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 a channel state information (CSI) reference resource for a beam report that is triggered on the basis of a specific event; and a control section that controls the beam report on the basis of the settings. The CSI reference resource is defined for candidate cells for L1L2-triggered mobility (LTM).SELECTED DRAWING: Figure 2

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 sufficient consideration has not been given to beam reporting (which may also be called event-triggered beam reporting / event-driven beam reporting, etc.) for mobility (e.g., for LTM). 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 includes a receiving unit that receives a configuration regarding a channel state information (CSI) reference resource for a beam report triggered based on a specific event, and a control unit that controls the beam report based on the configuration, wherein the CSI reference resource is defined for a candidate cell for L1L2-triggered mobility (LTM). [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 a CSI reference resource. [Figure 3] FIG. 3 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present disclosure. [Figure 4] FIG. 4 is a diagram illustrating an example of a configuration of a base station according to an embodiment of the present disclosure. [Figure 5] FIG. 5 is a diagram illustrating an example of a configuration of a terminal according to an embodiment of the present disclosure. [Figure 6] FIG. 6 is a diagram illustrating an example of a hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. 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 a configuration of a cell with a different PCI (serving cell configuration) through higher layer signaling (e.g., RRC). That is, a pre-configuration regarding a serving cell change may be performed. This configuration may be performed together with the configuration in (1) or separately. (4) Based on the above report, the TCI states of cells with different PCIs may be activated by L1 / L2 signaling according to the change of serving cell. The activation of the TCI states and the change of serving cell may be performed separately. (5) The UE changes the serving cell (assumption of the serving cell) and starts receiving / transmitting using a preset 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] Figure 1B is a diagram showing an example of UE movement in Rel.18. In Rel.18, the serving cell is switched by L1 / L2 (e.g., DCI / MAC CE). The UE can receive / transmit a UE-dedicated channel / common channel between the new serving cell (or 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 reporting can be set by higher layer signaling (RRC).

[0023] For example, in the calculation of L1-RSRP, the UE can set either or both of the CSI-RS resource and the SS / PBCH block resource when the resource is associated with QCL type C / type D.

[0024] Also, the UE can be set with up to 16 CSI-RS resource sets each having up to 64 resources within each set. In all resource sets, the total number of different CSI-RS resources is 128 or less.

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

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

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

[0033] In the present disclosure, the intra-cell beam reporting in Rel.15 / 16 (which may also be simply referred to as 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, if 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 L1-RSRP reporting, the absolute value / difference value of L1-RSRP may be used as in Rel.15 / 16. In the inter-cell beam reporting in Rel.17 (type 2-1 beam reporting 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 / indicated 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 reporting (in Rel.17 / 18) may be called type 2 beam reporting (beam reporting type 2). Type 2 beam reporting 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 largest 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 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 according to the UE capabilities.

[0041] In the L1-RSRP report, the absolute value / difference 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~ -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~ -44] dBm with a step size of 1 dB. Also, the difference value of L1-RSRP is quantized to a 4-bit value.

[0044] The difference value is calculated with a step size of 2 dB by referring to the largest measured value that is part of the same L1-RSRP report instance.

[0045] [[ID=二十九]] 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] (Event-triggered beam reporting for mobility) The above-mentioned UEIBR (Event Triggered Beam Report) can also be extended for mobility.

[0057] For example, the following LTM events based on the beam quality of the serving cell and candidate cell are supported as L1 LTM measurement events. Event LTM2: The beam quality of the serving cell becomes worse than the absolute threshold. · Event LTM3: The beam of the candidate cell is better than the beam of the serving cell by an offset. · Event LTM4: The beam of the candidate cell becomes better than the absolute threshold. Event LTM5: The beam of the serving cell becomes worse than absolute threshold 1 (first absolute threshold) and the beam of the candidate cell becomes better than another absolute threshold 2 (second absolute threshold).

[0058] In addition to the events mentioned above, consideration is given to which beams of the serving cell and neighboring cells to use for event evaluation, or the necessity of event LTM1.

[0059] (CSI Reference Resources) The CSI reference resource of the serving cell may be defined as follows: Figure 2 is a diagram illustrating an example of the CSI reference resource. In the frequency domain, the band to which the derived CSI pertains. In the time domain, a single DL slot nn CSI_ref -K offset Assume that the CSI report is transmitted in UL slot n' (the n'th UL slot). The relationship between n and n' is as shown in Figure 2. That is, n is the DL slot corresponding to UL slot n' in which the CSI report is transmitted.

[0060] For periodic CSI and semi-persistent CSI reporting, n CSI_ref is the smallest value corresponding to a valid DL slot (4·2 for a single CSI-RS / SSB DL slot). μDL In the DL slot for multiple CSI-RS / SSB, the μDL That's all.

[0061] For aperiodic CSI reporting, n CSI_ref is the smallest value corresponding to a valid DL slot ([Z' / N symb slot ]). Since the UE is instructed by the DCI to report CSI in the same slot as the CSI request, n CSI_ref is in the same slot as the CSI request.

[0062] After a CSI reporting (reconfiguration), serving cell activation, BWP change, or semi-persistent CSI activation, the UE may transmit a CSI report only if a CSI-RS transmission opportunity for channel measurement or a CSI Interference Measurement (CSI-IM) opportunity for interference measurement is received later than the CSI reference resource. Otherwise, the UE may drop the CSI report.

[0063] If discontinuous reception (DRX) is configured, the above occasion (transmission opportunity) must be within the DRX active time, otherwise the UE may drop the CSI report.

[0064] For example, if the upper layer parameter ps-TransmitOtherPeriodicCSI is configured, the UE may transmit a CSI report within the drx-onDurationTimer even if the CSI is based on an occasion when the drx-onDurationTimer does not start.

[0065] If the timeRestrictionForChannelMeasurements in the higher layer parameter CSI-ReportConfig is set to "notConfigured", the UE shall derive the channel measurements for calculating the L1-RSRP reported in UL slot n (nth UL slot) based only on the SS / PBCH or NZP CSI-RS, so that the channel measurements are not later than the CSI reference resource associated with the CSI resource setting.

[0066] (analysis) In the existing specifications, a CSI reference resource indicating a time domain / frequency domain for CSI measurement / reporting / acquisition is defined for a serving cell.

[0067] On the other hand, it is required to define the CSI reference resource for acquiring CSI from the candidate cell for LTM. Therefore, the following issues are being considered.

[0068] <Assignment 1> It is necessary to clarify whether a CSI reference resource for LTM (exclusive to LTM) should be defined, and if so, for what CSI reports (e.g., report types) the CSI reference resource for LTM should be implemented.

[0069] <Assignment 2> It is necessary to clarify the use / purpose of the CSI reference resources for LTM.

[0070] As such, the regulations regarding beam reporting for mobility have not been sufficiently considered. If these considerations are insufficient, UEs will not be able to properly execute the beam reporting, and communication with lower latency will not be achieved, which may result in suppression of improvements in communication quality / throughput.

[0071] Therefore, the present inventors have conceived a method for solving these problems. According to one aspect of the present disclosure, communication quality / throughput can be improved.

[0072] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the respective embodiments may be applied independently or in combination. The present disclosure also provides embodiments in which part or all of one embodiment is combined with part or all of another embodiment.

[0073] (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.

[0074] 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."

[0075] 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.

[0076] 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.

[0077] In the present disclosure, signaling, message, field, parameter, information, payload, etc. may be read interchangeably.

[0078] In the present disclosure, higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, Non-Access Stratum (NAS) signaling [of the control plane], other messages (e.g., messages communicated to and from the core network, such as positioning protocol (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP)) messages), or a combination thereof.

[0079] 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.

[0080] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] In this disclosure, CSI reporting and CSI reporting for LTM in Rel. 18 may be read interchangeably.

[0086] In the present disclosure, beam report, UEIBR, UEIBR report, and simply report may be read interchangeably.

[0087] In the present disclosure, Type 1 beam report and beam report for intra-cell beam switching may be read interchangeably.

[0088] In the present disclosure, Type 2 beam report and inter-cell beam report may be read interchangeably.

[0089] In the present disclosure, Type 2-1 beam report and beam report for inter-cell beam switching may be read interchangeably.

[0090] In the present disclosure, Type 2-2 beam report and beam report for cell switching may be read interchangeably.

[0091] In this disclosure, terms such as table, mapping, association, list, format, content, report, etc. may be read interchangeably.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] In the present disclosure, the number of beams and the number of resources may be read interchangeably.

[0096] 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)).

[0097] In the present disclosure, serving may be interchangeably read as serving beam / serving cell / SpCell.

[0098] In the present disclosure, neighbor may be interchangeably read as a beam / cell other than the serving beam / serving cell / SpCell / SCell.

[0099] 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.

[0100] In the present disclosure, candidate cells, target cells, neighboring cells, cells, etc. may be read interchangeably.

[0101] In the present disclosure, the occurrence of an event and the satisfaction of the conditions for the event may be read interchangeably.

[0102] In this disclosure, beam, RS, and [L1 / L3] measurement results may be interpreted interchangeably.

[0103] In this disclosure, the RS to be measured may be a QCL source RS in an active TCI state / indicated TCI state.

[0104] In the present disclosure, the spatial domain filter, the time domain filter, and the domain filter may be read interchangeably.

[0105] In this disclosure, NW / BS / gNB may be interpreted as interchangeable.

[0106] 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.

[0107] 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.

[0108] In the present disclosure, the number of current beams / new beams may be one or more.

[0109] In the present disclosure, new beam / RS, candidate beam / RS, measurement beam / RS, measurement beam / RS, etc. may be read interchangeably.

[0110] 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).

[0111] Each embodiment of the present disclosure can be applied to any event.

[0112] In the present disclosure, L1-RSRP may be read interchangeably with L1-SINR.

[0113] In the present disclosure, the terms condition and threshold may be interpreted as interchangeable.

[0114] 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.

[0115] In the present disclosure, Mode A and Mode B may be interpreted as interchangeable.

[0116] 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.

[0117] In the present disclosure, UCI and MAC CE may be read interchangeably as containers used in UEIBR.

[0118] 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.

[0119] In this disclosure, "current beam" may mean "current beam of the current serving cell" in mobility.

[0120] 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.

[0121] 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.

[0122] In the present disclosure, multiplexing (multiplexing / being multiplexed) and mapping (mapping / being mapped) may be read interchangeably.

[0123] 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.

[0124] In the present disclosure, the other UL channels [transmitting other UCI], PUCCH, and PUSCH may be read interchangeably.

[0125] 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.

[0126] In the present disclosure, the multiple events may be any of the events described above (or a combination of multiple events).

[0127] 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.

[0128] 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.

[0129] In the present disclosure, the first UL channel may be a PUCCH that notifies / requests the second UL channel and may be referred to as the first PUCCH. The second UL channel may be, for example, a DG / CG PUSCH and may be referred to as the second PUSCH.

[0130] 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.

[0131] In the present disclosure, the [new] UCI, the UCI for UEIBR, the second UL channel, the PUSCH, and the second PUSCH may be read interchangeably.

[0132] 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.

[0133] In this disclosure, collision, overlap, and duplication may be interpreted interchangeably. Note that in this disclosure, collision / overlap may mean that one channel / signal (resources thereof) at least partially overlaps with another channel / signal (resources thereof) in the time domain.

[0134] 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.

[0135] In the present disclosure, CSI-RS and SSB may be read as interchangeable.

[0136] In the present disclosure, the terms resource, resource set, and list of resources may be read interchangeably.

[0137] In the present disclosure, the channel measurement resource, the interference measurement resource, and the resource may be read interchangeably.

[0138] In the present disclosure, the terms "criteria" and "condition / requirement" may be read interchangeably.

[0139] In the present disclosure, CSI acquisition, CSI measurement, and CSI reporting may be interpreted interchangeably.

[0140] In the present disclosure, the cell switch command (CSC), CSC MAC CE, and MAC CE may be read as interchangeable.

[0141] (Wireless communication method) Each embodiment of the present disclosure relates to the multiplexing / dropping rule of the first PUCCH in the UEIBR as follows.

[0142] The UE may perform / control measurements / reports by applying the present disclosure (the various provisions described above and the following embodiments). For example, the UE may control CSI acquisition for LTM by applying the present disclosure.

[0143] The NW / BS / gNB may provide / transmit to the UE settings / instructions for the UE to realize the control. Furthermore, the NW / BS / gNB may execute various controls necessary to receive the report (beam report / CSI report) from the UE.

[0144] The present disclosure is applicable to each use case of MIMO (UEIBR) / mobility (event-driven beam reporting).

[0145] In addition, the present disclosure is applicable not only to LTM triggered by the NW but also to conditional LTM (CLTM) as a use case of mobility. For example, as a condition for executing RACH-less in CLTM, whether the CSI measurement result is valid may be included. Further, the candidate cells to be subject to CSI measurement / reporting may be limited to candidate cells that satisfy a specific event. The specific event may be an event for CLTM / event-triggered beam reporting.

[0146] In the present disclosure, each embodiment / each option may be applied alone or in combination of a plurality.

[0147] According to the present disclosure, the definition of CSI reference resources for LTM becomes clear. The UE can appropriately control CSI acquisition / measurement / reporting according to the definition. As a result, communication with lower latency can be realized and communication quality / throughput can be improved.

[0148] <First Embodiment> The first embodiment corresponds to Problem 1 described above and relates to the definition of CSI reference resources for LTM.

[0149] <<Definition of CSI Reference Resources for LTM>> In the definition of CSI reference resources in the existing specification, "serving cell" can be applied by being read as a candidate cell / target cell in the present disclosure. That is, the definition of CSI reference resources for the serving cell in the existing specification may be used as the definition of CSI reference resources for candidate cells for LTM.

[0150] In addition, CSI reference resources dedicated to candidate cells of LTM may be defined. For example, the following can be exemplified.

[0151] <<<Specification Example>>> The CSI reference resources for candidate cells for LTM are defined as follows.

[0152] In the frequency domain, a CSI reference resource is defined by a group of multiple DL physical resource blocks (PRBs) corresponding to the band to which the derived CSI pertains.

[0153] In the time domain, the CSI reference resource for CSI reporting in UL slot n' is the CSI reference resource for a single DL slot nn CSI_ref -K offset 2 μ_DL / 2 μ_Koffset where K offset is a parameter set by the upper layer, and μ_Koffset is the offset μ_DL is the subcarrier spacing setting for DL, with a value of 0 in frequency ranges (FR)1 and FR2-NTN. μ_DL is the subcarrier spacing setting for DL.

[0154] Here, n may be expressed by the following formula: n=floor(n' 2 μ_DL / 2 μ_UL )+floor((N slot,offset,UL CA / 2 μ_offset,UL -N slot,offset,DL CA / 2 μ_offset,DL )·2 μ_DL ) That is, TIFF2025156285000002.tif12167

[0155] where μ_DL is the subcarrier spacing setting for DL, and μ_UL is the subcarrier spacing setting for UL. slot,offset CA and μ_offset may be determined by a parameter (ca-SlotOffset) set by higher layers for the cell transmitting UL / receiving DL.

[0156] <<Applicable conditions>> The definition of the CSI reference resource for the candidate cell for LTM described above may be implemented / applied [only] in the case of one of the options (reporting type) shown below. · Opt1: Early CSI acquisition only. Opt2: Event-triggered beam reporting only · Opt3: gNB scheduled beam reporting only (e.g. periodic / semi-persistent / aperiodic CSI reporting for candidate cell beams). · Opt4: Any combination of Opt1 to Opt3 above.

[0157] <<Candidate parameter values>> In the above Opt1 to Opt4 cases, n CSI_ref The possible values ​​of may be at least one of the following: CSI_ref The candidate values ​​for may be determined according to the following options (specific conditions): Alt1:n CSI_ref is 4·2 μ_DL This is the minimum value above. Alt2:n CSI_ref is 5·2 μ_DL This is the minimum value above. Alt3:n CSI_ref is a value such that the reference resource is in the same valid DL slot as the corresponding CSI request. Alt4:n CSI_ref is slot nn CSI_ref corresponds to a valid DL slot, symb slot ) where Z' corresponds to the delay requirement. N symb slot is the number of symbols in the slot. Alt5:n CSI_ref is a value such that the reference resource is in the same valid DL slot as the corresponding cell switch command that triggers the CSI report for the candidate cell. Alt6:n CSI_ref is X·2 μ_DLThe value of X may be predefined by the specification or may be determined according to the UE capabilities. Alt7:n CSI_ref is the smallest value greater than or equal to Y. The value of Y may be predefined by the specification or may be determined according to the UE capabilities.

[0158] <<Others>> The combinations of Opt1 to Opt4 and Alt1 to Alt7 described above, i.e., which candidate values ​​of Alt1 to Alt7 are applied to which options of Opt1 to Opt4, may be predefined by specifications, and may further be associated with at least one of the following conditions:

[0159] · When a single CSI-RS / SSB resource is configured. ·When multiple CSI-RS / SSB resources for channel measurement are configured. · Whether the UE is instructed by the DCI to report CSI in the same slot as the CSI request / cell switch command MAC CE.

[0160] According to this embodiment, the definition of the CSI reference resource for LTM is clear, and the UE can appropriately control CSI acquisition / measurement / reporting according to the definition.

[0161] <Second embodiment> The second embodiment addresses the above-mentioned problem 2 and relates to the use / purpose of CSI reference resources.

[0162] The definition of the CSI reference resource for the LTM candidate cell may be used for at least one of the following purposes / purposes, similar to the serving cell.

[0163] (Alt-A) When the parameter (timeRestrictionForChannelMeasurements) regarding the time constraint of channel measurements in the CSI report setting (CSI-ReportConfig) is set to "notConfigured (i.e., not set)", and / or when it is set to "Configured (i.e., set)", the UE measures the CMR resource (channel measurement resource) for L1-RSRP reporting.

[0164] (Alt-B) For CQI / CSI (RI / PMI / CQI), the UE measures the CMR resource (channel measurement resource).

[0165] (Alt-C) The measurement / reporting operations of the UE under specific conditions.

[0166] According to this embodiment, the use / purpose of the CSI reference resource for the LTM candidate cell is clarified. The UE can appropriately control CSI acquisition / measurement / reporting according to the definition.

[0167] <Supplementary> <<Notification of Information to UE / BS>> The notification of any information from the [network (Network (NW)) (e.g., base station (Base Station (BS))) / NW node] to the UE / BS in the above embodiment (in other words, the reception of any information from the BS / NW node by the UE / BS) may be performed using physical layer signaling (e.g., DCI), upper layer signaling (e.g., RRC signaling, MAC CE, NAS signaling, LPP message, NRPPa message), specific signals / channels (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0168] When the above notification is performed by a MAC CE, the MAC CE may be identified by including a new logical channel ID (LCID) not defined in the existing standard in the MAC sub-header.

[0169] 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 (RNTI) used for scrambling cyclic redundancy check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0170] Also, the notification of any information to the UE / BS in the above embodiments may be performed periodically, semi-persistently, or aperiodically. The semi-persistent or aperiodic information notification may be triggered by an instruction from the UE / BS / NW.

[0171] In the above embodiments, the information from the NW may be set / instructed by any one or a combination of the following methods: · Common to multiple UEs or UE-specific (for each UE), · Common to multiple BSs or BS-specific (for each BS), · Common to multiple frequencies (e.g., one or a combination of a cell, a band, a band combination, a bandwidth part (BWP), a component carrier, etc.) (e.g., cell common) or frequency-specific (for each frequency, e.g., for each cell).

[0172] <<Notification of Information from UE / BS>> In the above-described embodiments, notification of any information from the UE / BS [to the NW] (in other words, transmission / reporting of any information from the UE / BS to the BS / NW node) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE, NAS signaling, LPP message, NRPPa message), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0173] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID in the MAC subheader that is not defined in existing standards.

[0174] If the notification is performed by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0175] In addition, any information notification from the UE / BS in the above-mentioned embodiments may be performed periodically, semi-persistently, or aperiodically. Notification of semi-persistent or aperiodic information may be triggered by an instruction from the UE / BS / NW.

[0176] <<Application of each embodiment>> In a UE / BS, a specific (e.g., one or more, or part of) process / operation / control / assumption / information 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 in the UE / BS; The specific processing / operation / control / assumption / information is determined in the UE / BS based on relevant higher layer parameters; The above specific process / operation / control / assumption / information is specified / activated / triggered for the UE / BS by the MAC CE / DCI / UCI / resource / channel / RS, The UE / BS reports or supports specific capabilities (e.g., UE capabilities) that indicate (or relate to) the specific processing / action / control / assumptions / information. The application of the above specific processing / operation / control / assumption / information is determined in the UE / BS based on specific conditions.

[0177] The specified capabilities may indicate at least one of the following: · To support the above specific processes / actions / controls / assumptions / information. Support multiplexing / dropping rules for specific types of PUCCH (PUCCH format 0 / 1 / 2 / 3 / 4). Supported values ​​of K (number of SRs [settings]) and L (number of first PUCCHs [settings]).

[0178] In the present disclosure, "supporting" and "whether to support" may be read interchangeably.

[0179] Furthermore, the above-mentioned specific capabilities may be capabilities that are applied across all frequencies (commonly regardless of frequency), capabilities for each frequency (e.g., one or a combination of a cell, band, band combination, BWP, component carrier, etc.), capabilities for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0180] Furthermore, the above-mentioned specific capabilities may be capabilities that are applied across all duplexing methods (commonly regardless of the duplexing method), or may be capabilities for each duplexing method (for example, Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0181] If the above conditions are not met, the UE / BS may follow the behavior specified in existing 3GPP releases.

[0182] (Addendum) The following inventions are added regarding one embodiment of the present disclosure. [Appendix 1] a receiver for receiving a configuration regarding a channel state information (CSI) reference resource for a beam report triggered based on a specific event; a control unit that controls the beam reporting based on the setting, A terminal, wherein the CSI reference resource is defined for a candidate cell for L1L2-triggered mobility (LTM). [Appendix 2] The terminal according to Supplementary Note 1, wherein the definition of the CSI reference resource for the candidate cell for the LTM is applied in a specific reporting type. [Appendix 3] 3. The terminal according to claim 1, wherein candidate values ​​of the parameter to be used as slot positions of the CSI reference resources are determined according to specific conditions. [Appendix 4] The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein the definition of the CSI reference resource for the candidate cell for the LTM is applied for a specific purpose or use.

[0183] (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.

[0184] 3 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present disclosure. 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).

[0185] 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.

[0186] 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.

[0187] 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))).

[0188] 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 arranged within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A terminal 20 may be located within at least one of the cells. The arrangement, number, shape, size, etc. of each cell and 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.

[0189] 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.

[0190] The terminal 20 may be connected to at least one of the multiple base stations 10. The terminal 20 may use at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0191] 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.

[0192] Furthermore, the terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

[0193] 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.

[0194] 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, 5GC), a Next Generation Core (NGC), and the like.

[0195] The core network 30 may include network functions (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 Operation, Administration and Maintenance (Management) (OAM). Note that a single network node (which may simply be referred to as a node) may provide multiple functions. Furthermore, communication with an external network (e.g., the Internet) may be performed via the DN.

[0196] The terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0197] 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 uplink (UL).

[0198] 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.

[0199] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each 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.

[0200] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each 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.

[0201] 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).

[0202] 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.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] 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.

[0210] 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).

[0211] (base station) 4 is a diagram illustrating an example of the configuration of a base station according to an embodiment of the present disclosure. 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.

[0212] 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.

[0213] 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.

[0214] 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.

[0215] 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.

[0216] 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.

[0217] 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.

[0218] 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.

[0219] 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.

[0220] 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.

[0221] 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.

[0222] 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 .

[0223] 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 .

[0224] 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.

[0225] 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.

[0226] 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 terminal 20.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] The transceiver 120 may transmit a configuration regarding a channel state information (CSI) reference resource for a beam report triggered based on a specific event. The control unit 110 may control reception of the beam report transmitted from the terminal based on the configuration. The CSI reference resource may be defined for a candidate cell for L1L2-triggered mobility (LTM).

[0231] Furthermore, in the present disclosure, a network device (for example, an LMF node) having the functionality of any of the above-described NFs may be a device having the configuration (for example, the control unit 110 and the transceiver unit 120) of the base station 10 in the same manner as in Fig. 4. In other words, in the description of Fig. 4, by replacing the base station with the network device, the configuration of the network device according to an embodiment of the present disclosure may be covered.

[0232] (Terminal) 5 is a diagram illustrating an example of the configuration of a terminal according to an embodiment of the present disclosure. The terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the terminal may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0233] In this example, functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0234] The control unit 210 performs overall control of the 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.

[0235] 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.

[0236] 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.

[0237] 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.

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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.

[0243] 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.

[0244] 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.

[0245] 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.

[0246] 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.

[0247] 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.

[0248] 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.

[0249] The transmitting section and receiving section of the 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.

[0250] The control unit 210 may perform at least part of the processing of the control unit in the above appendix.

[0251] The transceiver unit 220 may perform at least part of the processing of the transmitter / receiver unit in the above appendix.

[0252] When PUCCH format 0 / 1 is used, the scheduling request (SR) multiplexed with HARQ-ACK information and the first PUCCH multiplexed with HARQ-ACK information do not need to be distinguished. When PUCCH format 2 / 3 / 4 is used, the SR multiplexed with HARQ-ACK information and the first PUCCH multiplexed with HARQ-ACK information may be distinguished.

[0253] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by hardware, software, or a combination of these. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using a single device that is physically or logically coupled, or may be realized by using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or the multiple devices with software.

[0254] For example, a base station, a terminal, a network node, 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. 6 is a diagram illustrating an example of the hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. The above-described base station 10 and 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.

[0255] In the present disclosure, any two terms selected from a set of terms such as apparatus, circuit, device, section, unit, module, chip, means, etc. may be read as interchangeable. The hardware configurations of the base station 10 and the 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.

[0256] Each function in the base station 10 and the terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as the processor 1001 and the memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control the reading, writing, or both reading and writing of data in the memory 1002 and the storage 1003.

[0257] 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), transceiver unit 120 (220), etc. may be realized by the processor 1001. Although only one processor 1001 is shown in the figure, there may be multiple processors.

[0258] The processor 1001 also reads programs (program codes), software modules, data, etc. from the storage 1003, the communication device 1004, or both 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.

[0259] The various processes described above may be performed by one processor 1001, or may be performed by two or more processors 1001 simultaneously, sequentially, or using other techniques. The processor 1001 may be implemented by one or more chips. The program may be transmitted from a network via a telecommunications line, or may be provided to the computer device via, for example, the communication device 1004.

[0260] The present disclosure also provides a computer program product including a computer program, which may implement the steps of the methods described in the above embodiments when the computer program is executed by a computer (e.g., the processor 1001).

[0261] The memory 1002 is a non-transitory computer-readable recording medium and may be configured, for example, by a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically EEPROM (EEPROM), a random access memory (RAM), or a combination of at least two of these. 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 one embodiment of the present disclosure.

[0262] Storage 1003 is a non-transitory computer-readable recording medium, and may be, for example, a flexible disk, a floppy disk, an optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a magneto-optical disk, a removable disk, a hard disk drive, a smart card, a flash memory (e.g., a card, stick, key drive), a magnetic stripe, or the like, or a combination of at least two of these. Storage 1003 may also be referred to as a secondary storage device.

[0263] The above-mentioned recording medium may be, for example, the memory 1002, the storage 1003, or a database including both the memory 1002 and the storage 1003, a server, or other suitable medium.

[0264] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via a wired network, a wireless network, or both a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., or a combination of at least two of these. 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.

[0265] The input device 1005 is an input device that accepts input from the outside (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc., or a combination of at least two of these). The output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc., or a combination of at least two of these). Note that the input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0266] 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.

[0267] Furthermore, base station 10 and 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), a field programmable gate array (FPGA), a graphics processing unit (GPU), a neural processing unit (NPU), or a combination of at least two of these, and some or all of the functional blocks may be realized using such hardware. For example, processor 1001 may be implemented using at least one of these hardware elements.

[0268] In this disclosure, the term "processor" may encompass a single processor or a group of multiple processors, including, for example, a single-core processor, a multi-core processor, multiple processors in a single device, multiple processors in wired or wireless communication with each other, etc. Similarly, the term "(non-transitory) computer-readable storage medium" may encompass a single storage medium or a group of multiple storage media, including multiple storage media in wired or wireless communication with each other.

[0269] Devices such as processors and storage media in the present disclosure may be distributed locally or remotely, and may perform the processing of the devices by operating cooperatively or independently using a bus, network, the Internet, the cloud, etc.

[0270] 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.

[0271] (Variation) Each aspect / embodiment described in the present disclosure may be a mobile communication system other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), International Mobile Telecommunications-Advanced (IMT-Advanced), 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G-Advanced (5G-A), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or a decimal number)), Future Radio Access (FRA), New Radio (NR), New radio access (NX), Future generation radio access (FX), Open Radio Access Network (Open RAN (O-RAN)), Wideband Code Division Multiple Access (W-CDMA (registered trademark)), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.11x (where x is any character string such as b, a, g, n, ac, ax, be, or bn, and when x = n, it is called Wi-Fi 4, when x = ac, it is called Wi-Fi 5, when x = ax, it is called Wi-Fi 6 or Wi-Fi 6E, when x = be, it is called Wi-Fi 7, and when x = bn, it is called Wi-Fi 8.Note that the present disclosure may be applied to systems based on technologies such as Wi-Fi (a registered trademark), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), network virtualization technologies (e.g., Network Function Virtualization (NFV), Service Function Chaining (SFC), Software Defined Networking (SDN)), or Low Power Wide Area (LPWA). Furthermore, each aspect / embodiment described in the present disclosure may be applied to a system based on a combination of at least two of these technologies. Here, "based on" naturally refers not only to a system that uses the technology in question, but also to a system that uses an extension or modification of the technology.

[0272] In the present disclosure, any two terms selected from a set of terms such as "Base Station (BS)", "Radio Base Station", "Fixed Station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "Access Point (AP)", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "Radio Unit (RU)", "Remote Unit (RU)", "Control Unit (CU)", "Distributed Unit (DU)", "Remote Radio Head (RRH)", "node", "gateway", "terrestrial base station", "stratospheric base station", "unmanned aerial vehicle", "High Altitude Platform Station (HAPS)", "airborne platform", "panel", "cell", "Radio Access Network (RAN)", "network", etc. may be used interchangeably. Each cell accommodated by a base station may be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, a serving cell, a super cell, etc. In the present disclosure, any two terms selected from a set of terms such as "cell," "sector," "cell group," "carrier," "component carrier," "cluster," "bandwidth part (BWP)," and "carrier bandwidth" may be used interchangeably.

[0273] In the present disclosure, any two terms selected from the set of terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "Device", "Module", "Terminal", etc. may be used interchangeably.

[0274] A terminal may 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, router (e.g., home router, mobile router, etc.), Telematics Control Unit (TCU), or some other suitable terminology.

[0275] The base station and the terminal may each be composed of one or more devices. The devices constituting at least a part of the base station and the terminal may be called a transmitting device, a receiving device, a [wireless] communication device, etc. In addition, the devices constituting at least a portion of each of the base stations and terminals may be objects themselves, such as 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, unmanned aerial vehicles, stratospheric base stations (e.g., High Altitude Platform Stations (HAPS)), artificial satellites (e.g., Low Earth Orbit (LEO) satellites, Middle Earth Orbit (MEO) satellites, Geostationary Earth Orbit (GEO) satellites), drones (registered trademark), multicopters, quadcopters, balloons, Internet of Things (IoT) equipment (e.g., smart meters, sensors), etc., or may include, but are not limited to, objects or devices mounted on such objects. Furthermore, the object may be a moving object (hereinafter referred to as a "moving object"; this does not exclude the case where the moving object is stationary and not moving), or may be a fixedly positioned object (hereinafter referred to as a "non-moving object").

[0276] Furthermore, a base station in the present disclosure may be read as a 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 terminal is replaced with communication between multiple terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)) or communication in a non-terrestrial network (Non-Terrestrial Network (NTN)). In this case, the 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 communication between terminals (for example, "sidelink") or terms corresponding to NTN (for example, feeder link, service link). For example, terms such as uplink channel and downlink channel may be read as sidelink channel.

[0277] The present disclosure is also applicable to cases where at least some of the devices constituting the base station and the terminal operate outside the earth (for example, in the atmosphere or outer space).

[0278] Similarly, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station 10 may be configured to have the functions of the terminal 20 described above.

[0279] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node or by some of its upper nodes (e.g., CU, RU, DU, etc.) in some cases. It is clear that various operations performed for communication with a terminal in a RAN or core network may be performed by at least some of the base station and other network nodes other than the base station. The other network node may be one node or a combination of multiple nodes. The network node is, for example, a node provided in various core networks such as an Evolved Packet Core (EPC) or a 5G Core Network (5GCN, 5GC), and provides one or more network functions (Network Functions (NFs)), but is not limited to these.

[0280] Furthermore, in the present disclosure, the operation of "a terminal receives information from a base station" accompanies the operation of "the base station transmits the information to the terminal," "the base station generates the information," or both. Similarly, the operation of "a terminal transmits information to a base station" accompanies the operation of "the base station receives the information from the terminal." Furthermore, operations such as "a terminal is configured to ..." or "configure UE to ..." may include the operation of "a base station transmits configuration information regarding the configuration of the terminal" or "a terminal configures a predetermined operation based on the configuration information."

[0281] The notification of information is not limited to the aspects / embodiments described in the present disclosure and may be performed using other methods. For example, the 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 of at least two of them.

[0282] The physical layer signaling may be referred to as Layer 1 (L1) control information. The MAC signaling may be referred to as, for example, a MAC Control Element (CE) or a MAC Protocol Data Unit (PDU). The RRC signaling may be referred to as an RRC message or an information element (IE) in the RRC message. The RRC signaling may be, for example, a message used for controlling an RRC connection (e.g., setup, reconfiguration, establishment, reestablishment, release, or resume), mobility, a measurement report, notification of terminal capabilities, or an information element in the message.

[0283] Furthermore, notification of information may be either explicit or implicit. Note that an explicit notification of certain information means notification of the certain information itself, and an implicit notification of certain information may mean notification of information other than the certain information, or the certain information being deemed to have been notified when a certain condition is met.

[0284] Furthermore, notification of information may include not only notification between the same layers of different devices (for example, between a lower layer or an upper layer of the base station 10 and the terminal 20) but also notification between different layers in the same or different devices (for example, between a lower layer and an upper layer in the base station 10 or the terminal 20). Furthermore, notification of information from one device to another device may be performed via one or more devices.

[0285] With respect to any information (e.g., variables, constants, parameters, settings) described in the present disclosure, even if not specifically stated in the above embodiments, any first device (e.g., terminal / base station) may notify any second device (e.g., base station / terminal) of information indicating / identifying (or relating to) the value of the any information.

[0286] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed as long as it is consistent. For example, the methods described in this disclosure present various step elements using an exemplary order and are not limited to the particular order presented. Furthermore, at least one step may be omitted in the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure.

[0287] 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.

[0288] In the present disclosure, a radio resource may be defined by a combination of resource units in one or more domains, such as the time domain, the frequency domain, the spatial domain, the code domain, and the power domain.

[0289] For example, a resource in the time domain (which may be referred to as a time resource) may be defined by one or more time units. The one or more time units may include, but are not limited to, a radio frame, a subframe, a slot, a symbol, a transmission time interval (TTI), or a combination of at least two of these. Furthermore, the time unit may be a fixed-length time unit that is independent of numerology, a variable-length time unit that is dependent on numerology, or both.

[0290] Examples of fixed-length time units include, but are not limited to, subframes each consisting of one or more slots and radio frames each including multiple subframes. Examples of variable-length time units include, but are not limited to, symbols and slots each including a fixed number of symbols. A certain time unit may be divided into time units shorter than the certain time unit. Examples of such shorter time units include, but are not limited to, minislots each consisting of fewer symbols than the number of symbols that make up a slot. The above-described time units may include time units used as units for scheduling, link adaptation, and the like. Any time unit in the present disclosure may be interchangeable with another time unit.

[0291] Numerology is a parameter that defines the physical layer structure, and may be a parameter based on at least one of the subcarrier spacing (SCS), the symbol length, the cyclic prefix length, and the sampling time, for example.

[0292] A resource in the frequency domain (which may also be referred to as a frequency resource) may be defined by, for example, one or more frequency units. The one or more frequency units may include, for example, a subcarrier, a resource block (RB), a bandwidth part (BWP), a carrier bandwidth, or a combination of at least two of these, but the name of the frequency unit is not limited to these. Furthermore, the number of subcarriers included in a certain frequency unit may be a fixed number regardless of numerology, or may be a variable number that changes depending on numerology.

[0293] For example, an RB is composed of a predetermined number of consecutive subcarriers in the frequency domain, and the number of subcarriers included in the RB may be the same regardless of numerology, for example, 12, but is not limited to this. Also, a BWP may be composed of, for example, one or more consecutive RBs within a certain carrier bandwidth, but is not limited to this. One or more BWPs may be configured within one carrier for terminal 20, and at least one of the BWPs may be activated. Also, any frequency unit in the present disclosure may be interpreted as another frequency unit.

[0294] Furthermore, resources in both the time domain and the frequency domain may be defined by one or more time / frequency units each consisting of a time unit and a frequency unit, such as, but not limited to, a resource element (RE) consisting of one symbol and one subcarrier, a resource element group (REG) consisting of a predetermined number of REs, or a control resource set (CORESET) consisting of a predetermined number of symbols and a predetermined number of RBs.

[0295] The resources in the spatial domain (which may also be referred to as spatial resources) may be defined, for example, by one or more spatial units, including, but not limited to, beams, layers of Multi-Input Multi-Output (MIMO), antenna ports, etc., or a combination of at least two of them.

[0296] The resource in the code domain (which may also be referred to as a code resource) may be defined by, for example, one or more code units, including, but not limited to, a Cyclic Shift (CS), an Orthogonal Cover Code (OCC), or a combination thereof.

[0297] 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.

[0298] In the present disclosure, terms such as "decide," "determine," "judge," "select," "specify," "compute," "calculate," "process," "derive," "look up / search / inquiry," "confirm," "assume," "expect," and "consider" may be read interchangeably. Also, in the present disclosure, performing a certain process (e.g., sending, receiving) may be read interchangeably as deciding to perform that process. Also, in the present disclosure, "not expected to do..." may be read interchangeably as "assumed not to do...."

[0299] 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).

[0300] 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").

[0301] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0302] 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.

[0303] 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.

[0304] 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 relation information," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "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.

[0305] In the present disclosure, an 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, a resource may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource). Furthermore, the spatial domain filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0306] In the present disclosure, beam, sounding reference signal (SRS) resource indicator (SRS Resource Indicator (SRI)), control resource set (CONTROLLER RESOLUTION SET (CORESET)), CORESET pool, uplink shared channel (Physical Downlink Shared Channel (PDSCH)), uplink shared channel (Physical Uplink Shared Channel (PUSCH)), codeword (CW), transport block (TB), reference signal (RS), etc. may be interpreted as interchangeable.

[0307] In the present disclosure, the terms TCI state, TCI, downlink TCI state (Downlink (DL) TCI state), uplink TCI state (Uplink (UL) TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0308] 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.

[0309] In this disclosure, terms such as index, identifier (ID), identity (ID), indicator, indication, resource ID, etc. may be interchangeable. In this disclosure, terms such as sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0310] In the present disclosure, a group may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, an RS group, a CORESET group, a Physical Uplink Control Channel (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.

[0311] Information in this disclosure (e.g., variables, constants, parameters, settings) may be interchangeably read as the ID of the information. For example, TCI state and TCI state ID may be interchangeably read as the ID of the information. Also, information in this disclosure may be interchangeably read as "a set of the information," "one or more pieces of the information," etc.

[0312] Any signal / channel (e.g., PUCCH) in the present disclosure may be interchangeably read as another signal / channel (e.g., PUSCH, PDSCH, any RS). A signal / channel may be interchangeably read as a signal / channel for the same direction (e.g., UL if the certain signal / channel is in the UL direction, and DL if in the DL direction), or as a signal / channel for another direction (e.g., DL if the certain signal / channel is in the UL direction, and UL if in the DL direction). Also, in the present disclosure, descriptions related to DL communication and descriptions related to UL communication may be interchangeably read. In this case, DL (UL) operation may be interchangeably read as the corresponding UL (DL) operation. For example, reception of a PDSCH in a terminal may be interchangeably read as transmission of a PUSCH in the terminal.

[0313] In the present disclosure, terms such as "X's number," "X number," "the number of X(s)," and "a number of X(s)" may be interchangeable. Note that X here may be replaced with an appropriate expression such as a noun, a gerund, or an ordinary sentence, depending on the context. In the present disclosure, "number" may be interchangeable with terms such as maximum number, minimum number, average number, and total number. In addition, in the present disclosure, terms such as "value," "index," "number," and "quantity" may be interchangeable with each other.

[0314] Values / ranges in this disclosure may be interpreted as approximations, as if the words "about" or "approximately" were preceding the value / range. In this disclosure, "A and B are the same" (A and B are any words) may mean "A and B are identical," "A and B are almost the same," "A and B are partly the same (or partially overlapped)," "There is an error within a certain range between A and B," etc. (i.e., these words may be read interchangeably). Furthermore, in the present disclosure, A and B being the same may mean that at least part of A and at least part of B are the same (or overlapped).

[0315] In this disclosure, the terms "one embodiment," "some embodiments," "another embodiment," etc. may be used interchangeably. The appearances of phrases such as "one embodiment," "some embodiments," "another embodiment," etc. in this disclosure do not necessarily all refer to the same embodiment, nor are they necessarily meant to be mutually exclusive.

[0316] In the present disclosure, expressions such as "at least one of A and B," "at least one of A or B," "A and / or B," and "A / B" may be read interchangeably, and may be understood to include "only A," "only B," or "both A and B." Furthermore, in this disclosure, expressions such as "at least one of A, B, and C," "at least one of A, B, or C," "A, B and / or C," and "A / B / C" may be interpreted interchangeably and may be understood to include "only A," "only B," "only C," "A and B," "B and C," "C and A," or "all of A, B, and C." Note that similar interpretations / interpretations may be applied to any expression in this disclosure such as "at least X of ..." (where the number of elements in "..." and X are each any number).

[0317] In the present disclosure, expressions such as "A, [and] B, and the like" / "such as A [and] B"), "A, [or] B, or the like" / "such as A [or] B"), "A, B, etc." / "A, B, and so on" / "A, B, and so forth"," and "A, B, [and / or] the others" may be read interchangeably.

[0318] In the present disclosure, expressions representing one / single X (e.g., "a X," "one X," "a single X"), expressions representing one or more X (e.g., "one or more X(s)," "at least one of X(s)"), and expressions representing a plurality of X (e.g., "Xs," "more than one X(s)," "multiple X(s)," "a plurarity of X(s)") may be read interchangeably. Note that these expressions may also be read interchangeably with expressions that include specific wording (e.g., when X is an uncountable noun, "pieces of," "amount of," etc.). For example, "a plurality of pieces of spatial relation information" may be read interchangeably as "a plurality of spatial relation information."

[0319] The present disclosure has been described above, but it is for illustrative purposes only, and the present invention is not limited to the aspects / embodiments described in the present disclosure. The present disclosure can be implemented in modified and altered forms without departing from the spirit of the invention. The present disclosure and its modifications and alterations are included in the scope of the present invention and its equivalents.

Claims

1. a receiver for receiving a configuration regarding a channel state information (CSI) reference resource for a beam report triggered based on a specific event; a control unit that controls the beam reporting based on the setting, A terminal, wherein the CSI reference resource is defined for a candidate cell for L1L2-triggered mobility (LTM).

2. The terminal of claim 1 , wherein a definition of the CSI reference resource for the candidate cell for the LTM is applied in a specific report type.

3. The terminal according to claim 1 , wherein candidate values ​​of a parameter for setting a slot position of the CSI reference resource are determined according to a specific condition.

4. The terminal according to claim 1 , wherein the definition of the CSI reference resource for the candidate cell for the LTM is applied for a specific purpose or use.

5. receiving a configuration regarding channel state information (CSI) reference resources for beam reporting triggered based on a specific event; and controlling the beam reporting based on the setting. The wireless communication method for a terminal, wherein the CSI reference resource is defined for a candidate cell for L1L2-triggered mobility (LTM).

6. a transmitter for transmitting a configuration regarding a channel state information (CSI) reference resource for a beam report triggered based on a specific event; a control unit that controls reception of the beam report transmitted from the terminal based on the setting, A base station, wherein the CSI reference resource is defined for a candidate cell for L1L2-triggered mobility (LTM).

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