Terminal, wireless communication method, and base station

Abstract

A terminal according to an aspect of the present disclosure includes: a receiving unit that receives a first media access control - control element (MAC CE), which is a first MAC CE indicating one or more first transmission configuration indication (TCI) states activated for a physical downlink shared channel (PDSCH), and receives a second MAC CE indicating one or more second TCI states activated for a physical uplink shared channel (PUSCH); and a control unit that applies the one or more second TCI states indicated by the second MAC CE to the PUSCH. According to an aspect of the present disclosure, beams can be appropriately notified.

Description

Technical Field

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

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

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

[0004] Prior Art Documents

[0005] Non-Patent Documents

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

[0007] Problems to be Solved by the Invention

[0008] In a future wireless communication system (e.g., NR), a user terminal (terminal, user terminal, User Equipment (UE)) uses beams (Transmission Configuration Indicator (TCI) state / Quasi-Co-Location (QCL) assumption) to control transmission and reception.

[0009] However, there are concerns that the delay / overhead in the indication of beams for the downlink (DL) / uplink (UL) may degrade the communication quality / throughput.

[0010] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately notify beams.

[0011] Means for Solving the Problem

[0012] A terminal according to one embodiment of the present disclosure includes: a receiving unit that receives a first Media Access Control - Control Element (MAC CE), which is a first MAC CE indicating one or more first Transmission Configuration Indicator (TCI) states activated for a Physical Downlink Shared Channel (PDSCH), and receives a second MAC CE indicating one or more second TCI states activated for a Physical Uplink Shared Channel (PUSCH); and a control unit that applies the one or more second TCI states indicated by the second MAC CE to the PUSCH.

[0013] Advantageous Effects of the Invention

[0014] According to one embodiment of the present disclosure, beams can be appropriately notified. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is an example showing activation / deactivation of a MAC CE for a UE-specific PDSCH TCI state.

[0016] Figure 2 FIG. is an example showing activation / deactivation of a MAC CE for an extended TCI state for a UE-specific PDSCH.

[0017] Figure 3A And Figure 3B FIG. is an example of a MAC CE showing notification method 1-1.

[0018] Figure 4A And Figure 4B FIG. is an example of a MAC CE showing notification method 1-2.

[0019] Figure 5 FIG. is an example of a MAC CE showing notification method 1-3.

[0020] Figure 6 This is a diagram showing an example of the MAC CE for the notification method 2-1.

[0021] Figure 7 This is a diagram showing an example of the MAC CE for the notification method 2-2.

[0022] Figure 8A And Figure 8B This is a diagram showing an example of the MAC CE for the notification method 2-3.

[0023] Figure 9 This is a diagram showing an example of the third embodiment.

[0024] Figure 10A And Figure 10B This is a diagram showing an example of a modified example of the third embodiment.

[0025] Figure 11 This is a diagram showing an example of the fourth embodiment.

[0026] Figure 12 This is a diagram showing an example of the schematic structure of a wireless communication system according to an embodiment.

[0027] Figure 13 This is a diagram showing an example of the structure of a base station according to an embodiment.

[0028] Figure 14 This is a diagram showing an example of the structure of a user terminal according to an embodiment.

[0029] Figure 15 This is a diagram showing an example of the hardware structure of a base station and a user terminal according to an embodiment. Detailed Embodiments

[0030] (TCI, Spatial Relation, QCL)

[0031] In NR, research is being conducted on controlling the reception processing (e.g., at least one of reception, demapping, demodulation, decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, encoding) of at least one of a signal and a channel (referred to as a signal / channel) in a UE based on a Transmission Configuration Indication state (TCI state).

[0032] The TCI state can also represent information on the signal / channel applied to the downlink. Information corresponding to the TCI state of the signal / channel applied to the uplink can also be referred to as a spatial relation.

[0033] The TCI state is information related to the Quasi-Co-Location (QCL) of a signal / channel, and can also be referred to as spatial reception parameters, Spatial Relation Information, etc. The TCI state can also be set for a UE on a per-channel or per-signal basis.

[0034] QCL is an indicator representing the statistical properties of a signal / channel. For example, it can also mean that in the case where a certain signal / channel has a QCL relationship with other signals / channels, it can be assumed that at least one of Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter) is the same among these different signals / channels (they are QCL with respect to at least one of them).

[0035] In addition, the spatial reception parameter can also correspond to the reception beam of a UE (e.g., a reception analog beam), and the beam can also be determined based on spatial QCL. The QCL (or at least one element of QCL) in the present disclosure can also be replaced by sQCL (spatial QCL).

[0036] Regarding QCL, multiple types (QCL types) can also be defined. For example, four QCL types A - D can be set, and the parameters (or parameter sets) that can be assumed to be the same among these four QCL types A - D are different. The parameter (which can also be referred to as the QCL parameter) is represented as follows:

[0037] · QCL type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread,

[0038] · QCL type B (QCL-B): Doppler shift and Doppler spread,

[0039] · QCL type C (QCL-C): Doppler shift and average delay,

[0040] · QCL type D (QCL-D): spatial reception parameter.

[0041] The situation where the UE assumes that a certain control resource set (CORESET), channel, or reference signal is in a specific QCL (e.g., QCL type D) relationship with other CORESETs, channels, or reference signals can also be referred to as a QCL assumption.

[0042] The UE can also determine at least one of the transmit beam (Tx beam) and the receive beam (Rx beam) of the signal / channel based on the TCI state or QCL assumption of the signal / channel.

[0043] The TCI state can also be, for example, information related to the QCL between the channel that is the object (in other words, the reference signal (RS) used for this channel) and other signals (e.g., other RSs). The TCI state can also be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

[0044] The physical layer signaling can also be, for example, downlink control information (Downlink Control Information (DCI)).

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

[0046] In addition, the RS that has a QCL relationship with this channel can be, for example, at least one of a Synchronization Signal Block (SSB), a Channel State Information Reference Signal (CSI-RS), a reference signal for measurement (Sounding Reference Signal (SRS)), a CSI-RS for tracking (also referred to as a Tracking Reference Signal (TRS)), and a reference signal for QCL detection (also referred to as a QRS).

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

[0048] The RS of QCL type X in the TCI state can also mean an RS that has a QCL type X relationship with a certain channel / signal (the DMRS of which), and this RS can also be referred to as the QCL source of QCL type X in this TCI state.

[0049] (Default TCI state / default spatial relationship / default PL-RS)

[0050] In the RRC connected mode, in both the case where the TCI information (the higher layer parameter TCI-PresentInDCI) in the DCI is set to "valid (enabled)" and the case where the TCI information in the DCI is not set, when the time offset between the reception of the DL DCI (the DCI that schedules the PDSCH) and the corresponding PDSCH (the PDSCH scheduled by this DCI) is less than a threshold (timeDurationForQCL) (application condition, first condition), if in the case of non-cross-carrier scheduling, the TCI state (default TCI state) of the PDSCH can also be the TCI state of the lowest CORESET ID in the latest time slot within the active DL BWP of this (specific UL signal) CC. In the case where it is not like that, the TCI state (default TCI state) of the PDSCH can also be the TCI state of the lowest TCI state ID of the PDSCH within the active DL BWP of the scheduled CC.

[0051] In Rel.15, each MAC CE for activating / deactivating PUCCH spatial relation and each MAC CE for activating / deactivating SRS spatial relation are required. The PUSCH spatial relation follows the SRS spatial relation.

[0052] In Rel.16, at least one of the MAC CE for activating / deactivating PUCCH spatial relation and the MAC CE for activating / deactivating SRS spatial relation may not be used.

[0053] If neither the spatial relation for PUCCH nor the PL-RS is configured in FR2 (application condition, second condition), the default assumptions for the spatial relation of PUCCH and the PL-RS (default spatial relation and default PL-RS) are applied. If neither the spatial relation for SRS (SRS resource for SRS or the SRS resource corresponding to the SRS resource indicator (SRI) within DCI format 0_1 for scheduling PUSCH) nor the PL-RS is configured in FR2 (application condition, second condition), the default assumptions for the spatial relation and the PL-RS (default spatial relation and default PL-RS) are applied to the PUSCH and SRS scheduled by DCI format 0_1.

[0054] If a CORESET is configured within the activated DL BWP on this CC, the default spatial relation and the default PL-RS may also be the TCI state or the QCL assumption of the CORESET with the lowest CORESET ID within the activated DL BWP. If no CORESET is configured within the activated DL BWP on this CC, the default spatial relation and the default PL-RS may also be the activated TCI state with the lowest ID of the PDSCH within the activated DL BWP.

[0055] In Rel.15, the spatial relation of the PUSCH scheduled by DCI format 0_0 follows the spatial relation of the PUCCH resource with the lowest PUCCH resource ID among the activated spatial relations of the PUCCH on the same CC. Even if no PUCCH is transmitted on the SCell, the network needs to update the PUCCH spatial relations on all SCells.

[0056] In Rel.16, the PUCCH configuration for the PUSCH scheduled by DCI format 0_0 is not required. For the PUSCH scheduled by DCI format 0_0, when there is no active PUCCH spatial relation or no PUCCH resource on the active UL BWP within this CC (application condition, second condition), the default spatial relation and default PL-RS are applied in this PUSCH.

[0057] The above threshold can also be referred to as the QCL time length (duration), "timeDurationForQCL", "Threshold", "Threshold for offset between a DCI indicating a TCI state and a PDSCH scheduled by the DCI", "Threshold-Sched-Offset", scheduling offset threshold, etc.

[0058] The number of bits of the SRS resource indicator (SRI) field in DCI format 0_1 depends on the number of SRS resources configured (for the purpose of codebook transmission / non-codebook transmission).

[0059] (Multi-TRP)

[0060] In NR, studies are being conducted on using one or more transmission / reception points (TRPs) (multi-TRP (MTRP)) with one or more panels for DL transmission to the UE. In addition, studies are being conducted on the UE using one or more panels for UL transmission to one or more TRPs.

[0061] In addition, multiple TRPs can correspond to the same cell identifier (cell ID) or different cell IDs. The cell ID can be either a physical cell ID or a virtual cell ID.

[0062] Multiple TRPs (e.g., TRP#1, #2) can also be connected via ideal / non-ideal backhaul and exchange information, data, etc. Different codewords (Code Word (CW)) and different layers can also be sent from each TRP of the multiple TRPs. As a way of transmitting from multiple TRPs, Non-Coherent Joint Transmission (NCJT) can also be used.

[0063] In NCJT, for example, TRP#1 modulates and maps the first codeword, performs layer mapping, and uses the first precoding for the first number of layers (e.g., two layers) to transmit the first PDSCH. In addition, TRP#2 modulates and maps the second codeword, performs layer mapping, and uses the second precoding for the second number of layers (e.g., two layers) to transmit the second PDSCH.

[0064] In addition, multiple PDSCHs (multi-PDSCH) subject to NCJT can also be defined as partially or completely overlapping with respect to at least one of the time domain and the frequency domain. That is, at least one of the time and frequency resources of the first PDSCH from the first TRP and the second PDSCH from the second TRP can also overlap.

[0065] It can also be envisaged that these first PDSCH and second PDSCH are not in a Quasi-Co-Location (QCL) relationship (not quasi-co-located). The reception of the multi-PDSCH can also be replaced by the simultaneous reception of PDSCHs that are not of a certain QCL type (e.g., QCL type D).

[0066] Multiple PDSCHs from multiple TRPs (which can also be referred to as multiple PDSCH (multiple PDSCH)) can also be scheduled using one DCI (single DCI, single PDCCH) (single master mode). Multiple PDSCHs from multiple TRPs can also be scheduled separately using multiple DCIs (multiple DCIs, multiple PDCCH (multiple PDCCH)) (multiple master modes).

[0067] According to such a multiple TRP scenario, more flexible transmission control using a good-quality channel can be performed.

[0068] To support multi-TRP transmission within a cell (intra-cell, with the same cell ID) and between cells (inter-cell, with different cell IDs) based on multiple PDCCHs, in the RRC configuration information for multiple pairs of PDCCHs and PDSCHs that link multiple TRPs, one control resource set (CORESET) within the PDCCH configuration information (PDCCH-Config) can also correspond to one TRP.

[0069] (Unified TCI framework)

[0070] A unified TCI framework for beam indication for DL and UL is under study.

[0071] Figure 1 The UE-specific PDSCH TCI States Activation / Deactivation MAC CE contains a CORESET pool ID field, a serving cell ID field, a BWP ID field, and a T i field.

[0072] If the T i field is set to 1, it indicates that the TCI state with TCI state ID i is activated and mapped to the code point of the TCI field of the DCI. The code point of the mapped TCI state is determined by the position in the order of all TCI states accompanied by the T i field set to 1. The CORESET pool ID indicates that the mapping between the activated TCI state and the code point of the TCI of the DCI set by the T i field is specific to the CORESET with the CORESET pool ID set.

[0073] This MAC CE is used for PDSCH reception based on multi-DCI multi-TRP and single-TRP PDSCH reception.

[0074] Figure 2 The Enhanced TCI States Activation / Deactivation for UE-specific PDSCH MAC CE contains a reserved (R) field (reserved bit), a serving cell ID field, a BWP ID field, a C i field, and a TCI state IDi，j field

[0075] C i The field indicates whether there is an octet containing the TCI status ID i，2 field. The TCI status ID i，j The field indicates the j-th TCI status indicated for the i-th code point in the TCI field for DCI. The TCI code point of the mapped TCI status is determined by the position in the order among all TCI code points represented by the set of i，j fields

[0076] This MAC CE is used for PDSCH reception of multiple TRPs based on a single DCI

[0077] The MAC CE for activating / deactivating the TCI state for the UE-specific PDSCH ( Figure 1 ) and the MAC CE for activating / deactivating the extended TCI state for the UE-specific PDSCH ( Figure 2 ) can be referred to as either the MAC CE of Rel.16 or the TCI state MAC CE for PDSCH

[0078] The RRC signaling can also set new spatial relation information (e.g., SpatialRelationInfo-r17). This spatial relation information can also be used in the spatial relation or QCL assumption between a reference RS (e.g., SSB / CSI-RS / SRS) and a target RS (e.g., UL RS such as DMRS of PUCCH or PUSCH, PRACH, SRS). This spatial relation information can also include at least one of a spatial relation information ID, a serving cell ID, and a reference signal. The reference signal can also include any one of an SSB index, a CSI-RS index (NZP-CSI-RS resource ID), and an SRS (SRS resource ID and BWP ID of the UL BWP)

[0079] In addition to using RRC signaling, the MAC CE can also be used for activating / deactivating the spatial relation information for SRS, PUCCH, and SRS. The L1 signaling (DCI) can also be used in the dynamic indication (of the spatial relation information) for at least one of aperiodic(A)-SRS, PUSCH, PRACH, and PUCCH. A new field of the DCI format can also be used in the dynamic indication for PDCCH-indicated (PDCCHordered) PRACH. A new field in the DL grant can also be used in the dynamic indication for PUCCH

[0080] Up to 64 spatial relation information can be configured for PUCCH (spatialRelationInfoToAddModList within PUCCH-Config). If the unified TCI framework is used, at least 64 spatial relation information (e.g., SpatialRelationInfo-r17) is required. For PUSCH, considering the DCI overhead, a subset of the spatial relation information for activating PUSCH is considered via MAC CE, and the DCI indicates one spatial relation information for PUSCH from the activated spatial relation information. For example, the MAC CE activates M spatial relation information, and the m-bit DCI selects one of the M. For example, when M is 2, m is 1.

[0081] However, there are concerns about the reduction in communication quality / throughput due to the latency / overhead in the beam indication for the downlink (DL) / uplink (UL).

[0082] Therefore, the inventors of the present invention have come up with a method for beam indication for DL / UL.

[0083] Hereinafter, embodiments related to the present disclosure will be described in detail with reference to the drawings. The structures described in each embodiment can be applied separately or in combination.

[0084] In the present disclosure, "A / B" and "at least one of A and B" can be replaced with each other. In the present disclosure, cell, CC, carrier, BWP, DL BWP, UL BWP, active DL BWP, active UL BWP, and band can be replaced with each other. In the present disclosure, index, ID, indicator, and resource ID can be replaced with each other. In the present disclosure, RRC, RRC parameter, RRC message, higher layer parameter, information element (IE), and configuration can be replaced with each other. In the present disclosure, support, control, be able to control, operate, and be able to operate can be replaced with each other.

[0085] In the present disclosure, activate, update, indicate, enable, and specify can be replaced with each other.

[0086] In the present disclosure, MAC CE, update command, and activate / deactivate command can be replaced with each other.

[0087] In the present disclosure, higher layer signaling can also be any one of, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.

[0088] MAC signaling can also use, for example, MAC control elements (MAC Control Element (MAC CE)), MAC protocol data units (MAC Protocol Data Unit (PDU)), etc. Broadcast information can also be, for example, the Master Information Block (Master Information Block (MIB)), System Information Block (System Information Block (SIB)), minimum system information (Remaining Minimum System Information (RMSI)), other system information (Other System Information (OSI)), etc.

[0089] In the present disclosure, a beam, a spatial domain filter, a TCI state, a QCL assumption, QCL parameters, a spatial domain receiving filter, a UE spatial domain receiving filter, a UE receiving beam, a DL beam, a DL receiving beam, DL precoding, a DL precoder, DL-RS, the QCL type D of the TCI state, the RS of the QCL type D of the TCI state, the RS of the QCL type D of the TCI state or QCL assumption, the RS of the QCL type A of the TCI state or QCL assumption, a spatial relationship, a spatial domain transmitting filter, a UE spatial domain transmitting filter, a UE transmitting beam, a UL beam, a UL transmitting beam, UL precoding, a UL precoder can also be replaced with each other. In the present disclosure, a QCL type X-RS, a DL-RS associated with the QCL type X, a DL-RS having the QCL type X, a source of the DL-RS, an SSB, a CSI-RS can also be replaced with each other.

[0090] In the present disclosure, a UL TCI state and a unified TCI state that can be used in a UL channel / RS (for example, PUCCH / PUSCH / SRS / UL DMRS) can also be replaced with each other. In the present disclosure, a TCI state for UL and new spatial relationship information (for example, spatioalRelationInfo-r17) can also be replaced with each other. In the present disclosure, a TCI state ID and a new spatial relationship information ID (for example, spatioalRelationInfoID-r17) can also be replaced with each other.

[0091] In the present disclosure, information related to the spatial relationship between a reference RS and a target RS, information related to a UL TCI state, information related to a common TCI state in DL and UL, and information related to a unified TCI state can also be replaced with each other.

[0092] In the present disclosure, the panel, uplink (UL) transmission entity, TRP, spatial relationship, control resource set (CORESET), PDSCH, codeword, base station, antenna port of a certain signal (e.g., demodulation reference signal (DMRS) port), antenna port group of a certain signal (e.g., DMRS port group), group for multiplexing (e.g., code division multiplexing (CDM) group, reference signal group, CORESET group), CORESET pool, CW, redundancy version (RV), layer (MIMO layer, transmission layer, spatial layer) can also be replaced with each other. In addition, the panel identifier (ID) can also be replaced with the panel. In the present disclosure, the TRP ID can also be replaced with the TRP.

[0093] In the present disclosure, a UE configured with multiple TRPs can also determine at least one of the TRP corresponding to the DCI, the TRP corresponding to the PDSCH or UL transmission (PUCCH, PUSCH, SRS, etc.) scheduled by the DCI, etc. based on at least one of the following.

[0094] · The value of a specific field included in the DCI (e.g., the field specifying the TRP, antenna port field, PRI).

[0095] · The 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).

[0096] · The DMRS corresponding to the PDCCH to which the DCI is sent (e.g., the sequence, resource, CDM group, DMRS port, DMRS port group, etc. of the DMRS).

[0097] · The CORESET that receives the DCI (e.g., the CORESET pool ID of the CORESET, the ID of the CORESET, scrambling ID (which can also be replaced with sequence ID), resource, etc.).

[0098] · The RS (RS related group, etc.) used for TCI state, QCL assumption, spatial relationship information, etc.

[0099] In the present disclosure, a single PDCCH (DCI) may also be referred to as a PDCCH (DCI) of a first scheduling type (e.g., scheduling type A (or type 1)). In addition, a multi-PDCCH (DCI) may also be referred to as a PDCCH (DCI) of a second scheduling type (e.g., scheduling type B (or type 2)).

[0100] In the present disclosure, it is also conceivable that a single PDCCH is supported in the case where multiple TRPs utilize an ideal backhaul. It is also conceivable that a multi-PDCCH is supported in the case where multiple TRPs utilize a non-ideal backhaul.

[0101] In addition, an ideal backhaul may also be referred to as a DMRS port group type 1, a reference signal association group type 1, an antenna port group type 1, a CORESET pool type 1, etc. A non-ideal backhaul may also be referred to as a DMRS port group type 2, a reference signal association group type 2, an antenna port group type 2, a CORESET pool type 2, etc. The names are not limited to these.

[0102] In the present disclosure, multiple TRPs, a multiple-TRP system, multiple-TRP transmission, and multiple PDSCHs may also be interchangeable with each other. In the present disclosure, a single DCI, a single PDCCH, a multiple-TRP system based on a single DCI, activation of two TCI states on at least one TCI code point, and association of one DCI with two TCI states may also be interchangeable with each other. In the present disclosure, a multiple-TRP system based on multiple DCIs, multiple PDCCHs, setting of a CORESET pool index (for a CORESET), and association of two DCIs with two TCI states may also be interchangeable with each other. A single TRP, a single-TRP system, single-TRP transmission, a single PDSCH, a TCI code point not associated with more than two TCI states and without setting a CORESET pool index may also be interchangeable with each other.

[0103] (Wireless communication method)

[0104] <First Embodiment>

[0105] For the PDSCH TCI state and the PUSCH TCI state, different MAC CEs may also be used. A new MAC CE may also be introduced for activation of the PUSCH TCI state. The new MAC CE may also have a new logical channel (logical channel ID (LCID)).

[0106] The new MAC CE may also follow at least one of the following notification methods 1-1 to 1-3. The notification methods 1-1 to 1-3 may also be the same MAC CE, and at least one of the notification methods 1-1 to 1-3 may also be different from other MAC CEs. The single TRP PUSCH transmission may also be a PUSCH transmission using the mechanism of Rel.15.

[0107] "Notification Method 1-1"

[0108] The new MAC CE may also be a MAC CE for single TRP PUSCH transmission.

[0109] For single TRP PUSCH transmission, the MAC CE may also activate X TCI states for PUSCH from the TCI states set by RRC. The activated TCI states may also be mapped to the code points of the DCI field indicating the PUSCH TCI.

[0110] The maximum number of TCI states activated for PUSCH may also be specified in the specification. For example, the maximum number of activated TCI states may be 2, 4, 8 or other numbers.

[0111] [Example 1]

[0112] In Figure 3A 's example, the MAC CE includes an R field, a serving cell ID field, a BWP ID field, and a T i field.

[0113] If the T i field is set to 1, it may also indicate that the TCI state with TCI state ID i is activated and is mapped to the DCI code point indicating the TCI state for PUSCH. The first TCI state associated with the T i field set to 1 may also be mapped to the code point value 0. The nth TCI state associated with the T i field set to 1 may also be mapped to the code point value n-1.

[0114] The maximum number of the T i field set to 1 may also follow the specification or RRC setting. For example, it may also be limited to 8 per BWP.

[0115] The MAC CE size may also depend on the number of TCI states set for UL in the RRC information element (IE). In this example, 64 TCI states are set.

[0116] [Example 2]

[0117] In Figure 3BIn the example, the MAC CE includes an R field, a serving cell ID field, a BWP ID field, and a TCI status ID i field.

[0118] The TCI status ID i field may also indicate a TCI status that is activated and mapped to the code point (i) of the DCI field indicating the TCI status for PUSCH.

[0119] In this example, the maximum number of UL TCI statuses is 64, and the TCI status ID field is 6 bits. The size of the TCI status ID field can also be other numbers. For example, the maximum number of UL TCI statuses can also be 128, and the TCI status ID field can also be 7 bits.

[0120] "Notification Method 1-2"

[0121] The new MAC CE can also be a MAC CE for multi-TRP PUSCH transmission based on multiple DCIs.

[0122] The new MAC CE can also follow any one of the following Option 1 and Option 2.

[0123] [Option 1]

[0124] The CORESET pool ID can also be included in the MAC CE. When the CORESET pool ID is set to 0, the MAC CE can also be applied to the PUSCH scheduled by the CORESET pool ID equal to 0. When the CORESET pool ID is set to 1, the MAC CE can also be applied to the PUSCH scheduled by the CORESET pool ID equal to 1.

[0125] Other features can also be the same as those of Notification Method 1-1.

[0126] [Example 1]

[0127] In Figure 4A the example, the MAC CE includes a CORESET pool ID field, a serving cell ID field, a BWP ID field, and a T i field.

[0128] [Example 2]

[0129] In Figure 4B the example, the MAC CE includes a CORESET pool ID field, a serving cell ID field, a BWP ID field, an R field, and a TCI status ID i field.

[0130] [Option 2]

[0131] The new MAC CE can also reuse Notification Method 1-1. In this case, for PUSCHs scheduled via different CORESET pool IDs, the same set of TCI states can also be activated.

[0132] Notification Method 1-3

[0133] The new MAC CE can also be a MAC CE for single-DCI based multi-TRP PUSCH transmission.

[0134] For single-DCI based multi-TRP PUSCH transmission, the MAC CE can also activate X combinations of TCI states for PUSCH from the TCI states configured via RRC. The activated combinations of TCI states can also be mapped to the code points of the DCI field indicating PUSCH TCI.

[0135] Each combination can also contain Y TCI states. One combination of TCI states can also be used in multi-TRP based PUSCH transmission. Here, each TCI state can also correspond to PUSCH transmission to each TRP.

[0136] The maximum number of activated combinations of TCI states for PUSCH can also be specified in the specification. For example, the maximum number of activated TCI states can be 2, 4, 8 or other numbers.

[0137] The number of TCI states within each combination mapped to the DCI code point can also be specified in the specification.

[0138] In Figure 5 's example, the MAC CE contains an R field, a serving cell ID field, a BWP ID field, a C i field and a TCI state ID i，j field.

[0139] C i field indicates whether there is an octet containing the TCI state ID i，2 field. The TCI state ID i，1 field and the TCI state ID i，2 field can also indicate the TCI state that is activated and mapped to the code point (i) of the DCI field indicating the TCI state for PUSCH.

[0140] In this example, the maximum number of UL TCI states is 64 and the TCI state ID field is 6 bits. The size of the TCI state ID field can also be other numbers. For example, the maximum number of UL TCI states can be 128 and the TCI state ID field can be 7 bits.

[0141] In this example, each DCI code point is mapped to two TCI states (a combination of TCI states). The number of TCI states mapped to each DCI code point can also be another number Y.

[0142] According to the above first embodiment, the TCI state can be appropriately indicated for the PUSCH.

[0143] <Second Embodiment>

[0144] The same MAC CE can also be used in the activation / deactivation of the TCI state applied to both the PDSCH and the PUSCH.

[0145] The Rel.16 MAC CE for PDSCH TCI activation can also be reused. The indication within the MAC CE can also be applied to both the PDSCH and the PUSCH.

[0146] A new MAC CE for TCI activation can also be introduced. The indication within the MAC CE can also be applied to both the PDSCH and the PUSCH.

[0147] The activation / deactivation of the TCI state for PUSCH transmission can also follow at least one of the following notification methods 2-1 to 2-5. The single-TRP PUSCH transmission can also be a PUSCH transmission using the Rel.15 mechanism.

[0148] "Notification Method 2-1"

[0149] For single-TRP PUSCH transmission, the UE-specific PDSCH TCI state activation / deactivation MAC CE ( Figure 1 ) can also be reused.

[0150] If the T i field is set to 1, it can also indicate that the TCI state with TCI state ID i is activated and is mapped to the DCI code point indicating the PUSCH TCI state. Along with the first TCI state of the T i field set to 1, it can also be mapped to the code point value 0. Along with the nth TCI state of the T i field set to 1, it can also be mapped to the code point value n-1.

[0151] In the case where the number of TCI states set for the PUSCH is less than the number of TCI states set for the PDSCH, the first X T i fields can also be applied to the PUSCH. X can also be the number of TCI states set for the PUSCH.

[0152] In the case where the maximum number of TCI states activated for PUSCH is less than the number of TCI states activated for PDSCH, the first X T fields set to 1 can also represent the TCI states activated for PUSCH. X can also be the maximum number of TCI states activated for PUSCH. i fields can also represent the TCI states activated for PUSCH. X can also be the maximum number of TCI states activated for PUSCH.

[0153] In Figure 6 the example of, it includes a CORESET pool ID field, a serving cell ID field, a BWP ID field, and a T i field. In this example, the number of TCI states set for PDSCH can also be 128, the number of TCI states set for PUSCH can also be 64, and the first 64 T i fields can also be applied to PUSCH.

[0154] "Notification Method 2-2"

[0155] For multi-TRP PUSCH transmission based on multi-DCI, the UE-specific PDSCH TCI state activation / deactivation MAC CE ( Figure 1 ) can also be reused. Other features can also be the same as in Notification Method 2-1.

[0156] The MAC CE can also follow any one of the following Option 1 and Option 2.

[0157] [Option 1]

[0158] In the case where the CORESET pool ID is set to 0, the MAC CE can also be applied to the PUSCH scheduled by the CORESET pool ID equal to 0. In the case where the CORESET pool ID is set to 1, the MAC CE can also be applied to the PUSCH scheduled by the CORESET pool ID equal to 1.

[0159] [Option 2]

[0160] It can also be that only when the CORESET pool ID is set to 0, the MAC CE is applied to PUSCH. In this case, for the PUSCH scheduled by different CORESET pool IDs, the same set of TCI states can also be activated.

[0161] [Variation]

[0162] There can also be multiple sets of T i fields, and each set corresponds to each CORESET pool ID.

[0163] The MAC CE may also include a P field. When the P field is set to 1, a second set of T i fields may also exist. Otherwise, the second set of T i fields may not exist.

[0164] In Figure 7 the example of, the MAC CE includes a P field, a serving cell ID field, a BWP ID field, and T i fields. In this example, the P field is set to 1, and the MAC CE includes a first set of T i fields and a second set of T i fields. The first set of T i fields corresponds to a CORESET pool ID of 0, and the second set of T i fields corresponds to a CORESET pool ID of 1.

[0165] "Notification Method 2-3"

[0166] For single-TRP PUSCH transmission, the UE-specific PDSCH activation / deactivation MAC CE for the extended TCI state ( Figure 2 ) may also be reused.

[0167] The MAC CE may also follow any one of the following Options 1 and 2.

[0168] [Option 1]

[0169] The TCI state ID i，1 field may also represent a TCI state that is activated and mapped to the code point (i) of the DCI field indicating the TCI state for PUSCH.

[0170] When the maximum number of TCI states activated for PUSCH is less than the number of pairs of TCI states activated for PDSCH, the first X TCI state ID i，1 fields may also be applied to PUSCH. X may also be the maximum number of TCI states activated for PUSCH.

[0171] In Figure 8A the example of, the TCI state ID 0，1 field is applied to PUSCH and mapped to code point 0. The TCI state ID 1，1 field is applied to PUSCH and mapped to code point 1.

[0172] [Option 2]

[0173] The TCI state ID i，jThe field may also indicate being activated and being mapped to the (j-th) TCI state of the code point (i) of the DCI field indicating the TCI state for PUSCH.

[0174] In the case where the maximum number of TCI states activated for PUSCH is smaller than the number of TCI states activated for PDSCH, the first X TCI state IDs i，j The field may also be applied to PUSCH. X may also be the maximum number of TCI states activated for PUSCH.

[0175] In Figure 8B the example of, the TCI state ID 0，1 The field is applied to PUSCH and is mapped to code point 0. The TCI state ID 0，2 The field is applied to PUSCH and is mapped to code point 1. The TCI state ID 1，1 The field is applied to PUSCH and is mapped to code point 2. The TCI state ID 1，2 The field is applied to PUSCH and is mapped to code point 3.

[0176] 《Notification Method 2-4》

[0177] For multi-TRP PUSCH transmission based on multi-DCI, the UE-specific PDSCH extended TCI state activation / deactivation MAC CE ( Figure 2 ) can also be reused.

[0178] [Option 1]

[0179] The TCI state ID i，1 The field and the TCI state ID i，2 The field indicate being activated and being mapped to the TCI state of the code point (i) of the DCI field indicating the TCI state for PUSCH.

[0180] In the case where the maximum number of pairs of TCI states activated for PUSCH is smaller than the number of pairs of TCI states activated for PDSCH, the first X pairs of the TCI state ID i，1 The field and the TCI state ID i，2 The first X pairs of the field may also indicate the TCI states activated for PUSCH. X may also be the maximum number of pairs of activated TCI states for PUSCH.

[0181] 《Notification Method 2-5》

[0182] The size (number of bits) of the field for UL-TCI status indication in the UL grant DCI may also depend on the number of TCI states for a specific purpose. The TCI state for a specific purpose may also be activated by a MAC CE. The TCI state for a specific purpose may also be at least one of the activated UL TCI state and the DL TCI state for the PDSCH. The UL grant DCI may also be at least one of DCI formats 0_0, 0_1, and 0_2.

[0183] For example, when the number of TCI states for a specific purpose activated in the MAC CE is N, the number of bits of the field for UL-TCI status indication may also be ceil(log2(N)).

[0184] <<Modification Example of the Second Embodiment>>

[0185] A new MAC CE for TCI state activation may also be introduced. The indication in the MAC CE may also be applied to both the PDSCH and the PUSCH.

[0186] The content of the new MAC CE may also be the same as any one of Notification Methods 2-1 to 2-4. Different LCIDs may also be used for the new MAC CE and the MAC CE of Rel.16.

[0187] Both of the following Case 1 and Case 2 may be supported, or it may be set by higher layer signaling which of Case 1 and Case 2 is supported.

[0188] [Case 1] The UE receives both the MAC CE of Rel.16 and the new MAC CE.

[0189] [Case 2] The UE receives both new MAC CEs.

[0190] According to the above second embodiment, the TCI state can be appropriately indicated for the PDSCH and the PUSCH.

[0191] <<Third Embodiment>>

[0192] The same MAC CE may also be used for TCI state activation / deactivation of the PDSCH and the PUSCH. It may also be indicated based on 1 bit in the MAC CE which of the PDSCH and the PUSCH the MAC CE is applied to.

[0193] The Rel.16 MAC CE for PDSCH TCI activation may also be reused. The indication in the MAC CE may also be based on 1 bit to indicate which of the PDSCH and the PUSCH it is applied to.

[0194] Based on the content of the MAC CE in the second embodiment and UE operations, 1 bit in the MAC CE can also indicate whether the MAC CE is applied to PDSCH or PUSCH.

[0195] When this bit is set to 0, the MAC CE can also be applied to PDSCH. When this bit is set to 1, the MAC CE can also be applied to PUSCH, and the UE operations in the second embodiment can also be applied to PUSCH.

[0196] For activating / deactivating the MAC CE for UE-specific PDSCH with extended TCI state ( Figure 2 ), an R field can also be used as an identifier for PDSCH or PUSCH. When the bit in the R field is set to 0, the MAC CE can also be applied to PDSCH. When this bit is set to 1, the MAC CE can also be applied to PUSCH, and the UE operations in Notification Methods 2-3 / 2-4 can also be applied to PUSCH.

[0197] In Figure 9 's example, the first R field in the MAC CE for activating / deactivating the UE-specific PDSCH with extended TCI state can also be used as an identifier for PDSCH or PUSCH.

[0198] 《Variant of the Third Embodiment》

[0199] In the MAC CE for activating / deactivating the UE-specific PDSCH with TCI state ( Figure 1 ), the R field is not used. Therefore, this MAC CE can be defined as a new MAC CE without being reused.

[0200] A new MAC CE for TCI activation can also be introduced. The indication in the MAC CE can also be applied to either PDSCH or PUSCH based on a 1-bit indication.

[0201] Based on the content of the MAC CE and UE operations in any of Notification Methods 2-1 to 2-4, 1 bit in the MAC CE can also indicate whether the MAC CE is applied to PDSCH or PUSCH. When this bit is set to 0, the MAC CE can also be applied to PDSCH. When this bit is set to 1, the MAC CE can also be applied to PUSCH, and the UE operations in any of Notification Methods 2-1 to 2-4 can also be applied to PUSCH.

[0202] [Example 1]

[0203] In Figure 10A 's example, a 1-bit X field can also be introduced in the new MAC CE based on notification methods 2-1 / 2-2. The X field can also be an identifier for PDSCH or PUSCH.

[0204] [Example 2]

[0205] In Figure 10B 's example, the initial R field of the new MAC CE based on notification methods 2-3 / 2-4 can also be used as an identifier for PDSCH or PUSCH.

[0206] For the new MAC CE and the MAC CE of Rel.16, different LCIDs can also be used.

[0207] It can support both of the following cases 1 and 2, or it can be set by higher layer signaling which of the following cases 1 and 2 to support.

[0208] [Case 1] The UE receives both the MAC CE of Rel.16 and the new MAC CE.

[0209] [Case 2] The UE receives both new MAC CEs.

[0210] According to the above third embodiment, the TCI state can be appropriately indicated for PDSCH and PUSCH through the same type of MAC CE.

[0211] <Fourth Embodiment>

[0212] The UE can also support simultaneous TCI state activation (update) for multiple serving cells / BWPs.

[0213] The RRC can also set a maximum of X applicable CC lists.

[0214] The TCI state activated for PUSCH can also be applied to all CCs / BWPs within the same applicable list as the CC (serving cell) indicated by the MAC CE.

[0215] In Figure 11 's example, the UE is set with an applicable CC list representing CC#0, #1, #2, #3, and a TCI state list representing one or more TCI states for each CC / BWP. When one TCI state of CC#0 is activated by the MAC CE, the corresponding TCI states are activated in CC#1, #2, #3.

[0216] The simultaneous TCI state activation for multiple serving cells / BWPs can be applied only to a single TRP, or it can be applied to a single TRP and multiple TRPs.

[0217] According to the fourth embodiment above, low-overhead and low-latency beam indication can be achieved.

[0218] <Fifth Embodiment>

[0219] For at least one of the first to third embodiments, a UE capability indicating whether to support the MAC CE for PUSCH TCI state activation may also be defined. At least one of the first to third embodiments may be applicable only when the corresponding UE capability is reported.

[0220] For at least one of the first to third embodiments, it may also be set by an RRC parameter (IE) whether the MAC CE for PUSCH TCI state activation is valid. At least one of the first to third embodiments may be applicable only when the corresponding RRC parameter is set.

[0221] For the fourth embodiment, a UE capability indicating whether to support simultaneous PUSCH TCI state activation across multiple CCs / BWPs may also be defined. The fourth embodiment may be applicable only when the corresponding UE capability is reported.

[0222] According to the fifth embodiment above, compatibility with other UEs can be maintained, and the TCI state can be appropriately indicated for PUSCH.

[0223] (Wireless Communication System)

[0224] Hereinafter, the structure of a wireless communication system according to an embodiment of the present disclosure will be described. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above-described various embodiments of the present disclosure.

[0225] Figure 12 FIG. is an example showing a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may also be a system that realizes communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the 5th generation mobile communication system New Radio (5G NR), or the like.

[0226] In addition, the wireless communication system 1 may also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple Radio Access Technologies (RATs). MR-DC may also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0227] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the Master Node (MN), and the base station (gNB) of NR is the Secondary Node (SN). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0228] The wireless communication system 1 may also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity where both the MN and the SN are base stations (gNBs) of NR (NR-NR Dual Connectivity (NN-DC))).

[0229] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a - 12c) that is configured within the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located within at least one cell. The configuration, quantity, etc. of each cell and the user terminal 20 are not limited to the manner shown in the figure. Hereinafter, without distinguishing between the base stations 11 and 12, they are collectively referred to as the base station 10.

[0230] The user terminal 20 may also be connected to at least one of the multiple base stations 10. The user terminal 20 may also utilize at least one of Carrier Aggregation (CA) and Dual Connectivity (DC) that uses multiple Component Carriers (CCs).

[0231] Each CC may also 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 also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may also be a frequency band below 6 GHz (sub-6 GHz), and FR2 may also be a frequency band above 24 GHz (above-24 GHz). In addition, the frequency bands, definitions, etc. of FR1 and FR2 are not limited to these. For example, FR1 may also correspond to a frequency band higher than FR2.

[0232] In addition, in each CC, the user terminal 20 may also use at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) for communication.

[0233] Multiple base stations 10 may also be connected by wire (e.g., optical fiber based on the Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station (relay) may also be referred to as an IAB node.

[0234] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may, for example, also include at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), etc.

[0235] The user terminal 20 may also be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0236] In the wireless communication system 1, a wireless access method based on Orthogonal Frequency Division Multiplexing (OFDM) can also 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. can also be used.

[0237] The wireless access method can also be referred to as a waveform. Additionally, in the wireless communication system 1, in the wireless access methods of the UL and the DL, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be used.

[0238] As a downlink channel, in the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. that are shared among the user terminals 20 can also be used.

[0239] Furthermore, as an uplink channel, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. that are shared among the user terminals 20 can also be used.

[0240] User data, high-layer control information, System Information Block (SIB), etc. are transmitted through PDSCH. User data, high-layer control information, etc. can also be transmitted through PUSCH. In addition, the Master Information Block (MIB) can also be transmitted through PBCH.

[0241] Low-layer control information can also be transmitted through PDCCH. The low-layer control information can also include, for example, downlink control information (Downlink Control Information (DCI)), and the downlink control information includes scheduling information of at least one of PDSCH and PUSCH.

[0242] In addition, the DCI that schedules PDSCH can also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules PUSCH can also be referred to as UL grant, UL DCI, etc. In addition, PDSCH can also be replaced by DL data, and PUSCH can also be replaced by UL data.

[0243] In the detection of PDCCH, the Control Resource Set (CORESET) and the search space can also be utilized. CORESET corresponds to the resource for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. One CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a certain search space based on the search space setting.

[0244] One search space can also correspond to PDCCH candidates equivalent to one or more aggregation levels. One or more search spaces can also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", etc. in the present disclosure can also be replaced with each other.

[0245] Uplink control information (Uplink Control Information (UCI)) including at least one of channel state information (Channel State Information (CSI)), delivery confirmation information (which can also be referred to as Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (Scheduling Request (SR)) can also be transmitted via PUCCH. The random access preamble for establishing a connection with a cell can also be transmitted via PRACH.

[0246] In addition, in the present disclosure, the downlink, uplink, etc. can also be expressed without "link". Furthermore, it can also be expressed without "Physical" at the beginning of various channels.

[0247] In the wireless communication system 1, synchronization signal (Synchronization Signal (SS)), downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. As the DL-RS, in the wireless communication system 1, cell-specific reference signal (Cell-specific Reference Signal (CRS)), channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), demodulation reference signal (DeModulation Reference Signal (DMRS)), positioning reference signal (Positioning Reference Signal (PRS)), phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. can also be transmitted.

[0248] The synchronization signal can, for example, also be at least one of the primary synchronization signal (Primary Synchronization Signal (PSS)) and the secondary synchronization signal (Secondary Synchronization Signal (SSS)). The signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be referred to as an SS / PBCH block, an SS block (SS Block (SSB)), etc. In addition, SS, SSB, etc. can also be referred to as reference signals.

[0249] In addition, in the wireless communication system 1, as the uplink reference signal (UL-RS), it is also possible to transmit a measurement reference signal (sounding reference signal (SRS)), a demodulation reference signal (DMRS), etc. In addition, DMRS can also be referred to as a user terminal specific reference signal (UE-specific Reference Signal).

[0250] (Base station)

[0251] Figure 13 FIG. is an example showing the structure of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission path interface (transmission line interface) 140. In addition, one or more of the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140 may be provided respectively.

[0252] In addition, in this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, and it can also be assumed that the base station 10 also has other functional blocks required for wireless communication. A part of the processing of each unit described below may also be omitted.

[0253] The control unit 110 implements overall control of the base station 10. The control unit 110 can be composed of a controller, a control circuit, etc. described based on the common knowledge in the technical field related to the present disclosure.

[0254] The control unit 110 may also control the generation, scheduling (e.g., resource allocation, mapping), etc. of signals. The control unit 110 may also control the transmission / reception, measurement, etc. using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, a sequence, etc. to be transmitted as signals, and forward them to the transmission / reception unit 120. The control unit 110 may also perform call processing (setting, releasing, etc.) of communication channels, state management of the base station 10, management of radio resources, etc.

[0255] The transmission and reception unit 120 may also include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transmission and reception unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transmission and reception circuit, etc., which are described based on the common knowledge in the technical field related to the present disclosure.

[0256] The transmission and reception unit 120 may be configured as an integrated transmission and reception unit, or may be composed of a transmission unit and a reception unit. The transmission unit may also be composed of a transmission processing unit 1211 and an RF unit 122. The reception unit may also be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0257] The transmission and reception antenna 130 may be composed of an antenna, such as an array antenna, etc., which are described based on the common knowledge in the technical field related to the present disclosure.

[0258] The transmission and reception unit 120 may also transmit the above-mentioned downlink channels, synchronization signals, downlink reference signals, etc. The transmission and reception unit 120 may also receive the above-mentioned uplink channels, uplink reference signals, etc.

[0259] The transmission and reception unit 120 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of a transmission beam and a reception beam.

[0260] The transmission and reception unit 120 (transmission processing unit 1211), for example, may also perform processing of the Packet Data Convergence Protocol (PDCP) layer, processing of the Radio Link Control (RLC) layer (e.g., RLC retransmission control), processing of the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), etc., on the data, control information, etc., obtained from the control unit 110, and generate a bit string to be transmitted.

[0261] The transmission / reception unit 120 (transmission processing unit 1211) can also perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filter processing (filtering), Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, digital-to-analog conversion, etc. on the bit string to be transmitted, and output a baseband signal.

[0262] The transmission / reception unit 120 (RF unit 122) can also perform modulation to the radio frequency band, filter processing, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmission / reception antenna 130.

[0263] On the other hand, the transmission / reception unit 120 (RF unit 122) can also perform amplification, filter processing, demodulation to the baseband signal, etc. on the radio frequency band signal received through the transmission / reception antenna 130.

[0264] The transmission / reception unit 120 (reception processing unit 1212) can also perform reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filter processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, etc. on the obtained baseband signal, and obtain user data, etc.

[0265] The transmission / reception unit 120 (measurement unit 123) may also perform measurements related to the received signal. For example, the measurement unit 123 may also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may also perform measurements on received power (e.g., reference signal received power (RSRP)), reception quality (e.g., reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR), signal to noise ratio (SNR)), signal strength (e.g., received signal strength indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0266] The transmission path interface 140 may also transmit and receive signals (backhaul signaling) between the device included in the core network 30, other base stations 10, etc., and may also acquire, transmit, etc. user data (user plane data), control plane data, etc. for the user terminal 20.

[0267] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

[0268] The transmission / reception unit 120 may also receive a first media access control - control element (MAC CE) indicating one or more first transmission configuration indication (TCI) states activated for the physical downlink shared channel (PDSCH), and may also transmit a second MAC CE indicating one or more second TCI states activated for the physical uplink shared channel (PUSCH). The control unit 110 may also control the reception of the PUSCH to which one or more second TCI states indicated by the second MAC CE are applied.

[0269] The transmission / reception unit 120 may also transmit media access control-control element (MAC CE) for the physical downlink shared channel (PDSCH) and the physical uplink shared channel (PUSCH). The control unit 110 may also apply one or more transmission configuration indication (TCI) states represented by the MAC CE to at least one of the PDSCH and the PUSCH.

[0270] (User Equipment)

[0271] Figure 14 FIG. is an example showing the structure of a user equipment according to an embodiment. The user equipment 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. In addition, one or more of the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may be provided respectively.

[0272] In addition, in this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, and it can be assumed that the user equipment 20 also has other functional blocks required for wireless communication. A part of the processing of each unit described below may also be omitted.

[0273] The control unit 210 implements the overall control of the user equipment 20. The control unit 210 may be composed of a controller, a control circuit, etc. described based on the common knowledge in the technical field related to the present disclosure.

[0274] The control unit 210 may also control the generation, mapping, etc. of signals. The control unit 210 may also control the transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transmission / reception unit 220.

[0275] The transmission / reception 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 transmission / reception unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, etc. described based on the common knowledge in the technical field related to the present disclosure.

[0276] The transmission / reception unit 220 can be configured as an integrated transmission / reception unit, or can be composed of a transmission unit and a reception unit. The transmission unit can also be composed of a transmission processing unit 2211 and an RF unit 222. The reception unit can also be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0277] The transmission / reception antenna 230 can be composed of an antenna that can be described based on common knowledge in the technical field related to the present disclosure, such as an array antenna.

[0278] The transmission / reception unit 220 can also receive the above-mentioned downlink channels, synchronization signals, downlink reference signals, etc. The transmission / reception unit 220 can also transmit the above-mentioned uplink channels, uplink reference signals, etc.

[0279] The transmission / reception unit 220 can also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc. to form at least one of a transmission beam and a reception beam.

[0280] The transmission / reception unit 220 (transmission processing unit 2211) can also perform, for example, PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0281] The transmission / reception unit 220 (transmission processing unit 2211) can also perform transmission processing such as channel coding (which can include error correction coding), modulation, mapping, filter processing, DFT processing (if necessary), IFFT processing, precoding, digital-to-analog conversion, etc. on the bit string to be transmitted, and output a baseband signal.

[0282] In addition, regarding whether to apply DFT processing, it can also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when the transform precoding is effective (enabled), the transmission / reception unit 220 (transmission processing unit 2211) can also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using the DFT-s-OFDM waveform. In cases where it is not like that, the transmission / reception unit 220 (transmission processing unit 2211) can also not perform DFT processing as the above-mentioned transmission processing.

[0283] The transmission / reception unit 220 (RF unit 222) can also perform modulation to the radio frequency band, filter processing, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmission / reception antenna 230.

[0284] On the other hand, the transmission / reception unit 220 (RF unit 222) can also perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received through the transmission / reception antenna 230.

[0285] The transmission / reception unit 220 (reception processing unit 2212) can also perform reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing on the acquired baseband signal, and acquire user data, etc.

[0286] The transmission / reception unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 can also measure received power (e.g., RSRP), reception quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 210.

[0287] In addition, the transmission unit and the reception unit of the user terminal 20 in the present disclosure can also be constituted by at least one of the transmission / reception unit 220, the transmission / reception antenna 230, and the transmission path interface 240.

[0288] The transmission / reception unit 220 can also receive a first media access control - control element (MAC CE) indicating one or more first transmission configuration indication (TCI) states activated for the physical downlink shared channel (PDSCH), and can also receive a second MAC CE indicating one or more second TCI states activated for the physical uplink shared channel (PUSCH). The control unit 210 can also apply the one or more second TCI states indicated by the second MAC CE to the PUSCH.

[0289] In the case where the control resource set pool index is not set and one code point for the TCI state in the downlink control information is not associated with multiple TCI states, the reception unit can also receive the second MAC CE.

[0290] In the case where one or more control resource set pool indexes are set, the reception unit can also receive the second MAC CE.

[0291] In a case where one code point for a TCI state in downlink control information is associated with a plurality of TCI states, the receiving unit may also receive the second MAC CE.

[0292] The transmitting and receiving unit 220 may also receive a media access control - control element (MAC CE) for a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH). The control unit 210 may also apply one or more transmission setting indicators (TCI) states indicated by the MAC CE to at least one of the PDSCH and the PUSCH.

[0293] In a case where a control resource set pool index is not set and one code point for a TCI state in downlink control information is not associated with a plurality of TCI states, the receiving unit may also receive the MAC CE.

[0294] In a case where one or more control resource set pool indexes are set, the receiving unit may also receive the MAC CE.

[0295] In a case where one code point for a TCI state in downlink control information is associated with a plurality of TCI states, the receiving unit may also receive the MAC CE.

[0296] (Hardware Structure)

[0297] In addition, the block diagrams used in the description of the above embodiments illustrate blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. Furthermore, the implementation method of each functional block is not particularly limited. That is, each functional block may be implemented by a single device physically or logically combined, or may be implemented by two or more physically or logically separated devices directly or indirectly (e.g., by wire, wireless, etc.) connected with these multiple devices. The functional block may also be implemented by combining the above single device or the above multiple devices with software.

[0298] Here, in terms of functions, there are judgment, decision-making, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, establishment, comparison, assumption, expectation, regarded as, broadcasting, notifying, communicating, forwarding, configuration (setting), reconfiguration (re - setting), allocation (allocating, mapping), assignment, etc., but not limited to these. For example, a functional block (structural unit) that implements the transmission function may also be referred to as a transmitting unit, a transmitter, etc. Any of them is as described above, and the implementation method is not particularly limited.

[0299] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may also function as a computer that performs the processing of the wireless communication method of the present disclosure. Figure 15 FIG. is an example showing the hardware structure of a base station and a user terminal according to an embodiment. The above - mentioned base station 10 and user terminal 20 may also be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0300] In addition, in the present disclosure, terms such as device, circuit, equipment, section, unit, etc. can be mutually replaced. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured not to include some devices.

[0301] For example, only one processor 1001 is shown in the figure, but there may be multiple processors. In addition, the processing may be executed by one processor, or may be executed simultaneously, sequentially, or by other means by two or more processors. Additionally, the processor 1001 may also be implemented by one or more chips.

[0302] Regarding each function in the base station 10 and the user terminal 20, for example, by reading a specific software (program) into hardware such as the processor 1001 and the memory 1002, the processor 1001 performs operations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003, thereby realizing the function.

[0303] The processor 1001, for example, operates the operating system to control the entire computer. The processor 1001 may also be constituted by a central processing unit (Central Processing Unit (CPU)) including an interface with peripheral devices, a control device, an arithmetic device, registers, etc. For example, at least a part of the above control unit 110 (210), transmission / reception unit 120 (220), etc. may also be implemented by the processor 1001.

[0304] In addition, the processor 1001 reads a program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes based on them. As the program, a program that causes the computer to execute at least a part of the operations described in the above embodiments can be used. For example, the control unit 110 (210) may also be implemented by a control program stored in the memory 1002 and operating in the processor 1001, and the same applies to other functional blocks.

[0305] The memory 1002 may also be a computer-readable recording medium, for example, constituted by at least one of a read-only memory (Read Only Memory (ROM)), an erasable programmable read-only memory (Erasable Programmable ROM (EPROM)), an electrically erasable programmable read-only memory (Electrically EPROM (EEPROM)), a random access memory (Random Access Memory (RAM)), and other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store a program (program code), software module, etc. executable for implementing the wireless communication method according to an embodiment of the present disclosure.

[0306] The storage 1003 may also be a computer-readable recording medium, for example, constituted by at least one of a flexible disc, a floppy (registered trademark) disc, an optical disc (e.g., a compact disc (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disc, a Blu-ray (registered trademark) disc, a removable disc, a hard disk drive, a smart card, a flash device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0307] The communication device 1004 is hardware (a transmitting and receiving device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. In order to implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-described transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be physically or logically separated and implemented by a transmitting unit 120a (220a) and a receiving unit 120b (220b).

[0308] 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 an 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 an output to the outside. In addition, the input device 1005 and the output device 1006 may also have an integrated structure (e.g., a touch panel).

[0309] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be constituted by a single bus or may be constituted by different buses between each device.

[0310] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), etc., and a part or all of each functional block may also be implemented by this hardware. For example, the processor 1001 may also be implemented using at least one of these hardwares.

[0311] (Modification example)

[0312] In addition, the terms described in this disclosure and the terms required for understanding this disclosure may also be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal can also be abbreviated as RS, and can also be referred to as a pilot, a pilot signal, etc. according to the applied standard. In addition, a component carrier (Component Carrier (CC)) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0313] A radio frame may also be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) independent of the numerology.

[0314] Here, the numerology may also be a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the numerology may also represent at least one of a subcarrier spacing (SubCarrier Spacing (SCS)), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (Transmission Time Interval (TTI)), the number of symbols per TTI, a radio frame structure, a specific filter process performed by a transmitter-receiver in the frequency domain, a specific windowing process performed by a transmitter-receiver in the time domain, etc.

[0315] A time slot may also be composed of one or more symbols (orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing (OFDM)) symbols, single carrier frequency division multiple access (Single Carrier Frequency Division Multiple Access (SC-FDMA)) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on the numerology.

[0316] A time slot may also include a plurality of mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of a smaller number of symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0317] A radio frame, subframe, time slot, mini-slot, and symbol all represent time units when transmitting signals. A radio frame, subframe, time slot, mini-slot, and symbol can also use their respective other names. In addition, time units such as frames, subframes, time slots, mini-slots, and symbols in the present disclosure can also be replaced with each other.

[0318] For example, a subframe can also be referred to as a TTI, multiple consecutive subframes can also be referred to as a TTI, a time slot or a mini-slot can also be referred to as a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in existing LTE, can also be a period shorter than 1 ms (e.g., 1 - 13 symbols), and can also be a period longer than 1 ms. In addition, the unit representing a TTI can also not be referred to as a subframe, but as a time slot, mini-slot, etc.

[0319] Here, a TTI, for example, refers to the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in units of TTI for each user terminal. In addition, the definition of a TTI is not limited to this.

[0320] A TTI can also be a transmission time unit for data packets (transport blocks), code blocks, codewords, etc. that have undergone channel coding, and can also become a processing unit for scheduling, link adaptation, etc. In addition, when a TTI is given, the time interval (e.g., number of symbols) in which a transport block, code block, codeword, etc. is actually mapped can also be shorter than the TTI.

[0321] In addition, when a time slot or a mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-slots) can also become the minimum time unit for scheduling. In addition, the number of time slots (number of mini-slots) constituting the minimum time unit of this scheduling can also be controlled.

[0322] A TTI having a time length of 1 ms can also be referred to as a normal TTI (TTI in 3GPP Rel.8 - 12), standard TTI, long TTI, normal subframe, standard subframe, long subframe, time slot, etc. A TTI shorter than a normal TTI can also be referred to as a shortened TTI, short TTI, partial TTI, shortened subframe, short subframe, mini-slot, sub-time slot, time slot, etc.

[0323] In addition, a long TTI (e.g., a normal TTI, subframe, etc.) can also be replaced with a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) can also be replaced with a TTI having a TTI length less than that of the long TTI and a TTI length of 1 ms or more.

[0324] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may also include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, it may also be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0325] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a time slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks respectively.

[0326] In addition, one or more RBs may also be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0327] In addition, a resource block may also be composed of one or more resource elements (REs). For example, one RE may also be a radio resource area of a subcarrier and a symbol.

[0328] A bandwidth part (BWP) (which may also be referred to as a partial bandwidth, etc.) may also represent a subset of consecutive common RBs (common resource blocks) used for a certain parameter set in a certain carrier. Here, the common RBs may also be determined by the index of the RBs based on the common reference point of the carrier. A PRB may also be defined in a certain BWP and be additionally numbered within that BWP.

[0329] An UL BWP (BWP for UL) and a DL BWP (BWP for DL) may also be included in a BWP. For a UE, one or more BWPs may also be set within one carrier.

[0330] At least one of the set BWPs may also be active, and the UE may not assume to transmit and receive specific signals / channels outside the active BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0331] In addition, structures such as the above-mentioned radio frames, sub-frames, time slots, mini time slots, and symbols are merely illustrative. For example, the number of sub-frames included in a radio frame, the number of time slots in each sub-frame or radio frame, the number of mini time slots included in a time slot, the symbols included in a time slot or mini time slot, the number of RBs, the number of sub-carriers included in an RB, and the number of symbols, symbol length, Cyclic Prefix (CP) length, etc. within a TTI can be changed in various ways.

[0332] In addition, the information, parameters, etc. described in this disclosure can be represented by absolute values, relative values with respect to a specific value, or can also be represented by corresponding other information. For example, radio resources can also be indicated by a specific index.

[0333] In this disclosure, the names used for parameters, etc. are not restrictive names in all aspects. Furthermore, mathematical expressions, etc. using these parameters can also be different from those clearly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name. Therefore, the various names assigned to these various channels and information elements are not restrictive names in all aspects.

[0334] The information, signals, etc. described in this disclosure can also be represented using any one of various different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0335] In addition, information, signals, etc. can be output in at least one of the following directions: from a higher layer to a lower layer, and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0336] The input and output information, signals, etc. can be stored in a specific location (e.g., a memory), or can be managed using a management table. The input and output information, signals, etc. can be overwritten, updated, or appended. The output information, signals, etc. can also be deleted. The input information, signals, etc. can also be sent to other devices.

[0337] The notification of information is not limited to the manners / embodiments described in the present disclosure, and other methods can also be used. For example, the notification of information in the present disclosure can also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), high layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or combinations thereof.

[0338] In addition, physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling can also be referred to as an RRC message, and for example, it can also be an RRC Connection Setup message, an RRC Connection Reconfiguration (RRC Connection Re - setting) message, etc. In addition, MAC signaling can be notified, for example, by using a MAC Control Element (MAC CE).

[0339] In addition, the notification of specific information (e.g., the notification of "is X") is not limited to explicit notification, and can also be performed implicitly (e.g., by not performing the notification of the specific information, or by the notification of other information).

[0340] The determination can be made by a value represented by one bit (0 or 1), can also be made by a true - false value (boolean value) represented by true or false, and can also be made by a numerical comparison (e.g., comparison with a specific value).

[0341] Software, whether referred to as software, firmware, middleware, micro-code, hardware description language, or by any other name, shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0342] In addition, software, instructions, information, etc. can also be sent and received via a transmission medium. For example, in the case of sending software from a website, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included in the definition of the transmission medium.

[0343] Terms such as "system" and "network" used in this disclosure can be used interchangeably. "Network" can also mean a device (e.g., a base station) included in the network.

[0344] In this disclosure, terms such as "precoding", "precoder", "weights (precoding weights)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel", etc. can be used interchangeably.

[0345] In the present disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, femto cell, pico cell, etc.

[0346] A base station can accommodate one or more (e.g., three) cells. In the case where a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each of the smaller areas can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides communication services within the coverage range.

[0347] In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "user device (User Equipment (UE))", "terminal" can be used interchangeably.

[0348] There are also cases where mobile stations are referred to by terms such as subscriber station, mobile unit, subscriber unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client, or several other suitable terms.

[0349] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), a moving body that moves in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanoid or non-humanoid). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0350] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, for a structure in which communication between a base station and a user terminal is replaced by communication between multiple user terminals (e.g., it may also be referred to as Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.), the various aspects / embodiments of the present disclosure may also be applied. In this case, it may also be configured such that the user terminal 20 has the functions of the above-described base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to inter-terminal communication (e.g., "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0351] Similarly, the user terminal in the present disclosure may also be replaced by a base station. In this case, it may also be configured such that the base station 10 has the functions of the above-described user terminal 20.

[0352] In the present disclosure, an action performed by the base station may sometimes be performed by its upper node according to circumstances. Obviously, in a network including one or more network nodes having a base station, various operations for communicating with a terminal may be performed by the base station, one or more network nodes other than the base station (e.g., considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0353] Each mode / embodiment described in the present disclosure can be used alone, in combination, or switched during execution. In addition, the processing procedures, sequences, flowcharts, etc. of each mode / embodiment described in the present disclosure can be rearranged as long as there is no contradiction. For example, for the methods described in the present disclosure, the elements of various steps are presented in an exemplary order, but are not limited to the specific order presented.

[0354] Each mode / embodiment described in the present disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, the fourth-generation mobile communication system (4G), the fifth-generation mobile communication system (5G), the sixth-generation mobile communication system (6G), the xth-generation mobile communication system (xG) (x is an integer or a decimal, for example), Future Radio Access (FRA), New Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, next-generation systems extended based on them, etc. In addition, multiple systems can also be combined (for example, a combination of LTE or LTE-A and 5G) and applied.

[0355] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0356] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used or that the first element must take precedence over the second element in some form.

[0357] The term "determining" used in this disclosure may include a variety of actions. For example, "determining" may also refer to situations where judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. are considered to be "determining".

[0358] In addition, "judgment (decision)" may also be a situation where receiving (for example, receiving information), sending (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0359] In addition, "judgment (decision)" can also be regarded as a situation where resolving, selecting, choosing, establishing, comparing, etc. are regarded as a situation where "judgment (decision)" is performed. That is, "judgment (decision)" can also be regarded as a situation where some actions are regarded as a situation where "judgment (decision)" is performed.

[0360] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0361] As used in this disclosure, the "maximum transmit power" may refer to the maximum value of the transmit power, or the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0362] As used in this disclosure, terms such as "connected" and "coupled", or all variations thereof, refer to all direct or indirect connections or couplings between two or more elements, and can include the case where there is one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The coupling or connection between elements can be physical, logical, or a combination of them. For example, "connected" can also be replaced with "access".

[0363] In this disclosure, when two elements are connected, it is possible to consider using one or more wires, cables, printed electrical connections, etc., and electromagnetic energy having wavelengths in the radio frequency range, microwave region, optical (both visible and invisible) region, etc., as several non-limiting and non-inclusive examples, and being "connected" or "coupled" to each other.

[0364] In this disclosure, the term "A is different from B" can also mean that "A and B are different from each other". In addition, this term can also mean that "A and B are each different from C". Terms such as "separated" and "coupled" can also be interpreted in the same way as "different".

[0365] When the terms "include", "including", and their variations are used in this disclosure, these terms, like the term "comprising", are meant in an inclusive sense. Further, the term "or" used in this disclosure does not mean the exclusive or.

[0366] In this disclosure, for example, when articles are added through translation such as a, an, and the in English, this disclosure can also include the case where the nouns following these articles are in the plural form.

[0367] As described above, the invention related to the present disclosure has been described in detail. However, for those skilled in the art, the invention related to the present disclosure is obviously not limited to the embodiments described in the present disclosure. The invention related to the present disclosure can be implemented in the form of modifications and changes without departing from the gist and scope of the invention determined based on the description in the claims. Therefore, the description of the present disclosure is for illustrative purposes and does not have any restrictive meaning for the invention related to the present disclosure.

Claims

1. A terminal, comprising: A receiving unit that receives a Media Access Control Control Element (MAC CE) used in activating a Transmission Configuration Indicator (TCI) state, where the MAC CE includes: A 1-bit field indicating whether to apply the TCI state represented by the MAC CE to the physical downlink shared channel PDSCH or to the physical uplink shared channel PUSCH; A control resource set pool index CORESET pool ID field set with a first value corresponding to one of the multiple transmit-receive points TRPs or a second value corresponding to other TRPs of the multiple TRPs; And A control unit, (1) When the 1-bit field of the received MAC CE indicates application to the PUSCH, The MAC CE with the CORESET pool ID field being the first value activates the following TCI state: the TCI state used in the transmission of the first PUSCH with the CORESET pool ID equal to the first value among the multiple PUSCHs scheduled by multiple DCIs, The MAC CE with the CORESET pool ID field being the second value activates the following TCI state: the TCI state used in the transmission of the second PUSCH with the CORESET pool ID equal to the second value among the multiple PUSCHs scheduled by multiple DCIs, (2) When the 1-bit field of the received MAC CE indicates application to the PDSCH, the MAC CE activates the TCI state used in receiving the PDSCH scheduled by the DCI.

2. The terminal according to claim 1, wherein The MAC CE includes a field indicating the TCI state with 7 bits.

3. The terminal according to claim 1, wherein The terminal further includes: A transmission unit that transmits capability information based on the support of the terminal indicating the MAC CE.

4. The terminal according to claim 1, wherein When the TCI state of the serving cell is activated by the MAC CE, the control unit applies the operation of simultaneously activating the TCI state to multiple TRPs in all component carriers CC within the applicable list identical to the serving cell.

5. A wireless communication method of a terminal, comprising: Steps of receiving a media access control control element (MAC CE) used in activating a transmission configuration indication (TCI) state, the MAC CE including: A 1-bit field indicating whether to apply the TCI state represented by the MAC CE to the physical downlink shared channel PDSCH or to the physical uplink shared channel PUSCH; A control resource set pool index CORESET pool ID field set with a first value corresponding to one of the multiple transmit-receive points TRPs or a second value corresponding to other TRPs of the multiple TRPs; And (1) When the 1-bit field of the received MAC CE indicates application to the PUSCH, The MAC CE with the CORESET pool ID field being the first value activates the following TCI state: the TCI state used in the transmission of the first PUSCH with the CORESET pool ID equal to the first value among the multiple PUSCHs scheduled by multiple DCIs, The MAC CE with the CORESET pool ID field having the second value activates the following TCI state: in multiple PUSCHs scheduled by multiple DCIs, the TCI state used in the transmission of the second PUSCH with the CORESET pool ID equal to the second value. (2) When the 1-bit field of the received MAC CE indicates application to the PDSCH, the step of activating, by the MAC CE, the TCI state used in receiving the PDSCH scheduled by DCI.

6. A base station having: A sending unit that sends a Media Access Control Control Element (MAC CE) used in activating a Transmission Configuration Indicator (TCI) state, where the MAC CE includes: A 1-bit field indicating whether the TCI state represented by the MAC CE is applied to the physical downlink shared channel PDSCH or the physical uplink shared channel PUSCH; a control resource set pool index CORESET pool ID field set with a first value corresponding to one of multiple transmit receive points TRPs or a second value corresponding to other TRPs among the multiple TRPs; and A control unit (1) When the 1-bit field of the transmitted MAC CE indicates application to the PUSCH, Performs control so that the MAC CE with the CORESET pool ID field having the first value activates the following TCI state: in multiple PUSCHs scheduled by multiple DCIs, the TCI state used in the transmission from the terminal of the first PUSCH with the CORESET pool ID equal to the first value. Performs control so that the MAC CE with the CORESET pool ID field having the second value activates the following TCI state: in multiple PUSCHs scheduled by multiple DCIs, the TCI state used in the transmission from the terminal of the second PUSCH with the CORESET pool ID equal to the second value. (2) When the 1-bit field of the transmitted MAC CE indicates application to the PDSCH, performs control so that the MAC CE activates the TCI state used in the terminal for receiving the PDSCH scheduled by DCI.

7. A system including a terminal and a base station, The terminal has: A receiving unit that receives a Media Access Control Control Element (MAC CE) used in activating a Transmission Configuration Indicator (TCI) state, where the MAC CE includes: A 1-bit field indicating whether the TCI state represented by the MAC CE is applied to the physical downlink shared channel PDSCH or the physical uplink shared channel PUSCH; a control resource set pool index CORESET pool ID field set with a first value corresponding to one of multiple transmit receive points TRPs or a second value corresponding to other TRPs among the multiple TRPs; And A control unit (1) When the 1-bit field of the received MAC CE indicates application to the PUSCH, The MAC CE with the CORESET pool ID field having the first value activates the following TCI state: in multiple PUSCHs scheduled by multiple DCIs, the TCI state used in the transmission of the first PUSCH with the CORESET pool ID equal to the first value. The TCI state as follows is activated by the MAC CE with the CORESET pool ID field being the second value: among multiple PUSCHs scheduled by multiple DCIs, the TCI state used in the transmission of the second PUSCH with the CORESET pool ID equal to the second value, (2) When the 1-bit field of the received MAC CE indicates application to the PDSCH, the TCI state used in receiving the PDSCH scheduled by the DCI is activated by the MAC CE, The base station has: a transmission unit that transmits the MAC CE.

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