WO2026018353A1 - Terminal, wireless communication method, and base station - Google Patents

Abstract

A terminal according to one aspect of the present disclosure includes: a control unit that controls measurement of a reference signal corresponding to a current beam and a reference signal corresponding to a new beam; and a transmission unit that transmits the measurement result for the reference signal corresponding to the current beam and/or the measurement result for the reference signal corresponding to the new beam. When a plurality of schemes usable for measurement of the reference signal corresponding to the current beam are supported, the control unit determines the scheme to be used for measurement of the reference signal corresponding to the current beam on the basis of at least one of: the type of the new beam reference signal; a quasi-collocation reference signal (QCL RS) or a measurement reference signal corresponding to the transmission configuration index (TCI) state indicated for the current beam; and an upper layer parameter.

Description

Terminal, wireless communication method and base station

This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems.

Long Term Evolution (LTE) was specified for Universal Mobile Telecommunications System (UMTS) networks with the aim of achieving even higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was specified with the aim of achieving even greater capacity and sophistication over LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8 and 9).

Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later, etc.) are also being considered.

3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Univers al　Terrestrial　Radio　Access　Network　(E-UTRAN);　Overall　description;　Stage 2　(Release　8)”, April 2010

In future wireless communication systems (e.g., NR, Rel. 19 and later), it is being considered to support UE-initiated Beam Report (UEIBR), which is an event-based beam report initiated by the terminal (user terminal, User Equipment (UE)).

Such beam reporting is being considered for support in MIMO/mobility in Rel. 19 and beyond.

However, there are cases where sufficient consideration has not been given to how to control the measurement/reporting of reference signals in UEIBR. If the measurement/reporting of reference signals is not controlled appropriately, there is a risk of degradation in communication quality.

Therefore, one of the objectives of this disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately measure and report reference signals in future wireless communication systems.

A terminal according to one aspect of the present disclosure includes a control unit that controls measurement of a reference signal corresponding to a current beam and a reference signal corresponding to a new beam, and a transmission unit that transmits at least one of the measurement results of the reference signal corresponding to the current beam and the measurement results of the reference signal corresponding to the new beam, and when multiple schemes that can be used for measuring the reference signal corresponding to the current beam are supported, the control unit determines the scheme to be used for measuring the reference signal corresponding to the current beam based on at least one of the type of reference signal of the new beam, a quasi-co-location reference signal (QCL RS) or measurement reference signal corresponding to the transmit configuration indicator (TCI) state indicated for the current beam, and upper layer parameters.

According to one aspect of the present disclosure, reference signals can be measured and reported appropriately in future wireless communication systems.

Figure 1A is a diagram showing an example of UE movement in Rel. 17. Figure 1B is a diagram showing an example of UE movement in Rel. 18. FIG. 2 is a diagram showing an example of combinations of signals/channels transmitted/received in the first to third steps. Figure 3 shows an example of TRS/SSB/CSI-RS association when only TRS is set in the QCL RS in the indicated TCI state. FIG. 4 is a diagram showing an example of an SSB beam and multiple TRS/CSI-RS beams associated with the SSB. Figure 5A shows another example of TRS/SSB/CSI-RS when only TRS is set in the QCL RS in the indicated TCI state. Figure 5B shows an example of an SSB beam and a beam of one TRS/CSI-RS associated with the SSB. FIG. 6 is a diagram illustrating an example of a method for determining the RS of a current beam to be measured according to the first embodiment. FIG. 7 is a diagram illustrating another example of the method for determining the RS of the current beam to be measured according to the first embodiment. 8A and 8B are diagrams illustrating another example of the method for determining the RS of a current beam to be measured according to the first embodiment. 9A and 9B are diagrams illustrating another example of the method for determining the RS of a current beam to be measured according to the first embodiment. 10A and 10B are diagrams illustrating another example of the method for determining the RS of a current beam to be measured according to the first embodiment. 11A and 11B are diagrams illustrating an example of a method for determining the RS of a current beam to be measured according to the second embodiment. 12A and 12B are diagrams illustrating an example of a method for reporting the RS of a current beam according to the third embodiment. 13A and 13B are diagrams illustrating another example of the method for reporting the RS of the current beam according to the third embodiment. FIG. 14 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 15 is a diagram illustrating an example of the configuration of a base station according to an embodiment. FIG. 16 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. FIG. 17 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. FIG. 18 is a diagram illustrating an example of a vehicle according to an embodiment.

(CSI report)
In NR, a UE measures the channel state using a predetermined reference signal (or a resource for the reference signal) and feeds back (reports) channel state information (CSI) to the base station.

The UE may measure the channel state using a Channel State Information Reference Signal (CSI-RS), a Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block, a Synchronization Signal (SS), a Demodulation Reference Signal (DMRS), etc.

The CSI-RS resource may include at least one of non-zero power (NZP) CSI-RS and CSI-Interference Management (IM). An SS/PBCH block is a block containing a synchronization signal (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)) and a PBCH (and corresponding DMRS), and may be referred to as an SS block (SSB). An SSB index may be assigned to the time position of the SSB within the half-frame.

The CSI may include at least one of the following: a channel quality indicator (CQI), a precoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), a SS/PBCH block resource indicator (SS/PBCH block indicator (SSBRI), a layer indicator (LI), a rank indicator (RI), a Layer 1 (L1)-Reference Signal Received Power (RSRP), a L1-Reference Signal Received Quality (RSRQ), a L1-Signal to Interference plus Noise Ratio (SINR), a L1-Signal to Noise Ratio (SNR), etc.

The UE may be notified of information related to CSI reporting (which may be referred to as CSI reporting configuration information) using higher layer signaling, physical layer signaling (e.g., Downlink Control Information (DCI)), or a combination of these. The CSI reporting configuration information may be configured, for example, using the RRC information element "CSI-ReportConfig."

The CSI reporting configuration information may include, for example, information regarding the reporting period, offset, etc., which may be expressed in a predetermined time unit (slot unit, subframe unit, symbol unit, etc.). The CSI reporting configuration information may also include a configuration ID (CSI-ReportConfigId). The configuration ID may specify parameters such as the type of CSI reporting method (whether it is SP-CSI, etc.) and the reporting period. The CSI reporting configuration information may also include information (CSI-ResourceConfigId) indicating which signal (or which signal resource) is used to report the measured CSI.

(Beam Management)
In Rel-15 NR, a beam management (BM) method has been studied. In the beam management, beam selection is performed based on the L1-RSRP reported by the UE. Changing (switching) the beam of a certain signal/channel may correspond to changing the (Transmission Configuration Indication state) of the signal/channel.

Note that the beam selected by beam selection may be a transmission beam (Tx beam) or a reception beam (Rx beam). Also, the beam selected by beam selection may be a UE beam or a base station beam.

The UE may report (transmit) measurement results for beam management using PUCCH or PUSCH. The measurement results may be CSI including at least one of L1-RSRP, L1-RSRQ, L1-SINR, L1-SNR, etc. The measurement results may also be called beam measurements, beam measurement results, beam reports, beam measurement reports, etc.

CSI measurements for beam reporting may include interference measurements. The UE may measure channel quality, interference, etc. using resources for CSI measurement and derive beam reporting. The resources for CSI measurement may be, for example, at least one of SS/PBCH block resources, CSI-RS resources, other reference signal resources, etc. Configuration information for CSI measurement reporting may be configured in the UE using higher layer signaling.

The beam report may include at least one of the results of a channel quality measurement and an interference measurement. The channel quality measurement result may include, for example, L1-RSRP. The interference measurement result may include L1-SINR, L1-SNR, L1-RSRQ, or other interference-related indicators (e.g., any indicator other than L1-RSRP).

Note that resources for measuring CSI for beam management may be referred to as beam measurement resources. Furthermore, the signals/channels for which the CSI is measured may be referred to as beam measurement signals. Furthermore, CSI measurement/reporting may be interpreted as at least one of measurement/reporting for beam management, beam measurement/reporting, radio link quality measurement/reporting, etc.

CSI reporting configuration information that takes into account current NR beam management is included in the RRC information element "CSI-ReportConfig." The information in the RRC information element "CSI-ReportConfig" is explained below.

The CSI reporting configuration information (CSI-ReportConfig) may include reporting quantity information ("report quantity", which may be expressed as the RRC parameter "reportQuantity"), which is information on the parameters to be reported. The reporting quantity information is defined as an ASN.1 object type called "choice." Therefore, one of the parameters defined as reporting quantity information (cri-RSRP, ssb-Index-RSRP, etc.) is set.

A UE that has enabled higher layer parameters (e.g., the RRC parameter "groupBasedBeamReporting") included in the CSI reporting configuration information may include multiple beam measurement resource IDs (e.g., SSBRI, CRI) and multiple corresponding measurement results (e.g., L1-RSRP) in its beam report for each reporting configuration.

A UE that has configured one or more numbers of RS resources to be reported by higher layer parameters included in the CSI reporting configuration information (e.g., the RRC parameter "nrofReportedRS") may include in its beam report one or more beam measurement resource IDs and one or more corresponding measurement results (e.g., L1-RSRP) for each reporting configuration.

(TCI, spatial relationships, QCL)
In NR, it is considered to control the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and encoding) in the UE of at least one of the signal and the channel (referred to as the signal/channel) based on the transmission configuration indication state (TCI state).

TCI states may refer to those that apply to downlink signals/channels. The equivalent of TCI states that apply to uplink signals/channels may be expressed as spatial relations.

TCI status is information about the quasi-co-location (QCL) of signals/channels, and may also be called spatial reception parameters, spatial relation information, etc. The TCI status may be set in the UE for each channel or signal.

QCL is an index that indicates the statistical properties of a signal/channel. For example, if a signal/channel has a QCL relationship with another signal/channel, it may mean that it can be assumed that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameters (e.g., spatial Rx parameters) is the same between these different signals/channels (i.e., they have QCL with respect to at least one of these).

Note that the spatial reception parameters may correspond to the reception beam of the UE (e.g., a reception analog beam), and the beam may be identified based on the spatial QCL. In this disclosure, the QCL (or at least one element of the QCL) may be interpreted as sQCL (spatial QCL).

A plurality of types (QCL types) of QCL may be defined. For example, four QCL types A to D may be provided, each having different parameters (or parameter sets) that can be assumed to be the same. The parameters (which may be referred to as QCL parameters) are as follows:
QCL Type A (QCL-A): Doppler shift, Doppler spread, mean delay and delay spread,
QCL Type B (QCL-B): Doppler shift and Doppler spread,
QCL Type C (QCL-C): Doppler shift and mean delay,
QCL Type D (QCL-D): Spatial reception parameters.

The UE's assumption that a given Control Resource Set (CORESET), channel, or reference signal has a particular QCL (e.g., QCL type D) relationship with another CORESET, channel, or reference signal may be referred to as a QCL assumption.

The UE may determine at least one of the transmit beam (Tx beam) and receive beam (Rx beam) for a signal/channel based on the TCI condition or QCL assumption of the signal/channel.

The TCI state may be, for example, information regarding the QCL between the target channel (in other words, the reference signal (RS) for that channel) and another signal (e.g., another RS). The TCI state may be set (indicated) by higher layer signaling, physical layer signaling, or a combination of these.

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

Furthermore, the RS that has a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a sounding reference signal (SRS), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called a QRS).

An SSB is a signal block that includes at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). An SSB may also be referred to as an SS/PBCH block.

The TCI state information element (RRC's "TCI-state IE") set by higher layer signaling may include one or more pieces of QCL information ("QCL-Info"). The QCL information may include at least one of information about the RSs with which the QCL relationship exists (RS relationship information) and information indicating the QCL type (QCL type information). The RS relationship information may include information such as the index of the RS (e.g., SSB index, Non-Zero-Power (NZP) CSI-RS resource identifier), the index of the cell in which the RS is located, and the index of the Bandwidth Part (BWP) in which the RS is located.

In Rel. 15 NR, both QCL type A RS and QCL type D RS, or only QCL type A RS, can be configured for a UE as the TCI state for at least one of the PDCCH and PDSCH.

When a TRS is configured as a QCL Type A RS, unlike the demodulation reference signal (DMRS) for PDCCH or PDSCH, the same TRS is expected to be transmitted periodically over a long period of time. The UE can measure the TRS and calculate the average delay, delay spread, etc.

A UE that has the TRS configured as a QCL Type A RS in the TCI state of the DMRS of a PDCCH or PDSCH can assume that the QCL Type A parameters (average delay, delay spread, etc.) of the DMRS of a PDCCH or PDSCH and the TRS are the same, and can therefore determine the Type A parameters (average delay, delay spread, etc.) of the DMRS of a PDCCH or PDSCH from the measurement results of the TRS. When performing channel estimation for at least one of the PDCCH and PDSCH, the UE can perform more accurate channel estimation using the measurement results of the TRS.

A UE configured with a QCL type D RS can use the QCL type D RS to determine the UE receiving beam (spatial domain receiving filter, UE spatial domain receiving filter).

An RS of QCL type X in a TCI state may refer to an RS that has a QCL type X relationship with a certain channel/signal (DMRS), and this RS may be called a QCL source of QCL type X in that TCI state.

(L1/L2 inter-cell mobility)
The UE may perform UL transmission to one or more cells/TRPs. The following scenario 1 or scenario 2 may be considered as a procedure in this case. In the present disclosure, the serving cell may be interpreted as a TRP in the serving cell. Layer 1/layer 2 (L1/L2) and DCI/Medium Access Control Control Element (MAC CE) may be interpreted as interchangeable. In the present disclosure, a physical cell identity (PCI) different from the physical cell identity (PCI) of the current serving cell may be simply referred to as a "different PCI." A non-serving cell, a cell having a different PCI, and an additional cell may be interpreted as interchangeable.

<Scenario 1>
Scenario 1 corresponds to, for example, multi-TRP inter-cell mobility, but it may also be a scenario that does not correspond to multi-TRP inter-cell mobility.

(1) The UE receives from the serving cell the configuration necessary to use radio resources for data transmission and reception, including SSB configuration for beam measurement of a TRP corresponding to a PCI different from that of the serving cell, and resources of a different PCI.
(2) The UE performs beam measurement of TRPs corresponding to different PCIs and reports the beam measurement results to the serving cell.
(3) Based on the above report, the Transmission Configuration Indication (TCI) states associated with the TRPs corresponding to different PCIs are activated by L1/L2 signaling from the serving cell.
(4) The UE transmits and receives using UE-dedicated channels on TRPs corresponding to different PCIs.
(5) The UE must always cover the serving cell, including in the case of multi-TRP. The UE must use common channels (Broadcast Control Channel (BCCH) and Paging Channel (PCH)) from the serving cell, as in conventional systems.

In Scenario 1, when the UE transmits and receives signals to an additional cell/TRP (a TRP corresponding to the PCI of the additional cell), the serving cell (the UE's assumption of the serving cell) is not changed. The UE is configured with higher layer parameters related to the PCI of non-serving cells from the serving cell. Scenario 1 may be applied, for example, in Rel. 17.

Figure 1A shows an example of UE movement in Rel. 17. Assume that the UE moves from a cell with PCI #1 (serving cell) to a cell with PCI #3 (additional cell) (which overlaps with the serving cell). In this case, Rel. 17 does not support switching of serving cells via L1/L2.

An additional cell is a cell with an additional PCI that is different from the PCI of the serving cell. The UE can receive/transmit UE-dedicated channels from the additional cell. The UE must be within the coverage of the serving cell to receive UE common channels (e.g., system information/paging/short messages). If the UE moves out of the coverage of the serving cell, it must switch cells, for example, through handover (also known as L3 mobility).

<Scenario 2>
In scenario 2, L1/L2 inter-cell mobility is applied. With L1/L2 inter-cell mobility, the serving cell can be changed using functions such as beam control without RRC reconfiguration. In other words, transmission and reception with an additional cell is possible without handover. Since handover requires RRC reconnection and creates a period when data communication is unavailable, applying L1/L2 inter-cell mobility that does not require handover allows data communication to continue even when the serving cell is changed. Scenario 2 may be applied, for example, in Rel. 18. In scenario 2, for example, the following procedure is performed.

(1) The UE receives SSB configuration for a cell (additional cell) with a different PCI from the serving cell due to beam measurement/serving cell change.
(2) The UE performs beam measurements of cells using different PCIs and reports the measurement results to the serving cell.
(3) The UE may receive a configuration of a cell with a different PCI (serving cell configuration) through higher layer signaling (e.g., RRC). That is, a pre-configuration regarding a serving cell change may be performed. This configuration may be performed together with the configuration in (1) or separately.
(4) Based on the above reports, the TCI states of cells with different PCIs may be activated by L1/L2 signaling according to the change of serving cell. The activation of the TCI states and the change of serving cell may be performed separately.
(5) The UE changes the serving cell (assumed serving cell) and starts receiving/transmitting using the pre-configured UE-specific channel and TCI state.

In other words, in Scenario 2, the serving cell (the assumed serving cell for the UE) is updated via L1/L2 signaling. Scenario 2 may be applied in Rel. 18.

Figure 1B shows an example of UE movement in Rel. 18. In Rel. 18, the serving cell is switched using L1/L2 (e.g., DCI/MAC CE). The UE can receive/transmit UE-dedicated channels/common channels to/from the new serving cell (or target serving cell). The UE may move out of the coverage of the current serving cell (e.g., current serving cell).

(Events/Containers for UEIBR)
From Rel. 19 onwards, support for event-based beam reporting (UE-initiated beam reporting (UEIBR))/UE-initiated beam management (UEIBM) is being considered. UEIBR/UEIBM can be used for measurement reporting, beam switching, cell switching, etc.

In UEIBR, it is considered that the beam report includes at least one of the following information as report content:
Beam/reference signal index (e.g., CSI-RS/SSB resource index/indicator).
Measurement results (e.g., L1-RSRP/SINR (absolute value/relative value)).
Number of beams/RS reported.
• Whether the serving beam is included in the beam report.

Regarding the information regarding the number of beams/RSs to be reported, the base station/network and the UE must have a common understanding of the size of the beam report (e.g., UCI), so it is preferable that this information be included in the beam report reported by the UE.

In this case, the UCI may be reported in two parts. For example, the UCI (which may be of a fixed size) transmitted in the first part (step) may indicate the size (e.g., number of beams) of the UCI transmitted in the second part (step).

In this case, the UCI may be coded in two parts. For example, the size of the second part of the UCI may be indicated by the first part of the UCI (which may be fixed in size).

The events related to UEIBR (as mentioned above) may be broadly categorized into the following event types:
Event 1: The quality of the current beam becomes worse than a certain threshold.
Event 2: The quality (e.g., L1-RSRP) of at least one new beam becomes better than a certain threshold compared to the quality of the current beam.
Event 3: The quality of the new beam is better than a certain threshold.
Event 4: The quality of the current beam becomes worse than a first threshold and the quality of at least one new beam becomes better than a second threshold.
Event 5: The absolute value of the difference between the quality of the current beam and the quality of at least one new beam falls below a certain threshold.
Event 6: The current beam is no longer among the best K (more than 1: K>1) beams (among those configured for measurement/reporting).
Event 7a: The quality (e.g. L1-RSRP) of at least one new beam is a threshold better than the RS derived from the worst activated (active) TCI state.
Event 7b: The quality (eg L1-RSRP) of at least one new beam is a threshold better than the RS derived from the best quality activated (active) TCI state.
Event 8: The quality (e.g., L1-RSRP) of M (more than 1: M>1) new beams reaches a threshold that is better than the current beam.
Event 9: The quality (e.g. L1-RSRP) of at least one new beam reaches a threshold value better than the configured reference RS (which may be SSB/CSI-RS).

Note that such event types do not exclude the events described above. For example, such event types may be interpreted as the events described above, as appropriate.

In addition, one or more of the following options are being considered as containers/methods for beam reporting in UEIBR:

<Option 1>
The container for the beam report in the UEIBR may be a MAC CE.

MAC CE-based beam reporting may be performed according to steps 1.1 to 1.3 below.

<<Step 1.1>>
When a triggering event occurs, the UE may send a scheduling request (SR) for a request for an UL shared channel (UL-SCH, eg, PUSCH).

<<Step 1.2>>
The UE may detect the DCI format for the UL grant.

<<Step 1.3>>
The beam report may be transmitted/sent by a MAC CE in a new transmission of a PUSH.

Steps 1.1 and 1.2 may be skipped/omitted if UL-SCH resources are available for new transmissions.

MAC CEs may be transmitted/sent on dynamically scheduled resources or semi-statically configured resources.

<Option 2>
The container for the beam report in the UEIBR may be UCI (dynamically scheduled by the base station).

UCI-based beam reporting for Option 2 may be performed according to steps 2.1 to 2.3 below.

<<Step 2.1>>
The UE may transmit a first UL channel (e.g., PUSCH/PUCCH) to request resources for a second UL channel (e.g., PUSCH/PUCCH) that carries a beam report.

The first UL channel may be one bit or multiple bits.

The resources of the first UL channel may be UE-specific resources.

<<Step 2.2>>
The UE may detect a DCI format that indicates resources for a second UL channel that transmits the beam report.

<<Step 2.3>>
The beam report may be transmitted/sent via a second UL channel (UCI).

This option may be defined as a basic UE capability.

Also, with this option, the new DCI format does not need to be used.

<Option 3>
The container of the beam report in the UEIBR may be a UCI (in which resources for the first/second UL channel are pre-configured).

UCI-based beam reporting for Option 3 may be performed according to steps 3.1 to 3.2 below.

<<Step 3.1>>
The UE may transmit a first UL channel (e.g., PUSCH/PUCCH) notifying a second UL channel (e.g., PUSCH/PUCCH) that carries a beam report.

The first UL channel may be one bit or multiple bits.

The resources of the first UL channel may be UE-specific resources.

<<Step 3.2>>
The UE may transmit the beam report in a second UL channel (UCI).

The resources of the second UL channel may be UE-specific resources or may be shared (common) resources by multiple UEs.

Resources for the second UL channel specific to UEIBR may be pre-configured (option 3a) or not (option 3b).

<Option 4a>
The container for the beam report in UEIBR may be UCI (in pre-configured resources used only for UEIBR).

For UCI-based beam reporting for option 4a, the UE may perform the operations described in step 4a.1 below.

<<Step 4a.1>>
When a trigger event occurs, or based on the UE implementation, the UE may send a beam report on a pre-configured resource.

These resources may be UE-specific resources or may be shared (common) resources by multiple UEs.

<Option 4b>
The container for the beam report in UEIBR may be UCI (in pre-configured resources not specific to UEIBR).

For UCI-based beam reporting for option 4a, the UE may perform the operations described in step 4b.1 below.

<<Step 4b.1>>
When a trigger event occurs, the UE may transmit a beam report on a pre-configured resource.

The beam report (UCI) may be divided into multiple parts (e.g., a first and a second part). For example, the first part may indicate information related to the second part, and the beam report may be transmitted in the second part.

These multiple parts may be transmitted on the same PUCCH/PUSCH resource.

<Option 5>
The container for the beam report in the UEIBR may be the UCI.

For UCI-based beam reporting for option 5, the UE may perform the operations described in steps 5.1 to 5.3 below.

<<Step 5.1>>
The UE may transmit a first UL channel (e.g., PUSCH/PUCCH) to notify/request resources in advance for a second UL channel (e.g., PUSCH/PUCCH) that transmits a beam report.

The first UL channel may be one bit or multiple bits.

The format/type of the first UL channel (notification/request) may be SR or a new UCI (UCI other than HARQ-ACK/CSI/SR).

<<Step 5.2>>
The UE may detect a DCI format that indicates resources for a second UL channel that transmits the beam report.

This DCI format may be a response signal to the transmission in step 5.1 above.

Step 5.2 may be performed when the corresponding RRC configuration is configured (enabled) by the network.

Support for step 5.2 may be defined as a basic UE capability.

<<Step 5.3>>
The beam report may be transmitted/sent by a second UL channel (PUCCH/PUSCH carrying UCI).

If the RRC configuration corresponding to step 5.2 is enabled, the resources of the second UL channel may be determined from pre-configured UL resources, may be scheduled based on the DCI format, or may be determined based on a combination of these.

If the RRC configuration corresponding to step 5.2 is not enabled, the resources for the second UL channel may be determined from pre-configured UL resources.

The notification/request sent in step 5.1 and the beam report sent in step 5.3 may be sent in separate reporting instances.

In at least one of steps 1, 2, 3, 4a, 4b, and 5 above, the UE may receive acknowledgement information (from the base station/network).

In addition, cross-CC beam reporting may be supported in at least one of the above optional procedures.

In this disclosure, step X.1 (where X is any of 1, 2, 3, and 5) in each option may be referred to as the first step. The first step may be a step in which the UE sends a request/notification regarding a beam report to the base station.

In this disclosure, step X.2 (where X is 1, 2, or 5) in each option may be referred to as the second step. The second step may be a step in which the UE receives DCI/instruction regarding beam reporting from the base station.

In this disclosure, step X.3 (where X is any of 1, 2, and 5 (or step 3.2/4a.1/4b.1)) in each option may be referred to as the third step. The second step may be a step in which the UE transmits a beam report to the base station.

Of the above options, options 1 to 3 are currently being considered for specification.

In particular, in Option 3, the cases where the base station response to the first step is supported and not supported are considered. In this case, the following modes are considered for UCI-based beam reporting:
・Mode 1: Option 2.
Mode 2: Option 3 with base station response.
Mode 2 (or 3): Option 3 with no base station response.

Note that the base station's response to the third step may or may not be supported in Options 2/3.

For the above options 1, 2, and 3, the combinations of signals/channels transmitted/received in the first to third steps are assumed to be the example shown in Figure 2. The example shown in Figure 2 describes the combinations of signals/channels in the first, second, and third steps, as well as the corresponding delays and UL resource overhead.

For example, the signal transmitted in the first step could be a scheduling request (SR, e.g., 1 bit) or a new type of UCI (e.g., multiple bits).

For example, the signal transmitted in the second step may be at least one of response information/DCI to the information transmitted in the first step and DCI that schedules the beam report in the third step.

For example, the channels that transmit the beam report sent in the third step may be a dynamic grant (DG) PUSCH, a configured grant (CG) PUSCH, and a PUCCH. Also, for example, the signals/information that transmit the beam report sent in the third step may be a MAC CE, UCI, and two-step/part UCI.

Note that any combination of signals/channels related to UEIBR described in this disclosure (for example, any combination shown in Figure 2) may be applied.

Options 2 and 3 above may be read as Modes A and B, respectively.

In UEIBR, it is being considered that specific events (e.g., at least event 2) will be supported for detecting trigger events for beam reporting.

For example, for a specific event (e.g., event 2), it may be supported that at least L1-RSRP is used as a quality indicator.

(Beam/UCI format/RS settings in UEIBR)
Also, in a particular event (e.g., event 2), the "current beam" may be determined/derived based on the QCL RS (e.g., QCL source RS) of the indicated TCI state, where at least one of SSB and CSI-RS may be supported.

For example, for the "current beam" in a particular event (e.g., event 2), at least one of the following beam options 2a to 2c may be supported:
Beam Option 2a: The RS corresponding to the current beam is [implicitly] derived/determined based on the QCL RS of the indicated TCI state.
Beam Option 2b: The RS corresponding to the current beam is the QCL RS and the QCLed SSB in the indicated TCI state.
Beam Option 2c: The RS corresponding to the current beam is [explicitly] configured/indicated using RRC signaling/MAC CE.

For example, for "New Beam" in Event 2, at least one of the following beam options 3a to 3c may be supported:
Beam Option 3a: The RS corresponding to the new beam is configured [explicitly] using RRC signaling (e.g., reconfiguration of existing RS measurements or configuration parameters of the TCI state (e.g., TCI-State))/MAC CE.
Beam Option 3b: The RS corresponding to the new beam is implicitly derived/determined based on the QCL RS of the TCI state to be activated (active TCI state).
Beam Option 3c: The RS corresponding to the new beam is implicitly derived/determined based on the QCL RS of one or more configured TCI states (configured TCI states).

Note that the beam option names in this disclosure are merely examples and are not limited to the examples in this disclosure.

(analysis)
It is envisioned that multiple schemes are supported for current beam/RS measurement for a given event (e.g., event 2).

<Scheme 1>
The RS of the current beam is the QCL RS in the indicated TCI state.

<Scheme 2>
The RS of the current beam is an SSB that is quasi-collocated (QCLed) with the QCL RS in the indicated TCI state.

If there are two QCL RSs in the indicated TCI state, the QCL RS may be QCL Type D.

At least one of CSI-RS and SSB may be supported as the QCL RS to be set/applied to the indicated TCI state. If CSI-RS is set/applied as the QCL RS, at least one of a tracking CSI-RS (TRS) and a measurement CSI-RS may be supported. The measurement CSI-RS may be a CSI-RS used for L1-RSRP/L1-SINR, or a CSI-RS used for beam management (BM).

In Scheme 1, it is also possible that only a TRS (e.g., one tracking CSI-RS) is set as the QCL-RS (e.g., Type A/D) for the indicated TCI state. In such cases, the question arises as to how to control the measurement/reporting of the current beam (e.g., how to determine the RS to be used for measuring/reporting the RS of the current beam).

If only a TRS is set as the QCL-RS for the indicated TCI state, it is possible to select a reference signal other than the TRS (e.g., an RS corresponding to the TRS) for measuring/reporting the RS of the current beam. In this case, the question arises as to how to determine the RS to be used for measuring/reporting the current beam.

In this way, the inventors focused on cases where only a TRS (or only one TRS) is set in the indicated TCI state, and considered methods for appropriately measuring and reporting the current beam even in such cases, leading to the concept of this embodiment.

Embodiments of the present disclosure will be described in detail below with reference to the drawings. The wireless communication methods according to the embodiments may be applied independently or in combination.

(Various reading changes)
In the present disclosure, a word enclosed in "( )" in a sentence may indicate an explanation of the word immediately preceding it (for example, an explanation of spelling), a paraphrase, a specific example, a supplementary explanation, etc. Also, in the present disclosure, a word enclosed in "[ ]" in a sentence may be interpreted including the word in the meaning of the entire sentence, or may be interpreted excluding the word in the meaning of the entire sentence (ignoring the word in the meaning of the entire sentence). Note that "( )" and "[ ]" may also be used for purposes/meanings other than those mentioned above.

In this disclosure, "A/B" and "at least one of A and B" may be interpreted interchangeably. Also, in this disclosure, "A/B/C" may mean "at least one of A, B, and C."

In this disclosure, terms such as notify, activate, deactivate, indicate (or indicate), select, configure, update, and determine may be read interchangeably. In this disclosure, terms such as support, control, controllable, operate, and operateable may be read interchangeably.

In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, upper layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In this disclosure, Medium Access Control control elements (MAC Control Elements (CEs)), update commands, activation/deactivation commands, etc. may be interchangeable.

In the present disclosure, higher layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., messages from the core network such as positioning protocol (e.g., NR Positioning Protocol A (NRPPa)/LTE Positioning Protocol (LPP)) messages), or a combination of these.

In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), etc.

In this disclosure, terms such as drop, abort, cancel, puncture, rate match, postpone, and do not transmit may be read interchangeably.

In this disclosure, terms such as index, identifier (ID), indicator, and resource ID may be interchangeable. In this disclosure, terms such as sequence, list, set, group, cluster, subset, and pool may be interchangeable.

In this disclosure, the terms panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmitting entity, Transmission/Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relation, SRS Resource Indicator (SRI), Control Resource Set (CORESET), Physical Downlink Shared Channel (PDSCH), Codeword (CW), Transport Block (TB), Reference Signal (RS), Antenna Port (e.g., Demodulation Reference Signal (DMRS) port), Antenna Port group (e.g., DMRS port group), group (e.g., spatial relationship group, Code Division Multiplexing (CDM) group, reference signal group, CORESET group, Physical Uplink Control Channel (PUCCH) group, PUCCH resource group), resource (e.g., reference signal resource, SRS resource), resource set (e.g., reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, Quasi-Co-Location (QCL), QCL assumption, etc. may be read interchangeably.

In this disclosure, the terms base station, gNB, and network (NW) may be interpreted interchangeably.

In the present disclosure, cell group, serving cell group, master cell group (MCG), and secondary cell group (SCG) may be interchangeable. L1/L2, L1/L2 signaling, and DCI/MAC CE may be interchangeable. A serving cell may be replaced with a cell that transmits a PDSCH. A candidate cell may refer to a cell that is a candidate to become a serving cell through L1/L2 inter-cell mobility. L1L2-triggered mobility (LTM) and L1/L2 inter-cell mobility may be interchangeable.

In the present disclosure, cell, PCI, serving cell, source serving cell, source cell, CC, BWP, BWP within CC, and band may be interchangeable. In the present disclosure, cell, PCI, cell with additional PCI, additional cell, other cell, non-serving cell, cell with a different PCI, candidate cell, candidate serving cell, cell with a PCI different from the PCI of the current serving cell, another serving cell, and target cell may be interchangeable. A target cell may be a cell selected from multiple candidate cells. In the present disclosure, switch, change, and update may be interchangeable. A serving cell may be interchangeable with the serving cell before the switch or the serving cell after the switch.

In the present disclosure, event-based beam reporting, event-triggered beam reporting, UE-triggered beam reporting, and UE-initiated beam reporting may be read interchangeably.

In this disclosure, event-triggered beam reporting may simply be referred to as beam reporting/CSI reporting/L1-RSRP/SINR beam reporting.

In this disclosure, the terms table, mapping, and association may be used interchangeably.

In the present disclosure, event-based beam reporting may be reported via PUSCH (e.g., configuration grant PUSCH, grant-based PUSCH). That is, the report content in the present disclosure may be transmitted using at least one of MAC CE/UCI/PUCCH/PUSCH.

In this disclosure, CSI report and report may be read interchangeably.

In the present disclosure, the terms report, reporting resource, and resource may be interchangeable. For example, the terms first resource and first report may be interchangeable, and the terms second resource and second report may be interchangeable.

In this disclosure, the number of beams and the number of resources may be interpreted interchangeably.

In this disclosure, "serving" may be interchangeably read as "serving beam/serving cell/SpCell."

In this disclosure, neighbor may be interpreted interchangeably as a beam/cell other than the serving beam/serving cell/SpCell/SCell.

In this disclosure, the pair of RS index and L1-RSRP/SINR may be referred to as an L1 measurement report. That is, the L1 measurement report may include the pair of RS index and L1-RSRP/SINR.

In this disclosure, candidate cell, target cell, neighboring cell, cell, etc. may be interpreted interchangeably.

In this disclosure, the terms "an event has occurred" and "the conditions for the event have been satisfied" may be interpreted interchangeably.

In this disclosure, the terms beam, RS, and [L1/L3] measurement result may be interpreted interchangeably.

In this disclosure, the RS being measured may be a QCL source RS in an active TCI state/indicated TCI state.

In this disclosure, the terms spatial domain filter, time domain filter, and domain filter may be interpreted interchangeably.

In this disclosure, NW/BS/gNB may be interpreted interchangeably.

In this disclosure, CSI reports and beam reports may be read interchangeably.

In this disclosure, [for Rel. 19] event-based beam reporting, event-triggered beam reporting, UE-triggered beam reporting, UE-initiated beam reporting (UEIBR), UE-initiated beam management (UEIBM), beam reporting, etc. may be read interchangeably.

In the present disclosure, the current beam/new beam may correspond to at least one of the indicated TCI state, the indicated TCI state, the active TCI state, the activated TCI state, the configured TCI state, the configured TCI state, and the RS configured in the RRC.

In the present disclosure, the terms indicated TCI state, active TCI state, activated TCI state, configured TCI state, configured TCI state, and RS configured in RRC may be interpreted interchangeably.

In the present disclosure, the number of current beams/new beams may be one or more.

In this disclosure, new beam/RS, candidate beam/RS, measurement beam/RS, measurement beam/RS, etc. may be read interchangeably.

In this disclosure, a new type of UCI (new UCI) may refer to UCI transmitted in multiple bits (and multiple steps/parts).

Each embodiment of the present disclosure can be applied to any event.

In this disclosure, L1-RSRP may be interchangeably read as L1-SINR.

In this disclosure, the terms "condition" and "threshold" may be interpreted interchangeably.

In this disclosure, the terms filtered value (measured value: L1-RSRP), filter value, and L1-RSRP filtered by network settings (NW-filtered L1-RSRP) may be used interchangeably.

In this disclosure, beam report, UEIBR, UEIBR report, and simply report may be read interchangeably.

In this disclosure, CC, carrier, cell, serving cell, frequency, frequency carrier, carrier frequency, etc. may be read interchangeably.

In this disclosure, UCI and MAC CE may be interpreted as interchangeable containers used in UEIBR.

In this disclosure, reporting a (current/measured) beam may mean reporting an RS index (e.g., CSI-RS resource indicator (CRI)/SSB resource indicator (SSBRI)) (corresponding to the (current/measured) beam) and measurement results (e.g., L1-RSRP/RSRQ/SINR). In this disclosure, information about a beam may mean an RS index/measurement result (corresponding to the beam).

In this disclosure, "current beam" may also mean "current beam of the current serving cell" in mobility.

In the present disclosure, the terms beam, RS, RS resource, RS resource set, RS index, RS indicator, RS ID, etc. may be interchangeable. In the present disclosure, the terms RS resource set, RS resource subset, RS subset, etc. may be interchangeable.

(Wireless communication method)
The UE may perform beam measurement/reporting (e.g., UE IBR) by applying the present disclosure. The NW/BS/gNB may provide/send to the UE settings/instructions, etc. for the UE to realize the control. Furthermore, the NW/BS/gNB may perform various controls necessary to receive the beam report/CSI report from the UE.

This disclosure is applicable to MIMO/mobility use cases.

In this disclosure, each embodiment/option may be applied alone or in combination with multiple options.

This disclosure may also be applied to the quantization of beam indices and measurement results (L1-RSRP values) per CSI reporting setting, per CC, or across multiple CSI reporting settings/CCs.

<Current Beam RS>
When only TRS (or one TRS) is set to the indicated TCI state, at least one of the following options may be supported for RS measurements of the current beam:

[Option 1]
The RS of the current beam may be a CSI-RS (e.g., beam management CSI-RS/measurement CSI-RS) derived/determined from the QCL RS in the designated TCI state. The RS of the current beam may be defined/set as an additional scheme (e.g., Scheme 3).

[Option 2]
The TRS configured in the indicated TCI state may be supported as a measurement RS for the current beam, in which case the TRS may be used to determine the L1-RSRP of the current beam.

[Option 3]
The RS of the current beam may be explicitly configured by the RRC/MAC CE, or may be defined/configured as an additional scheme (e.g., Scheme 3 (or Scheme 4)).

For example, if the tracking CSI-RS (TRS) set in the indicated TCI state is not suitable as the measurement RS for the current beam (e.g., if the measurement/BM CSI-RS is more suitable for measuring the current beam (e.g., determining the L1-RSRP)), Option 1/Option 3 may be applied.

Option 2 may be applied if the tracking CSI-RS (TRS) configured in the indicated TCI state can be applied as the measurement RS for the current beam.

<TRS and CSI-RS>
A case may also be supported in which multiple CSI-RSs are configured in resource setting (or CSI resource configuration), and the multiple CSI-RSs are associated with one root QCL source RS (e.g., SSB) corresponding to the RS of the current beam (or the TRS set to the indicated TCI state) (see Figure 3).

Figure 3 shows a case where only a TRS is set as the QCL RS for the indicated TCI state. For example, when a CSI-RS that is QCL with the SSB corresponding to that TRS is applied as the RS of the current beam, in the case where multiple CSI-RSs are QCL'd to one SSB, the UE needs to determine which CSI-RS is associated with the indicated TCI state. Note that when multiple TRSs (e.g., TRS#1 to TRS#3)/CSI-RSs (e.g., CSI-RS#1 to CSI-RS#3) are associated with one SSB, this may correspond to the case where the SSBs form a wide beam and the CSI-RSs form a narrow beam (see Figure 4).

It may also be possible to support a case where one or more CSI-RSs are configured in resource setting (or CSI resource configuration), and one CSI-RS is associated with one root QCL source RS (e.g., SSB) corresponding to the RS of the current beam (or the TRS set to the indicated TCI state) (see Figures 5A and 5B).

Figure 5A shows the case where only a TRS is set as the QCL RS for the indicated TCI state. For example, if a CSI-RS that is QCL with the SSB corresponding to that TRS is applied as the RS of the current beam, and one CSI-RS is QCLed to one SSB, the UE can easily determine which CSI-RS is associated with the indicated TCI state. Note that when one TRS (e.g., TRS#1)/CSI-RS (e.g., CSI-RS#1) is associated with one SSB, the SSB may form the same beamwidth as the CSI-RS (see Figure 5B).

In the following zeroth to fourth embodiments, a case where only a TRS is set as the QCL RS set to the indicated TCI state will be described as an example, but the cases to which this embodiment is applicable are not limited to these and may be applied to other cases. For example, it may be applied to a case where an RS different from the QCL RS set to the indicated TCI state is used to measure/report the RS of the current beam. Alternatively, it may be applied to a case where a CSI-RS of a specified QCL type is not set to the indicated TCI state. Alternatively, it may be applied to a case where the QCL RS set to the indicated TCI state is not included in the upper layer parameters (e.g., resource configuration) used to configure the RS of a new beam.

<Tenth embodiment>
[Relationship between number of RSs/number of TCI states/number of QCL RS types]
The numbers of the following components 1-1 to 1-4 may be the same among the components or may be set differently.
Component #1-1: RS set in resource setting
Component #1-2: TCI state configured by RRC (or TCI state included in the TCI state list)
Component #1-3: TCI state activated by MAC/CE Component #1-4: QCL type D (or type A/B/C) with different QCL information for TCI states that can be indicated TCI states

Resource setting may also be read as resource configuration or CSI resource configuration.

If the number of RSs (component #1-1) set in the resource setting cannot be set to the same number as at least one of the other components (components #1-2/#1-3/#1-4), the resource setting may be updated after a beam switch.

[RS Settings for Measurement/Reporting]
At least one of the following components #2-1 and #2-2 may be supported.

Component #2-1: The measured RS and the reported RS may be configured in the same RS configuration or in different RS configurations.

Component #2-2: The RS of the current beam and the RS of the new beam may be set in the same RS configuration or in different RS configurations.

In component #2-1, if the measured RS and the reported RS are set to different RSs, in component #2-2, the RS of the current beam and the RS of the new beam may be set to different RSs.

UE Operation
The UE may support at least one of measurement and reporting of RSs configured under/outside the CSI resource config for UE IBR.

For example, the RS configured under the TCI state config may be measured/reported to the UEIBR. If the RS of the current beam and the RS of the new beam are configured in different RS configurations, or if the RS of the current beam is not configured under the CSI resource configuration, the UE may be supported to report the RS of the current beam in the same way as (or together with) the RS of the new beam. A case in which the RS of the current beam is not configured under the CSI resource configuration may be, for example, when it is configured with higher layer parameters (e.g., other CSI-RS configuration/TCI state configuration) that are different from the CSI-RS configuration for the UEIBR (or the CSI-RS configuration in which the new beam is configured).

If the RS of the current beam and the RS of the new beam are set to different RS configurations and the RS of the current beam is not set under the CSI resource configuration, and if it is supported for the UE to report the current beam, the index of the RS of the current beam/RS of the new beam may be set based on specified conditions (see the third embodiment).

The 0th embodiment may be applied in combination with at least one of the first to third embodiments.

First Embodiment
The first embodiment relates to an example of a method for determining a reference signal of a current beam used for measurement/reporting.

The UE may determine the RS of the current beam on which to perform measurements based on at least one of the QCL RS set in the indicated TCI state, the indicated TCI state, and the root QCL source RS.

The base station may transmit at least one of information regarding the QCL RS to be set to the indicated TCI state, information regarding the indicated TCI state and the root QCL source RS (e.g., SSB) to the UE using at least one (or a combination of two or more) of higher layer parameters regarding the TCI state (TCI-state), MAC CE, and DCI. The higher layer parameters regarding the TCI state (TCI-state) may include TCI state ID/QCL-Info (reference signal/qcl type, etc.).

The UE may determine the RS of the current beam to measure/report based on at least one of the following options 1-1 to 1-4.

[Option 1-1]
The RS of the current beam to be measured may be derived from the QCL RS (type A/B/C/D) set to the indicated TCI state. For example, when the RS of the current beam is derived from the QCL RS set to the indicated TCI state, only one RS configured in one CSI-Resource config/CSI-Resources set/MAC CE may be quasi-colocated (QCL) with the indicated TCI state (or one root QCL source RS derived by the indicated TCI state).

The root QCL source RS may be an SSB. The SSB may be configured by higher layer parameters/MAC CE, may be defined in the specification, or may be an SSB selected by a predetermined process (e.g., a random access procedure).

The UE may assume that only one RS configured in one CSI resource configuration/CSI resource set/MAC CE is QCL'd with one root QCL source RS (e.g., SSB) derived by the indicated TCI state. In this case, the UE may select one CSI-RS to be measured configured in the CSI resource configuration/CSI resource set/MAC CE based on the QCL RS (type A/B/C/D) configured in the indicated TCI state (or by tracking from the QCL RS). This CSI-RS corresponds to the CSI-RS for beam management/measurement.

Figure 6 shows an example of a method for determining the current beam RS in Option 1-1. Figure 6 shows a case where one or more CSI-RSs (here, CSI-RS#1 to CSI-RS#3) are configured in the resource setting (or CSI resource setting), and one or more TRSs (here, TRS#1 to TRS#3) correspond to the root QCL source RS (here, SSB#1). SSB#1 and one or more TRSs (here, TRS#1 to TRS#3) may be a Type D QCL.

In option 1-1, only one RS (here, CSI-RS#2) configured in resource setting (or CSI resource setting) is mapped to one root QCL source RS (here, SSB#1). In other words, there is a one-to-one mapping between SSB#1 derived from the indicated TCI state and CSI-RS#2.

If TRS#1 (Type A/D) is set in the QCL-Info included in the indicated TCI state, the UE may derive SSB#1 based on TRS#1 and select CSI-RS#2 that is QCL-linked with SSB#1. The UE may control the measurement/reporting of the current beam using the selected CSI-RS#2.

The number of RSs set in resource setting (or CSI resource setting) may be the same as or less than the number of SSBs of the QCL RS of the TCI state set in the TCI state list. If the number of RSs set in resource setting (or CSI resource setting) is less than the number of SSBs, the resource setting (or CSI resource setting) may be updated by the MAC CE, etc. after beam switching.

In option 1-1, the RS of the current beam (or current serving cell) and the RS of the new beam (or candidate cell) may be configured using one CSI resource configuration/CSI resource set. In other words, a common CSI resource configuration/CSI resource set may include the RS of the current beam (or current serving cell) and the RS of the new beam (or candidate cell). Alternatively, the RS of the current beam (or current serving cell) and the RS of the new beam (or candidate cell) may be configured using separate CSI resource configurations/CSI resource sets. In other words, the RS of the current beam (or current serving cell) and the RS of the new beam (or candidate cell) may be included in different CSI resource configurations/CSI resource sets.

Whether the RS of the current beam (or current serving cell) and the RS of the new beam (or candidate cell) are configured with a common CSI resource configuration/CSI resource set or are configured with a common CSI resource configuration/CSI resource set may be switched depending on the configured event or may be configured by RRC.

As shown in Option 1-1, by associating/mapping only one CSI-RS with one QCL source RS (e.g., SSB) corresponding to the indicated TCI state, the UE can appropriately determine the RS of the current beam to measure using the QCL RS set to the indicated TCI state.

[Option 1-2]
The RS of the current beam to be measured may be determined based on the QCL RS (TRS) set in the designated TCI state and the QCL type of the TRS. For example, when the RS of the current beam is derived from the QCL RS set in the designated TCI state, the same CSI-RS (e.g., a CSI-RS for beam measurement) as the TRS for which QCL information other than Type-D is set in the designated TCI state may be selected.

The UE may select the same CSI-RS as the TRS for which QCL information other than Type D is set in the indicated TCI state as the RS for beam management/measurement (e.g., the RS of the current beam).

Figure 7 shows an example of a method for determining the current beam RS in Option 1-2. Figure 7 shows a case where one or more CSI-RSs (here, CSI-RS#1 to CSI-RS#3) are configured in the resource setting (or CSI resource setting), and one or more TRSs (here, TRS#1 to TRS#3) correspond to the root QCL source RS (here, SSB#1). SSB#1 and one or more TRSs (here, TRS#1 to TRS#3) may be a Type D QCL. Also, one or more CSI-RSs (here, CSI-RS#1 to CSI-RS#3) may be QCLs (e.g., Type D) for the root QCL source RS (here, SSB#1).

In option 1-2, a CSI-RS (e.g., a CSI-RS with Type A set (here, CSI-RS #3)) that is the same as a TRS with QCL information other than Type D set in the instruction TCI information (here, TRS #1 with Type A set) may be selected.

If TRS#1 (Type A/D) is configured in the QCL-Info included in the indicated TCI state, the UE may select CSI-RS#3 (e.g., CSI-RS#3 having Type A) based on TRS#1 configured with Type A. The UE may control the use of the selected CSI-RS#3 to measure/report the current beam.

If there are multiple CSI-RSs with the same type (e.g., Type A) as the TRS for which QCL information other than Type D is set in the instruction TCI information, one CSI-RS may be selected based on a predetermined condition (e.g., the index of the CSI-RS/CSI-RS set (minimum index/maximum index)).

When multiple CSI-RSs (e.g., multiple CSI-RSs for beam management/measurement) are QCL'd with one SSB (e.g., Type D), each CSI-RS may have different QCL information for at least one of Types A/B/C.

The number of RSs set in resource setting (or CSI resource setting) may be the same as or less than the number of SSBs of the QCL RS of the TCI state set in the TCI state list. If the number of RSs set in resource setting (or CSI resource setting) is less than the number of SSBs, the resource setting (or CSI resource setting) may be updated by the MAC CE, etc. after beam switching.

As shown in Option 1-2, by selecting a CSI-RS based on the QCL type of the QCL/RS (or TRS) set in the indicated TCI state, the RS of the current beam to be measured can be appropriately determined even when multiple CSI-RSs are associated with the SSB.

[Options 1-3]
The RS of the current beam to be measured may be determined based on the indicated TCI state (e.g., a TCI state ID). The UE may derive the RS of the current beam from the TCI state ID of the indicated TCI state.

The association between the TCI state ID and the CSI resource configuration (CSI-Resource config) / CSI resource set (CSI-Resource set) / non-zero power CSI resource (nzp-CSI-Resource) may be defined in the specification or configured by RRC.

Figures 8A and 8B show an example of a method for determining the current beam RS in Options 1-3. Figure 8A shows a case where one or more CSI-RSs (here, CSI-RS#1 to CSI-RS#3) are configured in the resource setting (or CSI resource configuration), and each CSI-RS is associated with a TCI state ID. In other words, the CSI resource configuration/CSI resource set/non-zero power CSI resource may be configured outside the TCI state config.

Figure 8A shows a case where TCI state ID #1 is associated with CSI-RS #1, TCI state ID #2 is associated with CSI-RS #2, and TCI state ID #3 is associated with CSI-RS #3. When the ID of the indicated TCI state (indicated TCI state) is #1, the UE may select a specific CSI-RS included in the CSI resource setting (or CSI resource configuration) based on TCI state ID #1 (see Figure 8A). The UE may control the use of the selected CSI-RS #1 to measure/report the current beam.

Alternatively, the indicated TCI state (e.g., TCI state configuration) may include information about the CSI-RS (e.g., the CSI-RS included in the resource setting (or CSI resource configuration)) (see Figure 8B). In other words, non-zero power CSI resources/CSI-SSB resources (CSI-SSB-Resource) may be configured under the TCI state configuration.

Figure 8B shows a case where a CSI-RS (here, CSI-RS #3) included in the resource setting (or CSI resource setting) is set to the TCI state setting/instructed TCI state. The UE may select a specific CSI-RS (here, CSI-RS #3) corresponding to the instructed TCI state (instructed TCI state) and may control the UE to use the selected CSI-RS #3 to measure/report the current beam.

The referenced CSI resource configuration (CSI-Resource config)/CSI resource set (CSI-Resource set) may be the one configured for the current beam or the same one for the new beam.

The number of RSs configured in the resource setting (or CSI resource setting) may be controlled to be less than the number of TRSs as QCL RSs (types A/B/C/D) configured under the TCI state configuration (or may be equal to or less than the number of TRSs). For example, the base station may configure the number of RSs configured in the resource setting (or CSI resource setting) to be less than the number of TRSs as QCL RSs (types A/B/C/D) configured under the TCI state configuration.

If the number of RSs is less than (or equal to or less than) the number of TRSs as QCL RSs (Type A/B/C/D) set under the TCI state config, at least one of the following options 1-3-1 to 1-3-2 may be applied.

Option 1-3-1
The CSI resource configuration/CSI resource set/non-zero-power CSI resource may be configured outside the TCI state configuration (see FIG. 8A). In this case, an association between a TCI state ID that can be configured for the indicated TCI state and a CSI-RS included in the resource configuration may be defined/configured. The UE may control measurement/reporting of the current beam using the CSI-RS (or the CSI resource configuration/CSI resource set) associated with the TCI state ID of the indicated TCI state.

<<Option 1-3-2>>
Non-zero power CSI resources/CSI-SSB resources (CSI-SSB-Resources) may be configured under the TCI state configuration (see FIG. 8B). The UE may control measurement/reporting of the current beam using the CSI-RS (or CSI resource configuration/CSI resource set) included in the indicated TCI state. In this case, the number of CSI-RSs included in the indicated TCI state may be a predetermined number (e.g., 1) or less.

Option 1-3-1 and option 1-3-2 may be switched depending on the event that is set, or which option is applied may be set by a higher layer parameter.

As shown in Option 1-3, by selecting a CSI-RS based on the TCI state ID of the indicated TCI state, the RS to be used for measuring/reporting the current beam can be appropriately determined even when only the TRS is set in the indicated TCI state.

[Options 1-4]
The TRS may be configured in association with the CSI-RS of the CSI resource configuration/CSI resource set. Options 1-4 may be applied when a predetermined case (e.g., UE IBR) is configured.

The UE may assume that the TRS (e.g., the QCL RS configured in the indicated TCI state) is configured in association with the CSI-RS configured in the CSI resource configuration/CSI resource set. In this case, the UE may select the CSI-RS associated with the TRS included in the indicated TCI state as the RS for the current beam.

At least one of the following options 1-4-1 to 1-4-3 may be applied to associate the TRS and CSI-RS. The CSI-RS may be a CSI-RS included in the CSI resource configuration/CSI resource set/TCI state.

<<Option 1-4-1>>
Association information between TRS and CSI-RS may be configured by RRC.

For example, a local or global CSI-RS index may be configured under configuration for the TRS/TCI state (see Figure 9A).

FIG. 9A shows a case where one or more CSI-RSs are configured in resource setting (or CSI resource setting), and the CSI-RSs included in the resource setting are associated with the TRSs (or TCI state IDs). The base station may configure the UE with TRS settings/TCI state settings that include information regarding the association between the TRSs/TCI state IDs and the CSI-RSs.

If TRS#1 (Type A/D) is set in the QCL-Info included in the indicated TCI state, the UE may select CSI-RS#3 associated with the ID of TRS#1/indicated TC state and control it to measure/report the current beam.

Local or global TRS index/TCI state ID may be configured under configuration for CSI-RS (see Figure 9B).

FIG. 9B shows a case where one or more CSI-RSs are configured in resource setting (or CSI resource setting), and a TRS (or TCI state ID) is associated with each CSI-RS. The base station may configure the UE with resource setting (or CSI resource configuration) that includes information regarding the association between the TRS/TCI state ID and the CSI-RS.

If TRS#1 (Type A/D) is set in the QCL-Info included in the indicated TCI state, the UE may select CSI-RS#3 associated with the ID of TRS#1/indicated TC state and control it to measure/report the current beam.

In this disclosure, a global index may refer to an ID commonly used in a network (NW). A local index may refer to an ID obtained by re-indexing a global index for a specific purpose. For example, if three SSBs with global indexes (e.g., SSB34, SSB12, SSB2) are set in a list in order as reporting RSs, the SSBs may be treated as SSB1, SSB2, and SSB3 in local indexes, and reporting may be controlled using indexes 1/2/3.

<<Option 1-4-2>>
Association information between the TRS and the CSI-RS may be set by the MAC CE.

The MAC CE may be used to update/activate RSs (e.g., CSI-RSs) configured in resource setting (or CSI resource configuration).

Local or global TRS index/TCI state ID may be indicated for each RS index (e.g., CSI-RS ID).

The UE may select a specific CSI-RS from the TRS/TCI state ID included in the specified TCI state based on the association information between the CSI-RS and the TRS/TCI state ID indicated by the MAC CE, and perform control to measure/report the current beam.

Option 1-4-1/Option 1-4-2 may be applied when the number of RSs configured in resource setting (or CSI resource setting) is less than the number of TRSs as QCL RSs (types A/B/C/D) configured in TCI state setting. Otherwise, Option 1-4-3 below may be applied.

<<Option 1-4-3>>
Association information between TRS and CSI-RS may be configured by RRC.

For example, the same index may be associated with the CSI-RS and TRS/TCI states (see Figure 10A). The UE may expect/assume that the same index is associated with the CSI-RS and TRS/TCI states.

Figure 10A shows a case where one or more CSI-RSs are configured in resource setting (or CSI resource configuration), and one or more TRSs are configured in the indicated TCI state.

If TRS#1 (Type A/D) is set in the QCL-Info included in the indicated TCI state, the UE may select CSI-RS#1 with the same ID as TRS#1 (or the indicated TCI state ID) and control it to measure/report the current beam.

Association/mapping between CSI-RS and TRS/TCI states may be configured/defined (see Figure 10B).

Figure 10B shows an example of the association between CSI-RS and TRS/TCI states.

If TRS#1 (Type A/D) is configured in the QCL-Info included in the indicated TCI state, the UE may select CSI-RS#3 associated with TRS#1 (or the indicated TCI state ID) and control it to measure/report the current beam.

Options 1-4 may be applied in combination with other options (e.g., options 1-3).

As shown in Option 1-4, by associating a specific CSI-RS (or CSI resource configuration/CSI resource set) with the QCL RS (or TRS) set in the indicated TCI state, the CSI-RS can be selected based on the QCL RS (e.g., TRS) of the indicated TCI state. This allows the RS to be used for measuring/reporting the current beam to be appropriately determined even when only the TRS is set in the indicated TCI state.

Second Embodiment
The second embodiment relates to an example of measurement control/report control when one or more (or multiple) schemes are supported for measurement/reporting of a current beam.

The scheme applied to measurement/reporting of the current beam may be determined based on at least one of the RS type of the new beam, the QCL RS/measurement RS corresponding to the indicated TCI state, and RRC parameters.

As one or more schemes, at least one of the following schemes 1 to 3 (or a combination of any two or three) may be supported.

Scheme 1: The RS of the current beam is the QCL RS included in the designated TCI state. Scheme 2: The RS of the current beam is the QCL RS of the designated TC state and the SSB that becomes the QCL. Scheme 3: The RS of the current beam is the RS determined using the first embodiment.

If the RS of the current beam to be measured is derived using the QCL RS (Type A/B/C/D) set in the designated TCI state (e.g., Option 1-1/1-2/1-4), the scheme to be applied may be determined based on at least one of Options 2-1 to 2-5. In other cases (e.g., Option 1-3), at least one of Options 2-6 to 2-8 may be applied.

[Option 2-1]
Scheme 1 may be applied when the CSI-RS is configured as the RS of a new beam and the CSI-RS for beam management/measurement is configured as the QCL RS in the indicated TCI state.

Scheme 2 may also be applied when SSB is configured as the RS for a new beam.

Scheme 3 may also be applied when the CSI-RS is configured as the RS of a new beam and only the TRS is configured as the QCL RS in the indicated TCI state.

[Option 2-2]
Scheme 1 may be applied when CSI-RS is configured as the RS of a new beam and scheme 1 is configured by RRC.

Scheme 2 may also be applied when SSB is configured as the RS for a new beam.

Scheme 3 may be applied when CSI-RS is configured as the RS of a new beam and Scheme 3 is configured by RRC.

[Option 2-3]
Scheme 1 may be applied when scheme 1 is configured by RRC.

Scheme 2 may be applied when Scheme 2 is configured by RRC.

Scheme 3 may be applied when Scheme 3 is configured by RRC.

At least one of Option 2-1 to Option 2-3 may be applied when an additional scheme (e.g., Scheme 3) is supported in addition to Scheme 1/Scheme 2. By applying one of Option 2-1 to Option 2-3, it is possible to appropriately determine the scheme to be used for measuring/reporting RS of the current beam.

In other cases (e.g., when an additional scheme (Scheme 3) is not supported, or when only TRS is not set in the indicated TCI state (or when CSI-RS is set in the indicated TCI state)), at least one of the following options Option 2-4 to Option 2-5 may be applied.

[Option 2-4]
Scheme 1 may also be applied when CSI-RS is configured as the RS of a new beam.

Scheme 2 may also be applied when SSB is configured as the RS of a new beam.

[Option 2-5]
Scheme 1 may be applied when scheme 1 is configured by RRC.

Scheme 2 may be applied when Scheme 2 is configured by RRC.

If options 1-3 of the first embodiment are applied/supported, the determination of the RS for the current beam may be controlled based on the number of RS types (CSI-RS/SSB) set in the reference signal (or resource setting/CSI resource setting) associated with the TCI state ID of the indicated TCI state.

[Option 2-6]
If there is one RS type of CSI resource configuration associated with the TCI state ID of the indicated TCI state (see Fig. 11A), options 1-3 of the first embodiment may always be applied, and in this case scheme 1/2 may not be configured/supported.

FIG. 11A shows a case where there is one RS type in the CSI resource configuration associated with the TCI state ID of the indicated TCI state (e.g., the RS type is CSI-RS). In this case, the UE may select the CSI-RS (here, CSI-RS #3) associated with the TCI state ID of the indicated TCI state as the RS for the current beam and measure/report the current beam.

[Option 2-7]
If the number of RS types in the CSI resource configuration associated with the TCI state ID of the indicated TCI state is more than one (see FIG. 11B), the same RS type as that of the new beam may be selected. For example, the UE selects a reference signal corresponding to the same RS type as that of the new beam.

Figure 11B shows a case where there are two RS types in the CSI resource configuration associated with the TCI state ID of the indicated TCI state (e.g., RS types SSB and CSI-RS). In this case, the UE may select the same RS type as the new beam as the RS for the current beam and measure/report the current beam.

For example, if the RS type of the new beam is SSB, the UE may select SSB#1 as the RS of the current beam and measure/report the current beam. Also, if the RS type of the new beam is CSI-RS, the UE may select CSI-RS#3 as the RS of the current beam and measure/report the current beam.

[Option 2-8]
If there are more than one RS type of the CSI resource configuration associated with the TCI state ID of the indicated TCI state (see FIG. 11B), the RS type may be configured (or switched) by an RRC parameter.

Figure 11B shows a case where there are two RS types for the CSI resource configuration associated with the TCI state ID of the indicated TCI state (e.g., SSB and CSI-RS RS types). In this case, the UE may select the RS type set by the RRC parameters as the RS for the current beam and perform measurements/reports on the current beam.

For example, if an SSB is configured by the RRC parameters, the UE may select SSB#1 as the RS of the current beam and measure/report the current beam. Also, if a CSI-RS is configured by the RRC parameters, the UE may select CSI-RS#3 as the RS of the current beam and measure/report the current beam.

By applying one of Option 2-6 to Option 2-8, it is possible to appropriately determine the RS to be used for measuring/reporting the RS of the current beam.

At least one of options 2-6 to 2-8 may be applied when options 1-4 of the first embodiment are applied/supported.

[UE capability information]
In the above options, a UE capability regarding whether to support TRS for L1 beam measurement/reporting may be introduced. If the UE supports this capability (and the RRC sets a parameter to enable this capability), Scheme 1 may be applied. Otherwise, a scheme may be selected based on other conditions.

Third Embodiment
The third embodiment relates to an example of an RS index used to report a current beam.

If the RS of the current beam to be measured/reported is configured with parameters (e.g., other RS configuration) that are different from the RS configuration configured for the RS of the new beam, the UE may measure and report the RS of the current beam.

For example, if the RS of a new beam is configured in the CSI resource configuration for UEIBR and the RS of the current beam is configured outside the CSI resource configuration (outside CSI resource config for UEIBR), the UE may support measurement/reporting of the RS configured outside the CSI resource configuration. Note that the third embodiment may be applied when the UE has the ability to measure/report an RS configured outside the CSI resource configuration for UEIBR.

The UE may control reporting of the current beam based on at least one of the following options 3-1 to 3-4.

[Option 3-1]
In reporting the RS of the current beam, a certain index may be applied to the RS of the current beam. The UE may report the RS of the current beam with the certain index.

For example, the RS index of the current beam may always be a specific value (e.g., 0). In this case, the RS index of the new beam may be numbered starting from 1. For example, the first RS index of the new beam may be 1.

The specified index applied to the RS of the current beam may be defined in the specifications or set by an RRC parameter.

Figure 12A shows an example of reporting control of RS for a current beam in option 3-1. Here, for RS reporting of a current beam, the RS for the current beam being reported is assigned index 0 (e.g., local index 0). On the other hand, the example shows a case where index 1 or later (here, indexes 1 to 3) is assigned to the RS for a new beam being reported.

The RS for the new beam may be selected from the CSI-RS configured in the resource setting (or CSI resource setting) for the new beam. The RS for the current beam may be selected from the RS configured outside the resource setting (or CSI resource setting) for the new beam.

[Option 3-2]
In reporting the RS of the current beam, a certain position may be applied to the RS of the current beam. The UE may report the RS of the current beam that is mapped to the certain position.

For example, the RS index and measurement result of the current beam may be mapped to a specific position (e.g., the beginning). In this case, the RS index of the new beam may be mapped from the position after the RS of the current beam.

The predetermined position applied to the RS of the current beam may be defined in the specifications or set by an RRC parameter.

Figure 12B shows an example of reporting control of RS for the current beam in Option 3-2. Here, for RS reporting for the current beam, the RS index and measurement results (e.g., L1-RSRP) of the reported current beam are mapped first. On the other hand, the RS index and measurement results of the reported new beam are mapped second or later.

[Option 3-3]
In the RS report of the current beam/new beam, an identifier indicating the type of beam/RS (e.g., current beam or new beam) may be reported. In the RS report of the current beam, an identifier indicating the current beam may also be reported. In this case, an identifier indicating the new beam may also be reported for the RS report of the new beam.

When a UE reports the RS index of the current beam and measurement results (e.g., L1-RSRP for the RS of the current beam), it may also report an identifier indicating the current beam (e.g., 1) (see Figure 13A). Furthermore, when a UE reports the RS index of a new beam and measurement results (e.g., L1-RSRP for the RS of the new beam), it may also report an identifier indicating newness (e.g., 0).

[Option 3-4]
In the RS report of the current beam/new beam, the global index may be reported. The UE may perform the RS report of the current beam/the RS report of the new beam using the global index corresponding to the RS of the current beam and the global index corresponding to the RS of the new beam (see FIG. 13B).

In this case, the re-indexed index (e.g., local index) can be configured not to be reported in the RS report for the current beam/new beam.

By using at least one of options 3-1 to 3-4, the UE can properly measure and report the RS of the current beam even if the RS of the current beam is configured with parameters (e.g., other RS configuration) that differ from the RS configuration configured for the RS of the new beam.

<Additional Information>
<<Notification of information to UE>>
In the above-described embodiments, any information may be notified to the UE [from a network (NW) (e.g., a base station (BS)] (in other words, the UE receives any information from the BS) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal/channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

If the above notification is made by a MAC CE, the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader that is not specified in existing standards.

If the notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble the Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

Furthermore, notification of any information to the UE in the above-described embodiments may be performed periodically, semi-persistently, or aperiodically.

<<Notification of information from UE>>
In the above-described embodiments, notification of any information from the UE [to the NW] (in other words, transmission/reporting of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals/channels (e.g., PUCCH, PUSCH, PRACH, reference signals), or a combination thereof.

If the above notification is made by a MAC CE, the MAC CE may be identified by including a new LCID in the MAC subheader that is not specified in existing standards.

If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

Furthermore, any information notification from the UE in the above-described embodiments may be performed periodically, semi-persistently, or aperiodically.

<<Application of each embodiment>>
In a UE/BS, the specific process/operation/control/assumption/information(s) of at least one of the above-described embodiments may be applied (used) when one or more of the following conditions are met:
- Upper layer parameters indicating the above specific processing/operation/control/assumption/information are set.
The specific processing/actions/controls/assumptions/information are determined based on relevant higher layer parameters.
- The above specific processes/actions/controls/assumptions/information are specified/activated/triggered by MAC CE/DCI/UCI/resources/channels/RS.
Reporting or supporting specific UE capabilities indicating (or relating to) the above specific processes/actions/controls/assumptions/information.
The application of the specific process/action/control/assumption/information is determined based on specific conditions.

The specific UE capabilities may indicate at least one of the following:
Supporting specific processing/actions/control/information for at least one of the above embodiments.
Support event-triggered beam reporting.
Support setting of TRS (or TRS only) in the indicated TCI state.
Support MIMO/mobility for Rel. 19 and later.
Support reporting of RSs that are not under CSI resource configuration.

Furthermore, the above-mentioned specific UE capabilities may be capabilities that are applied across all frequencies (commonly regardless of frequency), capabilities for each frequency (e.g., one or a combination of cell, band, band combination, BWP, component carrier, etc.), capabilities for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC)).

Furthermore, the above-mentioned specific UE capabilities may be capabilities that apply across all duplexing methods (commonly regardless of the duplexing method), or may be capabilities for each duplexing method (e.g., Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

If the above conditions are not met, the UE/BS may follow the behavior specified in existing 3GPP releases.

(Additional Note)
The following inventions are added regarding one embodiment of the present disclosure.
[Appendix 1-1]
a receiver for receiving information regarding a quasi-co-location reference signal (QCL RS) that is set to an indicated transmit configuration indicator (TCI) state;
A terminal having a control unit that controls at least one of measurement and reporting of a reference signal of a current beam using a reference signal different from a tracking channel state information reference signal (TRS) when only the TRS is set as the QCL RS.
[Appendix 1-2]
The terminal according to Supplementary Note 1-1, wherein the control unit selects one channel state information reference signal that is mapped to a synchronization signal block corresponding to the indicated TCI state as a reference signal different from the TRS.
[Appendix 1-3]
The terminal according to Supplementary Note 1-1 or Supplementary Note 1-2, wherein the control unit selects a channel state information reference signal associated with the TRS as a reference signal different from the TRS.
[Appendix 1-4]
The terminal according to any one of Supplementary Note 1-1 to Supplementary Note 1-3, wherein the control unit selects a channel state information reference signal associated with a TCI state index of the indicated TCI state as a reference signal different from the TRS.

[Appendix 2-1]
a control unit for controlling measurement of a reference signal corresponding to the current beam and a reference signal corresponding to the new beam;
a transmitter that transmits at least one of a measurement result of a reference signal corresponding to the current beam and a measurement result of a reference signal corresponding to the new beam;
The control unit determines a scheme to be used for measuring the reference signal corresponding to the current beam based on at least one of the type of the reference signal of the new beam, a quasi-co-location reference signal (QCL RS) or a measurement reference signal corresponding to a transmission configuration indicator (TCI) state indicated for the current beam, and upper layer parameters when multiple schemes that can be used for measuring the reference signal corresponding to the current beam are supported.
[Appendix 2-2]
The terminal according to Supplementary Note 2-1, wherein the number of available schemes differs depending on whether only a tracking channel state information reference signal (TRS) is set as the QCL RS corresponding to the indicated TCI state.
[Appendix 2-3]
When a channel state information reference signal is set as the reference signal of the new beam and only a tracking channel state information reference signal (TRS) is set as the QCL RS corresponding to the indicated TCI state, the control unit uses a reference signal derived from the QCL RS as the current beam reference signal. A terminal described in Supplementary Note 2-1 or Supplementary Note 2-2.
[Appendix 2-4]
A terminal described in any of Supplementary Notes 2-1 to 2-3, in which, when the reference signal of the current beam is set to a reference signal setting different from the reference signal setting of the reference signal of the new beam, the control unit reports the measurement results of the reference signal of the current beam using at least one of a specific index and a specific position for the current beam reference signal.

(wireless communication system)
The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.

FIG. 14 is a diagram showing an example of the schematic configuration of a wireless communication system according to one embodiment. Wireless communication system 1 (which may simply be referred to as system 1) may be a system that achieves communication using Long Term Evolution (LTE) specified by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.

The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may 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.

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.

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

The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form a small cell C2 that is smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The location, number, shape, size, etc. of each cell and user terminal 20 are not limited to the configuration shown in the figure. Hereinafter, when base stations 11 and 12 are not to be distinguished, they will be collectively referred to as base station 10.

The wireless communication system 1 may also utilize multi-input multi-output (MIMO). For example, one cell may be formed by one antenna/base station 10, or by multiple antennas/base stations 10. One [virtual] cell (which may be called, for example, a supercell) may be made up of multiple [virtual] cells (which may be called, for example, subcells). A supercell may correspond to a cell with a fixed physical range, and a subcell may correspond to a cell with a quasi-static/dynamically changing physical range. In this case, the wireless communication system 1 may be called a cell-free system.

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

Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). Macrocell C1 may be included in FR1, and small cell C2 may be included in FR2. For example, FR1 may be a frequency band below 6 GHz (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

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

Multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), X2/Xn interface, etc.) or wirelessly (e.g., NR communication). For example, if NR communication is used as a backhaul between base stations 11 and 12, base station 11, which corresponds to the upper station, may be called an Integrated Access Backhaul (IAB) donor, and base station 12, which corresponds to the relay station (relay), may be called an IAB node.

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

The core network 30 may include network functions (Network Functions (NF)) such as, for example, a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). Note that multiple functions may be provided by a single network node. Communication with an external network (e.g., the Internet) may also be performed via the DN.

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

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

The radio access method may also be called a waveform. Note that in the wireless communication system 1, other radio access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) may be used as the UL and DL radio access methods.

In the wireless communication system 1, the downlink channel may be a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), or the like.

Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

User data, upper layer control information, System Information Block (SIB), etc. are transmitted via PDSCH. User data, upper layer control information, etc. may also be transmitted via PUSCH. Furthermore, Master Information Block (MIB) may also be transmitted via PBCH.

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

Note that the DCI that schedules the PDSCH may be referred to as a DL assignment or DL DCI, and the DCI that schedules the PUSCH may be referred to as a UL grant or UL DCI. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to the resources to search for DCI. The search space corresponds to the search area and search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that in this disclosure, "search space," "search space set," "search space setting," "search space set setting," "CORESET," "CORESET setting," etc. may be read interchangeably.

The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

Note that in this disclosure, downlink, uplink, etc. may be expressed without adding the word "link." Also, various channels may be expressed without adding "Physical" to the beginning.

In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for the PBCH) may be referred to as an SS/PBCH block, an SS block (SSB), etc. Note that SS, SSB, etc. may also be referred to as a reference signal.

Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). DMRS may also be called a user equipment-specific reference signal (UE-specific Reference Signal).

(base station)
15 is a diagram illustrating an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

Note that this example mainly shows the functional blocks that characterize the present embodiment, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, etc., as described based on common understanding in the technical field to which this disclosure pertains.

The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurements, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120. The control unit 110 may also perform call processing of communication channels (setting up, releasing, etc.), status management of the base station 10, management of radio resources, etc.

The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field to which this disclosure relates.

The transceiver unit 120 may be configured as an integrated transceiver unit, or may be composed of a transmitter unit and a receiver unit. The transmitter unit may be composed of a transmission processing unit 1211 and an RF unit 122. The receiver unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

The transmitting and receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

The transceiver unit 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

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

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

The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.

The transceiver unit 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may 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 may be output to the control unit 110.

The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes providing NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

Note that the transmitter and receiver of the base station 10 in this disclosure may be configured by at least one of the transmitter/receiver 120, the transmitter/receiver antenna 130, and the transmission path interface 140.

The base station 10 may be separated into three elements: a radio unit (RU), a distributed unit (DU), and a central unit (CU). For example, the RU may perform RF processing (digital beamforming, digital-to-analog conversion, analog beamforming, etc.) and lower-level physical layer functions (precoding, IFFT, FFT, etc.). The DU may perform higher-level physical layer functions (encoding to resource element mapping, etc.), MAC layer functions, and RLC layer functions. The CU may perform PDCP layer, Service Data Adaptation Protocol (SDAP) layer, and RRC layer functions.

In the present disclosure, the base station 10 may include a single device that implements all of the functions of the RU, DU, and CU, or may include multiple devices that each implement some of the functions of the RU, DU, and CU and are connected to each other. In the present disclosure, the base station 10 may be interchangeably referred to as the RU/DU/CU.

The transceiver unit 120 may transmit information regarding the quasi-co-location reference signal (QCL RS) to be set in the indicated transmission configuration indicator (TCI) state. When the control unit 110 sets only the tracking channel state information reference signal (TRS) as the QCL RS, it may also instruct information regarding a reference signal different from the TRS to be used for at least one of measuring and reporting the reference signal of the current beam.

The transceiver unit 120 may receive at least one of the measurement results of the reference signal corresponding to the current beam and the measurement results of the reference signal corresponding to the new beam. If multiple schemes that can be used to measure the reference signal corresponding to the current beam are supported, the control unit 110 may instruct the scheme to be used to measure the reference signal corresponding to the current beam using at least one of the type of reference signal of the new beam, the quasi-co-location reference signal (QCL RS) or measurement reference signal corresponding to the transmit configuration indicator (TCI) state instructed for the current beam, and upper layer parameters.

(user terminal)
16 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

Note that this example mainly shows the functional blocks that characterize the present embodiment, and the user terminal 20 may also have other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., as described based on common understanding in the technical field to which this disclosure pertains.

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

The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to this disclosure.

The transceiver unit 220 may be configured as an integrated transceiver unit, or may be composed of a transmitter unit and a receiver unit. The transmitter unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiver unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

The transmitting and receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

The transceiver unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

The transceiver unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

Whether or not to apply DFT processing may be based on the settings for transform precoding. If transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform; if not, it may not be necessary to perform DFT processing as the transmission processing.

The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

The transceiver unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

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

The measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources. The channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on interference measurement resources. The interference measurement resources may be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc. CSI-IM may also be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. In this disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeable.

Note that the transmitter and receiver of the user terminal 20 in this disclosure may be configured by at least one of the transmitter/receiver 220 and the transmitter/receiver antenna 230.

The transceiver unit 220 may receive information regarding the quasi-co-location reference signal (QCL RS) that is set to the indicated transmission configuration indicator (TCI) state.

When only a tracking channel state information reference signal (TRS) is set as the QCL RS, the control unit 210 may control at least one of measurement and reporting of the reference signal of the current beam using a reference signal different from the TRS. As the reference signal different from the TRS, the control unit 210 may select one channel state information reference signal mapped to a synchronization signal block corresponding to the indicated TCI state. As the reference signal different from the TRS, the control unit 210 may select a channel state information reference signal associated with the TRS. As the reference signal different from the TRS, the control unit 210 may select a channel state information reference signal associated with the TCI state index of the indicated TCI state.

The transceiver unit 220 may transmit at least one of the measurement results of the reference signal corresponding to the current beam and the measurement results of the reference signal corresponding to the new beam.

The control unit 210 may control the measurement of a reference signal corresponding to the current beam and a reference signal corresponding to the new beam. If multiple schemes are supported for measuring the reference signal corresponding to the current beam, the control unit 210 may determine the scheme to be used for measuring the reference signal corresponding to the current beam based on at least one of the type of reference signal of the new beam, the quasi-co-location reference signal (QCL RS) or measurement reference signal corresponding to the transmit configuration indicator (TCI) state indicated for the current beam, and upper layer parameters.

The number of available schemes may vary depending on whether only a tracking channel state information reference signal (TRS) is set as the QCL RS corresponding to the indicated TCI state.

If a channel state information reference signal is set as the reference signal for a new beam and only a tracking channel state information reference signal (TRS) is set as the QCL RS corresponding to the indicated TCI state, the control unit 210 may use a reference signal derived from the QCL RS as the current beam reference signal.

If the reference signal of the current beam is set to a reference signal setting that is different from the reference signal setting of the reference signal of the new beam, the control unit 210 may report the measurement results of the reference signal of the current beam using at least one of a specific index and a specific position for the reference signal of the current beam.

(Hardware configuration)
The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of hardware and/or software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (e.g., wired, wireless, etc.) and these multiple devices. The functional block may also be realized by combining software with the single device or multiple devices.

Here, functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission functions may be called a transmitting unit, transmitter, etc. As mentioned above, there are no particular limitations on how these functions are implemented.

For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 17 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, memory 1002, storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

In this disclosure, terms such as apparatus, circuit, device, section, and unit may be used interchangeably. The hardware configuration of the base station 10 and user terminal 20 may be configured to include one or more of the devices shown in the figures, or may be configured to exclude some of the devices.

For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by a single processor, or processing may be performed by two or more processors simultaneously, sequentially, or using other techniques. Furthermore, the processor 1001 may be implemented by one or more chips.

The functions of the base station 10 and the user terminal 20 are realized, for example, by loading specific software (programs) onto hardware such as the processor 1001 and memory 1002, causing the processor 1001 to perform calculations, control communications via the communication device 1004, and control at least one of reading and writing data from and to the memory 1002 and storage 1003.

The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) that includes an interface with peripheral devices, a control unit, an arithmetic unit, registers, etc. For example, at least a portion of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001.

In addition, 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 executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be used for other functional blocks.

Memory 1002 is a computer-readable recording medium and may be composed of, for example, at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. Memory 1002 may also be referred to as a register, cache, main memory, etc. Memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method according to one embodiment of the present disclosure.

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

The communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, or communication module. The communication device 1004 may be configured to include high-frequency switches, duplexers, filters, frequency synthesizers, etc. to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitter/receiver unit 120 (220), transmitter/receiver antenna 130 (230), etc. may be implemented by the communication device 1004. The transmitter/receiver unit 120 (220) may be implemented as a transmitter unit 120a (220a) and a receiver unit 120b (220b) that are physically or logically separated.

The input device 1005 is an input device (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, speaker, Light Emitting Diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

Furthermore, each device, such as the processor 1001 and memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

Furthermore, the base station 10 and user terminal 20 may 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 some or all of the functional blocks may be realized using this hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

In addition, devices included in the core network 30 (e.g., network nodes that provide NF) may also be realized using the above-mentioned functional block/hardware configuration.

(Modification)
Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

Here, numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, 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/receiver in the frequency domain, and specific windowing processing performed by the transmitter/receiver in the time domain.

A slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols or Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols). A slot may also be a time unit based on numerology.

A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

Radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals. Radio frame, subframe, slot, minislot, and symbol may each be referred to by a different name. Note that the time units used in this disclosure, such as frame, subframe, slot, minislot, and symbol, may be interchangeable.

For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. In other words, at least one of a subframe and a TTI may be a subframe (1 ms) as in existing LTE, or may be a period shorter than 1 ms (e.g., 1-13 symbols), or may be a period longer than 1 ms. Note that the unit representing a TTI may be called a slot, minislot, etc. instead of a subframe.

Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as the frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. However, the definition of TTI is not limited to this.

The TTI may be a transmission time unit for a channel-encoded data packet (transport block), code block, code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., number of symbols) to which a transport block, code block, code word, etc. is actually mapped may be shorter than the TTI.

Note that when one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the smallest time unit for scheduling. Furthermore, the number of slots (minislots) that make up the smallest time unit for scheduling may be controlled.

A TTI with a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, minislot, subslot, slot, etc.

Note that a long TTI (e.g., a normal TTI, subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length of 1 ms or more but less than the TTI length of a long TTI.

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

Furthermore, an RB may include one or more symbols in the time domain and may be one slot, one minislot, one subframe, or one TTI in length. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

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

Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

A Bandwidth Part (BWP) (which may also be referred to as a partial bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier. Here, the common RBs may be identified by the index of the RB relative to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

BWPs may include UL BWPs (BWPs for UL) and DL BWPs (BWPs for DL). One or more BWPs may be configured for a UE within one carrier.

At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP. Note that "cell," "carrier," etc. in this disclosure may be read as "BWP."

Note that the structures of the radio frames, subframes, slots, minislots, and symbols described above are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be changed in various ways.

Furthermore, the information, parameters, etc. described in this disclosure may be expressed using absolute values, relative values from a predetermined value, or other corresponding information. For example, radio resources may be indicated by a predetermined index.

The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the mathematical formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

Information, signals, etc. may be output from a higher layer to a lower layer and/or from a lower layer to a higher layer. Information, signals, etc. may be input/output via multiple network nodes.

Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be sent to another device.

With regard to any information (e.g., variables, constants, parameters) described in this disclosure, even if not specifically stated in the above embodiments, any first device (e.g., UE/base station) may notify any second device (e.g., base station/UE) of information indicating/identifying (or relating to) the value of that information.

The notification of information is not limited to the aspects/embodiments described in this disclosure, and may be performed using other methods. For example, the notification of information in this disclosure may be performed using physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI))), 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 a combination of these.

Note that physical layer signaling may also be referred to as Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), etc. Furthermore, RRC signaling may also be referred to as RRC messages, such as RRC Connection Setup messages or RRC Connection Reconfiguration messages. Furthermore, MAC signaling may also be notified using, for example, MAC Control Elements (CEs).

Furthermore, notification of specified information (e.g., notification that "X is true") is not limited to explicit notification, but may also be done implicitly (e.g., by not notifying the specified information or by notifying other information).

The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or a comparison of numerical values (e.g., comparison with a predetermined value).

Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

In addition, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technology (such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)) and/or wireless technology (such as infrared or microwave), then the wired and/or wireless technology is included within the definition of transmission medium.

As used in this disclosure, the terms "system" and "network" may be used interchangeably. "Network" may refer to devices included in the network (e.g., base stations).

In this disclosure, terms such as "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," "layer," "number of layers," "rank," "resource," "resource set," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," "UE panel," "transmitting entity," "receiving entity," etc. may be used interchangeably.

In the present disclosure, the term "antenna port" may be interchangeably read as an antenna port for any signal/channel (e.g., a demodulation reference signal (DMRS) port). In the present disclosure, the term "resource" may be interchangeably read as a resource for any signal/channel (e.g., a reference signal resource, an SRS resource, etc.). The resource may include time/frequency/code/space/power resources. The spatial domain transmit filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

The above groups may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, etc.

Furthermore, in this disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable terms.

Furthermore, in this disclosure, terms such as TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, and joint TCI state may be interpreted interchangeably.

Furthermore, in this disclosure, terms such as "QCL," "QCL assumptions," "QCL relationships," "QCL type information," "QCL properties," "specific QCL type (e.g., Type A, Type D) properties," and "specific QCL types (e.g., Type A, Type D)" may be read interchangeably.

In this disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interchangeable. In this disclosure, terms such as sequence, list, set, group, cluster, and subset may be interchangeable.

Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and spatial relationship information (TCI state) may be interchangeable. "Spatial relationship information (TCI state)" may be interchangeable as "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. TCI state and TCI may be interchangeable. Spatial relationship information and spatial relationship may be interchangeable.

In this disclosure, terms such as "Base Station (BS)," "Radio Base Station," "Fixed Station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "Access Point," "Transmission Point (TP)," "Reception Point (RP)," "Transmission/Reception Point (TRP)," "Panel," "Cell," "Sector," "Cell Group," "Carrier," and "Component Carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of at least one of the base station and base station subsystems that provide communication services within this coverage area.

In this disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control/operate based on that information.

In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

The mobile body in question refers to an object that can move at any speed, and of course also includes cases where the mobile body is stationary. Examples of the mobile body in question include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted on these. The mobile body in question may also be a mobile body that moves autonomously based on operation commands.

The moving object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving object (e.g., a drone, a self-driving car, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

FIG. 18 is a diagram showing an example of a vehicle according to one embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

The drive unit 41 is composed of, for example, at least one of an engine, a motor, or a hybrid of an engine and a motor. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., an input/output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

Signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the motor current, a rotation speed signal for the front wheels 46/rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal for the front wheels 46/rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal for the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal for the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal for the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

The information service unit 59 is composed of various devices, such as a car navigation system, audio system, speakers, displays, televisions, and radios, that provide (output) various information such as driving information, traffic information, and entertainment information, as well as one or more ECUs that control these devices. The information service unit 59 uses information obtained from external devices via the communication module 60, etc., to provide various information/services (e.g., multimedia information/multimedia services) to the occupants of the vehicle 40.

The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

The driving assistance system unit 64 is composed of various devices that provide functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Unit (IMU) and Inertial Navigation System (INS)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance or autonomous driving functions.

The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 between the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, all of which are provided on the vehicle 40.

The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with external devices. For example, it sends and receives various information to and from external devices via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or user terminal 20 described above. The communication module 60 may also be, for example, at least one of the base station 10 and user terminal 20 described above (or may function as at least one of the base station 10 and user terminal 20).

The communications module 60 may transmit at least one of the following to an external device via wireless communication: signals from the various sensors 50-58 described above input to the electronic control unit 49; information obtained based on these signals; and information based on input from the outside (user) obtained via the information service unit 59. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may also be referred to as input units that accept input. For example, the PUSCH transmitted by the communications module 60 may include information based on the above input.

The communications module 60 receives various information (traffic information, traffic signal information, vehicle-to-vehicle information, etc.) transmitted from external devices and displays it on the information service unit 59 installed in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communications module 60 (or data/information decoded from the PDSCH)).

Furthermore, the communication module 60 stores various information received from external devices in memory 62 that can be used by the microprocessor 61. Based on the information stored in memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and other components provided on the vehicle 40.

Furthermore, the base station in the present disclosure may be read as a user terminal. For example, the aspects/embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions possessed by the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "sidelink"). For example, terms such as uplink channel and downlink channel may be read as sidelink channel.

Similarly, the user terminal in this disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions possessed by the user terminal 20 described above.

In this disclosure, operations described as being performed by a base station may in some cases also be performed by its upper node. In a network including one or more network nodes having base stations, it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) or a Serving-Gateway (S-GW)), or a combination thereof.

Each aspect/embodiment described in this disclosure may be used alone, in combination, or switched between depending on the implementation. Furthermore, the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this disclosure may be rearranged as long as they are consistent. For example, the methods described in this disclosure present various step elements in an exemplary order, and are not limited to the specific order presented.

Each aspect/embodiment described in this disclosure may be applied to any of the following mobile communication systems: 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 (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio The present invention may be applied to systems that use Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other appropriate wireless communication methods, as well as next-generation systems that are extended, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A with 5G).

As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

As used in this disclosure, the term "determining" may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., searching in a table, database, or other data structure), ascertaining, etc.

Furthermore, "determination" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

Furthermore, "judgment (decision)" may be considered to mean "judging (deciding)" resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment (decision)" may be considered to mean "judging (deciding)" some kind of action. In this disclosure, "judgment (decision)" may be read interchangeably with the above-mentioned actions.

Furthermore, in this disclosure, "determine/determining" may be interpreted interchangeably as "assume/assuming," "expect/expecting," "consider/considering," etc. Furthermore, in this disclosure, "does not expect to do..." may be interpreted interchangeably as "assumes not to do...."

In the present disclosure, "expect" may be interchangeably read as "be expected." For example, "expect(s)..." ("..." may be expressed, for example, as a that clause, a to-infinitive, etc.) may be interchangeably read as "be expected..." or "does... (if the above "..." is a to-infinitive, a verb with "to")." "does not expect..." may be interchangeably read as "be not expected..." or "does not... (if the above "..." is a to-infinitive, a verb with "to")." Furthermore, "An apparatus A is not expected..." may be interchangeably read as "apparatus B other than apparatus A does not expect..." from apparatus A (for example, if apparatus A is a UE, apparatus B may be a base station).

The term "maximum transmit power" used in this disclosure may refer to the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

As used in this disclosure, the terms "connected," "coupled," or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

For the purposes of this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

In this disclosure, the term "A and B are different" may mean "A and B are different from each other." Note that this term may also mean "A and B are each different from C." Terms such as "separate" and "combined" may also be interpreted in the same way as "different."

When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

In this disclosure, where articles are added by translation, such as a, an, and the in English, this disclosure may include the noun following these articles being plural.

In this disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be read interchangeably. Furthermore, in this disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be read interchangeably, not limited to the positive, comparative, and superlative. Furthermore, in this disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be read interchangeably, not limited to the positive, comparative, and superlative, as expressions with the prefix "i-th" (i is any integer) (for example, "highest" may be read interchangeably as "i-th highest").

In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

In the present disclosure, expressions such as "when A, B," "if A, (then) B," "B upon A," "B in response to A," "B based on A," "B during/while A," "B before A," "B at (the same time as)/on A," "B after A," "B since A," and "B until A" may be interchangeable. Note that A and B may be replaced with other appropriate expressions, such as nouns, gerunds, and regular sentences, depending on the context. The time difference between A and B may be nearly zero (immediately after or immediately before). A time offset may also be applied to the time at which A occurs. For example, "A" may be interpreted interchangeably as "before/after the time offset at which A occurs." The time offset (e.g., one or more symbols/slots) may be predefined or may be determined by the UE based on signaled information.

In the present disclosure, terms such as timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, and resource may be interpreted interchangeably.

The invention according to the present disclosure has been described in detail above, but it will be clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described herein. The description of the present disclosure is for illustrative purposes only and does not pose any limitations on the invention according to the present disclosure.

Claims (6)

a control unit for controlling measurement of a reference signal corresponding to the current beam and a reference signal corresponding to the new beam;
a transmitter that transmits at least one of a measurement result of a reference signal corresponding to the current beam and a measurement result of a reference signal corresponding to the new beam;
The control unit determines a scheme to be used for measuring the reference signal corresponding to the current beam based on at least one of the type of the reference signal of the new beam, a quasi-co-location reference signal (QCL RS) or a measurement reference signal corresponding to a transmission configuration indicator (TCI) state indicated for the current beam, and upper layer parameters when multiple schemes that can be used for measuring the reference signal corresponding to the current beam are supported. The terminal according to claim 1, wherein the number of available schemes varies depending on whether only a tracking channel state information reference signal (TRS) is set as the QCL RS corresponding to the indicated TCI state. The terminal of claim 1, wherein when a channel state information reference signal is set as the reference signal for the new beam and only a tracking channel state information reference signal (TRS) is set as the QCL RS corresponding to the indicated TCI state, the control unit uses a reference signal derived from the QCL RS as the current beam reference signal. The terminal of claim 1, wherein when the reference signal of the current beam is set to a reference signal setting different from the reference signal setting of the reference signal of the new beam, the control unit reports the measurement result of the reference signal of the current beam using at least one of a specific index and a specific position for the reference signal of the current beam. controlling measurements of a reference signal corresponding to the current beam and a reference signal corresponding to the new beam;
transmitting at least one of a measurement result of a reference signal corresponding to the current beam and a measurement result of a reference signal corresponding to the new beam;
A wireless communication method for a terminal that, when multiple schemes that can be used for measuring a reference signal corresponding to the current beam are supported, determines a scheme to be used for measuring the reference signal corresponding to the current beam based on at least one of the type of the reference signal of the new beam, a quasi-co-location reference signal (QCL RS) or a measurement reference signal corresponding to a transmission configuration indicator (TCI) state indicated for the current beam, and upper layer parameters. a receiver for receiving at least one of a measurement result of a reference signal corresponding to a current beam and a measurement result of a reference signal corresponding to a new beam;
a control unit configured to instruct a scheme to be used for measuring a reference signal corresponding to the current beam using at least one of a type of reference signal of the new beam, a quasi-co-location reference signal (QCL RS) or a measurement reference signal corresponding to a transmission configuration indicator (TCI) state to be instructed for the current beam, and an upper layer parameter when multiple schemes that can be used for measuring a reference signal corresponding to the current beam are supported.