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 medium access control element (MAC CE) indicating a transmission configuration indication (TCI) state; and a control unit for using the TCI state for a spatial relationship of a specific uplink signal at a timing later than sending a positive acknowledgement (ACK) for the MAC CE if a specific uplink signal satisfies an application condition. According to one embodiment of the present disclosure, a UL signal can be appropriately sent.

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] In the existing LTE system (e.g., 3GPP Rel.8-14), the user terminal (User Equipment (UE)) uses at least one of the UL data channel (e.g., Physical Uplink Shared Channel (PUSCH)) and the UL control channel (e.g., Physical Uplink Control Channel (PUCCH)) to send uplink control information (Uplink Control Information (UCI)).

[0005] Prior art literature

[0006] Non-patent literature

[0007] 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

[0008] Problems to be solved by the invention

[0009] In future wireless communication systems (e.g., NR), a study is being conducted on a user terminal (terminal, user terminal, User Equipment (UE)) controlling transmission and reception processing based on information related to Quasi-Co-Location (QCL)).

[0010] However, it is not clear how to switch the spatial relationship of the uplink signal and at least one of the path loss reference signals based on the update of the information related to the QCL of the downlink signal. If the UE does not properly switch the spatial relationship and at least one of the path loss reference signals, the UL signal cannot be properly sent, and there is a concern that the system performance will be reduced, such as a reduction in throughput.

[0011] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately transmit a UL signal.

[0012] Means for solving problems

[0013] A terminal involved in one method of the present disclosure comprises: a receiving unit, which receives a media access control-control element (MAC CE) indicating a send configuration indication (TCI) state; and a control unit, which, if a specific uplink signal meets an application condition, uses the TCI state in the spatial relationship of the specific uplink signal at a timing later than sending an affirmative acknowledgement (ACK) for the MAC CE.

[0014] Effects of the Invention

[0015] According to one aspect of the present disclosure, a UL signal can be appropriately transmitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram showing an example of measurement delay requirements in intra-frequency measurement.

[0017] Figure 2AAnd 2B is a diagram showing an example of a scaling factor taking into account the number of samples in L1-RSRP measurement and UE receive beam switching.

[0018] Figure 3A And 3B is a diagram showing an example of the L1-RSRP measurement period based on SSB.

[0019] Figure 4A and 4B is a diagram showing an example of a CSI-RS-based L1-RSRP measurement period.

[0020] Figure 5 This is a diagram showing an example of updating of the spatial relationship in Rel.15.

[0021] Figure 6 This is a diagram showing an example of updating of PL-RS in Rel.16.

[0022] Figure 7 This is a diagram showing an example of a timeline of switching of at least one of the default spatial relationship and the default PL-RS.

[0023] Figure 8 This is a diagram showing an example of a timeline of switching of the default PL-RS involved in Implementation Example 7.

[0024] Fig. 9 This is a diagram showing another example of the timeline of switching of the default PL-RS involved in Implementation Example 7.

[0025] Fig.10 This is a diagram showing an example of a timeline of switching of PL-RS involved in Implementation Example 8.

[0026] Fig.11 This is a diagram showing another example of the timeline of switching of the PL-RS involved in Implementation Example 8.

[0027] Fig.12 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0028] Fig.13 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0029] Fig.14 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0030] Fig.15 This is a diagram showing an example of the hardware configuration of a base station and a user terminal involved in one embodiment. DETAILED DESCRIPTION

[0031] (TCI, spatial relationship, QCL)

[0032] In NR, the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and the transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and encoding) in the UE based on the transmission configuration indication state (Transmission Configuration Indication state (TCI state)), the control signal, and at least one of the channels (expressed as signal / channel) are studied.

[0033] The TCI state may also represent the state of a signal / channel applied to a downlink. A state equivalent to the TCI state applied to a signal / channel applied to an uplink may also be expressed as a spatial relation.

[0034] The TCI state refers to information related to Quasi-Co-Location (QCL) of signals / channels, and may also be referred to as spatial reception parameters, spatial relationship information, etc. The TCI state may also be set for each channel or each signal to the UE.

[0035] QCL refers to an indicator of the statistical properties of a signal / channel. For example, when a certain signal / channel is in a QCL relationship with other signals / channels, it can also mean that 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 multiple signals / channels (at least one of these is QCL).

[0036] In addition, the spatial reception parameter may correspond to the reception beam of the UE (eg, reception analog beam), and the beam may 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).

[0037] QCL can also be specified in multiple types (QCL types). For example, four QCL types AD can be set to assume the same parameters (or parameter sets) but with different parameters. The parameters (also referred to as QCL parameters) are shown below:

[0038] QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay and delay spread,

[0039] QCL type B (QCL-B): Doppler shift and Doppler spread,

[0040] QCL Type C (QCL-C): Doppler shift and average delay,

[0041] QCL type D (QCL-D): spatial reception parameters.

[0042] The UE may also be assumed to be in a certain QCL (eg, QCL type D) relationship with other CORESETs, channels, or reference signals, which is 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] For example, the TCI state may be information related to the QCL of the target channel (in other words, the reference signal (RS) used for the channel) and other signals (such as other 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 high-layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

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

[0049] In addition, the RS that is in a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (SynchronizationSignal Block (SSB)), a channel state information reference signal (CSI-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called QRS).

[0050] 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.

[0051] The UE may also receive setting information of a list of information elements containing TCI states (eg, PDSCH-Config, tci-StatesToAddModList) through higher-layer signaling.

[0052] The information element of the TCI state set by high-level signaling (RRC's "TCI-state IE") may also include a TCI state ID and one or more QCL information ("QCL-Info"). The QCL information may also include at least one of information related to the RS that forms a QCL relationship (RS relationship information) and information indicating the QCL type (QCL type information). The RS relationship information may also include information such as the index of the RS (for example, SSB index, non-zero power CSI-RS (Non-Zero-Power (NZP) CSI-RS) resource ID (identifier (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] In Rel.15NR, both QCL type A RS and QCL type D RS, or only QCL type A RS, can be set for the UE as the TCI state of at least one of PDCCH and PDSCH.

[0054] When TRS is set as RS of QCL type A, it is assumed that TRS is different from the demodulation reference signal (DMRS) of PDCCH or PDSCH, and the same TRS is periodically transmitted over a long period of time. UE can measure TRS and calculate average delay, delay spread, etc.

[0055] For a UE in which the TRS is set as a QCL type A RS for the TCI state of the DMRS of the PDCCH or PDSCH, it can be assumed that the parameters (average delay, delay spread, etc.) of the QCL type A of the DMRS of the PDCCH or PDSCH and the TRS are the same, and therefore the parameters (average delay, delay spread, etc.) of the type A of the DMRS of the PDCCH or PDSCH can be obtained based on the measurement result of the TRS. When the UE performs channel estimation of at least one of the PDCCH and PDSCH, the measurement result of the TRS can be used to perform a more accurate channel estimation.

[0056] A UE to which a QCL type D RS is set can determine a UE reception beam (spatial domain reception filter, UE spatial domain reception filter) using the QCL type D RS.

[0057] The RS of QCL type X in the TCI state may also mean an RS that is in a QCL type X relationship with a certain channel / signal (DMRS), and the RS may also be referred to as a QCL source of QCL type X in the TCI state.

[0058] <TCI status for PDCCH>

[0059] The information related to the QCL between the PDCCH (or the DMRS antenna port associated with the PDCCH) and a certain RS can also be called the TCI state for the PDCCH, etc.

[0060] The UE may also determine the TCI state for the UE-specific PDCCH (CORESET) based on higher layer signaling. For example, one or more (K) TCI states may be set for the UE per CORESET through RRC signaling.

[0061] For each CORESET, the UE may also activate one of the multiple TCI states set by RRC signaling through a MAC CE. The MAC CE may also be referred to as a UE-specific PDCCH TCI state indication MAC CE (TCI State Indication for UE-specific PDCCH MAC CE). The UE may also monitor the CORESET based on the activated TCI state corresponding to the CORESET.

[0062] <TCI status for PDSCH>

[0063] The information related to the QCL between the PDSCH (or the DMRS antenna port associated with the PDSCH) and the DL-RS may also be referred to as the TCI state for the PDSCH, etc.

[0064] The UE may also be notified (set) of M (M≥1) TCI states for PDSCH (QCL information for M PDSCHs) through higher layer signaling. In addition, the number M of TCI states set for the UE may also be limited by at least one of the UE capability and the QCL type.

[0065] The DCI used for scheduling PDSCH may also include a field indicating the TCI state for the PDSCH (e.g., it may also be referred to as a TCI field, a TCI state field, etc.). The DCI may also be used for scheduling PDSCH of one cell, and may also be referred to as DL DCI, DL allocation, DCI format 1_0, DCI format 1_1, etc.

[0066] Whether the TCI field is included in the DCI may also be controlled by information notified from the base station to the UE. The information may also be information indicating whether the TCI field exists in the DCI (present or absent) (e.g., TCI existence information, TCI existence information in DCI, high-layer parameter TCI-PresentInDCI). The information may also be set to the UE through high-layer signaling, for example.

[0067] When more than 8 TCI states are set for the UE, MAC CE can also be used to activate (or specify) less than 8 TCI states. The MAC CE can also be called UE-specific PDSCH TCI state activation / deactivation MAC CE (TCI States Activation / Deactivation for UE-specific PDSCH MAC CE). The value of the TCI field in the DCI can also represent one of the TCI states activated by the MAC CE.

[0068] When the UE is set with TCI existence information set to "enabled" for the CORESET that schedules PDSCH (the CORESET used in the PDCCH transmission that schedules PDSCH), the UE may also assume that the TCI field exists in the DCI format 1_1 of the PDCCH transmitted on the CORESET.

[0069] In a case where TCI existence information is not set for the CORESET that schedules the PDSCH, or the PDSCH is scheduled through DCI format 1_0, when the time offset between the reception of the DL DCI (DCI that schedules the PDSCH) and the reception of the PDSCH corresponding to the DCI is greater than a threshold, in order to determine the QCL of the PDSCH antenna port, the UE may also assume that the TCI state or QCL assumption for the PDSCH is the same as the TCI state or QCL assumption applied for the CORESET used in the PDCCH transmission that schedules the PDSCH.

[0070] When TCI presence information is set to "enabled", when the TCI field in the DCI in the component carrier (CC) scheduling (PDSCH) indicates the activated TCI state in the scheduled CC or DL ​​BWP, and the PDSCH is scheduled via DCI format 1_1, in order to determine the QCL of the PDSCH antenna port, the UE may also use the TCI based on the value of the TCI field in the PDCCH detected to have the DCI. When the time offset between the reception of the DL DCI (scheduling the PDSCH) and the PDSCH corresponding to the DCI (PDSCH scheduled via the DCI) is greater than a threshold, the UE may also assume that the DM-RS port of the PDSCH of the serving cell is QCL with the following RS: the RS is in the TCI state associated with the QCL type parameter given by the indicated TCI state.

[0071] In the case where the UE is configured with a single time slot PDSCH, the indicated TCI state may also be based on the activated TCI state in the time slot with the scheduled PDSCH. In the case where the UE is configured with multiple time slot PDSCHs, the indicated TCI state may also be based on the activated TCI state in the initial time slot with the scheduled PDSCH, and the UE may also expect it to be the same throughout the time slots with the scheduled PDSCH. In the case where the UE is configured with a CORESET associated with a search space set for cross-carrier scheduling, when the UE sets the TCI presence information to "valid" for the CORESET, and at least one of the TCI states set for the service cell scheduled by the search space set includes QCL type D, the UE may also assume that the time offset between the detected PDCCH and the PDSCH corresponding to the PDCCH is greater than the threshold.

[0072] In RRC connection mode, in both the case where the TCI information (high-layer parameter TCI-PresentInDCI) in the DCI is set to "enabled" and the case where the TCI information is not set in the DCI, when the time offset between the reception of the DL DCI (DCI that schedules the PDSCH) and the corresponding PDSCH (the PDSCH scheduled by the DCI) is less than a threshold, the UE may also assume that the DM-RS port of the PDSCH of the serving cell is QCL with the following RS. The RS is an RS associated with the QCL parameter used in the QCL indication of the PDCCH of the CORESET associated with the monitored search space, and the CORESET has the smallest (lowest) CORESET-ID in the latest (most recent) time slot monitored by the UE among one or more CORESETs in the activated BWP of the serving cell. The RS may also be referred to as the default TCI state of the PDSCH or the default QCL assumption of the PDSCH.

[0073] The time offset between the reception of DL DCI and the reception of the PDSCH corresponding to the DCI may also be referred to as a scheduling offset.

[0074] In addition, the above-mentioned threshold may also be referred to as the time length for QCL (time duration), "timeDurationForQCL", "Threshold", "Threshold for offset between a DCI indicating a TCI stateand a PDSCH scheduled by the DCI", "Threshold-Sched-Offset", scheduling offset threshold, scheduling offset threshold, etc.

[0075] The QCL time length may be based on the UE capability or on delays related to, for example, decoding of the PDCCH and beam switching. The QCL time length may also be the minimum time required for the UE to receive the PDCCH and apply the spatial QCL information received in the DCI for PDSCH processing. The QCL time length may be expressed as the number of symbols per subcarrier interval or as time (e.g., μs). The information on the QCL time length may be reported from the UE to the base station as UE capability information or may be set from the base station to the UE using high-layer signaling.

[0076] For example, the UE may also assume that the DMRS port of the PDSCH and the DL-RS of the TCI state activated based on the CORESET corresponding to the smallest CORESET-ID are QCL. The latest time slot may also be a time slot for receiving the DCI scheduling the PDSCH, for example.

[0077] Alternatively, CORESET-ID may be an ID (an ID for identifying CORESET, controlResourceSetId) set by the RRC information element "ControlResourceSet".

[0078] When no CORESET is configured for a CC, the default TCI state may be the activated TCI state with the lowest ID applicable to the PDSCH within the activated DL BWP of the CC.

[0079] In Rel.16 and later, when the PDSCH and the PDCCH that schedules it exist in different component carriers (CC) (cross-carrier scheduling), if the delay from PDCCH to PDSCH (PDCCH-to-PDSCH delay) is shorter than the time length used for QCL, or if the TCI state does not exist in the DCI used for the scheduling, the UE can also obtain the QCL assumption for the scheduled PDSCH that can be applied to the PDSCH in the activated BWP of the scheduled cell and from the activated TCI state with the lowest ID.

[0080] <Spatial Relationship for PUCCH>

[0081] The UE may also be configured with parameters (PUCCH configuration information, PUCCH-Config) for PUCCH transmission through higher-layer signaling (e.g., Radio Resource Control (RRC) signaling). The PUCCH configuration information may also be configured for each band (e.g., uplink bandwidth part (Bandwidth Part (BWP))) within a carrier (also referred to as a cell, component carrier (CC)).

[0082] The PUCCH configuration information may also include a list of PUCCH resource set information (eg, PUCCH-ResourceSet) and a list of PUCCH spatial relationship information (eg, PUCCH-SpatialRelationInfo).

[0083] The PUCCH resource set information may also include a list (eg, resourceList) of PUCCH resource indices (IDs, eg, PUCCH-ResourceId).

[0084] In addition, when the UE does not have dedicated PUCCH resource setting information (e.g., dedicated PUCCH resource configuration) provided by the PUCCH resource set information in the PUCCH setting information (before RRC setting), the UE can also determine the PUCCH resource set based on parameters (e.g., pucch-ResourceCommon) in system information (e.g., System Information Block Type 1 (SIB1) or Remaining Minimum System Information (RMSI)). The PUCCH resource set can also include 16 PUCCH resources.

[0085] On the other hand, when the UE has the above-mentioned dedicated PUCCH resource setting information (UE-specific uplink control channel structure, dedicated PUCCH resource structure) (after RRC setting), the UE can also determine the PUCCH resource set based on the number of UCI information bits.

[0086] The UE may also determine the number of CCEs (N) in the control resource set (COntrol REsource SET (CORESET)) for receiving the PDCCH that transmits the DCI based on the value of a field (e.g., a PUCCH resource indicator field) in the downlink control information (downlink control information (DCI)) (e.g., DCI format 1_0 or 1_1 for scheduling PDSCH) and the number of CCEs (N) in the control resource set (COntrol REsource SET (CORESET)) for receiving the PDCCH that transmits the DCI. CCE ), the index of the first (initial) CCE received by the PDCCH (n CCE，0 ) to determine at least one of the PUCCH resource sets (for example, a PUCCH resource set determined cell-specifically or UE-specifically) for a PUCCH resource (index).

[0087] The PUCCH spatial relationship information (eg, "PUCCH-spatialRelationInfo" of the RRC information element) may also indicate multiple candidate beams (spatial domain filters) for PUCCH transmission. The PUCCH spatial relationship information may also indicate the spatial relationship between RS (Reference signal) and PUCCH.

[0088] The list of PUCCH spatial relationship information may also include several elements (PUCCH spatial relationship information IE (Information Element). Each PUCCH spatial relationship information may also include, for example, an index of the PUCCH spatial relationship information (ID, for example, pucch-SpatialRelationInfoId), an index of the serving cell (ID, for example, servingCellId), and at least one of the information related to the RS (reference RS) that has a spatial relationship with the PUCCH.

[0089] For example, the RS-related information may be an SSB index, a CSI-RS index (e.g., an NZP-CSI-RS resource structure ID), or an SRS resource ID and an ID of a BWP. The SSB index, the CSI-RS index, and the SRS resource ID may also be associated with at least one of the beams, resources, and ports selected by measuring the corresponding RS.

[0090] When more than one piece of spatial relation information related to PUCCH is set, the UE may be controlled based on PUCCH spatial relation Activation / Deactivation MAC CE (PUCCH spatial relation Activation / DeactivationMAC CE) to activate one piece of PUCCH spatial relation information for one PUCCH resource at a certain time.

[0091] The PUCCH spatial relationship activation / deactivation MAC CE of Rel-15 NR is expressed in a total of 3 octets (8 bits×3=24 bits) of octets (Octet, Oct) 1-3.

[0092] The MAC CE may also include information such as the serving cell ID ("Serving Cell ID" field) of the application object, the BWP ID ("BWP ID" field), and the PUCCH resource ID ("PUCCH Resource ID" field).

[0093] In addition, the MAC CE contains "S i ”(i=0-7) field. i When the field indicates 1, the UE activates the spatial relationship information of the spatial relationship information ID#i. i When the field indicates 0, the UE deactivates the spatial relationship information of the spatial relationship information ID#i.

[0094] 3 ms after sending a positive acknowledgement (ACK) for a MAC CE activating the PUCCH spatial relation information, the UE may also activate the PUCCH relation information specified by the MAC CE.

[0095] <Spatial Relationship for SRS and PUSCH>

[0096] The UE may also receive information (SRS configuration information, for example, parameters in the "SRS-Config" of the RRC control element) used in transmitting a measurement reference signal (for example, a sounding reference signal (SRS)).

[0097] 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, "RS-Resource" of the RRC control element).

[0098] One SRS resource set may be associated with a plurality of SRS resources (or a plurality 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).

[0099] 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.

[0100] 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 SRS (Aperiodic SRS (A-SRS, AP-SRS)). In addition, the UE may also send P-SRS and SP-SRS periodically (or periodically after activation), and send A-SRS based on the SRS request of the DCI.

[0101] In addition, the usage (RRC parameter "usage", L1 (Layer-1, Layer 1) parameter "SRS-SetUse") may also be, for example, beam management (beamManagement), codebook-based transmission (codebook: CB), non-codebook-based transmission (nonCodebook: NCB), antenna switching (antennaSwitching), etc. The SRS for the purpose of codebook-based transmission or non-codebook-based transmission may also determine the precoder used for codebook-based or non-codebook-based PUSCH transmission based on SRI.

[0102] 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.

[0103] SRS resource information may also include SRS resource ID (SRS-ResourceId), SRS port number, SRS port number, send comb, SRS resource mapping (such as 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.

[0104] The spatial relationship information of SRS (e.g., RRC information element "spatialRelationInfo") may also indicate the spatial relationship information between a reference signal and SRS. The reference signal may also be at least one of a synchronization signal / broadcast channel (SS / PBCH) block, a channel state information reference signal (CSI-RS), or an SRS (e.g., other SRS). The SS / PBCH block may also be referred to as a synchronization signal block (SSB).

[0105] As the index of the reference signal, the spatial relationship information of the SRS may include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID.

[0106] In addition, in the present disclosure, SSB index, SSB resource ID and SSBRI (SSB resource indicator) may also be replaced with each other. In addition, CSI-RS index, CSI-RS resource ID and CRI (CSI-RS Resource Indicator) may also be replaced with each other. In addition, SRS index, SRS resource ID and SRI may also be replaced with each other.

[0107] The spatial relationship information of SRS may also include a serving cell index, a BWP index (BWP ID), etc. corresponding to the above-mentioned reference signal.

[0108] In NR, the transmission of uplink signals can also be controlled based on the presence or absence of beam correspondence (BC). BC can also refer to, for example, the ability of a node (such as a base station or UE) to determine the beam used for sending signals (transmit beam, Tx beam) based on the beam used for receiving signals (receive beam, Rx beam).

[0109] In addition, BC can also be called transmit / receive beam correspondence (Tx / Rx beam correspondence), beam reciprocity (beam reciprocity), beam calibration (beam calibration), calibrated / non-calibrated (Calibrated / Non-calibrated), reciprocity calibrated / non-calibrated (reciprocity calibrated / non-calibrated), correspondence, consistency, etc.

[0110] For example, in the absence of BC, the UE sends uplink signals (such as PUSCH, PUCCH, SRS, etc.) based on the measurement results of more than one SRS (or SRS resources) using the same beam (spatial domain transmit filter) as the SRS (or SRS resources) indicated by the base station.

[0111] On the other hand, in the presence of BC, the UE may also use a beam (spatial domain transmit filter) that is the same as or corresponds to the beam (spatial domain receive filter) used for receiving SSB or CSI-RS (or CSI-RS resources) to send uplink signals (such as PUSCH, PUCCH, SRS, etc.).

[0112] In the case where spatial relationship information related to SSB, CSI-RS, and SRS is set for a certain SRS resource (for example, in the case of BC), 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.

[0113] In the case where spatial relationship information about a certain SRS (target SRS) resource and other SRS (reference SRS) and the SRS (target SRS) is set (for example, in the case of no BC), the UE may also use the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain transmit filter) used to transmit the reference SRS to transmit the target SRS resource. In other words, in this case, the UE may also assume that the UE transmit beam of the reference SRS is the same as the UE transmit beam of the target SRS.

[0114] The UE may also determine the spatial relationship of the PUSCH scheduled by the DCI based on the value of a field (e.g., an SRS resource identifier (SRI) field) in the DCI (e.g., DCI format 0_1). Specifically, the UE may also use the spatial relationship information (e.g., RRC information element "spatialRelationInfo") of the SRS resource determined based on the value of the field (e.g., SRI) for PUSCH transmission.

[0115] In the case of codebook-based transmission for PUSCH, the UE may be configured with 2 SRS resources through RRC, and one of the 2 SRS resources may be indicated through DCI (1-bit field). In the case of non-codebook-based transmission for PUSCH, the UE may be configured with 4 SRS resources through RRC, and one of the 4 SRS resources may be indicated through DCI (2-bit field). In order to use a spatial relationship other than the 2 or 4 spatial relationships configured through RRC, RRC reconfiguration becomes necessary.

[0116] In addition, the spatial relationship of SRS resources for PUSCH can be set for DL-RS. For example, for SP-SRS, the UE can be set with the spatial relationship of multiple (for example, up to 16) SRS resources through RRC, and one of the multiple SRS resources can be indicated through MAC CE.

[0117] (Path loss RS)

[0118] Path loss PL in transmission power control of each of PUSCH, PUCCH, and SRS b，f，c (q d )[dB] is the index q of the reference signal (RS, PathlossReferenceRS) for the downlink BWP associated with the activated UL BWP b of carrier f of serving cell c used by the UE d In the present disclosure, path loss reference RS, path loss (PL)-RS, index q d , RS for path loss calculation, RS resources for path loss calculation can also be replaced with each other. In the present disclosure, calculation, estimation, measurement, and tracking can also be replaced with each other.

[0119] It is being studied whether to change the existing structure of higher layer filtered RSRP used for path loss measurement when the path loss RS is updated through MAC CE.

[0120] In the case where the path loss RS is updated by the MAC CE, the path loss measurement based on L1-RSRP can also be applied. In the available timing after the MAC CE for the path loss RS update, the high-layer filtered RSRP is used for the path loss measurement, and the L1-RSRP can also be used for the path loss measurement before the high-layer filtered RSRP is applied. In the available timing after the MAC CE for the path loss RS update, the high-layer filtered RSRP is used for the path loss measurement, and the high-layer filtered RSRP of the previous path loss RS can also be used before this timing. Similar to the action of Rel.15, the high-layer filtered RSRP is used for path loss measurement, and the UE can also track all path loss RS candidates set by the RRC. The maximum number of path loss RSs that can be set by the RRC can also depend on the UE capability. In the case where the maximum number of path loss RSs that can be set by the RRC is X, X is set by the RRC to the next path loss RS candidate, and the MAC CE can also select the path loss RS from the set path loss RS candidates. The maximum number of path loss RSs that can be set by the RRC can also be 4, 8, 16, 64, etc.

[0121] In the present disclosure, high-layer filtered RSRP, filtered RSRP, and layer 3 filtered RSRP (layer 3 filtered RSRP) may also be interchangeable.

[0122] (Measurement delay requirements)

[0123] For radio resource management (RRM) measurements for layer 3 (L3) mobility, requirements for measurement delay for intra-frequency measurements are defined. Figure 1 As shown, measurement delay requirements are specified for each of cell detection, RSRP measurement, and SSB index detection.

[0124] Here, M pss / sss_sync_w / o_gaps For UEs supporting FR2 power class 1, it is 40, for UEs supporting power class 2, it is 24, for UEs supporting FR2 power class 3, it is 24, and for UEs supporting FR2 power class 4, it is 24. meas_period_w / o_gapsFor UEs supporting power class 1, it is 40, for UEs supporting FR2 power class 2, it is 24, for UEs supporting power class 3, it is 24, and for UEs supporting power class 4, it is 24. In the case where the intra-frequency SSB measurement timing configuration (SMTC) and the measurement gap (MG) do not overlap at all, or when the intra-frequency SMTC and MG overlap completely, K p = 1. When the SMTC and MG partially overlap in frequency, the measurement gap repetition period (MGRP) is used, K p =1 / (1-(SMTC period / MGRP)), SMTC period <MGRP。K RLM (K layer1_measurement ) is 1 or 1.5 based on the relationship between all reference signals set for radio link monitoring (RLM) outside the MG, beam failure detection (BFD), candidate beam detection (CBD), or beam reporting using L1-RSRP and the intra-frequency SMTC opportunities. intra is the carrier-specific scaling factor.

[0125] When DRX is present and the DRX cycle is less than 320 ms, the ceil function is set to 1.5 times the value in order to take into account the misalignment between the DRX on duration and the SMTC window.

[0126] In LTE, since measurements can be made frequently through CRS, the measurement delay requirement is 600ms for cell detection and synchronization + 200ms for RSRP measurement = a fixed value of 800ms. In NR, from the perspective of UE power consumption recommendations, in order to avoid unnecessary high-frequency measurements, 600ms for LTE cell detection and 200ms for LTE RSRP measurement are specified as lower limits. In NR, since the SMTC period is configurable, the measurement delay requirement based on the SMTC period is applied.

[0127] (L1-RSRP measurement / reporting)

[0128] The UE measures the value of Layer 1 (L1)-RSRP for each RS (each base station transmission beam) set by RRC.

[0129] For each L1-RSRP report, a measurement period is specified to indicate how many samples must be completed within the most recent previous sample. If the number of samples used in the RSRP measurement for one L1-RSRP report is set to M, the scaling factor that takes into account the repetition of SMTC or measurement gap (MG) is set to P, the scaling factor that takes into account the switching of UE receive beams is set to N, and the transmission period of SSB or CSI-RS is set to RS transmission period, the measurement period T in FR1 is expressed as M×P×RS transmission period, and the measurement period T in FR2 is expressed as M×N×P×RS transmission period.

[0130] Here, if Figure 2A As shown in FIG. 1 , when the time domain measurement restriction (timeRestrictionForChannelMeasurements) for channel (signal) measurement is set, or when the RS for L1-RSRP measurement is aperiodic CSI-RS, M=1, otherwise, M=3. Figure 2B As shown, when the L1-RSRP report is based on CSI-RS, N=1, when the L1-RSRP report is based on SSB, N=8, when the L1-RSRP report is based on CSI-RS with repetition and the number of CSI-RS resources is less than the maximum number of receive beams (maxNumberRxBeam), N=ceil(maxNumberRxBeam / number of CSI-RS resources).

[0131] The measurement accuracy of L1-RSRP based on 1 sample measurement is specified. Whether or not to average RSRP in L1 can also depend on UE implementation. If the time domain measurement restriction for channel measurement is set, the UE does not use averaging and reports 1 sample of RSRP as the L1-RSRP measurement result.

[0132] Figure 3A Indicates the L1-RSRP measurement period T based on SSB for FR1 L1-RSRP_Measurement_Period_SSB . Figure 3B Indicates the L1-RSRP measurement period T based on SSB for FR2 L1-RSRP_Measurement_Period_SSB Here, T SSB =ssb-periodicityServingCell is the period of the SSB index set for L1-RSRP measurement. DRX The DRX cycle is long. Report This is the period set for reporting.

[0133] Figure 4A Indicates the L1-RSRP measurement period T based on the CSI-RS for FR1 L1-RSRP_Measurement_Period_CSI-RS . Figure 4B Indicates the L1-RSRP measurement period T based on the CSI-RS for FR2 L1-RSRP_Measurement_Period_CSI-RS . T CSI-RS This requirement is applicable to the case where the CSI-RS configured for L1-RSRP measurement is transmitted at Density=3.

[0134] (Default spatial relationship and default PL-RS)

[0135] In Rel. 15, MAC CEs for activation / deactivation of PUCCH spatial relation and MAC CEs for activation / deactivation of SRS spatial relation are necessary. PUSCH spatial relation depends on SRS spatial relation.

[0136] In Rel. 16, at least one of the MAC CE for activation / deactivation of the PUCCH spatial relationship and the MAC CE for activation / deactivation of the SRS spatial relationship may not be used.

[0137] If neither the spatial relationship nor the PL-RS for PUCCH is set in FR2, the default assumption of the spatial relationship and PL-RS (default spatial relationship and default PL-RS) is applied to PUCCH. If neither the spatial relationship nor the PL-RS for SRS is set in FR2, the default assumption of the spatial relationship and PL-RS (default spatial relationship and default PL-RS) is applied to PUSCH and SRS scheduled by DCI format 0_1.

[0138] If the CORESET is set in the activated DL BWP on the CC, the default spatial relationship and the default PL-RS may also be the TCI state or QCL assumption of the CORESET with the lowest CORESET ID in the activated DL BWP. If the CORESET is not set in the activated DL BWP on the CC, the default spatial relationship and the default PL-RS may also be the activated TCI state with the lowest ID of the PDSCH in the activated DL BWP.

[0139] In Rel.15, the spatial relationship of the PUSCH scheduled by DCI format 0_0 is based on the spatial relationship of the PUCCH resource with the lowest PUCCH resource ID in the activated spatial relationship of the PUCCH on the same CC. Even if the PUCCH is not transmitted on the SCell, the network needs to update the PUCCH spatial relationship on all SCells.

[0140] In Rel. 16, PUCCH configuration for a PUSCH scheduled by DCI format 0_0 is not necessary. For a PUSCH scheduled by DCI format 0_0, a default spatial relationship and a default PL-RS are applied.

[0141] In order to accurately measure the path loss for transmission power control, Rel.15 UEs are configured with up to four PL-RSs through RRC signaling. Figure 5 As shown, even if the UL transmit beam (spatial relationship) is updated through MAC CE, the PL-RS cannot be updated through MAC CE.

[0142] like Figure 6 As shown, Rel.16 UE is configured with up to 64 PL-RSs through RRC signaling, and one PL-RS is indicated (activated) through MAC CE. The UE needs to track up to 4 activated PL-RSs for all UL channels (SRS, PUCCH, and PUSCH). Tracking PL-RSs can also be calculating the path loss based on the measurement of PL-RSs and maintaining (storing) the path loss.

[0143] For path loss calculation, high-level filtered RSRP (average of multiple RSRP measurements) is used. Figure 6 As shown, in the case where PL-RS is updated through MAC CE (PL-RS#1 in the PL-RS list set by RRC and different from the PL-RS (previous PL-RS) used for path loss calculation is indicated through MAC CE), the initial RSRP measurement instance 3ms after the ACK of the MAC CE is sent can also be used as the first RSRP measurement sample, and PL-RS#1 (which can also be used for path loss calculation) can be applied in the time slot boundary after the fifth RSRP measurement sample.

[0144] In the present disclosure, RSRP measurement, RSRP measurement sample, RSRP measurement resource, RSRP measurement timing, RSRP measurement instance, PL-RS measurement sample, PL-RS measurement resource, PL-RS measurement, PL-RS measurement timing, and PL-RS measurement instance may also be replaced with each other.

[0145] When the TCI state for PDCCH or PDSCH is updated through MAC CE, the PL-RS is also updated to the TCI state. In the case where the UE applies the default spatial relationship and the default PL-RS, it is not clear how to apply the updated PL-RS. Since the measurement for high-layer filtering RSRP takes time, the updated PL-RS cannot be applied immediately after the TCI state is updated.

[0146] (DL receive beam management)

[0147] The UE may also be set to more than one TCI state on the serving cell. The UE completes the switching of the activated TCI state within the delay time. When the activated TCI state is updated through the MAC CE, when the updated TCI state (target TCI state) is to be applied (how long the delay time is) depends on whether the target TCI state is known (known, measurement completed). When the target TCI is unknown (unknown, not measured), the UE may also apply the target TCI state after the target TCI becomes known.

[0148] If the following multiple known conditions for TCI state (conditions for considering the TCI state as known) are met, the target TCI state is known.

[0149] ·During the period from the last transmission of the RS resources used in the L1-RSRP measurement report for the target TCI state to the end of the activation of the TCI state switch (TCI switching period, TCI switching period), the RS resources used for L1-RSRP measurement are the RS within the target TCI state, or the RS with the target TCI state QCL.

[0150] During the TCI switching period, the TCI state switching command is received within 1280 ms from the last transmission of the RS resource for beam reporting or measurement.

[0151] During the TCI switching period, before the TCI state switching command, the UE sends at least one L1-RSRP report for the target TCI state.

[0152] During the TCI switching period, the target TCI state is in a detectable state.

[0153] During the TCI switching period, the SSB associated with the target TCI state is in a detectable state.

[0154] During the TCI switching period, the signal-to-noise ratio (SNR) of the target TCI state is greater than -3dB.

[0155] In the case where multiple known conditions for TCI states are not met, the target TCI state is unknown.

[0156] If the target TCI state is known, the UE can receive the PDSCH in time slot n+T according to the reception of the PDSCH transmitting the MAC CE activation command in time slot n. HARQ +(3ms+TO k *(T first-SSB +T SSB-proc )) / NR timeslot length before the TCI state switch occurred, with the PDCCH of the target TCI state. The UE can HARQ +(3ms+TO k *(T first-SSB )) / NR time slot length before, a PDCCH with an old (pre-update) TCI state is received.

[0157] Here, T HARQ It is the time between DL data transmission and acknowledgment. first-SSB It is the time from when the MAC CE command is decoded by the UE to when the first SSC is sent. SSB-proc 2ms. k It is 1 if the target TCI state does not exist in the activated TCI state list for PDSCH, otherwise it is 0.

[0158] If the target TCI state is unknown, based on the reception of the PDSCH transmitting the MAC CE activation command in time slot n, the UE can receive the PDSCH in time slot n+T HARQ +(3ms+T L1-RSRP +TO uk *(T first-SSB +T SSB-proc )) / NR timeslot length before the TCI state switch occurred, with the target TCI state of the serving cell. The UE receives the PDCCH of the serving cell with the target TCI state in timeslot n+T HARQ +(3ms+T L1-RSRP +TO uk *(T first-SSB )) / NR time slot length, it is possible to receive PDCCH with the old (pre-update) TCI state.

[0159] Here, T L1-RSRPis the time used for the improved L1-RSRP measurement of the receive beam. For SSB, T L1-RSRP M = 1, T Report = T when 0 L1-RSRP_Measurement_Period_SSB For CSI-RS T L1-RSRP For periodic CSI-RS and aperiodic CSI-RS when the number of resources in the resource set is at least equal to MaxNumberRxBeam, M = 1, T Report = T when 0 L1-RSRP_Measurement_Period_CSI-RS .TO uk It is 1 for CSI-RS based L1-RSRP measurement and 0 for SSB based L1-RSRP measurement when TCI state switching includes QCL type D. In addition, TO uk When the TCI state switching includes other QCL types, it is 1. When the TCI state switching includes only QCL type A, QCL type B, or QCL type C, for SSB in FR2, T L1-RSRP_Measurement_Period_SSB =0, T in FR2 L1-RSRP_Measurement_Period_CSI-RS = 0. In the case where the TCI state switching includes QCL type D, T first-SSB The time until the first SSB measurement after the L1-RSRP measurement. For other ALC types, T first-SSB The time until the first SSC is sent after the MAC CE command is decoded by the UE. For the target TCI state, the SSB is QCL type A or QCL type C.

[0160] In the case where the TCI state for PDCCH or PDSCH is updated through MAC CE, preferably, the UE applying the default spatial relationship combines the default spatial relationship with the updated TCI state. However, the timeline for switching the default spatial relationship is not clear. In addition, in the case where the TCI state updated through MAC CE is unknown, it is not clear how to switch the default spatial relationship.

[0161] Therefore, the inventors of the present invention have come up with a method for appropriately switching the default spatial relationship according to the update of the TCI status based on the MAC CE.

[0162] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the embodiments may be applied individually or in combination.

[0163] In the present disclosure, "A / B", "at least one of A and B" may also be replaced with each other. In the present disclosure, cell, CC, carrier, BWP, and band may also be replaced with each other. In the present disclosure, index, ID, indicator, and resource ID may also be replaced with each other. In the present disclosure, RRC parameters, high-layer parameters, RRC information elements (IEs), and RRC messages may also be replaced with each other.

[0164] In the present disclosure, TCI state, QCL assumption, QCL parameter, spatial domain reception filter, UE spatial domain reception filter, UE reception beam, DL reception beam, DL precoding, DL precoder, DL-RS, RS of QCL type D assumed by TCI state or QCL, RS of QCL type A assumed by TCI state or QCL may also be replaced with each other. In the present disclosure, RS of QCL type D, DL-RS associated with QCL type D, DL-RS with QCL type D, source of DL-RS, SSB, CSI-RS may also be replaced with each other.

[0165] In the present disclosure, spatial relationship, spatial relationship information, spatial relationship assumption, QCL parameters, spatial domain transmit filter, UE spatial domain transmit filter, UE transmit beam, UL transmit beam, UL precoding, UL precoder, RS of spatial relationship, DL-RS, QCL assumption, SRI, SRI-based spatial relationship, and UL TCI can also be replaced with each other.

[0166] In the present disclosure, TRS, tracking CSI-RS, CSI-RS with TRS information (higher layer parameter trs-Info), and NZP-CSI-RS resources in an NZP-CSI-RS resource set with TRS information may be replaced with each other.

[0167] In the present disclosure, DCI format 0_0, DCI not including SRI, DCI not including indication of spatial relationship, and DCI not including CIF may also be replaced with each other. In the present disclosure, DCI format 0_1, DCI including SRI, DCI including indication of spatial relationship, and DCI including CIF may also be replaced with each other.

[0168] In the present disclosure, dedicated PUCCH and PUCCH based on dedicated PUCCH configuration (PUCCH-Config) may also be replaced with each other. In the present disclosure, dedicated SRS and SRS based on dedicated SRS configuration (SRS-Config) may also be replaced with each other.

[0169] (Wireless Communication Method)

[0170] In the present disclosure, a specific UL signal and a specific type of UL signal may be interchangeable. A specific UL signal may also be at least one of PUCCH (dedicated PUCCH), SRS (dedicated SRS), PUSCH scheduled by DCI format 0_1, and PUSCH scheduled by DCI format 0_0.

[0171] In the present disclosure, specific DL signal, specific type of DL signal, specific DL channel, specific type of DL channel may be interchangeable. The specific DL signal may also be at least one of PDCCH, PDSCH, and CORESET.

[0172] In the present disclosure, the TCI state updated by MAC CE, the TCI state activated by MAC CE, the TCI state indicated by MAC CE, the target TCI state, the TCI state of the PL-RS activated by MAC CE, the default spatial relationship by a specific UL signal, and at least one referenced TCI state of the default PL-RS may also be replaced with each other. In the present disclosure, 3ms may also be replaced with a specific time. The specific time may also not be 3ms. The specific time may be specified by the specification, may be set by an RRC parameter, or may be a value reported by UE capability information.

[0173] If a specific UL signal meets the application conditions and the TCI state of a specific DL signal is updated through a MAC CE, the default spatial relationship of the specific UL signal and at least one of the default PL-RSs may be switched to a target TCI state according to a specific timeline.

[0174] The application condition may also be that at least one of the following is necessary, namely: the frequency of the specific UL signal is within a specific frequency range (FR), specific high-level parameters corresponding to the specific UL signal are set, specific UL signal conditions corresponding to the specific UL signal are met, and the target TCI state is known.

[0175] The specific frequency range may be either FR2 or outside FR1.

[0176] A specific high-level parameter may also correspond to a specific UL signal. When the specific UL signal is a PUSCH scheduled through DCI format 0_0, the corresponding specific high-level parameter may also be the default beam path loss validation information (enableDefaultBeamPlForPUSCH0_0). When the specific UL signal is a dedicated PUCCH, the corresponding specific high-level parameter may also be the default beam path loss validation information (enableDefaultBeamPlForPUCCH). When the specific UL signal is at least one of a dedicated SRS and a PUSCH scheduled through DCI format 0_1, the corresponding specific high-level parameter may also be the default beam path loss validation information (enableDefaultBeamPlForSRS).

[0177] The combination of the specific UL signal and the specific UL signal condition corresponding thereto may be at least one of the following specific UL signals 1 to 4 .

[0178] [Specific UL signal 1]

[0179] The specific UL signal is a dedicated PUCCH. The specific UL signal condition is that both the spatial relationship and the PL-RS are not set for the specific UL signal.

[0180] [Specific UL signal 2]

[0181] The specific UL signal is a dedicated SRS. The specific UL signal condition is that both the spatial relationship and the PL-RS are not set for the specific UL signal.

[0182] [Specific UL signal 3]

[0183] The specific UL signal is a PUSCH scheduled by DCI format 0_0. The specific UL signal condition is that for the specific UL signal, there is no PUCCH resource setting on the activated UL BWP or there is no activation spatial relationship on the PUCCH resource on the activated UL BWP.

[0184] [Specific UL signal 4]

[0185] The specific UL signal is a PUSCH scheduled by DCI format 0_1. The specific UL signal condition is that for the specific UL signal, the corresponding SRS resource (the SRS resource indicated by SRI) does not include a spatial relationship and a PL-RS.

[0186] If the CORESET is not configured in the activated DL BWP on the CC of the specific UL signal, the specific DL signal may also be the PDCCH. If the CORESET is not configured in the activated DL BWP on the CC of the specific UL signal, the specific DL signal may also be the PDSCH.

[0187] <Implementation Method 1>

[0188] If the application conditions are met and the TCI state of the specific DL signal is updated through MAC CE, at least one of the default spatial relationship and default PL-RS for the specific UL signal can also be switched according to the specific timeline. The specific timeline can also be based on any of the following timelines 1 and 2.

[0189] [Timeline 1]

[0190] The switching timeline of the default spatial relationship may also be the same as the switching timeline of the default PL-RS. In other words, the timing of switching from the previous spatial relationship to the target TCI state may also be the same as the timing of switching from the previous PL-RS to the target TCI state.

[0191] The UE may also calculate the switching time of the default PL-RS and the switching time of the default spatial relationship, and use the longer of the two calculated switching times as the switching time of both the default PL-RS and the default spatial relationship. The switching time may be the time from receiving the MAC CE that updates the TCI state to at least one switching of the default spatial relationship and the default PL-RS, or the time from sending the ACK for the MAC CE to at least one switching of the default spatial relationship and the default PL-RS, or the time from 3 ms after the ACK for the MAC CE is sent to at least one switching of the default spatial relationship and the default PL-RS.

[0192] According to timeline 1, the default spatial relationship and the default PL-RS can be always made the same, and the UE can appropriately calculate the transmission power.

[0193] [Timeline 2]

[0194] The switching timeline of the default spatial relationship may also be different from the switching timeline of the default PL-RS. The switching time of the default spatial relationship may also be shorter than the switching time of the default PL-RS. For example, the UE may also switch the default spatial relationship to the target TCI state 3ms after sending the ACK for the MAC CE that updates the TCI state, and thereafter switch the default PL-RS to the target TCI state.

[0195] According to timeline 2, the switching time of the default spatial relationship (UL transmission beam) can be shortened.

[0196] <Implementation Method 2>

[0197] If the application condition is met and the TCI state of a specific DL signal is updated through a MAC CE, at least one of the default spatial relationship and the default PL-RS may be switched to the TCI state according to a specific timeline.

[0198] When the TCI state (target TCI state) indicated by the MAC CE (activation command) is known, the UE may also switch the TCI state used for receiving a specific DL signal to the target TCI state 3ms after the ACK for the PDSCH transmitting the MAC CE is sent (DL switching timing). In a specific timeline, the UE may also switch the default spatial relationship of a specific UL signal and at least one of the default PL-RS to the target TCI state 3ms+offset after the ACK is sent (UL switching timing). In the present disclosure, the offset and the time offset may also be interchangeable.

[0199] For example, Figure 7 As shown, when MAC CE activates TCI state #1 and TCI state #1 is known, the UE switches the TCI state used for a specific DL signal to TCI state #1 at a timing of 3ms after sending the ACK for the MAC CE, and after an offset time from the timing, switches the default spatial relationship of the specific UL signal and at least one of the default PL-RS to TCI state #1.

[0200] According to Embodiment 2, even when the TCI state is updated through MAC CE, the UE can appropriately switch at least one of the default spatial relationship and the default PL-RS.

[0201] <Implementation Method 3>

[0202] The offset in Embodiment 2 may be set by an RRC parameter, may be specified in the specification, or may be a value reported by UE capability information. The offset may also be any one of the following offsets 1 to 5.

[0203] [Offset 1]

[0204] 0 (zero). The switching timing of at least one of the default spatial relationship and the default PL-RS may also be 3 ms after the ACK for the MAC CE is sent (or the switching timing of the TCI state when the target TCI state is known). The UL switching timing may also be the same as the DL switching timing.

[0205] [Offset 2]

[0206] x[ms] or x[timeslot]. x can be specified in the specification or set via RRC parameters. x can also depend on the subcarrier spacing (SCS) or the time slot length.

[0207] [Offset 3]

[0208] The offset used to switch the spatial relationship based on the MAC CE. The offset can be specified in the specification or set through RRC parameters. For example, when the target TCI state is known, the offset can also be TO k *(T first-SSB +T SSB-proc ). In the case where the target TCI state is unknown, the offset can also be T L1-RSRP +TO uk *(T first-SSB +T SSB-proc ).

[0209] [Offset 4]

[0210] The time required for TCI state switching when the target TCI state is unknown. For example, the offset can be based on the time T used for L1-RSRP measurement. L1-RSRP Time, can also be T L1-RSRP +TO uk *(T first-SSB +T SSB-proc ).

[0211] [Offset 5]

[0212] The time until the target TCI state changes from unknown to known. For example, the offset can be based on the time T used for L1-RSRP measurement. L1-RSRP Time, can also be T L1-RSRP .

[0213] According to Embodiment 3, the UE can switch at least one of the default spatial relationship and the default PL-RS at appropriate timing.

[0214] <Implementation Method 4>

[0215] The offset of implementation mode 3 may also depend on the type of at least one referenced parameter (reference parameter) through the default spatial relationship and the default PL-RS. In the present disclosure, the reference parameter, TCI state or QCL assumption, the reference parameter before the update, the reference parameter after the update, and the target TCI state may also be interchangeable.

[0216] The offset may also depend on at least one of the following reference parameter types 1 and 2.

[0217] [Type 1]

[0218] The offset depends on whether the reference parameter is the TCI state for PDCCH (CORESET) or the TCI state for PDSCH. The offset when the reference parameter is the TCI state for PDCCH may be different from the offset when the reference parameter is the TCI state for PDSCH.

[0219] The offset may also depend on whether CORESET is set in the activated DL BWP on the CC. The offset when CORESET is set in the activated DL BWP on the CC and the offset when CORESET is not set in the activated DL BWP on the CC may also be different from each other. In the case where CORESET is set in the activated DL BWP on the CC, the reference parameter is the TCI state for PDCCH. In the case where CORESET is not set in the activated DL BWP on the CC, the reference parameter is the TCI state for PDSCH.

[0220] [Type 2]

[0221] In the case where the reference parameter is the TCI state for PDCCH (CORESET) (in the case where CORESET is set to activate DL BWP on CC), the offset depends on whether the reference parameter is the TCI state or the QCL assumption. The offset when the reference parameter is the TCI state for PDCCH and the offset when the reference parameter is the TCI state for PDSCH may also be different from each other. In the case where the TCI state is set for CORESET, the UE uses the TCI state for PDCCH reception. In the case where the TCI state is not set for CORESET, the UE assumes that the SSB corresponding to the random access channel (RACH) transmission timing (the SSB identified by the UE in the initial access sequence) and the DM-RS antenna port associated with PDCCH reception are in a QCL relationship, and uses the QCL assumption for PDCCH reception.

[0222] According to Embodiment 4, the UE can use an appropriate offset according to at least one referenced RS through a default spatial relationship and a default PL-RS.

[0223] <Implementation method 5>

[0224] Regarding whether the target TCI state is known (known) or unknown (unknown), the offset of implementation mode 3 may have any of the following relationships 1 and 2.

[0225] [Relation 1]

[0226] The offset depends on whether the target TCI state is known or unknown. Different offsets may also be used between the case where the target TCI state is known and the case where the target TCI state is unknown.

[0227] When the target TCI state is known, the shorter of the two offsets (e.g., 0) may be used. When the target TCI state is unknown, the longer of the two offsets (e.g., greater than 0) may be used. The longer offset may be either offset 4 of implementation example 3 or offset 5 of implementation example 3.

[0228] [Relation 2]

[0229] The offset does not depend on whether the target TCI state is known or unknown. The same offset can also be used between the case where the target TCI state is known and the case where the target TCI state is unknown. The UE can also decide the receive beam / transmit beam based on the unknown TCI state (and can also decide / measure the RS of QCL type D).

[0230] According to Embodiment 5, regardless of whether at least one referenced RS of the default spatial relationship and the default PL-RS is known or unknown, the UE can use an appropriate offset.

[0231] <Implementation Method 6>

[0232] The UE may perform any of the following actions 1 and 2 during the period corresponding to the offset. The period corresponding to the offset may start from 3 ms after the ACK is sent for the MAC CE and have a length of the offset.

[0233] [Action 1]

[0234] The UE may also apply / assume the spatial relationship before updating to send a specific UL signal.

[0235] [Action 2]

[0236] The UE may also apply / assume the updated spatial relationship to send a specific UL signal. During a period corresponding to the offset, the performance requirement may also be relaxed. For example, the performance requirement may also be defined by at least one of a required SNR and a required error rate.

[0237] According to implementation 6, the UE is able to operate appropriately when switching between TCI states.

[0238] <Implementation Method 7>

[0239] When the target TCI state is activated by the MAC CE relative to at least one referenced TCI state of the default spatial relationship and the default PL-RS, and the target TCI state is known, the UE may also start counting the L1-RSRP measurement samples 3ms after sending the ACK for the MAC CE, and switch at least one of the default spatial relationship and the default PL-RS to the target TCI state in the next time slot of the Nth sample.

[0240] In the present disclosure, N may be specified in the specification, set through RRC parameters, or reported through UE capability information. For example, N may also be 5.

[0241] For example, Figure 8 As shown, when the MAC CE activates TCI state #1 relative to the TCI state referenced by the default PL-RS, and TCI state #1 is known, the UE may also use TCI state #1 for PL-RS in the next time slot of the 5th L1-RSRP measurement starting 3ms after the ACK for the MAC CE is sent.

[0242] When the target TCI state is activated by MAC CE relative to at least one referenced TCI state through the default spatial relationship and default PL-RS, and the target TCI state is unknown, the UE starts counting L1-RSRP measurement samples from the timing when the target TCI state becomes known (satisfying the known conditions for TCI), and in the next time slot of the Nth sample, switches the default spatial relationship and at least one of the default PL-RS to the target TCI state.

[0243] For example, Fig. 9 As shown, when the MAC CE activates TCI state #1 relative to the TCI state referenced by the default PL-RS, and TCI state #1 is unknown, the UE uses TCI state #1 for PL-RS in the next time slot of the 5th L1-RSRP measurement from the timing when TCI state #1 becomes known.

[0244] According to Embodiment 7, the UE can switch the default PL-RS at an appropriate timing.

[0245] <Implementation Method 8>

[0246] like Figure 6 When the PL-RS list is set through RRC parameters and a PL-RS different from the PL-RS used for path loss calculation (previous PL-RS) is activated through MAC CE, the UE can also switch the PL-RS using the same timeline as implementation mode 7.

[0247] When a PL-RS different from the previous PL-RS is activated through MAC CE and the TCI status of the activated PL-RS is known, the UE may also start counting the L1-RSRP measurement samples 3ms after sending the ACK for the MAC CE, and switch the previous PL-RS to the activated PL-RS in the next time slot of the Nth sample.

[0248] For example, Fig.10 As shown, when MAC CE activates PL-RS#1 which is different from the previous PL-RS and the TCI state of PL-RS#1 is known, the UE switches the previous PL-RS to PL-RS#1 in the next time slot starting the 5th L1-RSRP measurement 3ms after sending the ACK for the MAC CE.

[0249] When a PL-RS different from the previous PL-RS is activated through MAC CE and the TCI status of the activated PL-RS is unknown, the UE may also start counting L1-RSRP measurement samples when the TCI status of the activated PL-RS becomes known (satisfies the known conditions for TCI), and switch the previous PL-RS to the activated PL-RS in the next time slot of the Nth sample.

[0250] For example, Fig.11 As shown, when MAC CE activates PL-RS#1 which is different from the previous PL-RS and the TCI state of PL-RS#1 is unknown, the UE may also switch the previous PL-RS to PL-RS#1 in the next time slot of the 5th L1-RSRP measurement starting from the timing when the TCI state of PL-RS#1 becomes known.

[0251] According to Embodiment 8, the UE can switch the PL-RS at appropriate timing.

[0252] (Wireless Communication System)

[0253] 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 or a combination of the wireless communication methods according to the above-described embodiments of the present disclosure.

[0254] Fig.121 is a diagram showing an example of a schematic structure of a wireless communication system according to an 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.

[0255] 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.

[0256] 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.

[0257] 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)).

[0258] 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 the 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 the base station 10.

[0259] 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).

[0260] 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 (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 this. For example, FR1 may also correspond to a frequency band higher than FR2.

[0261] 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).

[0262] Multiple base stations 10 may also be connected by wire (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station may also be referred to as an IAB node.

[0263] 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.

[0264] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0265] 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.

[0266] 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 applied to the UL and DL radio access schemes.

[0267] In the wireless communication system 1, as downlink channels, 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)) and the like may be used.

[0268] In addition, in the wireless communication system 1, 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 may be used.

[0269] The PDSCH is used to transmit user data, high-layer control information, system information block (SIB), etc. The PUSCH is also used to transmit user data, high-layer control information, etc. In addition, the PBCH is also used to transmit the master information block (MIB).

[0270] 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.

[0271] In addition, the DCI for scheduling PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, PDSCH may also be interpreted as DL data, and PUSCH may also be interpreted as UL data.

[0272] 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. One CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a certain search space based on the search space setting.

[0273] A search space may also correspond to PDCCH candidates that are consistent with 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.

[0274] The PUCCH may also be used to transmit at least one uplink control information (uplink control information (UCI)) including channel state information (CSI), delivery confirmation information (e.g., may also be called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (Scheduling Request (SR)). The random access preamble code used to establish a connection with a cell may also be transmitted through the PRACH.

[0275] In the present disclosure, downlink, uplink, etc. may be expressed without "link". In addition, various channels may be expressed without "Physical" at the beginning.

[0276] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, as DL-RS, 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. may also be transmitted.

[0277] 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 an SS / PBCH block, SS block (SS Block (SSB)), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0278] 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).

[0279] (Base Station)

[0280] Fig.13 A diagram showing an example of a configuration of a base station according to an 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 be provided in one or more portions.

[0281] In addition, in this example, the functional blocks of the characteristic parts of 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 be omitted.

[0282] 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 the common knowledge in the technical field to which the present disclosure relates.

[0283] 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.

[0284] 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 public knowledge in the technical field involved in the present disclosure.

[0285] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured by a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0286] The transmitting / receiving antenna 130 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, for example, an array antenna.

[0287] 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.

[0288] 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.

[0289] 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.

[0290] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filtering, discrete Fourier transform (DFT)) processing (as needed), 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.

[0291] The transmitting and receiving unit 120 (RF unit 122 ) may perform modulation, filtering, 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 .

[0292] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may perform amplification, filtering, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0293] 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), filtering 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.

[0294] 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.

[0295] 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.

[0296] In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmitting and receiving unit 120 , the transmitting and receiving antenna 130 , and the transmission path interface 140 .

[0297] The transmitting and receiving unit 120 may also transmit a medium access control-control element (MAC CE) indicating a transmission setting indication (TCI) state. If a specific uplink signal satisfies an application condition, the transmitting and receiving unit 120 may also receive the specific uplink signal that transmits the TCI state using a spatial relationship at a timing later than a positive acknowledgement (ACK) is transmitted for the MAC CE.

[0298] (User Terminal)

[0299] Fig.14The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. In addition, the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may be provided in one or more pieces.

[0300] 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 user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0301] 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 the common knowledge in the technical field to which the present disclosure relates.

[0302] 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.

[0303] 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 public knowledge in the technical field involved in the present disclosure.

[0304] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured by a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0305] The transmitting / receiving antenna 230 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0306] 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.

[0307] 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.

[0308] 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.

[0309] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filtering, 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.

[0310] 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 activated (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.

[0311] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filtering, 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 .

[0312] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may perform amplification, filtering, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230 .

[0313] The sending and receiving unit 220 (receiving processing unit 2212) can also apply analog-to-digital conversion, FFT processing, IDFT processing (as needed), filtering 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.

[0314] 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.

[0315] In addition, the transmission unit and the reception unit of the user terminal 20 in the present disclosure may be constituted by at least one of the transmission / reception unit 220 and the transmission / reception antenna 230 .

[0316] The transmitting and receiving unit 220 may also receive a medium access control-control element (MAC CE) indicating a transmission setting indication (TCI) state. If a specific uplink signal meets the application condition, the control unit 210 may also use the TCI state for the spatial relationship of the specific uplink signal (e.g., the default spatial relationship and at least one of the default PL-RS) at a timing later than the positive acknowledgement (ACK) transmission of the MAC CE (e.g., UL switching timing).

[0317] The timing may also be after 3ms+time offset from the sending of the ACK.

[0318] The time offset when the TCI state is set for a physical downlink control channel and the time offset when the TCI state is set for a physical downlink shared channel may be different from each other.

[0319] The offset when the TCI state satisfies a condition for being regarded as known may also be different from the offset when the TCI state does not satisfy the condition.

[0320] (Hardware Structure)

[0321] 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.

[0322] 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.

[0323] 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.11 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0324] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. are interchangeable. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0325] 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.

[0326] 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.

[0327] 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.

[0328] 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 enables 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.

[0329] 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 read-only memory (EPROM), an electrically erasable programmable read-only memory (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.

[0330] 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)), etc.), a digital versatile disk, a 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 appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0331] 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 can 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. can also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) can also be installed by the transmitting unit 120a (220a) and the receiving unit 120b (220b) separately physically or logically.

[0332] 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).

[0333] 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 different buses may be used between the devices.

[0334] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and the hardware may also be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented by at least one of these hardware.

[0335] (Variation Example)

[0336] 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.

[0337] 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).

[0338] Here, the parameter set may also refer to 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 the subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, wireless frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, etc.

[0339] 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.

[0340] 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.

[0341] 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.

[0342] For example, a subframe may also be referred to as a TTI, a plurality of consecutive subframes may also be referred to as a TTI, and a time slot or a mini time slot may also be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may also be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0343] 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.

[0344] 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 also be shorter than the TTI.

[0345] In addition, when one time slot or one mini time slot is referred to as TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) may 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 may also be controlled.

[0346] 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.

[0347] In addition, long TTI (e.g., normal TTI, subframe, etc.) can also be interpreted as a TTI with a time length exceeding 1 ms, and short TTI (e.g., shortened TTI, etc.) can also be interpreted as a TTI with a TTI length less than that of long TTI and greater than 1 ms.

[0348] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may also include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0349] 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.

[0350] 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.

[0351] In addition, a resource block may also be composed of one or more resource elements (RE). For example, one RE may also be a radio resource region of one subcarrier and one symbol.

[0352] A Bandwidth Part (BWP) (also referred to as a partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, a common RB may also be identified by an index of the RB relative to a common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0353] 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.

[0354] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive a specific signal / channel other than the activated BWP. In addition, "cell", "carrier" and the like in the present disclosure may also be interpreted as "BWP".

[0355] 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.

[0356] 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.

[0357] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. In addition, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. The 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.

[0358] Information, signals, etc. described in the present 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.

[0359] Furthermore, information, signals, etc. can be output from a high layer (upper layer) to a low layer (lower layer) or from a low layer to a high layer. Information, signals, etc. can also be input and output via a plurality of network nodes.

[0360] 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.

[0361] 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.

[0362] 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)).

[0363] 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).

[0364] 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).

[0365] 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.

[0366] 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.

[0367] 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.

[0368] 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.

[0369] 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 cell, and pico cell.

[0370] 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.

[0371] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” are used interchangeably.

[0372] In some cases, the mobile station is also referred to as a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a hand set, a user agent, a mobile client, a client, or some other appropriate terminology.

[0373] 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.

[0374] In addition, the base station in the present disclosure can also be interpreted as a user terminal. For example, the various methods / implementations of the present disclosure can 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 can also be called device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the user terminal 20 has the functions of the above-mentioned base station 10. In addition, expressions such as "uplink" and "downlink" can also be interpreted as expressions corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can also be interpreted as side channels.

[0375] Likewise, the user terminal in the present disclosure may also be interpreted as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0376] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node according to the circumstances. Obviously, in a network including one or more network nodes having a base station, various actions performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, Mobility Management Entity (MME)), Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0377] 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.

[0378] The various modes and embodiments described in the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER3G, 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 (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 based on them. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0379] The term “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the term “based on” means both “based only on” and “based at least on”.

[0380] 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 a first and a second element 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.

[0381] The term "determining" as used in this disclosure may include a variety of actions in some cases. For example, "determining" may also be viewed as "judging", calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), ascertaining, etc.

[0382] In addition, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on receiving (for example, receiving information), transmitting (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc.

[0383] In addition, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on some actions.

[0384] In addition, "judgment (decision)" can also be interpreted as "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0385] The "maximum transmit power" recorded in the present disclosure may mean the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0386] The terms "connected", "coupled", or all their variations used in this disclosure mean all direct or indirect connections or combinations between two or more elements, and may include the situation where there are one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The combination or connection between the elements may be physical, logical, or a combination of these. For example, "connection" may also be interpreted as "access".

[0387] In the present disclosure, when two elements are connected, it can be considered that they are "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.

[0388] 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 as "different".

[0389] In the present disclosure, when the terms "include", "including", and their variations are used, these terms, like the term "comprising", have an inclusive meaning. Furthermore, the term "or" used in the present disclosure does not mean an exclusive OR.

[0390] 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.

[0391] 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 present 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 receives a medium access control element (MAC CE) indicating a transmission setting indication state (TCI state) of a control resource set (CORESET); and A control unit, when high-level parameters representing default beam path loss activation information of a measurement reference signal, i.e., SRS, are set and neither spatial relationship information nor a path loss reference signal, i.e., PL-RS, is set for the SRS, uses the TCI state for the spatial relationship of the SRS at a timing later than the sending of an affirmative response, i.e., ACK, of the MAC CE indicating the TCI state of the CORESET.

2. The terminal according to claim 1, wherein: The timing is after 3ms+time offset from when the ACK is sent.

3. The terminal according to claim 2, wherein: The time offset when the TCI status is known and the time offset when the TCI status is unknown are different from each other.

4. The terminal according to claim 3, wherein: The time offset when the TCI state is unknown is based on the time used for layer 1-reference signal received power measurement, i.e., L1-RSRP measurement.

5. A wireless communication method, which is a wireless communication method of a terminal, comprising: The step of receiving a medium access control element (MAC CE) indicating a transmission setting indication state (TCI state) of a control resource set (CORESET); and When high-level parameters representing default beam path loss activation information of a measurement reference signal, i.e., SRS, are set and neither spatial relationship information nor path loss reference signal, i.e., PL-RS, is set for the SRS, a step of using the TCI state for the spatial relationship of the SRS is performed at a timing later than the sending of an affirmative acknowledgment, i.e., ACK, of the MAC CE indicating the TCI state of the CORESET.

6. A base station, comprising: a sending unit, sending a medium access control element (MAC CE) indicating a sending setting indication state (TCI state) of a control resource set (CORESET); and A receiving unit receives the SRS sent by using the TCI state for spatial relationship after a timing later than the sending of an affirmative acknowledgment, i.e., ACK, of the MAC CE indicating the TCI state of the CORESET, when a high-level parameter indicating the default beam path loss activation information of a measurement reference signal, i.e., SRS, is set and both the spatial relationship information and the path loss reference signal, i.e., PL-RS, are not set for the SRS.

7. A system having a terminal and a base station, The terminal has: A receiving unit receives a medium access control element (MAC CE) indicating a transmission setting indication state (TCI state) of a control resource set (CORESET); and A control unit, when a high-level parameter indicating default beam path loss validation information of a measurement reference signal (SRS) is set and both spatial relationship information and a path loss reference signal (PL-RS) are not set for the SRS, uses the TCI state for the spatial relationship of the SRS at a timing later than the transmission of an affirmative response (ACK) to the MAC CE indicating the TCI state of the CORESET, The base station has a sending unit that sends the MAC CE indicating the TCI state of the CORESET.

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