Terminal, radio communication method, and base station

Abstract

To improve communication quality / throughput.SOLUTION: A terminal according to an aspect of the present disclosure has: a receiving section that receives settings indicating a plurality of channel state information (CSI)-reference signal (RS) resources for reporting of the CSI of lower layer triggered mobility (LTM) candidate cells; and a control section that determines, on the basis of the settings, whether to include, in the reporting, CSI-RS resource indicators (CRI) from all or part of the plurality of CSI-RS resources.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), it is being considered to support UE-initiated beam reports (UEIBRs) initiated by a terminal (User Equipment, UE).

[0006] Such beam / channel state information (CSI) reporting is being considered for support in multi-input multi-output (MIMO) / mobility in Rel. 19 and later.

[0007] However, there are cases where such beam / CSI reporting is not sufficiently considered, which may result in lower latency communications being impossible to achieve, and may inhibit improvements in communication quality and throughput.

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

[0009] A terminal according to one embodiment of the present disclosure includes a receiving unit that receives a configuration indicating a plurality of CSI-reference signal (RS) resources for reporting channel state information (CSI) of a candidate cell for lower layer triggered mobility (LTM), and a control unit that determines, based on the configuration, whether to include CSI-RS resource indicators (CRIs) from all or a portion of the plurality of CSI-RS resources in the report. [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 shows an example of CRI according to option 1-1 of the first embodiment. [Figure 4] FIG. 4 shows an example of CMR settings according to option 2-1 of the second embodiment. [Figure 5] FIG. 5 shows an example of the relationship between the CMR setting and the ZP-IMR setting according to option 1-2-2 of the third embodiment. [Figure 6] FIG. 6 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present disclosure. [Figure 7] FIG. 7 is a diagram illustrating an example of a configuration of a base station according to an embodiment of the present disclosure. [Figure 8] FIG. 8 is a diagram illustrating an example of the configuration of a terminal according to an embodiment of the present disclosure. [Figure 9] FIG. 9 is a diagram illustrating an example of a hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

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

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

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

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

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

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

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

[0019] (1) The UE receives from the serving cell the SSB configuration of a cell (additional cell) with a different PCI for beam measurement / serving cell change. (2) The UE performs beam measurements of cells using different PCIs and reports the measurement results to the serving cell. (3) The UE may receive a configuration of a cell with a different PCI (serving cell configuration) through higher layer signaling (e.g., RRC). That is, a pre-configuration regarding a serving cell change may be performed. This configuration may be performed together with the configuration in (1) or separately. (4) Based on the above report, the TCI states of cells with different PCIs may be activated by L1 / L2 signaling according to the change of serving cell. The activation of the TCI states and the change of serving cell may be performed separately. (5) The UE changes the serving cell (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] Figure 1B shows an example of UE mobility in Rel. 18. In Rel. 18, the serving cell is switched by L1 / L2 (e.g., DCI / MAC CE). The UE can receive / transmit UE-dedicated channels / common channels to / from the new serving cell (or target serving cell). The UE may move out of the coverage of the current serving cell (e.g., current serving cell).

[0022] <Rel.18 LTM> The main motivation for lower layer triggered mobility (LTM) is to reduce disruption time (in RACH-based cell switches). LTM has several characteristics: ◆Handover can be performed without RACH / RRC reconfiguration / MAC reset. ◆ One or more candidate cells are in the same CU as the serving cell. ◆ One or more candidate cells may be on the same or different frequency as the serving cell.

[0023] After the UE receives the LTM configuration from the serving cell, several steps are performed before making a cell switch decision to one or more candidate cells: ◆ DL synchronization [between the UE and one or more candidate cells] ◆L1 measurement report ◆ UL synchronization [between the UE and one or more candidate cells] ◆TCI state activation [from serving cell to UE]

[0024] After that, when the serving cell determines the cell switch and selects one target cell from one or more candidate cells, it transmits a cell switch command (CSC) MAC CE to the UE. The CSC MAC CE contains some of the following information about the target cell of the cell switch among [one or more candidate cells]. ◆ Configuration ID [for indicating the target cell] ◆ TCI state ID ◆ timing advance (TA) value ◆ CFRA resource index (optional)

[0025] The UE that receives the CSC MAC CE performs a RACH-based or RACH-less cell switch (connection) to the target cell. The UE then transmits its first UL to the serving cell.

[0026] (Type of beam report) <In-cell beam report in Rel.15 / 16> In Rel.15 / 16, in-cell beam reporting is supported. For example, L1-RSRP / SINR reporting can be configured by upper layer signaling (RRC).

[0027] For example, in the calculation of L1-RSRP, the UE can configure 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.

[0028] Also, the UE can be configured with up to 16 CSI-RS resource sets each having up to 64 resources per set. In all resource sets, the total number of different CSI-RS resources is 128 or less.

[0029] For L1-RSRP reporting, if the higher layer parameter nrofReportedRS (e.g., in CSI-ReportConfig) is set to 1, the reported L1-RSRP value is defined as a 7-bit value in the range [-140 to -44] dBm with a step size of 1 dB.

[0030] 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.

[0031] 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.

[0032] For example, for L1-SINR calculation and channel measurement, a UE may be configured with either or both of NZP CSI-RS resources and SS / PBCH block resources, and for interference measurement, a UE may be configured with either NZP CSI-RS resources or CSI-IM resources.

[0033] For channel measurements, the UE may be configured with a CSI resource setting for up to 16 CSI-RS resource sets with up to 64 CSI resources or SS / PBCH block resources.

[0034] For L1-SINR reporting, if the upper layer parameter nrofReportedRS is set to 1, the reported L1-SINR value is defined as a 7-bit value in the range [-23 to 40] dBm with a step size of 0.5 dB.

[0035] If the upper layer parameter nrofReportedRS is set to be greater than 1 or the upper layer parameter groupBasedBeamReporting is set to "enabled", the UE uses the differential value-based L1-SINR value for reporting.

[0036] The difference value is calculated in 1 dB step sizes, referring to the largest measurement value that is part of the same L1 - SINR reporting instance.

[0037] In the present disclosure, the in - cell beam reporting of Rel.15 / 16 (which may also be simply referred to as in - cell beam reporting) may be called type 1 beam reporting (beam reporting type 1), or beam reporting for in - cell beam switching.

[0038] <Inter - cell beam reporting of Rel.17> As described above, in Rel.17, L1 / L2 inter - cell mobility is supported. For example, the UE can transmit and receive UL / DL channels / signals between the PCI of a cell different from the PCI of the serving cell. For example, if a non - serving cell has a larger RSRP than the serving cell, the UE can transmit and receive UL / DL channels / signals with the non - serving cell without performing a handover.

[0039] 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 of 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.

[0040] The setting by upper - layer signaling supports up to seven additional cells. Note that ID = 0 means the PCI of the serving cell.

[0041] In the present disclosure, the inter - cell beam reporting (in Rel.17 / 18) may be called type 2 beam reporting (beam reporting type 2). Type 2 beam reporting can be further classified into type 2 - 1 and 2 - 2, which will be described later.

[0042] In this disclosure, the beam report of Rel. 17 may be referred to as a type 2-1 beam report or a beam report for inter-cell beam switching.

[0043] <Inter-cell beam report of Rel. 18> Also, for the beam report of Rel. 18, only SSB-based L1-RSRP reports (beam reports) are supported. Here, the number L of candidate cells can be any one of 1 to 4, and the number M of beams per cell (per hit) can be any one of 1 to 4. For example, in the beam report, a 7-bit absolute value (the largest L1-RSRP value among all cells) is reported for one cell, and all the remaining L1-RSRP values are reported as difference values.

[0044] Regarding beam selection in the SSB-based L1-RSRP report, the maximum value of M*L that can be set in RRC for the above-mentioned M and L, and the combination of M and L may be appropriate depending on the UE capabilities.

[0045] In the L1-RSRP report, the absolute value / difference value of L1-RSRP may be used as in Rel. 15 / 16 / 17.

[0046] In the L1-RSRP report, the reported L1-RSRP value is defined as a 7-bit value in the range of [-140~-44] dBm with a step size of 1 dB.

[0047] Here, the maximum measured value of L1-RSRP is quantized to a 7-bit value in the range of [-140~-44] dBm with a step size of 1 dB. Also, the difference value of L1-RSRP is quantized to a 4-bit value.

[0048] The difference value is calculated with a step size of 2 dB by referring to the largest measured value that is part of the same L1-RSRP report instance.

[0049] 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.

[0050] 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}.

[0051] (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).

[0052] UEIBR / UE initiated beam management (UEIBM) can be used for measurement reporting / beam switch / cell switch etc.

[0053] 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.

[0054] 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.

[0055] 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).

[0056] 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).

[0057] [For MIMO] 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 the beams 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.

[0058] 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.

[0059] Furthermore, at least two of the above events may be defined in combination.

[0060] (UCI-based UEIBR) In the UCI-based UEIBR procedure, the following modes may be supported:

[0061] <<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).

[0062] 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.

[0063] Step 2: The UE detects the DCI format indicating the second UL channel resource.

[0064] Step 3: The UE transmits a beam report using resources (UCI) on the second UL channel.

[0065] 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.

[0066] In this case, periodic PUCCH resources (PUCCH format 0 / 1) may be configured by dedicated higher layer signaling.

[0067] <<Mode B>> Mode B relates to UCI within pre-configured resources for the second UL channel.

[0068] 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.

[0069] Step 2: The UE transmits a beam report in the second UL channel (eg, using a specific resource (UCI) within the channel).

[0070] Note that the notification in step 1 may be included in a separate reporting instance from the beam report in step 2.

[0071] 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.

[0072] In this case, periodic PUCCH resources (PUCCH format 0 / 1) may be configured by dedicated higher layer signaling.

[0073] In either of the above-mentioned modes A / B, cross-CC (component carrier) beam reporting may be supported.

[0074] 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).

[0075] The CG PUSCH may carry UL data (UL-SCH) and beam reports.

[0076] In addition, the CG PUSCH may be a CG PUSCH specific to transmitting beam reports (and may not transmit UL data / other UCI).

[0077] Furthermore, use of PUCCH and PUSCH with / without UL data as the second UL channel is being considered.

[0078] (Considerations for measurement reports) CSI-RS-based L1-RSRP measurements are supported. Additionally, support for CSI-RS-based L1-SINR measurements is under consideration.

[0079] Explicit configuration of CSI-RS resources for candidate cells for L1 measurements is supported.

[0080] 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.

[0081] The Rel.18 CSI reporting framework for LTM can serve as a baseline for gNB-scheduled CSI-RS-based L1 measurement reports.

[0082] 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.

[0083] (Event-triggered beam reporting for mobility) The above-mentioned UEIBR (Event Triggered Beam Report) can also be extended for mobility.

[0084] 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).

[0085] 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.

[0086] (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.

[0087] 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.

[0088] The configuration of the NZP CSI-RS resource set follows the rules of Rel. 17 and has resource set-specific parameters.

[0089] (MAC CE based event-triggered beam reporting for mobility) Regarding L1 measurement reports, the use of MAC CE is being considered.

[0090] For example, an event-triggered L1 measurement may be reported from the UE to the network (NW) via the MAC CE.

[0091] Regarding existing resource allocation, the following is specified:

[0092] 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.

[0093] Note that prioritization between MAC CEs with the same priority may be up to the UE implementation.

[0094] (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.

[0095] 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.

[0096] 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 two N TS - May be used to map one trigger condition.

[0097] 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, up to 2 for further DCI indication via the CSI request field. N TS This may be used to activate a trigger state.

[0098] 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.

[0099] The number of trigger conditions is up to 2. N TS -1, and each trigger state may correspond to a codepoint in the CSI request field in the DCI.

[0100] Each trigger state may include multiple (eg, up to 16) reporting configurations (CSI-ReportConfig).

[0101] (CSI report or reporting) In Rel.15 NR, a terminal (also referred to as a user terminal, User Equipment (UE), etc.) generates (also referred to as determining, calculating, estimating, measuring, etc.) channel state information (CSI) based on a reference signal (RS) (or a resource for the RS), and transmits (also referred to as reporting, feeding back, etc.) the generated CSI to a network (e.g., a base station). The CSI may be transmitted to the base station using, for example, an uplink control channel (e.g., a Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (e.g., a Physical Uplink Shared Channel (PUSCH)).

[0102] The RS used to generate the CSI may be, for example, at least one of a Channel State Information Reference Signal (CSI-RS), a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, a Synchronization Signal (SS), a Demodulation Reference Signal (DMRS), etc.

[0103] The CSI-RS may include at least one of a Non-Zero Power (NZP) CSI-RS and a CSI-Interference Management (CSI-Interference Measurement, CSI-IM). The SS / PBCH block is a block including an SS and a PBCH (and corresponding DMRS), and may be referred to as an SS block (SSB). The SS may also include at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).

[0104] The CSI may include at least one of a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a CSI-RS Resource Indicator (CRI), a SS / PBCH Block Resource Indicator (SSBRI, SSB index), a Layer Indicator (LI), a Rank Indicator (RI), Layer 1 Reference Signal Received Power (L1-RSRP), Reference Signal Received Quality (L1-RSRQ), Signal to Interference plus Noise Ratio (L1-SINR), and Signal to Noise Ratio (L1-SNR).

[0105] The UE may receive information about CSI reporting (report configuration information) and control CSI reporting based on the report configuration information. The report configuration information may be, for example, "CSI-ReportConfig" of an information element (IE) of Radio Resource Control (RRC).

[0106] The reporting configuration information (for example, the RRC IE "CSI-ReportConfig") may include, for example, at least one of the following: ◆ Information about the type of CSI report (report type information, e.g., RRC IE "reportConfigType") Information about one or more quantities of CSI to be reported (one or more CSI parameters) (report quantity information, e.g., RRC IE "reportQuantity") Information about the RS resources used to generate the quantity (CSI parameter) (resource information, for example, the RRC IE "CSI-ResourceConfigId") Information about the frequency domain to which CSI is reported (frequency domain information, e.g., RRC IE "reportFreqConfiguration")

[0107] For example, the report type information may indicate periodic CSI (P-CSI) reporting, aperiodic CSI (A-CSI, AP-CSI) reporting, or semi-persistent CSI (SP-CSI) reporting.

[0108] Furthermore, the reporting amount information may specify a combination of at least one of the above CSI parameters (for example, CRI, RI, PMI, CQI, LI, L1-RSRP, etc.).

[0109] The resource information may also be IDs of resources for RSs, which may include, for example, non-zero power CSI-RS resources or SSBs and CSI-IM resources (e.g., zero power CSI-RS resources).

[0110] The frequency domain information may also indicate frequency granularity of CSI reporting. The frequency granularity may include, for example, a wideband and a subband. The wideband is the entire CSI reporting band. The wideband may be, for example, the entirety of a certain carrier (a component carrier (CC)), a cell, or a serving cell), or the entirety of a bandwidth part (BWP) within a certain carrier. The wideband may also be referred to as a CSI reporting band, the entire CSI reporting band, etc.

[0111] Furthermore, a subband is a part of a wideband and may be configured with one or more resource blocks (RBs or PRBs). The size of the subband may be determined according to the size of the BWP (the number of PRBs).

[0112] The frequency domain information may indicate whether wideband or subband PMI is to be reported (for example, the frequency domain information may include an RRC IE "pmi-FormatIndicator" used to determine whether wideband PMI reporting or subband PMI reporting is to be performed). The UE may determine the frequency granularity of the CSI report (i.e., whether wideband PMI reporting or subband PMI reporting is to be performed) based on at least one of the above-mentioned reporting amount information and frequency domain information.

[0113] When wideband PMI reporting is configured, one wideband PMI may be reported for the entire CSI reporting band, whereas when subband PMI reporting is configured, a single wideband indication i1 may be reported for the entire CSI reporting band, and one subband indication i2 (e.g., one subband indication for each subband) may be reported for each of one or more subbands within the entire CSI reporting band.

[0114] The UE performs channel estimation using the received RS to estimate a channel matrix H. The UE feeds back a performance management index (PMI) determined based on the estimated channel matrix.

[0115] The PMI may indicate a precoder matrix (also simply referred to as a precoder) that the UE considers appropriate for use in downlink (DL) transmissions to the UE. Each value of the PMI may correspond to one precoder matrix. A set of PMI values ​​may correspond to a set of different precoder matrices called a precoder codebook (also simply referred to as a codebook).

[0116] In the space domain, a CSI report may include one or more types of CSI. For example, the CSI may include at least one of a first type (Type 1 CSI) used for single-beam selection and a second type (Type 2 CSI) used for multi-beam selection. The single beam may be rephrased as a single layer, and the multi-beam may be rephrased as multiple beams. Furthermore, Type 1 CSI may not assume multi-user multiple input multiple output (MU-MIMO), while Type 2 CSI may assume multi-user MIMO.

[0117] The codebook may include a codebook for Type-1 CSI (also referred to as a Type-1 codebook, etc.) and a codebook for Type-2 CSI (also referred to as a Type-2 codebook, etc.). Furthermore, Type-1 CSI may include Type-1 single-panel CSI and Type-1 multi-panel CSI, and different codebooks (Type-1 single-panel codebook, Type-1 multi-panel codebook) may be defined for each.

[0118] The uplink control information (UCI) type may include at least one of a Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), a scheduling request (SR), and CSI. The UCI may be carried by the PUCCH or the PUSCH.

[0119] In Rel.15 NR, UCI can contain one CSI part for wideband PMI feedback. CSI report #n contains PMI wideband information if reported.

[0120] In Rel.15 NR, UCI can include two CSI parts for subband PMI feedback. CSI Part 1 includes wideband PMI information. CSI Part 2 includes one wideband PMI and several subband PMIs. CSI Part 1 and CSI Part 2 are coded separately.

[0121] In Rel. 15 NR, a UE is configured by higher layers with N (N≧1) CSI reporting configuration report settings and M (M≧1) CSI resource configuration resource settings. For example, the CSI reporting configuration (CSI-ReportConfig) includes a channel measurement resource setting (resourcesForChannelMeasurement), a CSI-IM resource setting for interference (csi-IM-ResourceForInterference), an NZP-CSI-RS setting for interference (nzp-CSI-RS-ResourceForInterference), and a report quantity (reportQuantity). The channel measurement resource setting, the interference CSI-IM resource setting, and the interference NZP-CSI-RS setting are each associated with a CSI resource configuration (CSI-ResourceConfig, CSI-ResourceConfigId). The CSI resource configuration includes a list of CSI-RS resource sets (csi-RS-ResourceSetList, for example, an NZP-CSI-RS resource set or a CSI-IM resource set).

[0122] For both FR1 and FR2, evaluation and provision of CSI reporting for DL ​​multi-TRP and / or multi-panel transmissions is being considered to enable more dynamic channel / interference hypotheses for NCJT.

[0123] In the present disclosure, Type 1 and Type I may be interpreted as interchangeable. In the present disclosure, Type 2 and Type II may be interpreted as interchangeable.

[0124] In the present disclosure, CSI-RS, periodic CSI-RS (P-CSI-RS), semi-persistent CSI-RS (SP-CSI-RS), and aperiodic CSI-RS (AP-CSI-RS, A-CSI-RS) may be interchangeable. In the present disclosure, CSI-RS, periodic CSI reporting (P-CSI reporting), semi-persistent CSI reporting (SP-CSI reporting), and aperiodic CSI reporting (AP-CSI reporting, A-CSI reporting) may be interchangeable.

[0125] (CSI-RS port) In Rel. 15, for example, CSI-RS is used as a DL RS for at least one of channel state information (CSI) acquisition, beam management (BM), beam failure recovery (BFR), and fine time and frequency tracking. CSI-RS supports 1, 2, 4, 8, 12, 16, 24, and 32 ports (antenna ports, CSI-RS ports). CSI-RS supports periodic, semi-persistent, and aperiodic transmission. The frequency density of CSI-RS is configurable to adjust overhead and CSI estimation accuracy.

[0126] The specification defines a table showing the location of CSI-RS within a slot. Each row in the table indicates the row number, the number of ports, the frequency domain density, the CDM type, the time and frequency (time / frequency) location (the location of the component resource (k bar, l bar)), the code division multiplexing (CDM) group index, and the location of each resource within the component resource ((RE, symbol), (k', l')). Here, the time / frequency location is the location of the time and frequency resource (component resource) of the CSI-RS corresponding to one port. The k bar is represented by an overlined "k." The k bar indicates the starting resource element (RE) index of the component resource, and the l bar indicates the starting symbol (OFDM symbol) index of the component resource.

[0127] CDM groups include no CDM (no CDM, N / A), FD-CDM2, CDM4, and CDM8. FD-CDM2 multiplexes two-port CSI-RSs at the same time and frequency by multiplying a frequency domain (FD)-orthogonal cover code (OCC) of length 2 in each RE (FD2). CDM4 multiplexes four-port CSI-RSs at the same time and frequency by multiplying a length-2 FD-OCC by a length-2 time domain (TD)-OCC in each RE symbol (FD2TD2). CDM8 multiplexes eight-port CSI-RSs at the same time and frequency by multiplying a length-2 FD-OCC by a length-4 TD-OCC in each RE symbol (FD2TD4).

[0128] (CSI reporting settings) The CSI reporting configuration (CSI-ReportConfig) includes a codebook configuration (CodebookConfig), a channel measurement resource (CMR), an interference measurement resource (IMR), etc. The IMR may be at least one of a zero power-interference measurement resource (ZP-IMR) and a non-zero power-interference measurement resource (NZP-IMR).

[0129] The UE is configured with parameters (codebook configuration (CodebookConfig)) related to the codebook (CB) by higher layer signaling (RRC signaling). The codebook configuration is included in the CSI reporting configuration (CSI-ReportConfig) of the higher layer (RRC) parameters.

[0130] In the codebook setting, at least one codebook is selected from a plurality of codebooks including type 1 single panel (typeI-SinglePanel), type 1 multi-panel (typeI-MultiPanel), type 2 (typeII), and type 2 port selection (typeII-PortSelection, PS).

[0131] The codebook parameters include the codebook subset restriction (CBSR) parameter ("...Restriction" in CodebookConfig). The CBSR setting is a bit that indicates which PMI reports are allowed ('1') and which are not allowed ('0') for the precoder associated with the CBSR bit. One bit in the CBSR bitmap corresponds to one codebook index / antenna port.

[0132] In the present disclosure, the terms codebook (CB), Type 1 / Type 2 / Type 2PS CB, extended CB based on Type 1 / Type 2 / Type 2PS CB, CSI, and PMI may be interchangeable.

[0133] In the present disclosure, CMR[configuration], CSI resource for channel measurement[configuration], CSI resource setting for channel measurement, NZP CSI-RS resource for channel measurement[configuration], and resourcesForChannelMeasurement may be interchangeable. In the present disclosure, IMR[configuration], CSI resource for interference measurement[configuration], CSI resource setting for interference measurement, ZP-IMR[configuration], CSI-IM resource, CSI-IM resource setting [for interference measurement], csi-IM-ResourcesForInterference, and ZP CSI-RS resource may be interchangeable. In the present disclosure, IMR[configuration], CSI resource for interference measurement[configuration], CSI resource setting for interference measurement, NZP-IMR[configuration], NZP CSI-RS resource for interference measurement[configuration], and nzp-CSI-RS-ResourcesForInterference may be interchangeable.

[0134] (Rel.19 MIMO Considerations) Because the maximum number of CSI-RS ports, 32, is greater than the maximum number of layers, 8, the UE can measure more channel conditions, improving measurement accuracy.

[0135] From Rel. 19 onwards, massive MIMO using more than 32 ports is being considered.

[0136] Targeting FR1, a CSI that supports up to 128 CSI-RS ports is being considered. Specifically, the following items are being considered: ◆Item 2a: Based on an extension of the existing codebook, an improvement to the Type 1 codebook that supports up to a total of 128 CSI-RS ports across all resources, assuming existing CSI-RS resources (with up to 32 CSI-RS ports per resource). ◆Item 2b: Improvement of the Type 2 codebook to support up to a total of 128 CSI-RS ports across all resources, assuming existing CSI-RS resources (with up to 32 CSI-RS ports per resource), based on an extension of the existing codebook without changing any codebook parameters other than the introduction of an additional value for the codebook parameter for the number of ports. ◆Item 2c: Enhancement of CRI-based CSI reporting (reporting of CQI / PMI / RI calculated per CRI for one or more CRIs) for hybrid beamforming supporting up to 32 CSI-RS ports per resource and up to 128 CSI-RS ports in total across all resources without new codebook design. ◆Item 2d: For a 6 / 8Rx low complexity receiver supporting more than four layers, SRS port grouping and association of SRS port grouping to two codewords using existing codebooks are considered. The 6 / 8Rx low complexity receiver may use six or eight Rx antennas. No extensions to codeword-to-layer mapping, DL resource allocation, CSI feedback, or DCI format may be required.

[0137] Expanding CSI-RS resources to support up to 128 ports To support large antenna arrays at the higher frequencies of FR1, an expansion of CSI-RS resources to support up to 128 ports is being considered.

[0138] To support 48, 64, or 128 ports, K=2, 3, or 4 existing NZP CSI-RS resources may be aggregated. Each NZP CSI-RS resource may use the same number of ports. The K NZP CSI-RS resources may use the same QCL, PCoffset, and PCoffsetSS. The K NZP CSI-RS resources may be associated with the same CSI-RS resource set. The K NZP CSI-RS resources may be located within one slot or two consecutive slots. Basic UE functionality may support K NZP CSI-RS resources located within one slot, while optional UE functionality may support K NZP CSI-RS resources located within two slots.

[0139] To support one slot transmission, resource-specific configuration of even-indexed PRBs (evenPRBs) or odd-indexed PRBs (oddPRBs) may be allowed for a density of 0.5 RE / RB / port.

[0140] For AP-CSI-RS, resource-specific slot offset indication may be allowed when K resources are within two consecutive slots. The indication may be one bit per resource via RRC IE.

[0141] For the total number of ports P across the K aggregated resources, K, and the number of ports N per existing NZP CSI-RS resource, the following multiple configurations may be supported: ◆P=48, K=2, N=24 ◆P=48, K=3, N=16 ◆P=64, K=2, N=32 ◆P=64, K=4, N=16 ◆P=128,K=4,N=32

[0142] For a setting of P=128, K=4, and N=32, K=4 existing CSI-RS resources may be arranged in one slot across two frequency resources that are FDM'd and two time resources that are TDM'd.

[0143] In the present disclosure, the number of [CSI-RS] ports up to 32, the number of conventional ports, and the number of existing ports may be interchangeable. In the present disclosure, the number of [CSI-RS] ports greater than 32, the number of ports up to 128, the number of expansion ports, and the number of new ports may be interchangeable.

[0144] (analysis) For FR2 and single TRP (sTRP) with intra-cell and inter-cell beam management, assuming a unified TCI and leveraging the traditional CSI measurement and reporting configuration framework [where possible], the following extensions are being considered to facilitate UE-initiated / event-driven beam management for overhead / latency reduction: ◆a: UL signaling content for UE-initiated / event-driven beam reporting to facilitate fast beam switching. ◆b: A medium / container for UL signaling, designed primarily for beam reporting purposes, taking into account the UE-initiated / event-driven nature of UL transmissions.

[0145] As a measurement-related extension aimed at supporting LTM, the components required to support event-triggered L1 measurement reporting (event-triggered measurement targets for MIMO, event-triggered measurement targets for mobility) are being considered.

[0146] In early CSI acquisition for LTM candidate cells, one direction for CSI-RS resource configuration is that multiple CSI-RS resources are provided for one candidate cell via RRC, and some (subset) of the multiple CSI-RS resources are further indicated by the NW for measurement.

[0147] For CSI acquisition of a target cell, it is considered that a UE is provided with one or more periodic (P-)CSI-RS resources and one or more RRC configurations for CSI reporting for one or more candidate cells, and that multiple CSI-RS resources for CMR are associated with one CSI reporting configuration.

[0148] Here, there are several points of contention: ◆Issue 1: There has been insufficient consideration as to whether it is necessary for the UE to report CRI in the CSI report for the candidate cell indicated after a cell switch in LTM, and if so, what the meaning of that CRI is. ◆Issue 2: The consideration of channel measurement resource (CMR) measurements and CRI reporting has not been sufficiently considered in cases where CSI-RS resources are configured using up to 32 ports and in cases where CSI-RS resources are configured using more than 32 ports. ◆Issue 3: For LTM candidate cells, in addition to CMR settings, interference measurement resource (IMR) settings have not been sufficiently considered.

[0149] If these considerations are not given enough attention, there is a risk that communication quality / throughput will decline.

[0150] Therefore, the present inventors have devised a method for configuring resources for CSI measurement / reporting. According to one aspect of the present disclosure, a UE can be appropriately configured with resources for CSI measurement / reporting of LTM candidate cells.

[0151] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the respective embodiments may be applied independently or in combination. The present disclosure also provides embodiments in which part or all of one embodiment is combined with part or all of another embodiment.

[0152] (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.

[0153] 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."

[0154] 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.

[0155] 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.

[0156] In the present disclosure, signaling, message, field, parameter, information, payload, etc. may be read interchangeably.

[0157] In the present disclosure, higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, Non-Access Stratum (NAS) signaling (of the control plane), other messages (e.g., messages communicated to and from the core network, such as positioning protocol (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP)) messages), or a combination thereof.

[0158] 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.

[0159] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0160] (Wireless communication method) The UE may receive a configuration (e.g., a CSI reporting configuration, a CSI resource configuration) indicating multiple CSI-RS resources for CSI measurement / reporting of LTM candidate cells. Based on the configuration, the UE may determine whether to include CRIs from all or some of the multiple CSI-RS resources in the report.

[0161] In the present disclosure, virtual CSI-RS resources, extended CSI-RS resources, CSI-RS resources using an extended number of ports, and aggregated multiple CSI-RS resources [using a conventional number of ports] may be read as interchangeable.

[0162] In the present disclosure, the terms "indicated" TCI state, R [resource] S within the TCI state, source RS [resource] of the TCI state, and source RS of the TCI state and QCL'd RS [resource] may be read interchangeably.

[0163] <Embodiment 1> This embodiment relates to CSI reporting associated with multiple CSI-RS resources (for LTM candidate cells).

[0164] This embodiment may be based on one of the following options x:

[0165] <<Option 1>> If multiple CSI-RS resources are configured for CSI reporting, the UE may need to report one CRI for the CSI. This option may be based on one of the following options 1-x:

[0166] <<<Option 1-1>>> The UE may select and report CRI from all of the multiple CSI-RS resources configured by the RRC.

[0167] As in the example of FIG. 3, the reported CRI k may correspond to the (k+1)th entry of the CSI-RS resources configured by the RRC in the configured order.

[0168] <<<Option 1-2>>> The UE may select and report a CRI from a subset of the RRC configured CSI-RS resources, which may include only the CSI-RS resources associated with the TCI states activated by the MAC CE.

[0169] In the present disclosure, multiple TCI states activated by a MAC CE, multiple source RSs for multiple TCI states activated by a MAC CE, and multiple RSs QCL'd (quasi co-located) with multiple source RSs for multiple TCI states activated by a MAC CE may be read interchangeably.

[0170] The reported CRI k may correspond to the (k+1)-th entry of the CSI-RS resources in the subset in the configured order, or may correspond to the (k+1)-th entry of the CSI-RS resources in the subset in the order of the TCI states associated with the CSI-RS resources in the subset.

[0171] <<<Options 1-3>>> The UE may select and report a CRI from a subset of the CSI-RS resources configured by the RRC, which may include only the CSI-RS resources indicated (further by the NW) via MAC CE / DCI.

[0172] The reported CRI k may correspond to the (k+1)th entry of the multiple CSI-RS resources in the subset in the configured order, or may correspond to the (k+1)th entry of the multiple CSI-RS resources in the subset in the indicated order [of the MAC CE / DCI].

[0173] <<<Options 1-4>>> The UE may select and report CRI from a subset of the CSI-RS resources configured by the RRC, which may be determined by explicit or implicit indication (other than Option 1-1 to Option 1-3).

[0174] The reported CRI k may correspond to the (k+1)-th entry of the multiple CSI-RS resources in the subset in the configured order, or may correspond to the (k+1)-th entry of the multiple CSI-RS resources in the subset in the order of their explicit or implicit indication.

[0175] <<Option 2>> If multiple CSI-RS resources are configured for CSI reporting, the UE may not report the CRI.

[0176] The reported CSI may correspond to the CMR of the CSI-RS resource that is the source RS of the TCI state indicated in the cell switch command, or may correspond to the CMR of the CSI-RS resource that is QCL'd with the source RS of the TCI state indicated in the cell switch command. The reported CSI may be CSI excluding CRI, or may be RI / PMI / CQI.

[0177] According to embodiment 1, even when multiple CSI-RS resources are configured [for one candidate cell in LTM], the UE can appropriately report CSI.

[0178] <Embodiment 2> This embodiment relates to the number of ports for one or more CMRs for measuring / reporting CSI for LTM candidate cells.

[0179] For a candidate cell for LTM, a CSI reporting configuration may be configured to indicate one or more CMRs using up to 32 ports (legacy port number) or up to 128 ports (extended port number).

[0180] This embodiment may be based on one of the following options x:

[0181] <<Option 1>> [For one or more CMRs configured for LTM candidate cells] The UE may support up to 32 ports.

[0182] <<Option 2>> [For one or more CMRs configured for LTM candidate cells] The UE may support up to 128 ports.

[0183] The first embodiment may be applied to the number of ports up to 32. An extension based on the first embodiment may be applied to the number of ports greater than 32 (48, 64, 128 ports). The extension based on the first embodiment may be based on one of the following multiple options 2-x.

[0184] <<<Option 2-1>>> The UE may support CRI reporting. As shown in the example of FIG. 4, there may be multiple virtual CSI-RS resources in a CMR configuration. Each virtual CSI-RS resource may use an aggregation configuration of K CSI-RS resources using the number of conventional ports. As in Option 1 of the first embodiment, the CRI report may correspond to one virtual CSI-RS resource from all of the RRC-configured CSI-RS resources, or one virtual CSI-RS resource from a subset of the RRC-configured CSI-RS resources.

[0185] <<<Option 2-2>>> The UE may not support CRI reporting. This option may be based on one of the following options 2-2-x:

[0186] ◆Option 2-2-a: There may be only one virtual CSI-RS resource for a port of the extended port number for a CMR using an aggregation configuration of K CSI-RS resources using the conventional port number.

[0187] ◆ Option 2-2-b: As in option 2-1, there may be multiple virtual CSI-RS resources within the CMR configuration. Since the reported CSI (RI / PMI / CQI) [other than CRI] corresponds to the virtual CSI-RS resource, CRI reporting may not be necessary. The virtual CSI-RS resource or any one CSI-RS resource from the aggregated K CSI-RS resources may be the source RS in the TCI state indicated in the cell switch command, or may correspond to the CMR of the CSI-RS resource QCL'd with the source RS in the TCI state indicated in the cell switch command.

[0188] One virtual CSI-RS resource configuration using the extended port number may be realized by configuring multiple CSI-RS resources using the conventional port number.

[0189] According to the second embodiment, the UE can use an appropriate number of ports for multiple CSI-RS resources (for one candidate cell in LTM).

[0190] <Embodiment 3> This embodiment relates to the configuration of CMR / IMR for CSI measurement / reporting for LTM candidate cells.

[0191] This embodiment may be based on at least one of the following options x:

[0192] <<Option 1>> If multiple CSI-RS resources for up to 32 ports are configured for CSI reporting for LTM candidate cells, the resource configuration supported by the UE may be based on at least one of the following options 1-x:

[0193] <<<Option 1-1>>> The UE may not support individual IMR settings.

[0194] <<<Option 1-2>>> The UE may support a separate ZP CSI-RS resource (ZP-IMR) configuration for interference measurement. The ZP-IMR configuration may be based on at least one of the following options 1-2-x: ◆ Option 1-2-1: The ZP-IMR setting may indicate only one ZP-IMR for all of the multiple CMRs. ◆ Option 1-2-2: As in the example of Figure 5, the ZP-IMR setting may indicate multiple ZP-IMRs for multiple CMRs using one-to-one mapping with the CMRs.

[0195] <<<Options 1-3>>> The UE may support a separate NZP-IMR (NZP CSI-RS resource) configuration for interference measurement. The NZP-IMR configuration may be based on at least one of the following options 1-3-x: ◆ Option 1-3-1: The NZP-IMR setting may indicate only one NZP-IMR for all of the multiple CMRs. ◆ Option 1-3-2: The NZP-IMR setting may indicate multiple NZP-IMRs for multiple CMRs using one-to-one mapping with the CMRs.

[0196] <<Option 2>> If multiple CSI-RS resources for more than 32 ports (48, 64, 128 ports) are configured for CSI reporting for LTM candidate cells, the resource configuration supported by the UE may be based on at least one of the following multiple options 2-x:

[0197] <<<Option 2-1>>> The UE may not support individual IMR settings.

[0198] <<<Option 2-2>>> The UE may support a separate ZP CSI-RS resource (ZP-IMR) configuration for interference measurement.

[0199] In the case of one virtual CSI-RS resource configuration (using an aggregation configuration of K CSI-RS resources) for CMR, the ZP-IMR configuration may indicate one ZP-IMR.

[0200] In the case of multiple virtual CSI-RS resource configurations for CMR (where each virtual CSI-RS resource uses a configuration of an aggregation of K CSI-RS resources), the ZP-IMR configuration may be based on at least one of the following options 2-2-x: ◆ Option 2-2-1: The ZP-IMR setting may indicate only one ZP-IMR for all of the multiple CMRs. ◆ Option 2-2-2: The ZP-IMR setting may indicate multiple ZP-IMRs for multiple CMRs using one-to-one mapping with the CMRs.

[0201] <<<Option 3-3>>> The UE may support a separate NZP CSI-RS resource (NZP-IMR) configuration for interference measurement.

[0202] In the case of one virtual CSI-RS resource configuration (using an aggregation configuration of K CSI-RS resources) for CMR, the NZP-IMR configuration may indicate one NZP-IMR.

[0203] In the case of multiple virtual CSI-RS resource configurations for CMR (where each virtual CSI-RS resource uses a configuration of an aggregation of K CSI-RS resources), the NZP-IMR configuration may be based on at least one of the following options 2-3-x: ◆ Option 2-3-1: The NZP-IMR setting may indicate only one NZP-IMR for all of the multiple CMRs. ◆ Option 2-3-2: The NZP-IMR setting may indicate multiple NZP-IMRs for multiple CMRs using one-to-one mapping with the CMRs.

[0204] <Supplementary> The above-mentioned multiple embodiments / options / selections may be combined as one embodiment / option / selection.

[0205] In the above embodiments, the measured RS may be the QCL source RS in the active TCI state / indicated / unified TCI state.

[0206] <<Notification of Information to UE / BS>> The notification of any information from [Network (NW) (e.g., Base Station (BS)) / NW node] to UE / BS in the above embodiments (in other words, the reception of any information from BS / NW node by UE / BS) may be performed using physical layer signaling (e.g., DCI), upper layer signaling (e.g., RRC signaling, MAC CE, NAS signaling, LPP message, NRPPa message), specific signals / channels (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0207] When the above notification is performed by MAC CE, the MAC CE may be identified by including a new logical channel ID (LCID) not defined in the existing standard in the MAC sub-header.

[0208] When the above notification is performed by DCI, the above notification may be performed by a specific field of the DCI, a radio network temporary identifier (RNTI) used for scrambling the cyclic redundancy check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0209] In addition, notification of any information to the UE / BS in the above-described embodiments may be performed periodically, semi-persistently, or aperiodically. Notification of semi-persistent or aperiodically may be triggered by an instruction from the UE / BS / NW.

[0210] In the above-described embodiment, the information from the NW may be set / instructed by any one of the following methods or a combination thereof: Common to multiple UEs, or individual to each UE (per UE), Common to multiple BSs, or BS individual (per BS), Common to multiple frequencies (e.g., one or a combination of cells, bands, band combinations, Bandwidth Parts (BWPs), component carriers, etc.) (e.g., cell-common), or frequency-specific (per frequency, e.g., per cell).

[0211] In the above embodiment, the UE may receive information (QCL information) of at least one of the following several QCL rules / QCL types from the NW: ◆QCL Type A (Doppler shift, Doppler spread, mean delay and delay spread) ◆QCL Type B (Doppler shift and Doppler spread) ◆QCL Type C (Doppler shift and mean delay) ◆QCL Type D (spatial reception parameters)

[0212] In the above-described embodiments, the QCL source RS for each QCL type may be at least one of the following several RSs: ◆SSB ◆CSI-RS with / without repetition ◆TRS ◆DMRS for PDCCH / PDSCH

[0213] In the above embodiment, the information from the NW may be set / instructed by the following method. ◆Common to multiple UEs or individual UEs ◆Cell-specific or common to multiple cells ◆Per UE / Per CC / Per BWP / Per band / Per cell / Per cell group (CG)

[0214] <<Notification of information from UE / BS>> In the above embodiments, the notification of any information from UE / BS to [NW] (or equivalently, the transmission / reporting of any information from UE / BS to BS / NW node) may be performed using physical layer signaling (e.g., UCI), upper layer signaling (e.g., RRC signaling, MAC CE, NAS signaling, LPP message, NRPPa message), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0215] 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.

[0216] When the above notification is performed by UCI, the above notification may be transmitted using PUCCH or PUSCH.

[0217] Also, the notification of any information from UE / BS in the above embodiments may be performed periodically, semi-persistently or aperiodically. The semi-persistent or aperiodic information notification may be triggered by an instruction from UE / BS / NW.

[0218] <<Regarding the application of each embodiment>> In UE / BS, specific (e.g., one or more, or some) processing / operations / controls / assumptions / information for at least one of the above embodiments may be applied (used) when any one or a plurality of the following conditions are satisfied: · An upper layer parameter indicating the above specific processing / operation / control / assumption / information is set for the UE / BS. The specific processing / operation / control / assumption / information is determined in the UE / BS based on relevant higher layer parameters; The above specific process / operation / control / assumption / information is specified / activated / triggered for the UE / BS by the MAC CE / DCI / UCI / resource / channel / RS, The UE / BS reports or supports specific capabilities (e.g., UE capabilities) that indicate (or relate to) the specific processing / action / control / assumptions / information. The application of the above specific processing / operation / control / assumption / information is determined in the UE / BS based on specific conditions.

[0219] The specified capabilities may indicate at least one of the following: ◆Supporting the above specific processing / action / control / assuming / information, ◆ Supporting one or more CSI-RS resources with more than 32 CSI-RS ports (48, 64, 128 ports) for LTM candidate cells; ◆ Number of configurations / resources [sets] supported.

[0220] In the present disclosure, "supporting" and "whether to support" may be read interchangeably.

[0221] Furthermore, the above-mentioned specific capabilities may be capabilities that are applied across all frequencies (commonly regardless of frequency), capabilities for each frequency (e.g., one or a combination of a cell, band, band combination, BWP, component carrier, etc.), capabilities for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0222] Furthermore, the above-mentioned specific capabilities may be capabilities that are applied across all duplexing methods (commonly regardless of the duplexing method), or may be capabilities for each duplexing method (for example, Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0223] If the above conditions are not met, the UE / BS may follow the behavior specified in existing 3GPP releases.

[0224] (Addendum) The following inventions are added regarding one embodiment of the present disclosure. <Appendix 1> a receiver for receiving a configuration indicating a plurality of CSI-reference signal (RS) resources for reporting channel state information (CSI) of a lower layer triggered mobility (LTM) candidate cell; and a control unit that determines, based on the configuration, whether to include CSI-RS resource indicators (CRIs) from all or some of the plurality of CSI-RS resources in the report. <Appendix 2> 2. The terminal of claim 1, wherein the receiver receives an indication of a portion of the plurality of CSI-RS resources. <Appendix 3> 3. The terminal of claim 1 or 2, wherein the plurality of CSI-RS resources are associated with more than 32 ports. <Appendix 4> 4. The terminal of claim 1, wherein the configuration indicates one or more interference measurement resources for the plurality of CSI-RS resources for channel measurement. <Appendix A> a transmitter for transmitting a configuration indicating a plurality of CSI-reference signal (RS) resources for reporting channel state information (CSI) of a lower layer triggered mobility (LTM) candidate cell; and a control unit that determines, based on the configuration, whether CSI-RS resource indicators (CRIs) from all or a portion of the plurality of CSI-RS resources are included in the report.

[0225] <Supplementary information> The terminal in Supplementary Notes 1 to 4 may be terminal 20. The receiver / transmitter in Supplementary Notes 1 to 4 may be transceiver 220. The controller in Supplementary Notes 1 to 4 may be controller 210. The base station in Supplementary Notes A may be base station 10. The receiver / transmitter in Supplementary Notes A may be transceiver 120. The controller in Supplementary Notes A may be controller 110.

[0226] (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.

[0227] 6 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present disclosure. The wireless communication system 1 (which may be simply referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0228] 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.

[0229] 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.

[0230] 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))).

[0231] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A terminal 20 may be located within at least one of the cells. The arrangement, number, shape, size, etc. of each cell and terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.

[0232] 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.

[0233] The terminal 20 may be connected to at least one of the multiple base stations 10. The terminal 20 may use at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0234] 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.

[0235] Furthermore, the terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

[0236] 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.

[0237] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN, 5GC), a Next Generation Core (NGC), and the like.

[0238] The core network 30 may include network functions (Network Functions (NFs)) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). Note that a single network node (which may simply be referred to as a node) may provide multiple functions. Furthermore, communication with an external network (e.g., the Internet) may be performed via the DN.

[0239] The terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0240] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the radio communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and the uplink (UL).

[0241] 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.

[0242] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0243] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0244] 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).

[0245] 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.

[0246] 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.

[0247] 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.

[0248] 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.

[0249] 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.

[0250] 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.

[0251] 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.

[0252] 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.

[0253] 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).

[0254] (base station) 7 is a diagram illustrating an example of the configuration of a base station according to an embodiment of the present disclosure. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0255] 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.

[0256] 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.

[0257] 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.

[0258] 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.

[0259] 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.

[0260] 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.

[0261] 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.

[0262] 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.

[0263] 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.

[0264] 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.

[0265] 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 .

[0266] 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 .

[0267] 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.

[0268] 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.

[0269] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes providing NFs), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the terminal 20.

[0270] 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.

[0271] 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.

[0272] 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.

[0273] Furthermore, in the present disclosure, a network device (for example, an LMF node) having the functionality of any of the above-described NFs may be a device having the configuration (for example, the control unit 110 and the transceiver unit 120) of the base station 10. In other words, by replacing the base station with the network device, the configuration of the network device according to an embodiment of the present disclosure may be covered.

[0274] (Terminal) 8 is a diagram illustrating an example of the configuration of a terminal according to an embodiment of the present disclosure. The terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the terminal may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0275] In this example, functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0276] The control unit 210 performs overall control of the terminal 20. The control unit 210 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0277] 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.

[0278] 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.

[0279] 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.

[0280] 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.

[0281] 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.

[0282] 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.

[0283] 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.

[0284] 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.

[0285] 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.

[0286] 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.

[0287] 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.

[0288] 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.

[0289] 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.

[0290] 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.

[0291] The transmitting section and receiving section of the terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0292] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by hardware, software, or a combination of these. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using a single device that is physically or logically coupled, or may be realized by using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or the multiple devices with software.

[0293] For example, a base station, a terminal, a network node, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 9 is a diagram illustrating an example of the hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. The above-described base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0294] In the present disclosure, any two terms selected from a set of terms such as apparatus, circuit, device, section, unit, module, chip, means, etc. may be read as interchangeable. The hardware configurations of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0295] Each function in the base station 10 and the terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as the processor 1001 and the memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control the reading, writing, or both reading and writing of data in the memory 1002 and the storage 1003.

[0296] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001. Although only one processor 1001 is shown in the figure, there may be multiple processors.

[0297] The processor 1001 also reads programs (program codes), software modules, data, etc. from the storage 1003, the communication device 1004, or both the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be realized in a similar manner.

[0298] The various processes described above may be performed by one processor 1001, or may be performed by two or more processors 1001 simultaneously, sequentially, or using other techniques. The processor 1001 may be implemented by one or more chips. The program may be transmitted from a network via a telecommunications line, or may be provided to the computer device via, for example, the communication device 1004.

[0299] The present disclosure also provides a computer program product including a computer program, which may implement the steps of the methods described in the above embodiments when the computer program is executed by a computer (e.g., the processor 1001).

[0300] The memory 1002 is a non-transitory computer-readable recording medium and may be configured, for example, by a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically EEPROM (EEPROM), a random access memory (RAM), or a combination of at least two of these. The memory 1002 may also be referred to as a register, a cache, a main memory, or the like. The memory 1002 may store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to one embodiment of the present disclosure.

[0301] Storage 1003 is a non-transitory computer-readable recording medium, and may be, for example, a flexible disk, a floppy disk, an optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a magneto-optical disk, a removable disk, a hard disk drive, a smart card, a flash memory (e.g., a card, stick, key drive), a magnetic stripe, or the like, or a combination of at least two of these. Storage 1003 may also be referred to as a secondary storage device.

[0302] The above-mentioned recording medium may be, for example, the memory 1002, the storage 1003, or a database including both the memory 1002 and the storage 1003, a server, or other suitable medium.

[0303] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via a wired network, a wireless network, or both a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., or a combination of at least two of these. For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0304] The input device 1005 is an input device that accepts input from the outside (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc., or a combination of at least two of these). The output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc., or a combination of at least two of these). Note that the input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0305] 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.

[0306] Furthermore, base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), a graphics processing unit (GPU), a neural processing unit (NPU), or a combination of at least two of these, and some or all of the functional blocks may be realized using such hardware. For example, processor 1001 may be implemented using at least one of these hardware elements.

[0307] In this disclosure, the term "processor" may encompass a single processor or a group of multiple processors, including, for example, a single-core processor, a multi-core processor, multiple processors in a single device, multiple processors in wired or wireless communication with each other, etc. Similarly, the term "(non-transitory) computer-readable storage medium" may encompass a single storage medium or a group of multiple storage media, including multiple storage media in wired or wireless communication with each other.

[0308] Devices such as processors and storage media in the present disclosure may be distributed locally or remotely, and may perform the processing of the devices by operating cooperatively or independently using a bus, network, the Internet, the cloud, etc.

[0309] 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.

[0310] (Variation) Each aspect / embodiment described in the present disclosure may be a mobile communication system other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), International Mobile Telecommunications-Advanced (IMT-Advanced), 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G-Advanced (5G-A), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or a decimal number)), Future Radio Access (FRA), New Radio (NR), New radio access (NX), Future generation radio access (FX), Open Radio Access Network (Open RAN (O-RAN)), Wideband Code Division Multiple Access (W-CDMA (registered trademark)), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.11x (where x is any character string such as b, a, g, n, ac, ax, be, or bn, and when x = n, it is called Wi-Fi 4, when x = ac, it is called Wi-Fi 5, when x = ax, it is called Wi-Fi 6 or Wi-Fi 6E, when x = be, it is called Wi-Fi 7, and when x = bn, it is called Wi-Fi 8.Note that the present disclosure may be applied to systems based on technologies such as Wi-Fi (a registered trademark), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), network virtualization technologies (e.g., Network Function Virtualization (NFV), Service Function Chaining (SFC), Software Defined Networking (SDN)), or Low Power Wide Area (LPWA). Furthermore, each aspect / embodiment described in the present disclosure may be applied to a system based on a combination of at least two of these technologies. Here, "based on" naturally refers not only to a system that uses the technology in question, but also to a system that uses an extension or modification of the technology.

[0311] In the present disclosure, any two terms selected from a set of terms such as "Base Station (BS)", "Radio Base Station", "Fixed Station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "Access Point (AP)", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "Radio Unit (RU)", "Remote Unit (RU)", "Control Unit (CU)", "Distributed Unit (DU)", "Remote Radio Head (RRH)", "node", "gateway", "terrestrial base station", "stratospheric base station", "unmanned aerial vehicle", "High Altitude Platform Station (HAPS)", "airborne platform", "panel", "cell", "Radio Access Network (RAN)", "network", etc. may be used interchangeably. Each cell accommodated by a base station may be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, a serving cell, a super cell, etc. In the present disclosure, any two terms selected from a set of terms such as "cell," "sector," "cell group," "carrier," "component carrier," "cluster," "bandwidth part (BWP)," and "carrier bandwidth" may be used interchangeably.

[0312] In the present disclosure, any two terms selected from the set of terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "Device", "Module", "Terminal", etc. may be used interchangeably.

[0313] A terminal may be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, router (e.g., home router, mobile router, etc.), Telematics Control Unit (TCU), or some other suitable terminology.

[0314] The base station and the terminal may each be composed of one or more devices. The devices constituting at least a part of the base station and the terminal may be called a transmitting device, a receiving device, a [wireless] communication device, etc. In addition, the devices constituting at least a portion of each of the base stations and terminals may be objects themselves, such as vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, unmanned aerial vehicles, stratospheric base stations (e.g., High Altitude Platform Stations (HAPS)), artificial satellites (e.g., Low Earth Orbit (LEO) satellites, Middle Earth Orbit (MEO) satellites, Geostationary Earth Orbit (GEO) satellites), drones (registered trademark), multicopters, quadcopters, balloons, Internet of Things (IoT) equipment (e.g., smart meters, sensors), etc., or may include, but are not limited to, objects or devices mounted on such objects. Furthermore, the object may be a moving object (hereinafter referred to as a "moving object"; this does not exclude the case where the moving object is stationary and not moving), or may be a fixedly positioned object (hereinafter referred to as a "non-moving object").

[0315] Furthermore, a base station in the present disclosure may be read as a terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)) or communication in a non-terrestrial network (Non-Terrestrial Network (NTN)). In this case, the terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "sidelink") or terms corresponding to NTN (for example, feeder link, service link). For example, terms such as uplink channel and downlink channel may be read as sidelink channel.

[0316] The present disclosure is also applicable to cases where at least some of the devices constituting the base station and the terminal operate outside the earth (for example, in the atmosphere or outer space).

[0317] Similarly, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station 10 may be configured to have the functions of the terminal 20 described above.

[0318] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node or by some of its upper nodes (e.g., CU, RU, DU, etc.) in some cases. It is clear that various operations performed for communication with a terminal in a RAN or core network may be performed by at least some of the base station and other network nodes other than the base station. The other network node may be one node or a combination of multiple nodes. The network node is, for example, a node provided in various core networks such as an Evolved Packet Core (EPC) or a 5G Core Network (5GCN, 5GC), and provides one or more network functions (Network Functions (NFs)), but is not limited to these.

[0319] Furthermore, in the present disclosure, the operation of "a terminal receives information from a base station" accompanies the operation of "the base station transmits the information to the terminal," "the base station generates the information," or both. Similarly, the operation of "a terminal transmits information to a base station" accompanies the operation of "the base station receives the information from the terminal." Furthermore, operations such as "a terminal is configured to ..." or "configure UE to ..." may include the operation of "a base station transmits configuration information regarding the configuration of the terminal" or "a terminal configures a predetermined operation based on the configuration information."

[0320] The notification of information is not limited to the aspects / embodiments described in the present disclosure and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination of at least two of them.

[0321] The physical layer signaling may be referred to as Layer 1 (L1) control information. The MAC signaling may be referred to as, for example, a MAC Control Element (CE) or a MAC Protocol Data Unit (PDU). The RRC signaling may be referred to as an RRC message or an information element (IE) in the RRC message. The RRC signaling may be, for example, a message used for controlling an RRC connection (e.g., setup, reconfiguration, establishment, reestablishment, release, or resume), mobility, a measurement report, notification of terminal capabilities, or an information element in the message.

[0322] Furthermore, notification of information may be either explicit or implicit. Note that an explicit notification of certain information means notification of the certain information itself, and an implicit notification of certain information may mean notification of information other than the certain information, or the certain information being deemed to have been notified when a certain condition is met.

[0323] Furthermore, notification of information may include not only notification between the same layers of different devices (for example, between a lower layer or an upper layer of the base station 10 and the terminal 20) but also notification between different layers in the same or different devices (for example, between a lower layer and an upper layer in the base station 10 or the terminal 20). Furthermore, notification of information from one device to another device may be performed via one or more devices.

[0324] With respect to any information (e.g., variables, constants, parameters, settings) described in the present disclosure, even if not specifically stated in the above embodiments, any first device (e.g., terminal / base station) may notify any second device (e.g., base station / terminal) of information indicating / identifying (or relating to) the value of the any information.

[0325] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed as long as it is consistent. For example, the methods described in this disclosure present various step elements using an exemplary order and are not limited to the particular order presented. Furthermore, at least one step may be omitted in the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure.

[0326] 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.

[0327] In the present disclosure, a radio resource may be defined by a combination of resource units in one or more domains, such as the time domain, the frequency domain, the spatial domain, the code domain, and the power domain.

[0328] For example, a resource in the time domain (which may be referred to as a time resource) may be defined by one or more time units. The one or more time units may include, but are not limited to, a radio frame, a subframe, a slot, a symbol, a transmission time interval (TTI), or a combination of at least two of these. Furthermore, the time unit may be a fixed-length time unit that is independent of numerology, a variable-length time unit that is dependent on numerology, or both.

[0329] Examples of fixed-length time units include, but are not limited to, subframes each consisting of one or more slots and radio frames each including multiple subframes. Examples of variable-length time units include, but are not limited to, symbols and slots each including a fixed number of symbols. A certain time unit may be divided into time units shorter than the certain time unit. Examples of such shorter time units include, but are not limited to, minislots each consisting of fewer symbols than the number of symbols that make up a slot. The above-described time units may include time units used as units for scheduling, link adaptation, and the like. Any time unit in the present disclosure may be interchangeable with another time unit.

[0330] Numerology is a parameter that defines the physical layer structure, and may be a parameter based on at least one of, for example, Subcarrier Spacing (SCS), symbol length, cyclic prefix length, and sampling time.

[0331] A resource in the frequency domain (which may also be referred to as a frequency resource) may be defined by, for example, one or more frequency units. The one or more frequency units may include, for example, a subcarrier, a resource block (RB), a bandwidth part (BWP), a carrier bandwidth, or a combination of at least two of these, but the name of the frequency unit is not limited to these. Furthermore, the number of subcarriers included in a certain frequency unit may be a fixed number regardless of numerology, or may be a variable number that changes depending on numerology.

[0332] For example, an RB is composed of a predetermined number of consecutive subcarriers in the frequency domain, and the number of subcarriers included in the RB may be the same regardless of numerology, for example, 12, but is not limited to this. Also, a BWP may be composed of, for example, one or more consecutive RBs within a certain carrier bandwidth, but is not limited to this. One or more BWPs may be configured within one carrier for terminal 20, and at least one of the BWPs may be activated. Also, any frequency unit in the present disclosure may be interpreted as another frequency unit.

[0333] Furthermore, resources in both the time domain and the frequency domain may be defined by one or more time / frequency units each consisting of a time unit and a frequency unit, such as, but not limited to, a resource element (RE) consisting of one symbol and one subcarrier, a resource element group (REG) consisting of a predetermined number of REs, or a control resource set (CORESET) consisting of a predetermined number of symbols and a predetermined number of RBs.

[0334] The resources in the spatial domain (which may also be referred to as spatial resources) may be defined, for example, by one or more spatial units, including, but not limited to, beams, layers of Multi-Input Multi-Output (MIMO), antenna ports, etc., or a combination of at least two of them.

[0335] The resource in the code domain (which may also be referred to as a code resource) may be defined by, for example, one or more code units, including, but not limited to, a Cyclic Shift (CS), an Orthogonal Cover Code (OCC), or a combination thereof.

[0336] 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.

[0337] In the present disclosure, terms such as "decide," "determine," "judge," "select," "specify," "compute," "calculate," "process," "derive," "look up / search / inquiry," "confirm," "assume," "expect," and "consider" may be read interchangeably. Also, in the present disclosure, performing a certain process (e.g., sending, receiving) may be read interchangeably as deciding to perform that process. Also, in the present disclosure, "not expected to do..." may be read interchangeably as "assumed not to do...."

[0338] 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).

[0339] 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").

[0340] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0341] 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.

[0342] 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.

[0343] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial relation information," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "port," "layer," "number of layers," "rank," "resource," "resource set," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," "UE panel," "transmitting entity," "receiving entity," etc. may be used interchangeably.

[0344] In the present disclosure, an antenna port may be interchangeably read as an antenna port for any signal / channel (e.g., a Demodulation Reference Signal (DMRS) port). In the present disclosure, a resource may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource). Furthermore, the spatial domain filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0345] In the present disclosure, beam, sounding reference signal (SRS) resource indicator (SRS Resource Indicator (SRI)), control resource set (CONTROLLER RESOLUTION SET (CORESET)), CORESET pool, uplink shared channel (Physical Downlink Shared Channel (PDSCH)), uplink shared channel (Physical Uplink Shared Channel (PUSCH)), codeword (CW), transport block (TB), reference signal (RS), etc. may be interpreted as interchangeable.

[0346] In the present disclosure, the terms TCI state, TCI, downlink TCI state (Downlink (DL) TCI state), uplink TCI state (Uplink (UL) TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0347] 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.

[0348] In this disclosure, terms such as index, identifier (ID), identity (ID), indicator, indication, resource ID, etc. may be interchangeable. In this disclosure, terms such as sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0349] In the present disclosure, a group may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, an RS group, a CORESET group, a Physical Uplink Control Channel (PUCCH) group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, and the like.

[0350] Information in this disclosure (e.g., variables, constants, parameters, settings) may be interchangeably read as the ID of the information. For example, TCI state and TCI state ID may be interchangeably read as the ID of the information. Also, information in this disclosure may be interchangeably read as "a set of the information," "one or more pieces of the information," etc.

[0351] Any signal / channel (e.g., PUCCH) in the present disclosure may be interchangeably read as another signal / channel (e.g., PUSCH, PDSCH, any RS). A signal / channel may be interchangeably read as a signal / channel for the same direction (e.g., UL if the certain signal / channel is in the UL direction, and DL if in the DL direction), or as a signal / channel for another direction (e.g., DL if the certain signal / channel is in the UL direction, and UL if in the DL direction). Also, in the present disclosure, descriptions related to DL communication and descriptions related to UL communication may be interchangeably read. In this case, DL (UL) operation may be interchangeably read as the corresponding UL (DL) operation. For example, reception of a PDSCH in a terminal may be interchangeably read as transmission of a PUSCH in the terminal.

[0352] In the present disclosure, terms such as "X's number," "X number," "the number of X(s)," and "a number of X(s)" may be interchangeable. Note that X here may be replaced with an appropriate expression such as a noun, a gerund, or an ordinary sentence, depending on the context. In the present disclosure, "number" may be interchangeable with terms such as maximum number, minimum number, average number, and total number. In addition, in the present disclosure, terms such as "value," "index," "number," and "quantity" may be interchangeable with each other.

[0353] Values / ranges in this disclosure may be interpreted as approximations, as if the words "about" or "approximately" were preceding the value / range. In this disclosure, "A and B are the same" (A and B are any words) may mean "A and B are identical," "A and B are almost the same," "A and B are partly the same (or partially overlapped)," "There is an error within a certain range between A and B," etc. (i.e., these words may be read interchangeably). Furthermore, in the present disclosure, A and B being the same may mean that at least part of A and at least part of B are the same (or overlapped).

[0354] In this disclosure, the terms "one embodiment," "some embodiments," "another embodiment," etc. may be used interchangeably. The appearances of phrases such as "one embodiment," "some embodiments," "another embodiment," etc. in this disclosure do not necessarily all refer to the same embodiment, nor are they necessarily meant to be mutually exclusive.

[0355] In the present disclosure, expressions such as "at least one of A and B," "at least one of A or B," "A and / or B," and "A / B" may be read interchangeably, and may be understood to include "only A," "only B," or "both A and B." Furthermore, in this disclosure, expressions such as "at least one of A, B, and C," "at least one of A, B, or C," "A, B and / or C," and "A / B / C" may be interpreted interchangeably and may be understood to include "only A," "only B," "only C," "A and B," "B and C," "C and A," or "all of A, B, and C." Note that similar interpretations / interpretations may be applied to any expression in this disclosure such as "at least X of ..." (where the number of elements in "..." and X are each any number).

[0356] In the present disclosure, expressions such as "A, [and] B, and the like" / "such as A [and] B"), "A, [or] B, or the like" / "such as A [or] B"), "A, B, etc." / "A, B, and so on" / "A, B, and so forth"," and "A, B, [and / or] the others" may be read interchangeably.

[0357] In the present disclosure, expressions representing one / single X (e.g., "a X," "one X," "a single X"), expressions representing one or more X (e.g., "one or more X(s)," "at least one of X(s)"), and expressions representing a plurality of X (e.g., "Xs," "more than one X(s)," "multiple X(s)," "a plurarity of X(s)") may be read interchangeably. Note that these expressions may also be read interchangeably with expressions that include specific wording (e.g., when X is an uncountable noun, "pieces of," "amount of," etc.). For example, "a plurality of pieces of spatial relation information" may be read interchangeably as "a plurality of spatial relation information."

[0358] The present disclosure has been described above, but it is for illustrative purposes only, and the present invention is not limited to the aspects / embodiments described in the present disclosure. The present disclosure can be implemented in modified and altered forms without departing from the spirit of the invention. The present disclosure and its modifications and alterations are included in the scope of the present invention and its equivalents.

Claims

1. a receiver for receiving a configuration indicating a plurality of CSI-reference signal (RS) resources for reporting channel state information (CSI) of a lower layer triggered mobility (LTM) candidate cell; A control unit that determines whether to include CSI-RS resource indicators (CRIs) from all or some of the plurality of CSI-RS resources in the report based on the setting.

2. The terminal of claim 1 , wherein the receiver receives an indication of a portion of the plurality of CSI-RS resources.

3. The terminal of claim 1 , wherein the plurality of CSI-RS resources are associated with more than 32 ports.

4. The terminal of claim 1 , wherein the configuration indicates one or more interference measurement resources for the plurality of CSI-RS resources for channel measurement.

5. receiving a configuration indicating a plurality of CSI-reference signal (RS) resources for channel state information (CSI) reporting of a lower layer triggered mobility (LTM) candidate cell; and determining, based on the setting, whether to include CSI-RS resource indicators (CRIs) from all or some of the plurality of CSI-RS resources in the report.

6. a transmitter configured to transmit a configuration indicating a plurality of CSI-reference signal (RS) resources for reporting channel state information (CSI) of a lower layer triggered mobility (LTM) candidate cell; and a control unit that determines whether CSI-RS resource indicators (CRIs) from all or some of the plurality of CSI-RS resources are included in the report based on the configuration.

Images