Terminal, wireless communication method and base station

Abstract

A terminal according to one embodiment of the present disclosure includes: a receiving unit for receiving a radio resource control parameter (RRC parameter) of a TCI state that can be used as a transmission configuration indication state (TCI state) for a downlink (DL) or as a TCI state for an uplink (UL); and a control unit for determining that the RRC parameter can be used in at least one of the TCI state for the DL and the TCI state for the UL based on which set the RRC parameter is associated with the TCI state. According to one embodiment of the present disclosure, the TCI state can be appropriately controlled.

Description

Technical Field

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

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

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

[0004] Prior art literature

[0005] Non-patent literature

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

[0007] Problems to be solved by the invention

[0008] In NR, research is underway to use the UL Transmission Configuration Indication state (TCI state) as a beam (precoder) indication method for the uplink (UL).

[0009] However, when the UL TCI state is introduced, research has not yet progressed on how to control the TCI state including the existing TCI state (TCI state for downlink (DL)). If this control is not clarified, there is a concern that the increase in communication throughput will be suppressed.

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

[0011] Means for solving problems

[0012] A terminal involved in one method of the present disclosure comprises: a receiving unit, which receives a radio resource control (Radio Resource Control) parameter (RRC parameter) of a TCI state that can be used as a transmission configuration indication state (Transmission Configuration Indication state) for a downlink (Downlink) (DL) or a TCI state for an uplink (Uplink) (UL); and a control unit, which determines that the RRC parameter can be used in at least one of the TCI state for the DL and the TCI state for the UL based on which set the RRC parameter is associated with the TCI state.

[0013] Effects of the Invention

[0014] According to one aspect of the present disclosure, the TCI state can be appropriately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing an example of RRC settings for the TCI state in Implementation 1.1.

[0016] Figure 2 This is a diagram showing an example of RRC settings for the TCI state in Implementation 1.2.

[0017] Figure 3 This is a diagram showing another example of RRC configuration for the TCI state in Implementation 1.2.

[0018] Figure 4 This is a diagram showing an example of RRC settings for the TCI state in Implementation 1.3.

[0019] Figure 5 This is a diagram showing an example of RRC settings for the TCI state in Implementation 1.4.

[0020] Figure 6 This is a diagram showing another example of RRC configuration for the TCI state in Implementation 1.4.

[0021] Figure 7 This is a diagram showing yet another example of RRC configuration for the TCI state in Implementation 1.4.

[0022] Figure 8 This is a diagram showing an example of RRC configuration of a set of TCI states in Implementation 2.1.

[0023] Fig. 9 This is a diagram showing an example of RRC configuration of a set of TCI states in Implementation 2.2.

[0024] Fig.10 This is a diagram showing an example of RRC configuration of a set of TCI states in Implementation 2.3.

[0025] Fig.11A as well as Fig. 11B It is a diagram showing an example of TCI state activation / deactivation MAC CE in the third 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, the UE is studying the control of the reception processing (for example, at least one of reception, demapping, demodulation, and decoding) and the transmission processing (for example, at least one of transmission, mapping, precoding, modulation, and coding) of at least one of the signals and channels (which can also be expressed as signal / channel. In the present disclosure, "A / B" can also be replaced by "at least one of A and B") 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 Relation Information (SRI), etc. The TCI state may also be set for the UE per channel or per signal.

[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: Doppler shift, Doppler spread, average delay, and delay spread;

[0038] QCL Type B: Doppler shift and Doppler spread;

[0039] QCL Type C: Doppler shift and average delay;

[0040] QCL Type D: Spatial reception parameters.

[0041] Types A to C may correspond to QCL information associated with synchronization processing of at least one of time and frequency, and type D may correspond to QCL information related to beam steering.

[0042] The situation in which the UE assumes that a specific control resource set (CORESET), channel or reference signal is in a specific QCL (e.g., QCL type D) relationship with other CORESETs, channels or reference signals can also be called QCL assumption.

[0043] 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.

[0044] The TCI state may be, for example, information related to the QCL between the object channel (or the reference signal (ReferenceSignal(RS)) used for the channel) and other signals (for example, other downlink reference signals (DownlinkReferenceSignal(DL-RS))). The TCI state may also be set (indicated) by high-layer signaling, physical layer signaling, or a combination thereof.

[0045] 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.

[0046] MAC signaling may also use, for example, MAC Control Element (MAC CE), MAC Protocol Data Unit (MAC Protocol Data Unit (PDU)), etc. Broadcast information may also be, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

[0047] The physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI))).

[0048] In addition, the channel / signal that becomes the application object of the TCI state can be called the target channel / reference signal (target channel / RS), or simply referred to as the target, etc., and the other signals mentioned above can be called the reference reference signal (reference RS), source RS (source RS), or simply referred to as reference, etc.

[0049] The channel to which the TCI state is set (specified) may be, for example, a downlink shared channel (Physical Downlink Shared Channel (PDSCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH))), etc.

[0050] In addition, the RS (DL-RS) that forms a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (Synchronization Signal Block (SSB)) and a channel state information reference signal (CSI-RS). Alternatively, the DL-RS may be a CSI-RS used for tracking (also called a tracking reference signal (TRS))), or a reference signal used for QCL detection (also called QRS).

[0051] 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.

[0052] The information element of the TCI state set by high-layer signaling ("TCI-state IE" of RRC) may also include one or more QCL information ("QCL-Info"). The QCL information may also include at least one of information related to the DL-RS that forms a QCL relationship (DL-RS relationship information) and information indicating the QCL type (QCL type information). The DL-RS relationship information may also include information such as the index of the DL-RS (for example, SSB index, non-zero power CSI-RS (Non-Zero-Power (NZP) CSI-RS) resource ID (identifier)), the index of the cell where the RS is located, and the index of the bandwidth part (Bandwidth Part (BWP)) where the RS is located.

[0053] (Spatial relationship between SRS and PUSCH)

[0054] In Rel.15NR, the UE can also receive information (SRS setting information, such as parameters in the "SRS-Config" of the RRC control element) used in the transmission of a measurement reference signal (e.g., a sounding reference signal (SRS)).

[0055] Specifically, the UE may also receive at least one of information related to one or more SRS resource sets (SRS resource set information, for example, "SRS-ResourceSet" of the RRC control element) and information related to one or more SRS resources (SRS resource information, for example, "SRS-Resource" of the RRC control element).

[0056] One SRS resource set may be associated with a specific number of SRS resources (or the specific number of SRS resources may be grouped). Each SRS resource may be identified by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).

[0057] The SRS resource set information may also include an SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type, and information on the usage of the SRS.

[0058] Here, the SRS resource type may also represent any one of periodic SRS (Periodic SRS (P-SRS)), semi-persistent SRS (Semi-Persistent SRS (SP-SRS)), and aperiodic CSI (Aperiodic SRS (A-SRS)). In addition, the UE may also periodically (or periodically after activation) send P-SRS and SP-SRS, and send A-SRS based on the SRS request of the DCI.

[0059] In addition, the purpose (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") can also be, for example, beam management (beamManagement), codebook (codebook (CB)), noncodebook (noncodebook (NCB)), antenna switching (switching), etc. SRS for codebook or non-codebook purposes can also be used to determine the precoder transmitted by the codebook-based or non-codebook-based uplink shared channel (Physical Uplink Shared Channel (PUSCH)) based on SRI.

[0060] For example, in the case of codebook-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI, Transmitted Rank Indicator (TRI) and Transmitted Precoding Matrix Indicator (TPMI). In the case of non-codebook-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI.

[0061] SRS resource information may also include SRS resource ID (SRS-ResourceId), SRS port number, SRS port number, send comb, SRS resource mapping (for example, time and / or frequency resource location, resource offset, resource period, number of repetitions, number of SRS code elements, SRS bandwidth, etc.), jump association information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

[0062] The spatial relationship information of SRS (for example, "spatialRelationInfo" of RRC information element) may also indicate the spatial relationship information between a specific reference signal and SRS. The specific reference signal may also be at least one of a synchronization signal / broadcast channel (Synchronization Signal / Physical Broadcast Channel (SS / PBCH)) block, a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and an SRS (for example, other SRS). The SS / PBCH block may also be referred to as a synchronization signal block (SSB).

[0063] The spatial relationship information of SRS may also include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID as an index of the above-mentioned specific reference signal.

[0064] In addition, in the present disclosure, the SSB index, SSB resource ID, and SSB resource indicator (SSBRI) may also be replaced with each other. In addition, the CSI-RS index, CSI-RS resource ID, and CSI-RS resource indicator (CSI-RS Resource Indicator (CRI)) may also be replaced with each other. In addition, the SRS index, SRS resource ID, and SRI may also be replaced with each other.

[0065] The spatial relationship information of the SRS may also include a serving cell index, a BWP index (BWP ID), etc. corresponding to the above-mentioned specific reference signal.

[0066] When spatial relationship information related to SSB or CSI-RS and SRS is set for a certain SRS resource, the UE may also use the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain receive filter) used for receiving the SSB or CSI-RS to transmit the SRS resource. In this case, the UE may also assume that the UE receive beam of the SSB or CSI-RS is the same as the UE transmit beam of the SRS.

[0067] When spatial relationship information related to other SRS (reference SRS) and the SRS (target SRS) is set for a certain SRS (target SRS) resource, the UE may also transmit the target SRS resource using the same spatial domain filter (spatial domain transmission filter) as the spatial domain filter (spatial domain transmission filter) used for transmitting the reference SRS. That is, in this case, the UE may also assume that the UE transmission beam of the reference SRS is the same as the UE transmission beam of the target SRS.

[0068] The UE may also determine the spatial relationship of the PUSCH scheduled by the DCI based on the value of a specific field (e.g., SRS resource identifier (SRI) field) in the DCI (e.g., DCI format 0_1). Specifically, the UE may also use the spatial relationship information of the SRS resource determined based on the value of the specific field (e.g., SRI) (e.g., "spatialRelationInfo" of the RRC information element) for PUSCH transmission.

[0069] In Rel.15 / 16NR, when codebook-based transmission is used for PUSCH, the UE may also be configured with an SRS resource set with a maximum of two SRS resources for the purpose of the codebook through RRC, and may also be indicated one of the maximum two SRS resources through DCI (1-bit SRI field). The transmit beam of PUSCH is specified by the SRI field.

[0070] The UE may also determine the TPMI and the number of layers (transmission rank) for the PUSCH based on the precoding information and the number of layers field (hereinafter, also referred to as the precoding information field). The UE may also select a precoder based on the TPMI, the number of layers, etc. from the uplink codebook for the same number of ports as the number of SRS ports indicated by "nrofSRS-Ports" of the high-level parameter, wherein the high-level parameter is a high-level parameter set for the SRS resource specified by the SRI field.

[0071] In Rel.15 / 16NR, when non-codebook based transmission is used for PUSCH, the UE can also be configured with an SRS resource set with a maximum of four SRS resources for non-codebook use through RRC, and can also be indicated with one or more of the maximum four SRS resources through DCI (2-bit SRI field).

[0072] The UE may also determine the number of layers (transmission rank) used for PUSCH based on the SRI field. For example, the UE may determine that the number of SRS resources specified by the SRI field is the same as the number of layers used for PUSCH. In addition, the UE may also calculate the precoder of the SRS resource.

[0073] When the CSI-RS associated with the SRS resource (or the SRS resource set to which the SRS resource belongs) (also referred to as the associated CSI-RS) is set in the upper layer, the transmit beam of the PUSCH can also be calculated based on (the measurement of) the set associated CSI-RS. Otherwise, the transmit beam of the PUSCH can also be specified by the SRI.

[0074] In addition, the UE may also be configured to use codebook-based PUSCH transmission or non-codebook-based PUSCH transmission through a high-layer parameter "txConfig" indicating a transmission scheme. This parameter may also indicate a value of "codebook" or "non-codebook".

[0075] In the present disclosure, codebook-based PUSCH (codebook-based PUSCH transmission, codebook-based transmission) may also mean PUSCH in which "codebook" is set as a transmission scheme in the UE. In the present disclosure, non-codebook-based PUSCH (non-codebook-based PUSCH transmission, non-codebook-based transmission) may also mean PUSCH in which "non-codebook" is set as a transmission scheme in the UE.

[0076] (UL TCI status)

[0077] In NR, the use of UL TCI status as a beam indication method for UL is under study. The UL TCI status is similar to the notification of the DL beam (DL TCI status) of the UE. In addition, the DL TCI status can also be interchanged with the TCI status for PDCCH / PDSCH.

[0078] The UL TCI state can also be set to the UE through the spatial relationship information specified in a specific version (for example, spatialRelationInfo-r17 specified in Rel.17) (also referred to as UL TCI state information). The UL TCI state can be called a unified TCI state (U-TCI state), a spatial relationship, a spatial relationship of a specific version, etc.

[0079] One or more of the configured UL TCI states may also be activated / deactivated using MAC CE. In addition, spatial relationship information for at least one of A-SRS, PUSCH, PUCCH, and PRACH may also be assigned to the UE via DCI based on the configured / activated UL TCI state.

[0080] The channel / signal (also referred to as the target channel / RS) for which the UL TCI state is set (specified) may be, for example, at least one of a PUSCH, a demodulation reference signal (DeModulation Reference Signal (DMRS)) for PUSCH, a PUCCH, a DMRS for PUCCH, a random access channel (Physical Random Access Channel (PRACH)), an SRS, etc.

[0081] In addition, the RS (reference RS) that has a QCL relationship with the channel / signal can be, for example, a DL RS (for example, SSB, CSI-RS, TRS, etc.) or a UL RS (for example, SRS, SRS for beam management, etc.).

[0082] In the UL TCI state, the RS that is in a QCL relationship with the channel / signal can also be associated with the panel (panel ID) used to receive or send the RS. The association can be explicitly set (or specified) through high-level signaling (e.g., RRC signaling, MAC CE, etc.) or can be implicitly determined.

[0083] The correspondence between the RS and the panel ID may be set by being included in the UL TCI status information, or may be set by being included in at least one of the resource setting information, the spatial relationship information, etc. of the RS.

[0084] The QCL type represented by the UL TCI state can be either the existing QCL type AD or other QCL types, and can also include a specific spatial relationship, an associated antenna port (port index), and the like.

[0085] For UL transmission, if an associated panel ID is specified (for example, specified by DCI), the UE may also use the panel corresponding to the panel ID for the UL transmission. The panel ID may also be associated with the UL TCI state. When the UL TCI state is specified (or activated) for a specific UL channel / signal, the UE may also follow the panel ID associated with the UL TCI state to determine the panel used in the UL channel / signal transmission.

[0086] However, when the UL TCI state is introduced, research has not yet progressed on how to control the TCI state including the existing TCI state (TCI state for downlink (DL)). If this control is not clarified, there is a concern that the increase in communication throughput will be suppressed.

[0087] Therefore, the inventors of the present invention have come up with a method for appropriately controlling the TCI state. For example, in one embodiment of the present disclosure, a specific structure of RRC signaling, MAC CE, etc. for setting / activating the TCI state is provided.

[0088] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods involved in each embodiment can be applied individually or in combination. In addition, the embodiments of the present disclosure can also be used when the UL TCI state is not introduced.

[0089] In addition, in the present disclosure, “A / B” may also mean “at least one of A and B”.

[0090] In the present disclosure, activation, deactivation, indication (or indication), selection, configuration, update, determination, etc. may also be used interchangeably.

[0091] In the present disclosure, panel, beam, panel group, beam group, uplink (UL) transmitting entity, TRP, spatial relationship information (SRI), spatial relationship, control resource set (CORESET), physical downlink shared channel (PDSCH), codeword, base station, specific antenna port (for example, demodulation reference signal (DMRS)) port), specific antenna port group (for example, DMRS port group), specific group (for example, code division multiplexing (CDM)) group, specific reference signal group, CORESET group), specific resource (for example, specific reference signal resource), specific resource set (for example, specific reference signal resource set), CORESET pool, PUCCH group (PUCCH resource group), spatial relationship group, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state (unified TCI state), QCL, etc. can also be replaced with each other.

[0092] In addition, the spatial relationship information identifier (Identifier (ID)) (TCI state ID) and the spatial relationship information (TCI state) can also be replaced with each other. "Spatial relationship information" can also be replaced with "a collection of spatial relationship information", "one or more spatial relationship information", etc. TCI state and TCI can also be replaced with each other.

[0093] In the present disclosure, index, ID, indicator, resource ID may also be replaced with each other. In addition, in the present disclosure, sequence, list, set (set), group, group, cluster, subset, etc. may also be replaced with each other.

[0094] In the following embodiments, spatial relationship information (spatialRelationInfo), spatial relationship information specified in a specific version (for example, spatialRelationInfo-r17 specified in Rel.17), TCI state specified in a specific version (for example, TCI-state-r17 specified in Rel.17), etc. may also be interchangeable.

[0095] Furthermore, in the following embodiments, the spatial relationship information ID (spatialRelationInfoId), the spatial relationship information ID specified in a specific version (for example, spatialRelationInfoId-r17 specified in Rel.17), the TCI state ID specified in a specific version (for example, TCIstateId-r17 specified in Rel.17), etc. may be replaced with each other. In addition, the names of these parameters are not limited to this.

[0096] In the description of the following implementation methods, "Spatial Relation Information (Spatial Relation Information (SRI))", "Spatial Relation Information for PUSCH", "spatial relationship", "UL beam", "UE's transmit beam", "ULTCI", "UL TCI state", "spatial relationship of UL TCI state", SRS Resource Indicator (SRS Resource Indicator (SRI)), SRS resources, precoder, etc. may also be interchangeable.

[0097] (Wireless Communication Method)

[0098] <First embodiment>

[0099] The first embodiment relates to RRC configuration of TCI states that can be used in common for DL ​​and UL. The first embodiment is roughly divided into embodiments 1.1 to 1.4, and each of them will be described below.

[0100] [Implementation method 1.1]

[0101] Regarding the TCI state of implementation example 1.1, a downlink RS (DL RS) (for example, CSI-RS / SSB) can be set as a reference RS, and QCL type A / B / C / D can be set as a QCL type.

[0102] Figure 1 This is a diagram showing an example of RRC configuration for the TCI state in Implementation 1.1. This example is recorded using the Abstract Syntax Notation One (ASN.1) notation (in addition, it is just an example, so it may not be a complete record). In the following figures, there are also cases where the ASN.1 notation is used for recording.

[0103] In addition, in the present disclosure, a suffix indicating that the information element or parameter is introduced through a specific resource may be added to the name of the RRC information element or the RRC parameter (for example, "_r16", "_r17", "-r16", "-r17", etc.). The suffix may not be added.

[0104] The RRC information element of the TCI state, namely TCI-state, may also include TCI-StateId indicating the TCI state ID, and one or more QCL information, namely QCL-Info.

[0105] The QCL information may also include information such as the index of the cell to which the reference RS is transmitted (i.e., ServCellIndex), the index of the BWP to which the reference RS is transmitted (i.e., BWP-Id). In addition, when CSI-RS (or SSB) is represented as a reference RS, BWP-Id may also be represented by a parameter bwp-Id indicating the index of the DL BWP to which the reference RS is transmitted.

[0106] The QCL information may also include a parameter referenceSignal indicating a reference RS (may also be referred to as reference RS information). The reference RS information may also include an index of a DL RS (eg, NZP CSI-RS resource ID (NZP-CSI-RS-ResourceId), SSB index (SSB-Index)).

[0107] The QCL information may include a QCL type parameter (qcl-Type) indicating any one of the QCL types AD.

[0108] The TCI state of Embodiment 1.1 may be applied only in DL (may be used only as a DL TCI state), may be applied only in UL (may be used only as a UL TCI state), or may be applied in both DL and UL.

[0109] In addition, in the present disclosure, the TCI state is applied only in DL and may also mean that only DL channels / signals can refer to (or be associated with) the TCI state. In addition, in the present disclosure, the TCI state is applied only in UL and may also mean that only UL channels / signals can refer to (or be associated with) the TCI state. In addition, in the present disclosure, the TCI state is applied in both DL and UL and may also mean that both DL channels / signals and UL channels / signals can refer to (or be associated with) the TCI state.

[0110] In addition, in the present disclosure, "a certain TCI state is applied in DL" can also be replaced with "a target channel / signal of a certain TCI state is a DL channel / signal", "a certain TCI state is used as a DL TCI state", etc.

[0111] In the present disclosure, the DL channel / signal to which the TCI state is applied may be, for example, PDSCH, PDCCH (CORESET), CSI-RS, SSB, DMRS, etc.

[0112] In addition, in the present disclosure, "a certain TCI state is applied in UL" can also be replaced with "the target channel / signal of a certain TCI state is a UL channel / signal", "a certain TCI state is used as a UL TCI state", etc.

[0113] In the present disclosure, the DL channel / signal to which the TCI state is applied may also be, for example, PUSCH, PUCCH, SRS, DMRS, etc.

[0114] [Implementation method 1.2]

[0115] Regarding the TCI state of implementation 1.2, at least one of the DL RS (e.g., CSI-RS / SSB) and the uplink RS (UL RS) (e.g., SRS) can be set as the reference RS, and the QCL type A / B / C / D can be set as the QCL type.

[0116] Figure 2 is a diagram showing an example of RRC configuration of the TCI state in Implementation 1.2. Figure 2 in Figure 1 Different points are explained, and the explanation of the same points is not repeated.

[0117] The RRC information element of the TCI state, namely TCI-state-r17, may also include one or more QCL information, namely QCL-Info-r17.

[0118] Figure 2The QCL information may include the index of the UL RS (eg, SRS-ResourceId) as the reference RS information. When the SRS is indicated as the reference RS, the QCL information may include a parameter uplinkBWP indicating the index of the UL BWP to which the reference RS is transmitted.

[0119] In the case where the TCI state of implementation 1.2 is used as the DL TCI state and the SRS is set as the reference RS, it can also be assumed that only the QCL type D is set as the QCL type parameter. In this case, the QCL type D can also be interpreted as the spatial domain filter used for DL ​​reception being the same as the spatial domain filter used for UL transmission (in other words, the same spatial transmission / reception parameters are applied between two UL / DL antenna ports (or UL / DL RS)).

[0120] The existing QCL type D of Rel.15 / 16 means that the spatial reception parameters are the same between two DL antenna ports (or DL ​​RSs). As a result, by using the above interpretation, a unified QCL type can be used in DL-UL without newly defining a QCL type.

[0121] In addition, when the TCI state of implementation 1.2 is used as the UL TCI state and when SRS / CSI-RS / SSB is set as the reference RS, it can also be assumed that only QCL type D is set as the QCL type parameter. In this case, QCL type D can also be interpreted as the spatial domain filter used for UL transmission being the same as the spatial domain filter used for UL transmission / DL reception (in other words, the same spatial transmission / reception parameters are applied between two UL / DL antenna ports (or UL / DL RS)).

[0122] Figure 3 is a diagram showing another example of RRC configuration of the TCI state in Implementation 1.2. Figure 3 in Figure 2 Different points are explained, and the explanation of the same points is not repeated.

[0123] Figure 3 The QCL type parameter (qcl-Type-r17) may also indicate at least one of the new QCL types (referred to as QCL types X, Y, Z, etc. in this disclosure) based on or replacing at least one of the QCL types AD. Figure 3 In the QCL type parameter, the value can be QCL type A, B, C, D or X.

[0124] QCL type X may also indicate that, when the TCI state is used as the DL TCI state and when the SRS is set as the reference RS, the spatial domain filter used for DL ​​reception is the same as the spatial domain filter used for UL transmission.

[0125] QCL type Y may also indicate that, when the TCI state is used as the UL TCI state and when the SRS is set as the reference RS, the spatial domain filter used for UL transmission is the same as the spatial domain filter used for UL transmission.

[0126] QCL type Z may also indicate that when the TCI state is used as the UL TCI state and when the CSI-RS / SSB is set as the reference RS, the spatial domain filter used for UL transmission is the same as the spatial domain filter used for DL ​​reception.

[0127] In addition, a common QCL type may be defined that can refer to multiple (for example, all) of these QCL types X, Y, and Z. For example, a common QCL type (for example, also referred to as QCL type XY, etc.) that is interpreted as QCL type X when the TCI state is used as a DL TCI state and is interpreted as QCL type Y when the TCI state is used as a UL TCI state may be defined and set in qcl-Type-r17.

[0128] The TCI state of implementation mode 1.2 may be applied only in DL, only in UL, or in both DL and UL.

[0129] [Implementation method 1.3]

[0130] Regarding the TCI state of embodiment 1.3, at least one of a DL RS (eg, CSI-RS / SSB) and a UL RS (eg, SRS) can be set as a reference RS, but the QCL type is not set.

[0131] Figure 4 is a diagram showing an example of RRC configuration of the TCI state in Implementation 1.3. Figure 4 in Figure 2 Different points are explained, and the explanation of the same points is not repeated.

[0132] Figure 4 The RRC information element of the TCI state, namely TCI-state-r17, has the following structure, that is, it does not contain Figure 2QCL-Info-r17 representing the QCL information (represented by the RRC parameter qcl-Type1 / 2 containing the QCL type information), and directly includes the RRC parameters other than the QCL type parameter (qcl-Type / qcl-Type-r17) in QCL-Info-r17.

[0133] In addition, when the reference RS is a DL RS, the name of the parameter bwp-Id indicating the index of the DL BWP is transformed into downlinkBWP, but the parameter name is not limited to this (in addition, in the present disclosure, these names can also be replaced with each other).

[0134] The QCL type of the TCI state of implementation 1.3 is not explicitly set, but can be implicitly determined (derived) based on other parameters. For example, when the TCI state is used as a DL TCI state and when the SRS is set as a reference RS, it can also be determined that the QCL type of the TCI state is the QCL type X described in implementation 1.2. For QCL types Y, Z, etc., it can also be determined based on the description of implementation 1.2.

[0135] According to the RRC setting of the TCI state of implementation 1.3, the QCL type parameter is not explicitly included, thereby suppressing the increase in communication overhead involved in the setting of the TCI state.

[0136] The TCI state of implementation mode 1.3 may be applied only in DL, only in UL, or in both DL and UL.

[0137] [Implementation method 1.4]

[0138] The TCI state of Embodiment 1.4 includes both QCL information for DL ​​and QCL information for UL.

[0139] Figure 5 is a diagram showing an example of RRC configuration of the TCI state in Implementation 1.4. Figure 5 The points that are different from the previous figures are explained, and the description of the same points is not repeated.

[0140] Figure 5The RRC information element of the TCI state, i.e., TCI-state-r17, includes QCL-Info indicating DL-oriented QCL information (indicated by RRC parameter qcl-Type1 / 2 including information of QCL type) and QCL-UL indicating UL-oriented QCL information. In this way, the QCL information of implementation 1.4 can also be indicated by different RRC parameters in DL and UL.

[0141] The QCL-Info can also be used with Figure 1 In addition, the content of the QCL-UL may also be, for example, Figure 2 The content of the QCL type parameter (qcl-Type / qcl-Type-r17) is deleted from QCL-Info-r17. The QCL type related to the QCL information for UL in embodiment 1.4 can also be implicitly determined in the same manner as in embodiment 1.3.

[0142] Figure 6 is a diagram showing another example of RRC configuration of the TCI state in Implementation 1.4. Figure 6 in Figure 5 Different points are explained, and the explanation of the same points is not repeated.

[0143] exist Figure 6 The RRC information element of the TCI state, i.e. TCI-state-r17, contains the following as DL-oriented QCL information: Figure 2 QCL-Info-r17 instead of QCL-Info. Alternatively, QCL-Info-r17 can also be Figure 3 QCL-Info-r17.

[0144] Figure 7 A diagram showing another example of RRC configuration for the TCI state in Implementation 1.4. Figure 7 in Figure 5 Different points are explained, and the explanation of the same points is not repeated.

[0145] exist Figure 7 In the RRC information element of the TCI state, i.e., TCI-state-r17, both the DL-oriented QCL information and the UL-oriented QCL information are used. Figure 3 QCL-Info-r17. When SRS is set as a reference RS for DL, or CSI-RS / SSB / SRS is set as a reference RS for UL, QCL type D or the above-mentioned new QCL type may also be set as the QCL type.

[0146] The TCI state of embodiment 1.4 is applied to both DL and UL.

[0147] According to the first embodiment described above, the RRC setting of the TCI state can be appropriately configured.

[0148] <Second embodiment>

[0149] The second embodiment relates to RRC configuration of a set of one or more TCI states for at least one of DL and UL. The second embodiment is roughly divided into embodiments 2.1 to 2.4, each of which will be described below.

[0150] [Implementation method 2.1]

[0151] The set of TCI states of implementation mode 2.1 is equivalent to a set common to both DL and UL. The set includes one or more TCI states. Each TCI state in the set is applied to both DL and UL (i.e., each TCI state can be used as a DL TCI state or a UL TCI state).

[0152] Figure 8 This is a diagram showing an example of RRC configuration of a set of TCI states in Implementation 2.1.

[0153] exist Figure 8 In the RRC information element Unified-TCI-State-Config for setting unified TCI states, the RRC parameter tci-StatesToAddModList may also include a list of at least one unified TCI states (for example, TCI-State-r17, TCI-State, etc. as described in the first embodiment) with a maximum of maxNrofTCI-States. tci-StatesToRelease may also be used to release a TCI state from the list.

[0154] In addition, maxNrofTCI-States can also represent the maximum number of unified TCI states that can be set for the UE, which can be pre-specified through specifications, set through high-layer signaling, or determined based on UE capabilities.

[0155] The UE may apply the TCI state configured by Unified-TCI-State-Config as at least one of the DL TCI state and the UL TCI state.

[0156] [Implementation method 2.2]

[0157] The set of TCI states of implementation mode 2.2 is equivalent to a set common to both DL and UL. The set includes one or more TCI states. The point that implementation mode 2.2 is different from implementation mode 2.1 is that a subset of UL TCI states (UL subset) and a subset of DL TCI states (DL subset) are further selected from the TCI states included in the common set.

[0158] These subsets can be set through RRC, activated through MAC CE, or specified through DCI.

[0159] Fig. 9 This is a diagram showing an example of RRC configuration of a set of TCI states in Implementation 2.2. This example corresponds to a situation where a set of common TCI states is configured through RRC, and further, a subset of UL TCI states and a subset of DLTCI states are configured from the common set through RRC. Figure 8 The same, therefore, will not be repeated.

[0160] exist Fig. 9 In the RRC information element UL-TCI-State-Config for setting the UL TCI state, it may also include a list of one or more TCI state IDs (TCI-State-r17 IDs (also expressed as TCI-StateId, TCI-State-ID-r17, etc.) with a maximum of maxNrofULTCI-States, namely the RRC parameter UL-tci-StatesToAddModList. UL-tci-StatesToRelease may also be used to release the TCI state from the list.

[0161] In addition, maxNrofULTCI-States can also represent the maximum number of UL TCI states that can be set for the UE, which can be pre-specified through specifications, set through higher-layer signaling, or determined based on UE capabilities.

[0162] exist Fig. 9In the RRC information element DL-TCI-State-Config used to configure the DL TCI state, the RRC parameter DL-tci-StatesToAddModList may also contain a list of one or more TCI state IDs (TCI-State-r17 IDs (also expressed as TCI-StateId, TCI-State-ID-r17, etc.) with a maximum of maxNrofDLTCI-States. DL-tci-StatesToRelease may also be used to release the TCI state from the list.

[0163] In addition, maxNrofDLTCI-States may also indicate the maximum number of DL TCI states that can be set for the UE, which may be pre-specified through specifications, may be set through higher-layer signaling, or may be determined based on UE capabilities.

[0164] In the present disclosure, maxNrofULTCI-States, maxNrofDLTCI-States, etc. may also be the same value and may also be replaced by maxNrofTCI-States.

[0165] In this way, a certain TCI state (TCI-State-r17) may refer to the UL TCI state when it is set in association with the UL TCI state (for example, included in UL-TCI-State-Config), and may refer to the DL TCI state when it is set in association with the DL TCI state (for example, included in DL-TCI-State-Config).

[0166] The UE may assume that one TCI state is associated with only one of the DL TCI state and the UL TCI state, or may assume that one TCI state may be associated with both the DL TCI state and the UL TCI state.

[0167] Take, for example, a case where a total of 8 TCI states, TCI state IDs = 1 to 8, are set in the above common set. In the former scenario, for example, TCI state IDs = 1-4 are associated with UL TCI states, and TCI state IDs = 5-8 are associated with DLTCI states. In the latter scenario, for example, TCI state IDs = 1-4 are associated with UL TCI states, and TCI state IDs = 3-6 are associated with DL TCI states (TCI state IDs = 3-4 are associated with both DL and UL).

[0168] In addition, in the above, an example of selecting a subset of UL TCI states and a subset of DL TCI states from a common set is shown, but it is not limited to this. For example, in the case where a set (e.g., unified-TCI-State-Config) is set as a set for one of the UL TCI state and the DL TCI state, a subset for the other of the UL TCI state and the DL TCI state can also be selected from the set. In the case where unified-TCI-State-Config represents a set of DL TCI states, it is sufficient to set the UL-TCI-State-Config for the UL TCI state, and there is no need to set the DL-TCI-State-Config for the DL TCI state separately.

[0169] The UE may also determine that the TCI states in the first range in the common set represent DL TCI states, and the TCI states in the second range represent UL TCI states. For example, the UE may also determine that entries 0 to X in the list of common sets (UL-tci-StatesToAddModList) represent DL, and entries X+1 to Y represent UL. The UE may also determine that entries 0 to X in the list of common sets (UL-tci-StatesToAddModList) represent DL, and entries 0 to Y represent UL. In this way, the first range and the second range may overlap (in the case of overlap, they are used as both DL TCI states and UL TCI states).

[0170] In addition, the "i-th entry" here may also be replaced by the i-th TCI state from the TCI state with a smaller (or larger) TCI state ID among the TCI states included in the common set.

[0171] The above-mentioned first range, second range, etc. (for example, the value of X, the value of Y, the starting position of the range (0, X+1, etc. in the above example)) can be pre-defined through specifications, set through high-level signaling, or determined based on UE capabilities.

[0172] The UE may also apply the TCI state associated with the configured UL-TCI-State-Config as the UL TCI state. The UE may also apply the TCI state associated with the configured DL-TCI-State-Config as the DL TCI state.

[0173] [Implementation method 2.3]

[0174] The set of TCI states in Embodiment 2.3 corresponds to a separate set for DL ​​and a separate set for UL. These sets include one or more TCI states. In Embodiment 2.3, a common set is not set.

[0175] Fig.10 This is a diagram showing an example of RRC configuration of a set of TCI states in Implementation 2.3. Fig.10 In the figure, it is shown that Fig. 9 The same RRC information element for the configuration of the UL TCI state, UL-TCI-State-Config, and the RRC information element for the configuration of the DL TCI state, DL-TCI-State-Config. Fig. 9 Different, the UL-tci-StatesToAddModList of UL-TCI-State-Config is a list of RRC information elements UL-TCI-State-r17 dedicated to UL TCI states, and the DL-tci-StatesToAddModList of DL-TCI-State-Config is a list of RRC information elements DL-TCI-State-r17 dedicated to DL TCI states.

[0176] The actual states of UL-TCI-State-r17 and DL-TCI-State-r17 may also be equivalent to TCI-State-r17 and TCI-State described in the first embodiment. UL-TCI-State-r17 and DL-TCI-State-r17 are independent, for example, even if the TCI state ID is the same, they represent different TCI states.

[0177] The UE may also apply the TCI state associated with the configured UL-TCI-State-Config as the UL TCI state. The UE may also apply the TCI state associated with the configured DL-TCI-State-Config as the DL TCI state.

[0178] [Implementation method 2.4]

[0179] Embodiment 2.4 is equivalent to a combination of multiple embodiments 2.1 to 2.3.

[0180] For example, consider the combination of implementation modes 2.1 and 2.2. When the UE is not configured with the configuration for UL TCI / DL TCI state (e.g., UL-TCI-State-Config / DL-TCI-State-Config), the UE may apply the common TCI state configuration (e.g., Unified-TCI-State-Config) in both UL and DL based on implementation mode 2.1. When it is not the case (the configuration for UL TCI / DL TCI state is configured), the UE may apply the configuration for UL TCI / DL TCI state in UL / DL based on implementation mode 2.2.

[0181] For example, consider the combination of implementation modes 2.1 and 2.3. When the UE is not configured with the configuration for UL TCI / DL TCI state (e.g., UL-TCI-State-Config / DL-TCI-State-Config), the UE may apply the common TCI state configuration (e.g., Unified-TCI-State-Config) in both UL and DL based on implementation mode 2.1. When it is not the case (the configuration for UL TCI / DL TCI state is configured), the UE may apply the configuration for UL TCI / DL TCI state in UL / DL based on implementation mode 2.3.

[0182] According to the second embodiment described above, for example, the RRC configuration of the DL TCI state / UL TCI state can be appropriately configured.

[0183] <Third Embodiment>

[0184] The third embodiment relates to a MAC CE that activates the TCI state.

[0185] MAC CE can activate both DL and UL TCI states, or activate the DL TCI state and UL TCI state separately.

[0186] Fig.11A as well as Fig. 11B : is a diagram showing an example of TCI state activation / deactivation MAC CE in the third embodiment. In addition, the MAC CE can also be used to activate / deactivate the TCI state for a specific channel / signal (e.g., PDSCH, PUSCH, PDCCH, PUCCH, SRS, CSI-RS, etc.).

[0187] Fig.11A The MAC CE contains the CORESET pool ID field, the serving cell ID field, the BWP ID field and the T iIn addition, the R field indicates a reserved field that is scheduled to be used in the future.

[0188] The serving cell ID field and the BWP ID field indicate the serving cell and the BWP to which the MAC CE is applied.

[0189] If T i If the TCI state ID field is set to 1, it can also indicate that the TCI state with TCI state ID i (or the i-th smallest or largest TCI state ID among the set TCI states / DL TCI states / UL TCI states) is activated and mapped to the code point of the TCI field of the DCI. The code point of the mapped TCI state can also be indicated by the TCI state ID field set to 1. i The position of the field representing the order in which all TCI states are located is determined.

[0190] The CORESET Pool ID field can also indicate the activated TCI state and the i The mapping between code points of the TCI field of the DCI in which the field is set is specific to the CORESET in which the CORESET Pool ID is set. The CORESET Pool ID field may not exist.

[0191] Fig. 11B The MAC CE contains the serving cell ID field, the BWP ID field, and the C i Field and TCI Status ID i,j field.

[0192] 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 may also indicate the jth activated TCI state of the code point (i) mapped to the DCI field indicating the TCI state (e.g., TCI field). The TCI code point to which the TCI state is mapped may also be accompanied by the TCI state ID i，j The set of fields representing the sequential position of all TCI code points is determined.

[0193] The UE may also determine the TCI state to be applied in a specific channel / signal (e.g., PDSCH, PUSCH, PDCCH, PUCCH, SRS, CSI-RS, etc.) based on at least one of the TCI state set by RRC parameters described in the first and second embodiments, the TCI state activated by MAC CE described in the third embodiment, and the TCI state specified by DCI from the set or activated TCI states.

[0194] In addition, the MAC CE for activating the TCI state disclosed in the present invention is not limited to Fig.11A as well as Fig. 11B .

[0195] According to the third embodiment described above, for example, a MAC CE for activating the DL TCI state / UL TCI state can be appropriately configured.

[0196] <Other embodiments>

[0197] In addition, in the present disclosure, the setting of the TCI state (set) described in the first and second embodiments, the activation of the TCI state described in the third embodiment, etc. can also be performed in units of at least one of the following:

[0198] All UL and DL channels / signals,

[0199] All UL channels / signals,

[0200] All DL channels / signals,

[0201] Each channel / signal.

[0202] In other words, an RRC setting / an activation for the TCI state can be applied commonly in all channels / signals, only in UL, only in DL, or only in specific channels / signals (for example, PDSCH, PUSCH, PDCCH, PUCCH, SRS, CSI-RS, etc.).

[0203] (Wireless Communication System)

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0209] 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.

[0210] 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).

[0211] 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.

[0212] Furthermore, the user terminal 20 may perform communication in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0213] Multiple base stations 10 may also be connected via wired (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station (relay) may also be referred to as an IAB node.

[0214] 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.

[0215] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0216] 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.

[0217] 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.

[0218] 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.

[0219] In addition, as uplink channels, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20), an uplink control channel (Physical Uplink Control Channel (PUCCH))), a random access channel (Physical Random Access Channel (PRACH)) and the like can also be used in the wireless communication system 1.

[0220] 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.

[0221] 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.

[0222] 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.

[0223] 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.

[0224] 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.

[0225] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) can also be transmitted through PUCCH. The random access preamble used to establish a connection with a cell can also be transmitted through PRACH.

[0226] 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.

[0227] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. As DL-RS, in the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. can also be transmitted.

[0228] 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.

[0229] 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).

[0230] (Base Station)

[0231] 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.

[0232] 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.

[0233] 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.

[0234] 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.

[0235] 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.

[0236] 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.

[0237] 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.

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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 .

[0243] 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 .

[0244] 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.

[0245] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (Radio Resource Management (RRM)) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (Received Signal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0246] 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.

[0247] 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 .

[0248] In addition, the sending and receiving unit 120 can also send a radio resource control (Radio Resource Control (RRC)) parameter of a TCI state that can be used as a transmission configuration indication state (Transmission Configuration Indication state (TCI state)) for the downlink (Downlink (DL)) and as a TCI state for the uplink (Uplink (UL)) to the user terminal 20.

[0249] The control unit 110 can also be assumed that the user terminal 20 determines (judgments) that the RRC parameter can be used in at least one of the TCI state for the DL and the TCI state for the UL (and used in beam control, etc.) based on which set the RRC parameter is associated with the TCI state.

[0250] (User Terminal)

[0251] 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.

[0252] 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.

[0253] 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.

[0254] 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.

[0255] 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.

[0256] 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.

[0257] 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.

[0258] 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.

[0259] 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.

[0260] 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.

[0261] 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.

[0262] 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.

[0263] 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 .

[0264] 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 .

[0265] 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.

[0266] 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.

[0267] 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 and the transmitting and receiving antenna 230 .

[0268] In addition, the sending and receiving unit 220 can also receive radio resource control (Radio Resource Control (RRC)) parameters of the TCI state (for example, the RRC information element of the TCI state, namely, TCI-state-r17) which can be used as a transmission configuration indication state (Transmission Configuration Indication state (TCI state)) (DL TCI state) for the downlink (Downlink (DL)) and as a TCI state (UL TCI state) for the uplink (Uplink (UL)).

[0269] The control unit 210 may also determine that the RRC parameter can be used in at least one of the TCI state for the DL and the TCI state for the UL based on which set the RRC parameter is associated with. The "set" here may also correspond to at least one of the above-mentioned tci-StatesToAddModList(Unified-TCI-State-Config), UL-tci-StatesToAddModList(UL-TCI-State-Config), DL-tci-StatesToAddModList(DL-TCI-State-Config), etc.

[0270] When the RRC parameter is associated with a first set (e.g., tci-StatesToAddModList) that is common to both DL and UL, the control unit 210 may also determine that the RRC parameter can be used in both the TCI state for the DL and the TCI state for the UL.

[0271] When the RRC parameter is associated with the first set and the RRC parameter is associated with a second set (e.g., UL-tci-StatesToAddModList) for one of the DL and UL (e.g., UL), the control unit 210 may also decide that the RRC parameter can be used only in the TCI state for one of the DL and UL.

[0272] When the RRC parameters are associated with the first set and the second set, and the RRC parameters are also associated with a third set for DL ​​and the other for UL (for example, DL-tci-StatesToAddModList), the control unit 210 may also decide that the RRC parameters can be used in both the TCI state for the DL and the TCI state for the UL.

[0273] (Hardware Structure)

[0274] 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.

[0275] 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.

[0276] 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.

[0277] 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.

[0278] 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.

[0279] 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.

[0280] 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.

[0281] 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.

[0282] 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.

[0283] 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.

[0284] 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).

[0285] 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).

[0286] 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.

[0287] 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.

[0288] (Variation Example)

[0289] 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.

[0290] 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).

[0291] Here, the parameter set may also be a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, a wireless frame structure, a specific filter processing performed by a transmitter and receiver in the frequency domain, a specific windowing processing performed by a transmitter and receiver in the time domain, and the like.

[0292] 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.

[0293] 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.

[0294] 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.

[0295] 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.

[0296] 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.

[0297] 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.

[0298] 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.

[0299] 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.

[0300] 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.

[0301] 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.

[0302] 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.

[0303] 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.

[0304] 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.

[0305] Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, common RBs may also be identified by the index of the RB relative to the common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0306] 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.

[0307] At least one of the configured BWPs may be activated, and the UE may not assume that it transmits or receives a specific channel / signal other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0308] 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.

[0309] 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.

[0310] 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.

[0311] 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.

[0312] 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.

[0313] 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.

[0314] 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.

[0315] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (Layer 1 / Layer 2 (L1 / L2)) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0316] 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).

[0317] 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).

[0318] 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.

[0319] 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.

[0320] 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.

[0321] 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.

[0322] 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.

[0323] 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.

[0324] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0325] 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.

[0326] 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.

[0327] 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.

[0328] 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.

[0329] In the present disclosure, operations are assumed to be performed by a base station, and sometimes by its upper node depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by a 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.

[0330] 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.

[0331] 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.).

[0332] 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”.

[0333] 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.

[0334] The term "determining" used in the present disclosure may include a variety of operations. For example, "determining" may also refer to situations where judging, calculating, computing, processing, deriving, investigating, looking up (for example, searching in a table, database or other data structure), ascertaining, etc. are regarded as performing "determining".

[0335] 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)".

[0336] 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.

[0337] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0338] 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".

[0339] 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.

[0340] 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 manner as "different".

[0341] 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.

[0342] 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.

[0343] 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 first radio resource control parameter (i.e., a first RRC parameter) of a TCI state that can be used as a transmission configuration indication state (i.e., TCI state) for a downlink (DL) and as a TCI state for an uplink (i.e., UL); and a control unit, determining whether the first RRC parameter is associated with a set of TCI states common to both DL and UL or a set of TCI states for DL, and determining a TCI state applied to at least one of a specific channel and a signal based on a media access control control element (MAC CE) for activating one or more TCI states in the set of TCI states common to both DL and UL or one or more TCI states in the set of TCI states for DL, and downlink control information (DCI) indicating at least one TCI state, The MAC CE includes a field indicating whether a second activated TCI state exists for a code point mapped to the field of the DCI, In a case where the first RRC parameter is associated with a set of TCI states for the DL, the receiving unit receives a second RRC parameter associated with a set of TCI states for the UL.

2. The terminal according to claim 1, wherein: At least one of the specific channels and signals includes a downlink shared channel, namely PDSCH, an uplink shared channel, namely PUSCH, a downlink control channel, namely PDCCH, an uplink control channel, namely PUCCH, a sounding reference signal, namely SRS, and a channel state information reference signal, namely CSI-RS.

3. A wireless communication method of a terminal, comprising: A step of receiving a first radio resource control parameter (i.e., a first RRC parameter) of a TCI state that can be used as both a transmission configuration indication state (i.e., TCI state) for a downlink (DL) and a TCI state for an uplink (i.e., UL); and a step of determining whether the first RRC parameter is associated with a set of TCI states common to both DL and UL or a set of TCI states for DL, and determining a TCI state applied to at least one of a specific channel and a signal based on a media access control control element (MAC CE) activating one or more TCI states in the set of TCI states common to both DL and UL or one or more TCI states in the set of TCI states for DL, and downlink control information (DCI) indicating at least one TCI state, The MAC CE includes a field indicating whether a second activated TCI state exists for a code point mapped to the field of the DCI, The wireless communication method further comprises: In case the first RRC parameter is associated with a set of TCI states for the DL, a step of receiving a second RRC parameter associated with a set of TCI states for UL.

4. A base station, comprising: a transmitting unit, transmitting to the terminal a first radio resource control parameter (i.e., a first RRC parameter) of a TCI state that can be used as a transmission configuration indication state (i.e., TCI state) for a downlink (DL) and as a TCI state for an uplink (i.e., UL); and a control unit, wherein the terminal determines whether the first RRC parameter is associated with a set of TCI states common to both DL and UL or a set of TCI states used for DL, and the terminal determines the TCI state applied to at least one of a specific channel and a signal based on a media access control control element (MAC CE) for activating one or more TCI states in the set of TCI states common to both DL and UL or one or more TCI states in the set of TCI states used for DL, and downlink control information (DCI) indicating at least one TCI state, The MAC CE includes a field indicating whether a second activated TCI state exists for a code point mapped to the field of the DCI, In a case where the first RRC parameter is associated with a set of TCI states for the DL, the sending unit sends a second RRC parameter associated with a set of TCI states for the UL to the terminal.

5. A system having a terminal and a base station, The terminal has: a receiving unit, receiving a first radio resource control parameter (i.e., a first RRC parameter) of a TCI state that can be used as a transmission configuration indication state (i.e., TCI state) for a downlink (DL) and as a TCI state for an uplink (i.e., UL); and a control unit, determining whether the first RRC parameter is associated with a set of TCI states common to both DL and UL or a set of TCI states for DL, and determining a TCI state applied to at least one of a specific channel and a signal based on a media access control control element (MAC CE) for activating one or more TCI states in the set of TCI states common to both DL and UL or one or more TCI states in the set of TCI states for DL, and downlink control information (DCI) indicating at least one TCI state, In a case where the first RRC parameter is associated with a set of TCI states for the DL, the receiving unit receives a second RRC parameter associated with a set of TCI states for the UL, The base station has: a sending unit, configured to send the first RRC parameter to the terminal; and a control unit, wherein the terminal determines whether the first RRC parameter is associated with a set of TCI states common to both the DL and the UL or a set of TCI states used for the DL, and the terminal determines the TCI state based on the MAC CE and the DCI, In a case where the first RRC parameter is associated with a set of TCI states for the DL, the sending unit sends the second RRC parameter to the terminal, The MAC CE includes a field indicating whether a second activated TCI state exists for a code point mapped to the field of the DCI.

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