Terminal, base station, system and wireless communication method

Abstract

A terminal according to one embodiment of the present disclosure includes: a receiving unit for receiving a media access control element (MAC CE) for a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH); and a control unit for applying one or more transmission configuration indication states (TCI states) indicated by the MAC CE to at least one of the PDSCH and the PUSCH. According to one embodiment of the present disclosure, a beam 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 the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) is standardized for the purpose of further high-speed data rate, low latency, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) is standardized for the purpose of further increasing the capacity and sophistication of LTE (Release (Rel.) 8, 9)).

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

[0004] Prior art literature

[0005] Non-patent literature

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

[0007] Problems to be solved by the invention

[0008] In future wireless communication systems (e.g., NR), user terminals (terminal, user terminal, User Equipment (UE)) use beams (transmission configuration indication (TCI) state / quasi co-location (QCL) assumption) to control transmission and reception.

[0009] However, there is a concern that the delay / overhead in indicating beams for downlink (DL) / uplink (UL) may reduce 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 a beam.

[0011] Means for solving problems

[0012] A terminal involved in one method of the present disclosure comprises: a receiving unit, which receives a media access control-control element (MAC CE) for a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH); and a control unit, which applies one or more transmission setting indication states (TCI states) represented by the MAC CE to at least one of the PDSCH and the PUSCH.

[0013] Effects of the Invention

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

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

[0016] Figure 2 It is a diagram showing an example of activating / deactivating MAC CE with extended TCI state for UE-specific PDSCH.

[0017] Figure 3A as well as Figure 3B This is a diagram showing an example of MAC CE of notification method 1-1.

[0018] Figure 4A as well as Figure 4B This is a diagram showing an example of MAC CE of notification method 1-2.

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

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

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

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

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

[0024] Fig. 10A as well as Fig. 10B This is a diagram showing an example of a modification of the third embodiment.

[0025] Fig.11 It is a diagram showing an example of the fourth embodiment.

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

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

[0028] Fig.14 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0029] Fig.15 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION

[0030] (TCI, spatial relationship, QCL)

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

[0032] The TCI state may also represent the state of a signal / channel applied to a downlink. A state equivalent to the TCI state of a signal / channel applied to an uplink may also be expressed as a spatial relation.

[0033] The TCI state is information related to Quasi-Co-Location (QCL) of signals / channels, and may also be referred to as spatial reception parameters, spatial relationship information, etc. The TCI state may be set for each channel or each signal to the UE.

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

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

[0036] Regarding QCL, multiple types (QCL types) may also be specified. For example, four QCL types AD may be set, and the parameters (or parameter sets) that can be assumed to be the same in the four QCL types AD are different. The parameters (also referred to as QCL parameters) are expressed as follows:

[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 parameters.

[0041] The situation in which 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 called QCL assumption.

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

[0043] The TCI state may be, for example, information related to the QCL between the channel being the object (in other words, the reference signal (RS) used for the channel) and other signals (for example, other RS). The TCI state may also be set (indicated) by high-layer signaling, physical layer signaling, or a combination thereof.

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

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

[0046] In addition, the RS that is in a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (SynchronizationSignal Block (SSB)), a channel state information reference signal (Channel StateInformation ReferenceSignal (CSI-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called QRS).

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

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

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

[0050] In RRC connection mode, in both the case where the TCI information in the DCI (high-layer parameter TCI-PresentInDCI) 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 (DCI that schedules the PDSCH) and the corresponding PDSCH (the PDSCH scheduled by the DCI) is less than the threshold (timeDurationForQCL) (application condition, first condition), if in the case of non-cross-carrier scheduling, the TCI state of the PDSCH (default TCI state) may also be the TCI state of the lowest CORESET ID in the latest time slot in the activated DL BWP of the CC (specific UL signal). In other cases, the TCI state of the PDSCH (default TCI state) may also be the TCI state of the lowest TCI state ID of the PDSCH in the activated DL BWP of the scheduled CC.

[0051] In Rel. 15, separate MAC CEs for activation / deactivation of PUCCH spatial relation and MAC CE for activation / deactivation of SRS spatial relation are required. PUSCH spatial relation follows SRS spatial relation.

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

[0053] If both the spatial relationship and PL-RS for PUCCH are not set in FR2 (application condition, second condition), the default assumption of spatial relationship and PL-RS (default spatial relationship and default PL-RS) is applied to PUCCH. If both the spatial relationship and PL-RS for SRS (SRS resources for SRS or SRS resources corresponding to the SRS resource indicator (SRI) in DCI format 0_1 ​​that schedules PUSCH) are not set in FR2 (application condition, second condition), the default assumption of spatial relationship and PL-RS (default spatial relationship and default PL-RS) is applied to PUSCH and SRS scheduled by DCI format 0_1.

[0054] If CORESET is set in the activated DL BWP on the CC, the default spatial relationship and default PL-RS may also be the TCI state or QCL assumption of the CORESET with the lowest CORESET ID in the activated DL BWP. If CORESET is not set in the activated DL BWP on the CC, the default spatial relationship and default PL-RS may also be the activated TCI state with the lowest ID of the PDSCH in the activated DL BWP.

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

[0056] In Rel.16, the PUCCH setting 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 activated PUCCH spatial relationship or no PUCCH resources on the activated UL BWP in the CC (application condition, second condition), the default spatial relationship and default PL-RS are applied in the PUSCH.

[0057] The above-mentioned threshold may also be referred to as the time length for QCL (duration (time duration)), "timeDurationForQCL", "threshold (Threshold)", "threshold for offset between aDCI indicating a TCIstate and a PDSCH scheduled by the DCI" (Threshold for offset between aDCI indicating a TCIstate and a PDSCH scheduled by the DCI)", "Threshold-Sched-Offset", scheduling (schedule) offset threshold, scheduling (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 codebook transmission / non-codebook transmission purposes).

[0059] (Multiple TRP)

[0060] In NR, one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi TRP (multi TRP (MTRP))) using one or more panels (multi-panels) to perform DL transmission to the UE is being studied. In addition, the UE is studying the use of one or more panels to perform UL transmission to one or more TRPs.

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

[0062] Multiple TRPs (for example, TRP#1, #2) can also be connected through an ideal / non-ideal backhaul and exchange information, data, etc. Different code words (Code Words (CW)) and different layers can also be sent from each TRP of the multiple TRPs. As a method of sending multiple TRPs, non-coherent joint transmission (NCJT) can also be used.

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

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

[0065] It is also conceivable that the first PDSCH and the second PDSCH are not in a quasi-co-location (QCL) relationship (not quasi-co-located). The reception of multiple PDSCHs may also be replaced by the simultaneous reception of PDSCHs that are not of a certain QCL type (eg, QCL type D).

[0066] Multiple PDSCHs from multiple TRPs (also referred to as multiple PDSCHs) can also be scheduled using one DCI (single DCI, single PDCCH) (single-primary mode). Multiple PDSCHs from multiple TRPs can also be scheduled separately using multiple DCIs (multiple DCIs, multiple PDCCHs) (multiple-primary mode).

[0067] Based on such a multi-TRP scenario, more flexible transmission control using channels of good quality can be performed.

[0068] In order to support the transmission of multiple TRPs 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 setting information for linking multiple pairs of PDCCHs and PDSCHs with multiple TRPs, a control resource set (CORESET) in the PDCCH setting 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 being studied.

[0071] Figure 1 The UE-specific PDSCH TCI state activation / deactivation MAC CE (TCI StatesActivation / Deactivation for UE-specific PDSCH MAC CE) contains the CORESET pool ID field, the serving cell ID field, the BWP ID field and the T i field.

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

[0073] This MAC CE is used for PDSCH reception of multiple TRPs based on multiple DCIs, and PDSCH reception of a single TRP.

[0074] Figure 2 The UE-specific PDSCH MAC CE with enhanced TCI states activation / deactivation includes a reserved (R) field (reserved bit), a serving cell ID field, a BWP ID field, and a C i Field and TCI Status IDi,j field.

[0075] C i The field indicates whether there is a TCI status ID i,2 The octet of the field. TCI Status ID i,j The field indicates the jth TCI state indicated for the i-th code point within the TCI field of the DCI. The TCI code point to which the TCI state is mapped is indicated by a TCI state ID. i,j The set of fields representing the sequential position of all TCI code points is determined.

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

[0077] UE-specific PDSCH uses TCI state to activate / deactivate MAC CE ( Figure 1 ) and UE-specific PDSCH with extended TCI state activation / deactivation MAC CE ( Figure 2 ) can be called Rel.16 MAC CE or TCI state MAC CE for PDSCH.

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

[0079] In addition to RRC signaling, MAC CE can also be used in activation / deactivation of SRS, PUCCH, and spatial relationship information of SRS. L1 signaling (DCI) can also be used in dynamic indication (spatial relationship information) for at least one of aperiodic (aperiodic (A))-SRS, PUSCH, PRACH, and PUCCH. New fields in the DCI format can also be used in dynamic indication for PDCCH-indicated (PDCCH-ordered) PRACH. New fields in the DL grant can also be used in dynamic indication for PUCCH.

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

[0081] However, there is a concern that the delay / overhead in indicating beams for downlink (DL) / uplink (UL) may reduce communication quality / throughput.

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

[0083] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The structures described in the respective embodiments may be applied individually or in combination.

[0084] In the present disclosure, "A / B", "at least one of A and B" may also be replaced with each other. In the present disclosure, cell, CC, carrier, BWP, DL BWP, UL BWP, activated DL BWP, activated UL BWP, and band may also be replaced with each other. In the present disclosure, index, ID, indicator, and resource ID may also be replaced with each other. In the present disclosure, RRC, RRC parameter, RRC message, high-layer parameter, information element (IE), and setting may also be replaced with each other. In the present disclosure, support, control, controllable, operation, and operation may also be replaced with each other.

[0085] In the present disclosure, activate, update, indicate, enable, and specify may also be used interchangeably.

[0086] In the present disclosure, MAC CE, update command, and activation / deactivation command may also be replaced with each other.

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

[0088] MAC signaling may also use, for example, MAC Control Element (MACCE), MAC Protocol Data Unit (MAC Protocol Data Unit (PDU)), etc. Broadcast information may also be, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

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

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

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

[0092] In the present disclosure, panel, uplink (UL) transmission entity, TRP, spatial relationship, control resource set (CORESET), PDSCH, codeword, base station, antenna port of a certain signal (for example, demodulation reference signal (DMRS)) port), antenna port group of a certain signal (for example, DMRS port group), group for multiplexing (for example, 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, TRP ID can also be replaced with TRP.

[0093] In the present disclosure, a UE with multiple TRPs set can also determine at least one of the TRPs 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 (for example, a field specifying the TRP, an antenna port field, a PRI).

[0095] DMRS corresponding to the scheduled PDSCH / PUSCH (for example, the DMRS sequence, resources, CDM group, DMRS port, DMRS port group, antenna port group, etc.).

[0096] · The DMRS corresponding to the PDCCH on which the DCI is transmitted (for example, the sequence, resources, CDM group, DMRS port, DMRS port group, etc. of the DMRS).

[0097] The CORESET that received the DCI (e.g., the CORESET pool ID of the CORESET, the ID of the CORESET, the scrambling ID (which may also be replaced by a sequence ID), resources, etc.).

[0098] RS (RS related groups, etc.) used for TCI status, QCL assumptions, 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 multiple 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 when multiple TRPs utilize an ideal backhaul. It is also conceivable that multiple PDCCHs are supported when multiple TRPs utilize a non-ideal backhaul.

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

[0102] In the present disclosure, multiple TRPs, multiple TRP systems, multiple TRP transmissions, and multiple PDSCHs may also be replaced with each other. In the present disclosure, single DCI, single PDCCH, multiple TRP systems based on single DCI, two TCI states activated on at least one TCI code point, and one DCI associated with two TCI states may also be replaced with each other. In the present disclosure, multiple DCI, multiple PDCCH, multiple TRP systems based on multiple DCIs, (for CORESET) CORESET pool indexes are set, and two DCIs are associated with two TCI states may also be replaced with each other. Single TRP, single TRP system, single TRP transmission, single PDSCH, TCI code points that are not associated with more than two TCI states and are not set with CORESET pool indexes may also be replaced with each other.

[0103] (Wireless Communication Method)

[0104] <First embodiment>

[0105] Different MAC CEs may also be used for the PDSCH TCI state and the PUSCH TCI state. A new MAC CE for PUSCH TCI state activation may also be introduced. The new MAC CE may also have a new 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. Notification methods 1-1 to 1-3 may also be the same MAC CE, and at least one of notification methods 1-1 to 1-3 may also be different from other MAC CEs. Single TRPPUSCH transmission may also be PUSCH transmission using the mechanism of Rel.15.

[0107] 《Notification Method 1-1》

[0108] The new MAC CE can also be a MAC CE for sending a single TRP PUSCH.

[0109] For single TRP PUSCH transmission, 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 point 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 TCI states activated may be 2, 4, 8, or other numbers.

[0111] [Example 1]

[0112] exist Figure 3A In the example, the MAC CE contains the R field, the serving cell ID field, the BWP ID field, and the T i field.

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

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

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

[0116] [Example 2]

[0117] exist Figure 3BIn the example, MAC CE contains R field, serving cell ID field, BWP ID field and TCI state ID i field.

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

[0119] 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 may also be other numbers. For example, the maximum number of UL TCI states may also be 128, and the TCI state ID field may also be 7 bits.

[0120] 《Notification Method 1-2》

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

[0122] The new MAC CE may also follow any of the following options 1 and 2.

[0123] [Option 1]

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

[0125] Other features may also be the same as notification method 1-1.

[0126] [Example 1]

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

[0128] [Example 2]

[0129] exist Figure 4B In the example, MAC CE contains CORESET pool ID field, serving cell ID field, BWP ID field, R field and TCI state ID i field.

[0130] [Option 2]

[0131] The new MAC CE may also reuse notification method 1-1. In this case, the same set of TCI states may be activated for PUSCHs scheduled by different CORESET pool IDs.

[0132] 《Notification Method 1-3》

[0133] The new MAC CE can also be a MAC CE for sending multiple TRP PUSCH based on a single DCI.

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

[0135] Each combination may also include Y TCI states. A combination of TCI states may also be used in PUSCH transmission based on multiple TRPs. Here, each TCI state may also correspond to PUSCH transmission to each TRP.

[0136] The maximum number of activated combinations of TCI states 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.

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

[0138] exist Figure 5 In the example, MAC CE includes R field, serving cell ID field, BWP ID field, C i Field and TCI Status ID i,j field.

[0139] C i The field indicates whether there is a TCI status ID i,2 The octet of the field. TCI Status ID i,1 Field and TCI Status ID i,2 The field may also indicate the TCI state of code point (i) that is activated and mapped to 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 may also be other numbers. For example, the maximum number of UL TCI states may also be 128, and the TCI state ID field may also 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 may 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 may also be used in TCI state activation / deactivation applied to both PDSCH and PUSCH.

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

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

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

[0148] 《Notification Method 2-1》

[0149] For single TRP PUSCH transmission, UE-specific PDSCH uses TCI state to activate / deactivate MACCE ( Figure 1 ) can also be reused.

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

[0151] When the number of TCI states configured for PUSCH is smaller than the number of TCI states configured for PDSCH, the first X T i The field may also be applied to PUSCH. X may also be the number of TCI states configured for 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 TCI states set to 1 i The field may also indicate the TCI state activated for PUSCH. X may also be the maximum number of TCI states activated for PUSCH.

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

[0154] 《Notification Method 2-2》

[0155] For multi-TRP PUSCH transmission based on multi-DCI, UE-specific PDSCH uses TCI state to activate / deactivate MAC CE ( Figure 1 ) can also be reused. Other features can also be the same as notification method 2-1.

[0156] MAC CE may also follow either of the following options 1 and 2.

[0157] [Option 1]

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

[0159] [Option 2]

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

[0161] [change]

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

[0163] MAC CE may also contain a P field. In the case where the P field is set to 1, there may also be a T i The second set of fields. In this case, T i The second set of fields may not be present.

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

[0165] 《Notification Method 2-3》

[0166] For single TRP PUSCH transmission, UE-specific PDSCH uses extended TCI state to activate / deactivate MAC CE ( Figure 2 ) can also be reused.

[0167] MAC CE may also follow either of the following options 1 and 2.

[0168] [Option 1]

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

[0170] In the case where the maximum number of TCI states activated for PUSCH is less than the number of TCI state pairs activated for PDSCH, the first X TCI state IDs i,1 The field may also be applied for PUSCH. X may also be the maximum number of TCI states activated for PUSCH.

[0171] exist Fig. 8A In the example, the TCI status ID 0,1 The field is applied to PUSCH and is mapped to code point 0. TCI State ID 1,1 The field is applied to PUSCH and is mapped to code point 1.

[0172] [Option 2]

[0173] TCI Status ID i,jThe field may also indicate the (jth) TCI state that is activated and mapped to 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 for PUSCH. X may also be the maximum number of TCI states activated for PUSCH.

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

[0176] 《Notification Method 2-4》

[0177] For multi-TRP PUSCH transmission based on multi-DCI, UE-specific PDSCH uses extended TCI state to activate / deactivate MACCE ( Figure 2 ) can also be reused.

[0178] [Option 1]

[0179] TCI Status ID i,1 Field and TCI Status ID i,2 The field indicates the TCI state of the code point (i) that is activated and mapped to the DCI field indicating the TCI state for PUSCH.

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

[0181] 《Notification Method 2-5》

[0182] The size (number of bits) of the field for UL-TCI state indication in the UL grant DCI may also depend on the number of TCI states for specific purposes. The TCI state for specific purposes may also be activated by MACCE. The TCI state for specific purposes may also be at least one of the activated UL TCI state and the DLTCI state for 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 specific purposes activated in the MAC CE is N, the number of bits of the field used for the UL-TCI state indication may also be ceil(log2(N)).

[0184] <<Variation 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 PDSCH and PUSCH.

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

[0187] The following scenarios 1 and 2 may also be supported, and which of the following scenarios 1 and 2 is supported may also be set through high-layer signaling.

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

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

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

[0191] <Third embodiment>

[0192] The same MAC CE may also be used in TCI state activation / deactivation for PDSCH and PUSCH. Whether the MAC CE is applied to PDSCH or PUSCH may also be based on a 1-bit indication in the MAC CE.

[0193] The Rel.16 MAC CE for PDSCH TCI activation can also be reused. The indication in the MAC CE can also be applied to either PDSCH or PUSCH based on a 1-bit indication.

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

[0195] In the case where this bit is set to 0, MAC CE may also be applied to PDSCH. In the case where this bit is set to 1, MAC CE may also be applied to PUSCH, and the UE operation in the second embodiment may also be applied to PUSCH.

[0196] Activate / deactivate MAC CE with extended TCI state for UE-specific PDSCH ( Figure 2 ), an R field can also be used as an identifier of PDSCH or PUSCH. In the case where the bit of the R field is set to 0, MAC CE can also be applied to PDSCH. In the case where the bit is set to 1, MAC CE can also be applied to PUSCH, and the UE operation in notification method 2-3 / 2-4 can also be applied to PUSCH.

[0197] exist Fig. 9 In the example, the initial R field in the UE-specific PDSCH extended TCI state activation / deactivation MAC CE can also be used as an identifier of PDSCH or PUSCH.

[0198] <<Variation of the Third Embodiment>>

[0199] Activate / deactivate MAC CE with TCI status on UE-specific PDSCH ( Figure 1 ), the R field is not used, therefore, the MAC CE may not be reused, but a new MAC CE may be defined.

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

[0201] Based on the content of the MAC CE in any one of the notification methods 2-1 to 2-4 and the UE operation, 1 bit in the MAC CE may also indicate which of the PDSCH and the PUSCH the MAC CE is applied to. When this bit is set to 0, the MAC CE may also be applied to the PDSCH. When this bit is set to 1, the MAC CE may also be applied to the PUSCH, and the UE operation in any one of the notification methods 2-1 to 2-4 may also be applied to the PUSCH.

[0202] [Example 1]

[0203] exist Fig. 10A In the example of , a 1-bit X field may also be introduced into the new MAC CE based on the notification method 2-1 / 2-2. The X field may also be an identifier of the PDSCH or PUSCH.

[0204] [Example 2]

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

[0206] Different LCIDs may also be used for the new MAC CE and Rel.16 MAC CE.

[0207] The following scenarios 1 and 2 may also be supported, and which of the following scenarios 1 and 2 is supported may also be set through high-layer signaling.

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

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

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

[0211] <Fourth embodiment>

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

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

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

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

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

[0217] According to the fourth embodiment described 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 a MAC CE for PUSCH TCI state activation is supported may be specified. 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, whether the MAC CE for PUSCH TCI state activation is valid may be set by an RRC parameter (IE). 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 simultaneous PUSCH TCI state activation across multiple CCs / BWPs is supported may also be specified. The fourth embodiment may be applied only when the corresponding UE capability is reported.

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

[0223] (Wireless Communication System)

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

[0225] Fig.12 1 is a diagram showing an example of a schematic structure of a wireless communication system involved in one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), and the like.

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

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

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

[0229] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as base stations 10.

[0230] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0231] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to these. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0232] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

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

[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 also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0235] The user terminal 20 may also be a terminal that supports at least one of communication modes 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) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. may be used.

[0237] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the radio access schemes for UL and DL.

[0238] As downlink channels, the wireless communication system 1 may use a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc.

[0239] In addition, as uplink channels, the wireless communication system 1 may use an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH))), a random access channel (Physical Random Access Channel (PRACH)), etc.

[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, master information block (MIB) can also be transmitted through PBCH.

[0241] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

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

[0243] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space setting.

[0244] A search space may also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be interchangeable.

[0245] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (Scheduling Request (SR)) can also be transmitted via PUCCH. The random access preamble used to establish a connection with a cell can also be transmitted via PRACH.

[0246] In the present disclosure, downlink, uplink, etc. may be expressed without the word “link.” In addition, various channels may be expressed without the word “physical” at the beginning.

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

[0248] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SSB), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0249] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS))), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0250] (Base Station)

[0251] Fig.13 1 is a diagram showing an example of a structure of a base station involved in one embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may each be provided with more than one.

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

[0253] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

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

[0255] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0256] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0257] The transmitting / receiving antenna 130 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0258] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

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

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

[0261] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (Discrete Fourier Transform (DFT)) processing (as needed), inverse fast Fourier transform (Inverse Fast Fourier Transform (IFFT)) processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0262] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0263] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0264] The sending and receiving unit 120 (receiving processing unit 1212) can also apply analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to obtain user data, etc.

[0265] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (Radio Resource Management (RRM)) measurement, channel state information (CSI) measurement, etc. based on the received signal. The measuring unit 123 may also measure the received power (e.g., reference signal received power (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (Received Signal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement result may also be output to the control unit 110.

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

[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 and reception unit 120 , the transmission and reception antenna 130 , and the transmission path interface 140 .

[0268] The transmitting and receiving 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 a physical downlink shared channel (PDSCH), and may also send a second MAC CE indicating one or more second TCI states activated for a physical uplink shared channel (PUSCH). The control unit 110 may also control the reception of the PUSCH to which the one or more second TCI states indicated by the second MAC CE are applied.

[0269] The transmitting and receiving unit 120 may also transmit 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 110 may also apply one or more transmission configuration indication (TCI) states indicated by the MAC CE to at least one of the PDSCH and the PUSCH.

[0270] (User Terminal)

[0271] Fig.14 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. In addition, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided with one or more.

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

[0273] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

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

[0275] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0276] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0277] The transmitting / receiving antenna 230 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0278] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0279] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

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

[0281] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0282] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is valid (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0283] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0284] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230 .

[0285] The sending and receiving unit 220 (receiving processing unit 2212) can also apply analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

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

[0287] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 , the transmitting and receiving antenna 230 , and the transmission path interface 240 .

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

[0289] The receiving unit may also receive the second MAC CE when the control resource set pool index is not set and a code point for the TCI state in the downlink control information is not associated with multiple TCI states.

[0290] When more than one control resource set pool index is set, the receiving unit may also receive the second MAC CE.

[0291] In the case where one code point for the TCI state in the downlink control information is associated with multiple 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 configuration indication (TCI) states represented by the MAC CE to at least one of the PDSCH and the PUSCH.

[0293] The receiving unit may also receive the MAC CE when 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.

[0294] In the case where more than one control resource set pool index is set, the receiving unit may also receive the MAC CE.

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

[0296] (Hardware Structure)

[0297] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly (for example, by wired, wireless, etc.) connected and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0298] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method is not particularly limited.

[0299] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.15 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0300] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. can be used interchangeably. The hardware structure of the base station 10 and the user terminal 20 can be configured to include one or more of the devices shown in the figure, or to exclude some of the devices.

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

[0302] The functions of the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0303] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), the sending and receiving unit 120 (220), etc. may also be implemented by the processor 1001.

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

[0305] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

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

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

[0308] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0309] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[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), and a field programmable gate array (FPGA), and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0311] (Variation Example)

[0312] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the standard applied. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0313] A wireless frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a wireless frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

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

[0315] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

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

[0317] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be interchangeable.

[0318] For example, a subframe may be referred to as a TTI, a plurality of consecutive subframes may be referred to as a TTI, and a time slot or a mini time slot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may be referred to as a time slot, a mini time slot, etc. instead of a subframe.

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

[0320] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

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

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

[0323] In addition, a long TTI (e.g., normal TTI, subframe, etc.) may be replaced by a TTI having a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) may be replaced by a TTI having a TTI length shorter than that of the long TTI and longer than 1 ms.

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

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

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

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

[0328] Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) can also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a certain carrier. Here, common RBs can also be identified by the index of the RB based on the common reference point of the carrier. PRBs can also be defined in a BWP and numbered within the BWP.

[0329] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured in one carrier.

[0330] At least one of the configured BWPs may be activated, and the UE may not assume that it transmits or receives a specific signal / channel other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0331] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0332] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0333] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not limiting in all respects.

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

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

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

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

[0338] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (Layer 1 / Layer 2 (L1 / L2)) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, for example, an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MAC Control Element (CE)).

[0339] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0340] The determination can be made by a value represented by a bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a specific value).

[0341] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

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

[0343] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

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

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

[0346] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0347] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

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

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

[0350] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0351] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

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

[0353] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, sequences, flow charts, etc. of the various methods / implementations described in this disclosure may be reversed in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

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

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

[0362] The terms "connected", "coupled", or all their variations used in this disclosure refer to all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be replaced by "access".

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

[0364] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same way as "different".

[0365] When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms have an inclusive meaning, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not have an exclusive OR meaning.

[0366] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0367] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: A receiving unit, receiving a medium access control element (MAC CE) used in sending an activation of a setting indication state (TCI state); and a control unit, applying the TCI state indicated by the MAC CE to at least one of a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH), The control unit controls, based on a value of a 1-bit field of the MAC CE, to apply the TCI state of the MAC CE to the PDSCH or to the PUSCH, The MAC CE includes a field indicating whether a second TCI state exists in the code point, The control unit will apply the operation of activating the TCI state in all component carriers, i.e., CCs, in the same applicable list as the serving cell when the TCI state of the serving cell is activated through the MAC CE to multiple transmission / reception points, i.e., multiple TRPs.

2. The terminal according to claim 1, wherein: The MAC CE includes a field that is 7 bits and indicates the TCI status.

3. The terminal according to claim 1, wherein: The terminal further includes a sending unit, which sends capability information indicating that the terminal supports the MAC CE.

4. The terminal according to claim 1, wherein: The MAC CE includes a CORESETpoolIndex field.

5. A wireless communication method of a terminal, comprising: A receiving step, a step of receiving a medium access control element (MAC CE) used in sending an activation of a setting indication state (TCI state); and an application step, applying the TCI state indicated by the MAC CE to at least one of a physical downlink shared channel, i.e., a PDSCH, and a physical uplink shared channel, i.e., a PUSCH, In the applying step, based on the value of a 1-bit field of the MAC CE, controlling the TCI state of the MAC CE to be applied to the PDSCH or to the PUSCH, The MAC CE includes a field indicating whether a second TCI state exists in the code point, In the application step, when the TCI state of the service cell is activated through the MAC CE, the operation of activating the TCI state in all component carriers, i.e., CCs, in the same applicable list as the service cell is applied to multiple transmission / reception points, i.e., multiple TRPs.

6. A base station, comprising: a sending unit, sending a medium access control element (MAC CE) used in sending activation of a setting indication state (TCI state); and a control unit for controlling transmission and reception of at least one of a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH) to which the TCI state indicated by the MAC CE is applied, The control unit controls the TCI state of the MAC CE to be applied to the PDSCH or to be applied to the PUSCH based on the value of the 1-bit field of the MAC CE, The MAC CE includes a field indicating whether a second TCI state exists in the code point, In the case where the control unit activates the TCI state of the serving cell through the MAC CE, the operation of activating the TCI state in all component carriers, i.e., CCs, in the same applicable list as the serving cell is applied to multiple transmission / reception points, i.e., multiple TRPs.

7. A system comprising a terminal and a base station, The terminal has: A receiving unit, receiving a medium access control element (MAC CE) used in sending an activation of a setting indication state (TCI state); and a control unit, applying the TCI state indicated by the MAC CE to at least one of a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH), The control unit applies the operation of activating the TCI state in all component carriers (CCs) in the same applicable list as the serving cell to multiple transmission / reception points (multi-TRPs) when the TCI state of the serving cell is activated through the MAC CE, The base station has: A sending unit, sending the MAC CE, The control unit controls, based on a value of a 1-bit field of the MAC CE, to apply the TCI state of the MAC CE to the PDSCH or to the PUSCH, The MAC CE includes a field indicating whether a second TCI state exists in the code point.

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