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 a cell switching command; a transmission section that reports capability information related to channel state information (CSI) measurement before the reception of the cell switching command; and a control section that controls the start of the CSI measurement on the basis of whether to report the capability information. The control section determines effectiveness of a result of CSI measurement on the basis of a specific condition.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

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

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later) are also being considered. [Prior art documents] [Non-patent literature]

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

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

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

[0007] However, there are cases where sufficient consideration has not been given to CSI measurement / reporting for mobility. 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 cell switch command, a transmitting unit that reports capability information related to channel state information (CSI) measurement before receiving the cell switch command, and a control unit that controls the start of the CSI measurement based on whether or not to report the capability information, and the control unit determines the validity of the CSI measurement result based on specific conditions. [Effects of the Invention]

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

[0011] [Figure 1] Fig. 1A is a diagram showing an example of UE movement in Rel. 17. Fig. 1B is a diagram showing an example of UE movement in Rel. 18. [Figure 2] FIG. 2 is a diagram illustrating an example of a trigger state instruction. [Figure 3] FIG. 3 is a diagram illustrating an example of determining the validity of a CSI measurement result according to the first embodiment. [Figure 4] FIG. 4 is a diagram illustrating an example of determining the validity of a CSI measurement result according to the second embodiment. [Figure 5] 5A and 5B are diagrams illustrating the correspondence between subcarrier spacing and specific symbols regarding CSI calculation time in existing specifications. [Figure 6] FIG. 6 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 7] FIG. 7 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 8] FIG. 8 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 9] FIG. 9 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. [Figure 10] FIG. 10 is a diagram illustrating an example of a vehicle according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] (L1 / L2 inter-cell mobility) The UE may perform UL transmission to one or more cells / TRPs. The following scenario 1 or scenario 2 may be considered as a procedure in this case. In the present disclosure, the serving cell may be replaced with the TRP in the serving cell. Layer 1 / layer 2 (L1 / L2) and DCI / Medium Access Control Control Element (MAC CE) may be replaced with each other. In the present disclosure, a physical cell identity (PCI) different from the physical cell identity (PCI) of the current serving cell may be simply referred to as a "different PCI." A non-serving cell, a cell having a different PCI, and an additional cell may be replaced with each other.

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

[0014] (1) The UE receives from the serving cell the configuration necessary to use radio resources for data transmission and reception, including SSB configuration for beam measurement of a TRP corresponding to a PCI different from that of the serving cell, and resources of the different PCI. (2) The UE performs beam measurement of the TRPs corresponding to different PCIs and reports the beam measurement results to the serving cell. (3) Based on the above report, the Transmission Configuration Indication (TCI) states associated with the TRPs corresponding to different PCIs are activated by L1 / L2 signaling from the serving cell. (4) The UE transmits and receives using UE-dedicated channels on TRPs corresponding to different PCIs. (5) The UE must always cover the serving cell, including in the case of multiple TRPs. As in conventional systems, the UE must use common channels from the serving cell, such as the Broadcast Control Channel (BCCH) and the Paging Channel (PCH).

[0015] In Scenario 1, when the UE transmits and receives signals to and from an additional cell / TRP (a TRP corresponding to the PCI of the additional cell), the serving cell (the serving cell assumed by the UE) is not changed. The UE is configured with higher layer parameters related to the PCI of non-serving cells from the serving cell. Scenario 1 may be applied, for example, in Rel. 17.

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

[0017] An additional cell is a cell with an additional PCI that is different from the PCI of the serving cell. The UE can receive / transmit UE-dedicated channels from the additional cell. The UE needs to be within the coverage of the serving cell to receive UE common channels (e.g., system information / paging / short messages). When the UE moves out of the coverage of the serving cell, a cell change is required, for example, by handover (also known as L3 mobility).

[0018] <Scenario 2> In scenario 2, L1 / L2 inter-cell mobility is applied. With L1 / L2 inter-cell mobility, the serving cell can be changed using functions such as beam control without RRC reconfiguration. In other words, transmission and reception with an additional cell is possible without handover. Since handover requires RRC reconnection and creates a period when data communication is unavailable, by applying L1 / L2 inter-cell mobility that does not require handover, data communication can be continued even when the serving cell is changed. Scenario 2 may be applied in Rel. 18, for example. In scenario 2, for example, the following procedure is performed.

[0019] (1) The UE receives from the serving cell the SSB configuration of a cell (additional cell) with a different PCI for beam measurement / serving cell change. (2) The UE performs beam measurements of cells using different PCIs and reports the measurement results to the serving cell. (3) The UE may receive 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 (assumed serving cell) and starts receiving / transmitting using the pre-configured UE-specific channel and TCI state.

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

[0021] FIG. 1B is a diagram showing an example of 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 / send UE-dedicated channels / common channels with a new serving cell (or a 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, the L1-RSRP / SINR report 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] In the L1-RSRP report, when the higher layer parameter nrofReportedRS (e.g., within CSI-ReportConfig) is set to 1, 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.

[0026] 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 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, referring to the maximum measured value that is part of the same L1-RSRP reporting instance.

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

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

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

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

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

[0033] In the present disclosure, the Rel.15 / 16 intra-cell beam reporting (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 that of the serving cell. For example, when a non-serving cell has a larger RSRP than the serving cell, the UE can transmit and receive UL / DL channels / signals with the non-serving cell without performing a handover.

[0035] In 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 referred to as type 2 beam reporting (beam reporting type 2). The type 2 beam reporting can be further classified into type 2-1 and 2-2 described later.

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

[0039] <Inter-cell beam reporting in Rel.18> Furthermore, only SSB-based L1-RSRP reporting (beam reporting) is supported for beam reporting in Rel. 18. Here, the number of candidate cells L may be any value between 1 and 4, and the number of beams M per cell may be any value between 1 and 4. For example, in beam reporting, a 7-bit absolute value (the largest L1-RSRP value among all cells) is reported for one cell, and all remaining L1-RSRP values ​​are reported as differential values.

[0040] Regarding beam selection in SSB-based L1-RSRP reporting, the maximum value of M*L configurable by RRC for the above-mentioned M and L, and the combination of M and L may vary depending on the UE capabilities.

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

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

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

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

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

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

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

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

[0049] The UEIBR considers that the report content will include at least one of the following information in the beam report: Beam / reference signal index (e.g., CSI-RS / SSB resource index / indicator). Measurement results (e.g., L1-RSRP / SINR (absolute value / relative value)). · Number of beams / RS reported. · Whether the serving beam is included in the beam reporting.

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

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

[0052] In this case, the UCI may be coded in two parts. For example, the size of the second part of the UCI may be indicated by the first part of the UCI (which may have a fixed size).

[0053] Events related to UEIBR (as mentioned above) may be broadly categorized into the following event types: Event 1: The quality of the current beam becomes worse than a certain threshold. Event 2: The quality of at least one new beam (e.g., L1-RSRP) becomes better than a certain threshold compared to the quality of the current beam. Event 3: The quality of the new beam is better than a certain threshold. Event 4: The quality of the current beam becomes worse than a first threshold and the quality of at least one new beam becomes better than a second threshold. Event 5: The absolute value of the difference between the quality of the current beam and the quality of at least one new beam falls below a certain threshold. Event 6: The current beam is no longer among the best K (more than 1: K>1) beams (among those configured for measurement / reporting). Event 7: The quality of at least one new beam (e.g., L1-RSRP) becomes better than the RS derived from the best quality activated (active) TCI state up to Mth (M >= 1, M may be configured by RRC) by more than a threshold. Event 8: The quality (e.g., L1-RSRP) of M (more than 1: M>1) new beams becomes better than the current beam by more than a threshold. Event 9: The quality of at least one new beam (e.g. L1-RSRP) becomes better than the configured reference RS (which may be SSB / CSI-RS) by more than a threshold.

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

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

[0056] (UCI-based UEIBR) In the UCI-based UEIBR procedure, the following modes may be supported:

[0057] <<Mode A>> Mode A relates to dynamic scheduling of UCI by the NW (gNB). That is, in Mode A, resources for UCI are scheduled by the gNB. Mode A may be a basic function of the UE (a UE that supports UE-IBR may naturally support this function).

[0058] Step 1: The UE transmits a first UL channel (e.g., PUCCH), which is an UL channel that notifies / requests a second UL channel (e.g., PUCCH) for transmitting a beam report, and may consist of one or more bits.

[0059] Step 2: The UE detects the DCI format indicating the second UL channel resource.

[0060] Step 3: The UE transmits a beam report using resources (UCI) on the second UL channel.

[0061] For mode A, at least a one-bit indication in the first UL channel (PUCCH) may be supported to request resources in the second UL channel for transmitting a beam report.

[0062] In this case, periodic PUCCH resources (PUCCH format 0 / 1) may be configured by dedicated higher layer signaling.

[0063] <<Mode B>> Mode B relates to UCI within pre-configured resources for the second UL channel.

[0064] Step 1: The UE transmits a first UL channel (e.g., PUCCH). The first UL channel is an UL channel that indicates a second UL channel for transmitting a beam report, and may be configured with one or more bits. The first UL channel may be configured with one or more bits.

[0065] Step 2: The UE transmits a beam report in the second UL channel (eg, using a specific resource (UCI) within the channel).

[0066] Note that the notification in step 1 may be included in a separate reporting instance from the beam report in step 2.

[0067] For Mode B, at least a one-bit indication in the first UL channel (PUCCH) may be supported to indicate that the second UL channel is used to transmit a beam report.

[0068] In this case, periodic PUCCH resources (PUCCH format 0 / 1) may be configured by dedicated higher layer signaling.

[0069] In either of the above-mentioned modes A / B, cross-CC (component carrier) beam reporting may be supported.

[0070] The pre-configured resource for the second UL channel in step 2 of Mode B may be at least a CG PUSCH (eg, a Type 1 CG PUSCH).

[0071] The CG PUSCH may carry UL data (UL-SCH) and beam reports.

[0072] In addition, the CG PUSCH may be a CG PUSCH specific to transmitting beam reports (and may not transmit UL data / other UCI).

[0073] Furthermore, use of PUCCH and PUSCH with / without UL data as the second UL channel is being considered.

[0074] (Considerations for measurement reports) CSI-RS-based L1-RSRP measurements are supported. Additionally, support for CSI-RS-based L1-SINR measurements is under consideration.

[0075] Explicit configuration of CSI-RS resources for candidate cells for L1 measurements is supported.

[0076] CSI-RS based L1-RSRP reporting is supported for gNB scheduled measurement reporting. Additionally, support for CSI-RS based L1-SINR reporting is under consideration for gNB scheduled measurement reporting.

[0077] The Rel.18 CSI reporting framework for LTM can serve as a baseline for gNB-scheduled CSI-RS-based L1 measurement reports.

[0078] SSB-based / CSI-RS-based L1-RSRP measurements are supported for event-triggered reporting. Additionally, support for L1-SINR measurements for event-triggered reporting is under consideration.

[0079] (Event-triggered beam reporting for mobility) The above-mentioned UEIBR (Event Triggered Beam Report) can also be extended for mobility.

[0080] 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).

[0081] 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.

[0082] (Various settings in the Rel.18 CSI reporting framework for LTM) In Rel.18 LTM CSI reporting configuration, the resource configuration includes a list of candidate IDs that are one-to-one mapped to a list of SSB indices. In Rel.18 LTM, only SSB-based L1-RSRP is supported.

[0083] In Rel.18 LTM, the configuration of CSI-RS resources / resource sets may be provided under parameters (LTM-TCI-Info) for one LTM candidate ID.

[0084] The configuration of the NZP CSI-RS resource set follows the rules of Rel. 17 and has resource set-specific parameters.

[0085] (MAC CE based event-triggered beam reporting for mobility) Regarding L1 measurement reports, the use of MAC CE is being considered.

[0086] For example, an event-triggered L1 measurement may be reported from the UE to the network (NW) via the MAC CE.

[0087] Regarding existing resource allocation, the following is specified:

[0088] The logical channels may be prioritized according to the following order (highest priority may be placed first): ·MAC CE for C-RNTI or data from the Uplink Common Control Channel (UL-CCCH). · [Extended] MAC CE for Beam Failure Recovery (BFR), or MAC CE for Configuration Grant (CG) confirmation, or MAC CE for multiple entry CG confirmation. · MAC CE for checking side link (SL) CG. ·MAC CE for LBT (Listen Before Talk) failure. ·MAC CE for SL LBT failure according to specific provisions. ·MAC CE for timing advance reporting. MAC CE for Buffer Status Report (BSR) included for padding. MAC CE for SL-BSR included for padding.

[0089] Note that prioritization between MAC CEs with the same priority may be up to the UE implementation.

[0090] (CSI trigger state) 2 is a diagram illustrating an example of a trigger state indication. In the present disclosure, the trigger state, the CSI trigger state, and the CSI reporting trigger state may be read interchangeably.

[0091] The trigger state (trigger for CSI reporting) is initiated using the CSI request field in the DCI. If all bits [value] of the CSI request field in the DCI are set to 0, it may mean that no CSI is requested.

[0092] The number of CSI trigger states set in the upper layer parameter CSI-AperiodicTriggerStateList is 2. N TS If the sub-selection indication is greater than 1, the UE may receive a sub-selection indication (e.g., MAC CE) that is a codepoint in the CSI request field in the DCI with up to 2 N TS - may be used to map one trigger condition.

[0093] That is, the MAC CE is configured to receive the trigger signal when the number of trigger conditions is 2. N TS - If greater than 1, then up to 2 for further DCI indication by the CSI request field. N TS This may be used to activate a trigger state.

[0094] where N TS may represent the number of bits in the CSI request field. The CSI request field is variably configured with 0 to 6 bits and is determined by the upper layer parameter reportTriggerSize.

[0095] The number of trigger conditions is up to 2. N TS Each trigger state may correspond to a code point in the CSI request field in the DCI.

[0096] Each trigger state may include multiple (eg, up to 16) reporting configurations (CSI-ReportConfig).

[0097] (analysis) Incidentally, in an operation related to CSI reporting, there is a possibility that the NW does not know whether the UE has already measured the CSI for the target cell at the timing when the UE receives the cell switch command [MAC CE].

[0098] In this case, it is necessary to clarify how the timeline from receiving the cell switch command to transmitting the CSI report is determined (Analysis 1).

[0099] Furthermore, when a cell switch command triggers the CSI reporting of the target cell, the subcarrier spacing of the cell that receives the triggering signal (i.e., the cell switch command [MAC CE]) may be unrelated to the subcarrier spacing determined by existing specifications (Analysis 2).

[0100] As such, there is room for further consideration of future regulations regarding CSI measurement and reporting. Without clear regulations, it may be impossible to achieve lower latency communications, which could hinder improvements in communication quality and throughput.

[0101] Therefore, the present inventors came up with a method for solving these problems.

[0102] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0103] (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.

[0104] 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."

[0105] 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.

[0106] 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.

[0107] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., messages from the core network such as positioning protocol (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP)) messages), or a combination thereof.

[0108] 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.

[0109] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0110] In this disclosure, the terms drop, abort, cancel, puncture, rate match, postpone, do not transmit, etc. may be read interchangeably.

[0111] In the present disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In the present disclosure, the terms sequence, list, set, group, cluster, subset, pool, etc. may be interchangeable.

[0112] In this disclosure, the terms panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmitting entity, Transmission / Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relation, SRS Resource Indicator (SRI), Control Resource Set (CORESET), Physical Downlink Shared Channel (PDSCH), Codeword (CW), Transport Block (TB), Reference Signal (RS), antenna port (e.g., Demodulation Reference Signal (DMRS) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relation group, Code Division Multiplexing (CDM) group, reference signal group, CORESET group, Physical Uplink Control Channel (PUCCH) group, PUCCH resource group), resource (e.g., reference signal resource, SRS resource), resource set (e.g., reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, Quasi-Co-Location (QCL), QCL assumption, etc. may be read as interchangeable.

[0113] In the present disclosure, base station, gNB, and network (NW) may be interpreted as interchangeable.

[0114] 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.

[0115] 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.

[0116] In the present disclosure, [for Rel. 19] event-based beam reporting, event-triggered beam reporting, UE-triggered beam reporting, UE-initiated beam reporting, event-triggered reporting / measurement, and UE-initiated beam management (UEIBM) may be read interchangeably.

[0117] 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.

[0118] In this disclosure, CSI reporting and CSI reporting for LTM in Rel. 18 may be read interchangeably.

[0119] In the present disclosure, beam report, UEIBR, UEIBR report, and simply report may be read interchangeably.

[0120] In the present disclosure, Type 1 beam report and beam report for intra-cell beam switching may be read interchangeably.

[0121] In the present disclosure, Type 2 beam report and inter-cell beam report may be read interchangeably.

[0122] In the present disclosure, Type 2-1 beam report and beam report for inter-cell beam switching may be read interchangeably.

[0123] In the present disclosure, Type 2-2 beam report and beam report for cell switching may be read interchangeably.

[0124] In this disclosure, terms such as table, mapping, association, list, format, content, report, etc. may be read interchangeably.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] In the present disclosure, the number of beams and the number of resources may be read interchangeably.

[0129] 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)).

[0130] In the present disclosure, serving may be interchangeably read as serving beam / serving cell / SpCell.

[0131] In the present disclosure, neighbor may be interchangeably read as a beam / cell other than the serving beam / serving cell / SpCell / SCell.

[0132] 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.

[0133] In the present disclosure, candidate cells, target cells, neighboring cells, cells, etc. may be read interchangeably.

[0134] In the present disclosure, the occurrence of an event and the satisfaction of the conditions for the event may be read interchangeably.

[0135] In this disclosure, beam, RS, and [L1 / L3] measurement results may be interpreted interchangeably.

[0136] In this disclosure, the RS to be measured may be a QCL source RS in an active TCI state / indicated TCI state.

[0137] In the present disclosure, the spatial domain filter, the time domain filter, and the domain filter may be read interchangeably.

[0138] In this disclosure, NW / BS / gNB may be interpreted as interchangeable.

[0139] 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.

[0140] 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.

[0141] In the present disclosure, the number of current beams / new beams may be one or more.

[0142] In the present disclosure, new beam / RS, candidate beam / RS, measurement beam / RS, measurement beam / RS, etc. may be read interchangeably.

[0143] 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).

[0144] Each embodiment of the present disclosure can be applied to any event.

[0145] In the present disclosure, L1-RSRP may be read interchangeably with L1-SINR.

[0146] In the present disclosure, the terms condition and threshold may be interpreted as interchangeable.

[0147] 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.

[0148] In the present disclosure, Mode A and Mode B may be interpreted as interchangeable.

[0149] 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.

[0150] In the present disclosure, UCI and MAC CE may be read interchangeably as containers used in UEIBR.

[0151] 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.

[0152] In this disclosure, "current beam" may mean "current beam of the current serving cell" in mobility.

[0153] 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.

[0154] 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.

[0155] In the present disclosure, multiplexing (multiplexing / being multiplexed) and mapping (mapping / being mapped) may be read interchangeably.

[0156] 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.

[0157] In the present disclosure, the other UL channels [transmitting other UCI], PUCCH, and PUSCH may be read interchangeably.

[0158] 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.

[0159] In the present disclosure, the multiple events may be any of the events described above (or a combination of multiple events).

[0160] 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.

[0161] 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.

[0162] In the present disclosure, the first UL channel may be a PUCCH that signals / requests a second UL channel, and the second UL channel may be, for example, a DG / CG PUSCH.

[0163] (Wireless communication method) The UE may perform / control measurements / reports by applying the present disclosure (the various provisions described above and the following embodiments). The NW / BS / gNB may provide / transmit to the UE settings / instructions, etc., for the UE to realize the measurement / reports control. Furthermore, the NW / BS / gNB may perform various controls necessary to receive the reports (beam reports / CSI reports) from the UE.

[0164] The present disclosure is applicable to each MIMO / mobility use case.

[0165] In the present disclosure, each embodiment / option may be applied alone or in combination with other embodiments / options.

[0166] In the present disclosure, CSI-RS and SSB may be read as interchangeable.

[0167] In the present disclosure, the terms resource, resource set, and list of resources may be read interchangeably.

[0168] In the present disclosure, the channel measurement resource, the interference measurement resource, and the resource may be read interchangeably.

[0169] In the present disclosure, the terms "criteria" and "condition / requirement" may be read interchangeably.

[0170] In the present disclosure, CSI acquisition, CSI measurement, and CSI reporting may be interpreted interchangeably.

[0171] In the present disclosure, the terms predetermined time, predetermined time, duration, shortest time, minimum duration, CSI computation time, CSI processing time, etc. for determining the validity of CSI measurement results may be read interchangeably.

[0172] In the present disclosure, the CSI measurement / reporting is not limited to the case where it is performed after receiving a cell switch command, but can also be applied to the case where it is performed before receiving a cell switch command. In this case, the UE may determine whether the CSI measurement result is valid based on whether the CSI report was transmitted within a predetermined time before receiving the cell switch command.

[0173] Furthermore, the present disclosure is not limited to NW-triggered LTM as a mobility use case, but is also applicable to conditional LTM (CLTM). For example, the condition for performing RACH-less in CLTM may include whether the CSI measurement result is valid. Furthermore, candidate cells that are targets for 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.

[0174] According to the present disclosure, the rules for mobility-oriented CSI measurement / reporting are clarified. A UE can appropriately control mobility-oriented CSI measurement / reporting based on the rules. As a result, communication with lower latency can be achieved, and communication quality / throughput can be improved.

[0175] <0th embodiment> The zeroth embodiment relates to UE capability of CSI measurement timing.

[0176] Regarding the UE capability for CSI measurements before receiving a cell switch command, the following options may apply depending on whether capability information is reported or not.

[0177] In the present disclosure, UE capabilities and capability information may be interpreted as interchangeable.

[0178] <<When capability information is reported>> (Opt1) If a UE reports this capability information, it may mean that the UE is always able to measure the CSI for the target cell before receiving a cell switch command.

[0179] That is, the UE may be expected to always have valid CSI measurements for the target cell at the time of receiving the cell switch command.

[0180] In this case, the UE may be expected to have valid CSI measurements (CSI measurements completed) for all candidate cells (target cells), or may be expected to have valid CSI measurements (CSI measurements completed) for a subset (e.g., X specific) of candidate cells.

[0181] Here, the value of X may be predefined by a specification, may be set / indicated by higher layer signaling / physical layer signaling, or may be determined according to UE capabilities.

[0182] Furthermore, the UE may report / transmit information about which X candidate cells the CSI has been measured for by higher layer signaling (eg, MAC CE) / physical layer signaling (eg, UCI).

[0183] (Opt2) If the UE reports this capability information, it may mean that the UE can start CSI measurements for the target cell before receiving the cell switch command.

[0184] That is, the UE does not always have valid CSI measurement results for the target cell at the time of receiving the cell switch command.

[0185] <<If capability information is not reported>> (Opt3) [Even if] the UE does not report this capability information, [this may mean] that the UE can start CSI measurements for the target cell before receiving the cell switch command (i.e., this may be the same as Opt2).

[0186] That is, the UE does not always have valid CSI measurement results for the target cell at the time of receiving the cell switch command.

[0187] (Opt4) If the UE does not report the capability information, it may mean that the UE cannot start CSI measurements for the target cell before receiving the cell switch command.

[0188] That is, after receiving a cell switch command before the LTM cell switch is completed, the UE may be expected to start CSI measurement of the target cell indicated / specified in the cell switch command.

[0189] According to this embodiment, whether CSI measurement / reporting before receiving a cell switch command is supported or not becomes clear depending on whether capability information is reported or not.

[0190] First Embodiment The first embodiment relates to the validity of the CSI measurements.

[0191] <<Aspect 1-1>> Aspect 1-1 relates to a method for determining the validity of a CSI measurement result. Fig. 3 is a diagram showing an example of determining the validity of a CSI measurement result according to the first embodiment.

[0192] The UE may determine the validity of the CSI measurement results (whether they are valid or not) based on the following options:

[0193] (Opt1) The UE may determine the validity / relevance of the CSI measurement result based on certain conditions, which may be at least one of the following:

[0194] ((Condition #1)) If a certain time / duration has elapsed since the end of the last symbol in the time of the latest periodic / semi-persistent / aperiodic CSI resource, the UE may consider (determine) that the CSI measurement result is invalid (see Figure 3).

[0195] ((Condition #2)) If the CSI measurement is performed within a predetermined time before receiving the cell switch command, the UE may consider (determine) that the CSI measurement result is valid.

[0196] The above-mentioned predetermined time (e.g., Y symbols / slots / milliseconds) may be predefined by a specification, may be set / indicated by higher layer signaling / physical layer signaling, or may be determined according to UE capabilities.

[0197] (Opt2) The UE may consider (may determine) that the CSI measurement result for the target cell is always valid at the time of receiving the cell switch command.

[0198] (Note) For example, if the CSI measurement result for the target cell is (considered / determined to be) invalid at the time of receiving the cell switch command, the UE needs to measure the CSI for the target cell after receiving the cell switch command.

[0199] Alternatively, if the CSI measurement results for the target cell are considered valid at the time of receiving the cell switch command, the UE may report the stored CSI measurement results for the target cell indicated by the cell switch command without CSI measurements.

[0200] That is, in this case (when the CSI measurement result is valid), for a target cell specified in a cell switch command that does not involve CSI measurement (does not trigger CSI measurement), the valid CSI measurement result may be stored and reported.

[0201] <<Aspect 1-2>> Aspect 1-2 relates to a method for identifying the validity of CSI measurement results (on the network side).

[0202] If Opt2 / Opt3 of the 0th embodiment is supported, at least one of the following options may be applied, which allows the NW to properly identify / recognize whether the UE has valid CSI measurement results for the candidate cells indicated by the cell switch command.

[0203] (Opt1) The UE may report / transmit to the NW whether it (the UE) has valid CSI measurement results before receiving a cell switch command.

[0204] For example, a one-bit indication field may be introduced / used for each RS / candidate cell / all candidate cells for the report (indication). In this case, the candidate cell to be measured may be transparent to the network. That is, the candidate cell to be measured may be commonly recognized between the UE and the network in advance.

[0205] This 1-bit indication may be referred to as a CSI measurement validity field, and may be included in L1 measurement reports (e.g., CSI-RS based L1 measurement reports) or in new reporting formats (e.g., UCI / MAC CE).

[0206] The new report format may include, for example, at least one of the following information (content): · DL RS index (e.g. CSI-RS index, CRI). Candidate cell ID. A 1-bit instruction field as described above.

[0207] In addition, the new report format (UCI / MAC CE) may include a field indicating the presence or absence of a 1-bit indication [field] in addition to the above-mentioned contents. Alternatively, the presence or absence of the 1-bit indication [field] may be set by higher layer signaling (RRC).

[0208] Furthermore, the above-mentioned L1 measurement report may be triggered by the NW or by an event.

[0209] (Opt2) The conditions for the NW to determine whether the UE has valid CSI measurement results may be predefined by the specification. Examples of such conditions include:

[0210] ((Condition #1)) Whether a PDCCH ordered RACH for the candidate cell is being performed.

[0211] The UE may expect to obtain CSI measurements for the candidate cells within a predetermined time after transmitting the PRACH or receiving the PDCCH order.

[0212] ((Condition #2)) Whether a specific MAC CE (activation command) for the candidate cell has been received.

[0213] The particular MAC CE may be an activation command to activate the candidate TCI state.

[0214] The UE may expect to obtain CSI measurements for the candidate cell within a predetermined time after receiving the MAC CE or after sending an ACK for the MAC CE.

[0215] ((Condition #3)) Whether L1 measurement reports are being sent.

[0216] The UE may expect to obtain CSI measurement results for a particular candidate cell included in the L1 measurement report within a predetermined time after transmitting the L1 measurement report or after transmitting an ACK for the L1 measurement report (e.g., MAC CE).

[0217] The predetermined time (e.g., Y symbols / slots / milliseconds) in conditions #1 to #3 may be predefined by a specification, may be set / indicated by higher layer signaling / physical layer signaling, or may be determined according to UE capabilities.

[0218] The specific candidate cells in condition #3 may be all candidate cells that may be included in the report, one or more candidate cells with the highest L1-RSRP / SINR, or one or more candidate cells [selected according to a specific rule]. These candidate cells may be explicitly indicated / designated by a candidate cell ID, etc., as shown in Opt1 above.

[0219] (Opt3) The UE may not be expected to inform the NW whether it has valid CSI measurements for the target cell indicated by the cell switch command.

[0220] (Note) The UE may report, in the capability information, the conditions / predetermined time (e.g., Y symbols / slots / milliseconds) for determining the validity of the above-mentioned CSI measurement results.

[0221] Alternatively, the UE may always expect / assume the predetermined time, which will be described in detail in the second embodiment.

[0222] According to this embodiment, the method for determining the validity of the CSI measurement result is clearly defined, and the UE can appropriately determine the validity based on the defined method.

[0223] <Second embodiment> The second embodiment relates to the conditions (predetermined time) for determining the validity of the CSI measurement result.

[0224] <<Aspect 2-1>> The UE may determine the validity (valid or not) of the CSI measurement result based on the following options: Figure 4 is a diagram illustrating an example of determining the validity of the CSI measurement result according to the second embodiment.

[0225] For the above-mentioned predetermined time, at least one of the following options may be applied / considered:

[0226] (Opt1) The predetermined time may mean the minimum time from receiving a cell switch command to transmitting a CSI report (see FIG. 4).

[0227] Note that reception of a cell switching command may be interpreted as transmission of an ACK in response to the cell switching command, and vice versa.

[0228] (Opt2) The predetermined time may refer to the shortest time from receiving the CSI-RS resource to transmitting the CSI report (see FIG. 4).

[0229] The CSI-RS resource may refer to the most recent (last) resource before the cell switch command is received.

[0230] Alternatively, the CSI-RS resource may refer to the first (oldest) resource after receiving the cell switch command (see FIG. 4).

[0231] (Note #1) The aforementioned minimum time may be at least one of the following options:

[0232] ((OptA)) The minimum time may be included in at least one of the RRC processing time and the RS measurement time for LTM, i.e., the minimum time may be treated as at least a part of the RRC processing time / RS measurement time.

[0233] In this case, the CSI reporting configuration in the target cell may be configured outside (outside / external) the candidate [cell] configuration.

[0234] ((OptB)) The minimum time may be added to at least one of the RRC processing time and the RS measurement time for LTM, i.e., the minimum time may be treated as a time separate from the RRC processing time / RS measurement time.

[0235] In this case, the CSI reporting configuration in the target cell may be configured within (inside / interior to) the candidate [cell] configuration.

[0236] The minimum time may be predefined by a specification, may be set / indicated by higher layer signaling / physical layer signaling, or may be determined according to the UE capabilities.

[0237] In the present disclosure, the terms minimum time, minimum duration, predetermined time, and duration may be read interchangeably.

[0238] (Note #2) If Opt1 of the 0th embodiment is supported, the UE may report only Opt1 of the second embodiment as capability information.

[0239] If Opt2 / Opt3 of the 0th embodiment is supported, the UE may report both Opt1 and Opt2 of the 2nd embodiment as capability information. Whether to apply only Opt1 or both Opt1 and Opt2 (combination) may be determined based on whether the UE has valid CSI measurement results for the target cell.

[0240] If Opt4 of the 0th embodiment is supported, the UE may report both Opt1 and Opt2 of the 1st embodiment as capability information.

[0241] (others) In terms of timing for CSI reporting, the following two types of timelines with different durations may be defined:

[0242] ((Type #1)) RRC processing time / MAC CE processing time. This processing time may start after receiving a cell switch command or after sending an ACK for the cell switch command.

[0243] ((Type #2)) CSI calculation time, which may start from the first channel measurement resource (CMR) after receiving a cell switch command.

[0244] Whether these two types of timelines are applied may be related to the start timing of the CSI measurements.

[0245] For example, if the CSI measurement is initiated before the reception of the cell switch command, the Type #2 timeline may not be considered / applied, and in this case, only the Type #1 timeline may be considered / applied.

[0246] Alternatively, if CSI measurement is initiated after receiving a cell switch command (if CSI measurement / reporting is based on aperiodic CMR), both Type #1 / Type #2 timelines may be considered / applied.

[0247] In the present disclosure, the predetermined time (shortest time) T may be calculated by the following formula: T=T LTM-RRC-processing +T LTM-processing +T first-RS +T RS-proc +3msec

[0248] where T LTM-RRC-processing denotes the RRC processing time (reconfiguration time) for LTM, and T LTM-processing denotes the processing time for LTM, and T first-RS denotes the first RS measurement time, and T RS-proc may mean the RS processing time.

[0249] T LTM-RRC-processing and T LTM-processing may be interpreted as the RRC [re]configuration time for LTM. first-RS and T RS-proc may be interchangeably read as beam application time.

[0250] According to this embodiment, the handling of the predetermined time (shortest time) for determining the validity of the CSI measurement result becomes clear, and the UE can appropriately determine the validity of the CSI measurement result based on the predetermined time (condition).

[0251] <Third embodiment> The third embodiment relates to the handling of the subcarrier spacing (SCS) of the cell for which CSI measurement / reporting is triggered.

[0252] As mentioned above, when a cell switch command triggers CSI measurement / reporting for a target cell, the subcarrier spacing of the cell that receives the triggering signal (i.e., the cell switch command [MAC CE]) may be unrelated to the subcarrier spacing determined by existing specifications (regulations regarding the UE's CSI calculation time).

[0253] 5A and 5B are diagrams illustrating the correspondence between subcarrier spacing and specific symbols regarding CSI calculation time in existing specifications.

[0254] For example, in existing specifications, a specific symbol (Z) used to determine the UE's CSI calculation time is determined based on a specific correspondence relationship with the subcarrier spacing μ (see FIGS. 5A and 5B). Figures 5A and 5B are tables showing the specific correspondence relationship between Z and μ, which may be referred to as CSI calculation delay requirements #1 and #2, respectively.

[0255] Therefore, at least one of the following options may be applied to handle the subcarrier spacing of the cell (target cell / candidate cell) when determining the predetermined time (specific symbol):

[0256] (Opt1) Existing specifications (ie, FIGS. 5A and 5B) may be referenced as the correspondence / table for determining the particular symbols.

[0257] In this case, the subcarrier spacing μ in the figure may be determined by the minimum value between μ UL and μ CSI-RS excluding μ PDCCH, i.e., μ = min(μ UL, μ CSI-RS).

[0258] Here, μPDCCH may correspond to the subcarrier spacing of the PDCCH on which the DCI is transmitted, μUL may correspond to the subcarrier spacing of the PUSCH on which the CSI report is transmitted, and μCSI-RS may correspond to the minimum subcarrier spacing of the aperiodic CSI-RS triggered by the DCI.

[0259] (Opt2) A new correspondence relationship / table may be introduced / stipulated as a correspondence relationship / table for determining specific symbols.

[0260] The subcarrier spacing μ to be referred to may be determined by the minimum value among the subcarrier spacings shown below. · The subcarrier spacing of periodic / semi-persistent / aperiodic CSI-RS on the target cell triggered by upper layer signaling (RRC / MAC CE) / physical layer signaling (DCI). · The subcarrier spacing of the PUSCH on which CSI reports are transmitted in the target cell.

[0261] According to this embodiment, the handling of the subcarrier spacing (SCS) of the cell where CSI measurement / reporting is triggered becomes clear.

[0262] <Supplement> <<Notification of Information to UE>> The notification of any information from [the network (Network (NW)) (for example, the base station (Base Station (BS)))] to the UE in the above-described embodiment (in other words, the reception of any information from the BS by the UE) may be performed using physical layer signaling (for example, DCI), upper layer signaling (for example, RRC signaling, MAC CE), a specific signal / channel (for example, PDCCH, PDSCH, reference signal), or a combination thereof.

[0263] When the above notification is performed by MAC CE, the MAC CE may be identified by including a new logical channel ID (Logical Channel ID (LCID)) that is not defined in the existing standard in the MAC subheader.

[0264] When the above notification is performed by DCI, the above notification may be performed based on a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used for scrambling Cyclic Redundancy Check (CRC) bits assigned to the DCI, a format of the DCI, or the like.

[0265] In addition, the notification of any information to the UE in the above-described embodiments may be performed periodically, semi-persistently, or aperiodically.

[0266] <<Notification of Information from UE>> The notification of any information from the UE to [NW] (in other words, the transmission / reporting of any information from the UE to the BS) in the above-described embodiments may be performed using physical layer signaling (e.g., UCI), upper layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0267] When the above notification is performed by MAC CE, the MAC CE may be identified by including a new LCID not defined in the existing standard in the MAC sub-header.

[0268] When the above notification is performed by UCI, the above notification may be transmitted using PUCCH or PUSCH.

[0269] In addition, the notification of any information from the UE in the above-described embodiments may be performed periodically, semi-persistently, or aperiodically.

[0270] <<Regarding Application of Each Embodiment>> In the UE / BS, specific (one or more) processes / operations / controls / assumptions / information regarding at least one of the above-described embodiments may be applied (used) when any one or a plurality of the following conditions are satisfied: Upper layer parameters indicating the above specific processing / operation / control / assumment / information are set. The specific processing / action / control / assumption / information is determined based on the relevant upper layer parameters. The above specific processes / actions / controls / assumptions / information are specified / activated / triggered by MAC CE / DCI / UCI / resources / channels / RS. Reporting or supporting specific UE capabilities indicating (or relating to) the above specific processes / actions / controls / assumptions / information. · The application of the above specific processing / action / control / assumption / information is judged based on specific conditions.

[0271] The specific UE capabilities may indicate at least one of the following: Supporting specific processing / operations / control / information for at least one of the above embodiments. Supporting the Rel.18 CSI reporting framework for LTM. Support MIMO / mobility for Rel.19 and later. Support MAC CE based event triggered beam reporting. Support L1-RSRP / SINR measurement / reporting. Support CSI measurement / reporting before and after receiving a cell switch command. Support RACH-less / RACH-based LTM.

[0272] Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (e.g., one or a combination of a cell, band, band combination, BWP, component carrier, etc.), or may be a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or may be a capability for each subcarrier spacing (SubCarrier Spacing (SCS)), or may be a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0273] Furthermore, the specific UE capability may be a capability that is applied across all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (for example, Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0274] If the above conditions are not met, the UE / BS may follow the behavior specified in existing 3GPP releases.

[0275] (Addendum) The following inventions are added regarding one embodiment of the present disclosure. [Appendix 1] a receiving unit for receiving a cell switching command; a transmitter that reports capability information related to channel state information (CSI) measurement before receiving the cell switch command; a control unit that controls the start of the CSI measurement based on whether the capability information is reported, The control unit is a terminal that determines the validity of a CSI measurement result based on specific conditions. [Appendix 2] 2. The terminal according to claim 1, wherein the control unit considers the CSI measurement result to be valid within a predetermined time from a certain timing. [Appendix 3] the specific condition is a predetermined time for determining the validity of the CSI measurement result, The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the predetermined time is a shortest time from receiving the cell switch command to transmitting a CSI report, or a shortest time from receiving a CSI-RS resource to transmitting a CSI report. [Appendix 4] 4. The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein a correspondence with a specific symbol is referenced for a subcarrier interval of a cell for which CSI measurement / reporting is triggered.

[0276] (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.

[0277] 6 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may be simply referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0278] 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.

[0279] 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.

[0280] 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))).

[0281] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The location, number, shape, size, etc. of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.

[0282] 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.

[0283] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0284] 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.

[0285] Furthermore, the user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

[0286] 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.

[0287] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0288] The core network 30 may include network functions (NFs) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and an Operation, Administration and Maintenance (Management) (OAM). Note that a single network node may provide multiple functions. Furthermore, communication with an external network (e.g., the Internet) may be performed via the DN.

[0289] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0290] 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).

[0291] 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.

[0292] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0293] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0294] 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).

[0295] 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.

[0296] 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.

[0297] 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.

[0298] 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.

[0299] 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.

[0300] 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.

[0301] 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.

[0302] 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.

[0303] 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).

[0304] (base station) 7 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0305] 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.

[0306] 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.

[0307] 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.

[0308] 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.

[0309] 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.

[0310] 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.

[0311] 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.

[0312] 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.

[0313] 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.

[0314] 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.

[0315] 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 .

[0316] 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 .

[0317] 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.

[0318] 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.

[0319] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes providing NFs), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0320] 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.

[0321] 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.

[0322] 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.

[0323] The transceiver 120 may transmit a cell switch command. The transceiver 120 may receive capability information related to channel state information (CSI) measurements before receiving the cell switch command and an indication of the validity of the CSI measurements initiated by the terminal based on whether to report the capability information.

[0324] (user terminal) 8 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0325] Note that this example mainly shows functional blocks of the characteristic parts of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0326] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0327] 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.

[0328] 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.

[0329] 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.

[0330] 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.

[0331] 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.

[0332] 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.

[0333] 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.

[0334] 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.

[0335] 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.

[0336] 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.

[0337] 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.

[0338] 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.

[0339] 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.

[0340] 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.

[0341] The transmitting section and receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0342] The control unit 210 may perform at least part of the processing of the control unit in the above appendix.

[0343] The transceiver unit 220 may perform at least part of the processing of the transmitter / receiver unit in the above appendix.

[0344] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or multiple devices with software.

[0345] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As mentioned above, the implementation method of each is not particularly limited.

[0346] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 9 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0347] In this disclosure, terms such as apparatus, circuit, device, section, unit, etc. may be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0348] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0349] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0350] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0351] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be realized in a similar manner.

[0352] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory, or the like. The memory 1002 may store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to an embodiment of the present disclosure.

[0353] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as a secondary storage device.

[0354] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0355] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0356] 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.

[0357] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using such hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0358] 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.

[0359] (Variation) Note that terms explained in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0360] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0361] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), the number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0362] A slot may be composed of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol), and may be a time unit based on numerology.

[0363] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0364] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be interchangeable.

[0365] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0366] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. However, the definition of TTI is not limited to this.

[0367] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0368] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0369] A TTI having a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0370] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0371] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0372] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0373] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0374] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0375] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0376] The BWP may include an UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0377] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0378] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0379] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0380] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0381] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0382] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes.

[0383] Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0384] With respect to any information (e.g., variables, constants, parameters) described in the present disclosure, even if not specifically stated in the above embodiments, any first device (e.g., UE / base station) may notify any second device (e.g., base station / UE) of information indicating / identifying (or relating to) the value of the any information.

[0385] Notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0386] Note that the physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be called an RRC message, such as an RRC connection setup message or an RRC connection reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0387] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0388] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0389] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0390] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0391] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0392] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "layer," "number of layers," "rank," "resource," "resource set," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," "UE panel," "transmitting entity," "receiving entity," etc. may be used interchangeably.

[0393] In the present disclosure, the term "antenna port" may be interchangeably read as an antenna port for any signal / channel (e.g., a demodulation reference signal (DMRS) port). In the present disclosure, the term "resource" may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource, an SRS resource, etc.). The resource may include time / frequency / code / space / power resources. The spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0394] The group may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, and the like.

[0395] In addition, in the present disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable terms.

[0396] In addition, in the present disclosure, the terms TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0397] 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.

[0398] In this disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interchangeable. In this disclosure, terms such as sequence, list, set, group, cluster, and subset may be interchangeable.

[0399] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and spatial relationship information (TCI state) may be interchangeable. "Spatial relationship information (TCI state)" may be interchangeable with "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. The TCI state and TCI may be interchangeable. The spatial relationship information and spatial relationship may be interchangeable.

[0400] In this disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0401] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0402] In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information.

[0403] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0404] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0405] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

[0406] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0407] The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0408] 10 is a diagram showing an example of a vehicle according to an embodiment. A vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0409] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

[0410] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0411] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0412] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40.

[0413] The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0414] The driving assistance system unit 64 is configured with various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), Artificial Intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0415] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 to and from the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, which are provided in the vehicle 40.

[0416] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the above-mentioned base station 10 or user terminal 20. Furthermore, the communication module 60 may be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (or may function as at least one of the base station 10 and user terminal 20).

[0417] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0418] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0419] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0420] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as uplink channel and downlink channel may be read as sidelink channel.

[0421] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0422] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0423] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the specific order presented.

[0424] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems that use 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other appropriate wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0425] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0426] 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.

[0427] The term "determining," as used in this disclosure, may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, etc.

[0428] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0429] Furthermore, "determination" may be considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "determining" some action. In the present disclosure, "determination" may be read interchangeably with the above-mentioned actions.

[0430] Furthermore, in this disclosure, "determine / determining" may be interchangeably read as "assume / assuming," "expect / expecting," "consider / considering," etc. Furthermore, in this disclosure, "does not expect to do..." may be interchangeably read as "assumes not to do...."

[0431] 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).

[0432] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0433] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0434] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0435] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0436] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0437] 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.

[0438] 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").

[0439] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0440] 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.

[0441] 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.

[0442] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The description of the present disclosure is for illustrative purposes only and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. a receiving unit for receiving a cell switching command; a transmitting unit that reports capability information related to channel state information (CSI) measurement before receiving the cell switch command; a control unit that controls the start of the CSI measurement based on whether the capability information is reported; The control unit is a terminal that determines the validity of a CSI measurement result based on specific conditions.

2. The terminal according to claim 1 , wherein the control unit considers the CSI measurement result to be valid within a predetermined time from a certain timing.

3. the specific condition is a predetermined time for determining the validity of the CSI measurement result, The terminal according to claim 1, wherein the predetermined time is the shortest time from receiving the cell switching command to transmitting a CSI report, or the shortest time from receiving a CSI-RS resource to transmitting a CSI report.

4. The terminal according to claim 1 , wherein a correspondence relationship with a specific symbol is referenced for a subcarrier interval of a cell for which CSI measurement / reporting is triggered.

5. receiving a cell switch command; reporting capability information related to channel state information (CSI) measurements before receiving the cell switch command; controlling the initiation of the CSI measurement based on whether the capability information is reported; and determining the validity of the CSI measurement result based on a specific condition.

6. a transmitter for transmitting a cell switching command; A base station having a receiving unit that receives capability information related to channel state information (CSI) measurement before receiving the cell switch command and an indication regarding the validity of the CSI measurement result initiated by the terminal based on whether to report the capability information.

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