1_1, etc.

[0059] Whether the TCI field is included in the DCI can also be controlled by information notified from the base station to the UE. The information can also be information indicating whether the TCI field is present or absent in the DCI (for example, TCI presence information, TCI presence information in DCI, and high-level parameter TCI-PresentInDCI). The information can also be set to the UE through high-level signaling, for example.

[0060] When more than 8 types of TCI states are set for the UE, MAC CE can also be used to activate (or specify) less than 8 types of TCI states. The MAC CE can also be called UE-specific PDSCH TCI state activation / deactivation MAC CE (TCI States Activation / Deactivation for UE-specific PDSCH MAC CE). The value of the TCI field in the DCI can also represent one of the TCI states activated by the MAC CE.

[0061] When the UE sets TCI existence information to "valid (enabled)" for the CORESET that schedules PDSCH (the CORESET used in the PDCCH transmission that schedules PDSCH), the UE may also assume that the TCI field exists in the DCI format 1_1 of the PDCCH sent on the CORESET.

[0062] Regarding the application of the TCI status of PDSCH, multiple scenarios such as the following are considered.

[0063] <Scenario 0>

[0064] It is assumed that a high-level parameter (e.g., tci-PresentInDCI) indicating whether a field for specifying a TCI state (e.g., TCI field) exists in DCI is set to be valid, and the time offset is greater than a threshold value (e.g., timeDurationForQCL). In this case, a specific (e.g., 3-bit) DCI field (e.g., TCI field) may exist in a specific DCI format, and the DCI field may indicate any one (one) TCI state of a maximum of 8 activated TCI states of the PDSCH. The specific DCI format may also be, for example, DCI format 1_1 or 1_2.

[0065] When the time offset between the received DCI (or PDCCH) and the corresponding PDSCH is greater than a threshold, the UE may also assume that the DMRS port of the PDSCH and the reference signal (RS) in the TCI state indicated by the DCI are QCL.

[0066] The time offset (e.g., time offset) corresponds to the period between the reception of a DL DCI (or PDCCH) and the reception of the corresponding PDSCH. The threshold (e.g., timeDurationForQCL) to which the time offset is compared may also be based on the UE capability reported for determining the PDSCH antenna port QCL. The time offset may also refer to the period between the last symbol of the PDCCH (or DCI / CORESET) and the first symbol of the PDSCH in the time domain.

[0067] In addition, the above-mentioned threshold may also be referred to as the time length for QCL (duration (time duration)), "timeDurationForQCL", "threshold (Threshold)", "threshold for offset between aDCI indicating a TCIstate and a PDSCH scheduled by the DCI" (Threshold for offset between aDCI indicating a TCIstate and a PDSCH scheduled by the DCI)", "Threshold-Sched-Offset", time offset threshold, scheduling offset threshold, scheduling offset threshold, etc.

[0068] The QCL time length may also be based on UE capabilities, for example, based on the delay required for decoding of the PDCCH and beam switching. The QCL time length may also be the minimum time required by the UE for PDCCH reception and application of spatial QCL information received in the DCI for PDSCH processing. The QCL time length may be expressed as a number of symbols per subcarrier interval or as a time (e.g., μs). The information on the QCL time length may be reported from the UE to the base station as UE capability information or may be set to the UE from the base station using higher layer signaling.

[0069] <Scenario 1>

[0070] Regardless of whether tci-PresentInDCI is valid or not, when the time offset is less than the threshold, the UE does not apply (cannot apply) the TCI state specified by DCI in the reception of the corresponding PDSCH. That is, the UE does not (cannot) switch the TCI state of the PDSCH based on DCI. In this case, the UE may also apply the default TCI state. The default TCI state may also be the TCI state corresponding to the lowest CORESET ID in the latest monitoring time slot.

[0071] For example, without relying on the structure of tci-PresentInDCI and tci-PresentInDCI-ForFormat1_2 in RRC connected mode, and all TCI code points are mapped to a single TCI state, and the time offset is less than a threshold, the UE may also assume that the DM-RS port of the PDSCH of the serving cell and the RS associated with the QCL parameters used in the QCL indication of the PDCCH of a specific CORESET are QCL. The specific CORESET is associated with the monitored search space with the lowest controlResourceSetId in the latest time slot among one or more CORESETs monitored by the UE within the activated BWP of the serving cell. In addition, in the present disclosure, the condition "within the latest time slot" (within the latest monitored time slot) may also be omitted.

[0072] <Scenario 2>

[0073] When tci-PresentInDCI is not enabled by RRC, the 3-bit DCI field (TCI field) does not exist in DCI format 1_1 (DL allocation), and the DCI field cannot indicate any (one) TCI state of the maximum 8 activated TCI states of PDSCH. In this case, the UE applies the default TCI state in PDSCH.

[0074] For example, it is assumed that tci-PresentInDCI does not become valid (PDSCH is scheduled by a DCI format without a TCI field), and the time offset is greater than a threshold (timeDurationForQCL). In this case, the UE may also assume that the default TCI state is the TCI state of the scheduled CORESET (the used CORESET) (the same as the TCI state), and apply the TCI state to the PDSCH (for example, assuming that it is the QCL / TCI corresponding to the PDSCH).

[0075] (Multiple TRP)

[0076] In NR, one or more transmission / reception points (Transmission / Reception Point (TRP)) (Multi-TRP) are being studied to use one or more panels (Multi-panel) to perform DL transmissions to the UE. In addition, the UE is being studied to perform UL transmissions to one or more TRPs.

[0077] In addition, multiple TRPs may correspond to the same cell identifier (cell identifier (ID)) or different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0078] Figure 1A-Figure 1D is a diagram showing an example of a multi-TRP scenario. In these examples, it is assumed that each TRP is capable of sending four different beams, but is not limited to this.

[0079] Figure 1A An example is shown in which only one TRP (in this example, TRP1) among multiple TRPs transmits to the UE (may also be referred to as single mode, single TRP, etc.). In this case, TRP1 transmits both a control signal (PDCCH) and a data signal (PDSCH) to the UE.

[0080] Figure 1B An example of a situation (also referred to as single-master mode) in which only one TRP (in this example, TRP1) among multiple TRPs sends a control signal to the UE and the multiple TRPs send data signals is shown. The UE receives each PDSCH sent from the multiple TRPs based on one downlink control information (Downlink Control Information (DCI)).

[0081] Figure 1CAn example of a situation (also referred to as master-slave mode) in which each of multiple TRPs sends a portion of a control signal to a UE and the multiple TRPs send data signals is shown. Part 1 of the control signal (DCI) may also be sent in TRP1, and part 2 of the control signal (DCI) may also be sent in TRP2. Part 2 of the control signal may also depend on part 1. Based on these parts of the DCI, the UE receives each PDSCH sent from the multiple TRPs.

[0082] Figure 1D An example of a situation (also referred to as multi-master mode) in which each of the multiple TRPs sends a different control signal to the UE and the multiple TRPs send data signals is shown. The first control signal (DCI) may also be sent in TRP1, and the second control signal (DCI) may also be sent in TRP2. Based on these DCIs, the UE receives each PDSCH sent from the multiple TRPs.

[0083] When using a DCI to schedule Figure 1B In the case of multiple PDSCHs (also called multiple PDSCHs) with multiple TRPs, the DCI can also be called a single DCI (S-DCI, single PDCCH). Figure 1D In the case of multiple PDSCHs in such multiple TRPs, these multiple DCIs can also be called multi-DCI (M-DCI, multiple PDCCH).

[0084] Different code words (Code Word (CW)) and different layers may be transmitted from each TRP of the multiple TRPs. As one method of transmitting multiple TRPs, non-coherent joint transmission (NCJT) is being studied.

[0085] In NCJT, for example, TRP1 performs modulation mapping and layer mapping on a first codeword, and uses a first precoding for a first number of layers (e.g., two layers) to send a first PDSCH. In addition, TRP2 performs modulation mapping and layer mapping on a second codeword, and uses a second precoding for a second number of layers (e.g., two layers) to send a second PDSCH.

[0086] In addition, multiple PDSCHs (multi-PDSCHs) that are NCJTed may also be defined as partially or completely overlapping with respect to at least one of the time domain and the frequency domain. That is, at least one of the time and frequency resources of the first PDSCH from the first TRP and the second PDSCH from the second TRP may also overlap.

[0087] It can also be assumed that the first PDSCH and the second PDSCH are not in a quasi-co-location (QCL) relationship (not quasi-co-located). The reception of multiple PDSCHs can also be replaced by the simultaneous reception of PDSCHs that are not of a certain QCL type (eg, QCL type D).

[0088] Research is underway to support repetition of PDSCH (transport block (TB) or codeword (CW)) across multiple TRPs in URLLC for multiple TRPs. Research is underway to support repetition across multiple TRPs in the frequency domain or layer (space) domain or time domain (URLLC schemes, e.g., schemes 1, 2a, 2b, 3, 4). In scheme 1, multiple PDSCHs from multiple TRPs are space division multiplexing (SDM). In schemes 2a and 2b, PDSCHs from multiple TRPs are frequency division multiplexing (FDM). In scheme 2a, the redundancy version (RV) is the same for multiple TRPs. In scheme 2b, the RVs can be the same or different for multiple TRPs. In schemes 3 and 4, multiple PDSCHs from multiple TRPs are time division multiplexing (TDM). In scheme 3, multiple PDSCHs from multiple TRPs are sent in one time slot. In Scheme 4, multiple PDSCHs from multiple TRPs are sent in different time slots.

[0089] Based on such a multi-TRP scenario, more flexible transmission control using channels of good quality can be performed.

[0090] NCJT using multiple TRPs / panels has the possibility of using high rank. In order to support ideal and non-ideal backhaul between multiple TRPs, it is also possible to support single DCI (single PDCCH, for example, Figure 1B ) and multiple DCI (multiple PDCCH, e.g. Figure 1D ) For both single DCI and multiple DCI, the maximum number of TRPs can also be 2.

[0091] For single PDCCH design (mainly for ideal backhaul), the extension of TCI is being studied. Each TCI code point in DCI can also correspond to one or two TCI states. The TCI field size can also be the same as Rel.15.

[0092] However, after Rel.17, it is also envisioned that PDCCH repetition is applied in PDCCH (or DCI) sent from more than one TRP. For example, consider using multiple PDCCH (or DCI) sent from more than one TRP to schedule more than one signal / channel or send / receive instructions.

[0093] The PDCCH / DCI to which repetitive transmission is applied may also be referred to as multi-PDCCH / multi-DCI. The repetitive transmission of PDCCH may also be replaced by PDCCH repetition, multiple transmission of PDCCH, multi-PDCCH transmission or multiple PDCCH transmission.

[0094] Multiple PDCCHs / multiple DCIs may also be sent from different TRPs. The multiple PDCCHs / DCIs may also be multiplexed by time multiplexing (TDM) / frequency multiplexing (FDM) / spatial multiplexing (SDM). For example, when time multiplexing is used to repeat PDCCHs (TDM PDCCH repetition), PDCCHs sent from different TRPs are allocated to different time domains.

[0095] It is assumed that the multiple PDCCH / DCI is used to schedule more than one physical shared channel. For example, the more than one physical shared channel may be the same (or one) physical shared channel, or multiple physical shared channels scheduled in the same time domain. In such a case, how to control the QCL / TCI corresponding to the physical shared channel (e.g., PDSCH) scheduled by multiple PDCCHs (or DCIs) sent in different time domains becomes a problem.

[0096] For example, how the UE determines the time offset between multiple PDCCHs (or DCIs) transmitted in different time domains and the shared channels (eg, PDSCHs) scheduled by the multiple PDCCHs becomes a problem (see Figure 2 ).

[0097] Figure 2 An example is shown in which PDCCH is repeatedly transmitted (or configured) in time slots #n to #n+1, and PDSCH is scheduled in time slot #n+2 through multiple PDCCHs. The PDCCH (or control resource set) configured in each time slot can be configured in the entire time domain in the time slot (e.g., all code elements) or in a part of the time domain (e.g., a part of continuous or non-continuous code elements).

[0098] In this case, how the UE determines the time offset between the PDSCH and the PDCCH / DCI that schedules the PDSCH becomes a problem.

[0099] Alternatively, when the PDCCH / DCI does not contain information related to the TCI status (for example, the TCI field), how the UE determines the QCL / TCI corresponding to the PDSCH (or the quasi-co-location of the antenna port of the PDSCH) becomes a problem.

[0100] The inventors of the present invention studied how a UE determines the QCL / TCI corresponding to a physical shared channel when a plurality of PDCCHs / DCIs are used to schedule the physical shared channel, and came up with the present embodiment.

[0101] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, each of the following aspects may be used alone or in combination of at least two.

[0102] In addition, in the present disclosure, "A / B" may be replaced by at least one of A and B, and "A / B / C" may be replaced by at least one of A, B, and C.

[0103] In addition, in the following description, the case where PDSCH is scheduled through PDCCH / DCI is used as an example, but it is not limited to this. It can also be applied when PUSCH is scheduled through PDCCH / DCI. In the following description, TCI / QCL can also be replaced by TCI state / QCL assumption.

[0104] In the following description, the case where PDCCH repetition (or multiple PDCCHs) are sent in different time slots (inter-slot PDCCH repetition) is used as an example for description, but the transmission of PDCCH is not limited to time slots. The present disclosure can also be applied to the case where PDCCH repetition (or multiple PDCCHs) are sent in the same time slot (intra-slot PDCCH repetition), the case where PDCCH is sent in mini-slot / sub-slot units, or the case where PDCCH is sent in specific code units.

[0105] (First method)

[0106] In the first aspect, an example of a method for determining a time offset between PDCCH / DCI and PDSCH when a plurality of PDCCH / DCIs are used to schedule a PDSCH will be described.

[0107] In PDCCH repetitions (e.g., TDM PDCCH repetitions) sent in different time domains, the time offset between the reception of a PDCCH (or DCI) and the corresponding PDSCH may also be determined based on a specific PDCCH. That is, the UE may also select a specific PDCCH (or DCI) from a plurality of PDCCHs (or DCIs), and determine whether the time offset between the specific PDCCH and the corresponding PDSCH is above a certain threshold (e.g., timeDurationForQCL).

[0108] The specific PDCCH (or DCI) may be at least one of the following options 1-1 to 1-5.

[0109] <Option 1-1>

[0110] The specific PDCCH used to determine the time offset may be determined based on the transmission timing / transmission order of each PDCCH in the time domain.

[0111] For example, the PDCCH that is first transmitted in the time domain (for example, the first PDCCH (1st PDCCH)) may be a specific PDCCH (see Figure 3A ). Figure 3A An example is shown in which PDCCH#1 and #2 are repeatedly transmitted in time slots #n to #n+1, and PDSCH is scheduled in time slot #n+2 through PDCCH#1 and #2. Figure 3A , the case where the number of repetitions of the PDCCH is 2 is shown, but the number of repetitions of the PDCCH is not limited to this, and may be 3 or more.

[0112] In this case, the UE may also transmit the first PDCCH (1st PDCCH) ( Figure 3A The time offset between PDCCH#1 in the QCL and PDSCH (the first PDCCH-PDSCH (1st PDCCH-PDSCH)) is compared with a certain threshold (for example, timeDurationForQCL).

[0113] When the time offset between the first PDCCH and PDSCH (1st PDCCH-PDSCH) is less than a certain threshold (or less than a certain threshold), the UE may also assume that the PDSCH scheduled by multiple PDCCH / DCI corresponds to a specific default QCL / TCI. In the present disclosure, the specific default QCL / TCI may be defined by a specification or set to the UE from the base station using high-layer signaling. A certain threshold (e.g., timeDurationForQCL) may be set to the UE from the base station through high-layer signaling or determined based on the UE capabilities reported by the UE.

[0114] When the time offset between the first PDCCH and PDSCH (1st PDCCH-PDSCH) becomes greater than a certain threshold, the UE may also assume that the PDSCH scheduled through multiple PDCCH / DCI corresponds to the TCI (or the QCL corresponding to the TCI) specified by the DCI (case 1). When the TCI is not notified through the DCI (or the TCI field is not included in the DCI), the UE may also assume that the PDSCH scheduled through multiple PDCCH / DCI corresponds to a specific default QCL / TCI (case 2).

[0115] In the present disclosure, the specific default QCL / TCI in scenario 2 may also be different from the specific default QCL / TCI applied when the time offset is less than a certain threshold. For example, the specific default QCL / TCI in scenario 2 may also be determined based on the CORESET / transmission parameters corresponding to the specific PDCCH / DCI.

[0116] Alternatively, the specific PDCCH may be the PDCCH that is transmitted last in the time domain (for example, the last PDCCH (last PDCCH)) (see Figure 3B In this case, the UE may also transmit the last PDCCH (last PDCCH) ( Figure 3B The time offset between PDCCH#2) and PDSCH in is compared with the threshold.

[0117] <Option 1-2>

[0118] The specific PDCCH used to determine the time offset may be determined based on the TCI state (eg, the index / TCI ID of the TCI state) corresponding to each PDCCH.

[0119] For example, the PDCCH corresponding to the TCI state with the lowest index (PDCCH with lowest TCI state ID) may also be a specific PDCCH. In this case, the UE may also compare the time offset between the PDCCH-PDSCH corresponding to the TCI state with the lowest index with a certain threshold (e.g., timeDurationForQCL).

[0120] When the time offset between PDCCH and PDSCH corresponding to the TCI state with the lowest index is less than a certain threshold, the UE may also assume that the PDSCH scheduled through multiple PDCCHs / DCIs corresponds to a specific default QCL / TCI.

[0121] When the time offset between PDCCH and PDSCH corresponding to the TCI state with the lowest index becomes greater than a certain threshold, the UE may also assume that the PDSCH scheduled through multiple PDCCH / DCI corresponds to the TCI specified by the DCI (or the QCL corresponding to the TCI) (Case 1). When the TCI is not notified through the DCI (or the TCI field is not included in the DCI), the UE may also assume that the PDSCH scheduled through multiple PDCCH / DCI corresponds to a specific default QCL / TCI (Case 2).

[0122] Alternatively, the specific PDCCH may be the PDCCH corresponding to the TCI state with the highest index (PDCCH with highest TCI state ID). In this case, the UE may also compare the time offset between the PDCCH and PDSCH corresponding to the TCI state with the highest index with a certain threshold.

[0123] <Options 1-3>

[0124] The specific PDCCH used in determining the time offset may also be determined based on the TRP (eg, TRP index / TRP ID) corresponding to each PDCCH. The TRP index / TRP ID may also be replaced with a CORESET pool index / CORESET pool ID (CORESET Pool ID).

[0125] For example, the PDCCH corresponding to the TRP with the lowest index (PDCCH with lowest TRP ID) may be a specific PDCCH. In this case, the UE may also compare the time offset between the PDCCH-PDSCH corresponding to the TRP with the lowest index with a certain threshold (for example, timeDurationForQCL).

[0126] When the time offset between PDCCH and PDSCH corresponding to the TRP with the lowest index is less than a certain threshold, the UE may also assume that the PDSCH scheduled through multiple PDCCH / DCI corresponds to a specific default QCL / TCI.

[0127] When the time offset between PDCCH and PDSCH corresponding to the TRP with the lowest index becomes greater than a certain threshold, the UE may also assume that the PDSCH scheduled through multiple PDCCH / DCI corresponds to the TCI (or the QCL corresponding to the TCI) specified through the DCI (case 1). When the TCI is not notified through the DCI (or the TCI field is not included in the DCI), the UE may also assume that the PDSCH scheduled through multiple PDCCH / DCI corresponds to a specific default QCL / TCI (case 2).

[0128] Alternatively, the specific PDCCH may be the PDCCH corresponding to the TRP with the highest index (PDCCH with highest TRP ID). In this case, the UE may also compare the time offset between the PDCCH and PDSCH corresponding to the TRP with the highest index with a certain threshold.

[0129] <Options 1-4>

[0130] The specific PDCCH used to determine the time offset may be determined based on the control resource set (for example, CORESET index / CORESET ID) corresponding to each PDCCH.

[0131] For example, the PDCCH corresponding to the CORESET with the lowest index (PDCCH with lowest CORESET ID) may be a specific PDCCH. In this case, the UE may also compare the time offset between the PDCCH-PDSCH corresponding to the CORESET with the lowest index with a certain threshold (e.g., timeDurationForQCL).

[0132] When the time offset between the PDCCH and the PDSCH corresponding to the CORESET with the lowest index is less than a certain threshold, the UE may also assume that the PDSCH scheduled through multiple PDCCHs / DCIs corresponds to a specific default QCL / TCI.

[0133] When the time offset between PDCCH and PDSCH corresponding to the CORESET with the lowest index becomes above a certain threshold, the UE may also assume that the PDSCH scheduled through multiple PDCCH / DCI corresponds to the TCI (or the QCL corresponding to the TCI) specified through the DCI (case 1). When the TCI is not notified through the DCI (or the TCI field is not included in the DCI), the UE may also assume that the PDSCH scheduled through multiple PDCCH / DCI corresponds to a specific default QCL / TCI (case 2).

[0134] Alternatively, the specific PDCCH may be the PDCCH corresponding to the CORESET with the highest index (PDCCH with highest CORESET ID). In this case, the UE may compare the time offset between the PDCCH and the PDSCH corresponding to the CORESET with the highest index with a certain threshold.

[0135] <Options 1-5>

[0136] The specific PDCCH used in determining the time offset may also be determined based on the frequency domain to which each PDCCH corresponds (e.g., control channel element index / CCE index (CCE index)). Options 1-5 may also be applied when multiple PDCCH / DCI are sent in different time domains and different frequency domains (TDM+FDM).

[0137] For example, the PDCCH corresponding to the CCE with the lowest index (PDCCH with lowest CCE index) may be a specific PDCCH. In this case, the UE may also compare the time offset between the PDCCH and PDSCH corresponding to the CCE with the lowest index with a certain threshold (e.g., timeDurationForQCL).

[0138] When the time offset between the PDCCH and the PDSCH corresponding to the CCE with the lowest index is less than a certain threshold, the UE may also assume that the PDSCH scheduled through multiple PDCCHs / DCIs corresponds to a specific default QCL / TCI.

[0139] When the time offset between the PDCCH and PDSCH corresponding to the CCE with the lowest index becomes greater than a certain threshold, the UE may also assume that the PDSCH scheduled through multiple PDCCH / DCI corresponds to the TCI (or the QCL corresponding to the TCI) specified by the DCI (case 1). When the TCI is not notified by the DCI (or the TCI field is not included in the DCI), the UE may also assume that the PDSCH scheduled through multiple PDCCH / DCI corresponds to a specific default QCL / TCI (case 2).

[0140] Alternatively, the specific PDCCH may be the PDCCH corresponding to the CCE with the highest index (PDCCH with highest CCE index). In this case, the UE may compare the time offset between the PDCCH and the PDSCH corresponding to the CCE with the highest index with a certain threshold.

[0141] In this way, when the PDSCH is scheduled by repeatedly transmitted PDCCH / DCI (or multiple PDCCH / DCI), the UE can also determine the time offset between PDCCH-PDSCH based on a specific PDCCH / DCI among the multiple PDCCH / DCIs. Thus, even when the PDSCH is scheduled using multiple PDCCH / DCIs transmitted in different time domains, the PDSCH can be properly received.

[0142] In addition, at least one of options 1-1 to 1-5 may also be applied to the case where the TCI / QCL (or default TCI / QCL) for PDSCH follows the operation of Rel.16 or later (e.g., Rel.16 or Re.17). The operation of Rel.17 (R17 behavior) may also be the case where the QCL / default QCL for PDSCH follows a set / activated / indicated unified TCI state (e.g., unified TCI state).

[0143] (Second method)

[0144] In the second aspect, an example of default TCI / QCL applied / assumed in a PDSCH scheduled by multiple PDCCH / DCI is described. Here, it is assumed that different CORESETs are used for PDCCH repetitions (eg, multiple PDCCHs transmitted in different time domains).

[0145] The default TCI / QCL may also be, for example, the default TCI / QCL applied / assumed when the time offset is above a certain threshold and TCI is not notified through DCI (or the TCI field is not included in DCI). For example, the TCI / QCL described below may also be applied to the default QCL / TCI in scenario 2 of the first method.

[0146] It is assumed that in a situation where the time offset between a specific PDCCH and PDSCH becomes above a certain threshold, the TCI state is not notified through the DCI (or the TCI field is not included in the DCI). A certain threshold can also be determined based on capability information reported by the UE (e.g., UE capability). In this case, in order to determine the quasi co-location of the antenna port of the PDSCH (e.g., PDSCH antenna port quasi co-location), the UE can also assume that the TCI state / QCL for the PDSCH is the same as the TCI / QCL corresponding to the CORESET used in the PDCCH transmission.

[0147] On the other hand, when different CORESETs are used for repeated transmission of PDCCH (for example, multiple PDCCHs transmitted in different time domains), the UE needs to judge / determine which CORESET's TCI / QCL corresponds to the TCI / QCL of the PDSCH. The following describes a method for determining the TCI / QCL applied / corresponding to the PDSCH.

[0148] <PDSCH transmission in a single TRP>

[0149] It is assumed that PDCCH repetition (for example, multiple PDCCHs transmitted in different time domains) is transmitted in multiple CORESETs respectively. The PDCCH repetition can also be scheduled to be transmitted from a single TRP PDSCH.

[0150] In the present disclosure, PDSCH transmission in a single TRP (S-TRP PDSCH Tx) may also mean that PDSCH transmission or PDSCH repetition with (or utilizing) a single TCI / QCL is set / activated / indicated. In this case, PDSCH transmission / PDSCH repetition with multiple TCI / QCL may also be set to be valid through higher layer / MAC CE / DCI.

[0151] When the time offset between PDCCH / DCI-PDSCH is above a certain threshold and TCI is not notified through DCI (or TCI field is not included in DCI), the UE may also assume that the TCI / QCL corresponding to PDSCH is the same as the TCI / QCL for a specific CORESET (see Figure 4 ).

[0152] Figure 4 An example is shown in which PDCCH#1 and #2 are repeatedly transmitted in time slots #n to #n+1, and PDSCH is scheduled in time slot #n+2 through PDCCH#1 and #2. Figure 4 In FIG. 1 , the case where the number of repetitions of the PDCCH is 2 is shown, but the number of repetitions of the PDCCH is not limited thereto, and may be 3 or more. In addition, here, the case where the PDCCH#1 is used as a reference in determining the time offset is shown, but the present invention is not limited thereto.

[0153] On the first PDCCH (1st PDCCH) ( Figure 4 When the time offset between PDCCH#1) and PDSCH in the UE is above a certain threshold (for example, timeDurationForQCL) and no information related to TCI is included in the DCI (for example, DCI#1 / DCI#2), the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL for the specific CORESET.

[0154] The specific CORESET may be at least one of the following options 2-1 to 2-5.

[0155] [Option 2-1]

[0156] A specific CORESET may be determined based on a CORESET index / CORESET ID used in each PDCCH repetition (or each PDCCH transmission).

[0157] For example, the CORESET with the lowest index (CORESET with lowest CORESET ID) among multiple CORESETs used in PDCCH repetition may be a specific CORESET. In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL used for the CORESET with the lowest index.

[0158] Alternatively, the specific CORESET may be the CORESET with the highest index (CORESET with highest CORESET ID) among multiple CORESETs used in PDCCH repetition. In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL used for the CORESET with the highest index.

[0159] [Option 2-2]

[0160] A specific CORESET may also be determined based on a TRP index / TRP ID corresponding to each PDCCH repetition (or each PDCCH transmission). The TRP index / TRP ID may also be replaced with a CORESET pool index / CORESET pool ID (CORESETPool ID).

[0161] For example, the CORESET corresponding to the TRP with the lowest index among multiple TRPs (or CORESET pools) used in PDCCH repetitions (CORESET with lowest TRP ID) may be a specific CORESET. In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL used for the CORESET corresponding to the TRP with the lowest index.

[0162] Alternatively, the specific CORESET may be the CORESET corresponding to the TRP with the highest index among multiple CORESETs used in PDCCH repetition (CORESET with highest TRP ID). In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL used for the CORESET corresponding to the TRP with the highest index.

[0163] [Option 2-3]

[0164] A specific CORESET may be determined based on the TCI state index / TCI state ID corresponding to each PDCCH repetition (or each PDCCH transmission).

[0165] For example, the CORESET corresponding to the TCI state with the lowest index among multiple TCI states used in PDCCH repetition (CORESET with lowest TCI state ID) may be a specific CORESET. In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL used by the CORESET corresponding to the TCI state with the lowest index.

[0166] Alternatively, the specific CORESET may be the CORESET corresponding to the TCI state with the highest index among multiple TCIs used in PDCCH repetitions (CORESET with highest TCIstate ID). In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL used by the CORESET corresponding to the TCI state with the highest index.

[0167] [Option 2-4]

[0168] A specific CORESET may be determined based on the transmission timing / transmission order in the time domain of the CORESETs corresponding to each PDCCH repetition (or each PDCCH transmission).

[0169] For example, the CORESET corresponding to the first PDCCH (e.g., the first PDCCH (1st PDCCH)) sent among the multiple CORESETs used in the PDCCH repetition may be a specific CORESET. In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL used for the CORESET corresponding to the first PDCCH in the time domain.

[0170] Alternatively, the specific CORESET may be the CORESET corresponding to the last PDCCH transmitted (e.g., the last PDCCH) among the multiple CORESETs used in the PDCCH repetition. In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL used for the CORESET corresponding to the last PDCCH in the time domain.

[0171] [Option 2-5]

[0172] A specific CORESET may be determined based on the frequency domain (eg, control channel element index / CCE index (CCE index)) of the CORESET corresponding to each PDCCH repetition (or each PDCCH transmission).

[0173] For example, the CORESET corresponding to the CCE with the lowest index among multiple CORESETs used in PDCCH repetition (CORESET with lowest CCE index) may be a specific CORESET. In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL used for the CORESET corresponding to the CCE with the lowest index.

[0174] Alternatively, the specific CORESET may be the CORESET corresponding to the CCE with the highest index among multiple CORESETs used in PDCCH repetition (CORESET with highest CCEindex). In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL used for the CORESET corresponding to the CCE with the highest index.

[0175] <PDSCH transmission in multiple TRPs>

[0176] It is assumed that PDCCH repetition (for example, multiple PDCCHs transmitted in different time domains) is transmitted in multiple CORESETs respectively. The PDCCH repetition can also be scheduled to be transmitted from multiple TRPs.

[0177] In the present disclosure, PDSCH transmission in multiple TRP (M-TRP PDSCH Tx) may also mean that PDSCH transmission or PDSCH repetition with (or utilizing) multiple TCI / QCL (multiple TCIs / QCLs (multiple TCIs / QCLs)) is set to be valid through high layer / MACCE / DCI. In this case, PDSCH transmission or PDSCH repetition with (or utilizing) multiple TCI / QCL may also be set / activated / indicated.

[0178] When the time offset between PDCCH / DCI-PDSCH is above a certain threshold and TCI is not notified through DCI (or the TCI field is not included in DCI), the UE can also assume that the multiple TCI / QCLs corresponding to PDSCH are the same as the TCI / QCLs used for multiple CORESETs used in each PDCCH transmission.

[0179] The association (or mapping) between multiple TCI states (e.g., multiple default TCI states) and multiple PDSCH repetitions may also be the same as the case where multiple TCI states are set / activated / specified for a PDSCH. For example, the TCI / QCI of a PDSCH scheduled via a certain PDCCH may also be associated with the TCI / QCL corresponding to the PDCCH (or the CORESET corresponding to the PDCCH).

[0180] Alternatively, when the time offset between PDCCH / DCI-PDSCH is above a certain threshold and TCI is not notified through DCI (or the TCI field is not included in DCI), the UE may also assume that the multiple TCI / QCLs corresponding to the PDSCH are the same as the TCI / QCL for a specific CORESET. The specific CORESET may also be determined based on at least one of the above options 2-1 to 2-5. For example, it may be determined in the same way as PDSCH transmission in a single TRP.

[0181] In this way, even when information related to the TCI state is not notified through DCI, by utilizing the TCI / QCL corresponding to a specific CORESET for PDSCH reception, communication can be appropriately controlled even when PDCCH is repeatedly applied.

[0182] In addition, in the above description, the case where the time offset between PDCCH / DCI-PDSCH is greater than a certain threshold and TCI is not notified through DCI (or the TCI field is not included in DCI) is cited as an example, but the case where the second method can be applied is not limited to this. The second method can also be applied in the case where information related to TCI specified by DCI (for example, TCI field) cannot be used in the determination of TCI / QCL corresponding to PDSCH, and the case where the second method can be applied can also be defined by the specification.

[0183] (Third Method)

[0184] In the third aspect, an example of default TCI / QCL applied / assumed in a PDSCH scheduled by multiple PDCCH / DCI is described. Here, it is assumed that one CORESET (or a common CORESET) is used for PDCCH repetitions (e.g., multiple PDCCHs transmitted in different time domains).

[0185] The default TCI / QCL may also be, for example, the default TCI / QCL applied / assumed when the time offset is above a certain threshold and TCI is not notified through DCI (or the TCI field is not included in DCI). For example, the TCI / QCL described below may also be applied to the default QCL / TCI in scenario 2 of the first method.

[0186] It is assumed that in a situation where the time offset between a specific PDCCH and PDSCH becomes above a certain threshold, the TCI state is not notified through the DCI (or the TCI field is not included in the DCI). A certain threshold can also be determined based on capability information reported by the UE (e.g., UE capability). In this case, in order to determine the quasi co-location of the antenna port of the PDSCH (e.g., PDSCH antenna port quasi co-location), the UE can also assume that the TCI state / QCL for the PDSCH is the same as the TCI / QCL corresponding to the CORESET used in the PDCCH transmission.

[0187] On the other hand, when one CORESET (or a common CORESET) is used for repeated transmission of PDCCH (for example, multiple PDCCHs transmitted in different time domains), the UE needs to judge / determine a specific TCI / QCL (for example, a default TCI / QCL) corresponding to the TCI / QCL of the PDSCH. The following describes a method for determining a specific TCI / QCL applied to / corresponding to the PDSCH.

[0188] <PDSCH transmission in a single TRP>

[0189] It is assumed that PDCCH repetition (for example, multiple PDCCHs transmitted in different time domains) is transmitted in one CORESET. The PDCCH repetition can also be scheduled to be transmitted from a single TRP PDSCH.

[0190] When the time offset between PDCCH / DCI-PDSCH is above a certain threshold and TCI is not notified through DCI (or the TCI field is not included in DCI), the UE can also assume that the TCI / QCL corresponding to PDSCH is the same as the specific TCI / QCL.

[0191] The specific TCI / QCL may be at least one of the following options 3-1 to 3-5.

[0192] [Option 3-1]

[0193] The specific TCI / QCL may be determined based on the CORESET index / CORESET ID set for PDCCH repetition (or each PDCCH transmission). The CORESET may be replaced with at least one of the search space and the monitoring opportunity.

[0194] For example, the TCI / QCL corresponding to the CORESET with the lowest index among the CORESETs that are set to be used repeatedly for PDCCH (QCL with lowest CORESET ID) may be a specific TCI / QCL. In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL used for the CORESET with the lowest index.

[0195] Alternatively, the specific TCI / QCL may be the TCI / QCL corresponding to the CORESET with the highest index (QCL with highest CORESET ID) in the CORESET that is set to be used repeatedly for PDCCH. In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL used for the CORESET with the highest index.

[0196] Alternatively, the TCL / QCL corresponding to one CORESET used in repeated PDCCH transmission may correspond to a specific TCI / QCL.

[0197] [Option 3-2]

[0198] The specific TCI / QCL may also be determined based on the TRP index / TRPID corresponding to each PDCCH repetition (or each PDCCH transmission). The TRP index / TRP ID may also be replaced with a CORESET pool index / CORESET pool ID (CORESET PoolID).

[0199] For example, the TCI / QCL (QCL with lowest TRP ID) corresponding to the TRP with the lowest index among multiple TRPs (or CORESET pools) used in PDCCH repetition may also be a specific TCI / QCL. In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL corresponding to the TRP with the lowest index.

[0200] Alternatively, the specific TCI / QCL may be the TCI / QCL corresponding to the TRP with the highest index among multiple CORESETs used in PDCCH repetitions (QCL with highest TRP ID). In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL corresponding to the TRP with the highest index.

[0201] [Option 3-3]

[0202] The specific TCI / QCL may be determined based on the TCI state index / TCI state ID corresponding to each PDCCH repetition (or each PDCCH transmission).

[0203] For example, the TCI / QCL corresponding to the TCI state with the lowest index among multiple TCI states used in PDCCH repetition (QCL with lowest TCI state ID) may be a specific TCI / QCL. In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL corresponding to the TCI state with the lowest index.

[0204] Alternatively, the specific TCI / QCL may be the TCI / QCL corresponding to the TCI state with the highest index among multiple TCI states used in PDCCH repetition (QCL with highest TCI state ID). In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL corresponding to the TCI state with the highest index.

[0205] [Option 3-4]

[0206] The specific TCI / QCL may be determined based on the transmission timing / transmission order in the time domain of PDCCH repetition (or each PDCCH transmission).

[0207] For example, the TCI / QCL corresponding to the first PDCCH (e.g., the first PDCCH (1stPDCCH)) sent among multiple PDCCHs may be a specific TCI / QCL. In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL corresponding to the first PDCCH in the time domain.

[0208] Alternatively, regarding the specific TCI / QCL, the TCI / QCL corresponding to the last transmitted PDCCH (e.g., the last PDCCH (last PDCCH)) may be the specific TCI / QCL. In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL corresponding to the last PDCCH in the time domain.

[0209] [Option 3-5]

[0210] The specific TCI / QCL may be determined based on the frequency domain (eg, control channel element index / CCE index (CCE index)) of PDCCH repetition (or each PDCCH transmission).

[0211] For example, the TCI / QCL corresponding to the CCE with the lowest index among multiple PDCCHs (QCL with lowest CCE index) may be a specific TCI / QCL. In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL corresponding to the CCE with the lowest index.

[0212] Alternatively, the specific TCI / QCL may be the TCI / QCL corresponding to the CCE with the highest index (QCL with highest CCE index). In this case, the UE may also assume that the TCI / QCL corresponding to the PDSCH is the same as the TCI / QCL corresponding to the CCE with the highest index.

[0213] <PDSCH transmission in multiple TRPs>

[0214] It is assumed that PDCCH repetition (for example, multiple PDCCHs transmitted in different time domains) is transmitted in one CORESET. The PDCCH repetition can also be scheduled to be transmitted from multiple TRPs.

[0215] When the time offset between PDCCH / DCI-PDSCH is above a certain threshold and TCI is not notified through DCI (or the TCI field is not included in DCI), the UE can also assume that the multiple TCI / QCLs corresponding to the PDSCH are the same as one or more TCI / QCLs corresponding to a CORESET used in each PDCCH transmission.

[0216] The association (or mapping) between one or more TCI states (e.g., multiple default TCI states) and multiple PDSCH repetitions may also be the same as the case where multiple TCI states are set / activated / specified for a PDSCH. For example, the TCI / QCI of a PDSCH scheduled via a certain PDCCH may also be associated with the TCI / QCL corresponding to the PDCCH (or the CORESET corresponding to the PDCCH).

[0217] Alternatively, when the time offset between PDCCH / DCI-PDSCH is above a certain threshold and TCI is not notified through DCI (or the TCI field is not included in DCI), the UE may also assume that the multiple TCI / QCLs corresponding to the PDSCH are the same as the specific TCI / QCL. The same specific TCI / QCL may also be determined based on at least one of the above options 3-1 to 3-5. For example, it may also be determined in the same way as PDSCH transmission in a single TRP.

[0218] In this way, even when information related to the TCI state is not notified through DCI, by utilizing a specific TCI / QCL for PDSCH reception, communication can be appropriately controlled even when PDCCH repetition is applied.

[0219] In addition, in the above description, the case where the time offset between PDCCH / DCI-PDSCH is above a certain threshold and TCI is not notified through DCI (or the TCI field is not included in DCI) is cited as an example, but the case where the third method can be applied is not limited to this. The third method can also be applied in the case where information related to TCI specified by DCI (for example, TCI field) cannot be used in the determination of TCI / QCL corresponding to PDSCH, and the case where the third method can be applied can also be defined by the specification.

[0220] (Fourth Method)

[0221] In the fourth embodiment, an example of UE capability information is described.

[0222] It is also possible to support UE capability information on whether the UE can assume the default TCI / QCL of the PDSCH as the TCI / QCL of the CORESET used in PDCCH transmission during PDCCH repetition.

[0223] It is also possible to support UE capability information on whether the UE can assume the default TCI / QCL of the PDSCH as the TCL / QCL of the CORESET used in the PDCCH transmission in PDCCH iteration using multiple CORESETs (for example, different CORESETs).

[0224] The UE may be controlled to apply at least one of the first to third modes when corresponding UE capability information is reported or when a specific higher layer parameter is configured / activated / indicated.

[0225] (Wireless Communication System)

[0226] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using any one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0227] Figure 5 1 is a diagram showing an example of a schematic structure of a wireless communication system involved in one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), and the like.

[0228] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA))) and NR (E-UTRA-NR Dual Connectivity (E-UTRA-NR Dual Connectivity (EN-DC))), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

[0229] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0230] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0231] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as base stations 10.

[0232] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0233] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to these. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0234] Furthermore, the user terminal 20 may perform communication in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0235] Multiple base stations 10 may also be connected via wired (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station (relay) may also be referred to as an IAB node.

[0236] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0237] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0238] In the wireless communication system 1, a wireless access method based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. may be used.

[0239] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the radio access schemes for UL and DL.

[0240] As downlink channels, the wireless communication system 1 may use a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc.

[0241] In addition, as uplink channels, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20), an uplink control channel (Physical Uplink Control Channel (PUCCH))), a random access channel (Physical Random Access Channel (PRACH)) and the like can also be used in the wireless communication system 1.

[0242] User data, high-layer control information, system information block (SIB), etc. are transmitted through PDSCH. User data, high-layer control information, etc. can also be transmitted through PUSCH. In addition, master information block (MIB) can also be transmitted through PBCH.

[0243] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0244] In addition, the DCI for scheduling the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be replaced by DL data, and the PUSCH may also be replaced by UL data.

[0245] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space setting.

[0246] A search space may also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be interchangeable.

[0247] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) can also be transmitted through PUCCH. The random access preamble used to establish a connection with a cell can also be transmitted through PRACH.

[0248] In the present disclosure, downlink, uplink, etc. may be expressed without the word “link.” In addition, various channels may be expressed without the word “physical” at the beginning.

[0249] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. As DL-RS, in the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. can also be transmitted.

[0250] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SSB), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0251] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0252] (Base Station)

[0253] Figure 61 is a diagram showing an example of a structure of a base station involved in one embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may each be provided with more than one.

[0254] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0255] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0256] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of wireless resources, etc.

[0257] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0258] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0259] The transmitting / receiving antenna 130 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0260] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0261] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0262] The sending and receiving unit 120 (sending processing unit 1211), for example, may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0263] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (Discrete Fourier Transform (DFT)) processing (as needed), inverse fast Fourier transform (Inverse Fast Fourier Transform (IFFT)) processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0264] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0265] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0266] The sending and receiving unit 120 (receiving processing unit 1212) can also apply analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to obtain user data, etc.

[0267] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (Radio Resource Management (RRM)) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (Received Signal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0268] The transmission path interface 140 can also send and receive signals (return signaling) between devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0269] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission and reception unit 120 , the transmission and reception antenna 130 , and the transmission path interface 140 .

[0270] The transmitting and receiving unit 120 may also transmit a physical shared channel scheduled by using a plurality of downlink control channels allocated in different time domains.

[0271] The transmitting and receiving unit 120 may also control at least one of the quasi co-location (QCL) and transmission setting indicator (TCI) states corresponding to the physical shared channel based on a time offset between a specific downlink control channel among multiple downlink control channels and the physical shared channel and a threshold.

[0272] (User Terminal)

[0273] Figure 7 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. In addition, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided with one or more.

[0274] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0275] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0276] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 220.

[0277] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0278] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0279] The transmitting / receiving antenna 230 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0280] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0281] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0282] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0283] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0284] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is valid (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0285] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0286] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230 .

[0287] The sending and receiving unit 220 (receiving processing unit 2212) can also apply analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0288] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0289] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 , the transmitting and receiving antenna 230 , and the transmission path interface 240 .

[0290] The transmitting and receiving unit 220 may also receive a physical shared channel scheduled by a plurality of downlink control channels allocated to different time domains.

[0291] The control unit 210 may also determine at least one of the quasi co-location (QCL) and transmission configuration indicator (TCI) states corresponding to the physical shared channel based on a time offset between a specific downlink control channel among multiple downlink control channels and the physical shared channel and a threshold.

[0292] The control unit 210 may also determine a specific downlink control channel based on the transmission timing of the downlink control channel, the TCI state index corresponding to the downlink control channel, the control resource set pool index corresponding to the downlink control channel, the control resource set index corresponding to the downlink control channel, and at least one of the frequency domains used in the transmission of the downlink control channel.

[0293] In a case where multiple downlink control channels are respectively sent using multiple control resource sets, when the time offset is above a threshold and the TCI field is not included in the specific downlink control information, the control unit 210 may also assume that at least one of the QCL and TCI states corresponding to a specific control resource set among the multiple control resource sets is the same as at least one of the QCL and TCI states corresponding to the physical shared channel.

[0294] In a situation where multiple downlink control channels are respectively sent using a common control resource set, when the time offset is above the threshold and the TCI field is not included in the specific downlink control information, the control unit 210 may also assume that at least one of the QCL and TCI states corresponding to the specific downlink control channel is the same as at least one of the QCL and TCI states corresponding to the physical shared channel.

[0295] (Hardware Structure)

[0296] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly (for example, by wired, wireless, etc.) connected and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0297] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method is not particularly limited.

[0298] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 8 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0299] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. can be used interchangeably. The hardware structure of the base station 10 and the user terminal 20 can be configured to include one or more of the devices shown in the figure, or to exclude some of the devices.

[0300] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0301] The functions of the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0302] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), the sending and receiving unit 120 (220), etc. may also be implemented by the processor 1001.

[0303] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be implemented for other functional blocks.

[0304] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0305] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray (Blu-ray) (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other suitable storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0306] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) may also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0307] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0308] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0309] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0310] (Variation Example)

[0311] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, symbols, and signals (signals or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the standard applied. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0312] A wireless frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a wireless frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0313] Here, the parameter set may also be a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, a wireless frame structure, a specific filter processing performed by a transmitter and receiver in the frequency domain, a specific windowing processing performed by a transmitter and receiver in the time domain, and the like.

[0314] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0315] A time slot may also include multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0316] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be interchangeable.

[0317] For example, a subframe may be referred to as a TTI, a plurality of consecutive subframes may be referred to as a TTI, and a time slot or a mini time slot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0318] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0319] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0320] In addition, when a time slot or a mini time slot is called TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) can also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can also be controlled.

[0321] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0322] In addition, long TTI (e.g., normal TTI, subframe, etc.) can also be replaced by TTI with a time length exceeding 1ms, and short TTI (e.g., shortened TTI, etc.) can also be replaced by TTI with a TTI length smaller than that of long TTI and greater than 1ms.

[0323] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0324] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks, respectively.

[0325] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0326] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0327] Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, common RBs may also be identified by the index of the RB relative to the common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0328] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured in one carrier.

[0329] At least one of the configured BWPs may be activated, and the UE may not assume that it transmits or receives a specific signal / channel other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0330] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0331] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0332] In the present disclosure, the names used for parameters, etc. are not restrictive in all respects. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not restrictive in all respects.

[0333] Information, signals, etc. described in this disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0334] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0335] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0336] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI))), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB)), etc.), Medium Access Control (MAC) signaling), other signals or a combination thereof.

[0337] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (Layer 1 / Layer 2 (L1 / L2)) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0338] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0339] The determination can be made by a value represented by a bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a specific value).

[0340] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0341] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0342] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0343] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0344] In the present disclosure, terms such as "Base Station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro-micro cell, and micro-micro cell.

[0345] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0346] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0347] There are also cases where a mobile station is referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client or several other appropriate terms.

[0348] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device carried in a mobile body, a mobile body, etc. The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous driving vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing a communication operation. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0349] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0350] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0351] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node (uppernode) depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, considering the Mobility Management Entity (MME)), the Serving-Gateway (S-GW), etc., but not limited to these) or a combination thereof.

[0352] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, sequences, flow charts, etc. of the various methods / implementations described in this disclosure may be reversed in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0353] The various modes / implementations described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG)) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems expanded based on them. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0354] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0355] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used or that the first element must take precedence over the second element in some form.

[0356] The term "determining" used in this disclosure may include a variety of actions. For example, "determining" may also refer to situations where judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. are considered to be "determining".

[0357] In addition, "judgment (decision)" may also be a situation where receiving (for example, receiving information), sending (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0358] In addition, "judgment (decision)" can also be regarded as a situation where resolving, selecting, choosing, establishing, comparing, etc. are regarded as a situation where "judgment (decision)" is performed. That is, "judgment (decision)" can also be regarded as a situation where some actions are regarded as a situation where "judgment (decision)" is performed.

[0359] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0360] The “maximum transmit power” recorded in the present disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0361] The terms "connected", "coupled", or all their variations used in this disclosure refer to all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be replaced by "access".

[0362] In the present disclosure, when two elements are connected, it is possible to consider being "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0363] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same way as "different".

[0364] When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms have an inclusive meaning, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not have an exclusive OR meaning.

[0365] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0366] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal, characterized in that: have: A receiving unit, receiving a physical shared channel scheduled through a plurality of downlink control channels allocated in different time domains; as well as a control unit, based on a time offset between a downlink control channel that is last transmitted in the time domain among the multiple downlink control channels and the physical shared channel, and a threshold, determining at least one of a quasi co-location (QCL) and a transmission setting indicator (TCI) state corresponding to the physical shared channel, The control unit, in a case where the plurality of downlink control channels are respectively transmitted using a plurality of control resource sets, assumes that at least one of the QCL and TCI states corresponding to the control resource set with the lowest index among the plurality of control resource sets is the same as at least one of the QCL and TCI states corresponding to the physical shared channel when the time offset is greater than or equal to the threshold and the downlink control information included in the plurality of downlink control channels does not include a TCI field, In the case where the multiple downlink control channels are respectively sent using a common control resource set, when the time offset is greater than the threshold and TCI is not notified through the downlink control information contained in the multiple downlink control channels, it is assumed that at least one of the QCL and TCI states based on the TCI state indexes corresponding to the multiple downlink control channels are the same as at least one of the QCL and TCI states corresponding to the physical shared channel.

2. A wireless communication method for a terminal, characterized in that: have: The step of receiving a physical shared channel scheduled by a plurality of downlink control channels allocated in different time domains; Based on a time offset between a downlink control channel that is sent last in the time domain among the multiple downlink control channels and the physical shared channel, and a threshold, determining at least one of a quasi co-location (QCL) corresponding to the physical shared channel and a sending setting indicator state (TCI) state; and In a case where the plurality of downlink control channels are respectively transmitted using a plurality of control resource sets, when the time offset is greater than or equal to the threshold and the downlink control information included in the plurality of downlink control channels does not include a TCI field, it is assumed that at least one of the QCL and TCI states corresponding to a control resource set with the lowest index among the plurality of control resource sets is the same as at least one of the QCL and TCI states corresponding to the physical shared channel; In the case where the multiple downlink control channels are respectively sent using a common control resource set, when the time offset is greater than the threshold and TCI is not notified through the downlink control information included in the multiple downlink control channels, it is envisaged that at least one of the QCL and TCI states based on the TCI state indexes corresponding to the multiple downlink control channels, and at least one of the steps that are the same as the QCL and TCI states corresponding to the physical shared channel.

3. A base station, characterized in that: have: A sending unit, sending a physical shared channel scheduled by using a plurality of downlink control channels allocated in different time domains; as well as a control unit, based on a time offset between a downlink control channel that is last transmitted in the time domain among the multiple downlink control channels and the physical shared channel, and a threshold, controlling at least one of a quasi co-location (QCL) and a transmission setting indicator (TCI) state corresponding to the physical shared channel, The control unit controls, in a case where the plurality of downlink control channels are respectively transmitted using a plurality of control resource sets, at least one of the QCL and TCI states corresponding to the physical shared channel to be the same as at least one of the QCL and TCI states corresponding to the control resource set with the lowest index among the plurality of control resource sets, when the time offset is greater than or equal to the threshold and the downlink control information included in the plurality of downlink control channels does not include a TCI field, In the case where the multiple downlink control channels are respectively sent using a common control resource set, when the time offset is greater than the threshold and TCI is not notified through the downlink control information included in the multiple downlink control channels, at least one of the QCL and TCI states corresponding to the physical shared channel is controlled to be the same as at least one of the QCL and TCI states based on the TCI state indexes corresponding to the multiple downlink control channels.

4. A system having a terminal and a base station, characterized in that: The terminal has: a receiving unit, receiving a physical shared channel scheduled by a plurality of downlink control channels allocated in different time domains; and a control unit, based on a time offset between a downlink control channel that is last transmitted in the time domain among the multiple downlink control channels and the physical shared channel, and a threshold, determining at least one of a quasi co-location (QCL) and a transmission setting indicator (TCI) state corresponding to the physical shared channel, The control unit, in a case where the plurality of downlink control channels are respectively transmitted using a plurality of control resource sets, assumes that at least one of the QCL and TCI states corresponding to the control resource set with the lowest index among the plurality of control resource sets is the same as at least one of the QCL and TCI states corresponding to the physical shared channel when the time offset is greater than or equal to the threshold and the downlink control information included in the plurality of downlink control channels does not include a TCI field, In a case where the plurality of downlink control channels are respectively transmitted using a common control resource set, when the time offset is greater than the threshold and TCI is not notified through the downlink control information included in the plurality of downlink control channels, it is assumed that at least one of the QCL and TCI states based on the TCI state indexes respectively corresponding to the plurality of downlink control channels is the same as at least one of the QCL and TCI states corresponding to the physical shared channel, The base station has: A sending unit, sending the physical shared channel; and a control unit, based on the time offset and the certain threshold, controlling at least one of a QCL and a TCI state corresponding to the physical shared channel, The control unit controls, in a case where the multiple downlink control channels are respectively transmitted using multiple control resource sets, at least one of the QCL and TCI states corresponding to the physical shared channel to be the same as at least one of the QCL and TCI states corresponding to the control resource set with the lowest index among the multiple control resource sets, when the time offset is greater than the threshold and the TCI field is not included in the downlink control information included in the multiple downlink control channels. In the case where the multiple downlink control channels are respectively sent using a common control resource set, when the time offset is greater than the threshold and TCI is not notified through the downlink control information included in the multiple downlink control channels, at least one of the QCL and TCI states corresponding to the physical shared channel is controlled to be the same as at least one of the QCL and TCI states based on the TCI state indexes corresponding to the multiple downlink control channels.

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