Terminal, radio communication method, and base station

Abstract

To improve communication quality / throughput.SOLUTION: A terminal according to an aspect of the present disclosure has: a receiving section that receives settings related to an event 1 for a beam report (UEIBR) started by the terminal; and a control section that controls a report format of the UEIBR on the basis of the settings. The control section selects format options for the event 1 according to a specific condition.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) has been specified with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Also, LTE-Advanced (3GPP Rel. 10-14) has been specified with the aim of achieving higher capacity and more advanced features than LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9).

[0003] 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) are also being considered. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention [Problem to be solved by the invention]

[0005] In future wireless communication systems (e.g., NR, Rel. 19 and later), support for UE-initiated Beam Report (UEIBR) is being considered.

[0006] Such beam reporting (CSI measurement / reporting) is being considered for support in MIMO / mobility from Rel. 19 onwards.

[0007] However, there are cases where the CSI measurement / reporting (UEIBR) for MIMO is not sufficiently considered. If this consideration is insufficient, it may not be possible to achieve lower latency communications, which may result in suppression of improvements in communication quality / throughput.

[0008] Therefore, one object of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can improve communication quality / throughput. [Means for solving the problem]

[0009] A terminal according to one embodiment of the present disclosure has a receiving unit that receives settings regarding event 1 for a terminal-initiated beam report (UEIBR), and a control unit that controls the reporting format of the UEIBR based on the settings, and the control unit selects a format option for event 1 according to specific conditions. [Effects of the Invention]

[0010] According to one aspect of the present disclosure, communication quality / throughput can be improved. [Brief explanation of the drawings]

[0011] [Figure 1]Fig. 1A is a diagram showing an example of UE movement in Rel. 17. Fig. 1B is a diagram showing an example of UE movement in Rel. 18. [Figure 2] FIG. 2 is a diagram illustrating an example of RS configuration for a new beam. [Figure 3] FIG. 3 is a diagram showing an example of the report content of the present disclosure. [Figure 4] FIG. 4 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 5] FIG. 5 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 6] FIG. 6 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 7] FIG. 7 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. [Figure 8] FIG. 8 is a diagram illustrating an example of a vehicle according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] (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 replaced with the TRP in the serving cell. Layer 1 / layer 2 (L1 / L2) and DCI / Medium Access Control Control Element (MAC CE) may be replaced with each other. 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 replaced with each other.

[0013] <Scenario 1> Scenario 1 corresponds to, for example, multi-TRP inter-cell mobility, but may also be a scenario that does not correspond to multi-TRP inter-cell mobility.

[0014] (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 the different PCI. (2) The UE performs beam measurement of the 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 multiple TRPs. As in conventional systems, the UE must use common channels from the serving cell, such as the Broadcast Control Channel (BCCH) and the Paging Channel (PCH).

[0015] In Scenario 1, when the UE transmits and receives signals to and from an additional cell / TRP (a TRP corresponding to the PCI of the additional cell), the serving cell (the serving cell assumed by the UE) 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.

[0016] Figure 1A shows an example of UE movement in Rel. 17. Assume that the UE moves from a cell (serving cell) with PCI #1 to a cell (additional cell) with PCI #3 (which overlaps with the serving cell). In this case, Rel. 17 does not support switching of the serving cell via L1 / L2.

[0017] 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 needs to be within the coverage of the serving cell to receive UE common channels (e.g., system information / paging / short messages). When the UE moves out of the coverage of the serving cell, a cell change is required, for example, by handover (also known as L3 mobility).

[0018] <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, by applying L1 / L2 inter-cell mobility that does not require handover, data communication can be continued even when the serving cell is changed. Scenario 2 may be applied in Rel. 18, for example. In scenario 2, for example, the following procedure is performed.

[0019] (1) The UE receives from the serving cell the SSB configuration of a cell (additional cell) with a different PCI for 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 the configuration of cells with different PCIs (serving cell configuration) through upper layer signaling (e.g., RRC). That is, pre-configuration regarding serving cell change may be performed. This configuration may be performed together with the configuration in (1), or may be performed separately. (4) Based on the above report, the TCI states of cells with different PCIs may be activated by L1 / L2 signaling according to the change of the serving cell. The activation of the TCI state and the change of the serving cell may be performed separately. (5) The UE changes the serving cell (assumption of the serving cell) and starts receiving / sending using a pre-configured UE-specific channel and TCI state.

[0020] That is, in Scenario 2, the serving cell (assumption of the serving cell in the UE) is updated by L1 / L2 signaling. Scenario 2 may be applied in Rel.18.

[0021] FIG. 1B is a diagram showing an example of the movement of the UE in Rel.18. In Rel.18, the serving cell is switched by L1 / L2 (e.g., DCI / MAC CE). The UE can receive / send UE-specific channels / common channels between the new serving cell (or the target serving cell). The UE may go out of the coverage of the current serving cell (e.g., Current serving cell).

[0022] (Type of beam report) <Intra-cell beam report in Rel.15 / 16> In Rel.15 / 16, intra-cell beam reporting is supported. For example, L1-RSRP / SINR reports can be configured by upper layer signaling (RRC).

[0023] For example, in calculating the L1-RSRP, the UE may be configured with either or both of the CSI-RS resources and the SS / PBCH block resources if the resources are associated with QCL Type C / Type D.

[0024] A UE may also be configured with up to 16 CSI-RS resource sets, with a maximum of 64 resources in each set, with the total number of different CSI-RS resources across all resource sets being no more than 128.

[0025] For L1-RSRP reporting, if the higher layer parameter nrofReportedRS (e.g., in CSI-ReportConfig) is set to 1, the reported L1-RSRP value is defined as a 7-bit value in the range [-140 to -44] dBm with a step size of 1 dB.

[0026] Here, the maximum measured value of L1-RSRP is quantized to a 7-bit value in the range of [-140 to -44] dBm with a step size of 1 dB, and the differential value of L1-RSRP is quantized to a 4-bit value.

[0027] The difference value is calculated with a step size of 2 dB, with reference to the largest measurement that is part of the same L1-RSRP reporting instance.

[0028] For example, for L1-SINR calculation and channel measurement, a UE may be configured with either or both of NZP CSI-RS resources and SS / PBCH block resources, and for interference measurement, a UE may be configured with either NZP CSI-RS resources or CSI-IM resources.

[0029] For channel measurements, the UE may be configured with a CSI resource setting for up to 16 CSI-RS resource sets with up to 64 CSI resources or SS / PBCH block resources.

[0030] In the L1-SINR report, when the upper layer parameter nrofReportedRS is set to 1, the reported L1-SINR value is defined as a 7-bit value in the range of [-23~40] dBm with a step size of 0.5 dB.

[0031] When the upper layer parameter nrofReportedRS is set to a value greater than 1, or when the upper layer parameter groupBasedBeamReporting is set to "enabled", the UE uses the differential value-based L1-SINR value for reporting.

[0032] The differential value is calculated with a step size of 1 dB by referring to the maximum measured value that is part of the same L1-SINR reporting instance.

[0033] In this disclosure, the intra-cell beam reporting in Rel.15 / 16 (which may also be simply called intra-cell beam reporting) may be called type 1 beam reporting (beam reporting type 1), or beam reporting for intra-cell beam switching.

[0034] <Inter-cell beam reporting in Rel.17> As described above, in Rel.17, L1 / L2 inter-cell mobility is supported. For example, the UE can transmit and receive UL / DL channels / signals between the PCI of a cell different from the PCI of the serving cell. For example, when a non-serving cell has a larger RSRP than the serving cell, the UE can transmit and receive UL / DL channels / signals with the non-serving cell without performing a handover.

[0035] In the L1-RSRP report, the absolute / difference value of L1-RSRP may be used as in Rel.15 / 16. In the inter-cell beam report of Rel.17 (type 2-1 beam report described later), each L1-RSRP value is associated with a PCI ID (for the serving cell / additional cell / candidate cell). The association between the L1-RSRP value and the PCI ID may be set / instructed by upper layer signaling / physical layer signaling.

[0036] The setting by upper layer signaling supports up to seven additional cells. Note that ID=0 means the PCI of the serving cell.

[0037] In the present disclosure, the inter-cell beam report (in Rel.17 / 18) may be referred to as a type 2 beam report (beam report type 2). The type 2 beam report can be further classified into type 2-1 and 2-2 described later.

[0038] In the present disclosure, the beam report of Rel.17 may be referred to as a type 2-1 beam report or a beam report for inter-cell beam switching.

[0039] <Inter-cell beam report of Rel.18> Also, for the beam report of Rel.18, only the SSB-based L1-RSRP report (beam report) is supported. Here, the number of candidate cells L can be any one of 1 to 4, and the number of beams M per cell (per hit) can be any one of 1 to 4. For example, in the beam report, a 7-bit absolute value (the maximum L1-RSRP value among all cells) is reported for one cell, and all the remaining L1-RSRP values are reported as difference values.

[0040] Regarding the beam selection in the SSB-based L1-RSRP report, the maximum value of M*L that can be set by RRC for the above-mentioned M and L, and the combination of M and L may be appropriate depending on the UE capability.

[0041] In L1-RSRP reporting, the absolute value / differential value of L1-RSRP may be used, as in Rel. 15 / 16 / 17.

[0042] In the L1-RSRP report, the reported L1-RSRP value is defined as a 7-bit value in the range of [-140 to -44] dBm with a step size of 1 dB.

[0043] Here, the maximum measured value of L1-RSRP is quantized to a 7-bit value in the range of [-140 to -44] dBm with a step size of 1 dB, and the differential value of L1-RSRP is quantized to a 4-bit value.

[0044] The difference value is calculated with a step size of 2 dB, with reference to the largest measurement that is part of the same L1-RSRP reporting instance.

[0045] The L1-RSRP report includes the SSBRI between the configured candidate cells. That is, the L1-RSRP report includes the SSBRI of the configured candidate cells and the corresponding L1-RSRP. The format may be the same as that of the existing specifications.

[0046] In this disclosure, the beam report of Rel. 18 may be referred to as a Type 2-2 beam report or a beam report for cell switching. Note that a Type 2-2 beam report does not include information about the PCI (PCI ID). Instead, information about the PCI may be included in the SSBRI. For example, if four cells have 64 SSBs, the SSBRI can be any of {0, 1, . . . , 255}.

[0047] (UE-initiated Beam Report (UEIBR)) It is being considered that future wireless communication systems (e.g., Rel. 19 and later) will support event-based beam reporting, which may also be called event-triggered beam reporting or UE-initiated beam reporting (UEIBR).

[0048] UEIBR / UE initiated beam management (UEIBM) can be used for measurement reporting / beam switching / cell switching etc.

[0049] The UEIBR considers that the report content will include at least one of the following information in the beam report: 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 reporting.

[0050] Regarding the information regarding the number of beams / RSs to be reported, since the base station / network and the UE need to have a common understanding of the size of the beam report (e.g., UCI), it is preferable that this information be included in the beam report reported from the UE.

[0051] In this case, the UCI may be reported in two parts. For example, the UCI (which may have a fixed size) transmitted in the first part (step) may indicate the size (e.g., the number of beams) of the UCI transmitted in the second part (step).

[0052] 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 have a fixed size).

[0053] 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 of at least one new beam (e.g., L1-RSRP) 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 7: The quality of at least one new beam (e.g., L1-RSRP) becomes better than the RS derived from the best quality activated (active) TCI state up to Mth (M >= 1, M may be configured by RRC) by more than a threshold. Event 8: The quality (e.g., L1-RSRP) of M (more than 1: M>1) new beams becomes better than the current beam by more than a threshold. Event 9: The quality of at least one new beam (e.g. L1-RSRP) becomes better than the configured reference RS (which may be SSB / CSI-RS) by more than a threshold.

[0054] It should be noted that such event types do not exclude the events described above. For example, such event types may be appropriately interpreted as the events described above.

[0055] Furthermore, at least two of the above events may be defined in combination.

[0056] (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) in the indicated TCI state, where at least one of SSB and CSI-RS may be supported.

[0057] For example, for the "current beam" in a particular event (e.g., event 2), at least one of the following beam options 2a and 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 2c: The RS corresponding to the current beam is [explicitly] configured / indicated using RRC signaling / MAC CE.

[0058] 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 TCI state configuration parameters (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).

[0059] Note that the beam option names in this disclosure are merely examples and are not limited to the examples in this disclosure.

[0060] Also, for beam reports (UCI format) for specific events (e.g., Event 2), it is being considered to make the beam reports variable size / fixed size.

[0061] For example, for UCI format / content (which may also be referred to as reporting format / content), the following format options 1 / 1a / 1b / 2 / 3 are being considered for support: Format option 1: UCI size is variable and N beams are reported in one reporting instance (N is 1 to N max ). N beams satisfy the condition of Event 2. The maximum number of N (N max ) is set by the base station. Format option 1a: UCI size is variable and N beams are reported in one reporting instance (N is 1 to N max ). At least one beam out of N reported beams satisfies the condition of Event 2. The maximum number of N (N max ) is set by the base station. Format option 1b: UCI size is fixed (independent of N) and N beams are reported in one reporting instance (N ranges from 1 to N max ). N reported beams satisfy the conditions for Event 2. The maximum number of N (N max ) is set by the base station. Format option 2: The UCI size is fixed and one beam is reported in one reporting instance. The reported beam satisfies the conditions of event 2. Format option 3: The UCI size is fixed and N beams are reported in one reporting instance (N is a number greater than 1). At least one beam of the N reported beams satisfies the condition of event 2. N is configured by the base station.

[0062] Note that the above format options are merely examples, and options other than these may also be supported.

[0063] For N beams in format option 3 above (eg, dependent on event 2), a method for reporting the "current beam" is being considered.

[0064] For example, whether or not the UE should [always] report the current beam in the beam report may be configured / enabled / disabled using RRC signaling.

[0065] For example, when the RRC signaling sets the activation, the current beam and N beams based on RS measurements for the new beam may be reported, where the N beams may or may not include the current beam.

[0066] For example, if the disablement is configured by the RRC signaling, N beams based on RS measurements for the new beam may be reported.

[0067] RS configuration for new beams for Event 2 is being considered. For the RS configuration method, at least one of the following configuration options 1 to 3 may be supported. RS configuration option 1: RS for the new beam is explicitly configured in one RS resource set associated with the CSI reporting configuration. RS configuration option 2: A list of RSs for new beam measurements is configured using RRC signaling, and a subset of the list is activated for new beam measurements using MAC CE. RS configuration option 3: A list of RS resources for new beam measurements is configured using RRC signaling, and the indicated TCI state provides a subset of this list for new beam measurements.

[0068] 2 is a diagram showing an example of RS configuration for a new beam. In the example shown in FIG. 2, a CSI resource configuration (CSI-ResourceConfig) is included in a CSI reporting configuration (CSI-ReportConfig), and the CSI resource configuration includes a CSI resource set list. The CSI resource set list includes (CSI) resource sets #0 to #M, of which resource set #0 includes RSs #0 to #N as CSI-RS resources.

[0069] In the example shown in Fig. 2, in RS configuration option 1, an RS for a new beam is configured in one RS resource set associated with one CSI reporting configuration. Note that in RS configuration option 1, a MAC CE may be used to update the RS.

[0070] In the example shown in Fig. 2, in RS configuration option 2, a list of RSs for a new beam is configured using RRC signaling, and a part of the list (RSs #0 and #1 in the example of Fig. 2) is activated for new beam measurement using MAC CE. That is, in RS configuration option 2, MAC CE may be used to activate RSs.

[0071] In the example shown in Figure 2, in RS configuration option 3, a list of RS resources (multiple RS resource sets) for the new beam is configured using RRC signaling, and a subset of the list is provided for new beam measurement by the indicated TCI state. The selection rule for the RS resource set in this case needs to be considered.

[0072] The advantage of RS configuration option 1 is that it is simple to implement and can follow the existing CSI framework. However, there are concerns that it increases the load on the UE for measurements and requires separate RS resource configuration for UE IBR execution. However, this disadvantage can be resolved by using multiple events for one CSI resource set.

[0073] RS configuration option 2 can reduce the burden on UE measurements, and for example, enables UE IBR to be performed by activation by MAC CE. However, there are concerns that such MAC CE specifications are required and that the RS activated by the NW must be selected.

[0074] RS configuration option 3 can reduce the load on the UE when the number of RSs included in the CSI resource set is small, and the UE IBR can be performed using different resource sets depending on the indicated TCI state. However, it is necessary to specify new rules for identifying the subset of RS resources in the CSI resource set, and there is a concern that the measurement load on the UE depends on the size of the CSI resource set.

[0075] Although the above description has been given mainly using Event 2 as an example, the same applies to any other event.

[0076] By using such UEIBR / UEIBM, it is possible to reduce delay and UL resource overhead compared to existing beam reporting.

[0077] (UCI-based UEIBR) In the UCI-based UEIBR procedure, the following modes may be supported:

[0078] <<Mode A>> Mode A relates to dynamic scheduling of UCI by the NW (gNB). That is, in Mode A, resources for UCI are scheduled by the gNB. Mode A may be a basic function of the UE (a UE that supports UE-IBR may naturally support this function).

[0079] Step 1: The UE transmits a first UL channel (e.g., PUCCH), which is an UL channel that notifies / requests a second UL channel (e.g., PUCCH) for transmitting a beam report, and may be configured with one or more bits.

[0080] Step 2: The UE detects the DCI format indicating the second UL channel resource.

[0081] Step 3: The UE transmits a beam report using resources (UCI) on the second UL channel.

[0082] For mode A, at least a one-bit indication in the first UL channel (PUCCH) may be supported to request resources in the second UL channel for transmitting a beam report.

[0083] In this case, periodic PUCCH resources (PUCCH format 0 / 1) may be configured by dedicated higher layer signaling.

[0084] <<Mode B>> Mode B relates to UCI within pre-configured resources for the second UL channel.

[0085] Step 1: The UE transmits a first UL channel (e.g., PUCCH). The first UL channel is an UL channel that indicates a second UL channel for transmitting a beam report and may be configured with one or more bits. The first UL channel may be configured with one or more bits.

[0086] Step 2: The UE transmits a beam report in the second UL channel (eg, using a specific resource (UCI) within the channel).

[0087] Note that the notification in step 1 may be included in a separate reporting instance from the beam report in step 2.

[0088] For Mode B, at least a one-bit indication in the first UL channel (PUCCH) may be supported to indicate that the second UL channel is used to transmit a beam report.

[0089] In this case, periodic PUCCH resources (PUCCH format 0 / 1) may be configured by dedicated higher layer signaling.

[0090] In either of the above-mentioned modes A / B, cross-CC (component carrier) beam reporting may be supported.

[0091] The pre-configured resource for the second UL channel in step 2 of Mode B may be at least a CG PUSCH (eg, a Type 1 CG PUSCH).

[0092] The CG PUSCH may carry UL data (UL-SCH) and beam reports.

[0093] In addition, the CG PUSCH may be a CG PUSCH specific to transmitting beam reports (and may not transmit UL data / other UCI).

[0094] Furthermore, use of PUCCH and PUSCH with / without UL data as the second UL channel is being considered.

[0095] (Definition of events that can be supported in UEIBR) Of the multiple events mentioned above, the following events are particularly noteworthy:

[0096] ((Event 1)) Event 1 may mean that the quality of the current beam becomes worse than some predetermined threshold.

[0097] ((Event 2)) Event 2 may mean that the quality of at least one new beam (e.g., L1-RSRP) becomes better than a certain threshold compared to the quality of the current beam.

[0098] For event 2, at least one of the following schemes may be considered:

[0099] <Scheme 1> The RS of the current beam may be the QCL-RS in the indicated TCI state.

[0100] <Scheme 2> The RS of the current beam may be an SSB QCLed with a QCL-RS in the indicated TCI state.

[0101] ((Event 7)) Event 7 may mean that the quality of at least one new beam (e.g., L1-RSRP) becomes more than a threshold value better than the RS derived from the Qth highest quality (best quality) activated (active) TCI state.

[0102] Q is, for example, 1 or more, and is a value that can be set by the RRC according to UE capabilities. Q may be interchangeable with M described above.

[0103] For event 7, at least one of the following schemes may be considered:

[0104] <Scheme 1> The RS of the current beam may be the QCL-RS in the activated TCI state with the Qth best quality.

[0105] <Scheme 2> The RS of the current beam may be an SSB QCLed with the QCL-RS in the Qth best quality activated TCI state.

[0106] (analysis) By the way, the following is being considered for the reporting format of Event 1.

[0107] Specifically, in the CSI reporting configuration, an RS resource set for a new beam is configured, and the following can be exemplified as an implicit method for enabling either of the above-mentioned schemes 1 / 2.

[0108] If the RS of the new beam is a CSI-RS configured in a CSI-RS resource set with repetition, scheme 1 is enabled; otherwise, scheme 2 is enabled.

[0109] In this case, unless there are special circumstances, the reporting format for Event 2 (for example, at least one of the format options described above) may be reused.

[0110] However, if the reporting format for Event 1 follows the reporting format for Event 2, further consideration is required as to how the UE reports the RSRP value of the current beam (e.g., the specific report content).

[0111] <Assignment 1> In event 1, the current beam must always be reported. In this case, it is necessary to clarify how (in what format) the current beam is included in the report.

[0112] <Assignment 2> If you use a field (for the current beam) for event 2, you must include the absolute value for event 1.

[0113] As such, there has been insufficient consideration of UE-IBR for MIMO (particularly the content of the report on Event 1). If these considerations are insufficient, the UE will not be able to properly execute UE-IBR, and it will be impossible to achieve lower latency communications, which may result in a suppression of improvements in communication quality / throughput.

[0114] Therefore, the present inventors came up with a method for solving these problems.

[0115] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0116] (Various reading changes) In this disclosure, words enclosed in "()" in a sentence may indicate an explanation of the immediately preceding wording (for example, an explanation of spelling), a paraphrase, a specific example, a supplementary explanation, etc. Also, in this disclosure, words enclosed in "[ ]" in a sentence may be interpreted including the meaning of the entire sentence, or may be interpreted excluding the meaning of the entire sentence (ignoring the meaning of the entire sentence). Note that "()" and "[ ]" may also be used for purposes / meanings other than those mentioned above.

[0117] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0118] In the present disclosure, terms such as notify, activate, deactivate, indicate (or indicate), select, configure, update, and determine may be interchangeable. In the present disclosure, terms such as support, control, controllable, operate, and operate may be interchangeable.

[0119] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0120] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, 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 thereof.

[0121] 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.

[0122] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0123] In this disclosure, the terms drop, abort, cancel, puncture, rate match, postpone, do not transmit, etc. may be read interchangeably.

[0124] In the present disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In the present disclosure, the terms sequence, list, set, group, cluster, subset, pool, etc. may be interchangeable.

[0125] 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 relation 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 as interchangeable.

[0126] In the present disclosure, base station, gNB, and network (NW) may be interpreted as interchangeable.

[0127] 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.

[0128] In the present disclosure, the terms cell, PCI, serving cell, source serving cell, source cell, CC, BWP, BWP within CC, and band may be interchangeable. In the present disclosure, the terms 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, the terms switch, change, and update may be interchangeable. A serving cell may be interchangeable with a serving cell before a switch or a serving cell after a switch.

[0129] In the present disclosure, [for Rel. 19] event-based beam reporting, event-triggered beam reporting, event-driven beam reporting, UE-triggered beam reporting, UE-initiated beam reporting, event-triggered reporting / measurement, and UE-initiated beam management (UEIBM) may be read interchangeably.

[0130] In this disclosure, the event-triggered [beam] report may be interchangeably referred to as a beam report, a CSI report, an L1-RSRP beam report, or an L1-SINR beam report. These reports may also be simply referred to as reports.

[0131] In this disclosure, CSI reporting and CSI reporting for LTM in Rel. 18 may be read interchangeably.

[0132] In the present disclosure, beam report, UEIBR, UEIBR report, and simply report may be read interchangeably.

[0133] In the present disclosure, Type 1 beam report and beam report for intra-cell beam switching may be read interchangeably.

[0134] In the present disclosure, Type 2 beam report and inter-cell beam report may be read interchangeably.

[0135] In the present disclosure, Type 2-1 beam report and beam report for inter-cell beam switching may be read interchangeably.

[0136] In the present disclosure, Type 2-2 beam report and beam report for cell switching may be read interchangeably.

[0137] In this disclosure, terms such as table, mapping, association, list, format, content, report, etc. may be read interchangeably.

[0138] In the present disclosure, (new) MAC CE, UCI, cell switch command, beam switch command, beam report MAC CE, and cell switch MAC CE may be read interchangeably.

[0139] In the present disclosure, the event-based beam report may be reported in a PUSCH (e.g., a configuration grant PUSCH, a 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.

[0140] In the present disclosure, the terms report, resource for report, and resource may be interchangeable. For example, a first resource and a first report may be interchangeable, and a second resource and a second report may be interchangeable.

[0141] In the present disclosure, the number of beams and the number of resources may be read interchangeably.

[0142] In the present disclosure, ACK may be referred to as a positive response, and NACK may be referred to as a negative response. In the present disclosure, NACK may be information indicating a first value (e.g., 0 (or 1)), and ACK may be information indicating a second value (e.g., 1 (or 0)).

[0143] In the present disclosure, serving may be interchangeably read as serving beam / serving cell / SpCell.

[0144] In the present disclosure, neighbor may be interchangeably read as a beam / cell other than the serving beam / serving cell / SpCell / SCell.

[0145] In this disclosure, the pair of RS index and L1-RSRP / SINR may be referred to as an L1 measurement report, i.e., the L1 measurement report may include the pair of RS index and L1-RSRP / SINR.

[0146] In the present disclosure, candidate cells, target cells, neighboring cells, cells, etc. may be read interchangeably.

[0147] In the present disclosure, the occurrence of an event and the satisfaction of the conditions for the event may be read interchangeably.

[0148] In this disclosure, beam, RS, and [L1 / L3] measurement results may be interpreted interchangeably.

[0149] In this disclosure, the RS to be measured may be a QCL source RS in an active TCI state / indicated TCI state.

[0150] In the present disclosure, the spatial domain filter, the time domain filter, and the domain filter may be read interchangeably.

[0151] In this disclosure, NW / BS / gNB may be interpreted as interchangeable.

[0152] In the present disclosure, the current beam / new beam may correspond to at least one of an indicated TCI state, an indicated TCI state, an active TCI state, an activated TCI state, a configured TCI state, a configured TCI state, and an RS configured in RRC.

[0153] 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 read interchangeably.

[0154] In the present disclosure, the number of current beams / new beams may be one or more.

[0155] In the present disclosure, new beam / RS, candidate beam / RS, measurement beam / RS, measurement beam / RS, etc. may be read interchangeably.

[0156] In this disclosure, a new type of UCI (new UCI) may refer to a UCI that is transmitted in multiple bits (and multiple steps / parts).

[0157] Each embodiment of the present disclosure can be applied to any event.

[0158] In the present disclosure, L1-RSRP may be read interchangeably with L1-SINR.

[0159] In the present disclosure, the terms condition and threshold may be interpreted as interchangeable.

[0160] In the present disclosure, the filtered value (measured value: L1-RSRP), the filter value, and the L1-RSRP to which filtering by NW settings has been applied (NW-filtered L1-RSRP) may be read as interchangeable.

[0161] In the present disclosure, Mode A and Mode B may be interpreted as interchangeable.

[0162] In the present disclosure, CC, carrier, cell, serving cell, frequency, frequency carrier, carrier frequency, etc. may be interchangeable. In the present disclosure, a multiple CC report may be interchangeable with a multiple event report.

[0163] In the present disclosure, UCI and MAC CE may be read interchangeably as containers used in UEIBR.

[0164] 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)) and measurement results (e.g., L1-RSRP / RSRQ / SINR) corresponding to the (current / measured) beam. In this disclosure, information about a beam may mean the RS index / measurement results corresponding to the beam.

[0165] In this disclosure, "current beam" may mean "current beam of the current serving cell" in mobility.

[0166] 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, subset of RS resources, subset of RS, etc. may be interchangeable.

[0167] In the present disclosure, the type of CSI reporting may be periodic, semi-persistent, or aperiodic, i.e., the present disclosure is applicable to any type of CSI reporting.

[0168] In the present disclosure, multiplexing (multiplexing / being multiplexed) and mapping (mapping / being mapped) may be read interchangeably.

[0169] In the present disclosure, the UL channel that transmits UEIBR-CSI, CG PUSCH, Type 1 CG PUSCH, Type 2 CG PUSCH, DG PUSCH, and PUSCH may be interchangeable.

[0170] In the present disclosure, the other UL channels [transmitting other UCI], PUCCH, and PUSCH may be read interchangeably.

[0171] In the present disclosure, step 2 and step 3 in mode A may be collectively referred to as step 2. That is, step 2 and step 3 in mode A may be read as interchangeable.

[0172] In the present disclosure, the multiple events may be any of the events described above (or a combination of multiple events).

[0173] In the present disclosure, Mode A and Mode B may be interpreted as interchangeable. Step 1 in Mode A / Mode B may be interpreted as interchangeable. Step 3 in Mode A and Step 2 in Mode B may be interpreted as interchangeable.

[0174] The specific channel may be a PUSCH / PUCCH, and the specific signal may be an SRS, but is not limited thereto, and may be another channel / signal.

[0175] In the present disclosure, the first UL channel may be a PUCCH that signals / requests a second UL channel, and the second UL channel may be, for example, a DG / CG PUSCH.

[0176] In the present disclosure, the DCI, the first DL signal, and the ACK for the first UL channel in step 2 may be interpreted as interchangeable.

[0177] In the present disclosure, the terms [new] UCI, UCI for UEIBR, second UL channel, and PUSCH may be read interchangeably.

[0178] 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, subset of RS resources, subset of RS, etc. may be interchangeable.

[0179] In the present disclosure, PUCCH, SR, UCI, and HARQ-ACK may be interchangeable.

[0180] (Wireless communication method) The UE may perform / control measurements / reports by applying the present disclosure (the various provisions described above and the following embodiments). The NW / BS / gNB may provide / transmit to the UE settings / instructions, etc., for the UE to realize the measurement / reports control. Furthermore, the NW / BS / gNB may perform various controls necessary to receive the reports (beam reports / CSI reports) from the UE.

[0181] The present disclosure is applicable to each MIMO / mobility use case.

[0182] In the present disclosure, each embodiment / option may be applied alone or in combination with other embodiments / options.

[0183] In the present disclosure, CSI-RS and SSB may be read as interchangeable.

[0184] In the present disclosure, the terms resource, resource set, and list of resources may be read interchangeably.

[0185] In the present disclosure, the channel measurement resource, the interference measurement resource, and the resource may be read interchangeably.

[0186] In the present disclosure, the terms "criteria" and "condition / requirement" may be read interchangeably.

[0187] In the present disclosure, CSI acquisition, CSI measurement, and CSI reporting may be interpreted interchangeably.

[0188] In the present disclosure, ceil(A) may mean multiplying A by a ceiling function. Also, floor(A) may mean multiplying A by a floor function. Ceil(A) and floor(A) may be transformed / interchanged with each other.

[0189] In the present disclosure, specific parameter names are merely examples and are not limited to these. Furthermore, release numbers (for example, -r17, -r18, -19, etc.) in parameter names may or may not be present.

[0190] In this disclosure, the new UCI type, firstULUEIBR, and first UL channel may be read interchangeably.

[0191] According to the present disclosure, the rules regarding the report content of Event 1 for UE IBR are clarified. The UE can include the report content in a beam report and transmit it to the base station. As a result, communication with lower latency can be realized, and communication quality / throughput can be improved.

[0192] <0th embodiment> The 0th embodiment relates to the application conditions of the present disclosure.

[0193] A first embodiment described later may be applied when at least one of the following conditions is satisfied (any combination of the conditions is also possible):

[0194] That is, the UE may execute the UE IBR to which the first embodiment is applied in accordance with at least one of the following conditions:

[0195] Note that different options of the first embodiment may be applied for each of the following conditions.

[0196] (Condition 1) -Whether multiple event types (e.g., Events 1 / 2 / 7) are set per CC / across CC.

[0197] (Condition 2) ·Whether multiple event types are associated with one first UL channel (PUCCH) resource / one CSI trigger state / one UL channel (PUSCH) resource pre-configured for Mode B / one CSI configuration.

[0198] (Condition 3) -Which mode is set: Mode A or Mode B?

[0199] (Condition 4) · Whether the payload size of the UEIBR in the PUSCH is the same or different between the configured event types.

[0200] (Condition 5) ·Whether the RS of the current beam is included in the RS resource set of the new beam.

[0201] (Condition 6) · Whether mandatory reporting of the current beam is enabled by higher layer signaling (RRC).

[0202] (Condition 7) · Whether a time window (timer) and counter [for the event] is set.

[0203] (Condition 8) · Whether the report contains one or multiple RSs.

[0204] (Condition 9) · Whether the number of RSs set in the RS setting of the new beam is 0, 1, or multiple.

[0205] According to this embodiment, the application conditions of the present disclosure become clear.

[0206] First Embodiment The first embodiment relates to a method for reporting the current beam.

[0207] The UE may always report the RS measurement value (L1-RSRP) of the current beam for Event 1. The UE may also apply / use at least one of the following options as the reporting method (reporting format) for Event 1. That is, the UE may control the UE IBR (report content) for Event 1 according to at least one of the following options:

[0208] FIG. 3 is a diagram showing an example of the report content of the present disclosure.

[0209] (Opt1) RS field of (corresponding to) new beam in reporting format for event 2.

[0210] For example, if event 1 is set, the UE may use this field to report the RS of the current beam regardless of whether the RS of the current beam is set in the RS configuration of the new beam.

[0211] The absolute value of L1-RSRP may be reported for the current beam, i.e., the UE may include the absolute value of L1-RSRP for the current beam in the report.

[0212] Note that the UE may include in the report the differential value of L1-RSRP for the current beam instead of (in addition to) the absolute value.

[0213] The UE may report (include in the report) the RSs of the N-1 new beams.

[0214] ((Variation)) The reporting content may follow the format for Event 2. For example, if the maximum value (of L1-RSRP) is the RS of the current beam, the UE may report the absolute value for the current beam. Otherwise (if the maximum value is not the RS of the current beam), the UE may report the differential value for the current beam.

[0215] In addition, in a beam report, the first RS index may indicate the current beam.

[0216] As shown in FIG. 3, the field of Opt1 may correspond to fields indicating the absolute value (L1-RSRP#1) and the differential values ​​(differential L1-RSRP#2 to #N).

[0217] (Opt2) The RS field of the current beam in the reporting format for event 2.

[0218] For example, if event 1 is set, the UE may use this field to report the RS of the current beam.

[0219] If event 1 is set, the UE may use this field to report an absolute value for the current beam. Otherwise (if event 1 is not set), the UE may use this field to report a differential value for the current beam. In this case, zero padding may be used (the UE may apply zero padding) to align the payload size of the report.

[0220] The UE may report (include in the report) the RSs of the N new beams.

[0221] As shown in Figure 3, the Opt2 field may correspond to a field indicating the differential L1-RSRP for the current beam if the reporting mode in which the current beam is always reported is configured by RRC.

[0222] (Opt3) New RS field added for Event 1 (Reporting format for Event 1).

[0223] For example, when Event 1 is configured, the UE may use this field to report the RS (absolute value) of the current beam [dedicated / unique for Event 1] separately from the differential value (of L1-RSRP) for the current beam for Event 2.

[0224] The UE may report (include in the report) the RSs of the N new beams.

[0225] As shown in FIG. 3, the fields of Opt3 may correspond to other fields in the report.

[0226] (Note) In either of the above options, if event 1 is configured, the UE may report (include in the report) the RS index of the current beam.

[0227] According to this embodiment, the regulations regarding the reporting content of Event 1 for UEIBR are clarified. The UE can transmit the reporting content to the base station including it in the beam report. As a result, communication with lower latency can be realized, and communication quality / throughput can be improved.

[0228] <Supplementary> <<Notification of Information to UE>> The notification of any information from [the network (Network (NW)) (e.g., the base station (Base Station (BS)))] to the UE in the above-described embodiment (in other words, the reception of any information from the BS by the UE) may be performed using physical layer signaling (e.g., DCI), upper layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0229] When the above notification is performed by MAC CE, the MAC CE may be identified by including a new logical channel ID (Logical Channel ID (LCID)) not defined in the existing standard in the MAC sub-header.

[0230] When the above notification is performed by DCI, the above notification may be performed by a specific field of the DCI, a radio network temporary identifier (Radio Network Temporary Identifier (RNTI)) used for scrambling the cyclic redundancy check (Cyclic Redundancy Check (CRC)) bits assigned to the DCI, the format of the DCI, etc.

[0231] Also, the notification of any information to the UE in the above-described embodiment may be performed periodically, semi-persistently, or aperiodically.

[0232] <<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.

[0233] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID, which is not defined in existing standards, in the MAC subheader.

[0234] If the notification is performed by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0235] Furthermore, any information in the above-described embodiments may be notified from the UE periodically, semi-persistently, or aperiodically.

[0236] <<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 / assumment / information are set. The specific processing / action / control / assumption / information is determined based on the relevant upper 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 above specific processing / action / control / assumption / information is judged based on specific conditions.

[0237] The specific UE capabilities may indicate at least one of the following: Supporting specific processing / operations / control / information for at least one of the above embodiments. Support MIMO / mobility for Rel.19 and later. Support for UEIBR Rel.19 and later, and related settings / operations. Support new UCI types for UEIBR. Support reporting formats (format options) for Event 1 / 2.

[0238] Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (e.g., one or a combination of a cell, band, band combination, BWP, component carrier, etc.), or may be a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or may be a capability for each subcarrier spacing (SubCarrier Spacing (SCS)), or may be a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0239] Furthermore, the specific UE capability may be a capability that is applied across all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (for example, Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0240] If the above conditions are not met, the UE / BS may follow the behavior specified in existing 3GPP releases.

[0241] (Addendum) The following inventions are added regarding one embodiment of the present disclosure. [Appendix 1] a receiving unit for receiving a configuration for an event 1 for a terminal initiated beam report (UEIBR); A control unit that controls a report format of the UEIBR based on the setting, The control unit selects a formatting option for event 1 according to a specific condition. [Appendix 2] The terminal of Supplementary Note 1, wherein the control unit controls to report an absolute value for the current beam using the new beam field of the reporting format for event 2. [Appendix 3] The terminal of claim 1 or 2, wherein the control unit controls to report an absolute value or a differential value for the current beam using a current beam field in the reporting format for event 2. [Appendix 4] A terminal described in any one of Supplementary Note 1 to Supplementary Note 3, wherein the control unit controls to report an absolute value for the current beam using a field in a reporting format for Event 1.

[0242] (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.

[0243] 4 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may be simply referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0244] 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.

[0245] 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.

[0246] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0247] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are 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 embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.

[0248] The wireless communication system 1 may utilize Multi Input Multi Output (MIMO). For example, one cell may be formed by one antenna / base station 10, or may be formed by multiple antennas / base stations 10. One [virtual] cell (which may be called, for example, a super cell) may be composed of multiple [virtual] cells (which may be called, for example, sub-cells). A super cell may correspond to a cell whose physical range is fixed, and a sub-cell may correspond to a cell whose physical range varies semi-statically / dynamically. In this case, the wireless communication system 1 may be called a cell-free system.

[0249] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0250] 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)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (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 be a frequency band higher than FR2.

[0251] Furthermore, the user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

[0252] The multiple base stations 10 may be connected by wire (for example, optical fiber conforming to the Common Public Radio Interface (CPRI), an X2 / Xn interface, etc.) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0253] The 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), and the like.

[0254] The core network 30 may include network functions (NFs) such as 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 an Operation, Administration and Maintenance (Management) (OAM). Note that a single network node may provide multiple functions. Furthermore, communication with an external network (e.g., the Internet) may be performed via the DN.

[0255] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0256] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the radio communication system 1. For example, 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), or the like may be used in at least one of the downlink (DL) and the uplink (UL).

[0257] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0258] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0259] 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.

[0260] The PDSCH transmits user data, higher layer control information, System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit Master Information Block (MIB).

[0261] Lower layer control information may be transmitted by 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 the PUSCH.

[0262] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as an UL grant, a UL DCI, etc. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

[0263] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0264] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," "CORESET setting," etc. in the present disclosure may be read interchangeably.

[0265] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), acknowledgement 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.

[0266] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0267] 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, 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 as DL-RS.

[0268] 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 the SS (PSS, SSS) and the PBCH (and DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as reference signals.

[0269] 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). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0270] (base station) 5 is a diagram showing 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.

[0271] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, 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.

[0272] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0273] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0274] 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 configured with 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 the present disclosure.

[0275] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 1211 and an RF unit 122. The receiving unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0276] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0277] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0278] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0279] 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.

[0280] The transceiver 120 (transmission processor 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.

[0281] The transmitting / receiving unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna .

[0282] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna .

[0283] The transceiver 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.

[0284] 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.

[0285] 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 NFs), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0286] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0287] 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 functions of the physical layer (precoding, IFFT, FFT, etc.). The DU may perform higher-level functions of the physical layer (coding 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.

[0288] 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 read as RU / DU / CU.

[0289] The transceiver 120 may transmit settings related to Event 1 for a UE initiated beam report (UEIBR). The controller 110 may control reception of the UEIBR transmitted by applying a format option for Event 1 selected by the UE based on the settings and specific conditions.

[0290] (user terminal) 6 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.

[0291] Note that this example mainly shows functional blocks of the characteristic parts of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0292] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0293] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 220.

[0294] 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 configured from 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 the present disclosure.

[0295] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0296] The transmitting / receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0297] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0298] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0299] The transceiver 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.

[0300] The transceiver 220 (transmission processor 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.

[0301] Whether or not to apply DFT processing may be based on the setting of transform precoding. When 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, and when transform precoding is not enabled, the transceiver unit 220 may not perform DFT processing as the transmission processing.

[0302] The transmitting / receiving unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna 230.

[0303] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0304] The transceiver 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.

[0305] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, 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.

[0306] The measurement unit 223 may derive channel measurements for CSI calculation based on the 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 the interference measurement resources. The interference measurement resources may be at least one of an NZP CSI-RS resource for interference measurement, a CSI-Interference Measurement (IM) resource, etc. Note that CSI-IM may be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. Note that in the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeably read as interchangeable.

[0307] The transmitting section and receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0308] The control unit 210 may perform at least part of the processing of the control unit in the above appendix.

[0309] The transceiver unit 220 may perform at least part of the processing of the transmitter / receiver unit in the above appendix.

[0310] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and 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 (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or multiple devices with software.

[0311] Here, the 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 may be called a transmitting unit, transmitter, etc. As mentioned above, the implementation method of each is not particularly limited.

[0312] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 7 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0313] In this disclosure, terms such as apparatus, circuit, device, section, unit, etc. may be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0314] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0315] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0316] 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) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0317] The processor 1001 also reads programs (program codes), 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 realized by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be realized in a similar manner.

[0318] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory, or the like. The memory 1002 may store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to an embodiment of the present disclosure.

[0319] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a 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, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as a secondary storage device.

[0320] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0321] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0322] Furthermore, each device, such as the processor 1001 and the 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.

[0323] Furthermore, the base station 10 and the 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 such hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0324] Note that the devices included in the core network 30 (for example, network nodes that provide NFs) may also be realized by the above-described functional block / hardware configuration.

[0325] (Variation) Note that terms explained 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.

[0326] 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.

[0327] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), the number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0328] A slot may be composed of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol), and may be a time unit based on numerology.

[0329] A slot may include multiple minislots. Each minislot may consist of one or multiple 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.

[0330] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be interchangeable.

[0331] 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. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0332] 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 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.

[0333] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0334] 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 minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0335] A TTI having 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 or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0336] In addition, a long TTI (e.g., a normal TTI, a 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 shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0337] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0338] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0339] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0340] 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.

[0341] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0342] The BWP may include an UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0343] 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 the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0344] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. 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, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0345] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0346] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions 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 intended to be limiting in any way.

[0347] 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.

[0348] Furthermore, 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.

[0349] 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. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0350] With respect to any information (e.g., variables, constants, parameters) described in the present 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 the any information.

[0351] Notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0352] Note that the physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be called an RRC message, such as an RRC connection setup message or an RRC connection reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0353] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0354] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0355] 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.

[0356] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0357] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0358] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "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.

[0359] 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 transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0360] The group 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, and the like.

[0361] In addition, in the present disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable terms.

[0362] In addition, in the present disclosure, the terms TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0363] 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 type (e.g., Type A, Type D)" may be interchangeable.

[0364] 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.

[0365] 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 with "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. The TCI state and TCI may be interchangeable. The spatial relationship information and spatial relationship may be interchangeable.

[0366] 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," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0367] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0368] In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information.

[0369] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0370] 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.

[0371] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that 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.

[0372] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0373] The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, 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.

[0374] 8 is a diagram showing an example of a vehicle according to an embodiment. 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, axles 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.

[0375] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. 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.

[0376] 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).

[0377] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of 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 of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of 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.

[0378] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40.

[0379] 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.

[0380] The driving assistance system unit 64 is configured with various devices that provide functions for preventing accidents and reducing 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 Units (IMUs), Inertial Navigation Systems (INSs)), 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 functions or autonomous driving functions.

[0381] 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 to and from 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, which are provided in the vehicle 40.

[0382] 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 an external device. For example, it transmits and receives various information to and from the external device 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 above-mentioned base station 10 or user terminal 20. Furthermore, the communication module 60 may be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (or may function as at least one of the base station 10 and user terminal 20).

[0383] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0384] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on an information service unit 59 provided 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 communication module 60 (or data / information decoded from the PDSCH)).

[0385] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the 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 the like provided in the vehicle 40.

[0386] Furthermore, a 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 of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as uplink channel and downlink channel may be read as sidelink channel.

[0387] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0388] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal 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) and a Serving-Gateway (S-GW)), or a combination thereof.

[0389] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the specific order presented.

[0390] Each aspect / embodiment described in the present disclosure may be a technology other than 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 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 The present invention may be applied to systems that use 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other appropriate wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0391] 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."

[0392] 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.

[0393] The term "determining," as used in this disclosure, 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., looking up in a table, database, or another data structure), ascertaining, etc.

[0394] Additionally, "determining" 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.

[0395] Furthermore, "determination" may be considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "determining" some action. In the present disclosure, "determination" may be read interchangeably with the above-mentioned actions.

[0396] Furthermore, in this disclosure, "determine / determining" may be interchangeably read as "assume / assuming," "expect / expecting," "consider / considering," etc. Furthermore, in this disclosure, "does not expect to do..." may be interchangeably read as "assumes not to do...."

[0397] 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 ...," "do ... (if the above "..." is a to-infinitive, a verb with "to")," etc. "does not expect ..." may be interchangeably read as "be not expected ...," "does not ... (if the above "..." is a to-infinitive, a verb with "to")," etc. Furthermore, "An apparatus A is not expected ..." may be interchangeably read as "an 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).

[0398] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0399] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to 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."

[0400] In 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.

[0401] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0402] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0403] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0404] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with the prefix "i-th" (i is any integer) (for example, "highest" may be interchangeable as "i-th highest").

[0405] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0406] In the present disclosure, terms 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, B, and the like herein may be replaced with appropriate expressions, such as nouns, gerunds, and regular sentences, depending on the context. Note that the time difference between A and B may be nearly zero (immediately after or immediately before). A time offset may be applied to the time at which A occurs. For example, "A" may be interchangeable with "before / after the time offset at which A occurs." The time offset (eg, one or more symbols / slots) may be predefined or may be specified by the UE based on signaled information.

[0407] In the present disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc. may be read interchangeably.

[0408] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The description of the present disclosure is for illustrative purposes only and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. a receiving unit for receiving a configuration for an event 1 for a terminal initiated beam report (UEIBR); a control unit that controls a reporting format of the UEIBR based on the setting, The control unit selects a formatting option for event 1 according to a specific condition.

2. The terminal according to claim 1 , wherein the control unit controls to report an absolute value for a current beam by utilizing a new beam field in a reporting format for event 2.

3. The terminal according to claim 1 , wherein the control unit controls to report an absolute value or a differential value for the current beam by utilizing a current beam field in the reporting format for event 2.

4. The terminal according to claim 1 , wherein the control unit controls to report an absolute value for a current beam using a field in a report format for event 1.

5. receiving a configuration for Event 1 for terminal initiated beam reporting (UEIBR); and controlling a reporting format of the UEIBR based on the configuration; A wireless communication method for a terminal, wherein the terminal selects a format option for an event 1 according to a specific condition.

6. a transmitter for transmitting a configuration for an event 1 for a terminal initiated beam report (UEIBR); A base station comprising: a control unit that controls reception of the UEIBR that is transmitted by applying a format option for event 1 selected by the terminal based on the setting and specific conditions.

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