Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is characterized by being provided with: a control unit that measures at least one of Layer 1 (L1) Reference Signal Received Power (RSRP) of a Reference Signal (RS) across one or more frequencies or one or more cells and an L1 signal to interference plus noise ratio (L1-Signal to Interference plus Noise Ratio (SINR)), and that determines whether or not the measurement result satisfies a specific condition; and a transmission unit that transmits a channel state information (CSI) report including at least one of the L1-RSRP and the L1-SINR when the measurement result satisfies a specific condition. According to one embodiment of the present disclosure, it is possible to appropriately perform CSI measurement or reporting in a plurality of frequencies / cells.

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 Art

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized to achieve even higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) has been standardized to further enhance the capacity and sophistication of LTE (Release 8 and 9 of the Third Generation Partnership Project (3GPP (registered trademark))).

[0003] Successor systems to LTE (e.g., also referred to as 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later) are also under study.

[0004] Prior art literature

[0005] Non-patent literature

[0006] 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

[0007] Problems to be solved by the invention

[0008] In wireless communication systems, one or more cells / transmission / reception points (TRPs) (Multi-TRPs (MTRPs)) are being studied for performing downlink (DL) transmission to a terminal (user terminal, User Equipment (UE)).

[0009] When multiple TRPs are applied, it is possible that the serving cell is switched to a cell (additional cell / candidate cell) with a PCI different from that of the serving cell through signaling of at least one of layer 1 and layer 2 (L1 / L2 inter-cell mobility).

[0010] However, when the frequencies of the PCIs are different, the CSI measurement and reporting in each frequency / cell (e.g., L1 RSRP, L1 It is not clear how the settings related to SINR measurement and reporting are performed, and how measurements or reporting are performed. If measurements or reporting are not performed properly across multiple frequencies / cells, there is a concern that problems such as reduced communication throughput may occur.

[0011] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately perform CSI measurement or reporting in multiple frequencies / cells.

[0012] Means for solving problems

[0013] A terminal according to one embodiment of the present disclosure is characterized by comprising: a control unit configured to measure at least one of Layer 1 (L1) Reference Signal Received Power (RSRP) and L1-Signal to Interference plus Noise Ratio (SINR) of a reference signal (RS) across one or more frequencies or one or more cells, and determine whether the measurement result satisfies a specific condition; and a transmitting unit configured to transmit a message containing the L1-RSRP and the L1-SINR if the measurement result satisfies the specific condition. At least one channel state information (CSI) report of the SINR.

[0014] Effects of the Invention

[0015] According to one aspect of the present disclosure, CSI measurement or reporting in multiple frequencies / cells can be appropriately performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A This is a diagram showing an example of UE mobility in Rel.17. Figure 1B This is a diagram showing an example of UE mobility in Rel.18.

[0017] Figure 2 This is a diagram showing an example of the association between a serving cell and candidate cells.

[0018] Figure 3A This is a diagram showing the second example of Option 2. Figure 3B This is a diagram showing the third example of Option 2.

[0019] Figure 4 This is a diagram showing example 1 of serving cell switching.

[0020] Figure 5 This is a diagram showing example 2 of serving cell switching.

[0021] Figure 6 This is a diagram showing example 3 of serving cell switching.

[0022] Figure 7 This is a diagram showing an overview of the CSI reporting configuration of RRC.

[0023] Figure 8 This is a diagram showing part of the CSI resource configuration of Rel.17.

[0024] Figure 9 This figure shows a part of the CSI-SSB resource set of Rel.17.

[0025] Figure 10 This diagram shows the settings related to L3 measurement / reporting in Rel.17.

[0026] Figure 11 This is a diagram showing examples of RSRP values ​​in multiple frequencies.

[0027] Figure 12 This is a diagram showing an example of CSI-SSB-ResourceSet of option 1 for extending the L1 measurement / reporting configuration.

[0028] Figure 13 This is a diagram showing an example of CSI-SSB-ResourceSet of Option 2, which is an extension of the L1 measurement / reporting configuration.

[0029] Figure 14 This is a diagram showing an example of CSI reporting in multiple frequencies.

[0030] Figure 15 This is a diagram showing an example of a CSI measurement / reporting method in multiple frequencies.

[0031] Figure 16 This is a diagram showing a first example of a regenerated index (re-indexing index).

[0032] Figure 17 This is a diagram showing a first specific example of a CSI report including a regenerated index.

[0033] Figure 18 This is a diagram showing a second specific example of a CSI report including a regenerated index.

[0034] Figure 19 This is a diagram showing a third specific example of a CSI report including a regenerated index.

[0035] Figure 20 This is a diagram showing the CSI report in Report Example 2-1.

[0036] Figure 21 This is a diagram showing the CSI report in Report Example 2-2.

[0037] Figure 22 This figure shows an example of CSI reporting using Option 1 of Method 3-1.

[0038] Figure 23 This figure shows an example of CSI reporting using Option 2 of Method 3-1.

[0039] Figure 24 This is a flowchart showing an example of the processing of the fifth / sixth embodiment.

[0040] Figure 25 This is a diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment.

[0041] Figure 26 This is a diagram showing an example of the configuration of a base station according to one embodiment.

[0042] Figure 27 This is a diagram showing an example of the configuration of a user terminal according to one embodiment.

[0043] Figure 28 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment.

[0044] Figure 29 This is a diagram showing an example of a vehicle according to an embodiment. DETAILED DESCRIPTION

[0045] (CSI Report)

[0046] In NR, the UE uses a specific reference signal (or the resources used for the reference signal) to measure the channel state and feeds back (reports) the channel state information (CSI) to the base station.

[0047] UE can also use Channel State Information Reference Signal (CSI ReferenceSignal: CSI The channel status is measured using the RS, Synchronization Signal / Physical Broadcast Channel (SS / PBCH) blocks, Synchronization Signal (SS), DeModulation Reference Signal (DMRS), etc.

[0048] CSI RS resources can also contain non-zero power (NZP) CSI RS and CSI At least one Interference Management (IM) block. An SS / PBCH block containing synchronization signals (e.g., the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS)) and the PBCH (and the corresponding DMRS) may also be referred to as an SS block (SSB). An SSB index may also be provided for the temporal position of an SSB within a half-frame.

[0049] In addition, CSI can also include Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI RS Resource Indicator (CSI RS Resource Indicator: CRI), SS / PBCH Block Resource Indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), L1 RSRP (Layer 1-Reference Signal Received Power), L1 RSRQ (Reference Signal Received Quality), L1 SINR (Signal to Interference plus Noise Ratio), L1 At least one of SNR (Signal to Noise Ratio), etc.

[0050] CSI may also have multiple parts. The first part of the CSI (CSI part 1) may also include information with a relatively small number of bits (e.g., RI). The second part of the CSI (CSI part 2) may also include information with a relatively large number of bits (e.g., CQI), such as information determined based on CSI part 1.

[0051] As a CSI feedback method, we study (1) periodic CSI (Periodic CSI: CSI) report, (2) Aperiodic CSI (A(AP) CSI) report, (3) semi-permanent (semi-persistent, semi-persistent (Semi CSI Report (Semi Persistent) Persistent CSI (SP CSI)) reports, etc.

[0052] The UE may also be notified of information related to CSI reporting (also referred to as CSI reporting configuration information) using higher layer signaling, physical layer signaling (e.g., downlink control information (DCI)), or a combination thereof. The CSI reporting configuration information may also be notified using, for example, the RRC information element "CSI ReportConfig" and is set.

[0053] The CSI report configuration information may include information related to the reporting period, offset, etc., which may also be expressed in specific time units (time slot units, subframe units, symbol units, etc.). The CSI report configuration information may also include a configuration ID (CSI ReportConfigId). Based on this setting ID, the type of CSI reporting method (whether it is SP CSI, etc.), and reporting period and other parameters. The CSI reporting configuration information may also include information indicating which signal (or which signal resource) is to be used to report the CSI measured (CSI ResourceConfigId).

[0054] (TCI, spatial relation, QCL)

[0055] In NR, research is underway on reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and coding) of at least one of a control signal and a channel (expressed as signal / channel) in the UE based on the Transmission Configuration Indication state (TCI state).

[0056] The TCI state may also refer to the TCI state applied to the downlink signal / channel. The TCI state applied to the uplink signal / channel may also be expressed as a spatial relation.

[0057] The TCI status refers to information related to Quasi-Co-Location (QCL) of signals / channels and can also be referred to as spatial reception parameters or spatial relation information. The TCI status can also be set for each channel or each signal for the UE.

[0058] QCL is an indicator of the statistical properties of a signal / channel. For example, it can mean that when a signal / channel is in a QCL relationship with other signals / channels, it can be assumed that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameters (e.g., spatial Rx parameters) is the same among these different signals / channels (at least one of which is QCL).

[0059] In addition, the spatial reception parameters may also correspond to the UE's receive beam (e.g., receive analog beam), and the beam may also be determined based on spatial QCL. The QCL (or at least one element of QCL) in this disclosure may also be rewritten as sQCL (spatial QCL).

[0060] QCLs can also be specified in multiple types (QCL types). For example, four QCL types, namely types A to D, can be provided. It can be assumed that the same parameters (or parameter sets) in these four QCL types A to D are different. These parameters (also referred to as QCL parameters) are expressed as follows:

[0061] QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread,

[0062] QCL type B (QCL-B): Doppler shift and Doppler spread,

[0063] QCL Type C (QCL-C): Doppler shift and average delay,

[0064] QCL type D (QCL-D): spatial reception parameters.

[0065] The UE may also assume that a certain Control Resource Set (CORESET), channel, or reference signal has a specific QCL relationship (eg, QCL type D) with other CORESETs, channels, or reference signals, which is called a QCL assumption.

[0066] The UE may also determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) of the signal / channel based on the TCI status or QCL assumption of the signal / channel.

[0067] The TCI state may also be information related to the quality of contact (QCL) between the target channel (in other words, the reference signal (RS) used for that channel) and other signals (for example, other RSs). The TCI state may also be set (indicated) via higher layer signaling, physical layer signaling, or a combination thereof. Furthermore, the channel / signal to which the TCI state applies may be referred to as the target channel / reference signal (target channel / RS), or simply as the target, while the other signal may be referred to as the reference RS, source RS, or simply as the reference. The channel for which the TCI state is set (specified) or spatial relationship is specified may be, for example, at least one of the downlink shared channel (Physical Downlink Shared Channel (PDSCH)), the downlink control channel (Physical Downlink Control Channel (PDCCH)), the uplink shared channel (Physical Uplink Shared Channel (PUSCH)), or the uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0068] In addition, the RS that has a QCL relationship with the channel may be, for example, a synchronization signal block (SynchronizationSignal Block (SSB)), a channel state information reference signal (Channel State Information ReferenceSignal (CSI-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a tracking CSI-RS (also called a tracking reference signal (TRS))), a QCL detection reference signal (also called QRS), a demodulation reference signal (DeModulation Reference Signal (DMRS)), etc., at least one of the following.

[0069] The SSB is a signal block that includes at least one of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a broadcast channel (physical broadcast channel (PBCH)). The SSB may also be referred to as an SS / PBCH block.

[0070] The RS of QCL type X in the TCI state may also mean an RS in a QCL type X relationship with a certain channel / signal (DMRS), and the RS may also be called a QCL source of QCL type X in the TCI state.

[0071] (L1 / L2 inter-cell mobility)

[0072] As described above, the UE is studying UL transmission to one or more cells / TRPs. As the process in this case, consider the following scenario 1 or scenario 2. In addition, in the present disclosure, the serving cell can also be rewritten as the TRP within the serving cell. Layer 1 / layer 2 (layer1 / layer2 (L1 / L2)), DCI / Medium Access Control Control Element (MAC CE)) can also be rewritten with each other. In the present disclosure, a PCI that is different from the physical cell ID (Physical Cell Identity (PCI)) of the current serving cell is sometimes simply referred to as "different PCI". Non-serving cells, cells with different PCIs, and additional cells can also be rewritten with each other.

[0073] Scenario 1

[0074] Scenario 1 corresponds to, for example, inter-cell mobility of multiple TRPs, but may also be a scenario that does not correspond to inter-cell mobility of multiple TRPs.

[0075] (1) The UE receives from the serving cell: the configuration of the SSB for beam measurement corresponding to the TRP of a PCI different from that of the serving cell, and the configuration required to use the radio resources for data transmission and reception, including resources of the different PCI.

[0076] (2) The UE performs beam measurement of TRPs corresponding to different PCIs and reports the beam measurement results to the serving cell.

[0077] (3) Based on the above report, the Transmission Configuration Indication (TCI) state associated with the TRP corresponding to the different PCI is activated through L1 / L2 signaling from the serving cell.

[0078] (4) The UE uses the dedicated channel on the TRP corresponding to different PCIs for transmission and reception.

[0079] (5) The UE must always be within the serving cell, even in the case of multiple TRPs. As with conventional systems, the UE must use common channels from the serving cell (such as the Broadcast Control Channel (BCCH) and the Paging Channel (PCH)).

[0080] In Scenario 1, when the UE transmits and receives signals to and from the additional cell / TRP (the TRP corresponding to the additional cell's PCI), the serving cell (the UE's assumed serving cell) remains unchanged. The UE may also be configured with higher-layer parameters associated with the PCI of a non-serving cell from the serving cell. Scenario 1 is also applicable in Rel. 17, for example.

[0081] Figure 1A This diagram illustrates an example of UE mobility in Rel. 17. Assume that the UE moves from a cell with PCI #1 (serving cell) to a cell with PCI #3 (supplementary cell) (overlapping the serving cell). In this case, in Rel. 17, serving cells are not switched via L1 / L2. Supplementary cells have a different PCI than the serving cell. The UE can transmit and receive UE-dedicated channels from the supplementary cell. To receive UE-common channels (e.g., system information, paging, and short messages), the UE must be within the coverage of the serving cell.

[0082] Scenario 2

[0083] In Scenario 2, L1 / L2 inter-cell mobility is applied. With L1 / L2 inter-cell mobility, it is possible to change the serving cell using functions such as beam steering without reconfiguring the RRC. In other words, it is possible to transmit and receive data with the added cell without performing a handover. Because a period during which data communication is impossible, such as when an RRC reconnection is required for handover, the application of L1 / L2 inter-cell mobility, which does not require a handover, allows data communication to continue even when the serving cell is changed. Scenario 2 can also be applied in Rel. 18, for example. In Scenario 2, for example, the following process is performed.

[0084] (1) For beam measurement / serving cell change, the UE receives the SSB configuration of a cell (additional cell) with a different PCI from the serving cell.

[0085] (2) The UE performs beam measurement on cells using different PCIs and reports the measurement results to the serving cell.

[0086] (3) The UE may also receive the configuration of a cell with a different PCI (serving cell configuration) through higher layer signaling (e.g., RRC). In other words, it is also possible to perform pre-configuration related to the serving cell change. This configuration may be performed together with the configuration in (1) or separately.

[0087] (4) Based on the above report, the TCI status of cells with different PCIs can also be activated through L1 / L2 signaling according to the change of serving cell. The activation of TCI status and the change of serving cell can also be performed separately.

[0088] (5) The UE changes the serving cell (assuming the serving cell) and starts receiving / transmitting using the pre-set UE-specific channel and TCI state.

[0089] That is, in Scenario 2, the serving cell (the assumption of the serving cell in the UE) is updated through L1 / L2 signaling. Scenario 2 can also be applied in Rel. 18.

[0090] Figure 1B This diagram illustrates an example of UE mobility in Rel. 18. In Rel. 18, the serving cell is switched via L1 / L2. The UE can transmit and receive UE-specific channels and common channels with the new serving cell. The UE can also leave the coverage of the previous serving cell.

[0091] (Setting multiple candidate cells)

[0092] Figure 2 This figure shows an example of the association between a serving cell and candidate cells. Assume that SpCell#0, SCell#1, or SCell#2 is a serving cell. Furthermore, SpCell refers to a special cell (including a primary cell (PCell) and a primary secondary cell (PSCell)). SCell refers to a secondary cell. SpCell#0 is associated with candidate cell#0-1, candidate cell#0-2, and candidate cell#0-3. SCell#1 is associated with candidate cell#1-1. SCell#2 is associated with candidate cells#2-1 and 2-2. In this way, a serving cell can be associated with more than one candidate cell (candidate serving cell).

[0093] Regarding the setting of cells that become candidates (candidate cells) when changing the serving cell, for example, the following options 1 and 2 are considered.

[0094] <Option 1>

[0095] As with inter-cell mobility in Rel. 17, the information in ServingCellConfig may also include information on multiple candidate cells. In this case, the multiple candidate cells need to share the same PDCCH / PDSCH / UL settings as the serving cell.

[0096] For example, in Rel. 17 inter-cell mobility, "mimoParam-r17" is added under ServingCellConfig to include PCI configuration information. mimoParam-r17 may also include "additionalPCI-ToAddModList-r17," which lists additional SSBs with a PCI different from the serving cell's PCI. Candidate cells (additional cells, cells with additionalPCI) can also apply the same configuration as the serving cell, with the exception of some information.

[0097] <Option 2>

[0098] Multiple candidate cells can be assigned complete cell-specific configurations (e.g., ServingCellConfig), or the carrier aggregation (CA) configuration framework can be reused to associate each serving cell. In other words, candidate cells can be assigned separate configurations rather than sharing configuration information with the serving cell. Because the UE is provided with complete configurations for each candidate cell, it can communicate appropriately with the candidate cells.

[0099] In the CA setup framework, SpCells can be configured for each cell group, and multiple SCells can be added. Alternatively, by reusing the CA framework, a serving cell can be configured for each cell group for L1 / L2 inter-cell mobility, and multiple candidate cells can be configured. Candidate cells can also be activated / deactivated via MAC CE. Alternatively, TCI information corresponding to a candidate cell can be activated / deactivated via MAC CE, thereby activating / deactivating the candidate cell. This method is believed to be beneficial in reducing the complexity of UE operations.

[0100] Figure 3A This is a diagram showing the first example of Option 2. Figure 3AIn the example of , a common candidate cell pool for cell handover in the MCG / SCG is applied to the candidate cells. That is, the candidate cells are treated as a single pool (group) regardless of the frequency band.

[0101] Figure 3B is a diagram showing a second example of Option 2. Figure 3B In the example, multiple cell groups are configured, and cell group switching can be performed through L1 / L2 signaling. Candidate cells are configured for each cell group, and the configuration of each group includes the index of the corresponding SpCell and SCell.

[0102] (Signaling for serving cell change indication)

[0103] The implicit or explicit signaling for indicating a serving cell change is described.

[0104] [Method 1]

[0105] In method 1, implicit signaling for indicating a serving cell change is described.

[0106] [[Option 1-1]]

[0107] When a specific Control Resource Set (CORESET) (e.g., at least one of CORESET#0, CH5Type0-CSS CORESET, and CH6 / CH7 / CH8 CSS CORESET) is indicated (activated) via a MAC CE along with one or more TCI states associated with a cell having a PCI different from that of the serving cell (for a specific CORESET, one or more TCI states associated with a cell having a PCI different from that of the serving cell are indicated / activated via a MAC CE), the UE may determine that the serving cell is being changed to another cell (cell x, a cell with a different PCI). In other words, this activation may implicitly indicate that the serving cell is being changed to another cell.

[0108] In this case, the UE may also update the beams of other CORESET IDs, other CORESETs using CH6 / CH7 / CH8, or other CORESETs using CSS to the same TCI state as the activated TCI state described above.

[0109] [[Option 1-2]]

[0110] When a MAC CE activates / deactivates the TCI state of the PDSCH, if all TCI states activated by the MAC CE are associated with the same cell x with a PCI different from the PCI of the serving cell, the UE may determine that the serving cell has been changed to another cell (cell x). In other words, this association may implicitly indicate that the serving cell has been changed to another cell.

[0111] In the case of applying this option, when the NW (base station) does not change the serving cell, the MAC CE needs to also include the TCI status associated with other cells (for example, the current serving cell or a cell with a second different PCI) when activating the TCI status of the PDSCH associated with a cell with a different PCI.

[0112] [[Options 1-3]]

[0113] The MAC CE activates / deactivates unified TCI states (e.g., those corresponding to the unified TCI framework of Rel. 17). If all activated unified TCI states are associated with the same cell x with different PCIs, the UE may determine that the serving cell has been changed to another cell (cell x). In other words, this association may implicitly indicate that the serving cell has been changed to another cell.

[0114] [Method 2]

[0115] In Method 2, explicit signaling for indicating a serving cell change is described. Method 2 is applied to, for example, Scenario 2 described above.

[0116] [[Option 2-1]]

[0117] The following describes an example of a serving cell change indication. Furthermore, activation / deactivation of a non-serving cell, changes to a serving cell, and transmission / reception with another cell (non-serving cell) having a physical cell ID different from that of the serving cell may also be overwritten.

[0118] The UE may also receive a new MAC CE for activating / deactivating a non-serving cell, which includes at least one of the following fields (information) (1) to (3) indicating the non-serving cell. Upon receiving this MAC CE, the UE may also determine that the serving cell is changed to another cell (non-serving cell). In addition, the UE may also control the transmission and reception of DL signals / UL signals with the non-serving cell based on this information. In addition, the non-serving cell may be one or more. In the example shown below, a MAC CE including multiple fields indicating multiple non-serving cell indices is applied.

[0119] (1) Service cell ID.

[0120] (2) BWP ID.

[0121] (3) Non-serving cell ID for activation: The non-serving cell ID may be replaced with any information corresponding to a non-serving cell (that can identify the non-serving cell).

[0122] As an example of (3), any one of (3-1) to (3-5) may be applied.

[0123] (3-1) PCI (PCI used directly). For example, 10 bits are used.

[0124] (3-2) Re-indexing of non-serving cells (new IDs). The new ID can be associated with a portion of the PCI and set only for the serving and non-serving cells used (available) by the UE. The new ID can further reduce the number of bits compared to the PCI.

[0125] (3-3) CSI report configuration ID (CSI-ReportConfigId) (when CSI-ReportConfig corresponds to one or more non-serving cells).

[0126] (3-4) CSI resource configuration ID (CSI-ResourceConfigId) (when CSI-ResourceConfigId corresponds to one or more non-serving cells).

[0127] (3-5) A bitmap showing activation / deactivation of each non-serving cell. The size (number of bits) of the bitmap can be the same as the number of non-serving cells configured on the CC. For example, if the second non-serving cell among three non-serving cells is activated, "010" is set.

[0128] At least one of the information included in the MAC CE may also be included in the DCI. Alternatively, at least one of the serving cells activated by the MAC CE may also be indicated by the DCI. The MAC CE / DCI may also include a field indicating the TCI status / SSB / CSI-RS from a cell with a different PCI, enabling identification of the DL beam monitored by the UE in the target cell (the changed serving cell). The UE may also use this TCI status / SSB / CSI-RS to generate and transmit a beam report (CSI report).

[0129] [[Option 2-2]]

[0130] The UE may also receive a MAC CE with a new 1-bit field "C" added to the existing MAC CE. This field indicates whether the serving cell is changed. The UE may also receive this MAC CE and determine whether to change the serving cell to another cell based on this field.

[0131] [[Option 2-3]]

[0132] For the MAC CE in option 2-2, further, the fields representing the serving cell index / PCI / other IDs (the new ID of option 2-1 mentioned above, etc.) and the TCI status / SSB / CSI-RS of the target cell (the changed serving cell) may be included in the MAC CE.

[0133] In this way, the indication for the serving cell change is indicated through the MAC CE / DCI, so the UE can appropriately change the serving cell.

[0134] [Serving Cell Switching Example 1]

[0135] Figure 4 This figure illustrates serving cell switching example 1. For example, if the serving cell SpCell#0 of the MCG / SCG is instructed to change the serving cell to candidate cell #0-2 via L1 / L2 signaling, candidate cell #0-2 becomes the new serving cell SpCell#0. Furthermore, for example, if the serving cell SCell#2 of the MCG / SCG is instructed to change the serving cell to candidate cell #2-1 via L1 / L2 signaling, candidate cell #2-1 becomes the new serving cell SCell#2.

[0136] [Serving Cell Switching Example 2]

[0137] RRC / MAC CE can set a global candidate cell ID (cell#0, ..., 5) for each cell group, each frequency band, each frame, and each UE. The UE can also be instructed to switch the serving cell based on this global candidate cell ID.

[0138] Figure 5 FIG2 is a diagram showing a serving cell switching example 2. Figure 3A Similarly, a pool of multiple candidate cells is set up, and the serving cell can be switched to any (activated) candidate cell in the pool through L1 / L2 signaling. In this case, the set candidate cell can be either an SpCell or a Sell based on L1 / L2 signaling.

[0139] The UE may also receive an indication of a change of serving cell (from cell #2-1 to candidate cell 4) via MAC CE / DCI. Then, the indicated candidate cell #4 becomes the SpCell of the new cell group.

[0140] [Serving Cell Switching Example 3]

[0141] RRC / MAC CE can set global candidate cell IDs (cell #0-1, #0-1, ..., 2-2) for each cell group, each frequency band, each FR, and each UE. The UE can also be instructed to switch the serving cell using this global candidate cell ID.

[0142] Figure 6 This figure illustrates serving cell switching example 3. The UE receives an indication of a serving cell change (from cell #2-0 to cell #2-1) via MAC CE / DCI. The indicated cell #2-1 becomes the SpCell of the new cell group. Furthermore, the cells in the same cell group as the indicated cell #2-1 (cell #0-0, cell #1-0) become Scell ​​#1 and Scell ​​#2. In other words, the serving cell group is switched.

[0143] (CSI report settings)

[0144] Figure 7 This is a diagram showing an overview of the CSI reporting configuration of RRC. Figure 7 The CSI report configuration of RRC in 3GPP Rel.17 is shown. Figure 7 As shown, the CSI report configuration (CSI-ReportConfig) includes channel measurement resource settings (resourcesForChannelMeasurement), CSI-IM resource information for interference measurement (csi-IM-resourcesForInterference), NZP-CSI-RS resource information for interference measurement (nzp-CSI-RS-resourcesForInterference), and report quantity (Report quantity). "resourcesForChannelMeasurement", "csi-IM-resourcesForInterference", and "nzp-CSI-RS-resourcesForInterference" correspond to the CSI resource configuration "CSI-ResourceConfig".

[0145] Figure 8 This is a diagram showing part of the CSI resource configuration of Rel.17. Figure 8As shown, the CSI resource configuration (CSI-ResourceConfig) includes the "csi-SSB-ResourceSetList." The "csi-SSB-ResourceSetList" is a list of reference destinations (Japanese: "reference first") of SSB resources used for CSI measurement and reporting within the CSI-RS resource set. The "csi-SSB-ResourceSetListExt-r17" element is used to append elements to the "csi-SSB-ResourceSetList" when the number of reporting groups (nrofReportedGroups-r17) is set in the CSI reporting configuration.

[0146] Figure 9 FIG1 is a diagram showing a portion of the CSI-SSB resource set of Rel.17. Figure 9 As shown, the CSI-SSB-ResourceSet includes "servingAdditionalPCIList-r17".

[0147] "servingAdditionalPCIList-r17" indicates the physical cell ID (PCI) of the SSBs included in the csi-SSB-ResourceList. If this parameter is present, this list has the same number of elements as the csi-SSB-ResourceList. The first entry in this list indicates the PCI value for the first entry in the csi-SSB-ResourceList, the second entry in this list indicates the PCI value for the second entry in the csi-SSB-ResourceList, and the same applies to the following entries. For each entry, if the value is zero, the PCI is the PCI of the serving cell in which the CSI-SSB-ResourceSet is defined. Otherwise (if the value of each entry is other than zero), the value of each entry is additionalPCIIndex-r17 of SSB-MTC-AdditionalPCI-r17 in additionalPCIList-r17 of the serving cell configuration (ServingCellConfig), and the PCI is the additionalPCI-r17 of this SSB-MTC-AdditionalPCI-r17.

[0148] Figure 10This figure shows the settings related to L3 measurement / reporting in Rel.17. The associatedMeasGapSSB-r17 field indicates the associated measurement gap used for SSB measurement of the measurement object identified by ssb-ConfigMobility. When multiple MeasObjectNRs with the same SSB frequency are configured, the network sets the same measurement gap ID for each MeasObjectNR in this field. If this field is not present, the associated measurement gap is the gap configured via gapFR1, gapFR2, or gapUE.

[0149] associatedMeasGapCSIRS-r17 indicates the associated measurement gap for CSI-RS measurement of the measurement object identified by csi-rs-ResourceConfigMobility. If this field is not present, the associated measurement gap is a gap configured via gapFR1, gapFR2, or gapUE.

[0150] Enhancements to L1 Measurement Reporting for L1 / L2 Inter-Cell Mobility

[0151] When the RS (mainly SSB) of the serving cell and non-serving cell are set in the same CSI reporting setting (or the same CSI resource setting), the UE can report by adding several indicators representing the serving / non-serving cell in addition to the existing reporting content.

[0152] When new RRC parameters are configured, the UE may report the L3-RSRP value (per beam / cell / multi-beam) in addition to the SSB index / CRI and L1-RSRP / L1-SINR values.

[0153] <Event-triggered L1 beam reporting for L1 / L2 inter-cell mobility>

[0154] One or more existing events used for RRM in TS38.331 can also be reused to trigger non-periodic L1 beam reporting. To trigger non-periodic L1 beam reporting, one or more new / separate events can also be defined. L1 beam reporting can also be triggered by any combination of two or more events. The event can also be any of the following events A2 to A6 and I1. In events A2 to A6, the measurement result can also be the measurement result of at least one of RSRP (L1-RSRP / L3-RSRP), RSRQ, and SINR (RS-SINR).

[0155] Event A2: The measurement result of the serving cell is worse than the threshold.

[0156] Event A3: The measurement result of an adjacent cell (a value obtained by adding an offset to the measurement result) is better than the measurement result of the SpCell (a value obtained by adding an offset to the measurement result).

[0157] Event A4: The measurement result of an adjacent cell (a value obtained by adding an offset to the measurement result) is better than a threshold.

[0158] Event A5: The measurement result of the SpCell is worse than a first threshold, and the measurement result of an adjacent cell (a value obtained by adding an offset to the measurement result) is better than a second threshold.

[0159] Event A6: The measurement result of an adjacent cell (a value obtained by adding an offset to the measurement result) is better than the measurement result of the serving cell (secondary cell, Secondary Cell (SCell)) (a value obtained by adding an offset to the measurement result).

[0160] Event I1: The measurement result of interference is higher than a threshold.

[0161] (Extension of CSI report)

[0162] (Analysis)

[0163] In inter-cell mobility, handover of the SpCell / SCell to candidate cells at any frequency is supported, and thus it is preferably corresponding to L1 beam measurements (inter-frequency measurements) at multiple frequencies. However, the L1 beam measurement / reporting set based on the existing CSI report only supports the setting of the RS at the same frequency as the serving cell.

[0164] Figure 11 It is a diagram showing an example of the RSRP values at multiple frequencies. Figure 11 It shows that for each of the cells at different frequencies (SpCell#0, SCell#1, SCell#2), different RSRP values (RSRP value#0-1, 1-1, 2-1) are measured. How to perform the setting related to the L1 beam measurement / reporting and how to perform the measurement / reporting in such a case are described.

[0165] (Extension of CSI measurement / reporting setting (1))

[0166] To support the frequency setting for L1 beam measurements (CSI measurements) using reference signals (RS) (SSB / CSI-RS), the extension of the CSI measurement / reporting setting is described. For example, the UE may also receive at least one of the channel state information (CSI) report setting and the CSI resource setting indicating one or more frequencies, and control the CSI measurement and CSI reporting using the reference signal (RS) in one or more of these frequencies.

[0167] [Option 1]

[0168] At least one of the CSI report configuration (CSI-ReportConfig) and the CSI resource configuration (CSI-ResourceConfig) may also include a frequency configuration (e.g., Absolute radio-frequency channel number (ARFCN) -ValueNR)) corresponding to a reference signal for measurement (e.g., SSB / CSI-RS). ARFCN-ValueNR is used to indicate the ARFCN, which is applied to the NR global frequency grid (Raster) for downlink, uplink, or bidirectional (TDD). Each CSI report configuration / CSI resource configuration corresponds to one frequency. In order to support L1 beam measurement / reporting in multiple frequencies, multiple CSI report configurations are required. When ARFCN-ValueNR is not present in the CSI report configuration, it may also mean the same frequency as the current serving cell configuration.

[0169] Figure 12 This figure shows an example of CSI-SSB-ResourceSet of Option 1, which is an extension of L1 measurement / reporting configuration. CSI-SSB-ResourceSet is included in CSI reporting configuration and CSI resource configuration. Figure 12 The setting of the SSB frequency (ssbFrequency) corresponding to ARFCN-ValueNR is included.

[0170] [Option 2]

[0171] At least one of the CSI report configuration and the CSI resource configuration can also support different frequencies for each SSB / CSI-RS / PCI (e.g., ARFCN-ValueNR). Each CSI resource configuration / each CSI report configuration can also support L1 beam measurement / reporting across multiple frequencies. In this case, RSRP comparison is intra-frequency, so the beam reporting quantity setting and beam selection rules need to be refined. Inter-frequency comparisons are typically performed based on SINR / RSRQ. SINR / RSRQ will be discussed later.

[0172] Figure 13 This figure shows an example of CSI-SSB-ResourceSet of Option 2, which is an extension of L1 measurement / reporting configuration. CSI-SSB-ResourceSet is included in CSI reporting configuration and CSI resource configuration. Figure 13It includes a list of SSB frequencies (ssbFrequencyList-r18) and the setting of SSB frequencies (ssbFrequency).

[0173] The frequencies for beam measurement / reporting can also be set / indicated via MAC CE / DCI. For example, it can also be that a list of multiple frequencies is set via RRC (CSI report setting / CSI resource setting), and one or more frequencies in the list are set / indicated via MAC CE / DCI. The multiple frequencies can also be the frequencies of serving cells and candidate cells.

[0174] Based on the extension of the L1 measurement / reporting setting as above, one or more frequencies for beam measurement / reporting can be appropriately set.

[0175] <Extension of CSI Measurement / Reporting Setting (2)>

[0176] Next, the case where the CSI resource setting / CSI report setting supports L1 beam (CSI) measurement / reporting for multiple frequencies is described. The UE receives the setting / indication for the RS (SSB / CSI-RS) received in multiple frequencies in the CSI resource setting / CSI report setting, and uses this RS for CSI (L1-RSRP / L1-SINR) measurement and reporting.

[0177] The UE can also control (or send) the transmission of a CSI report including both the layer 1 reference signal received power (Reference SignalReceived Power) (L1-RSRP) and the layer 1 signal to interference plus noise ratio (Signal to Interference plusNoise Ratio) (L1-SINR). The UE can also control (or send) the transmission of a CSI report including the CSI (L1-RSRP / L1-SINR) measurement results in multiple frequencies.

[0178] The UE can also set the reporting quantity (quantity) for both L1-RSRP and L1-SINR in order to report both for beam indices. Either the beam with the maximum L1-RSRP and L1-SINR can be configured at the beginning of the CSI report or it can be explicitly stated. Differential quantization can also be performed for each of the L1-RSRP value and L1-SINR value. In order to select a beam for reporting, the UE can compare the L1-RSRP of each frequency.

[0179] Figure 14 It is a figure showing an example of a CSI report in multiple frequencies. In Figure 14 In the example, the CSI report includes the maximum absolute value of L1-RSRP (L1-RSRP #1) and its differences from this absolute value (Differential RSRP #2, #3, and #4). Furthermore, the CSI report includes the maximum absolute value of L1-SINR (L1-SINR #3) and its differences from this absolute value (Differential RSRP #1, #2, and #4). Furthermore, the CSI report includes an indication of the beam with the maximum L1-SINR at the beginning (first line). In this example, Beam #3 is indicated as the beam with the maximum L1-SINR.

[0180] When measuring RSs on multiple frequencies to select the beam to report, the UE may first compare the L1-RSRP of the same frequency and then compare the L1-SINR between different frequencies. Alternatively, the UE may first compare the L1-SINR between different frequencies and then compare the L1-RSRP of the same frequency.

[0181] Figure 15 : is a diagram showing an example of a CSI measurement / reporting method in multiple frequencies. Figure 15 In this example, CSI reporting is performed for cells with different frequencies (SpCell#0, SCell#1, and SCell#2). In this example, each cell has 64 beams (SSBs), so the UE measures the L1-RSRP and L1-SINR for 64×3 beams. In this example, SSB#3 in Scell#1 has the highest L1-RSRP, followed by SSB#1 in SpCell#0. The UE reports the difference between the absolute value of the L1-RSRP for SSB#3 in Scell#1 and the L1-RSRP for SSB#1 in SpCell#0.

[0182] For RS / Cells configured in the CSI reporting configuration, for example, in SpCells, all candidate cells for serving cell switching can be configured in the CSI reporting configuration during L1 measurement. Furthermore, the NW (base station) can determine whether to perform a cell switching based on the L1 measurement and reporting results.

[0183] The CSI report may include information indicating the frequency at which the RS to be measured for L1-RSRP / L1-SINR is transmitted or PCI.

[0184] As described above, in a CSI report, both L1-RSRP and L1-SINR can be reported. In addition, in a CSI report, CSI measurement results (L1-RSRP / L1-SINR) of multiple frequencies can be reported. Generally, interference varies according to frequency (CC), so L1-SINR becomes different values. If the above example is applied, the UE can report L1-SINR of different frequencies, so the NW can, for example, grasp the L1-SINR of the candidate cells to be switched.

[0185] When CSI measurement / reporting in multiple frequencies is used for the setting of inter-cell CSI measurement / reporting, the structures of STMC and MG for the settings of frequency, PCI, specific RS of PCI, UE, and CSI resources can also be added to the CSI report setting.

[0186] <L3 Measurement / Report>

[0187] The UE can also receive: the setting information that includes the setting for beam (CSI) measurement / reporting based on the reference signal (SSB / CSI-RS) of layer 1 (L1) and is used for the measurement / reporting of layer 3 (L3). Also, the UE can control the measurement / reporting of L1 and L3 based on this setting information. For example, as Figure 10 shown, MeasObjectNR, which is the setting information related to L3 measurement / reporting, can also include the frequency setting for RRM measurement (e.g., ARFCN-ValueNR).

[0188] [Option 1]

[0189] It can also include an indication of whether the setting information (MeasObjectNR) related to L3 measurement / reporting is for the previous L3RRM measurement or for L1 beam measurement. When L1 beam measurement is indicated, this setting information can also include certain settings for L1 measurement / reporting in the CSI report setting (e.g., the reporting quantity).

[0190] [Option 2]

[0191] For L1 beam measurement / reporting, the setting information (MeasObjectNR) related to one L3 measurement / reporting can also include the settings of multiple frequencies and the PCI / RS corresponding to different frequencies. The L1 measurement results and the L3 measurement results can be set to be reported in separate CSI reports or in one CSI report.

[0192] [CSI Report]

[0193] The UE can also report L3 measurement results (L3-RSRP values for each beam / cell / multi-beam) in the L1 beam report (CSI report) between frequencies (multiple frequencies). Alternatively, the UE can also report L1 measurement results in the report of L3 measurement results. The UE can also report L1 measurement results in the RRC IE or MAC CE.

[0194] The L1 measurement / report between frequencies (multiple frequencies) can also be set to be event-triggered. For example, when a specific event occurs, the UE can also perform the L1 measurement / report between frequencies (multiple frequencies).

[0195] As a variant, the UE can also receive: the setting information (CSI report setting / CSI resource setting) for the beam measurement / report based on L1 SSB / CSI-RS, which includes the setting for the measurement / report for layer 3 (L3).

[0196] As described above, the settings for layer 1 and layer 3 can be aggregated, and the signaling overhead can be suppressed. When this embodiment is used for the setting of the L1 measurement / report between cells, the settings of STMC and MG for the L3 measurement of MeasObjectNR can be reused for the L1 measurement.

[0197] (L1 beam measurement / report in the case of supporting inter-frequency cell handover)

[0198] In Figure 5 the example shown, in the case of supporting inter-frequency cell handover, it is preferable to perform CSI measurement / report between different frequencies based on one setting information. Otherwise, the gNB needs to independently set the L1 beam measurement / report for each frequency in order to obtain the beam quality of cells from different frequencies. Furthermore, in order to compare the beam quality of different frequencies, the report of only L1-RSRP or only L1-SINR may not be sufficient. That is, both L1-RSRP and L1-SINR may be required. By appropriately performing CSI measurement / report between different frequencies, the overhead for obtaining the best beam / cell in different frequencies for setting / reporting can be reduced.

[0199] In Figure 14 etc., the CSI report for multiple frequencies has been described. Hereinafter, examples of CSI measurement / report (measurement / report of L1-RSRP / L1-SINR) for multiple frequencies will be further specifically described.

[0200] <Measurement / Report of L1-RSRP / L1-SINR (1)>

[0201] An example of a CSI resource configuration (CSI-ResourceConfig) / CSI report configuration (CSI-ReportConfig) in the case of supporting L1 beam measurement / reporting (eg, L1 beam measurement / reporting) of a cell with one or more frequencies will be described.

[0202] Inter-cell mobility supports handover of the SpCell / SCell to a candidate cell (or additional cell, target cell) on any frequency. Therefore, L1 beam measurements (inter-frequency measurements) for multiple frequencies are also supported. L1 beam measurements / reports (or CSI measurements / reports) for multiple frequencies (or frequency domains) may include at least one of the Layer 1 Reference Signal Received Power (L1-RSRP) and the Layer 1 Signal to Interference plus Noise Ratio (L1-SINR).

[0203] The UE may also receive information related to the CSI resource settings / CSI report settings of one or more candidate cells corresponding to different frequencies, and based on the information, perform a CSI report / beam report including at least one of the L1-RSRP and L1-SINR of each candidate cell.

[0204] For example, the UE may also perform a CSI report including one of L1-RSRP and L1-SINR, or both L1-RSRP and L1-SINR for a certain cell (e.g., a candidate cell) or a certain frequency (e.g., a frequency corresponding to a candidate cell) (see Figure 14 ). Figure 14 An example is shown in which a certain CSI report (for example, CSI report #n) includes both L1-RSRP and L1-SINR.

[0205] The beam selection rules (or the rules for selecting the CSI to be reported) can be pre-defined in the specification or set through RRC signaling. Beam selection (or the selection of the CSI to be reported) can also be based on both L1-RSRP and L1-SINR.

[0206] The UE may also perform beam selection (or selection of CSI to be reported) based on specific higher-layer parameters. For example, the specific higher-layer parameter may be the reporting quantity (e.g., reportQuantity) included in the CSI reporting configuration (e.g., CSI-ReportConfig). Furthermore, when either L1-RSRP or L1-SINR is configured using specific higher-layer parameters, the UE may control the inclusion of the configured one in the CSI report and the exclusion of the other.

[0207] For example, the UE may also determine beam selection (or CSI to be reported) based on at least one of the following options 1-1 to 1-3.

[0208] [Option 1-1]

[0209] In order to report both L1-RSRP and L1-SINR for a beam index (or CSI index), it is also possible to support the setting of both L1-RSRP and L1-SINR through a specific higher layer parameter (eg, reportQuantity).

[0210] For example, when both L1-RSRP and L1-SINR are configured by specific higher layer parameters, the UE reports CSI including L1-RSRP and L1-SINR.

[0211] Alternatively, even when both L1-RSRP and L1-SINR are configured, the amount of CSI reported may be reduced (or certain CSI reports may not be performed) if specific conditions are met. Alternatively, the overhead of CSI reporting may be reduced based on at least one of the following options 1-1A and 1-1B.

[0212] Option 1-1A

[0213] The UE may also determine the report content (or the measurement result included in the CSI) based on at least one of the L1-RSRP measurement result and the L1-SINR measurement result. For example, the UE may also determine whether to report both L1-RSRP and L1-SINR (or whether to report only one) based on at least one of the L1-RSRP measurement result and the L1-SINR measurement result. When only one of L1-RSRP and L1-SINR is to be reported, the UE may also determine which measurement result to report based on the L1-RSRP measurement result and the L1-SINR measurement result.

[0214] Alternatively, the UE may always include the measurement result of one (e.g., L1-RSRP) in the CSI, and determine whether to report the measurement result of the other (e.g., L1-SINR) based on at least one of the measurement result of L1-RSRP and the measurement result of L1-SINR.

[0215] The UE may also indicate the measurement result to be reported. For example, when reporting only one of L1-RSRP and L1-SINR, the UE may also indicate which measurement result to report. For example, a specific field included in the CSI may be used to indicate the measurement result to be reported.

[0216] Option 1-1B

[0217] The UE may also report both L1-RSRP and L1-SINR for a specific beam / cell, and report only one of L1-RSRP and L1-SINR for other beams / cells (or remaining beams / cells). In the present disclosure, the specific beam / cell may also be the best beam / cell, the beam / cell with the highest quality, the beam / cell with the highest L1-RSRS, or the beam / cell with the highest L1-SINR. The beam may also be a reference signal resource index (e.g., CRI / SSBRI).

[0218] In Option 1-1A / Option 1-1B, when selecting (or reporting) both / only one of L1-RSRP and L1-SINR, the UE may autonomously determine the reporting content or have the reporting content determined based on specific rules. For example, the specific rule may include reporting measurement results that exceed a threshold set / defined for L1-RSRP and a threshold set / defined for L1-SINR. The L1-RSRP threshold and the L1-SINR threshold may also be separately set via higher layer signaling.

[0219] In this way, even when reporting of both L1-RSRP and L1-SINR is configured / defined, by allowing / supporting reporting of only one based on specific conditions, an increase in CSI reporting overhead can be suppressed.

[0220] [Option 1-2]

[0221] It is also possible to support the setting / indication of only one of L1-RSRP and L1-SINR through a specific higher-layer parameter (e.g., reportQuantity) / DCI. The UE can also be controlled to report the measurement result (one of L1-RSRP and L1-SINR) that is set / indicated.

[0222] [Options 1-3]

[0223] It is also possible to support the setting / indication of only one of L1-RSRP and L1-SINR through specific higher-layer parameters (e.g., reportQuantity) / DCI. The UE can also report both L1-RSRP and L1-SINR for a specific beam / cell, and report the measurement results (only one of L1-RSRP and L1-SINR) set / indicated by the higher-layer parameter / DCI for other beams / cells (or, the remaining beams / cells).

[0224] A specific cell can be determined by the UE autonomously or set through higher-layer parameters. Alternatively, when the measurement results of CSI reports (L1-RSRP or L1-SINR) not set in the higher layer exceed a predefined / set threshold, it is also possible to perform the CSI report that has not been set.

[0225] In this way, even when only one of L1-RSRP and L1-SINR is set / defined for reporting, by allowing / supporting the reporting of both L1-RSRP and L1-SINR for a specific cell, it is possible to perform a detailed CSI report for a specific beam / cell.

[0226] [UE Capability]

[0227] When supporting L1 beam (or, CSI) measurement / reporting for cells of multiple frequencies through CSI resource setting (CSI-ResourceConfig) / CSI report setting (CSI-ReportConfig), UE capabilities related to the number of cells (or, the number of beams, the number of CSIs) set / reported can also be introduced. For example, UE capabilities related to the number of cells (or, the number of beams, the number of CSIs) set / reported per CSI resource setting / per CSI report setting / per frequency can also be supported. Alternatively, UE capabilities related to the number of cells (or, the number of beams, the number of CSIs) set / reported across CSI resource settings / CSI report settings / frequencies can also be supported.

[0228] <Measurement / Reporting of L1-RSRP / L1-SINR (2)>

[0229] Another example of CSI resource setting (CSI-ResourceConfig) / CSI report setting (CSI-ReportConfig) in the case of supporting L1 beam measurement / reporting (e.g., L1 beam measurement / reporting) for cells of one or more frequencies is described. The following examples can also be combined and applied with the measurement / reporting of L1-RSRP / L1-SINR (1).

[0230] When L1 beam measurement / reporting for a cell with a certain frequency is supported via CSI resource configuration (CSI-ResourceConfig) / CSI reporting configuration (CSI-ReportConfig), the CSI resource configuration / CSI reporting configuration may also include frequency-related information (e.g., frequency configuration). L1 beam measurement / reporting may also be rewritten as CSI measurement / reporting.

[0231] The frequency setting may also be a frequency setting (e.g., Absolute radio-frequency channel number (ARFCN) -ValueNR) corresponding to a reference signal for measurement (e.g., SSB / CSI-RS). ARFCN-ValueNR is used to indicate an ARFCN that is applied to the NR global frequency grid for downlink, uplink, or bidirectional (TDD). Each CSI report setting / CSI resource setting corresponds to one frequency. In order to support L1 beam measurement / reporting in multiple frequencies, multiple CSI report settings are required. In the case where ARFCN-ValueNR is not present in the CSI report setting, it may also mean the same frequency as the current serving cell setting.

[0232] A frequency configuration (e.g., frequency configuration) indicating the frequency for CSI measurement / reporting and a reporting quantity (e.g., reportQuantity) indicating the content of CSI measurement / reporting (e.g., L1-RSRP, L1-SINR) may also be configured for the UE. The configuration and reporting of the reporting quantity may also apply to the structure described in the first embodiment.

[0233] For example, a single CSI reporting configuration (or each CSI reporting configuration) may include a frequency configuration (e.g., frequency configuration) and a reporting quantity (e.g., reportQuantity). Alternatively, a configuration may be supported in which both L1-RSRP and L1-SINR measurement / reporting are configured for a certain cell (or frequency), while only one of these is configured for another cell (or frequency). The UE controls CSI measurement / CSI reporting based on the frequency configuration (e.g., frequency configuration) and the reporting quantity (e.g., reportQuantity).

[0234] For example, the UE may also determine beam selection (or CSI to be reported) based on at least one of the following options 2-1 to 2-3.

[0235] [Option 2-1]

[0236] In order to report both L1-RSRP and L1-SINR for a beam index (or CSI index) of a certain cell (or a certain frequency), the settings of both L1-RSRP and L1-SINR may be supported through specific higher layer parameters (eg, reportQuantity).

[0237] For example, when both L1-RSRP and L1-SINR are configured for a certain cell or frequency through specific higher-layer parameters (e.g., frequency configuration and reporting quantity (e.g., reportQuantity)), the UE reports CSI including the L1-RSRP and L1-SINR corresponding to the frequency.

[0238] Alternatively, if certain conditions are met, the amount of CSI reported may be reduced (or certain CSI reports may not be performed). The overhead of CSI reporting may also be reduced based on at least one of the following options 2-1A and 2-1B.

[0239] Option 2-1A

[0240] The UE may also determine the report content (or the measurement result included in the CSI) based on at least one of the L1-RSRP measurement result and the L1-SINR measurement result. For example, the UE may also determine whether to report both L1-RSRP and L1-SINR based on at least one of the L1-RSRP measurement result and the L1-SINR measurement result. When only one of L1-RSRP and L1-SINR is to be reported, the UE may also determine which measurement result to report based on the L1-RSRP measurement result and the L1-SINR measurement result.

[0241] Alternatively, the UE may always include the measurement result of one (e.g., L1-RSRP) in the CSI, and determine whether to report the measurement result of the other (e.g., L1-SINR) based on at least one of the measurement result of L1-RSRP and the measurement result of L1-SINR.

[0242] The UE may also indicate the measurement result to be reported. For example, when reporting only one of L1-RSRP and L1-SINR, the UE may also indicate which measurement result to report. For example, a specific field included in the CSI may be used to indicate the measurement result to be reported.

[0243] Option 2-1B

[0244] The UE may also report both L1-RSRP and L1-SINR for a specific beam / cell, and report only one of L1-RSRP and L1-SINR for other beams / cells (or remaining beams / cells). In the present disclosure, the specific beam / cell may also be the best beam / cell, the beam / cell with the highest quality, the beam / cell with the highest L1-RSRS, or the beam / cell with the highest L1-SINR.

[0245] In Option 2-1A / Option 2-1B, when selecting (or reporting) both / only one of L1-RSRP and L1-SINR, the UE may autonomously determine the reporting content or have the reporting content determined based on specific rules. For example, the specific rules may include reporting measurement results that exceed a threshold set / defined for L1-RSRP and a threshold set / defined for L1-SINR. The L1-RSRP threshold and the L1-SINR threshold may also be separately set via higher layer signaling.

[0246] In this way, even when reporting of both L1-RSRP and L1-SINR is configured / defined, by allowing / supporting reporting of only one based on specific conditions, an increase in CSI reporting overhead can be suppressed.

[0247] [Option 2-2]

[0248] It is also possible to support the setting / indication of only one of L1-RSRP and L1-SINR for a certain cell or frequency through specific higher-layer parameters (e.g., frequency configuration and reporting quantity (e.g., reportQuantity)) / DCI. The UE can also be controlled to report the measurement result (one of L1-RSRP and L1-SINR) that is set / indicated.

[0249] [Option 2-3]

[0250] The configuration / indication of only one of L1-RSRP and L1-SINR may be supported for a certain cell or frequency through specific higher-layer parameters (e.g., frequency configuration and reporting quantity (e.g., reportQuantity)) / DCI. The UE may also report both L1-RSRP and L1-SINR for a specific beam / cell / frequency, and report the measurement result (only one of L1-RSRP and L1-SINR) configured / indicated by the higher-layer parameters / DCI for other beams / cells / frequencies (or the remaining beams / cells / frequencies).

[0251] The specific cell can be determined autonomously by the UE or configured via higher-layer parameters. Alternatively, when the measurement result of a CSI report (L1-RSRP or L1-SINR) not configured in the higher layers exceeds a predefined / configured threshold, the unconfigured CSI report can also be performed.

[0252] In this way, even when reporting of only one of L1-RSRP and L1-SINR is configured / defined, by allowing / supporting reporting of both L1-RSRP and L1-SINR for a specific cell, detailed CSI reporting can be performed for a specific beam / cell.

[0253] (analyze)

[0254] As described above, when multiple TRPs are applied, the serving cell may be switched to a cell (additional cell / candidate cell) with a different PCI from the serving cell through signaling of at least one of layer 1 and layer 2 (L1 / L2 inter-cell mobility).

[0255] However, when the frequencies of each PCI differ, it is unclear how to configure CSI measurement and reporting (e.g., L1-RSRP and L1-SINR) for each frequency / cell, or how to perform measurement or reporting. If CSI measurement and reporting for multiple frequencies / cells is not performed appropriately, there is a concern that this could lead to problems such as decreased communication throughput.

[0256] For example, details of comparison, selection, quantization, etc. of RSs when RSs corresponding to a serving cell, multiple candidate cells, and multiple frequencies are configured are not clear.

[0257] Therefore, the inventors of the present invention have conceived of a terminal, a wireless communication method, and a base station that appropriately perform CSI measurement and reporting in multiple frequencies / cells.

[0258] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the respective embodiments may be applied individually or in combination.

[0259] In the present disclosure, "A / B" and "at least one of A and B" may be replaced with each other. In addition, in the present disclosure, "A / B / C" may also mean "at least one of A, B, and C."

[0260] In the present disclosure, the words “notify,” “activate,” “deactivate,” “indicate,” “select,” “configure,” “update,” and “determine” may be used interchangeably. In the present disclosure, the words “support,” “control,” “controllable,” “operate,” and “operable” may also be used interchangeably.

[0261] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-layer parameters, fields, Information Elements (IEs), and settings may also be overwritten. In this disclosure, Medium Access Control (MAC) Control Elements (CEs), update commands, and activation / deactivation commands may also be overwritten.

[0262] In the present disclosure, high-layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (for example, positioning protocols (for example, NR Positioning Protocol A (NRPPa)) / LTE Positioning Protocol (LTE Positioning Protocol (LPP))) messages, etc., messages from the core network), or any one or a combination thereof.

[0263] In the present disclosure, MAC signaling may include, for example, a MAC Control Element (MACCE) and a MAC Protocol Data Unit (PDU). Broadcast information may include, for example, a Master Information Block (MIB), a System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), and other system information (Other System Information (OSI)).

[0264] In the present disclosure, the physical layer signaling may also be, for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI)), etc.

[0265] In this disclosure, the terms cell group, serving cell group, master cell group (MCG), and secondary cell group (SCG) can be interchanged. L1 / L2, L1 / L2 signaling, and DCI / MAC CE can also be interchanged. The term "serving cell" can also be replaced by the cell that transmits the PDSCH. The term "candidate cell" can also refer to a cell that becomes a candidate for the serving cell through L1 / L2 inter-cell mobility.

[0266] In the present disclosure, the terms "cell," "PCI," "serving cell," "source serving cell," "source cell," "CC," "BWP," "BWP within a CC," and "frequency band" may be overwritten. In the present disclosure, the terms "cell," "PCI," "cell with additional PCI," "additional cell," "other cell," "non-serving cell," "cell with a different PCI," "candidate cell," "candidate serving cell," "cell with a different PCI than the current serving cell," "other serving cell," and "target cell" may be overwritten. In the present disclosure, the terms "handover," "change," and "update" may be overwritten. The serving cell may also be overwritten with the serving cell before the handover or the serving cell after the handover.

[0267] In this disclosure, the terms beam measurement / report, L1 beam measurement / report, L1 measurement / report, and CSI measurement / report may be interchangeable. L1 may also represent at least one of L1-RSRP and L1-SINR. RS may also represent at least one of CSI-RS and SSB. L1-RSRP and L1-SINR may also be interchangeable. RS, beam, SSB, SSB index, SSBRI (SS / PBCH Block Resource Indicator), CSI-RS index, and CRI (CSI-RS Resource Indicator) may also be interchangeable.

[0268] In the present disclosure, events and conditions can also be overwritten with each other. In the present disclosure, cells and frequencies can also be overwritten with each other.

[0269] (Wireless Communication Method)

[0270] The UE measures at least one of the following: the reference signal (RS) across one or more frequencies or cells, or the Layer 1 reference signal received power (RSRP) and the L1 signal to interference plus noise ratio (SINR) for each frequency or cell. The UE transmits a channel state information (CSI) report containing at least one of the L1 RSRP and L1 SINR. These processes are described in detail in various embodiments below.

[0271] <0th embodiment>

[0272] In Rel. 18, the following scenarios and configurations are considered for CSI reporting in inter-cell mobility triggered by L1 / L2. In each scenario, the quantities used for measurement and beam comparison / selection (L1-RSRP / L1-SINR quantities) and the quantities used for CSI reporting can be specified in the specification or configured separately or publicly by the base station (NW) through higher layer signaling / physical layer signaling. In the following examples, "beam" can be rewritten to mean at least one of RS, cell, and frequency.

[0273] [Scenario 1]

[0274] The UE measures and selects a beam based on the L1-RSRP and reports the L1-RSRP of the selected beam.

[0275] [Scenario 2]

[0276] The UE measures and selects a beam based on the L1-SINR and reports the L1-SINR of the selected beam.

[0277] [Scenario 3]

[0278] The UE measures and selects a beam based on both L1-RSRP and L1-SINR, and reports only the L1-RSRP of the selected beam.

[0279] [Scenario 4]

[0280] The UE measures and selects a beam based on both L1-RSRP and L1-SINR, and reports only the L1-SINR of the selected beam.

[0281] [Scenario 5]

[0282] The UE measures and selects a beam based on both L1-RSRP and L1-SINR, and reports both L1-RSRP and L1-SINR of the selected beam.

[0283] [Scenario 6]

[0284] Based on the settings from the base station, the UE adds the result obtained by filtering in the time domain / beam domain or the L3 result to either or both of the L1-RSRP and L1-SINR and reports them.

[0285] Regarding the number of reference signals (RSs) configured, the UE may transmit at least one of the following options a through e as UE capability information. The configuration range for options a through e may also be at least one of the following: per CSI report configuration, per multiple CSI report configurations, per time slot, or per UE.

[0286] [Option a] The maximum number of RSs configured across all cells and all frequencies.

[0287] [Option b] The maximum number of RSs set for each cell / candidate cell.

[0288] [Option c] The maximum number of RSs to be configured per frequency.

[0289] [Option d] is the maximum number of frequencies to be set.

[0290] [Option e] The maximum number of cells / candidate cells to be set per frequency / per multiple frequencies.

[0291] <First embodiment>

[0292] Regarding the number of RSs reported by the UE based on the CSI reporting configuration, the base station (NW) may also configure (transmit) at least one of the following options to the UE via higher layer signaling or physical layer signaling, based on the corresponding UE's capability report and regulatory restrictions. The UE may also generate and transmit a CSI report based on this configuration.

[0293] [Option 1] Number of RSs across all cells and the entire frequency.

[0294] [Option 2] Number of RSs per cell / candidate cell.

[0295] [Option 3] Number of RS per frequency.

[0296] [Option 4] The number of frequencies selected / reported.

[0297] [Option 5] Number of selected / reported candidate cells per frequency.

[0298] [Option 6] Number of selected / reported candidate cells per multiple frequencies.

[0299] The UE may also replace the “number” in each of the above options with the “maximum number” and send (report) the obtained information to the base station as UE capability information.

[0300] <Second embodiment>

[0301] Regarding CSI (L1 beam) reporting and quantization, the above-mentioned scenario 1 is used as an example to illustrate. The example of this embodiment can also be the same in the case of scenario 2. That is, the RSRP in this embodiment can also be replaced with SINR. The regenerated RS index in this disclosure can also correspond to a candidate cell (additional cell, additional PCI) and be associated with at least one of the set RS indices (SSB index / CSI-RS index / CSI-SSB-resource set ID). In this disclosure, the UE can either receive the regenerated RS index or regenerate the index based on the set RS index.

[0302] [Option 1]

[0303] The UE receives the regenerated RS index and compares, selects, and reports the L1-RSRP for each RS index across multiple frequencies and cells. The first L1-RSRP in the CSI report is the maximum L1-RSRP, quantized using 7 bits. The remaining L1-RSRPs are quantized using 4 bits as the difference from the maximum L1-RSRP.

[0304] The beam selected for reporting may also comply with the restrictions of any of the options in the first embodiment. For example, in Option 2, when two RSs are configured, the UE transmits CSI reports related to two beams (2RS) per cell / candidate cell. For example, in Option 3, when three RSs are configured per frequency, the UE may transmit CSI reports related to three beams (3RS) per frequency.

[0305] like Figure 12 、 Figure 13 As in the example, each RS configured for CSI reporting is associated with a cell index and frequency. Therefore, when the indices of all configured RSs are changed (regenerated), the indices of the regenerated RSs implicitly represent the cell index and frequency, so the UE does not need to report explicit cell indexes and frequencies.

[0306] Figure 16 This is a diagram showing the first example of a re-indexing index. Figure 16 In , F#X represents the frequency index (cell index). That is, the RS index (RS#X) is associated and configured for each frequency (configured RS index). And, the UE sends (reports) the regenerated index (re-indexing index) for each RS index. Figure 16 In the example of , the index is regenerated based on the cell index and the priority of the set RS index. That is, the index is generated in ascending order of the corresponding cell index, and for the same cell index, the index is generated in ascending order of the set RS index.

[0307] Alternatively, the UE may indicate or report more than one cell index or frequency index in the new UCI field. In this case, the UE may not transmit or report all regenerated RS indices for all cell / frequency indices. For example, the new UCI field may indicate the order of frequency indices or cell indices (e.g., {F#1, F#2, F#3}, {CC#1, CC#2, CC#3, CC#4, CC#5, CC#6}). This allows the base station to determine the RS index even without being transmitted the regenerated RS index.

[0308] Alternatively, the regenerated index may be assigned in units of frequency / cell. For example, when four RSs are configured in Cell #1, two bits may be used in the report of Cell #1.

[0309] Figures 17 to 19 is a diagram showing a specific example of a CSI report including a regenerated index. Figures 17 to 19 In the figure, the measurement values ​​of L1-RSRP and the like are omitted, but the corresponding regenerated RS indexes are configured in descending order of L1-RSRP.

[0310] Report Example 1-1

[0311] For example, when a report corresponding to four RSs (beams) across cells / frequencies is configured, the UE Figure 17 The four RSs with the largest L1-RSRP (re-indexing index is #8, #9, #10, #1) transmit CSI reports.

[0312] Report Example 1-2

[0313] For example, when a report corresponding to a total of 4 RSs is configured and a maximum of 2 RSs are configured for each cell, the UE sends a CSI report for 4 RSs (re-indexing index is #8, #9, #1, #12). Figure 18 ). That is, it differs from Report Example 1-1 in the following respects: in order to configure a maximum of 2 RSs per cell, a CSI report for re-indexing index #10 is not sent, and a CSI report for re-indexing index #12 is sent instead.

[0314] Report Examples 1-3

[0315] For example, when a report corresponding to a total of 4 RSs is configured, with a maximum of 2 RSs per cell and a maximum of 3 RSs per frequency, the UE sends a CSI report for 4 RSs (re-indexing index is #8, #9, #1, #17). Figure 19 ). That is, the following aspects differ from reporting example 1-2: In order to configure a maximum of 3 RSs per frequency, a CSI report for re-indexing index #12 is not sent, and a CSI report for re-indexing index #17 is sent instead.

[0316] According to option 1, RSs are compared / selected across multiple cells / multiple frequencies for CSI reporting, so that the best cell / frequency can be determined among the multiple cells / multiple frequencies.

[0317] [Option 2]

[0318] The UE compares / selects the L1-RSRP of the RS index for each frequency and sends a CSI report containing a maximum of N L1-RSRPs per frequency and the corresponding RS index.

[0319] The first L1-RSRP in the CSI report may be the maximum L1-RSRP across all frequencies, quantized with 7 bits. The remaining L1-RSRPs may be the difference from the maximum L1-RSRP and quantized with 4 bits. Alternatively, the strongest (first) L1-RSRP in each frequency may be quantized with 7 bits, and the remaining L1-RSRPs may be quantized with 4 bits as the difference.

[0320] RS index regeneration can also be performed across multiple frequencies, similar to Option 1. Alternatively, RS index regeneration can be configured for each frequency. When regenerating the index for each frequency, the order of reported RSs (beams) can also be, for example, the order of frequency indices (e.g., first RS for F#1, then RS for F#1, then RS for F#1). Alternatively, the UE can explicitly report the frequency index corresponding to the RS for each frequency.

[0321] In Option 2, the UE may also receive a configuration of the number of RSs reported per frequency. This allows the UE to confirm the presence of beams reported from multiple frequencies.

[0322] Report Example 2-1

[0323] When a report corresponding to a maximum of 4 RSs and 2 RSs per frequency is configured, the UE sends a CSI report for 4 RSs (re-indexing index is #8, #9, #17, #18). Figure 20 ). RS #8 and #17 correspond to the maximum value of L1-RSRP for each frequency (F#1, F#2) and are quantized with 7 bits. RS #9 and #18 correspond to the difference value of L1-RSRP for each frequency (F#1, F#2) and are quantized with 4 bits. In addition, the order in the CSI report is not limited to Figure 20 For example, the RS with the maximum L1-RSRP value may be allocated first, followed by the RS with the difference in L1-RSRP value. That is, the RS may be allocated in the order of #8, #17, #9, and #18.

[0324] Report Example 2-2

[0325] When a report corresponding to one RS per frequency is configured, the UE transmits a CSI report for three RSs (re-indexing index is #8, #17, #27). Figure 21 ). That is, only the RS corresponding to the maximum L1-RSRP value for each frequency (F#1, F#2, F#3) is reported. The maximum value of each L1-RSRP is quantized using 7 bits.

[0326] In addition, Figures 17 to 21 In the example of , the arrangement order of RSs and re-indexing indexes in the CSI report is not limited to the order shown in the figure.

[0327] According to option 2, RSs are compared / selected for each frequency for CSI reporting, so the optimal RS / beam can be determined in a specific frequency.

[0328] According to this embodiment, by applying the index regenerated for each CSI report, the number of bits of the RS index to be reported can be reduced.

[0329] <Third embodiment>

[0330] The following scenario is described in detail: the UE measures RS for both L1-RSRP and L1-SINR, selects the RS to be reported, and sends a CSI report containing only L1-RSRP or only L1-SINR of the selected RS (the above scenario 3 or scenario 4). This embodiment can also apply the above-mentioned L1-RSRP / L1-SINR measurement / reporting (1) or (2).

[0331] [Method 3-1]

[0332] The UE measures both L1-RSRP and L1-SINR, and compares RS within each frequency or RS across multiple frequencies. In this case, for example, the following option 1 or option 2 may also be applied.

[0333] Option 1

[0334] (1) The UE may also receive a setting for a threshold value of L1-RSRP / L1-SINR and select only beams (RSs) with measurement results above the threshold value for comparison. For example, the UE may first select RSs with L1-SINR above the threshold value, and then sort the L1-RSRP values ​​for the beams with L1-SINR above the threshold value, reporting X RSs in descending order of L1-RSRP.

[0335] (2) The UE may first compare whether the L1-RSRP is above a threshold, and then, for beams whose L1-RSRP is above the threshold, sort the L1-SINRs and report X RSs in descending order of L1-SINR. X is a set number of RSs, for example, in accordance with any of the settings in options 1 to 6 of the first embodiment.

[0336] (3) The UE selects a beam (RS) with an L1-RSRP higher than a threshold and an L1-SINR higher than a threshold. The UE can also use L1-RSRP or L1-SINR to select the reporting beam in two stages. From the selected RSs, the UE first sorts one of them (L1-RSRP or L1-SINR) per frequency or across multiple frequencies (first step). Then, for a specific number of RSs with a higher ranking, the UE sorts the other one (L1-SINR or L1-RSRP) per frequency or across multiple frequencies (second step), and reports the X RSs with the higher ranking. In addition, the number of RSs selected using L1-RSRP or L1-SINR can also be set by higher layer signaling, specified in the specification, or reported in UE capability information. In addition, the order of RSs in the CSI report can also be reported in descending order of the measured value (L1-RSRP or L1-SINR) in either the first step or the second step.

[0337] Figure 22 This figure shows an example of a CSI report using Option 1 of Method 3-1. For example, in Option 1, an example of applying sorting across multiple frequencies is shown. When the initial comparison is L1-RSRP and the second comparison is L1-SINR, the final order in the CSI report is based on the strength of the L1-SINR. In this case, the RS corresponding to the strongest L1-RSRP may not be configured at the beginning of the CSI report. Alternatively, when the initial comparison is L1-SINR and the second comparison is L1-RSRP, the final order in the CSI report is based on the strength of the L1-RSRP. In this case, the RS corresponding to the strongest L1-SINR may not be configured at the beginning of the CSI report.

[0338] Option 2

[0339] The UE can also first select a specific number (e.g., three) of RSs with high L1-RSRP (or L1-SINR) for each frequency, and then determine the order of L1-SINR (or L1-RSRP) from the selected RSs. For example, in the initial comparison, the UE compares the L1-RSRP of RSs for each frequency and selects three beams for each frequency. The UE then compares the L1-SINR of the selected RSs for each frequency or across multiple frequencies to determine the order.

[0340] Figure 23 This is a diagram showing an example of CSI reporting using Option 2 of Method 3-1. Figure 23 The example shows CSI reporting for three RSs per frequency. The UE first selects a specific number (e.g., three) of RSs with high L1-RSRPs for each frequency. It then determines the order of L1-SINRs from these selected RSs, and uses this order to determine the order of configuration in the CSI report. Alternatively, the UE first selects a specific number (e.g., three) of RSs with high L1-SINRs for each frequency. It then determines the order of L1-RSRPs from these selected RSs, and uses this order to determine the order of configuration in the CSI report.

[0341] [Method 3-2]

[0342] The following example describes CSI (L1 beam) reporting and quantization. While the following example uses Case 3, Case 4 is also applicable. In Case 4, L1-RSRP is replaced with L1-SINR.

[0343] Option 1

[0344] The UE reports the RS index and the L1-RSRP for each RS index in the CSI report across multiple frequencies / cells. The RS index may also be the regenerated index in the second embodiment. The initial L1-RSRP in the CSI report is the maximum L1-RSRP across multiple frequencies / cells, and is quantized with 7 bits. The remaining L1-RSRPs are quantized with 4 bits as the difference from the maximum L1-RSRP. As in method 3-1, in the case of a two-step comparison, the UE may use L1-SINR in the first comparison and L1-RSRP in the second comparison, and report X RSs in order of high to low L1-RSRP. The comparison of L1-RSRP / L1-SINR may be performed for each frequency / cell or across multiple frequencies / cells. According to option 1, the best RS (beam) can be determined across multiple frequencies / cells.

[0345] Option 2

[0346] In the CSI report, the UE reports the RS index and L1-RSRP for each RS index for each frequency / cell. The first L1-RSRP in the CSI report is the maximum L1-RSRP for each frequency / cell and is quantized using 7 bits. The remaining L1-RSRPs are quantized using 4 bits as the difference from the maximum L1-RSRP for each frequency / cell. Option 2 allows the optimal RS (beam) to be determined for each frequency / cell.

[0347] In this embodiment, RS index regeneration can be performed for each frequency / cell or across multiple frequencies / cells. In this option, the number of report beams per frequency can also be set.

[0348] According to the present embodiment, values ​​other than the maximum L1-RSRP / L1-SINR are quantized with 4 bits, and thus the number of bits can be reduced.

[0349] <Fourth embodiment>

[0350] The following scenario is described in detail: the UE measures RS for both L1-RSRP and L1-SINR, selects the RS to be reported, and reports both L1-RSRP and L1-SINR of the selected RS (scenario 5 above). This embodiment can also apply the above-mentioned L1-RSRP / L1-SINR measurement / reporting (1) or (2).

[0351] [Method 4-1]

[0352] In this case, regarding the comparison of RS (beam) in this embodiment, options 1 and 2 are the same as options 1 and 2 in the third embodiment, and thus description thereof is omitted. In the present disclosure, frequency may also be rewritten as cell.

[0353] Option 3

[0354] Alternatively, the RSs may be compared based on L1-RSRP first, either per frequency or across multiple frequencies, and then based on L1-SINR. The UE may then report a specific number of RSs in descending order of L1-RSRP and further report a specific number of RSs in descending order of L1-SINR in a CSI report based on the respective comparison results.

[0355] [Method 4-2]

[0356] Option 1

[0357] It can also be combined with the example described in the extension (2) of the above CSI measurement / reporting configuration (for example, Figure 14 、 Figure 15 ) CSI reporting is performed in the same manner. However, instead of CRI or SSBRI, RS indices regenerated across multiple frequencies may be included in the CSI report. That is, the UE may also report the regenerated RS indices and the L1-RSRP and L1-SINR for each RS index. The first L1-RSRP in the CSI report is the maximum L1-RSRP, which is quantized with 7 bits. The remaining L1-RSRPs are quantized with 4 bits as the difference from the maximum L1-RSRP. In addition, an additional indication of the beam indicating the highest L1-SINR is reported, the indicated highest L1-SINR is quantized with 7 bits, and the remaining L1-SINRs are quantized with 4 bits as the difference.

[0358] The UE may also use L1-SINR in the first comparison and L1-RSRP in the second comparison, reporting X RSs in descending order of L1-RSRP. The L1-RSRP / L1-SINR comparison may be performed per frequency or across multiple frequencies.

[0359] Option 2

[0360] The UE may also report the regenerated RS index and the L1-RSRP and L1-SINR for each RS index. The initial L1-SINR in the CSI report is the maximum L1-SINR, quantized with 7 bits. The remaining L1-SINRs are quantized with 4 bits as the difference from the maximum L1-SINR. Furthermore, an additional indication indicating the beam with the highest L1-RSRP is reported, with the indicated highest L1-RSRP quantized with 7 bits and the remaining L1-RSRPs quantized with 4 bits as the difference.

[0361] The UE may also use L1-RSRP in the first comparison and L1-SINR in the second comparison, reporting X RSs in descending order of L1-SINR. The L1-RSRP / L1-SINR comparison may be performed per frequency or across multiple frequencies.

[0362] Option 3

[0363] The UE may also report the RS index and the L1-RSRP and L1-SINR of each RS index in the CSI report. In this option, the UE compares / selects / reports the L1-RSRP and L1-SINR of the RS on a per-frequency basis.

[0364] Regarding quantization in the CSI report, for example, it can also be the same as option 1.

[0365] Alternatively, the maximum / initial L1-RSRP in each frequency may be quantized with 7 bits, and the remaining L1-RSRPs may be quantized with 4 bits as differential values. In each frequency, the indication of the RS for the maximum L1-SINR may also be reported additionally for each frequency. Therefore, the indicated maximum L1-SINR is quantized with 7 bits, and the remaining L1-SINRs are quantized with 4 bits as differential values. Alternatively, the UE may additionally report the indication of the maximum L1-SINR beam in multiple frequencies. Therefore, the indicated maximum L1-SINR is quantized with 7 bits, and the remaining L1-SINRs are quantized with 4 bits as differential values.

[0366] Alternatively, for each frequency, the maximum / initial L1-SINR is quantized with 7 bits, and the remaining L1-SINRs are quantized with 4 bits as differential values. An indication of the maximum L1-RSRP beam for each frequency is additionally reported for each frequency. Thus, the indicated maximum L1-RSRP is quantized with 7 bits, and the remaining L1-RSRPs are quantized with 4 bits as differential values. Alternatively, the UE may additionally report an indication of the maximum L1-RSRP for multiple frequencies. Thus, the indicated maximum L1-RSRP is quantized with 7 bits, and the remaining L1-RSRPs are quantized with 4 bits as differential values.

[0367] The regeneration of the RS index may be performed across multiple frequencies as in Option 1. Alternatively, the regeneration of the RS index may be performed for each frequency.

[0368] Option 4

[0369] The UE may also report a list containing the regenerated RS index and the L1-RSRP of each RS, as well as another list containing the regenerated RS index and the L1-SINR of each RS. The UE may also quantize the maximum L1-RSRP / L1-SINR value with 7 bits for each frequency or each list for multiple frequencies, and quantize the remaining values ​​as differential values.

[0370] According to this embodiment, when both L1-RSRP and L1-SINR are reported, a CSI report can be appropriately generated.

[0371] <Supplement>

[0372] In CSI measurement / reporting based on UE judgment or event triggering, the reporting content and quantification when reporting L1-RSRP / L1-SINR are not clear, so they are explained in detail in the fifth / sixth embodiment.

[0373] <Fifth embodiment>

[0374] Embodiments 0 through 4 can also be applied to CSI measurement / reporting based on UE judgment or event triggering. The UE can also use any of the aforementioned events A2 through A6 and I1 as a trigger to transmit a CSI report according to Embodiments 0 through 4. Alternatively, the UE can use other methods to determine whether to perform a CSI report. In other words, even without receiving an instruction from the NW (base station), a CSI report can be transmitted based on the UE's judgment.

[0375] The UE can send periodic CSI reports on the PUCCH, semi-persistent CSI reports on the PUCCH / PUSCH, aperiodic CSI reports on the PUSCH, or CSI reports on the MAC CE.

[0376] Figure 24 This is a flowchart illustrating an example of processing according to the fifth / sixth embodiment. The UE measures the L1-RSRP / L1-SINR of RSs across one or more frequencies or cells (S1). The UE determines whether the measurement results of S1 meet specific conditions (e.g., at least one of the aforementioned events A2 to A6 and I1) (S2). If S2 determines yes, the UE transmits a CSI report including the L1-RSRP / L1-SINR (S3). If S2 determines no, the UE terminates processing according to the fifth / sixth embodiment. Figure 24 The processing may be repeatedly performed at specific intervals.

[0377] <Sixth embodiment>

[0378] Based on any one of events A2 to A6 and I1, or other triggers, the UE can send a CSI report even if it does not receive an instruction from the NW (base station). In this case, the CSI report may also include the content of any of the following options. The following conditions can be any one of events A2 to A6 and I1, or other conditions. In addition, in each option, the RS (the best RS) is selected in descending order of the L1-RSRP / L1-SINR of the RS. The candidate cell (the best candidate cell) is selected based on the measurement results in events A2 to A6 and I1. The candidate cell corresponds to the adjacent cell in events A2 to A6 and I1. This embodiment can also be based on the fifth embodiment.

[0379] [Method 6-1]

[0380] The UE may also transmit a CSI report including one or more RSs corresponding to one or more candidate cells that meet the conditions and the corresponding L1-RSRP / L1-SINR. For example, any of the following options 1 to 3 may also be applied.

[0381] Option 1

[0382] The best RS corresponding to a candidate cell that meets the conditions (with a regenerated RS index / RS ID with a cell ID / frequency ID) and the corresponding L1-RSRP / SINR.

[0383] Option 2

[0384] One or more X RSs (with cell ID / frequency ID, regenerated RS index / RS ID) corresponding to the best candidate cell that meets the conditions, and the corresponding L1-RSRP / L1-SINR.

[0385] Option 3

[0386] One or more (X) RSs (with cell ID / frequency ID, regenerated RS index / RS ID) corresponding to one or more (Y) candidate cells that meet the conditions, and the corresponding L1-RSRP / L1-SINR.

[0387] When options 1-3 are applied, the UE may not report the measurement values ​​of the serving cell. Alternatively, the UE may report only the measurement values ​​of candidate cells that meet certain conditions (e.g., those with a better offset than the serving cell or those with measurement values ​​above a threshold). Furthermore, X, Y, and the number of RSs reported per cell may be configured via higher layer signaling or physical layer signaling. The UE may also transmit X, Y, and the number of RSs reported per cell as UE capability information.

[0388] Option 4

[0389] Regarding CSI reporting, in addition to the contents of options 1, 2, and 3, the RS from the serving cell and the L1-RSRP / L1-SINR of the RS may also be reported in order for the NW to determine mobility.

[0390] [Method 6-2]

[0391] For the quantization of the L1-RSRP / L1-SINR measurement values ​​included in the CSI report, at least one of the following options 1 to 4 may be applied. The following describes an example in which a specific measurement value (absolute value) is quantized with 7 bits and the difference value from the specific measurement value is quantized with 4 bits, but the number of bits is not limited to this.

[0392] Option 1

[0393] The UE may quantize each RS measurement value with 7 bits regardless of the candidate cell / serving cell.

[0394] Option 2

[0395] The UE may quantize the RS measurement value of the candidate cell with 7 bits and quantize the RS measurement value of the current serving cell with 4 bits as a difference value.

[0396] Option 3

[0397] The UE may quantize the maximum measurement value of the RS of each candidate cell with 7 bits, and quantize the other measurement values ​​of the RS of each cell as difference values ​​with 4 bits.

[0398] Option 4

[0399] The UE may quantize the maximum measurement value of the RS of each frequency with 7 bits, and quantize the other measurement values ​​of the RS of each frequency with 4 bits as difference values.

[0400] According to the fifth / sixth embodiment, when CSI measurement / reporting is performed based on UE's judgment or event triggering, CSI reports can be appropriately generated.

[0401] Supplementary information

[0402] [Notification of information to UE]

[0403] The notification of arbitrary information (from the network (NW)) (e.g., base station (BS))) to the UE (in other words, the reception of arbitrary information from the BS in the UE) in the above-mentioned embodiment can also be performed using physical layer signaling (e.g., DCI), high-layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PDCCH, PDSCH, reference signals), or a combination thereof.

[0404] When the notification is performed through a MAC CE, the MAC CE may be identified by including a new logical channel ID (LCID) not specified in existing standards in a MAC subheader.

[0405] In the case where the above-mentioned notification is performed through DCI, the above-mentioned notification may also be performed through a specific field of the DCI, a radio network temporary identifier (Radio Network Temporary Identifier (RNTI)) used in scrambling the cyclic redundancy check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0406] Furthermore, notification of arbitrary information to the UE in the above-mentioned embodiments may be performed periodically, semi-continuously, or aperiodically.

[0407] [Notification of information from UE]

[0408] The notification of arbitrary information from the UE (to the NW) in the above-mentioned embodiment (in other words, the sending / reporting of arbitrary information from the UE to the BS) can also be carried out using physical layer signaling (e.g., UCI), high-layer signaling (e.g., RRC signaling, MACCE), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signals), or a combination thereof.

[0409] When the above notification is performed through MAC CE, the MAC CE can also be identified by including a new LCID that is not specified in the existing standard in the MAC subheader.

[0410] When the notification is performed through UCI, the notification may be sent using PUCCH or PUSCH.

[0411] Furthermore, the notification of arbitrary information from the UE in the above-mentioned embodiments may be performed periodically, semi-continuously, or aperiodically.

[0412] [Regarding the application of each embodiment]

[0413] At least one of the above-mentioned embodiments may also be applied when a specific condition is met, which may be specified in a standard or notified to the UE / BS using higher layer signaling / physical layer signaling.

[0414] At least one of the above-mentioned embodiments may also be applied only to UEs that report a specific UE capability or support the specific UE capability.

[0415] The specific UE capability may also indicate at least one of the following:

[0416] Supporting specific processing / operation / control / information for at least one of the above embodiments;

[0417] Support CSI reporting related to RSs on multiple frequencies;

[0418] Support CSI reporting related to RS of multiple cells;

[0419] Support for CSI reporting including both L1-RSRP and L1-SINR;

[0420] Support index regeneration;

[0421] Support CSI reporting of candidate cells.

[0422] In addition, the above-mentioned specific UE capabilities can be capabilities that are applied across the entire frequency (commonly regardless of the frequency), or capabilities for each frequency (for example, one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), or capabilities for each frequency range (for example, Frequency Range 1 (FR1)), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities for each feature set (Feature Set (FS)) or feature set per component carrier (Feature Set Per Component-carrier (FSPC)).

[0423] Furthermore, the specific UE capability may be a capability that applies to all duplex modes (commonly regardless of the duplex mode) or a capability that applies to each duplex mode (eg, time division duplex (TDD) or frequency division duplex (FDD)).

[0424] Furthermore, at least one of the aforementioned embodiments may also be applied when specific information associated with the aforementioned embodiment is configured / activated / triggered by the UE through higher layer signaling / physical layer signaling (or operations of the aforementioned embodiment are performed). For example, the specific information may be any RRC parameter for a specific release (e.g., Rel. 18 / 19).

[0425] The UE may also apply, for example, Rel.15 / 16 operations when it does not support at least one of the above-mentioned specific UE capabilities or is not configured with the above-mentioned specific information.

[0426] (Note)

[0427] The following inventions are added to one embodiment of the present disclosure.

[0428] [Note 1]

[0429] A terminal having:

[0430] a control unit configured to measure at least one of a Layer 1 Reference Signal Received Power (RSRP) and a Layer 1 Signal to Interference plus Noise Ratio (SINR) of a Reference Signal (RS) across one or more frequencies or one or more cells; and

[0431] The sending unit sends a channel state information (CSI) report including at least one of the L1-RSRP and the L1-SINR.

[0432] [Note 2]

[0433] The terminal as described in Supplement 1, wherein:

[0434] The terminal has a receiving unit that receives a setting of the number of RSs across all cells or the entire frequency, the number of RSs for each cell or each candidate cell, or the number of RSs for each frequency,

[0435] The sending unit sends the CSI report based on the setting.

[0436] [Note 3]

[0437] The terminal as described in Supplement 1 or Supplement 2, wherein:

[0438] The control unit generates an RS index corresponding to the candidate cell and associated with at least one of the set RS indices,

[0439] The sending unit sends a channel state information (CSI) report including the generated RS index.

[0440] [Note 4]

[0441] The terminal according to any one of Supplement 1 to Supplement 3, wherein:

[0442] The control unit measures the RS with respect to the L1-RSRP and the L1-SINR, and selects the RS to be reported,

[0443] The sending unit sends the CSI report including only the L1-RSRP or only the L1-SINR of the selected RS.

[0444] (Note)

[0445] The following inventions are further added to one embodiment of the present disclosure.

[0446] [Note 1]

[0447] A terminal having:

[0448] a control unit, configured to measure at least one of a Layer 1 Reference Signal Received Power (RSRP) and a Layer 1 Signal to Interference plus Noise Ratio (SINR) of a Reference Signal (RS) across one or more frequencies or one or more cells, and determine whether a measurement result satisfies a specific condition; and

[0449] The sending unit sends a channel state information (CSI) report including at least one of the L1-RSRP and the L1-SINR when the measurement result meets a specific condition.

[0450] [Note 2]

[0451] The terminal as described in Supplement 1, wherein:

[0452] The sending unit sends a CSI report, where the CSI report includes: one or more RSs corresponding to one or more candidate cells that meet the specific condition, and at least one of the corresponding L1-RSRP and L1-SINR.

[0453] [Note 3]

[0454] The terminal as described in Supplement 1 or Supplement 2, wherein:

[0455] The control unit quantizes the RS measurement value of the candidate cell with 7 bits, and quantizes the RS measurement value of the current serving cell with 4 bits as a difference value.

[0456] [Note 4]

[0457] The terminal according to any one of Supplement 1 to Supplement 3, wherein:

[0458] The control unit quantizes the maximum measurement value of the RS at each frequency into 7 bits, and quantizes the other measurement values ​​of the RS at each frequency into 4 bits as difference values.

[0459] (Wireless Communication System)

[0460] The following describes a configuration of a wireless communication system according to an embodiment of the present disclosure. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof.

[0461] Figure 25 This figure shows an example of a schematic configuration of a wireless communication system according to one embodiment. Wireless communication system 1 (also referred to simply as system 1) may be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP) or the fifth-generation mobile communication system New Radio (5GNR).

[0462] In addition, the wireless communication system 1 may also support dual connectivity between multiple radio access technologies (Radio Access Technologies (RATs)) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may also 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)), and the like.

[0463] 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.

[0464] The wireless communication system 1 may also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both the MN and the SN are NR base stations (gNB)).

[0465] The wireless communication system 1 may also include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are deployed within the macrocell C1 and form small cells C2 that are narrower than the macrocell C1. User terminals 20 may also be located within at least one of the cells. The arrangement and number of cells and user terminals 20 are not limited to those shown in the figure. Hereinafter, when not distinguishing between base stations 11 and 12, they are collectively referred to as base stations 10.

[0466] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0467] Each CC may also be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). Macrocell C1 may also be included in FR1, and small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above 24 GHz (above-24 GHz)). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to these. For example, FR1 may also correspond to a frequency band higher than FR2.

[0468] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0469] Multiple base stations 10 may be connected via wired (e.g., optical fiber based on the Common Public Radio Interface (CPRI), an X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11, which functions as a host station, may be referred to as an Integrated Access Backhaul (IAB) donor, and base station 12, which functions as a relay station (relay), may be referred to as an IAB node.

[0470] The base station 10 may be connected to the core network 30 via other base stations 10 or directly. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0471] The core network 30 may also include network functions (NFs), such as the User Plane Function (UPF), Access and Mobility Management Function (AMF), Session Management Function (SMF), Unified Data Management (UDM), Application Function (AF), Data Network (DN), Location Management Function (LMF), and Operation, Administration, and Maintenance (Management) (OAM). Furthermore, a single network node may provide multiple functions. Furthermore, communication with an external network (e.g., the Internet) may be performed via the DN.

[0472] The user terminal 20 may also be at least one terminal supporting communication modes such as LTE, LTE-A, and 5G.

[0473] In the wireless communication system 1 , a radio access scheme based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), or single carrier frequency division multiple access (SC-FDMA) may be used.

[0474] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1 , other radio access schemes (eg, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0475] In the wireless communication system 1 , downlink channels such as a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20 , a broadcast channel (Physical Broadcast Channel (PBCH)), and a downlink control channel (Physical Downlink Control Channel (PDCCH)) can be used.

[0476] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. can also be used as an uplink channel.

[0477] The PDSCH transmits user data, higher-layer control information, and the System Information Block (SIB). The PUSCH also transmits user data and higher-layer control information. The PBCH also transmits the Master Information Block (MIB).

[0478] The PDCCH may also transmit lower layer control information, which may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of the PDSCH and the PUSCH.

[0479] In addition, the DCI that schedules the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be rewritten as DL data, and the PUSCH may also be rewritten as UL data.

[0480] PDCCH detection also utilizes control resource sets (CORESETs) and search spaces. A CORESET corresponds to the resources used to search for DCI. A search space corresponds to the search area and search method for PDCCH candidates. A CORESET can be associated with one or more search spaces. The UE can also monitor the CORESETs associated with a search space based on the search space configuration.

[0481] A search space may also correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. Furthermore, the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," and "CORESET configuration" in this disclosure may be interchangeable.

[0482] The PUCCH can also transmit at least one uplink control information (uplink control information (UCI)) including channel state information (CSI), delivery confirmation information (e.g., Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH can also transmit the random access preamble used to establish a connection with a cell.

[0483] In the present disclosure, terms such as downlink and uplink may be expressed without the word “link.” In addition, various channels may be expressed without the word “physical” at the beginning.

[0484] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), and the like may also 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), and a phase tracking reference signal (PTRS) may also be transmitted as DL-RS.

[0485] For example, a synchronization signal may be at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SSs (PSS, SSS) and PBCHs (and DMRS for the PBCH) may also be referred to as an SS / PBCH block or an SS block (SSB). Furthermore, SSs and SSBs may also be referred to as reference signals.

[0486] In addition, wireless communication system 1 may also transmit a sounding reference signal (SRS) or a demodulation reference signal (DMRS) as an uplink reference signal (UL-RS). DMRS is also called a user terminal-specific reference signal (UE-specific Reference Signal).

[0487] (Base Station)

[0488] Figure 26 This figure shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission path interface (transmission line interface) 140. Furthermore, one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140 may be provided.

[0489] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0490] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which this disclosure relates.

[0491] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. It may also control transmission, reception, and measurement using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transceiver unit 120. The control unit 110 may also perform call processing (e.g., setup and release) of communication channels, manage the status of the base station 10, and manage radio resources.

[0492] Transmitter / receiver unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. Baseband unit 121 may also include a transmit processing unit 1211 and a receive processing unit 1212. Transmitter / receiver unit 120 may include a transmitter / receiver, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmit / receive circuits, and the like, as described based on common knowledge in the technical fields involved in this disclosure.

[0493] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0494] The transmitting and receiving antenna 130 can be formed of an antenna described based on common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0495] The transmitting and receiving unit 120 may also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the aforementioned uplink channel, uplink reference signal, etc.

[0496] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0497] The transmitting and receiving unit 120 (transmitting processing unit 1211) may also perform processing on the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (e.g., RLC retransmission control), the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), etc. on the data and control information obtained from the control unit 110, to generate a bit string to be transmitted.

[0498] The transmitting and receiving unit 120 (transmitting processing unit 1211) may also perform transmission processing such as channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion, etc. on the bit sequence to be transmitted, and output a baseband signal.

[0499] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0500] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filtering, and demodulation into baseband signals on the radio frequency band signals received via the transmitting and receiving antenna 130 .

[0501] The transmitting and receiving unit 120 (receiving processing unit 1212) may also apply receiving processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filtering processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to obtain user data, etc.

[0502] The transmitting / receiving unit 120 (measuring unit 123) may also perform measurements related to received signals. For example, the measuring unit 123 may perform radio resource management (RRM) measurements and channel state information (CSI) measurements based on the received signals. The measuring unit 123 may also 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)), and propagation path information (e.g., CSI). The measurement results may also be output to the control unit 110.

[0503] The transmission path interface 140 can also send and receive signals (return signaling) between the devices included in the core network 30 (for example, the network node providing NF), other base stations 10, etc., and can also obtain and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0504] In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 120 , the transmitting and receiving antenna 130 , and the transmission path interface 140 .

[0505] The transmitting and receiving unit 120 may also transmit settings related to measurement of at least one of the layer 1 reference signal received power (Layer 1 (L1)-Reference Signal Received Power (RSRP)) and the layer 1 signal to interference plus noise ratio (L1-Signal to Interference plus Noise Ratio (SINR)) of a reference signal (RS) across one or more frequencies or one or more cells, and receive a channel state information (CSI) report including at least one of the L1-RSRP and the L1-SINR.

[0506] The transmitting and receiving unit 120 may also send settings related to the measurement of at least one of the layer 1 reference signal received power (Layer 1 (L1)-Reference Signal Received Power (RSRP)) and the layer 1 signal to interference plus noise ratio (L1-Signal to Interference plus Noise Ratio (SINR)) of the reference signal (RS) across one or more frequencies or one or more cells, and receive a channel state information (CSI) report including at least one of the L1-RSRP and the L1-SINR when the measurement result meets specific conditions.

[0507] The control unit 110 may also control the transmission and reception processing of the transmission and reception unit 120 .

[0508] (User Terminal)

[0509] Figure 27 This figure shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Furthermore, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided in one or more units.

[0510] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0511] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which this disclosure relates.

[0512] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission, reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transmission and reception unit 220.

[0513] The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, and the like, which are described based on common knowledge in the technical fields involved in this disclosure.

[0514] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit or may be composed of a transmitting unit and a receiving unit. The transmitting unit may also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0515] The transmitting and receiving antenna 230 can be formed of an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0516] The transmitting and receiving unit 220 may also receive the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the aforementioned uplink channel, uplink reference signal, etc.

[0517] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0518] The transmitting and receiving unit 220 (transmitting processing unit 2211 ) may also perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data and control information obtained from the control unit 210 to generate a bit sequence to be transmitted.

[0519] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output a baseband signal.

[0520] Furthermore, whether or not to apply DFT processing may also be determined based on the transform precoding configuration. For a particular channel (e.g., PUSCH), if transform precoding is enabled, the transceiver unit 220 (transmit processing unit 2211) may perform DFT processing as part of the aforementioned transmission process in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transceiver unit 220 (transmit processing unit 2211) may perform DFT processing as part of the aforementioned transmission process.

[0521] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0522] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 230 .

[0523] The transmitting and receiving unit 220 (receiving processing unit 2212) may also apply receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0524] The transmitting / receiving unit 220 (measuring unit 223) may also perform measurements related to received signals. For example, the measuring unit 223 may also perform RRM measurements and CSI measurements based on the received signals. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), and other information. The measurement results may also be output to the control unit 210.

[0525] In addition, the measurement unit 223 may also derive channel measurements for CSI calculation based on channel measurement resources. Channel measurement resources may also be, for example, non-zero power (NZP) CSI-RS resources. In addition, the measurement unit 223 may also derive interference measurements for CSI calculation based on interference measurement resources. Interference measurement resources may also be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc. In addition, CSI-IM may also be referred to as CSI-Interference Management (IM) and may be interchangeable with Zero Power (ZP) CSI-RS.

[0526] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0527] The control unit 210 may also measure at least one of Layer 1 Reference Signal Received Power (RSRP) and Layer 1 Signal to Interference plus Noise Ratio (SINR) of a reference signal (RS) across one or more frequencies or one or more cells.

[0528] The transmitting and receiving unit 220 may also transmit a channel state information (CSI) report including at least one of the L1-RSRP and the L1-SINR.

[0529] The transmitting and receiving unit 220 may also receive a setting of the number of RSs across all cells or the entire frequency, the number of RSs for each cell or each candidate cell, or the number of RSs for each frequency, and send the CSI report based on the setting.

[0530] The control unit 210 may also generate an RS index corresponding to the candidate cell and associated with at least one of the configured RS indices. The transmitting and receiving unit 220 may also transmit a channel state information (CSI) report including the generated RS index.

[0531] The control unit 210 may also measure the RS for the L1-RSRP and the L1-SINR and select the RS to be reported. The transmitting and receiving unit 220 may also transmit the CSI report including only the L1-RSRP or only the L1-SINR of the selected RS.

[0532] The control unit 210 may also measure at least one of the layer 1 reference signal received power (Layer 1 (L1)-Reference Signal Received Power (RSRP)) and the layer 1 signal to interference plus noise ratio (L1-Signal to Interference plus Noise Ratio (SINR)) of the reference signal (RS) across more than one frequency or more than one cell, and determine whether the measurement result meets specific conditions.

[0533] The transmitting and receiving unit 220 may also transmit a channel state information (CSI) report including at least one of the L1-RSRP and the L1-SINR when the measurement result satisfies a specific condition.

[0534] The transmitting and receiving unit 220 may also transmit a CSI report including: one or more RSs corresponding to one or more candidate cells satisfying the specific condition, and at least one of the corresponding L1-RSRP and L1-SINR.

[0535] The control unit 210 may also quantize the RS measurement value of the candidate cell into 7 bits and quantize the RS measurement value of the current serving cell into 4 bits as a difference value.

[0536] The control unit 210 may quantize the maximum measurement value of the RS at each frequency into 7 bits, and quantize the other measurement values ​​of the RS at each frequency into 4 bits as difference values.

[0537] (Hardware structure)

[0538] Furthermore, the block diagrams used in the description of the above embodiments illustrate blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. Furthermore, the implementation method of each functional block is not particularly limited. Specifically, each functional block can be implemented using a single device that is physically or logically combined, or by connecting two or more physically or logically separate devices directly or indirectly (e.g., by wired or wireless connections) to implement these multiple devices. A functional block can also be implemented by combining one or more of these devices with software.

[0539] Here, the term "function" includes, but is not limited to, judging, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. For example, a functional block (structural unit) that implements a transmitting function may also be referred to as a transmitting unit, a transmitter, or the like. Any of these terms are as described above, and their implementation methods are not particularly limited.

[0540] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 28This figure shows an example of the hardware configuration of a base station and a user terminal according to one embodiment. The base station 10 and user terminal 20 described above can also 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, and a bus 1007.

[0541] In this disclosure, the terms "device," "circuit," "equipment," "section," and "unit" are interchangeable. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figures, or may exclude some of the devices.

[0542] For example, although only one processor 1001 is shown, multiple processors may be provided. Furthermore, processing may be performed by a single processor, or by two or more processors simultaneously, sequentially, or using other methods. Furthermore, processor 1001 may be implemented using more than one chip.

[0543] The functions of the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or by controlling at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0544] Processor 1001 controls the entire computer by, for example, operating an operating system. Processor 1001 may also be comprised of a central processing unit (CPU) including interfaces with peripheral devices, a control device, a computing device, registers, and the like. For example, at least a portion of the aforementioned control unit 110 (210) and transceiver unit 120 (220) may also be implemented by processor 1001.

[0545] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes based on these programs. As a program, a program that causes a computer to execute at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and executed by the processor 1001, and the other functional blocks can also be implemented similarly.

[0546] Memory 1002 may also be a computer-readable recording medium, such as at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or other suitable storage medium. Memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), or the like. Memory 1002 can store executable programs (program code), software modules, and the like for implementing the wireless communication method according to an embodiment of the present disclosure.

[0547] Storage 1003 may also be a computer-readable recording medium, such as at least one of a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM))), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, stick, or key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0548] The communication device 1004 is hardware (a transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network. For example, it is also referred to as a network device, a network controller, a network card, a communication module, etc. In order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the aforementioned transmitting and receiving unit 120 (220) and the transmitting and receiving antenna 130 (230) may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be implemented by a transmitting unit 120a (220a) and a receiving unit 120b (220b) that are physically or logically separated.

[0549] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, light-emitting diode (LED) lamp, etc.). Alternatively, the input device 1005 and output device 1006 may be integrated (e.g., a touch panel).

[0550] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0551] Furthermore, the base station 10 and user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and may use this hardware to implement part or all of each functional block. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0552] (Variation)

[0553] In addition, the terms described in this disclosure and the terms required for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be replaced with each other. In addition, a signal may also be a message. Reference Signal (RS) may also be referred to as RS, and may also be referred to as Pilot, Pilot Signal, etc. depending on the applied standard. In addition, Component Carrier (CC) may also be referred to as Cell, Frequency Carrier, Carrier Frequency, etc.

[0554] A radio frame can also be composed of one or more time periods (frames) in the time domain. Each of these one or more time periods (frames) that make up a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (for example, 1ms) that is independent of the numerology.

[0555] Here, a parameter set may also refer to communication parameters applied to at least one of the transmission and reception of a signal or channel. For example, the parameter set may also represent at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0556] In the time domain, a slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) Furthermore, a slot can also be a time unit based on a parameter set.

[0557] A time slot may also contain multiple mini-slots. Each mini-slot may also consist of one or more symbols in the time domain. Furthermore, a mini-slot may also be referred to as a sub-slot. A mini-slot may also consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-slots may also be referred to as PDSCH (PUSCH) mapping type B.

[0558] Radio frames, subframes, time slots, mini-slots, and symbols all represent time units used for signal transmission. Radio frames, subframes, time slots, mini-slots, and symbols may also be referred to by their respective equivalents. Furthermore, the time units of frame, subframe, time slot, mini-slot, and symbol in this disclosure may be interchangeable.

[0559] For example, a subframe can be called a TTI, multiple consecutive subframes can be called a TTI, and a slot or a mini-slot can be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Furthermore, the unit representing a TTI can be called a slot, a mini-slot, or the like, rather than a subframe.

[0560] Here, TTI refers to, for example, the minimum time unit used for scheduling in wireless communications. For example, in the LTE system, a base station schedules each user terminal by allocating radio resources (such as the frequency bandwidth and transmit power available to each user terminal) in TTI units. The definition of TTI is not limited to this.

[0561] A TTI can also be a unit of time for transmitting channel-coded data packets (transport blocks), code blocks, code words, etc., and can also be a unit of processing for scheduling, link adaptation, etc. Furthermore, when a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0562] Furthermore, while a time slot or mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-slots) can also be the minimum time unit for scheduling. Furthermore, the number of time slots (mini-slots) that constitute this minimum time unit for scheduling can also be controlled.

[0563] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini-slot, a subslot, a time slot, etc.

[0564] In addition, a long TTI (e.g., normal TTI, subframe, etc.) can also be rewritten as a TTI with a time length exceeding 1ms, and a short TTI (e.g., shortened TTI, etc.) can also be rewritten as a TTI with a TTI length shorter than the long TTI and longer than 1ms.

[0565] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it may also include one or more consecutive subcarriers (subcarriers). The number of subcarriers contained in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in an RB can also be determined based on the parameter set.

[0566] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks.

[0567] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0568] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0569] A Bandwidth Part (BWP) (also known as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a particular parameter set within a carrier. Common RBs can also be identified by their index relative to the common reference point for that carrier. PRBs can also be defined within a BWP and numbered within that BWP.

[0570] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured within one carrier.

[0571] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive specific signals / channels outside the activated BWP.

[0572] The above-mentioned structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots within a slot, the number of symbols and RBs within a slot or mini-slot, the number of subcarriers within an RB, the number of symbols within a TTI, the symbol length, and the cyclic prefix (CP) length can be varied in various ways.

[0573] Furthermore, the information and parameters described in this disclosure may be expressed as absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may be indicated by specific indexes.

[0574] The names used for parameters, etc. in this disclosure are not intended to be limiting in any respect. Furthermore, the mathematical formulas used for these parameters may differ from those explicitly disclosed in this disclosure. Various channels (such as PUCCH and PDCCH) and information elements can be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any respect.

[0575] Information, signals, and the like described in this disclosure may also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referred to throughout the foregoing description may also be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

[0576] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0577] Input and output information, signals, etc. can be stored in a specific location (e.g., memory) or managed using a management table. Input and output information, signals, etc. can be overwritten, updated, or appended. Output information, signals, etc. can also be deleted. Input information, signals, etc. can also be sent to other devices.

[0578] The notification of information is not limited to the methods / implementations described in this disclosure and may also be performed using other methods. For example, the notification of information in this disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0579] In addition, physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), Layer 1 control information (L1 control signal), etc. Furthermore, RRC signaling may also be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, MAC signaling may also be notified using, for example, a MAC Control Element (CE).

[0580] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0581] The determination can be made using a value represented by a bit (0 or 1), a true or false value represented by true (true) or false (false) (Boolean value), or by comparing numerical values ​​(for example, comparing with a specific value).

[0582] The term “software” or “firmware” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0583] Furthermore, software, instructions, information, and the like may also be transmitted and received via a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and a wireless technology (infrared, microwave, etc.), at least one of the wired technology and the wireless technology is included within the definition of a transmission medium.

[0584] The terms "system" and "network" used in this disclosure are interchangeable. "Network" may also refer to devices included in the network (eg, base stations).

[0585] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL))", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmit power", "phase rotation", "antenna port", "layer", "number of layers", "rank", "resource", "resource set", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel", "UE panel", "transmitting entity", and "receiving entity" can be used interchangeably.

[0586] Furthermore, in the present disclosure, antenna ports can be interchanged with antenna ports used for any signal / channel (e.g., Demodulation Reference Signal (DMRS) ports). In the present disclosure, resources can be interchanged with resources used for any signal / channel (e.g., reference signal resources, SRS resources, etc.). Furthermore, resources can include time / frequency / symbol / space / power resources. Furthermore, a spatial domain transmit filter can include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0587] The above-mentioned group may also include, for example, at least one of a spatial relationship group, a code division multiplexing (CDM) group, a reference signal (RS) group, a control resource set (CORESET) group, a PUCCH group, an antenna port group (for example, a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, etc.

[0588] In addition, in the present disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. can also be rewritten.

[0589] In addition, in the present disclosure, TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state (unified TCI state), common TCI state (common TCI state), joint TCI state, etc. can also be rewritten with each other.

[0590] In addition, in the present disclosure, "QCL", "QCL concept", "QCL relationship", "QCL type information", "QCL characteristics (QCLproperty / properties)", "specific QCL type (e.g., type A, type D) characteristics", "specific QCL type (e.g., type A, type D)", etc. can also be rewritten with each other.

[0591] In the present disclosure, index, identifier (ID), indicator, indication, resource ID, etc. may also be overwritten with each other. In the present disclosure, sequence, list, set, group, group, cluster, subset, etc. may also be overwritten with each other.

[0592] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and spatial relationship information (TCI state) can also be overwritten. "Spatial relationship information (TCI state)" can also be overwritten with "a collection of spatial relationship information (TCI state)," "one or more spatial relationship information," and so on. TCI states and TCIs can also be overwritten. Spatial relationship information and spatial relationships can also be overwritten.

[0593] In this disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP))", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" are used interchangeably. In some cases, a base station may be referred to as a macrocell, small cell, femtocell, or picocell.

[0594] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the base station's overall coverage area can be divided into multiple smaller areas, each of which can be provided with communications services by a base station subsystem (for example, a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or the entire coverage area of ​​at least one of a base station and a base station subsystem providing communications services within that coverage area.

[0595] In the present disclosure, the matter of a base station sending information to a terminal may be replaced with the matter of the base station instructing the terminal to control / operate based on the information.

[0596] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (UE)”, and “terminal” can be used interchangeably.

[0597] The mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client, or some other appropriate terminology.

[0598] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a moving object, a moving object body, etc.

[0599] The mobile object refers to a movable object, and the moving speed can be arbitrary, including situations where the mobile object is stopped. Examples of the mobile object include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, carts, rickshaws, ships (ships and other watercraft), airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, hot air balloons, and objects carried by them. Furthermore, the mobile object may also be a mobile object that moves autonomously based on operating instructions.

[0600] The mobile object may be a vehicle (e.g., a car, an aircraft, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station may include a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0601] Figure 29 This figure shows an example of a vehicle according to one embodiment. Vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0602] The drive unit 41 is composed of, for example, at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is configured to include at least a steering wheel (also referred to as a handle), and steers at least one of the front wheels 46 and the rear wheels 47 based on the user's operation of the steering wheel.

[0603] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and communication ports (e.g., input / output (IO) ports) 63. Signals from various sensors 50-58 included in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be referred to as an electronic control unit (ECU).

[0604] As signals from various sensors 50-58, there are the following signals, etc.: a current signal from the current sensor 50 that senses the current of the motor, a speed signal of the front wheel 46 / rear wheel 47 obtained by the speed sensor 51, an air pressure signal of the front wheel 46 / rear wheel 47 obtained by the air pressure sensor 52, a vehicle speed signal obtained by the vehicle speed sensor 53, an acceleration signal obtained by the acceleration sensor 54, a stepping amount signal of the accelerator pedal 43 obtained by the accelerator pedal sensor 55, a stepping amount signal of the brake pedal 44 obtained by the brake pedal sensor 56, an operation signal of the shift lever 45 obtained by the shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 58.

[0605] Information service unit 59 is composed of various devices that provide (output) various types of information, including driving information, traffic information, and entertainment information, such as a navigation system, audio system, speakers, displays, televisions, and radios, and one or more ECUs that control these devices. Information service unit 59 uses information acquired from external devices via communication module 60 and other means to provide various information and services (e.g., multimedia information and multimedia services) to the occupants of vehicle 40.

[0606] The information service unit 59 may include input devices for accepting input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.), and may also include output devices for implementing output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[0607] The driving assistance system unit 64 is composed of various devices for providing functions for preventing accidents or reducing the driver's driving burden, such as millimeter-wave radar, light detection and ranging (LiDAR), cameras, positioning sensors (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyroscope systems (e.g., inertial measurement units (IMUs)), inertial navigation systems (INSs), etc.), artificial intelligence (AI) chips, and AI processors, and one or more ECUs that control these devices. Furthermore, the driving assistance system unit 64 transmits and receives various information via the communication module 60 to implement driving assistance functions or autonomous driving functions.

[0608] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 with the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, microprocessor 61 and memory (ROM, RAM) 62 within the electronic control unit 49, and various sensors 50-58 included in the vehicle 40.

[0609] The communication module 60 is controlled by the microprocessor 61 of the electronic control unit 49 and is a communication device capable of communicating with external devices. For example, various information can be transmitted and received with the external device via wireless communication. The communication module 60 can be located either inside or outside the electronic control unit 49. Examples of external devices include the aforementioned base station 10 and user terminal 20. Furthermore, the communication module 60 can also be, for example, at least one of the aforementioned base station 10 and user terminal 20 (and can function as at least one of the base station 10 and user terminal 20).

[0610] The communication module 60 may also transmit at least one of the signals input to the electronic control unit 49 from the various sensors 50-58, information obtained based on these signals, and information based on external (user) input received via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, and the like may also be referred to as input units that receive input. For example, the PUSCH transmitted by the communication module 60 may also include information based on these inputs.

[0611] The communication module 60 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from external devices and displays it on the vehicle's information service unit 59. The information service unit 59 can also be referred to as an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0612] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 can also control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like included in the vehicle 40.

[0613] Furthermore, the base station in this disclosure can also be rewritten as a user terminal. For example, the various methods / implementations of this disclosure can also be applied to a structure in which communication between a base station and a user terminal is replaced by communication between multiple user terminals (e.g., device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, the user terminal 20 can also have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" can also be rewritten with terms corresponding to inter-terminal communication (e.g., "sidelink"). For example, uplink channels, downlink channels, etc. can also be rewritten as sidelink channels.

[0614] Likewise, the user terminal in the present disclosure may be rewritten as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0615] In this disclosure, actions are described as being performed by a base station, and sometimes, depending on circumstances, by its upper node. In a network comprising one or more network nodes including a base station, various operations for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (for example, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0616] The various methods / implementations described in this disclosure may be used individually or in combination, and may be switched between them during execution. Furthermore, the processing procedures, timings, flow charts, and the like of the various methods / implementations described in this disclosure may be reversed as long as they do not conflict. For example, the methods described in this disclosure use an illustrative order to present elements of various steps, but are not limited to the specific order presented.

[0617] The various modes and embodiments described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future Generation Radio Access (FX), Global System for Mobile Communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems utilizing other appropriate wireless communication methods, and next-generation systems based on these that are extended, modified, generated, or specified. Furthermore, multiple systems may be combined for application (for example, LTE or LTE-A combined with 5G).

[0618] The phrase “based on” used in this disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on.”

[0619] Any reference to an element using the designations "first," "second," etc., as used in this disclosure, does not necessarily define the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to a first and a second element does not imply that only two elements may be used or that the first element must in some way take precedence over the second element.

[0620] The term "determining" as used in this disclosure may encompass a variety of operations. For example, "determining" may also include judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching a table, database, or other data structure), ascertaining, and the like as performing a "determination."

[0621] In addition, “judgment (decision)” may also refer to situations where receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc. are regarded as “judgment (decision)”.

[0622] In other words, "judgment (decision)" can also refer to situations where certain actions are considered to be "judgments (decisions)." Furthermore, "judgment (decision)" can be rewritten as "assuming," "expecting," "considering," and so on. In this disclosure, "judgment (decision)" and the aforementioned operations can be rewritten interchangeably.

[0623] In this disclosure, "determine / determining" can be interchanged with "assume / assuming," "expect / expecting," "consider / considering," and the like. Furthermore, in this disclosure, "not assuming that..." can be interchanged with "assuming that..."

[0624] In the present disclosure, "expect" and "be expected" can be interchanged. For example, "expect(s) ..." ("..." can also be expressed, for example, using the that clause, the to-infinitive, etc.) can be interchanged with "be expected ...". "Does not expect..." can also be interchanged with "Does not expect ...". Furthermore, "An apparatus A is not expected ..." can be interchanged with "An apparatus B other than apparatus A does not expect ..." (for example, when apparatus A is a UE, apparatus B can also be a base station).

[0625] The “maximum transmit power” described in this disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated maximum transmit power).

[0626] As used in this disclosure, the terms "connected," "coupled," and all variations thereof refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between the two elements being "connected" or "coupled." The coupling or connection between elements can be physical, logical, or a combination thereof. For example, "connected" can also be rephrased as "accessed."

[0627] In the present disclosure, when two elements are connected, it is possible to consider them to be "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., and as several non-limiting and non-inclusive examples, they are "connected" or "combined" to each other using electromagnetic energy having a wavelength in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc.

[0628] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other." Alternatively, the term may also mean "A and B are each different from C." Terms such as "separate" and "bound" may also be interpreted in the same manner as "different."

[0629] When used in this disclosure, "include," "including," and variations thereof have the same inclusive meaning as the term "comprising." Furthermore, the term "or" used in this disclosure does not mean an exclusive OR.

[0630] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure may also include a case where the noun following the article is in a plural form.

[0631] In the present disclosure, “below,” “less than,” “above,” “more,” “equal to,” and the like may be replaced with each other. Furthermore, in the present disclosure, words meaning “good,” “bad,” “big,” “small,” “high,” “low,” “early,” “slow,” “wide,” “narrow,” and the like are not limited to the positive, comparative, and superlative forms, but may be replaced with each other. Furthermore, in the present disclosure, words meaning “good,” “bad,” “big,” “small,” “high,” “low,” “early,” “slow,” “wide,” “narrow,” and the like are not limited to the positive, comparative, and superlative forms, but may be replaced with each other as expressions appended with “the ith” (i is an arbitrary integer) (for example, “the highest” may be replaced with “the ith highest”).

[0632] In the present disclosure, “of,” “for,” “regarding,” “related to,” “associated with,” etc. may also be replaced with each other.

[0633] In this disclosure, expressions such as "when A, B," "if A, (then) B," "B upon A," "B in response to A," "B based on A," "B during / while A," "B before A," "B at (the same time as) / on A," "B after A," "B since A," and "B until A" can be interchanged. Furthermore, A, B, and the like here can be replaced with nouns, gerunds, or ordinary sentences, depending on the context. Furthermore, the time difference between A and B can be approximately zero (immediately after or immediately before). Furthermore, a time offset can be applied to the time when A occurs. For example, "A" can be interchanged with "before / after the time offset when A occurs." This time offset (eg, one or more symbols / time slots) may be predetermined or determined by the UE based on notified information.

[0634] In the present disclosure, timing, moment, time, time instance, arbitrary time unit (eg, time slot, sub-time slot, symbol, sub-frame), period, occasion, resource, etc. may also be interchangeable.

[0635] While the inventions disclosed herein have been described in detail above, it will be apparent to those skilled in the art that the inventions disclosed herein are not limited to the embodiments described herein. The disclosure herein is provided for illustrative purposes only and is not intended to limit the inventions disclosed herein.

Claims

1. A terminal comprising: a control unit, measuring at least one of a layer 1 reference signal received power L1-RSRP and a layer 1 signal to interference plus noise ratio L1-SINR of a reference signal RS across one or more frequencies or one or more cells, and determining whether the measurement result meets a specific condition; and The sending unit sends a channel state information CSI report including at least one of the L1-RSRP and the L1-SINR when the measurement result meets a specific condition.

2. The terminal according to claim 1, wherein: The sending unit sends a CSI report, where the CSI report includes one or more RSs corresponding to one or more candidate cells that meet the specific condition, and at least one of the corresponding L1-RSRP and L1-SINR.

3. The terminal according to claim 1, wherein: The control unit quantizes the RS measurement value of the candidate cell with 7 bits, and quantizes the RS measurement value of the current serving cell with 4 bits as a difference value. The terminal according to claim 1 , wherein: The control unit quantizes the maximum measurement value of the RS at each frequency into 7 bits, and quantizes the other measurement values ​​of the RS at each frequency into 4 bits as difference values.

5. A wireless communication method, which is a wireless communication method of a terminal, comprising: a step of measuring at least one of a layer 1 reference signal received power L1-RSRP and a layer 1 signal to interference plus noise ratio L1-SINR of a reference signal RS across one or more frequencies or one or more cells, and determining whether the measurement result satisfies a specific condition; and The step of sending a channel state information (CSI) report including at least one of the L1-RSRP and the L1-SINR when the measurement result satisfies a specific condition.

6. A base station comprising: a transmitting unit configured to transmit a setting related to measurement of at least one of a layer 1 reference signal received power L1-RSRP and a layer 1 signal to interference plus noise ratio L1-SINR of a reference signal RS across one or more frequencies or one or more cells; and The receiving unit receives a channel state information (CSI) report including at least one of the L1-RSRP and the L1-SINR when the measurement result satisfies a specific condition.

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