Terminal, wireless communication method and system

Abstract

A terminal according to one aspect of the present disclosure comprises: a reception unit that monitors a downlink control channel (physical downlink control channel (PDCCH)) in a control resource set (CORESET); and a control unit that, in relation to a non-zero power channel state information reference signal (NZP-CSI-RS) resource set for which the upper layer parameter for repetition is on, does not assume that a CSI-RS resource related to the same CORESET pool index as the CORESET pool index of the CORESET is set for a symbol that is set so as to monitor the CORESET. According to the one aspect of the present disclosure, a plurality of channel / signal collisions can be appropriately handled.

Description

[Technical field]

[0001] The present disclosure relates to a terminal, a wireless communication method, and system Regarding. [Background technology]

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

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

[0004] [Non-Patent Document 1] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention [Problem to be solved by the invention]

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

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

[0007] A UE using MTRP-based control should be able to simultaneously receive multiple beams (multiple QCL type D channels / signals). For such UEs, it is considered possible to relax the above-mentioned constraints (priority rules) on collisions of multiple channels / signals. However, the constraints for the case where a UE can simultaneously receive multiple beams (multiple QCL type D channels / signals) have not yet been studied. If this is not studied, the transmission and reception of the UE may be inappropriately restricted, resulting in a decrease in throughput or deterioration of communication quality.

[0008] Therefore, the present disclosure provides a terminal, a wireless communication method, and system One of the aims is to provide. [Means for solving the problem]

[0009] A terminal according to an embodiment of the present disclosure includes: a transmitter unit transmitting capability information indicating that the transmitter unit supports simultaneous reception of quasi-collocation (QCL) type signals for different spatial reception parameters;A control unit that controls reception of a physical downlink shared channel (PDSCH) and a synchronization signal / physical broadcast channel (SS / PBCH) block, and a receiving unit that receives the PDSCH and the SS / PBCH block, wherein the control unit: The transmitting unit transmits the capability information, When two control resource set (CORESET) pool indexes are set and the demodulation reference signal (DMRS) for the PDSCH and the SS / PBCH block are received in the same symbol, the DMRS for the PDSCH and the SS / PBCH block are Q C L We assume that the QCL is of the same type. Effect of the Invention

[0010] According to one aspect of the present disclosure, collisions of multiple channels / signals can be appropriately handled. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing an example of a priority rule when a PDCCH and a PDSCH collide in the existing Rel. 16 specifications. [Diagram 2] FIG. 2 is a diagram showing an example of an mDCI-based MTRP environment for explaining the operation of embodiment 1.1. [Diagram 3] 3A and 3B are diagrams showing an example of a priority rule when a PDCCH and a PDSCH collide in embodiment 1.1. [Figure 4] FIG. 4 is a diagram showing an example of an sDCI-based MTRP environment for explaining the operation of embodiment 1.2. [Diagram 5] 5A and 5B are diagrams showing an example of a priority rule when a PDCCH and a PDSCH collide in embodiment 1.2. [Figure 6] FIG. 6 is a diagram showing an example of a priority rule when an A-CSI-RS and another DL signal (PDSCH) collide according to embodiment 5.2. [Figure 7]FIG. 7 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 8] FIG. 8 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 9] FIG. 9 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 10] FIG. 10 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[0030] In this disclosure, the difference between (the reference RS of) the QCL type D of a certain channel / signal and (the reference RS of) the QCL type D of another channel / signal may mean that the beam used for communication of the certain channel / signal is different from the beam used for communication of the other channel / signal. In this disclosure, the difference between (the reference RS of) the QCL type D of a certain channel / signal and (the reference RS of) the QCL type D of another channel / signal may be expressed as the QCL types D of the certain channel / signal and the other channel / signal being different, their QCL type D characteristics being different, the "QCL types D" being different, etc.

[0031] <PDCCH vs. PDCCH> When a UE is configured for single-cell operation or carrier aggregation operation in the same frequency band, and monitors PDCCH candidates at overlapping monitoring occasions in multiple CORESETs having the same or different QCL type D characteristics in the active DL BWP of one or more cells, it monitors PDCCHs only in a CORESET among the multiple CORESETs and in a CORESET that has the same QCL type D characteristics as the CORESET.

[0032] <PDCCH vs. PDSCH> If the offset (which may be called the scheduling offset) between the reception of DL DCI and the corresponding PDSCH is less than a certain threshold (timeDurationForQCL), the UE may assume that the DMRS port of the PDSCH of a serving cell is a reference signal and QCL for the QCL parameters for the PDCCH of the CORESET with the smallest CORESET ID (controlResourceSetId) associated with the search space monitored in the latest slot in which one or more CORESETs in the active BWP of the serving cell are monitored. In this case, the PDSCH may be expressed as following the default TCI state, referring / assuming the default QCL, etc.

[0033] In case of a PDSCH following the default TCI state, if the DMRS "QCL type D" of the PDSCH is different from the DMRS "QCL type D" of the PDCCH that overlaps with the PDSCH by at least one symbol, the UE may expect to prioritize the reception of the PDCCH associated with the CORESET. Note that these actions may also be applied in case of intra-band Carrier Aggretion (CA) (when the PDSCH and the CORESET are on different component carriers).

[0034] Figure 1 shows an example of priority rules when PDCCH and PDSCH collide in the existing Rel.16 specifications. The PDSCH in this example follows the default TCI state. The left side of the figure shows scheduled channels / signals, and the right side shows the channels / signals resulting from considering the priority rules (similar in the following similar figures).

[0035] In this example, the illustrated PDCCH and PDSCH have different QCL types D and some symbols overlap. In this case, the UE receives the PDCCH with priority, and may not receive (e.g., may drop) the PDSCH that overlaps with the PDCCH (shown in black in the figure). The UE may receive the PDSCH that does not overlap with the PDCCH.

[0036] <CSI-RS vs. PDCCH> For CSI-RS resources associated with a Non Zero Power (NZP)-CSI-RS resource set with the higher layer parameter for repetition ('repetition') set to 'on', the UE does not assume that CSI-RS is configured for symbols configured to monitor the CORESET (i.e. the CORESET and CSI-RS resources in this case do not overlap in time).

[0037] On the other hand, for NZP-CSI-RS resource sets where 'repetition' is not 'on', when the UE configures the CSI-RS resource and the search space set associated with CORESET in the same OFDM symbol, the UE may assume that the CSI-RS and the DMRS of the PDCCH transmitted in all search space sets associated with CORESET are QCL with "QCL type D" (if "QCL type D" is applicable). In other words, for CSI-RS where repetition is not on, the UE may assume the same QCL as the overlapping PDCCH (CORESET). Note that these operations may be applied in the case of intra-band CA (when the CSI-RS and the CORESET are on different component carriers).

[0038] In addition, in the present disclosure, OFDM symbols may be read as symbols and vice versa.

[0039] <CSI-RS vs. SSB> A UE with a CSI-RS resource associated with an NZP-CSI-RS resource set for which higher layer parameters for repetition ('repetition') are configured in the same OFDM symbol as an SS / PBCH block may assume that the CSI-RS and the SS / PBCH block are QCL'd with 'QCL type D' (if 'QCL type D' is applicable). In other words, for a CSI-RS for which higher layer parameters for repetition are configured, the UE may assume the same QCL as the overlapping SS / PBCH block.

[0040] <PDSCH vs. SSB> When a UE receives an SS / PBCH block and a DMRS for a PDSCH in the same OFDM symbol, the UE may assume that the DMRS and the SS / PBCH block are QCL with "QCL Type D" (if "QCL Type D" is applicable). In other words, for a PDSCH, the UE may assume the same QCL as the overlapping SS / PBCH block.

[0041] <A-CSI-RS vs. Other DL Signals> In the Rel.16 NR specification, when the scheduling offset of the aperiodic CSI-RS (A-CSI-RS) is greater than or equal to a threshold determined based on the beam switching timing reported by the UE, the UE may be expected to apply the QCL assumptions in the indicated TCI states for the aperiodic CSI-RS resources in the CSI triggering state indicated by the CSI trigger field in DCI (the UE is expected to apply the QCL assumptions in the indicated TCI states for the aperiodic CSI-RS resources in the CSI triggering state indicated by the CSI trigger field in DCI). That is, in this case, the UE may receive the A-CSI-RS based on the TCI state specified by the DCI.

[0042] Here, the scheduling offset may mean the offset between the last symbol of the PDCCH that transmits the DCI triggering the resource set of the A-CSI-RS (or the last slot containing the PDCCH) and the first symbol (or slot) of the A-CSI-RS resources of the resource set. The unit of the offset may be in symbol units or in slot units. The information on the scheduling offset of the A-CSI-RS may correspond to the RRC parameter "aperiodicTriggeringOffset".

[0043] Also, the beam switching timing (UE capability related) reported by the UE may be referred to as the A-CSI-RS beam switching timing, simply the beam switching timing, the beam switch timing (RRC parameter "beamSwitchTiming"), etc.

[0044] The beam switch timing may take different values ​​for each subcarrier interval (e.g., 60 kHz, 120 kHz). The beam switch timing may take values ​​such as 14, 28, 48, 224, 336 symbols, etc.

[0045] The threshold determined based on the beam switch timing may be the beam switch timing value to be reported, or a specific beam switch timing value (e.g., 48), or a value obtained by adding a predetermined offset (e.g., an offset taking into account the subcarrier spacing) to these.

[0046] If the scheduling offset of the A-CSI-RS is less than a threshold determined based on the beam switch timing reported by the UE, and there is another DL signal with the indicated TCI state in the same symbol as the A-CSI-RS, the UE may apply the QCL assumption for the other DL signal when receiving the A-CSI-RS. This specification is intended to prevent a situation where the UE does not switch the receiving beam in time to receive the A-CSI-RS, because it takes a certain time for the UE to switch the receiving beam corresponding to the TCI state indicated by the triggering DCI after demodulating the triggering DCI.

[0047] In addition, the other DL signal here may be at least one of a PDSCH having a scheduling offset greater than or equal to a predetermined threshold (UE capability information "timeDurationForQCL") (i.e., the offset from reception of DCI to the start of reception of PDSCH scheduled by the DCI is greater than or equal to the predetermined threshold), an A-CSI-RS (i.e., another A-CSI-RS) having a scheduling offset greater than or equal to a threshold determined based on the beam switch timing reported by the UE, a P-CSI-RS, or an SP-CSI-RS.

[0048] The timeDurationForQCL may be defined as the minimum time (eg, the number of OFDM symbols) for a UE to receive a PDCCH and apply the spatial QCL information of the PDCCH (DCI) to PDSCH processing.

[0049] timeDurationForQCL may be referred to as time duration for QCL, "Threshold", "Threshold for offset between a DCI indicating a TCI state and a PDSCH scheduled by the DCI", "Threshold-Sched-Offset", schedule offset threshold, scheduling offset threshold, etc. timeDurationForQCL may take values ​​such as 7, 14, 28 symbols, etc.

[0050] In addition, in the present disclosure, the threshold value for the other DL signal may correspond to the beam switch timing when the other DL signal is A-CSI-RS, and may correspond to the value of timeDurationForQCL reported by the UE when the other DL signal is PDSCH.

[0051] In addition, the application of the above-mentioned QCL assumptions for other DL signals to the A-CSI-RS may be limited to cases where the NZP CSI-RS resource set that specifies the A-CSI-RS resource does not have the higher layer parameters “trs-Info” and “repetition”.

[0052] For an NZP CSI-RS resource set with trs-Info set to true, the antenna ports of all NZP CSI-RS resources in the resource set may be the same. For an NZP CSI-RS resource set with Repetition set to off, the NZP CSI-RS resources in the resource set may not be assumed by the UE to be transmitted with the same downlink spatial domain transmit filter.

[0053] In addition, if the scheduling offset of the A-CSI-RS is less than a threshold determined based on the beam switch timing reported by the UE, there is no other DL signal with the indicated TCI state in the same symbol as the A-CSI-RS, and at least one CORESET is configured in the BWP receiving the A-CSI-RS, the UE may apply the QCL assumption used for the CORESET associated with a monitored search space with the lowest controlResourceSetId in the latest slot in which one or more CORESETs within the active BWP of the serving cell are monitored when receiving the A-CSI-RS.

[0054] In addition, if the scheduling offset of the A-CSI-RS is less than the beam switch timing reported by the UE, there is no other DL signal having the indicated TCI state in the same symbol as the A-CSI-RS, and further, CORESET is not set in the BWP receiving the A-CSI-RS, and a specific higher layer parameter (e.g., an RRC parameter for enabling a default beam (which may be called enableDefaultBeamForCCS, etc.)) is set, the UE may apply a QCL assumption of the TCI state corresponding to the smallest activated TDI state ID applicable to the PDSCH of the active BWP receiving the A-CSI-RS when receiving the A-CSI-RS.

[0055] (Multi-TRP) In the NR, it is considered that one or more transmission / reception points (TRPs) (multi-TRPs (MTRPs)) perform DL transmission to a UE. It is also considered that a UE performs UL transmission to one or more TRPs.

[0056] A UE using MTRP-based control should be able to simultaneously receive multiple beams (multiple QCL type D channels / signals). For such UEs, it is considered possible to relax the above-mentioned constraints (priority rules) on collisions of multiple channels / signals. However, the constraints for the case where a UE can simultaneously receive multiple beams (multiple QCL type D channels / signals) have not yet been studied. If this is not studied, the transmission and reception of the UE may be inappropriately restricted, resulting in a decrease in throughput or deterioration of communication quality.

[0057] Therefore, the present inventors came up with the idea of ​​control that can appropriately deal with collisions between multiple channels / signals.

[0058] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0059] In the present disclosure, "A / B" may mean "at least one of A and B."

[0060] In the present disclosure, the terms activate, deactivate, indicate, select, configure, update, determine, etc. may be read as interchangeable terms.

[0061] In the present disclosure, RRC, RRC parameters, RRC messages, higher layer parameters, information elements (IEs), and configurations may be interchangeable. In the present disclosure, MAC CE, update commands, and activation / deactivation commands may be interchangeable. In the present disclosure, support, control, controllable, operate, and operable may be interchangeable.

[0062] Additionally, in the present disclosure, the terms sequence, list, set, group, and collection may be interpreted interchangeably.

[0063] In the present disclosure, panel, beam, panel group, beam group, Uplink (UL) transmitting entity, TRP, spatial relationship information (SRI), spatial relationship, control resource set (COntrol REsource SET (CORESET)), Physical Downlink Shared Channel (PDSCH), codeword, base station, a specific antenna port (e.g., a DeModulation Reference Signal (DMRS) port), a specific antenna port group (e.g., a DMRS port group), a specific group (e.g., a Code Division Multiplexing (CDM) group, a specific reference signal group, a CORESET group), a specific resource (e.g., a specific reference signal resource), a specific resource set (e.g., a specific reference signal resource set), a CORESET pool, a PUCCH group (PUCCH resource group), spatial relationship group, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, etc. may be read as interchangeable.

[0064] The panel may be associated with at least one of a group index of an SSB / CSI-RS group, a group index of a group-based beam report, and a group index of an SSB / CSI-RS group for group-based beam reporting.

[0065] In addition, a panel identifier (ID) and a panel may be interchangeable. That is, a TRP ID and a TRP, a CORESET group ID and a CORESET group, etc. may be interchangeable.

[0066] In this disclosure, the terms index, ID, indicator, and resource ID may be interchangeable. In this disclosure, the terms sequence, list, set, group, cluster, and subset may be interchangeable.

[0067] In the present disclosure, a UE configured with multiple TRPs may determine at least one of the TRP corresponding to a DCI, the TRP corresponding to a PDSCH or UL transmission (PUCCH, PUSCH, SRS, etc.) scheduled by the DCI, etc., based on at least one of the following: -Values ​​of certain fields included in DCI (e.g., field specifying TRP, antenna port field, PRI). DMRS corresponding to the scheduled PDSCH / PUSCH (e.g., the sequence, resource, CDM group, DMRS port, DMRS port group, antenna port group, etc. of the DMRS). The DMRS corresponding to the PDCCH on which the DCI is transmitted (e.g., the sequence, resource, CDM group, DMRS port, DMRS port group, etc. of the DMRS). The CORESET that received the DCI (for example, the CORESET pool ID of the CORESET, the ID of the CORESET, the scramble ID (which may be replaced with the series ID), resources, etc.). RS (e.g., RS related groups) used for TCI states, QCL assumptions, spatial relationship information, etc.

[0068] In the present disclosure, a single PDCCH (DCI) may be referred to as a PDCCH (DCI) of a first scheduling type (e.g., scheduling type A (or type 1)), and a multi-PDCCH (DCI) may be referred to as a PDCCH (DCI) of a second scheduling type (e.g., scheduling type B (or type 2)).

[0069] In this disclosure, for a single DCI, the ith TRP (TRP#i) may refer to the ith TCI state, the ith CDM group, etc. (i is an integer). For a multi-DCI, the ith TRP (TRP#i) may refer to the CORESET corresponding to CORESET pool index=i, the ith TCI state, the ith CDM group, etc. (i is an integer).

[0070] In this disclosure, a single PDCCH may be assumed to be supported when multiple TRPs use an ideal backhaul, and multiple PDCCHs may be assumed to be supported when multiple TRPs use a non-ideal backhaul.

[0071] In addition, the ideal backhaul may be called DMRS port group type 1, reference signal associated group type 1, antenna port group type 1, CORESET pool type 1, etc. The non-ideal backhaul may be called DMRS port group type 2, reference signal associated group type 2, antenna port group type 2, CORESET pool type 2, etc. The names are not limited to these.

[0072] In the present disclosure, multi-TRP, multi-TRP system, multi-TRP transmission, and multi-PDSCH may be read as interchangeable.

[0073] In the present disclosure, single DCI (sDCI), single PDCCH, multi-TRP system based on single DCI, sDCI-based MTRP, and activating two TCI states on at least one TCI codepoint may be read as interchangeable.

[0074] In the present disclosure, multi-DCI (mDCI), multi-PDCCH, multi-TRP system based on multi-DCI, mDCI-based MTRP, and setting two CORESET pool indices or CORESET pool index=1 (or a value greater than or equal to 1) may be read as interchangeable.

[0075] The QCL of the present disclosure may be interchangeably read as QCL type D.

[0076] Note that the following embodiments are described assuming that they are applied when the UE supports simultaneous reception of two or more different QCL type D channels / signals, but may also be applied in other cases.

[0077] (Wireless communication method) <First embodiment> The first embodiment relates to collision of PDCCH and PDSCH. The PDCCH and PDSCH in the description of the first embodiment may mean PDCCH and PDSCH that overlap each other in time.

[0078] The case of mDCI-based MTRP (embodiment 1.1) and the case of sDCI-based MTRP (embodiment 1.2) will be described respectively.

[0079] [Embodiment 1.1] For mDCI-based MTRP, the priority rules shown in FIG. 1 may be applied only if the PDCCH and PDSCH relate to the same CORESET pool index, if a CORESET pool index is configured for CORESET.

[0080] If the PDCCH and PDSCH relate to different CORESET pool indices, no priority rules are required and a UE capable of simultaneous reception of two different QCL type D channels / signals may receive both the PDCCH and PDSCH relating to these different QCL type D channels / signals.

[0081] In addition, the UE may determine the association between the CORESET pool index and the PDSCH based on the relationship between the CORESET pool index and the PDCCH that schedules the PDSCH, or based on the relationship between the CORESET pool index and the PDCCH that the PDSCH uses as a reference for the QCL (e.g., references as a default QCL).

[0082] For example, the UE may determine that the CORESET pool index related to a PDSCH is the CORESET pool index related to the PDCCH that schedules the PDSCH, or may determine that the CORESET pool index related to the PDCCH that is referenced as a default QCL for the PDSCH.

[0083] FIG. 2 is a diagram showing an example of an environment of mDCI-based MTRP for explaining the operation of embodiment 1.1. In this example, the UE uses mDCI-based MTRP using TRP1 and TRP2. TRP1 corresponds to CORESET pool index=0, and TRP2 corresponds to CORESET pool index=1. TRP1 transmits PDCCH1 and PDSCH1 to the UE. TRP2 transmits PDCCH2 and PDSCH2 to the UE.

[0084] In addition, PDCCH1 is not limited to PDCCH (DCI) for scheduling PDSCH1, and may mean any PDCCH transmitted from TRP1. In addition, PDCCH2 is not limited to PDCCH (DCI) for scheduling PDSCH2, and may mean any PDCCH transmitted from TRP2.

[0085] 3A and 3B are diagrams showing an example of priority rules when PDCCH and PDSCH collide according to embodiment 1.1. As shown in FIG. 2, PDCCH1 and PDSCH1 correspond to TRP1 (CORESET pool index=0), and PDCCH2 and PDSCH2 correspond to TRP2 (CORESET pool index=1). In addition, PDSCH1 or PDSCH2 in this example follows the default TCI state.

[0086] In Fig. 3A, for PDCCH1 and PDSCH1 corresponding to the same CORESET pool index, the QCL type D is different and some symbols overlap. In this case, the UE receives PDCCH1 preferentially and does not need to receive PDSCH1 (shown in black in the figure) that overlaps with PDCCH1. The UE may receive the part of PDSCH1 that does not overlap with PDCCH1.

[0087] In Fig. 3B, PDCCH1 and PDSCH2 corresponding to different CORESET pool indexes have different QCL types D and some symbols overlap. In this case, the UE may receive PDSCH2 overlapping with PDCCH1 at the same time as PDCCH1.

[0088] [Embodiment 1.2] For sDCI-based MTRP, if multiple (e.g., two) TCI states apply for a PDSCH (e.g., as indicated by a DCI or by a default QCL) and a QCL type D channel / signal of a DMRS of a PDCCH is the same as a QCL type D channel / signal of one of the multiple TCI states for the DMRS of the PDSCH, no priority rule is required and a UE capable of simultaneous reception of two different QCL type D channels / signals may receive both the PDCCH and PDSCH for these different QCL type D channels / signals.

[0089] If multiple TCI states apply for the PDSCH, and if the QCL type D channel / signal of the DMRS of the PDCCH is different from the QCL type D channel / signal of any of the multiple TCI states for the DMRS of the PDSCH, the UE may follow at least one of the following: (1) Prioritizing reception of a PDCCH and not receiving a PDSCH in a symbol that overlaps with the PDCCH; (2) Prioritizing reception of a PDCCH and a PDSCH associated with one of the plurality of TCI states, and not receiving PDSCHs associated with the remaining TCI states in symbols that overlap with the PDCCH.

[0090] The prioritized TCI state for the PDSCH in (2) above may be specified in advance by a specification, may be configured / activated in the UE by higher layer signaling (e.g., RRC, MAC CE), or may be determined based on UE capabilities. The prioritized TCI state for the PDSCH in (2) above may be a TCI state whose TCI state ID corresponds to a specific value (e.g., a minimum value, a maximum value) among the multiple TCI states.

[0091] 4 is a diagram showing an example of an environment of sDCI-based MTRP for explaining the operation of embodiment 1.2. In this example, the UE uses sDCI-based MTRP using TRP1 and TRP2. TRP1 transmits PDCCH and PDSCH to the UE. TRP2 transmits PDSCH (scheduled by PDCCH from TRP1) to the UE.

[0092] Note that PDCCH1 is not limited to a PDCCH (DCI) for scheduling PDSCH1, and may refer to any PDCCH transmitted from TRP1.

[0093] When the TCI codepoint of the DCI carried by the PDCCH indicates a set of two or more TCI states, the UE receives PDSCHs corresponding to different TCI states (e.g., transmitted from different TRPs) as shown in the figure. In this example, it is assumed that the PDSCH from TRP1 corresponds to TCI state 1, and the PDSCH from TRP2 corresponds to TCI state 2.

[0094] 5A and 5B are diagrams showing an example of priority rules when PDCCH and PDSCH collide according to embodiment 1.2. As shown in FIG. 4, PDCCH and PDSCH1 corresponding to TCI state 1 correspond to TRP1, and PDSCH corresponding to TCI state 2 corresponds to TRP2. It is assumed that the QCL type D of the PDCCH is different from the QCL type D of any PDSCH (QCL type D in TCI states 1 and 2). In addition, the PDSCH in this example may or may not follow the default TCI state.

[0095] In Fig. 5A, the QCL type D is different for both the PDSCH corresponding to TCI state 1 and the PDSCH2 corresponding to TCI state 2, and some symbols overlap. In this case, the UE receives the PDCCH with priority, and does not need to receive each PDSCH (shown in black in the figure) that overlaps with the PDCCH. The UE may receive each PDSCH that does not overlap with the PDCCH.

[0096] 5B, the QCL type D of the PDCCH is different for both the PDSCH corresponding to TCI state 1 and the PDSCH2 corresponding to TCI state 2, and some symbols overlap. In this example, it is assumed that the TCI state of the prioritized PDSCH is the TCI state having the maximum TCI state ID value among multiple TCI states specified for the PDSCH.

[0097] In this case, the UE may preferentially receive the PDCCH and the PDSCH corresponding to TCI state 2, and may not receive the PDSCH (shown in black in the figure) that overlaps with the PDCCH and corresponds to TCI state 1. The UE may receive each PDSCH that does not overlap with the PDCCH.

[0098] According to the first embodiment described above, it is possible to appropriately deal with collisions between PDCCH and PDSCH.

[0099] <Second embodiment> The second embodiment relates to a collision between CSI-RS and PDCCH (CORESET). The CSI-RS and PDCCH in the description of the second embodiment may refer to CSI-RS and PDCCH that overlap each other in time. The PDCCH in the present disclosure may be read as CORESET.

[0100] The case of mDCI-based MTRP (embodiment 2.1) and the case of sDCI-based MTRP (embodiment 2.2) will be described respectively.

[0101] [Embodiment 2.1] For mDCI-based MTRP, if a CORESET pool index is configured for the CORESET, it may be supported to configure the relationship between the CSI-RS resource or NZP-CSI-RS resource set and the CORESET pool index directly (explicit) or indirectly (implicit).

[0102] For CSI-RS resources associated with an NZP-CSI-RS resource set with the higher layer parameter 'repetition' set to 'on', the UE may not assume that a CSI-RS resource associated with the same CORESET pool index is configured for a symbol configured to monitor a CORESET associated with a certain CORESET pool index. The CSI-RS resource may be located in overlapping symbols with a CORESET associated with a different CORESET pool index.

[0103] For a CSI-RS associated with an NZP-CSI-RS resource set where the higher layer parameter for repetition ('repetition') is on ('on'), the UE may simultaneously receive the CSI-RS and PDCCH associated with different CORESET pool indices.

[0104] On the other hand, for an NZP-CSI-RS resource set where 'repetition' is not 'on', the UE may assume that the CSI-RS and the DMRS of PDCCH transmitted in all search space sets associated with the CORESET are QCLs with "QCL type D" if the CSI-RS and CORESET are associated with the same CORESET pool index. If the CSI-RS and CORESET are associated with different CORESET pool indexes, the CSI-RS and the DMRS of PDCCH for the CORESET may be allowed to correspond to different "QCL types D".

[0105] [Embodiment 2.2] For sDCI-based MTRP, the existing priority rules of Rel. 16 mentioned above may apply, as in the case of a single TRP.

[0106] In addition, if a UE supports simultaneous reception of a total of X QCLs (channels / signals), and if the total number of different QCLs for CSI-RS and PDCCH in the same OFDM symbol is equal to or less than X, the UE may receive all of the CSI-RS and PDCCH, otherwise, the UE may not receive all of the CSI-RS and PDCCH. If not, the UE may drop (not receive) at least one of a part of the CSI-RS and a part of the PDCCH so that the transmission of different QCLs is equal to or less than X.

[0107] A UE supporting simultaneous reception of a total of X QCLs (channels / signals) may expect the total number of different QCLs for CSI-RS and PDCCH in the same OFDM symbol to not exceed X.

[0108] The UE may receive all of the CSI-RS and PDCCH for different QCLs in the same OFDM symbol if they belong to the same group for a first group-based beam report, where the first group-based beam report may be defined by beams of the same group being simultaneously received by the UE. The first group-based beam report may be a group-based beam report for Rel.16 / 17.

[0109] The UE may assume that for CSI-RS and PDCCH belonging to different groups for the first group-based beam report, the existing priority rules of Rel. 16 mentioned above apply.

[0110] The UE may receive all of the CSI-RS and PDCCH for different QCLs in the same OFDM symbol if the CSI-RS and PDCCH belong to different groups for a second group-based beam report, where the second group-based beam report may be defined by beams of different groups being simultaneously received by the UE. The second group-based beam report may be a group-based beam report for Rel. 17.

[0111] The UE may assume that for CSI-RS and PDCCH belonging to the same group for the second group-based beam report, the existing priority rules of Rel. 16 mentioned above apply.

[0112] According to the second embodiment described above, it is possible to appropriately deal with collisions between CSI-RS and PDCCH.

[0113] <Third embodiment> The third embodiment relates to collision of CSI-RS and SSB. The CSI-RS and SSB in the description of the third embodiment may mean CSI-RS and SSB that overlap each other in time.

[0114] The case of mDCI-based MTRP (embodiment 3.1) and the case of sDCI-based MTRP (embodiment 3.2) will be described.

[0115] [Embodiment 3.1] For mDCI-based MTRP, when a CORESET pool index is configured for CORESET, it may be supported to configure the relationship between the CSI-RS resource or NZP-CSI-RS resource set and the CORESET pool index directly (explicit) or indirectly (implicit), and it may be supported to configure the relationship between the SSB and the CORESET pool index directly (explicit) or indirectly (implicit).

[0116] If a CSI-RS resource is configured in the same OFDM symbol as an SSB and the CSI-RS and the SSB are associated with the same CORESET pool index, the UE may assume that the CSI-RS and the SSB are QCLs with "QCL type D".

[0117] In addition, when a CSI-RS resource is configured in the same OFDM symbol as an SSB, and the CSI-RS and the SSB are associated with different CORESET pool indices, the UE may assume that the CSI-RS and the SSB have restrictions on QCL type D (e.g., the CSI-RS and the SSB may be allowed to correspond to different "QCL types D").

[0118] In this disclosure, indirectly setting a relationship between a certain channel / signal and a CORESET pool index may mean, for example, derivation of a relationship based on a QCL assumption or a TCI state. For example, when CORESET#2 corresponding to CORESET pool index#1 is set to TCI state#3, the fact that SSB#4 is a source reference signal (reference reference signal) of TCI state#3 implicitly means that SSB#4 is related to CORESET pool index#1.

[0119] [Embodiment 3.2] For sDCI-based MTRP, the existing priority rules of Rel. 16 mentioned above may apply, as in the case of a single TRP.

[0120] For the sDCI-based MTRP, the content in embodiment 2.2 in which "PDCCH" is replaced with "SSB" may be used. For example, if a UE supports simultaneous reception of a total of X QCLs (channels / signals), and if the total number of different QCLs for CSI-RS and SSB in the same OFDM symbol is equal to or less than X, the UE may receive all of the CSI-RS and SSB, and otherwise, the UE may not receive all of the CSI-RS and SSB.

[0121] According to the third embodiment described above, it is possible to appropriately deal with collision between CSI-RS and SSB.

[0122] <Fourth embodiment> The fourth embodiment relates to collision of PDSCH and SSB. The PDSCH and SSB in the description of the fourth embodiment may mean PDSCH and SSB that overlap each other in time. In the fourth embodiment, the PDSCH may be read as a DMRS for the PDSCH.

[0123] The case of mDCI-based MTRP (embodiment 4.1) and the case of sDCI-based MTRP (embodiment 4.2) will be described.

[0124] [Embodiment 4.1] For mDCI-based MTRP, if a CORESET pool index is configured for the CORESET, it may be supported to configure the relationship between the SSB and the CORESET pool index directly (explicit) or indirectly (implicit).

[0125] If the UE receives a DMRS for a PDSCH in the same OFDM symbol as an SSB, and the PDSCH and the SSB are associated with the same CORESET pool index, the UE may assume that the PDSCH and the SSB are QCLs with "QCL type D".

[0126] In addition, if the UE receives a DMRS for a PDSCH in the same OFDM symbol as an SSB, the UE may receive both the PDSCH and the SSB for these different QCL type D channels / signals if the PDSCH and the SSB are associated with different CORESET pool indices.

[0127] The relationship between the CORESET pool index and the PDSCH may be determined in the same manner as in embodiment 1.1.

[0128] [Embodiment 4.2] For sDCI-based MTRP, if multiple (e.g., two) TCI states apply for a PDSCH (e.g., as indicated by DCI or by a default QCL) and the UE receives DMRS and SSB for a PDSCH in the same OFDM symbol, the channel / signal of QCL type D in one of the multiple TCI states for the PDSCH may be assumed to be QCL with SSB and “QCL ​​type D”.

[0129] In other words, the UE may prioritize reception of an SSB and a PDSCH associated with one TCI state among the plurality of TCI states, and the UE may not receive PDSCH associated with the remaining TCI states among the plurality of TCI states in symbols that overlap with the SSB. The prioritized TCI state for the PDSCH may be a TCI state among the plurality of TCI states whose TCI state ID corresponds to a particular value (e.g., a minimum value, a maximum value).

[0130] According to the fourth embodiment described above, it is possible to appropriately deal with collisions between PDSCH and SSB.

[0131] <Fifth embodiment> The fifth embodiment relates to collision of A-CSI-RS and other DL signals. In the description of the fifth embodiment, the A-CSI-RS and other DL signals may mean A-CSI-RS and other DL signals that overlap each other in time.

[0132] The A-CSI-RS in the fifth embodiment corresponds to an A-CSI-RS whose scheduling offset is smaller than a threshold determined based on the beam switch timing reported by the UE. Also, the other DL signal in the fifth embodiment corresponds to "the other DL signal" defined in the existing Rel.15 / 16. Also, the PDSCH in the fifth embodiment indicates the PDSCH corresponding to the other DL signal.

[0133] The case of mDCI-based MTRP (embodiment 5.1) and the case of sDCI-based MTRP (embodiment 5.2) will be described.

[0134] [Embodiment 5.1] For mDCI-based MTRP, if a CORESET pool index is configured for the CORESET, it may be supported to configure the relationship between A-CSI-RS resources or A-CSI-RS resource sets and the CORESET pool index directly (explicit) or indirectly (implicit).

[0135] The UE may prioritize the QCL for the other DL signal (e.g., apply the QCL for the other DL signal to reception of the A-CSI-RS) if the A-CSI-RS and the other DL signal are associated with the same CORESET pool index, and may otherwise receive both the A-CSI-RS and the other DL signal with different QCL type D.

[0136] The relationship between the CORESET pool index and the PDSCH may be determined in the same manner as in embodiment 1.1.

[0137] [Embodiment 5.2] For sDCI-based MTRP, if multiple (e.g., two) TCI states apply for the PDSCH (e.g., as indicated by the DCI or by the default QCL) and the UE receives DMRS and A-CSI-RS for the PDSCH in the same OFDM symbol, the UE may follow at least one of the following: If the QCL type D of the A-CSI-RS is the same as one of the multiple TCI states, receive both the A-CSI-RS and the PDSCH; If the QCL type D of the A-CSI-RS is different from any of the plurality of TCI states, the QCL assumption of the specific TCI state is applied to the reception of the A-CSI-RS and the PDSCH, and the QCL assumption of the remaining TCI states of the plurality of TCI states is applied to the reception of the remaining PDSCH. The specific TCI state may be a TCI state of the plurality of TCI states whose TCI state ID corresponds to a specific value (e.g., a minimum value, a maximum value).

[0138] Also, for the sDCI-based MTRP, the contents in embodiment 2.2 in which "CSI-RS" is read as "A-CSI-RS" and "PDCCH" is read as "other DL signals" may be used. For example, if a UE supports simultaneous reception of a total of X QCLs (channels / signals), and if the total number of different QCLs for the A-CSI-RS and other DL signals in the same OFDM symbol is equal to or less than X, the UE may receive the A-CSI-RS and all of the other DL signals, and otherwise the UE may not receive the A-CSI-RS and all of the other DL signals.

[0139] 6 is a diagram showing an example of a priority rule when the A-CSI-RS and another DL signal (PDSCH) collide according to embodiment 5.2. In this example, the A-CSI-RS has different QCL types D for both the PDSCH corresponding to TCI state 1 and the PDSCH2 corresponding to TCI state 2, and some symbols overlap. It is assumed that the QCL type D of the A-CSI-RS is different from the QCL type D of any PDSCH (QCL type D in TCI states 1 and 2). In addition, the PDSCH in this example may or may not follow the default TCI state.

[0140] In this example, it is assumed that the specific TCI state (TCI state of the prioritized PDSCH) is the TCI state whose TCI state ID has the smallest value among multiple TCI states specified for the PDSCH that overlaps with the A-CSI-RS.

[0141] In this case, the UE applies TCI state 1 for receiving the A-CSI-RS and the PDSCH in the symbols where the A-CSI-RS and the PDSCH overlap, and also applies TCI state 2 for receiving the PDSCH.

[0142] In this example, TCI state 1 is not applied to the A-CSI-RS that does not overlap with the PDSCH, but it may be applied.

[0143] According to the fifth embodiment described above, it is possible to appropriately handle collisions between the A-CSI-RS and other DL signals.

[0144] <Other> In the above-described embodiment, an example was described in which, when a CORESET pool index is set to CORESET, the same QCL-D is assumed in the UE for different channels / RS related to the same CORESET pool index, and different QCL-Ds are assumed in the UE for different channels / RS related to different CORESET pool indexes.

[0145] In the above-described embodiment, an example has been described in which, when multiple TCI states are applied to a PDSCH, if one of the multiple TCI states and another DL channel / signal correspond to the same QCL-D, the UE receives both the PDSCH and the other DL channel / signal, and if not, prioritizes one of the TCI states.

[0146] It should be noted that at least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.

[0147] The specific UE capabilities may indicate at least one of the following: -Whether or not simultaneous reception is supported; Whether or not it supports simultaneous reception of two or more different QCL type-D channels / signals; · Number of QCLs for simultaneous reception in one OFDM symbol.

[0148] The capability of supporting simultaneous reception may be defined separately for each of the above-mentioned embodiments, or may be defined in common to several embodiments. For example, a capability indicating support for simultaneous reception of any two of PDCCH, PDSCH, CSI-RS, SSB, and A-CSI-RS (which may be the same channel / signal) may be defined. Also, for example, a capability indicating support for simultaneous reception of PDSCH may indicate support for the process related to simultaneous reception described in the first embodiment (collision of PDCCH and PDSCH) and the fourth embodiment (collision of PDSCH and SSB).

[0149] The capacity of the number of QCLs for simultaneous reception in one OFDM symbol may be defined per Bandwidth Part (BWP) / per CC (component carrier) / per band, or over all CCs or over all bands. When defined over all CCs / all bands, the above-mentioned "one OFDM symbol" may be defined with a specific subcarrier spacing (SCS) in mind. The specific SCS may be, for example, a smaller (or larger) SCS among the SCSs available (or set) in all CCs / all bands, and may be, for example, 15 kHz.

[0150] In addition, the terms "CSI-RS," "A-CSI-RS," "SSB," etc. in this disclosure may be interpreted as Radio Link Monitoring RS (RLM-RS), Beam Failure Detection RS (BFD-RS), RS for beam management, etc.

[0151] Also, at least one of the above-described embodiments may be applied when the UE is configured with specific information related to the above-described embodiments by higher layer signaling (if not configured, for example, the operation of Rel. 15 / 16 is applied). For example, the specific information may be information indicating enabling different spatial relationships for PUSCH repetition, any RRC parameters for a specific release (e.g., Rel. 17), etc.

[0152] Each of the above-described embodiments may be applied when (the operation of) multi-TRP or multi-panel is set in the UE, or may be applied when not.

[0153] (Wireless communication system) A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination of these methods.

[0154] 7 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0155] Furthermore, the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0156] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN) and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN and the LTE (E-UTRA) base station (eNB) is the SN.

[0157] The wireless communication system 1 may support dual connectivity between multiple base stations in the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0158] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as a base station 10.

[0159] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0160] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

[0161] 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).

[0162] The multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0163] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0164] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0165] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

[0166] The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0167] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as a downlink channel.

[0168] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0169] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0170] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information of at least one of the PDSCH and the PUSCH.

[0171] In addition, DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

[0172] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0173] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in the present disclosure may be read as interchangeable terms.

[0174] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0175] In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels.

[0176] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0177] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal.

[0178] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal).

[0179] (base station) 8 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

[0180] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0181] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0182] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0183] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0184] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0185] The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0186] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0187] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0188] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0189] The transceiver 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0190] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna .

[0191] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna .

[0192] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0193] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0194] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, etc.

[0195] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0196] The transceiver 120 may transmit to the user terminal 20 at least one of an overlapping downlink shared channel (Physical Downlink Shared Channel (PDSCH)) and a downlink control channel (Physical Downlink Control Channel (PDCCH)).

[0197] It may be assumed that the control unit 110 performs control so that the user terminal 20 receives both the PDSCH and the PDCCH when a specific condition is satisfied.

[0198] Furthermore, the transceiver 120 may transmit a downlink control channel (Physical Downlink Control Channel (PDCCH)) to the user terminal 20 in a control resource set (CORESET).

[0199] The control unit 110 may perform control under the assumption that the user terminal 20 does not assume that CSI-RS resources related to a Non Zero Power Channel State Information Reference Signal (NZP-CSI-RS) resource set in which a higher layer parameter related to repetition is on and related to a CORESET pool index that is the same as the CORESET pool index of the CORESET are configured for symbols configured to monitor the CORESET.

[0200] Furthermore, the transceiver 120 may transmit an aperiodic channel state information reference signal (A-CSI-RS) to the user terminal 20.

[0201] The control unit 110 may assume that, in the user terminal 20, if the scheduling offset between the reception of a downlink control channel transmitting downlink control information scheduling the A-CSI-RS and the reception of the A-CSI-RS is smaller than a threshold determined based on the value of the period for beam switching reported by the user terminal 20, and if there is another downlink signal in the same symbol as the A-CSI-RS, and the A-CSI-RS and the other downlink signal are related to the same Control Resource Set (CORESET) pool index, the user terminal 20 prioritizes Quasi-Co-Location (QCL) for the other downlink signal.

[0202] (User terminal) 9 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0203] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0204] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0205] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission / reception unit 220.

[0206] The transmitting / receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting / receiving unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting / receiving circuit, and the like, which are described based on common understanding in the technical field related to the present disclosure.

[0207] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0208] The transmitting / receiving antenna 230 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

[0209] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0210] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0211] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0212] The transceiver 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit sequence to be transmitted, and output a baseband signal.

[0213] Whether or not to apply the DFT process may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver 220 (transmission processor 2211) may perform the DFT process as the transmission process to transmit the channel using a DFT-s-OFDM waveform, and may not perform the DFT process as the transmission process if transform precoding is enabled for the channel.

[0214] The transceiver unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 230.

[0215] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna 230.

[0216] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0217] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0218] In addition, the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0219] Note that, when a specific condition is satisfied, the control unit 210 may perform control to receive both an overlapping downlink shared channel (Physical Downlink Shared Channel (PDSCH)) and a downlink control channel (Physical Downlink Control Channel (PDCCH)).

[0220] The transceiver unit 220 may prioritize reception of the PDCCH when the specific condition is not satisfied.

[0221] Here, the specific condition may be that a Quasi-Co-Location (QCL) type D of a Demodulation Reference Signal (DMRS) of the PDSCH is different from a QCL type D of a DMRS of the PDCCH, and the PDSCH and the PDCCH relate to different Control Resource Set (CORESET) pool indices.

[0222] The particular condition may be that a plurality of Transmission Configuration Indication states (TCI states) are applied for the PDSCH, and that a Quasi-Co-Location (QCL) type D of a DeModulation Reference Signal (DMRS) of the PDCCH is the same as a QCL type D of one of the plurality of TCI states.

[0223] When the specific condition is not satisfied, the transceiver unit 220 may prioritize reception of the PDCCH and the PDSCH associated with one TCI state of the plurality of TCI states.

[0224] The transceiver 220 may monitor a physical downlink control channel (PDCCH) in a control resource set (CORESET).

[0225] The control unit 210 may not assume that a CSI-RS resource associated with a Non Zero Power Channel State Information Reference Signal (NZP-CSI-RS) resource set in which the upper layer parameter for repetition is on and related to a CORESET pool index that is the same as the CORESET pool index of the CORESET is configured for a symbol configured to monitor the CORESET.

[0226] The control unit 210 may assume that for a CSI-RS resource associated with an NZP-CSI-RS resource set in which the upper layer parameter for the repetition is off and related to a CORESET pool index that is the same as the CORESET pool index of the CORESET, the CSI-RS resource and a demodulation reference signal (DMRS) for a PDCCH transmitted in all search space sets associated with the CORESET are Quasi-Co-Location (QCL) type D and QCL.

[0227] The control unit 210 may receive all of the CSI-RS and PDCCH in the same symbol if the CSI-RS and PDCCH correspond to different quasi-co-locations (QCLs) and belong to the same group for the first group-based beam report.

[0228] The control unit 210 may receive all of the CSI-RS and PDCCH when the PDCCH and CSI-RS in the same symbol correspond to different quasi-co-locations (QCL) and belong to different groups for the second group-based beam report.

[0229] In addition, when a scheduling offset between reception of a downlink control channel transmitting downlink control information that schedules an Aperiodic Channel State Information-Reference Signal (A-CSI-RS) and reception of the A-CSI-RS is smaller than a threshold determined based on the reported value of the period for beam switching, and when there is another downlink signal in the same symbol as the A-CSI-RS, and the A-CSI-RS and the other downlink signal are related to the same Control Resource Set (CORESET) pool index, the control unit 210 may prioritize Quasi-Co-Location (QCL) for the other downlink signal.

[0230] The transceiver 220 may receive the A-CSI-RS.

[0231] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0232] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, and the like. In either case, as described above, the method of realization is not particularly limited.

[0233] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 10 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0234] In this disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0235] For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processes may be performed by one processor, or the processes may be performed by two or more processors simultaneously, sequentially, or in other manners. Also, the processor 1001 may be implemented by one or more chips.

[0236] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0237] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0238] Moreover, the processor 1001 reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks may be realized in a similar manner.

[0239] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory (primary storage device), and the like. The memory 1002 can store a program (program code), a software module, and the like that is executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0240] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0241] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0242] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0243] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0244] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0245] (Modification) In addition, the terms explained in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be read as mutually interchangeable. A signal may also be a message. A reference signal may also be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, etc.

[0246] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0247] Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0248] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology.

[0249] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0250] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A different name may be used for the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be read as interchangeable with each other.

[0251] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0252] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0253] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0254] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0255] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0256] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0257] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0258] In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0259] In addition, one or more RBs may be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0260] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0261] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0262] The BWP may include a UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0263] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given channel / signal outside the active BWP. Note that the terms "cell", "carrier", etc. in this disclosure may be replaced with "BWP".

[0264] The above-mentioned structures of radio frames, subframes, slots, minislots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

[0265] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0266] The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0267] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0268] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via a plurality of network nodes.

[0269] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0270] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0271] The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, by using a MAC Control Element (CE).

[0272] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0273] The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or by comparing numerical values ​​(e.g., with a predetermined value).

[0274] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0275] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0276] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0277] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," and the like may be used interchangeably.

[0278] In this disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0279] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0280] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0281] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0282] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0283] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0284] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0285] In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. It is clear that in a network including one or more network nodes having base stations, various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0286] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be reordered unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0287] Each aspect / embodiment described in the present disclosure may be implemented using any of a wide variety of standards, including Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems using 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other appropriate wireless communication methods, next-generation systems that are based on these, etc. Also, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0288] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0289] Any reference to an element using a designation such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

[0290] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, and the like.

[0291] A "determining" may also be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

[0292] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "deciding" to perform some action.

[0293] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0294] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0295] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

[0296] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0297] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0298] In this disclosure, where articles have been added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0299] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure.

Claims

1. A transmitter that transmits capability information indicating that it supports simultaneous reception of quasi-collocation (QCL) type signals for different spatial reception parameters; A control unit that controls reception of a physical downlink shared channel (PDSCH) and a synchronization signal / physical broadcast channel (SS / PBCH) block; A receiving unit for receiving the PDSCH and the SS / PBCH block, The control unit, when the transmission unit transmits the capability information, two control resource set (CORESET) pool indexes are set, and the demodulation reference signal (DMRS) for the PDSCH and the SS / PBCH block are received in the same symbol, assumes that the DMRS for the PDSCH and the SS / PBCH block are QCL in a QCL type for spatial reception parameters. A terminal.

2. 2. The terminal of claim 1, wherein when two TCI states are indicated by at least one transmission configuration indication (TCI) code point and a DMRS for the PDSCH and the SS / PBCH block are received in the same symbol, the control unit assumes that a QCL type signal for spatial reception parameters of one of the two TCI states is QCL for the QCL type for the SS / PBCH block and spatial reception parameters.

3. 2. The terminal of claim 1, wherein the control unit assumes that when the transmission unit transmits the capability information, two TCI states are indicated by at least one transmission configuration indication (TCI) code point, and a DMRS for the PDSCH and the SS / PBCH block are received in the same symbol, a signal of a QCL type for spatial reception parameters of one of the two TCI states is QCL for the QCL type for the SS / PBCH block and spatial reception parameters.

4. A step of transmitting capability information indicating support for simultaneous reception of quasi-collocation (QCL) type signals for different spatial reception parameters; controlling reception of a physical downlink shared channel (PDSCH) and a synchronization signal / physical broadcast channel (SS / PBCH) block; receiving the PDSCH and the SS / PBCH block; and assuming that a demodulation reference signal (DMRS) for the PDSCH and the SS / PBCH block are QCL in a QCL type for spatial reception parameters when the capability information is transmitted, two control resource set (CORESET) pool indexes are set, and the DMRS for the PDSCH and the SS / PBCH block are received in the same symbol.

5. A system including a terminal and a base station, The terminal includes: a transmitter unit transmitting capability information indicating that the transmitter unit supports simultaneous reception of Quasi-Collocation (QCL) type signals for different spatial reception parameters; A control unit that controls reception of a physical downlink shared channel (PDSCH) and a synchronization signal / physical broadcast channel (SS / PBCH) block; A receiving unit for receiving the PDSCH and the SS / PBCH block, The control unit assumes that the DMRS for the PDSCH and the SS / PBCH block are QCL in a QCL type for spatial reception parameters when the transmission unit transmits the capability information, two control resource set (CORESET) pool indexes are set, and the demodulation reference signal (DMRS) for the PDSCH and the SS / PBCH block are received in the same symbol; The base station, A system comprising a transmitter for transmitting the PDSCH and the SS / PBCH block.

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