Terminal, wireless communication method, and base station

Abstract

A terminal according to an embodiment of the present disclosure includes a reception unit that receives a medium access control - control element (MAC CE) indicating transmission of a configuration indication state (TCI state) or a reference signal of a path loss reference signal (PL- RS), and a control unit that uses the reference signal in path loss calculation of a specific uplink signal if the specific uplink signal satisfies an application condition, at a timing later than an acknowledgement transmission (ACK transmission) for the MAC CE. According to an embodiment of the present disclosure, an UL signal can be appropriately transmitted.

Description

Technical Field

[0001] This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems. Background Technology

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) was standardized with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was standardized with the aim of further increasing capacity and improving the height of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] The development of successor systems to LTE is also underway (e.g., also known as the 5th generation mobile communication system (5G), 5G+, the 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.).

[0004] In existing LTE systems (e.g., 3GPP Rel.8-14), 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 transmit uplink control information (UCI).

[0005] Existing technical documents

[0006] Non-patent literature

[0007] Non-patent document 1: 3GPP TS 36.300V8.12.0 "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] The problem that the invention aims to solve

[0009] In future wireless communication systems (e.g., NR), research is underway on how user terminals (terminals, user equipment (UE)) can control transmission and reception processes based on information related to quasi-co-location (QCL).

[0010] However, it is unclear how to switch at least one of the spatial relationships and path loss reference signals of the uplink signal based on updates to information related to the QCL of the downlink signal. If the UE cannot properly switch at least one of the spatial relationships and path loss reference signals, it will be unable to properly transmit the UL signal, leading to concerns about reduced throughput and degraded system performance.

[0011] Therefore, one of the objectives of this disclosure is to provide a suitable terminal for transmitting UL signals, a wireless communication method, and a base station.

[0012] Methods for solving problems

[0013] One aspect of this disclosure relates to a terminal comprising: a receiving unit that receives a Media Access Control-Control Element (MACCE) for indicating the transmission of a reference signal for a Set Indication State (TCI) or a Path Loss Reference Signal (PL-RS); and a control unit that, when a specific uplink signal meets application conditions, uses the reference signal in a path loss calculation for the specific uplink signal at a timing later than the transmission of an acknowledgment (ACK) for the MAC CE.

[0014] Invention Effects

[0015] According to one method of this disclosure, a UL signal can be appropriately transmitted. Attached Figure Description

[0016] Figure 1 This is a diagram illustrating an example of the measurement delay requirement in frequency measurements.

[0017] Figure 2A as well as Figure 2B This is a diagram illustrating an example that takes into account the number of samples in L1-RSRP measurements and the scaling factor for UE receive beam switching.

[0018] Figure 3A as well as Figure 3B This is a diagram illustrating an example of L1-RSRP measurement based on SSB.

[0019] Figure 4A as well as Figure 4B This is a diagram illustrating an example of L1-RSRP measurement based on CSI-RS.

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

[0021] Figure 6 This is a diagram illustrating an example of an update to the PL-RS in Rel.16.

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

[0023] Figure 8 This is a diagram illustrating an example of the timeline for switching the default PL-RS according to Embodiment 7.

[0024] Figure 9 This is a diagram illustrating another example of the timeline for switching the default PL-RS as described in Implementation 7.

[0025] Figure 10 This is a diagram showing yet another example of the timeline for switching the default PL-RS according to Implementation 7.

[0026] Figure 11 This is a diagram illustrating an example of the timeline for switching of the PL-RS according to Embodiment 8.

[0027] Figure 12 This is a diagram showing another example of the timeline for switching of the PL-RS according to Embodiment 8.

[0028] Figure 13 This is a diagram showing yet another example of the timeline for switching of the PL-RS according to Embodiment 8.

[0029] Figure 14 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment.

[0030] Figure 15This is a diagram illustrating an example of the structure of a base station according to one embodiment.

[0031] Figure 16 This is a diagram illustrating an example of the structure of a user terminal according to one embodiment.

[0032] Figure 17 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment. Detailed Implementation

[0033] (TCI, Spatial Relations, QCL)

[0034] In NR, research is being conducted on receiving processes (e.g., at least one of receiving, demapping, demodulation, and decoding) and transmitting processes (e.g., at least one of transmitting, mapping, precoding, modulation, and encoding) in a UE that control at least one of the signals and channels (referred to as signals / channels) based on the Transmission Configuration Indication state (TCI state).

[0035] TCI states can also represent the states of signals / channels applied to the downlink. States equivalent to the TCI states of signals / channels applied to the uplink can also be described as spatial relations.

[0036] The TCI status refers to information related to the quasi-co-location (QCL) of a signal / channel, and can also be called spatial reception parameters, spatial relation information, etc. The TCI status can be set for the UE on a per-channel or per-signal basis.

[0037] QCL stands for Statistical Indicator, representing the statistical properties of a signal / channel. For example, it can also mean that, given a QCL relationship between a signal / channel and other signals / channels, it can be assumed that at least one of the following is identical (QCL): Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter).

[0038] Additionally, the spatial reception parameters may also correspond to the UE's receive beam (e.g., receive analog beam), and the beam may also be determined based on the spatial QCL. The QCL (or at least one element of the QCL) in this disclosure may also be replaced with sQCL (spatial QCL).

[0039] Regarding QCL, multiple types (QCL types) can also be specified. For example, four QCL types AD can be set, in which the parameters (or parameter sets) that can be assumed to be the same are different. The parameters (also referred to as QCL parameters) are represented as follows:

[0040] • QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread;

[0041] • QCL Type B (QCL-B): Doppler shift and Doppler extension;

[0042] • QCL Type C (QCL-C): Doppler shift and average delay;

[0043] • QCL type D (QCL-D): Space reception parameters.

[0044] The UE envisions a relationship between a certain Control Resource Set (CORESET), channel, or reference signal and other CORESETs, channels, or reference signals in a specific QCL (e.g., QCL type D). This situation can also be referred to as QCL assumption.

[0045] 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 state or QCL assumption of the signal / channel.

[0046] TCI status can also be, for example, information related to the QCL between the target channel (in other words, the reference signal (RS) used by the channel) and other signals (e.g., other RS). TCI status can also be set (indicated) by higher-layer signaling, physical-layer signaling, or a combination thereof.

[0047] In this disclosure, higher-level signaling may be, for example, any one or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc.

[0048] MAC signaling can also use MAC Control Element (MAC CE) or MAC Protocol Data Unit (PDU). Broadcast information can also be Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), or Other System Information (OSI).

[0049] Physical layer signaling can also be, for example, downlink control information (Downlink Control Information (DCI)).

[0050] The channel that is set (specified) to TCI state or spatial relationship can be, for example, at least one of the following: downlink shared channel (Physical Downlink Shared Channel (PDSCH))), downlink control channel (Physical Downlink Control Channel (PDCCH))), uplink shared channel (Physical Uplink Shared Channel (PUSCH))), and uplink control channel (Physical Uplink Control Channel (PUCCH))).

[0051] Furthermore, the RS that is related to the channel as QCL can be at least one of the following: a Synchronization Signal Block (SSB), a Channel State Information Reference Signal (CSI-RS), a Measurement Reference Signal (Sounding Reference Signal (SRS)), a Tracking CSI-RS (also known as a Tracking Reference Signal (TRS)), or a QCL Detection Reference Signal (also known as a QRS).

[0052] An SSB is a block of signals that contains at least one Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and broadcast channel (Physical Broadcast Channel (PBCH)). An SSB can also be referred to as an SS / PBCH block.

[0053] The UE can also receive configuration information (e.g., PDSCH-Config, tci-StatesToAddModList) containing a list of information elements of TCI state via higher-layer signaling.

[0054] The TCI state information element (RRC's "TCI-state IE") set via higher-layer signaling may also include a TCI state ID and one or more QCL information ("QCL-Info"). The QCL information may also include at least one 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 RS's index (e.g., SSB index, Non-Zero-Power (NZP) CSI-RS resource ID (identifier)), the cell index of the RS, and the Bandwidth Part (BWP) index of the RS.

[0055] In Rel.15NR, either the RS of QCL type A or the RS of QCL type D, or only the RS of QCL type A, can be set to the UE as a TCI state of at least one of PDCCH and PDSCH.

[0056] When the RS is set as QCL type A, it is assumed that the TRS is different from the DeModulation Reference Signal (DMRS) of the PDCCH or PDSCH, and the same TRS is periodically transmitted for a long time. The UE can measure the TRS and calculate the average delay, delay spread, etc.

[0057] For a UE whose TRS is set as a QCL type A RS in 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 DMRS of the PDCCH or PDSCH are the same as those of the QCL type A of the TRS. Therefore, the parameters (average delay, delay spread, etc.) of the type A DMRS of the PDCCH or PDSCH can be calculated based on the measurement results of the TRS. When performing channel estimation for at least one of the PDCCH and PDSCH, the UE can use the measurement results of the TRS to perform more accurate channel estimation.

[0058] A UE with a QCL type D RS can use the QCL type D RS to determine the UE receive beam (spatial domain receive filter, UE spatial domain receive filter).

[0059] The RS of QCL type X in TCI state can also represent the RS that is in a relationship of QCL type X with a certain channel / signal (DMRS), and this RS can also be called the QCL source of QCL type X in TCI state.

[0060] <TCI status for PDCCH>

[0061] 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 referred to as the TCI status for the PDCCH, etc.

[0062] The UE can also determine the TCI state for a UE-specific PDCCH (CORESET) based on higher-layer signaling. For example, one or more (K) TCI states can be set for each UE via RRC signaling per CORESET.

[0063] The UE can also activate one of multiple TCI states set via RRC signaling for each CORESET via a MAC CE. This MAC CE can also be called the UE-specific PDCCH TCI State Indication MAC CE. The UE can also monitor the CORESET based on the activated TCI state corresponding to that CORESET.

[0064] <TCI status for PDSCH>

[0065] The information related to the QCL between the PDSCH (or the DMRS antenna port associated with the PDSCH) and a certain DL-RS can also be referred to as the TCI status for the PDSCH, etc.

[0066] The UE can also be notified (set) M (M≥1) TCI states (M QCL information used by PDSCH) via higher-layer signaling. In addition, the number M of TCI states set to the UE can also be limited by at least one of the UE capabilities and QCL types.

[0067] The DCI used in PDSCH scheduling can also contain a field indicating the TCI status used by that PDSCH (e.g., it can also be called a TCI field, TCI status field, etc.). This DCI can also be used for PDSCH scheduling in a cell, and can also be called DLDCI, DL allocation, DCI format 1_0, DCI format 1_1, etc.

[0068] Whether a TCI field is included in the DCI can also be controlled through information notified to the UE from the base station. This information can also be information indicating whether the TCI field exists (present or absent) within the DCI (e.g., TCI presence information, TCI presence within DCI, higher-layer parameter TCI-PresentInDCI). This information can also be set to the UE via higher-layer signaling, for example.

[0069] When more than eight TCI states are assigned to the UE, a MAC CE can also be used to activate (or specify) fewer than eight TCI states. This MAC CE can also be referred to as a UE-specific PDSCH MAC CE (TCI States Activation / Deactivation for UE-specific PDSCH). The value of the TCI field within the DCI can also represent one of the TCI states activated by the MAC CE.

[0070] If the UE is set to "enabled" for the CORESET of the scheduled PDSCH (the CORESET used in the PDCCH transmission of the scheduled PDSCH), the UE may also assume that the TCI field exists in the DCI format 1_1 of the PDCCH transmitted on that CORESET.

[0071] If the CORESET for scheduling the PDSCH is not configured with TCI presence information, or if the PDSCH is scheduled via DCI format 1_0, and the time offset between the reception of the DL DCI (the 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 to the CORESET used in the PDCCH transmission that schedules the PDSCH.

[0072] When the TCI presence information is set to "enabled", and the TCI field in the DCI within the component carrier (CC) of the scheduled (PDSCH) indicates the active TCI state within the scheduled CC or DL ​​BWP, and the PDSCH is scheduled via DCI format 1_1, the UE may also use a TCI that follows the value of the TCI field in the detected PDCCH with DCI to determine the QCL of the PDSCH antenna port. If the time offset between the reception of the DL DCI (which schedules the PDSCH) and the PDSCH corresponding to that DCI (which is scheduled via that DCI) is greater than a threshold, the UE may also assume that the RS in the TCI state related to the QCL type parameter provided by the indicated TCI state of the serving cell's PDSCH is the QCL.

[0073] When a UE is configured with a single-slot PDSCH, the indicated TCI state can also be based on the active TCI state within the slot containing the scheduled PDSCH. When a UE is configured with multiple-slot PDSCHs, the indicated TCI state can also be based on the active TCI state within the initial slot containing the scheduled PDSCHs, and the UE can expect the indicated TCI state to be the same across slots containing scheduled PDSCHs. When a UE is configured with a CORESET associated with a cross-carrier scheduling search space set, and the TCI presence information is set to "valid" for that CORESET, and at least one of the TCI states configured for the serving cell scheduled through the search space set contains QCL type D, the UE can also assume that the time offset between the detected PDCCH and the corresponding PDSCH is greater than a threshold.

[0074] In RRC connection mode, in both cases where the TCI information (higher-layer parameter TCI-PresentInDCI) within the DCI is set to "enabled" and cases where the TCI information within the DCI is not set, and provided that the time offset between the reception of the DL DCI (the DCI that schedules the PDSCH) and the corresponding PDSCH (the PDSCH scheduled through this DCI) is less than a threshold, the UE can also assume that the DM-RS port of the serving cell's PDSCH and the RS are QCLs. This RS is associated with the lowest CORESET-ID in the latest (latest) timeslot of one or more CORESETs within the active BWP of the serving cell, and is linked to the monitored search space. This RS can also be referred to as the default TCI state of the PDSCH or the default QCL assumption of the PDSCH.

[0075] The time offset between the reception of a DL DCI and the reception of the corresponding PDSCH can also be called the scheduling offset.

[0076] In addition, the above thresholds can also be referred to as QCL time duration, "timeDurationForQCL", "threshold", "threshold for offset between a DCI indicating a TCIstate and a PDSCH scheduled by the DCI", "threshold-Sched-Offset", scheduling offset threshold, scheduling offset threshold, etc.

[0077] The QCL usage time length can also be based on UE capabilities, such as the delay required for PDCCH decoding and beam switching. The QCL usage time length can also be the minimum time required by the UE for PDCCH reception and the application of spatial QCL information received within the DCI used for PDSCH processing. The QCL usage time length can be expressed in symbols per subcarrier interval or in time (e.g., μs). This QCL usage time length information can be reported from the UE to the base station as UE capability information, or it can be set by the base station to the UE using higher-layer signaling.

[0078] For example, the UE can also be envisioned as follows: the DMRS port of the aforementioned PDSCH and the DL-RS are QCLs, and the DL-RS is based on the TCI state activated for the CORESET corresponding to the aforementioned minimum CORESET-ID. The latest timeslot can also be, for example, the timeslot for receiving the DCI scheduled for the aforementioned PDSCH.

[0079] Alternatively, the CORESET-ID can also be an ID set through the RRC information element "ControlResourceSet" (used to identify the CORESET, controlResourceSetId).

[0080] If no CORESET is set for a CC, the default TCI state can also be the activated TCI state with the lowest ID that can be applied to the PDSCH in the activated DL BWP of that CC.

[0081] After Rel.16, when the PDSCH and the PDCCH scheduled for it are located in different component carriers (CC) (cross-carrier scheduling), if the delay from PDCCH to PDSCH (PDCCH-to-PDSCH delay) is shorter than the QCL usage time, or if there is no TCI state in the DCI used for scheduling, the UE can also obtain the QCL assumption for the scheduled PDSCH from the PDSCH in the active BWP that can be applied to the scheduled cell and has the lowest ID active TCI state.

[0082] <Spatial Relationships for PUCCH>

[0083] The UE can also be configured with parameters used in PUCCH transmission (PUCCH configuration information, PUCCH-Config) via higher-layer signaling (e.g., Radio Resource Control (RRC) signaling). The PUCCH configuration information can also be configured for each partial band (e.g., uplink bandwidth part (BWP)) within a carrier (also known as a cell, component carrier (CC)).

[0084] PUCCH configuration information may also include a list of PUCCH resource set information (e.g., PUCCH-ResourceSet) and a list of PUCCH spatial relationship information (e.g., PUCCH-SpatialRelationInfo).

[0085] PUCCH resource set information can also include a list of PUCCH resource indices (IDs, e.g., PUCCH-ResourceId) (e.g., resourceList).

[0086] Furthermore, if the UE does not have dedicated PUCCH resource configuration information (e.g., dedicated PUCCH resource configuration) provided through PUCCH resource set information in the PUCCH configuration information (before RRC setting), the UE can also determine the PUCCH resource set based on parameters (e.g., pucch-ResourceCommon) within system information (e.g., System Information Block Type 1 (SIB1) or Remaining Minimum System Information (RMSI)). This PUCCH resource set can also contain 16 PUCCH resources.

[0087] On the other hand, if the UE has the above-mentioned dedicated PUCCH resource setting information (UE-dedicated uplink control channel structure, dedicated PUCCH resource structure) (after RRC setting), the UE can also determine the PUCCH resource set according to the number of UCI information bits.

[0088] The UE can also base its decision on the value of a field (e.g., the PUCCH resource indicator field) within the downlink control information (DCI) (e.g., the DCI format 1_0 or 1_1 used in PDSCH scheduling), and the number (N) of CCEs in the control resource set (CORESET) carrying that DCI for PDCCH reception. CCE ), and the index (n) of the beginning (initial) CCE received by the PDCCH. CCE,0 At least one of the above PUCCH resource sets (e.g., cell-specific or UE-specific PUCCH resource sets) is used to determine a PUCCH resource (index) within the aforementioned PUCCH resource set.

[0089] PUCCH spatial relation information (e.g., “PUCCH-spatialRelationInfo” in the RRC information element) can also represent multiple candidate beams (spatial domain filters) used for PUCCH transmission. PUCCH spatial relation information can also represent the spatial association between the RS (Reference signal) and the PUCCH.

[0090] The list of PUCCH spatial relation information may also contain several elements (PUCCH spatial relation information IE (Information Element)). Each PUCCH spatial relation information may also contain, for example, an index (ID, e.g., pucch-SpatialRelationInfoId) of the PUCCH spatial relation information, an index (ID, e.g., servingCellId) of the serving cell, and at least one piece of information related to the RS (reference RS) that forms a spatial relation with the PUCCH.

[0091] For example, the information associated with the RS could be an SSB index, a CSI-RS index (e.g., an NZP-CSI-RS resource structure ID), or an SRS resource ID and a BWP ID. The SSB index, CSI-RS index, and SRS resource ID could also be associated with at least one of the beams, resources, and ports selected by the measurement of the corresponding RS.

[0092] When more than one spatial relation information related to PUCCH is set, the UE can also control it so that a PUCCH spatial relation activation / deactivation MAC CE is activated for a PUCCH resource at a certain time.

[0093] The PUCCH spatial relation activation / deactivation MAC CE of Rel-15 NR can also be represented by three octets (Octet, Oct) 1-3 (8 bits × 3 = 24 bits).

[0094] The MAC CE can also contain information such as the Serving Cell ID (“Serving Cell ID” field), BWP ID (“BWP ID” field), and PUCCH Resource ID (“PUCCH Resource ID” field) of the application object.

[0095] In addition, the MAC CE contains "Si The field (i = 0-7). In a certain S i The field indicates that when 1 is selected, the UE activates the spatial relationship information ID#i. In a given S... i When the field value is 0, the UE deactivates the spatial relationship information ID#i.

[0096] The UE can also activate the PUCCH relationship information specified by the MAC CE 3ms after sending an ACK response to the MAC CE that activates the PUCCH spatial relationship information.

[0097] <Spatial relationships used for SRS and PUSCH>

[0098] The UE can also receive information used in the transmission of measurement reference signals (e.g., sounding reference signals (SRS)) (SRS configuration information, such as parameters in the “SRS-Config” of the RRC control element).

[0099] Specifically, the UE may also receive at least one of the following: information related to one or more SRS resource sets (SRS resource set information, such as “SRS-ResourceSet” of RRC control elements) and information related to one or more SRS resources (SRS resource information, such as “SRS-Resource” of RRC control elements).

[0100] An SRS resource set can also be associated with several SRS resources (or several SRS resources can be grouped). Each SRS resource can also be identified by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).

[0101] SRS resource set information can also include the SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, the SRS resource type, and the usage of the SRS.

[0102] Here, the SRS resource type can also represent any of the following: Periodic SRS (P-SRS), Semi-Persistent SRS (SP-SRS), or Aperiodic SRS (A-SRS, AP-SRS). Additionally, the UE can periodically (or periodically after activation) send P-SRS and SP-SRS, and send A-SRS based on the DCI's SRS request.

[0103] Furthermore, the application ("usage" in the RRC parameter, "SRS-SetUse" in the L1 (Layer-1) parameter) can also be, for example, beam management, codebook-based transmission (codebook: CB), non-codebook-based transmission (non-codebook: NCB), antenna switching, etc. The SRS for codebook-based or non-codebook-based transmission can also be used to determine the precoder for SRI-based codebook-based or non-codebook-based PUSCH transmission.

[0104] For example, in codebook-based transmission, the UE can determine the precoder used for PUSCH transmission based on the SRI, the Transmitted Rank Indicator (TRI), and the Transmitted Precoding Matrix Indicator (TPMI). In non-codebook-based transmission, the UE can also determine the precoder used for PUSCH transmission based on the SRI.

[0105] SRS resource information may also include SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, transmission combo, SRS resource mapping (e.g., time and / or frequency resource location, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.), hop association information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

[0106] Spatial relation information of an SRS (e.g., "spatialRelationInfo" in an RRC information element) can also represent the spatial relation information between a reference signal and an SRS. This reference signal can be at least one of a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, a Channel State Information Reference Signal (CSI-RS), or an SRS (e.g., another SRS). An SS / PBCH block can also be referred to as a Synchronization Signal Block (SSB).

[0107] The spatial relationship information of SRS may also include at least one of the following as an index: SSB index, CSI-RS resource ID, and SRS resource ID, which serves as an index for the aforementioned reference signal.

[0108] Additionally, in this disclosure, the SSB index, SSB resource ID, and SSBRI (SSB Resource Indicator) can be interchanged. Furthermore, the CSI-RS index, CSI-RS resource ID, and CRI (CSI-RS Resource Indicator) can also be interchanged. Furthermore, the SRS index, SRS resource ID, and SRI can also be interchanged.

[0109] The spatial relationship information of SRS can also include the serving cell index, BWP index (BWP ID), etc., corresponding to the above reference signals.

[0110] In NR, uplink signal transmission can also be controlled based on the presence or absence of beam correspondence (BC). BC can be, for example, the ability of a node (e.g., a base station or UE) to determine the beam used for signal transmission (transmit beam, Tx beam) based on the beam used for signal reception (receive beam, Rx beam).

[0111] In addition, BC can also be referred to as transmit / receive beam correspondence (Tx / Rx beam correspondence), beam reciprocity, beam calibration, calibrated / non-calibrated, reciprocity calibrated / non-calibrated, correspondence, and consistency.

[0112] For example, in the absence of a BC, the UE can also use the same beam (spatial domain transmit filter) as the SRS (or SRS resources) indicated from the base station based on the measurement results of more than one SRS (or SRS resources) to transmit uplink signals (e.g., PUSCH, PUCCH, SRS, etc.).

[0113] On the other hand, in the presence of BC, the UE can also use the same or corresponding beam (spatial domain transmit filter) as the beam (spatial domain receive filter) used in the reception of SSB or CSI-RS (or CSI-RS resources) to transmit uplink signals (e.g., PUSCH, PUCCH, SRS, etc.).

[0114] When a UE is configured with spatial relationship information related to an SSB or CSI-RS and the SRS for a specific SRS resource (e.g., in the case of a BC), it can also use the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain receive filter) used for receiving that SSB or CSI-RS to transmit the SRS resource. In this case, the UE can also assume that the UE receive beam for the SSB or CSI-RS is the same as the UE transmit beam for the SRS.

[0115] When a UE is configured with spatial relationship information with other SRSs (reference SRSs) and related to that SRS (target SRS) for a specific SRS (target SRS) resource (e.g., without a BC), it can also use the same spatial domain filter (spatial domain transmission filter) as the one used for transmitting the reference SRS to transmit the target SRS resource. In other words, in this case, the UE can also assume that the UE transmission beam for the reference SRS is the same as the UE transmission beam for the target SRS.

[0116] The UE can also determine the spatial relationship of PUSCHs scheduled through the DCI based on the value of a field (e.g., the SRS Resource Identifier (SRI) field) within the DCI (e.g., DCI format 0_1). Specifically, the UE can also use the spatial relationship information of the SRS resources determined based on the value of this field (e.g., SRI) (e.g., the "spatialRelationInfo" of the RRC information element) for PUSCH transmission.

[0117] When using codebook-based transmission for PUSCH, the UE can also have two SRS resources configured via RRC and one of the two SRS resources indicated via DCI (a 1-bit field). When using non-codebook-based transmission for PUSCH, the UE can also have four SRS resources configured via RRC and one of the four SRS resources indicated via DCI (a 2-bit field). To use spatial relationships other than the two or four spatial relationships configured via RRC, an RRC reset is required.

[0118] Additionally, DL-RS can be configured for the spatial relationships of SRS resources used in PUSCH. For example, for SP-SRS, the UE can configure the spatial relationships of multiple (e.g., up to 16) SRS resources via RRC and indicate one of the multiple SRS resources via MAC CE.

[0119] (Path Loss RS)

[0120] Path loss PL under transmit power control for PUSCH, PUCCH, and SRS respectively b，f，c (q d [dB] is the index q of the reference signal (RS, Path Loss Reference RS) used by the UE to associate with the active ULBWP b of the carrier f of the serving cell c. d And is calculated. In this disclosure, path loss reference RS, path loss (pathloss(PL))-RS, index q d The RS used for path loss calculation and the RS resources used for path loss calculation can also be substituted for each other. In this disclosure, calculation, estimation, measurement, and tracking can also be substituted for each other.

[0121] Investigating whether to update the existing mechanism for the higher layer filtered RSRP (RSRP for path loss measurement) when the path loss RS is updated via MAC CE.

[0122] When the path loss RS is updated via MAC CE, path loss measurement based on L1-RSRP can also be applied. The higher-layer filter RSRP can also be used for path loss measurement at a timing available after the MAC CE for updating the path loss RS, prior to which L1-RSRP was used for path loss measurement. Similarly, the higher-layer filter RSRP can also be used for path loss measurement at a timing available after the MAC CE for updating the path loss RS, prior to which the higher-layer filter RSRP of the previous path loss RS was used. Similar to the operation in Rel.15, the higher-layer filter RSRP can also be used for path loss measurement, and the UE can also track all path loss RS candidates set via RRC. The maximum number of path loss RS that can be set via RRC can also depend on the UE's capabilities. When the maximum number of path loss RS that can be set via RRC is X, path loss RS candidates below X can also be set via RRC, and the path loss RS is selected via MAC CE from the set path loss RS candidates. The maximum number of path loss RS that can be set via RRC can be 4, 8, 16, 64, etc.

[0123] In this disclosure, the higher layer filter RSRP, the filtered RSRP, and the layer 3 filter RSRP (layer 3 filtered RSRP) can also be used interchangeably.

[0124] (Measurement delay requirements)

[0125] The requirements for measurement delay in intra-frequency measurements are specified for radio resource management (RRM) measurements used for Layer 3 (L3) mobility. For example... Figure 1 As shown, measurement delay requirements are specified for cell detection, RSRP measurement, and SSB index detection.

[0126] Here, about M pss / sss_sync_w / o_gaps The value is 40 for UEs supporting FR2 power level 1, 24 for UEs supporting power level 2, 24 for UEs supporting FR2 power level 3, and 24 for UEs supporting FR2 power level 4. Regarding M... meas_period_w / o_gaps, 40 for UEs supporting power level 1, 24 for UEs supporting FR2 power level 2, 24 for UEs supporting power level 3, and 24 for UEs supporting power level 4. When 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 the MG completely overlap, K p = 1. When the intra-frequency SMTC and the MG partially overlap, the measurement gap repetition period (measurement gap repetition period (MGRP)) is used, and K p = 1 / (1 - (SMTC period / MGRP)), where the SMTC period < MGRP. According to the relationship between all the reference signals set for L1-RSRP outside the MG for radio link monitoring (RLM), beam failure detection (BFD), candidate beam detection (CBD), or beam reporting, and the intra-frequency SMTC occasion, K RLM (K layer1_measurement ) is 1 or 1.5. CSSF intra is the carrier-specific scaling factor.

[0127] When DRX exists and the DRX period is 320 ms or less, considering the misalignment between the DRX on duration (duration) and the SMTC window, it is set to 1.5 times inside the ceil function.

[0128] In LTE, measurements can always be performed through CRS, so the measurement delay requirement is a fixed value of 600 ms for cell detection and synchronization + 200 ms for RSRP measurement = 800 ms. In NR, from the perspective of UE power consumption recommendation, in order to avoid unnecessary high-frequency measurements, the 600 ms for LTE cell detection and the 200 ms for LTE RSRP measurement are specified as the lower limit values. In NR, since the SMTC period can be set, the measurement delay requirement corresponding to the SMTC period is applied.

[0129] (L1-RSRP measurement / reporting)

[0130] For each RS (transmit beam of each base station) set by RRC, the UE measures the value of layer 1 (L1)-RSRP.

[0131] For each L1-RSRP report, a measurement period is specified indicating that the L1-RSRP measurement needs to be completed within the first few samples. If the number of samples used in the RSRP measurement for an L1-RSRP report is set to M, the scaling factor considering overlap with SMTC or measurement gap (MG) is set to P, the scaling factor considering UE receive beam switching is set to N, and the transmission period of SSB or CSI-RS is set to the RS transmission period, then 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.

[0132] Here, as Figure 2A As shown, when a time restriction for channel (signal) measurements is set, or when the RS used for L1-RSRP measurements 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; and when the L1-RSRP report is based on CSI-RS with repeated occurrences and the number of CSI-RS resources is less than the maximum number of received beams (maxNumberRxBeam), N=ceil(maxNumberRxBeam / number of CSI-RS resources).

[0133] The measurement accuracy of L1-RSRP based on a single sample measurement is specified. Whether or not RSRP averaging is used in L1 can also depend on the UE implementation. When time-domain measurement constraints for channel measurements are set, the UE reports the RSRP of a single sample as the L1-RSRP measurement result without averaging.

[0134] Figure 3A The L1-RSRP measurement period T based on SSB using FR1 is shown. L1-RSRP_Measurement_Period_SSB . Figure 3B The L1-RSRP measurement period T based on SSB for FR2 is shown. L1-RSRP_Measurement_Period_SSB Here, T SSB =ssb-periodicityServingCell is the period of the SSB index set for L1-RSRP measurements. T DRX This is the DRX cycle length. TReport It is the cycle that is set for reporting.

[0135] Figure 4A The L1-RSRP measurement period T based on CSI-RS for FR1 is shown. L1-RSRP_Measurement_Period_CSI-RS . Figure 4B The L1-RSRP measurement period T is shown using CSI-RS based on FR2. L1-RSRP_Measurement_Period_CSI-RS T CSI-RS This is the CSI-RS period set for L1-RSRP measurements. This requirement can be applied to cases where CSI-RS set for L1-RSRP measurements is transmitted with Density=3.

[0136] (Default spatial relationships and default PL-RS)

[0137] In Rel.15, each MAC CE is required for the activation / deactivation of the PUSCH spatial relation and the activation / deactivation of the SRS spatial relation. The PUSCH spatial relation follows the SRS spatial relation.

[0138] In Rel.16, at least one of the MAC CEs for activation / deactivation of PUCCH spatial relations and SRS spatial relations may be omitted.

[0139] In FR2, if the spatial relationships and PL-RS for PUCCH are not configured, the default spatial relationships and PL-RS are applied to PUCCH (default spatial relationships and default PL-RS). Similarly, in FR2, if the spatial relationships and PL-RS for SRS are not configured, the default spatial relationships and PL-RS are applied to PUSCH and SRS scheduled via DCI format 0_1 ​​(default spatial relationships and default PL-RS).

[0140] When a CORESET is set in an active DL BWP on CC, the default spatial relationship and default PL-RS can also be the TCI state or QCL assumption of the CORESET with the lowest CORESET ID within that active DL BWP. When no CORESET is set in an active DL BWP on CC, the default spatial relationship and default PL-RS can also be the active TCI state of the PDSCH with the lowest ID within that active DL BWP.

[0141] In Rel.15, the spatial relationships of PUSCHs scheduled via DCI format 0_0 follow the spatial relationships of the PUCCH resources with the lowest PUCCH resource ID in the active spatial relationships of PUCCHs on the same CC. Even if no PUCCH is sent on a SCell, the network needs to update the PUCCH spatial relationships on all SCells.

[0142] In Rel.16, the PUCCH settings for PUSCHs scheduled via DCI format 0_0 are not required. For PUSCHs scheduled via DCI format 0_0, the default space relation and default PL-RS are applied.

[0143] For accurate path loss measurement used in transmit power control, the Rel.15 UE is configured with up to four PL-RS via RRC signaling. For example... Figure 5 As shown, even if the UL transmit beam (spatial relationship) is updated via MAC CE, the PL-RS cannot be updated via MAC CE.

[0144] like Figure 6 As shown, a Rel.16 UE can be configured with up to 64 PL-RS via RRC signaling and instructed (activated) one PL-RS via MAC CE. The UE needs to track (track) up to 4 active PL-RS for all UL channels (SRS, PUCCH, and PUSCH). Tracking PL-RS can also involve calculating and storing path loss measurements based on the PL-RS.

[0145] For path loss calculation, the RSRP (average of multiple RSRP measurements) is used with a higher-layer filter. For example... Figure 6 As shown, when the PL-RS is updated via MAC CE (in the case where PL-RS#1, which is different from the PL-RS used for path loss calculation (the previous PL-RS) in the PL-RS list set via RRC, is indicated via MAC CE), the initial RSRP measurement instance 3ms after the transmission of the ACK for that MAC CE 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 to the slot boundaries after the fifth RSRP measurement sample.

[0146] In this disclosure, RSRP measurement, RSRP measurement sample, RSRP measurement resource, RSRP measurement timing, RSRP measurement example, PL-RS measurement sample, PL-RS measurement resource, PL-RS measurement, PL-RS measurement timing, and PL-RS measurement example can be used interchangeably.

[0147] When the TCI state used for PDCCH or PDSCH is updated via MAC CE, the PL-RS is also updated to that TCI state. It is unclear how the updated PL-RS will be applied if the UE applies the default spatial relationship and the default PL-RS. Because measurements for the RSRP of the higher-layer filters take time, the updated PL-RS cannot be applied immediately after the TCI state is updated.

[0148] (DL receiver beam management)

[0149] A UE can also have more than one TCI state set on the serving cell. The UE completes the switching of the active TCI state within the delay time. Regarding when the active TCI state is updated via MAC CE, when the updated TCI state (target TCI state) is applied (and the length of the delay time) depends on whether the target TCI state is known (known, measured). If the target TCI is unknown (unknown, not measured), the UE can also apply the target TCI state after the target TCI becomes known.

[0150] The target TCI state is known if the following conditions for a TCI state are met:

[0151] • During the period from the last transmission of the RS resource used in the L1-RSRP measurement report for the target TCI state to the completion of the activation of the TCI state switching (TCI switching period), the RS resource used for L1-RSRP measurement is an RS within the target TCI state or an RS that is in QCL with the target TCI state.

[0152] • During TCI switching, the TCI status switching command is received within 1280ms from the last transmission of the RS resource used for beam reporting or measurement.

[0153] • During TCI handover, prior to the TCI state handover command, the UE sends at least one L1-RSRP report for the target TCI state.

[0154] • During TCI switching, the target TCI state is in a detectable state.

[0155] • During TCI switching, the SSB associated with the target TCI state is in a detectable state.

[0156] • During TCI switching, the signal-to-noise ratio (SNR) of the target TCI state is above -3dB.

[0157] If the conditions for multiple TCI states are not met, the target TCI state is unknown.

[0158] Given that the target TCI state is known, the UE can receive data in time slot n+T based on the PDSCH carrying the MAC CE activation command in time slot n. HARQ +(3ms+TO k *(T first-SSB +T SSB-proc The PDCCH of the serving cell with the target TCI state that occurred before the NR time slot length. Until time slot n+T HARQ +(3ms+TO k *(T first-SSB Up to the length of the NR slot, the UE can receive PDCCH with the old (pre-update) TCI state.

[0159] Here, T HARQ T is the time between sending DL data and receiving a positive response (acknowledgement). first-SSB This is the time from when the MAC CE command is decoded by the UE to when the initial SSC is sent. T SSB-proc It takes 2ms. Regarding TO k The value is 1 if the target TCI state does not exist in the list of active TCI states used by PDSCH, and 0 if it does not.

[0160] When the target TCI state is unknown, based on the reception of the PDSCH carrying the MAC CE activation command in time slot n, the UE can receive data in time slot n+T. HARQ +(3ms+T L1-RSRP +TO uk *(T first-SSB +T SSB-proc The PDCCH of the serving cell with the target TCI state that occurred before the NR time slot length. Until time slot n+T HARQ +(3ms+T L1-RSRP +TO uk *(T first-SSB Up to the length of the NR slot, the UE can receive PDCCH with the old (pre-update) TCI state.

[0161] Here, T L1-RSRPThis is the time used for L1-RSRP measurements to improve the received beam. T for SSB L1-RSRP Let M = 1 and T be the values ​​of M and T, respectively. Report T when = 0 L1-RSRP_Measurement_Period_SSB T for CSI-RS L1-RSRP This is for periodic CSI-RS and aperiodic CSI-RS where the number of resources in the resource set is at least equal to MaxNumberRxBeam, and is set to M=1, T Report T when = 0 L1-RSRP_Measurement_Period_CSI-RS Regarding TO uk The L1-RSRP measurement is 1 for CSI-RS based measurements, and 0 for SSB-based measurements when TCI state transitions include QCL type D. Furthermore, when TCI state transitions include other QCL types, TO... uk The value is 1. When the TCI state transition only involves QCL type A, QCL type B, or QCL type C, for the SSB in FR2, T L1-RSRP_Measurement_Period_SSB =0, T in FR2 L1-RSRP_Measurement_Period_CSI-RS =0. When the TCI state transition includes QCL type D, T first-SSB This is the time up to the initial SSB measurement following the L1-RSRP measurement. For other ALC types, T first-SSB This is the time until the initial SSC is sent after the MAC CE command is decoded by the UE. For the target TCI state, the SSB is either QCL type A or QCL type C.

[0162] The timing for switching to the target TCI state when the target TCI state is unknown can also be the timing for switching to the target TCI state when the target TCI state is known, with T added. L1-RSRP And thus the timing.

[0163] When the TCI state used for PDCCH or PDSCH is updated via MAC CE, the UE applying the default spatial relationship preferably makes the default spatial relationship consistent with the updated TCI state. However, the timeline for switching the default spatial relationship is unclear. Furthermore, when the TCI state updated via MAC CE is unknown, how to switch the default spatial relationship is unclear.

[0164] Therefore, the inventors of this invention conceived of a method for appropriately switching the default spatial relationship based on the update of the TCI state based on MAC CE.

[0165] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods involved in each embodiment can be applied individually or in combination.

[0166] In this disclosure, "A / B" and "at least one of A and B" can be used interchangeably. In this disclosure, cell, CC, carrier, BWP, and band can also be used interchangeably. In this disclosure, index, ID, indicator, and resource ID can also be used interchangeably. In this disclosure, RRC parameters, higher-layer parameters, RRC information elements (IEs), and RRC messages can also be used interchangeably.

[0167] In this disclosure, the TCI state, QCL concept, QCL parameters, spatial domain receive filter, UE spatial domain receive filter, UE receive beam, DL receive beam, DL precoder, DL precoder, DL-RS, RS of QCL type D in TCI state or QCL concept, and RS of QCL type A in TCI state or QCL concept can also be substituted for each other. In this disclosure, the RS of QCL type D, the DL-RS associated with QCL type D, the DL-RS having QCL type D, the source of the DL-RS, SSB, and CSI-RS can also be substituted for each other.

[0168] In this disclosure, spatial relation, spatial relation information, spatial relation concept, QCL parameters, spatial domain transmission filter, UE spatial domain transmission filter, UE transmission beam, UL transmission beam, UL precoding, UL precoder, RS of spatial relation, DL-RS, QCL concept, SRI, SRI-based spatial relation, and UL TCI can also be used interchangeably.

[0169] In this disclosure, TRS, CSI-RS for tracking, CSI-RS with TRS information (high-level parameter trs-Info), and NZP-CSI-RS resources within the NZP-CSI-RS resource set with TRS information can also be interchanged.

[0170] In this disclosure, DCI format 0_0, DCI without SRI, DCI without spatial relation indication, and DCI without CIF can be interchanged with each other. In this disclosure, DCI format 0_1, DCI with SRI, DCI with spatial relation indication, and DCI with CIF can also be interchanged with each other.

[0171] In this disclosure, a dedicated PUCCH and a PUCCH based on a dedicated PUCCH configuration (PUCCH-Config) can be used interchangeably. Similarly, a dedicated SRS and an SRS based on a dedicated SRS configuration (SRS-Config) can also be used interchangeably.

[0172] (Wireless communication method)

[0173] In this disclosure, specific UL signals and specific types of UL signals can be interchanged. A specific UL signal can also be at least one of PUCCH (dedicated PUCCH), SRS (dedicated SRS), PUSCH scheduled via DCI format 0_1, and PUSCH scheduled via DCI format 0_0.

[0174] In this disclosure, a specific DL signal, a specific type of DL signal, a specific DL channel, and a specific type of DL channel can be interchanged. A specific DL signal can also be at least one of PDCCH, PDSCH, and CORESET.

[0175] In this disclosure, the TCI state updated via MAC CE, the TCI state activated via MAC CE, the TCI state indicated via MAC CE, the target TCI state, the TCI state of the PL-RS activated via MAC CE, and the TCI state referenced via the default spatial relationship of a specific UL signal and at least one of the default PL-RS can be interchanged. In this disclosure, 3ms can also be replaced by a specific time. The specific time may not be 3ms. The specific time can be specified in the specification, set via RRC parameters, or a value reported via UE capability information. In this disclosure, the measurement sample number N can be specified in the specification, set via RRC parameters, or a value reported via UE capability information. N can be 5 or not 5.

[0176] If a specific UL signal meets the application conditions and the TCI state of a specific DL signal is updated via MAC CE, then a specific timeline can be followed to switch at least one of the default spatial relationships and default PL-RS of the specific UL signal to the target TCI state.

[0177] The application requires at least one of the following conditions: the frequency of the specific UL signal is within a specific frequency range (FR); the specific high-level parameter corresponding to the specific UL signal is set; the specific UL signal condition corresponding to the specific UL signal is met; and the target TCI state is known.

[0178] The specific frequency range can be either FR2 or outside of FR1.

[0179] Specific higher-layer parameters can also correspond to specific UL signals. When a specific UL signal is a PUSCH scheduled via DCI format 0_0, the corresponding specific higher-layer parameter can also be the default beam path loss activation information (enableDefaultBeamPlForPUSCH0_0). When a specific UL signal is a dedicated PUSCH, the corresponding specific higher-layer parameter can also be the default beam path loss activation information (enableDefaultBeamPlForPUCCH). When a specific UL signal is at least one of a dedicated SRS and a PUSCH scheduled via DCI format 0_1, the corresponding specific higher-layer parameter can also be the default beam path loss activation information (enableDefaultBeamPlForSRS).

[0180] A combination of a specific UL signal and specific UL signal conditions for that specific UL signal may also be at least one of the following specific UL signals 1 to 4.

[0181] [Specific UL Signal 1]

[0182] A specific UL signal is a dedicated PUCCH. Specific UL signal conditions are specific to that UL signal and do not involve predefined spatial relationships or PL-RS.

[0183] [Specific UL Signal 2]

[0184] A specific UL signal is a dedicated SRS. Specific UL signal conditions are specific to a particular UL signal and do not involve setting spatial relationships or PL-RS.

[0185] [Specific UL Signal 3]

[0186] A specific UL signal is a PUSCH scheduled via DCI format 0_0. The specific UL signal condition is that for a specific UL signal, there is no PUSCH resource setting on the active UL BWP, or there is no active space relationship on the PUSCH resource of the active UL BWP.

[0187] [Specific UL Signal 4]

[0188] A specific UL signal is a PUSCH scheduled via DCI format 0_1. The specific UL signal condition is that for a specific UL signal, the corresponding SRS resource (the SRS resource indicated by SRI) does not include spatial relationships and PL-RS.

[0189] If the CORESET is set in the active DL BWP on the CC of a specific UL signal, the specific DL signal can also be a PDCCH. If the CORESET is not set in the active DL BWP on the CC of a specific UL signal, the specific DL signal can also be a PDSCH.

[0190] <Implementation Method 1>

[0191] When the application conditions are met and the TCI state of a specific DL signal is updated via MAC CE, a specific timeline can be followed to switch at least one of the default spatial relationships and default PL-RS used for a specific UL signal. The specific timeline can also follow either timeline 1 or 2 below.

[0192] [Timeline 1]

[0193] The timeline for switching the default spatial relationship can also be the same as the timeline for switching the default PL-RS. In other words, the timing for switching from the previous spatial relationship to the target TCI state can also be the same as the timing for switching from the previous PL-RS to the target TCI state.

[0194] The UE can also calculate the handover time of the default PL-RS and the handover time of the default spatial relationship, and set the longer of the two calculated handover times as the handover time for both the default PL-RS and the default spatial relationship. The handover time can be the time from the reception of the MAC CE updating the TCI state to the handover of at least one of the default spatial relationship and the default PL-RS, or the time from the transmission of the ACK for the MAC CE to the handover of at least one of the default spatial relationship and the default PL-RS, or the time from 3ms after the transmission of the ACK for the MAC CE to the handover of at least one of the default spatial relationship and the default PL-RS.

[0195] According to timeline 1, the default spatial relationship and the default PL-RS can always be kept the same, and the UE can calculate the transmission power appropriately.

[0196] [Timeline 2]

[0197] The timeline for switching the default spatial relationship can also differ from the timeline for switching the default PL-RS. The switching time for the default spatial relationship can also be shorter than the switching time for the default PL-RS. For example, the UE can switch the default spatial relationship to the target TCI state 3ms after sending the ACK for the MAC CE updating the TCI state, and then switch the default PL-RS to the target TCI state.

[0198] According to timeline 2, the switching time of the default spatial relationship (UL transmit beam) can be shortened.

[0199] <Implementation Method 2>

[0200] When the application conditions are met and the TCI state of a specific DL signal is updated via MAC CE, a specific timeline can also be followed to switch at least one of the default spatial relationships and default PL-RS to that TCI state.

[0201] When the TCI state (target TCI state) indicated by the MAC CE (activation command) is known, the UE can also switch the TCI state used for receiving a specific DL signal to the target TCI state 3 ms after the ACK for the PDSCH carrying the MAC CE is sent (DL handover timing). On a specific timeline, the UE can also switch at least one of the default spatial relationships and default PL-RS of a specific UL signal to the target TCI state 3 ms + offset after the ACK is sent (UL handover timing). In this disclosure, the offset and time offset can also be interchanged.

[0202] For example, such as Figure 7 As shown, when the MAC CE activates TCI state #1 and TCI state #1 is known, the UE can also switch the TCI state for a specific DL signal to TCI state #1 at a timed interval 3ms after the ACK is sent for the MAC CE. After an offset time elapsed from this timed interval, at least one of the default spatial relationship of the specific UL signal and the default PL-RS can be switched to TCI state #1.

[0203] According to implementation method 2, even if the TCI state is updated via MAC CE, the UE can appropriately switch at least one of the default spatial relationship and the default PL-RS.

[0204] <Implementation Method 3>

[0205] In Implementation Method 2, the offset can be set via RRC parameters, specified in the specification, or reported via UE capability information. The offset can also be any one of the following offsets 1 to 5.

[0206] [Offset 1]

[0207] 0 (zero). The switching timing for the default spatial relationship and at least one of the default PL-RS can also be 3ms after the ACK transmission of the MAC CE (or the switching timing for the TCI state when the target TCI state is known). The UL switching timing can also be the same as the DL switching timing.

[0208] [Offset 2]

[0209] x[ms] or x[timeslot]. x can be specified by the specification or set by the RRC parameter. x can also depend on the subcarrier spacing (SCS) or the timeslot length.

[0210] [Offset 3]

[0211] Offsets used for switching spatial relationships based on MAC CE. Offsets can be specified in the specification or set via RRC parameters. For example, when the target TCI state is known, the offset can also be TO. k *(T first-SSB +T SSB-proc When the target TCI state is unknown, the offset can also be T. L1-RSRP +TO uk *(T first-SSB +T SSB-proc ).

[0212] [Offset 4]

[0213] The time required for TCI state switching when the target TCI state is unknown. For example, the offset could be based on the time T used for L1-RSRP measurement. L1-RSRP The time can also be T. L1-RSRP +TO uk *(T first-SSB +T SSB-proc For example, the offset can be based on the time T used for L1-SINR measurement. L1-SINR The time can also be T. L1-SINR +TO uk *(T first-SSB +T SSB-proc ).

[0214] [Offset 5]

[0215] The time it takes for the target TCI state to change from unknown to known. For example, the offset could be the time T based on L1-RSRP measurements. L1-RSRP The time can also be T. L1-RSRP For example, the offset can be based on the time T used for L1-SINR measurement. L1-SINR The time can also be T. L1-SINR .

[0216] According to implementation method 3, the UE can switch at least one of the default spatial relationship and the default PL-RS at appropriate timing.

[0217] <Implementation Method 4>

[0218] The offset in Implementation 3 can also depend on the type of parameter (reference parameter) referenced by at least one of the default spatial relationships and default PL-RS. In this disclosure, reference parameters, TCI states or QCL assumptions, reference parameters before updates, reference parameters after updates, and target TCI states can also be interchanged.

[0219] The offset may also depend on at least one of the following types 1 and 2 of the reference parameter.

[0220] [Category 1]

[0221] The offset depends on whether the reference parameter is the TCI state used by PDCCH (CORESET) or PDSCH. The offset when the reference parameter is the TCI state used by PDCCH can also be different from the offset when the reference parameter is the TCI state used by PDSCH.

[0222] The offset can also depend on whether a CORESET is set in the active DL BWP on the CC. The offset when a CORESET is set in the active DL BWP on the CC can differ from the offset when a CORESET is not set. When a CORESET is set in the active DL BWP on the CC, the reference parameter is the TCI state used by the PDCCH. When a CORESET is not set in the active DL BWP on the CC, the reference parameter is the TCI state used by the PDSCH.

[0223] [Type 2]

[0224] When the reference parameter is the TCI state used for PDCCH (CORESET) (where CORESET is set in the active DL BWP on CC), the offset depends on whether the reference parameter is in TCI state or QCL assumption. The offset when the reference parameter is in TCI state used for PDCCH can also be different from the offset when the reference parameter is in TCI state used for PDSCH. When the TCI state is set for CORESET, the UE uses that TCI state for PDCCH reception. When the TCI state is not set for CORESET, the UE assumes that the SSB corresponding to the random access channel (RACH) transmission occasion (the SSB identified by the UE during initial access) and the DM-RS antenna port associated with PDCCH reception are in QCL, and uses that QCL assumption for PDCCH reception.

[0225] According to implementation 4, the UE can use an appropriate offset based on an RS that is referenced by at least one of the default spatial relationships and the default PL-RS.

[0226] <Implementation Method 5>

[0227] Depending on whether the target TCI state is known or unknown, the offset in Implementation 3 can also have either of the following relationships 1 and 2.

[0228] [Relationship 1]

[0229] The offset depends on whether the target TCI state is known or unknown. Different offsets can also be used between cases where the target TCI state is known and cases where the target TCI state is unknown.

[0230] When the target TCI state is known, the shorter of the two offsets (e.g., 0) can be used. When the target TCI state is unknown, the longer of the two offsets (e.g., greater than 0) can be used. The longer offset can be either offset 4 or offset 5 in Implementation 3.

[0231] [Relationship 2]

[0232] The offset is independent of whether the target TCI state is known or unknown. The same offset can be used between cases where the target TCI state is known and cases where the target TCI state is unknown. The UE can also determine the receive beam / transmit beam (and determine / measure the RS of QCL type D) based on the unknown TCI state.

[0233] According to implementation 5, the UE can use an appropriate offset regardless of whether the RS referenced by the default spatial relationship and at least one of the default PL-RS is known or unknown.

[0234] <Implementation Method 6>

[0235] The UE may also perform either of the following operations 1 or 2 during the period corresponding to the offset in Implementation Method 2. The period corresponding to the offset may also start 3ms after the ACK transmission for the MAC CE and have the length of the offset.

[0236] [Operation 1]

[0237] The UE applies / envisions the spatial relationships before the update and sends specific UL signals.

[0238] [Operation 2]

[0239] The UE applies / envisions the updated spatial relationships and sends specific UL signals. During the period corresponding to the offset, performance requirements can also be mitigated. For example, performance requirements can be specified by at least one of the required SNR or required error rate.

[0240] According to implementation method 6, the UE can operate appropriately during the switching of TCI state.

[0241] <Implementation Method 7>

[0242] When a MACCE activates / updates a target TCI state for a TCI state referenced by at least one of the default spatial relationship and the default PL-RS, and the target TCI state is known, the UE may also start counting L1-RSRP measurement samples 3ms after the ACK is sent 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.

[0243] In this disclosure, N can be specified in the specification, set via RRC parameters, or reported via UE capability information. For example, N can also be 5.

[0244] For example, such as Figure 8 As shown, if TCI state #1 is activated for a MAC CE that is referenced by the default PL-RS and TCI state #1 is known, the UE can also use TCI state #1 for PL-RS in the next time slot after the 5th L1-RSRP measurement starting 3ms after the ACK sent for that MAC CE.

[0245] When the MACCE activates / updates the target TCI state for a TCI state referenced by at least one of the default spatial relationship and the default PL-RS, and the target TCI state is unknown, the UE may also count the L1-RSRP measurement samples from the time when the target TCI state becomes known (satisfying the known conditions of TCI), and in the next time slot of the Nth sample, switch at least one of the default spatial relationship and the default PL-RS to the target TCI state.

[0246] For example, such as Figure 9 As shown, when the MAC CE activates TCI state #1 for the TCI state referenced by the default PL-RS, and TCI state #1 is unknown, the UE can also use TCI state #1 for PL-RS in the next time slot after the 5th L1-RSRP measurement from the time when TCI state #1 becomes known.

[0247] When the MACCE activates / updates the target TCI state for a TCI state referenced by at least one of the default spatial relationships and the default PL-RS, and the target TCI state is unknown, since the UE does not measure the received beam, it is preferable to switch to the target TCI state after waiting for the time required for such measurement.

[0248] As an additional constraint for cases where the target TCI state (the activated / updated TCI state) is known, even when the target TCI state is unknown, T can be assumed before N measurement samples. L1-RSRP Additional application time. As an additional constraint for the case where the target TCI state is known, even when the target TCI state is unknown, T can be assumed after N measurement samples. L1-RSRP Additional application time.

[0249] In FR2, when both spatial relation / PL-RS are set, and the TCI state used for the default spatial relation / default PL-RS is activated / updated via MAC CE, the application timing for the path loss measurement of the default PL-RS for the PUCCH / SRS / PUSCH after that MAC CE, based on the filtered RSRP of the higher layers, is defined. The filtered RSRP value for the previous PL-RS is used before the application timing. If the TCI state of the default PL-RS is known, the application timing is the next time slot after the 5th measurement sample. Here, the 1st measurement sample corresponds to the first instance 3ms after the transmission of the ACL for that MAC CE. If the TCI state of the default PL-RS is unknown, it can also be assumed before the 5th measurement sample. L1-RSRP Additional application time.

[0250] When a MACCE activates / updates the target TCI state for a TCI state referenced by at least one of the default spatial relationships and default PL-RS, and the target TCI state is unknown, the UE can also receive a TCI state 3ms after the ACK sent for that MAC CE. L1-RSRP After (ACK sent 3ms+T) L1-RSRP Starting from the Nth sample, the L1-RSRP measurement samples are counted, and in the next time slot after the Nth sample, at least one of the default spatial relationship and the default PL-RS is switched to the target TCI state. This can replace T. L1-RSRP The time T used for L1-SINR measurement L1-SINR Alternatively, any one of the offsets 1 to 5 from Implementation Method 3 can be used.

[0251] For example, such as Figure 10As shown, when a MAC CE activates TCI state #1 for a TCI state referenced via the default PL-RS, and TCI state #1 is unknown, the UE can also send an ACK from the MAC CE within 3ms+T. L1-RSRP The next time slot following the fifth L1-RSRP measurement will use TCI state #1 for PL-RS.

[0252] When a MACCE activates / updates the target TCI state for a TCI state referenced by at least one of the default spatial relationships and default PL-RS, and the target TCI state is unknown, the UE can also start counting L1-RSRP measurement samples 3ms after the ACK transmission for that MAC CE, and start counting from the measurement of the Nth sample. L1-RSRP In the next time slot, the default spatial relationship and at least one of the default PL-RS will be switched to the target TCI state. This can replace T... L1-RSRP The time T used for L1-SINR measurement L1-SINR Alternatively, any one of the offsets 1 to 5 from Implementation Method 3 can be used.

[0253] According to implementation method 7, the UE can switch the default PL-RS at appropriate timing.

[0254] <Implementation Method 8>

[0255] like Figure 6 In that case, when the PL-RS list is set via RRC parameters and a different PL-RS (target PL-RS) than the PL-RS used for path loss calculation (previous PL-RS) is activated via MAC CE, the UE can also use the same timeline as in Implementation 7 to switch PL-RS.

[0256] If a PL-RS different from the previous PL-RS is activated via MAC CE, and the TCI state of the activated PL-RS is known, the UE can also start counting L1-RSRP measurement samples 3ms after the ACK is sent for the MAC CE, and switch the previous PL-RS to the activated PL-RS in the next time slot of the Nth sample.

[0257] For example, such as Figure 11 As shown, if the MAC CE activates a different PL-RS#1 than the previous PL-RS, and the TCI state of PL-RS#1 is known, the UE can also switch from the previous PL-RS to PL-RS#1 in the next time slot after the 5th L1-RSRP measurement starting 3ms after the ACK sent for the MAC CE.

[0258] If a target PL-RS that is different from the previous PL-RS is activated / updated via MAC CE, and the TCI state of the target PL-RS is unknown, the UE can also start counting L1-RSRP measurement samples from the time when the TCI state of the target PL-RS becomes known (satisfying the known conditions of TCI), and switch the previous PL-RS to the target PL-RS in the next time slot of the Nth sample.

[0259] For example, such as Figure 12 As shown, if the MAC CE activates a PL-RS#1 that is different from the previous PL-RS, and the TCI state of PL-RS#1 is unknown, the UE can also switch from the previous PL-RS to PL-RS#1 in the next time slot after the 5th L1-RSRP measurement from the time when the TCI state of PL-RS#1 becomes known.

[0260] When a target PL-RS different from the previous PL-RS is activated / updated via MAC CE, and the TCI status of the target PL-RS is unknown, since the UE does not measure the received beam, it is preferable to switch the PL-RS after waiting for the time required for such measurement.

[0261] As an additional constraint for the case where the TCI state of the target PL-RS (the activated / updated PL-RS) is known, even when the TCI state of the target PL-RS is unknown, T can still be assumed before N measurement samples. L1-RSRP Additional application time. As an additional constraint for the case where the TCI state of the target PL-RS is known, even when the TCI state of the target PL-RS is unknown, T can be assumed after N measurement samples. L1-RSRP Additional application time.

[0262] If a target PL-RS, different from the previous PL-RS, is activated / updated via MAC CE, and the TCI state of the target PL-RS is unknown, the UE can also receive a T 3ms later from the ACK sent for that MAC CE. L1-RSRP After (ACK sent 3ms+T) L1-RSRP Starting from the Nth time slot, the L1-RSRP measurement samples are counted, and in the next time slot after the Nth sample, the previous PL-RS is switched to the target PL-RS. This can replace T. L1-RSRP The time T used for L1-SINR measurement L1-SINR Alternatively, any one of the offsets 1 to 5 from Implementation Method 3 can be used.

[0263] For example, such as Figure 13As shown, when PL-RS#1 is activated for a MAC CE with a TCI state referenced by the default PL-RS, and the TCI state of PL-RS#1 is unknown, the UE can also send an ACK from the MAC CE within 3ms+T. L1-RSRP The next time slot after the fifth L1-RSRP measurement switches from the previous PL-RS to PL-RS#1.

[0264] If a target PL-RS, different from the previous PL-RS, is activated / updated via MAC CE, and the TCI state of the target PL-RS is unknown, the UE can also start counting L1-RSRP measurement samples 3ms after the ACK transmission for that MAC CE, and start counting from the measurement of the Nth sample. L1-RSRP In the next time slot, the previous PL-RS will be switched to the target PL-RS. This can replace T. L1-RSRP The time T used for L1-SINR measurement L1-SINR Alternatively, any one of the offsets 1 to 5 from Implementation Method 3 can be used.

[0265] According to implementation method 8, the UE can switch PL-RS at appropriate timing.

[0266] (Wireless Communication System)

[0267] The structure of a wireless communication system according to one embodiment of this disclosure will be described below. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of this disclosure.

[0268] Figure 14 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment. The wireless communication system 1 can also be a system that uses Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) as standardized by the Third Generation Partnership Project (3GPP).

[0269] Furthermore, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0270] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0271] Wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (e.g., MN and SN are dual connectivity of NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0272] The wireless communication system 1 may also include: a base station 11 forming a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a-12c) configured within the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. User terminals 20 may also be located within at least one cell. The configuration and number of each cell and user terminal 20 are not limited to the arrangement shown in the figure. Hereinafter, without distinguishing between base stations 11 and 12, they will be collectively referred to as base station 10.

[0273] User terminal 20 may also connect to at least one of multiple base stations 10. User terminal 20 may also utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0274] Each CC can 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)). Macro cell C1 can also be included in FR1, and small cell C2 can also be included in FR2. For example, FR1 can also be a frequency band below 6 GHz (sub-6 GHz), and FR2 can also be a frequency band above 24 GHz (above-24 GHz). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to these; for example, FR1 can also be equivalent to a frequency band higher than FR2.

[0275] In addition, user terminal 20 can also communicate in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0276] Multiple base stations 10 can also be connected via wired (e.g., fiber optic cable based on the Common Public Radio Interface (CPRI), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, base station 11, which is equivalent to a host station, can also be referred to as an Integrated Access Backhaul (IAB) donor, and base station 12, which is equivalent to a relay station, can also be referred to as an IAB node.

[0277] Base station 10 may also be connected to core network 30 via other base stations 10 or directly. Core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0278] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0279] In wireless communication system 1, wireless access methods based on Orthogonal Frequency Division Multiplexing (OFDM) can also be used. For example, in at least one of the downlink (DL) and uplink (UL) links, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA) can also be used.

[0280] Wireless access methods can also be referred to as waveforms. In addition, in wireless communication system 1, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be applied in the wireless access methods of UL and DL.

[0281] As a downlink channel, the wireless communication system 1 can also use downlink shared channels (Physical Downlink Shared Channel (PDSCH)), broadcast channels (Physical Broadcast Channel (PBCH)), downlink control channels (Physical Downlink Control Channel (PDCCH)) and so on, which are shared by each user terminal 20.

[0282] In addition, as uplink channels, the wireless communication system 1 may also use uplink shared channels (Physical Uplink Shared Channel (PUSCH)), uplink control channels (Physical Uplink Control Channel (PUCCH)), random access channels (Physical Random Access Channel (PRACH)) and so on, which are shared by each user terminal 20.

[0283] User data, high-level control information, and System Information Blocks (SIBs) are transmitted via PDSCH. User data and high-level control information can also be transmitted via PUSCH. Furthermore, Master Information Blocks (MIBs) can be transmitted via PBCH.

[0284] Lower-layer control information can also be transmitted via PDCCH. This lower-layer control information may include, for example, downlink control information (DCI), which includes scheduling information for at least one of PDSCH and PUSCH.

[0285] Additionally, the DCI for scheduling PDSCH can also be called DL allocation, DL DCI, etc., and the DCI for scheduling PUSCH can also be called UL authorization, UL DCI, etc. Furthermore, PDSCH can also be replaced with DL data, and PUSCH can also be replaced with UL data.

[0286] In PDCCH detection, a Control Resource Set (CORESET) and a search space can be utilized. A CORESET corresponds to the resources used to search for DCIs. The search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor CORESETs associated with a specific search space based on search space settings.

[0287] A search space can also correspond to a PDCCH candidate that matches one or more aggregation levels. One or more search spaces can also be referred to as a search space set. In addition, the terms "search space", "search space set", "search space setting", "search space set setting", "CORESET", and "CORESET setting" used in this disclosure can be used interchangeably.

[0288] Uplink control information (UCI) can also be transmitted via PUCCH, including at least one of the following: Channel State Information (CSI), delivery confirmation information (e.g., also known as Hybrid Automatic Repeat reQuest ACK knowledgement (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR). Random access preambles used for establishing a connection with the cell can also be transmitted via PRACH.

[0289] Furthermore, in this disclosure, downlink, uplink, etc., may be described without the word "link". Additionally, various channels may be described without the word "physical".

[0290] In wireless communication system 1, synchronization signals (SS) and downlink reference signals (DL-RS) can also be transmitted. As DL-RS, wireless communication system 1 can also transmit cell-specific reference signals (CRS), channel state information reference signals (CSI-RS), demodulation reference signals (DMRS), positioning reference signals (PRS), phase tracking reference signals (PTRS), etc.

[0291] Synchronization signals can be, for example, at least one of the primary synchronization signal (PSS) and the secondary synchronization signal (SSS). A signal block containing SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be called an SS / PBCH block, SS block (SSB), etc. Furthermore, SS, SSB, etc., can also be called reference signals.

[0292] Furthermore, in the wireless communication system 1, the uplink reference signal (UL-RS) can also transmit measurement reference signals (sounding reference signals (SRS)) and demodulation reference signals (DMRS). Additionally, the DMRS can also be referred to as a user terminal-specific reference signal (UE-specific reference signal).

[0293] (Base station)

[0294] Figure 15 This diagram illustrates an example of the structure of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmit / receive unit 120, a transmit / receive antenna 130, and a transmission path interface (transmission line interface) 140. Alternatively, the control unit 110, the transmit / receive unit 120, the transmit / receive antenna 130, and the transmission path interface 140 may each be provided in more than one manner.

[0295] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the base station 10 may also possess other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0296] The control unit 110 performs overall control of the base station 10. The control unit 110 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the art to which this disclosure pertains.

[0297] The control unit 110 can also control signal generation and scheduling (e.g., resource allocation, mapping). The control unit 110 can also control transmission, reception, and measurement using the transmit / receive unit 120, transmit / receive antenna 130, and transmission path interface 140. The control unit 110 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmit / receive unit 120. The control unit 110 can also perform call processing (setting, releasing, etc.) of the communication channel, status management of the base station 10, and management of wireless resources.

[0298] The transmitting / receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting / receiving unit 120 can be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0299] The transmitting and receiving unit 120 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 1211 and an RF unit 122. The receiving unit can also be composed of a receiving processing unit 1212, an RF unit 122, and a measurement unit 123.

[0300] The transmitting and receiving antenna 130 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0301] The transmitting / receiving unit 120 can also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 can also receive the aforementioned uplink channel, uplink reference signal, etc.

[0302] The transmitting and receiving unit 120 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0303] The transmitting and receiving unit 120 (transmitting processing unit 1211) may, for example, perform processing at the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer (e.g., RLC retransmission control), and Medium Access Control (MAC) layer (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 110, and generate a bit string to be transmitted.

[0304] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform transmission processing such as channel coding (which may also include error correction coding), modulation, mapping, filter processing, Discrete Fourier Transform (DFT) processing (as needed), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output the baseband signal.

[0305] For baseband signals, the transmitting and receiving unit 120 (RF unit 122) can also perform modulation, filtering, amplification, etc., to the wireless frequency band, and transmit the wireless frequency band signals through the transmitting and receiving antenna 130.

[0306] On the other hand, the transmitting and receiving unit 120 (RF unit 122) can also amplify, filter, demodulate baseband signals, etc., for signals in the wireless frequency band that are received by the transmitting and receiving antenna 130.

[0307] For the acquired baseband signal, the transmitting and receiving unit 120 (receiving and processing unit 1212) can also perform receiving and processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to acquire user data.

[0308] The transmitting / receiving unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc., based on the received signal. The measurement unit 123 can also measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 110.

[0309] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between the device included in the core network 30 and other base stations 10, and can also acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0310] In addition, the transmitting unit and receiving unit of the base station 10 in this disclosure may also be composed of at least one of the transmitting and receiving unit 120, the transmitting and receiving antenna 130 and the transmission path interface 140.

[0311] The transmitting / receiving unit 120 can also transmit a Media Access Control-Control Element (MAC CE) to indicate the transmission setting indication state, i.e., the TCI state. When a specific uplink signal meets application conditions, the transmitting / receiving unit 120 can also receive the specific uplink signal that uses spatial relationships to transmit the TCI state, after a timing delay following the transmission of an ACK for the MAC CE.

[0312] The transmit / receive unit 120 can also transmit a Media Access Control-Control Element (MAC CE) for indicating the transmission setting indication state (TCI state) or the path loss reference signal (PL-RS) reference signal. When a specific uplink signal meets application conditions, the transmit / receive unit 120 can also receive the specific uplink signal transmitted using the reference signal in the path loss calculation, after a timing delay following the transmission of an ACK for the MAC CE.

[0313] (User terminal)

[0314] Figure 16 This diagram illustrates an example of the structure of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Alternatively, more than one of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be included.

[0315] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the user terminal 20 may also possess other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0316] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the art to which this disclosure pertains.

[0317] The control unit 210 can also control signal generation, mapping, etc. The control unit 210 can also control transmission, reception, measurement, etc., using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmission / reception unit 220.

[0318] The transmitting / receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting / receiving unit 220 may be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0319] The transmitting and receiving unit 220 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit can also be composed of a receiving processing unit 2212, an RF unit 222, and a measurement unit 223.

[0320] The transmitting and receiving antenna 230 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0321] The transmitting / receiving unit 220 can also receive the downlink channel, synchronization signal, downlink reference signal, etc., mentioned above. The transmitting / receiving unit 220 can also transmit the uplink channel, uplink reference signal, etc., mentioned above.

[0322] The transmitting and receiving unit 220 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0323] The transmitting and receiving unit 220 (transmitting processing unit 2211) may, for example, perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 210, and generate the bit string to be transmitted.

[0324] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output the baseband signal.

[0325] Furthermore, the application of DFT processing can be based on the transform precoding settings. For a specific channel (e.g., PUSCH), if transform precoding is active (enabled), the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above for transmitting the channel using the DFT-s-OFDM waveform. Otherwise, the transmit / receive unit 220 (transmit processing unit 2211) can perform the aforementioned transmit processing without performing DFT processing.

[0326] The transmitting and receiving unit 220 (RF unit 222) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 230.

[0327] On the other hand, the transmitting and receiving unit 220 (RF unit 222) can also amplify, filter, and demodulate the baseband signal for the wireless frequency band signal received by the transmitting and receiving antenna 230.

[0328] The transmitting and receiving unit 220 (receiving and processing unit 2212) can also perform receiving and processing on the acquired baseband signal, such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data.

[0329] The transmitting / receiving unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can also perform RRM measurements, CSI measurements, etc., based on the received signal. The measurement unit 223 can 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 can also be output to the control unit 210.

[0330] In addition, the transmitting unit and receiving unit of the user terminal 20 in this disclosure can also be constituted by at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.

[0331] The transmit / receive unit 220 can also receive a Media Access Control-Control Element (MAC CE) for indicating a transmit setting indication state, i.e., a TCI state. When a specific uplink signal meets application conditions, the control unit 210 can also apply the TCI state to the spatial relationship (e.g., at least one of the default spatial relationship and default PL-RS) of the specific uplink signal at a timing later than the ACK transmission for the MAC CE (e.g., UL switching timing).

[0332] The timing can also be 3ms + time offset after the ACK is sent.

[0333] The time offset when the TCI state is set for the physical downlink control channel can also be different from the time offset when the TCI state is set for the physical downlink shared channel.

[0334] The offset that satisfies the condition that the TCI state is considered known can also be different from the offset that does not satisfy the condition for the TCI state.

[0335] The transmit / receive unit 220 can also receive a Media Access Control-Control Element (MAC CE) used to indicate the transmission setting indication state (TCI state) or the path loss reference signal (PL-RS). When a specific uplink signal meets the application conditions, the control unit 210 can also use the reference signal for path loss calculation of the specific uplink signal at a timing later than the acknowledgment (ACK) transmission for the MAC CE.

[0336] When the reference signal is unknown, the timing can also be a time slot after N (e.g., 5) measurements following 3ms from the ACK transmission and the time used for measurement.

[0337] The measurement can also be a Layer 1 reference signal received power measurement, i.e., L1-RSRP measurement.

[0338] The measurement can also be a layer 1 signal-to-interference-plus-noise ratio measurement, i.e., L1-SINR measurement.

[0339] (Hardware Structure)

[0340] Furthermore, the block diagrams used in the description of the above embodiments illustrate functional units. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Moreover, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using a single device that is physically or logically combined, or it can be implemented by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. A functional block can also be implemented by combining one or more of the aforementioned devices with software.

[0341] Here, the functions include judgment, decision, determination, calculation, calculation, processing, export, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, choosing, establishing, comparison, assumption, expectation, regard as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, a functional block (structural unit) that implements the sending function can also be called a transmitting unit, transmitter, etc. As described above, the implementation method is not particularly limited.

[0342] For example, in one embodiment of this disclosure, the base station, user terminal, etc., can also function as a computer for processing the wireless communication method of this disclosure. Figure 17 This diagram illustrates an example of the hardware structure of a base station and a user terminal according to one embodiment. The base station 10 and the user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0343] Furthermore, in this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware structure of base station 10 and user terminal 20 can be configured to include one or more of the apparatuses shown in the figures, or it can be configured not to include any of the apparatuses.

[0344] For example, only one processor 1001 is shown, but there can be multiple processors. Furthermore, processing can be performed by one processor, or simultaneously, sequentially, or by two or more processors using other methods. Additionally, processor 1001 can be implemented using more than one chip.

[0345] The functions of the base station 10 and the user terminal 20 are implemented, for example, by reading specific software (programs) 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 reading and writing data in the memory 1002 and the storage device 1003.

[0346] The processor 1001, for example, enables the operating system to operate and control the computer as a whole. The processor 1001 may also be configured as a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, at least some of the control unit 110 (210), the transmit / receive unit 120 (220), etc. described above may also be implemented by the processor 1001.

[0347] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes accordingly. As a program, a program that causes the computer to perform at least a portion of the operations described in the above 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; similar implementations can be made for other functional blocks.

[0348] The memory 1002 may also be a computer-readable recording medium, such as being composed of at least one of read-only memory (ROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), random access memory (RAM), or other suitable storage media. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 is capable of storing executable programs (program code), software modules, etc., for implementing the wireless communication method according to one embodiment of the present disclosure.

[0349] Storage device 1003 may also be a computer-readable recording medium, such as at least one of a flexible disc, floppy disk, optical disk (e.g., compact disc ROM, CD-ROM), digital multifunction disk, Blu-ray disc, removable disk, hard disk, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium. Storage device 1003 may also be referred to as an auxiliary storage device.

[0350] The communication device 1004 is hardware (transmitting and receiving device) used for communication between computers via at least one of a wired network and a wireless network. It is also referred to as a network device, network controller, network interface card (NIC), communication module, etc. To implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the aforementioned transmitting and receiving unit 120 (220) and transmitting and receiving antenna 130 (230) can also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) can also be implemented by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0351] Input device 1005 is an input device that receives input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, light-emitting diode (LED) lamp, etc.). Alternatively, input device 1005 and output device 1006 can also be an integrated structure (e.g., touch panel).

[0352] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 can be configured as a single bus or as different buses between the devices.

[0353] Furthermore, the base station 10 and the user terminal 20 can 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), or a field-programmable gate array (FPGA), and can be used to implement some or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0354] (Modified Example)

[0355] Furthermore, the terms described in this disclosure, as well as those necessary for understanding this disclosure, may be replaced with terms that have the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be used interchangeably. Additionally, a signal may also be a message. A reference signal may also be abbreviated as RS, and may be referred to as pilot, pilot signal, etc., depending on the applied standard. Furthermore, a component carrier (CC) may also be referred to as cell, frequency carrier, carrier frequency, etc.

[0356] A radio frame can also be composed of one or more periods (frames) in the time domain. Each of these periods (frames) that constitutes a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set (numerology).

[0357] Here, the parameter set can also refer to communication parameters applied in at least one of the transmission and reception of a signal or channel. For example, the parameter set can also represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0358] In the time domain, a time slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.). Furthermore, a time slot can also be a time unit based on a set of parameters.

[0359] A time slot can also contain multiple mini-time slots. Each mini-time slot can also consist of one or more symbols in the time domain. Furthermore, a mini-time slot can also be called a sub-time slot. A mini-time slot can also consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-time slot can also be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-time slots can also be called PDSCH (PUSCH) mapping type B.

[0360] 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 can also use their respective other names. Furthermore, the time units such as frames, subframes, time slots, mini-time slots, and symbols used in this disclosure can be used interchangeably.

[0361] For example, a subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, and a time slot or a mini-time slot can also be called a TTI. That is to say, at least one of a subframe and a TTI can be a subframe in the existing LTE (1ms), a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing TTI may not be called a subframe, but a time slot, mini-time slot, etc.

[0362] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules radio resources (frequency bandwidth, transmit power, etc., available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0363] TTI can also be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., and can also be a unit of processing such as scheduling and link adaptation. In addition, when a TTI is given, the actual time interval (e.g., the number of symbols) mapped to transmission blocks, code blocks, codewords, etc. can be shorter than the TTI.

[0364] Additionally, where a time slot or a mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can also serve as the minimum time unit for scheduling. Furthermore, the number of time slots (mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0365] A TTI with a duration of 1 ms can also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), standard TTI, long TTI, normal subframe, standard subframe, long subframe, time slot, etc. A TTI shorter than a normal TTI can also be referred to as a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, mini time slot, sub-time slot, time slot, etc.

[0366] In addition, long TTIs (e.g., normal TTIs, subframes, etc.) can be replaced with TTIs with a duration of more than 1 ms, and short TTIs (e.g., shortened TTIs, etc.) can be replaced with TTIs with a duration of less than long TTIs but more than 1 ms.

[0367] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can also contain one or more consecutive subcarriers. The number of subcarriers in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers in an RB can also be determined based on the parameter set.

[0368] Furthermore, an RB can contain one or more symbols in the time domain, and can also be a time slot, a mini-time slot, a subframe, or the length of a TTI. A TTI, a subframe, etc., can also be composed of one or more resource blocks.

[0369] In addition, one or more RBs can also be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0370] Furthermore, a resource block can also consist of one or more resource elements (REs). For example, an RE can also be a radio resource area consisting of a subcarrier and a symbol.

[0371] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RBs) used for a certain parameter set in a certain carrier. Here, common RBs can also be determined by the index of RBs based on the common reference point of the carrier. PRBs can also be defined in a BWP and appended with numbers within that BWP.

[0372] A BWP can also include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs can also be set within a single carrier.

[0373] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Furthermore, terms such as "cell" and "carrier" in this disclosure can be replaced with "BWP".

[0374] Furthermore, the structures described above, such as radio frames, subframes, time slots, mini-time slots, and symbols, are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0375] Furthermore, the information, parameters, etc., described in this disclosure can be represented by absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by a specific index.

[0376] In this disclosure, the names used for parameters, etc., are not limiting names in any respect. Furthermore, the mathematical expressions, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name; therefore, the various names assigned to these various channels and information elements are not limiting names in any respect.

[0377] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be mentioned throughout the above description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0378] Furthermore, information, signals, etc., can be output in at least one of the following directions: from higher level (upper layer) to lower level (lower layer), and from lower layer to higher level. Information, signals, etc., can also be input and output via multiple network nodes.

[0379] Input and output information, signals, etc., can be stored in a specific location (e.g., memory) or managed using management tables. Input and output information, signals, etc., can be overwritten, updated, or appended. Output information, signals, etc., can also be deleted. Input information, signals, etc., can also be sent to other devices.

[0380] The notification of information is not limited to the methods / implementations described in this disclosure, and may also be carried out by other methods. For example, the notification of information in this disclosure may also be implemented by physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI), etc.), higher layer signaling (e.g., radio resource control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB) etc.), medium access control (MAC) signaling), other signals, or combinations thereof.

[0381] In addition, physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. Furthermore, RRC signaling can also be referred to as RRC messages, such as RRC connection setup messages, RRC connection reconfiguration messages, etc. Additionally, MAC signaling can also be notified using, for example, the MAC control element (CE).

[0382] Furthermore, notification of specific information (e.g., a notification that “is X”) is not limited to explicit notification, but can also be implicit (e.g., by not providing that specific information, or by providing other information).

[0383] The determination can be made by a value represented by a single bit (0 or 1), by a true or false value (boolean), or by a numerical comparison (e.g., a comparison with a specific value).

[0384] Whether it is called software, firmware, middleware, microcode, hardware description language, or any other name, software should be broadly interpreted as instructions, instruction sets, code, code segments, program code, program, subprogram, software module, application, software application, software package, routine, subroutine, object, executable file, execution thread, process, function, etc.

[0385] Furthermore, software, instructions, and information can 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 technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0386] The terms “system” and “network” as used in this disclosure are used interchangeably. “Network” may also mean devices included in a network (e.g., base stations).

[0387] In this disclosure, the terms "precoding", "precoder", "weight (precoding weight)", "quasi-co-location (QCL)", "transmission configuration indication state (TCI state)", "spatial relation", "spatial domain filter", "transmit power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beamwidth", "beam angle", "antenna", "antenna element", and "panel" are used interchangeably.

[0388] In this disclosure, the terms "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" are used interchangeably. There are also instances where the terms macro cell, small cell, femtocell, and picocell are used to refer to a base station.

[0389] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​the base station providing communication services within that coverage area, as well as at least one of the base station subsystems.

[0390] In this disclosure, the terms “Mobile Station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” are used interchangeably.

[0391] There are also instances where mobile stations are referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or several other appropriate terms.

[0392] At least one of the base station and the mobile station can also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Additionally, at least one of the base station and the mobile station can also be a device mounted on a mobile body, the mobile body itself, etc. This mobile body can be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body moving in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). Furthermore, at least one of the base station and the mobile station also includes devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station can also be an Internet of Things (IoT) device such as a sensor.

[0393] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, various methods / implementations of this disclosure can be applied to a structure where the communication between the base station and the user terminal is replaced by communication between multiple user terminals (e.g., also referred to as device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, it can also be configured such that the user terminal 20 has the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, uplink channel, downlink channel, etc., can also be replaced with side channel.

[0394] Similarly, the user terminal in this disclosure can also be replaced by a base station. In this case, it can also be configured such that the base station 10 has the functions of the user terminal 20 described above.

[0395] In this disclosure, actions purported to be performed by the base station are sometimes also performed by its upper node, depending on the circumstances. Clearly, in a network containing one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (e.g., considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or combinations thereof.

[0396] The various methods / implementations described in this disclosure can be used individually, in combination, or switched as needed during execution. Furthermore, the processing procedures, sequences, flowcharts, etc., of the various methods / implementations described in this disclosure can be rearranged as long as they do not contradict each other. For example, with respect to the method described in this disclosure, the illustrated order is used to indicate various steps, but the order in which they are indicated is not limited.

[0397] The various methods / implementations described in this disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future generation radio access (FX), Global System for Mobile Communications (GSM (registered trademark))), CDMA2000, Ultra Mobile Broadband (UMB), IEEE This includes 802.11 (Wi-Fi, registered trademark), IEEE 802.16 (WiMAX, registered trademark), IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (registered trademark), systems utilizing other suitable wireless communication methods, and next-generation systems derived from them. Furthermore, multiple systems can be combined (e.g., LTE or LTE-A, combinations with 5G, etc.) for application.

[0398] As used in this disclosure, the word "based on" does not mean "based on only" unless otherwise specified. In other words, the word "based on" means both "based on only" and "based on at least".

[0399] Any reference to an element using the designations "first," "second," etc., as used in this disclosure does not comprehensively limit the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, references to the first and second elements do not imply that only two elements may be used, or that the first element must take precedence over the second element in some form.

[0400] The term "determining" as used in this disclosure can encompass a wide variety of actions. For example, "determining" can also refer to judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), and ascertaining.

[0401] In addition, "judgment (decision)" can also refer to receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, accessing (e.g., accessing data in memory), etc., as situations where "judgment (decision)" is performed.

[0402] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, or comparing are considered as making a "judgment (decision)". In other words, "judgment (decision)" can also refer to certain actions as situations where a "judgment (decision)" is made.

[0403] In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0404] The term "maximum transmit power" as used in this disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0405] As used in this disclosure, the terms "connected," "coupled," or all variations thereof, refer to all direct or indirect connections or combinations between two or more elements, and can include cases where there is one or more intermediate elements between two mutually "connected" or "coupled" elements. The connections or combinations between elements can be physical, logical, or a combination thereof. For example, "connected" can also be replaced with "access."

[0406] In this disclosure, when two elements are connected, it is possible to use more than one wire, cable, printed electrical connection, etc., and to use electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region as several non-limiting and non-inclusive examples, so that they are "connected" or "combined" with each other.

[0407] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other". Additionally, this term can also mean "A and B are different from C respectively". Terms such as "separate" and "combined" can also be interpreted in the same way as "different".

[0408] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," mean inclusive. Furthermore, the term "or" as used in this disclosure does not mean XOR.

[0409] In this disclosure, for example, in cases where articles are added through translation, such as a, an, and the in English, the disclosure may also include cases where the noun following these articles is in a plural form.

[0410] The invention disclosed herein has been described in detail above. However, it will be apparent to those skilled in the art that the invention is not limited to the embodiments described herein. The invention can be implemented with modifications and variations without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description in this disclosure is for illustrative purposes only and is not intended to limit the invention in any way.

Claims

1. A terminal, comprising: The receiving unit receives a first Media Access Control-Control Element (MAC CE) for activating a first transmission setting indication TCI state, and a second MAC CE for indicating a second TCI state, wherein... The first TCI state is the TCI state of the path loss reference signal PL-RS, and the second TCI state is the TCI state of the control resource set CORESET; and The control unit performs the following actions: If the first TCI state is known, the PL-RS is switched during the first timing period 3ms after the positive ACK response to the first MAC CE is sent. When the first TCI state is unknown, the PL-RS is switched in a second timing period after a specific period has elapsed since the ACK for the first MAC CE was sent, wherein the specific period is the sum of 3ms and the time used for measuring the Layer 1-Reference Signal Received Power (L1-RSRP). When the high-layer parameters representing the activation information of the default beam path loss of the reference signal SRS for measurement are set, and neither the spatial relationship information nor the PL-RS is set for the SRS, the second TCI state is used for the spatial relationship of the SRS in a third timing period 3ms after the ACK transmission of the second MAC CE indicating the second TCI state.

2. A wireless communication method for a terminal, comprising: The steps of receiving a first Media Access Control-Control Element (MAC CE) for activating a first Transmission Setting Indicator (TCI) state and a second MAC CE for indicating a second TCI state, wherein... The first TCI state is the TCI state of the path loss reference signal PL-RS, and the second TCI state is the TCI state of the control resource set CORESET. When the first TCI state is known, the step of switching the PL-RS in the first timing period is performed 3ms after the positive ACK response is sent for the first MAC CE; When the first TCI state is unknown, the step of switching the PL-RS in a second timing period after a specific period has elapsed since the ACK transmission for the first MAC CE, wherein the specific period is the sum of 3ms and the time used for measuring the Layer 1-Reference Signal Received Power (L1-RSRP); and In the case where higher-layer parameters representing the activation information of the default beam path loss of the reference signal SRS for measurement are set, and neither spatial relationship information nor PL-RS is set for the SRS, the step of using the second TCI state for the spatial relationship of the SRS in the third timing is performed 3ms after the ACK transmission of the second MAC CE indicating the second TCI state.

3. A base station, comprising: The transmitting unit transmits a first Media Access Control-Control Element (MAC CE) for activating a first transmission setting indication TCI state, and a second MAC CE for indicating a second TCI state, wherein... The first TCI state is the TCI state of the path loss reference signal PL-RS, and the second TCI state is the TCI state of the control resource set CORESET; and The control unit performs the following actions: If the first TCI state is known, after 3ms from the transmission of the positive ACK response to the first MAC CE, it is determined in the first timing that the PL-RS has been switched. When the first TCI state is unknown, after a specific period elapsed since the ACK transmission for the first MAC CE, it is determined in the second timing that the PL-RS has been switched. The specific period is the sum of 3ms and the time used for measuring the Layer 1 Reference Signal Received Power (L1-RSRP). When the higher-layer parameters representing the activation information of the default beam path loss of the reference signal SRS for measurement are set, and neither the spatial relationship information nor the PL-RS is set for the SRS, the reception of the SRS transmitted for the spatial relationship of the SRS is controlled in a third timing period 3ms after the ACK of the second MAC CE indicating the second TCI state is sent.

4. A system having a terminal and a base station, wherein, The terminal has: The receiving unit receives a first Media Access Control-Control Element (MAC CE) for activating a first transmit setting indication TCI state, and a second MAC CE for indicating a second TCI state, wherein the first TCI state is the TCI state of the path loss reference signal PL-RS, and the second TCI state is the TCI state of the control resource set CORESET; and The control unit performs the following actions: If the first TCI state is known, the PL-RS is switched during the first timing period 3ms after the positive ACK response to the first MAC CE is sent. When the first TCI state is unknown, the PL-RS is switched in a second timing period after a specific period has elapsed since the ACK for the first MAC CE was sent, wherein the specific period is the sum of 3ms and the time used for measuring the Layer 1-Reference Signal Received Power (L1-RSRP). When higher-layer parameters representing the activation information of the default beam path loss of the reference signal SRS for measurement are set, and neither spatial relationship information nor PL-RS is set for the SRS, the second TCI state is used for the spatial relationship of the SRS in a third timing period 3ms after the ACK transmission of the second MAC CE indicating the second TCI state. The base station has: The transmitting unit transmits the first MAC CE and the second MAC CE.

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