Terminals, wireless communication methods, base stations and systems

Abstract

A terminal according to one embodiment of the present disclosure comprises: a control unit that generates a channel state information (CSI) report including at least one field indicating a measurement result of a reference signal related to a serving cell; and a transmission unit that transmits the CSI report. This embodiment of the present disclosure makes it possible to appropriately perform CSI reporting relating to a plurality of cells.

Description

Terminal, wireless communication method and base station

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

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

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

[0004] 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

[0005] For future wireless communication systems, a technique is being considered for switching the serving cell to a cell (additional cell / candidate cell) different from the serving cell (L1 / L2 inter-cell mobility) by notifying a terminal (user terminal, User Equipment (UE)) of at least one of layer 1 and layer 2 signaling.

[0006] Also, for L1 / L2 inter-cell mobility, it is being considered that the UE reports a Channel State Information (CSI) report (which may also be called a beam report).

[0007] However, if the content of the CSI report received from the UE includes only measurement results related to beams of only the serving cell or only the candidate cell, the network cannot obtain measurement results of the switch candidate or switch source, making it difficult to make a cell switch decision. In this way, if an appropriate CSI report is not reported, problems such as suppressing improvement in communication throughput and deteriorating communication quality may occur.

[0008] Therefore, one of the objects of the present disclosure is to provide a terminal, a radio communication method, and a base station that can appropriately report CSI regarding multiple cells.

[0009] A terminal according to one aspect of the present disclosure includes a control unit that generates a Channel State Information (CSI) report including at least one field indicating a measurement result of a reference signal related to a serving cell, and a transmission unit that transmits the CSI report.

[0010] According to one aspect of the present disclosure, CSI measurement or reporting can be appropriately performed in multiple frequencies / cells.

[0011] Figure 1A shows an example of UE mobility in Rel. 17. Figure 1B shows an example of UE mobility in Rel. 18. Figure 2 shows an example of serving cell and candidate cell association. Figure 3A shows a first example of Option 2. Figure 3B shows a second example of Option 2. Figure 4 shows a serving cell switch example 1. Figure 5 shows a serving cell switch example 2. Figure 6 shows a serving cell switch example 3. Figure 7 shows an overview of RRC CSI reporting configuration. Figure 8 shows a portion of the CSI resource configuration in Rel. 17. Figure 9 shows a portion of the CSI-SSB resource set in Rel. 17. Figure 10 shows a configuration related to L3 measurement / reporting in Rel. 17. Figure 11 shows an example of RSRP values ​​for multiple frequencies. Figure 12 shows an example of the CSI-SSB-ResourceSet for Option 1 of the L1 measurement / reporting configuration extension. FIG. 13 is a diagram illustrating an example of a CSI-SSB-ResourceSet in option 2 of the L1 measurement / reporting configuration extension. FIG. 14 is a diagram illustrating an example of a CSI report in multiple frequencies. FIG. 15 is a diagram illustrating an example of a CSI measurement / reporting method in multiple frequencies. FIG. 16 is a diagram illustrating an example of the content of a CSI report according to the third embodiment. FIG. 17 is a diagram illustrating an example of the content of a CSI report according to the third embodiment. FIG. 18 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 19 is a diagram illustrating an example of the configuration of a base station according to an embodiment. FIG. 20 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. FIG. 21 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. FIG. 22 is a diagram illustrating an example of a vehicle according to an embodiment.

[0012] (CSI Reporting) In NR, a UE measures the channel state using a specific reference signal (or a resource for that reference signal) and feeds back (reports) channel state information (CSI) to the base station.

[0013] The UE may measure the channel state using a Channel State Information-Reference Signal (CSI-RS), a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, a Synchronization Signal (SS), a Demodulation Reference Signal (DMRS), etc.

[0014] The CSI-RS resource may include at least one of a non-zero power (NZP) CSI-RS and a CSI-Interference Management (IM). An SS / PBCH block is a block including a synchronization signal (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)) and a PBCH (and corresponding DMRS), and may be referred to as an SS block (SSB). An SSB index may be assigned to the time position of the SSB within a half-frame.

[0015] The CSI may include at least one of a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a CSI-RS Resource Indicator (CRI), a SS / PBCH Block Resource Indicator (SS / PBCH Block Indicator (SSBRI), a Layer Indicator (LI), a Rank Indicator (RI), a Layer 1 (L1)-Reference Signal Received Power (RSRP), a L1-Reference Signal Received Quality (RSRQ), a L1-Signal to Interference plus Noise Ratio (SINR), a L1-Signal to Noise Ratio (SNR), and the like.

[0016] The CSI may have multiple parts. A first part of the CSI (CSI Part 1) may include information with a relatively small number of bits (e.g., RI). A second part of the CSI (CSI Part 2) may include information with a relatively large number of bits (e.g., CQI), such as information determined based on CSI Part 1.

[0017] As CSI feedback methods, (1) periodic CSI (P-CSI) reporting, (2) aperiodic CSI (A(AP)-CSI) reporting, and (3) semi-persistent (semi-persistent, semi-persistent) CSI reporting (Semi-Persistent CSI: SP-CSI) reporting are being considered.

[0018] The UE may be notified of information related to CSI reporting (which may be 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 be configured, for example, using the RRC information element "CSI-ReportConfig."

[0019] The CSI reporting configuration information may include, for example, information regarding a reporting period, an offset, etc., which may be expressed in a predetermined time unit (slot unit, subframe unit, symbol unit, etc.). The CSI reporting configuration information may include a configuration ID (CSI-ReportConfigId). The configuration ID may identify parameters such as the type of CSI reporting method (whether it is SP-CSI, etc.), the reporting period, etc. The CSI reporting configuration information may include information (CSI-ResourceConfigId) indicating which signal (or which signal resource) is used to report the measured CSI.

[0020] (TCI, spatial relationship, QCL) In NR, it is considered to control the 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 encoding) in a UE of at least one of a signal and a channel (referred to as a signal / channel) based on a transmission configuration indication state (TCI state).

[0021] The TCI state may represent that which is applied to a downlink signal / channel, and the equivalent of the TCI state that is applied to an uplink signal / channel may be expressed as a spatial relation.

[0022] The TCI state is information about the Quasi-Co-Location (QCL) of signals / channels, and may also be called spatial reception parameters, spatial relation information, etc. The TCI state may be configured in the UE for each channel or signal.

[0023] The QCL is an index indicating the statistical properties of signals / channels. For example, if a signal / channel has a QCL relationship with another signal / channel, it may mean that it can be assumed that at least one of a Doppler shift, a Doppler spread, an average delay, a delay spread, and a spatial parameter (e.g., a spatial Rx parameter) is the same between these different signals / channels (i.e., the signals / channels have a QCL with respect to at least one of these).

[0024] The spatial reception parameters may correspond to a reception beam (e.g., a reception analog beam) of the UE, and the beam may be identified based on a spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure may be replaced with sQCL (spatial QCL).

[0025] A plurality of types (QCL types) of QCL may be defined. For example, four QCL types A to D may be provided, each having different parameters (or parameter sets) that can be assumed to be the same. The parameters (which may be referred to as QCL parameters) are as follows: QCL type A (QCL-A): Doppler shift, Doppler spread, mean delay, and delay spread QCL type B (QCL-B): Doppler shift and Doppler spread QCL type C (QCL-C): Doppler shift and mean delay QCL type D (QCL-D): Spatial reception parameters.

[0026] The UE's assumption that a Control Resource Set (CORESET), channel, or reference signal has a specific QCL (e.g., QCL type D) relationship with another CORESET, channel, or reference signal may be referred to as a QCL assumption.

[0027] The UE may determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) for a signal / channel based on the TCI condition or QCL assumption of the signal / channel.

[0028] The TCI state may be, for example, information about the QCL between the channel of interest (in other words, the Reference Signal (RS) for that channel) and another signal (e.g., another RS). The TCI state may be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

[0029] The channel / signal to which the TCI state is applied may be called a target channel / reference signal (target channel / RS), or simply a target, and the other signal may be called a reference reference signal (reference RS), a source RS, or simply a reference.

[0030] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), a physical uplink shared channel (PUSCH), and a physical uplink control channel (PUCCH).

[0031] Furthermore, the RS that has a QCL relationship with the channel may be at least one of, for example, a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a sounding reference signal (SRS), a tracking CSI-RS (also called a tracking reference signal (TRS)), a QCL detection reference signal (also called a QRS), a demodulation reference signal (DMRS), etc.

[0032] An SSB is a signal block including at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). An SSB may also be referred to as an SS / PBCH block.

[0033] An RS of QCL type X in a TCI state may refer to an RS that has a QCL type X relationship with a certain channel / signal (DMRS), and this RS may be called a QCL source of QCL type X in the TCI state.

[0034] (L1 / L2 Inter-Cell Mobility) The following scenario 1 or scenario 2 may be considered as a procedure in which a UE performs UL transmission to one or more cells / transmission / reception points (TRPs). In the present disclosure, a serving cell may be interpreted as a TRP in the serving cell. Layer 1 / layer 2 (L1 / L2) and DCI / Medium Access Control Control Element (MAC CE) may be interpreted as mutually interchangeable. In the present disclosure, a physical cell identity (PCI) different from the physical cell identity (PCI) of the current serving cell may be simply referred to as a "different PCI." A non-serving cell, a cell having a different PCI, and an additional cell may be interpreted as mutually interchangeable.

[0035] <Scenario 1> Scenario 1 may support intra-cell mobility of Multi-TRP (MTRP), but may not support inter-cell mobility of Multi-TRP.

[0036] (1) The UE receives from the serving cell the configuration necessary for using radio resources for data transmission and reception, including the SSB configuration for beam measurement of the TRP corresponding to a PCI different from that of the serving cell and the resources of the different PCI. (2) The UE performs beam measurement of the TRP corresponding to the different PCI and reports the beam measurement results to the serving cell. (3) Based on the above report, the Transmission Configuration Indication (TCI) state associated with the TRP corresponding to the different PCI is activated by L1 / L2 signaling from the serving cell. (4) The UE transmits and receives using UE-dedicated channels on the TRP corresponding to the different PCI. (5) The UE must always cover the serving cell, including in the case of multiple TRPs. As in conventional systems, the UE must use common channels from the serving cell, such as the Broadcast Control Channel (BCCH) and the Paging Channel (PCH).

[0037] In Scenario 1, when the UE transmits and receives signals to and from an additional cell / TRP (a TRP corresponding to the PCI of the additional cell), the serving cell (the serving cell assumption in the UE) is not changed. The UE is configured with higher layer parameters related to the PCI of non-serving cells from the serving cell. Scenario 1 may be applied, for example, in Rel. 17.

[0038] Figure 1A shows an example of UE movement in Rel. 17. Assume that a UE moves from a cell with PCI #1 (serving cell) to a cell with PCI #3 (additional cell) (which overlaps with the serving cell). In this case, in Rel. 17, the serving cell is not switched via L1 / L2. The additional cell is a cell with an additional PCI that is different from the PCI of the serving cell. The UE can receive / transmit UE-dedicated channels from the additional cell. The UE must be within the coverage of the serving cell to receive UE common channels (e.g., system information / paging / short messages).

[0039] <Scenario 2> In scenario 2, L1 / L2 inter-cell mobility is applied. With L1 / L2 inter-cell mobility, the serving cell can be changed using functions such as beam control without RRC reconfiguration. In other words, transmission and reception with an additional cell is possible without handover. Since handover requires RRC reconnection, which results in a period when data communication is unavailable, by applying L1 / L2 inter-cell mobility that does not require handover, data communication can be continued even when the serving cell is changed. Scenario 2 may be applied, for example, in Rel. 18. In scenario 2, for example, the following procedure is performed.

[0040] (1) The UE receives SSB configuration for a cell with a different PCI (additional cell) from the serving cell for beam measurement / serving cell change. (2) The UE performs beam measurement for the cell using the different PCI and reports the measurement results to the serving cell. (3) The UE may receive the configuration for the cell with a different PCI (serving cell configuration) via higher layer signaling (e.g., RRC). That is, pre-configuration for the serving cell change may be performed. This configuration may be performed together with or separately from the configuration in (1). (4) Based on the above report, the TCI state of the cell with a different PCI may be activated via L1 / L2 signaling in accordance with the serving cell change. The activation of the TCI state and the serving cell change may be performed separately. (5) The UE changes the serving cell (assumed serving cell) and starts reception / transmission using the pre-configured UE-dedicated channel and TCI state.

[0041] That is, in Scenario 2, the serving cell (the serving cell assumed by the UE) is updated by L1 / L2 signaling. Scenario 2 may be applied in Rel. 18.

[0042] Figure 1B shows an example of UE mobility in Rel. 18. In Rel. 18, the serving cell may be switched via L1 / L2. The UE can receive / transmit UE-dedicated channels / common channels to / from the new serving cell. The UE may move out of the coverage of the previous serving cell.

[0043] (Setting of Multiple Candidate Cells) FIG. 2 is a diagram showing an example of association between a serving cell and a candidate cell. SpCell #0, SCell #1, or SCell #2 is assumed to be a serving cell. Note that SpCell means a special cell (including a primary cell (PCell) and a primary secondary cell (PSCell)). SCell means 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 cell #2-1 and #2-2. In this way, one or more candidate cells (candidate serving cells) may be associated with a serving cell.

[0044] Regarding the setting of candidate cells (candidate cells) when changing the serving cell, for example, the following options 1 and 2 are possible.

[0045] <Option 1> As with inter-cell mobility in Rel. 17, the information in ServingCellConfig may include information about multiple candidate cells. In this case, the multiple candidate cells need to share the same PDCCH / PDSCH / UL configuration as the serving cell.

[0046] For example, in Rel. 17 inter-cell mobility, "mimoParam-r17" is added under ServingCellConfig, and PCI setting information is added. mimoParam-r17 may include additionalPCI-ToAddModList-r17, which is an information list of additional SSBs with PCIs different from the PCI of the serving cell. The same settings as the serving cell may be applied to candidate cells (additional cells, cells with additionalPCI), with the exception of some information.

[0047] <Option 2> Multiple candidate cells may be associated with each serving cell by reusing the carrier aggregation (CA) configuration framework, with a complete configuration (e.g., ServingCellConfig) corresponding to each cell. That is, the candidate cells may not share configuration information with the serving cell and may have a separate configuration. The UE is provided with the complete configuration for each candidate cell, allowing it to communicate properly with the candidate cells.

[0048] In the CA configuration framework, an SpCell can be configured for each cell group, and multiple SCells can be added. 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 be activated / deactivated by MAC CE. Candidate cells can be activated / deactivated by activating / deactivating TCI information corresponding to the candidate cells using MAC CE. This method is considered to be beneficial for reducing the complexity of UE operations.

[0049] Figure 3A shows a first example of Option 2. In the example of Figure 3A, a common candidate cell pool for cell switching in the MCG / SCG is applied to the candidate cells, i.e., the candidate cells are treated as one pool (group) regardless of frequency band.

[0050] Figure 3B is a diagram showing a second example of Option 2. In the example of Figure 3B, multiple cell groups are configured, and cell group switching is possible through L1 / L2 signaling. Candidate cells are configured for each cell group, and the configuration for each group includes the indices of the corresponding SpCell and SCell.

[0051] (Signaling for Serving Cell Change Indication) Implicit or explicit signaling for serving cell change indication for Rel. 18 and later will be described.

[0052] <Aspect 1> In aspect 1, implicit signaling for a serving cell change instruction will be described.

[0053] [[Option 1-1]] When a specific control resource set (CORESET) (e.g., at least one of CORESET#0, CORESET of CH5 Type0-CSS, and CORESET of CH6 / CH7 / CH8 CSS) is indicated (activated) by a MAC CE together with one or more TCI states associated with cells of PCIs different from that of the serving cell (when one or more TCI states associated with cells of PCIs different from that of the serving cell are indicated / activated by a MAC CE for a specific CORESET), the UE may determine to change the serving cell to another cell (cell x, a cell with a different PCI). In other words, this activation may implicitly indicate that the serving cell will be changed to another cell.

[0054] In this case, the UE may update 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.

[0055] [[Option 1-2]] When the MAC CE activates / deactivates the TCI states of the PDSCH, if all such TCI states activated by the MAC CE are associated with the same cell x having a PCI different from that of the serving cell, the UE may determine to change the serving cell to another cell (cell x), i.e., this association may implicitly indicate that the serving cell will be changed to another cell.

[0056] In the case where this option applies, if the NW (base station) does not change the serving cell, when the MAC CE activates the TCI state of a PDSCH associated with a cell with a different PCI, it must also include the TCI state related to another cell (e.g., the current serving cell or a second cell with a different PCI).

[0057] [[Options 1-3]] If the MAC CE activates / deactivates unified TCI states (e.g., corresponding to the unified TCI framework in Rel. 17) and all activated unified TCI states are associated with the same cell x with different PCIs, the UE may determine to change the serving cell to another cell (cell x), i.e., this association may implicitly indicate that the serving cell will be changed to another cell.

[0058] <Aspect 2> Explicit signaling for a serving cell change instruction will be described in aspect 2. In aspect 2, for example, the above-mentioned scenario 2 is applied.

[0059] [Option 2-1] An example of a serving cell change instruction will be described below. Note that activation / deactivation of a non-serving cell, change of a serving cell, and transmission / reception in another cell (non-serving cell) having a physical cell ID different from the physical cell ID of the serving cell may be interpreted as mutually interchangeable. Note that when a non-serving cell is activated, the non-serving cell may be determined to be the serving cell, or the current serving cell may be determined to become a non-serving cell.

[0060] The UE may receive a new MAC CE including at least one of the fields (information) indicating the following (1) to (3) corresponding to a non-serving cell, which is used for activating / deactivating the non-serving cell. When the UE receives the MAC CE, the UE may determine to change the serving cell to another cell (non-serving cell). Furthermore, the UE may control transmission and reception of DL signals / UL signals with the non-serving cell based on the information. Note that the non-serving cell may be one or multiple. In the example shown below, a MAC CE including multiple fields indicating multiple non-serving cell indexes is applied.

[0061] (1) Serving cell ID, (2) BWP ID, and (3) Non-serving cell ID used for activation. The non-serving cell ID may be replaced with any information corresponding to the non-serving cell (that can identify the non-serving cell).

[0062] As an example of (3), any of (3-1) to (3-5) may be applied. (3-1) PCI (PCI used directly). For example, 10 bits are used. (3-2) Re-creation index (new ID) of non-serving cells. The new ID may be associated with a part of the PCI and configured only for serving and non-serving cells used (available) by the UE. The new ID can reduce the number of bits compared to the PCI. (3-3) CSI reporting configuration ID (CSI-ReportConfigId) (when CSI-ReportConfig corresponds to one or more non-serving cells). (3-4) CSI resource configuration ID (CSI-ResourceConfigId) (when CSI-ResourceConfigId corresponds to one or more non-serving cells). (3-5) Bitmap indicating activation / deactivation of each non-serving cell. The size (number of bits) of the bitmap may be the same as the number of non-serving cells configured on this CC. For example, when activating the second non-serving cell among three non-serving cells, "010" is set.

[0063] At least one of the pieces of information included in the MAC CE may be included in the DCI. Alternatively, at least one of the serving cells activated by the MAC CE may be indicated by the DCI. The MAC CE / DCI may include a field indicating the TCI status / SSB / CSI-RS from a cell having a different PCI so that the UE can recognize the DL beam to monitor on the target cell (post-change serving cell). The UE may create and transmit a beam report (CSI report) using the TCI status / SSB / CSI-RS.

[0064] [[Option 2-2]] The UE may receive a MAC CE in which a new 1-bit field "C" is added to the existing MAC CE. The field indicates whether to change the serving cell. The UE may receive the MAC CE and determine whether to change the serving cell to another cell based on the field.

[0065] [Option 2-3] In addition to the MAC CE in Option 2-2, the MAC CE may further include a field indicating the serving cell index / PCI / other ID (such as the new ID in Option 2-1 above), and a field indicating the TCI state / SSB / CSI-RS of the target cell (the serving cell after the change).

[0066] In this way, since the instruction for the serving cell change instruction is indicated by the MAC CE / DCI, the UE can appropriately change the serving cell.

[0067] [Serving Cell Switch Example 1] Figure 4 is a diagram showing Serving Cell Switch Example 1. For example, for a serving cell SpCell #0 of an MCG / SCG, if an instruction to change the serving cell to candidate cell #0-2 is issued by L1 / L2 signaling, candidate cell #0-2 becomes the new serving cell SpCell #0. Also, for example, for a serving cell SCell #2 of an MCG / SCG, if an instruction to change the serving cell to candidate cell #2-1 is issued by L1 / L2 signaling, candidate cell #2-1 becomes the new serving cell SCell #2. Note that one serving cell may correspond to one HARQ entity, and candidate cells corresponding to the serving cell may correspond to the same HARQ entity (this may also be the case in other examples of the present disclosure).

[0068] Serving Cell Switch Example 2: The RRC / MAC CE can configure a global candidate cell ID (e.g., cell #0,..., #8) for each cell group, band, FR, and UE. The UE may be instructed to switch serving cells by the global candidate cell ID.

[0069] Figure 5 shows a serving cell switch example 2. Similar to Figure 3A, a pool of multiple candidate cells can be configured, and the serving cell can be switched to any (activated) candidate cell in the pool by L1 / L2 signaling. In this case, the configured candidate cell can become either an SpCell or a Sell based on L1 / L2 signaling.

[0070] The UE may receive an instruction to change the serving cell (in this example, an instruction to change the SpCell to candidate cell #4) via MAC CE / DCI. Then, the instructed candidate cell #4 becomes the SpCell.

[0071] [Serving Cell Switch Example 3] The RRC / MAC CE can configure a global candidate cell ID (e.g., cell #0-0, #0-1, ..., #2-2) for each cell group, band, FR, and UE. The UE may be instructed to switch serving cells by the global candidate cell ID. One or more global candidate cell IDs may be associated with each other (e.g., associated as one cell group). When a serving cell is changed to a cell with a global candidate cell ID, the UE may change another serving cell to a cell with the associated global candidate cell ID.

[0072] 6 is a diagram showing a serving cell switch example 3. The UE receives an instruction to change the serving cell (from cell #2-0 to cell #2-1) via MAC CE / DCI. The indicated cell #2-1 then becomes the SpCell of the new cell group. Furthermore, the cells (cell #0-0, cell #1-0) in the same cell group as the indicated cell #2-1 become Scell ​​#1 and Scell ​​#2. In other words, the serving cell group is switched.

[0073] (CSI Reporting Configuration) Fig. 7 is a diagram showing an overview of the CSI reporting configuration of RRC. Fig. 7 shows the CSI reporting configuration of RRC in 3GPP Rel. 17. As shown in Fig. 7, the CSI reporting configuration (CSI-ReportConfig) includes a resource setting for channel measurement (resourcesForChannelMeasurement), CSI-IM resource information for interference measurement (csi-IM-resourcesForInterference), NZP-CSI-RS resource information for interference measurement (nzp-CSI-RS-resourcesForInterference), a report quantity (Report quantity), etc. "resourcesForChannelMeasurement", "csi-IM-resourcesForInterference", and "nzp-CSI-RS-resourcesForInterference" correspond to the CSI resource configuration "CSI-ResourceConfig".

[0074] 8 is a diagram showing a portion of the CSI resource configuration for Rel. 17. This example is described using Abstract Syntax Notation One (ASN.1) notation. Note that this is merely an example, and therefore it is permitted that the description is not complete. In this drawing, RRC information elements / parameters with the same names as RRC information elements / parameters already defined in NR specifications up to Rel. 17 (e.g., 3GPP TS 38.331) will naturally be understood by those skilled in the art. These also apply to subsequent similar drawings.

[0075] As shown in FIG. 8, the CSI resource configuration (CSI-ResourceConfig) includes "csi-SSB-ResourceSetList." "csi-SSB-ResourceSetList" is a reference list of SSB resources used for CSI measurement and reporting among the CSI-RS resource sets. "csi-SSB-ResourceSetListExt-r17" is used to add elements to "csi-SSB-ResourceSetList" when the number of reporting groups (nrofReportedGroups-r17) is set in the CSI reporting configuration.

[0076] Fig. 9 is a diagram showing a portion of the CSI-SSB resource set of Rel. 17. As shown in Fig. 9, the CSI-SSB-ResourceSet includes "servingAdditionalPCIList-r17."

[0077] "servingAdditionalPCIList-r17" indicates the Physical Cell IDs (PCIs) of the SSBs included in the csi-SSB-ResourceList. If this parameter is present, this list has the same number of entries 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 so on. For each entry, if the value is zero, the corresponding PCI is the PCI of the serving cell for which this CSI-SSB-ResourceSet is defined. Otherwise (if the entry value is other than zero), the value of the entry is the additionalPCIIndex-r17 of SSB-MTC-AdditionalPCI-r17 in the additionalPCIList-r17 of the serving cell configuration (ServingCellConfig), and the PCI is the additionalPCI-r17 of this SSB-MTC-AdditionalPCI-r17.

[0078] That is, when a UE is configured with SSB-MTC-AdditionalPCI, the CSI-SSB-ResourceSet configured for L1-RSRP reporting includes one set of SSB indices and one set of PCI indices, and these SSB indices may be associated with PCI indices, where additionalPCIIndex-r17 is an integer greater than or equal to 1 and less than or equal to the maximum number of additional PCIs (maxNrofAdditionalPCI-r17), and additionalPCI-r17 is a PCI (e.g., an integer greater than or equal to 0 and less than or equal to 1007).

[0079] Figure 10 shows the configuration for L3 measurement / reporting in Rel. 17. associatedMeasGapSSB-r17 indicates the associated measurement gap for the SSB measurement identified in the measurement object ssb-ConfigMobility. When multiple MeasObjectNRs with the same SSB frequency are configured, the network sets the same measurement gap ID in this field for each MeasObjectNR. If this field is not present, the associated measurement gap is the gap configured via gapFR1, gapFR2, or gapUE.

[0080] associatedMeasGapCSIRS-r17 indicates the associated measurement gap for the CSI-RS measurement identified in the measurement object csi-rs-ResourceConfigMobility. If this field is absent, the associated measurement gap is the gap configured via gapFR1, gapFR2, or gapUE.

[0081] <Enhancement of L1 measurement reporting for L1 / L2 inter-cell mobility> When the RSs (mainly SSBs) of the serving cell and non-serving cells are configured in the same CSI reporting configuration (or in the same CSI resource configuration), the UE may report some additional indicators indicating the serving / non-serving cell in addition to the conventional reporting contents.

[0082] If new RRC parameters are configured, the UE may report the L3-RSRP value (per beam / cell / multibeam) in addition to the SSB index / CRI and L1-RSRP / L1-SINR values.

[0083] <Event-triggered L1 beam reporting for L1 / L2 inter-cell mobility> Aperiodic L1 beam reporting may be triggered by reusing one or more existing events for RRM defined in 3GPP TS 38.331. One or more new / separate events may be defined to trigger aperiodic L1 beam reporting. L1 beam reporting may be triggered by any combination of two or more events. The event may be any of the following events A2 to A6 and I1. In events A2 to A6, the measurement result may be at least one measurement result of RSRP (L1-RSRP / L3-RSRP), RSRQ, and SINR (RS-SINR).

[0084] Event A2: The measurement result of the serving cell is worse than the threshold. Event A3: The measurement result of the neighboring cell (the measurement result plus an offset) is better than the measurement result of the SpCell (the measurement result plus an offset). Event A4: The measurement result of the neighboring cell (the measurement result plus an offset) is better than the threshold. Event A5: The measurement result of the SpCell is worse than the first threshold and the measurement result of the neighboring cell (the measurement result plus an offset) is better than the second threshold. Event A6: The measurement result of the neighboring cell (the measurement result plus an offset) is better than the measurement result of the SCell (the measurement result plus an offset). Event I1: The interference measurement result is higher than the threshold.

[0085] (CSI Reporting Extension) <Analysis> In inter-cell mobility, it is preferable to support L1 beam measurement of multiple frequencies (inter-frequency measurement) to support switching of SpCell / SCell to a candidate cell of any frequency. However, L1 beam measurement / reporting by the existing CSI reporting configuration only supports the configuration of RS of the same frequency as the serving cell.

[0086] Fig. 11 is a diagram showing an example of RSRP values ​​in a plurality of frequencies. Fig. 11 shows that different RSRP values ​​(RSRP value #0-1, 1-1, 2-1) are measured for cells of different frequencies (SpCell #0, SCell #1, SCell #2). In such a case, how the settings related to L1 beam measurement / reporting are performed and how the measurement / reporting is performed will be described.

[0087] <Extension of CSI Measurement / Reporting Configuration (1)> An extension of the CSI measurement / reporting configuration will be described below to support frequency configuration for L1 beam measurement (CSI measurement) using reference signals (RS) (SSB / CSI-RS). For example, a UE may receive at least one of a channel state information (CSI) reporting configuration and a CSI resource configuration that indicate one or more frequencies, and control CSI measurement and CSI reporting using reference signals (RS) in the one or more frequencies.

[0088] [Option 1] At least one of the CSI reporting configuration (CSI-ReportConfig) and the CSI resource configuration (CSI-ResourceConfig) may 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). The ARFCN-ValueNR is used to indicate the ARFCN applied to the downlink, uplink, or bidirectional (TDD) NR global frequency raster. Each CSI reporting configuration / CSI resource configuration corresponds to one frequency. To support L1 beam measurement / reporting at multiple frequencies, multiple CSI reporting configurations are required. If the ARFCN-ValueNR is not present in the CSI reporting configuration, it may mean that the frequency is the same as the current serving cell configuration.

[0089] 12 is a diagram showing an example of CSI-SSB-ResourceSet in Option 1 of the L1 measurement / reporting configuration extension. CSI-SSB-ResourceSet is included in the CSI reporting configuration and CSI resource configuration. In FIG. 12, the SSB frequency configuration (ssbFrequency) corresponding to ARFCN-ValueNR is included.

[0090] [Option 2] At least one of the CSI reporting configuration and the CSI resource configuration may support configuring different frequencies (e.g., ARFCN-ValueNR) for each SSB / CSI-RS / PCI. Each CSI resource configuration / each CSI reporting configuration may support L1 beam measurement / reporting at multiple frequencies. In this case, since the RSRP comparison is an intra-frequency comparison, the beam report quantity setting and beam selection rules must also be enhanced. Inter-frequency comparison is usually performed based on SINR / RSRQ. SINR / RSRQ will be described later.

[0091] Figure 13 is a diagram showing an example of CSI-SSB-ResourceSet in Option 2 of the Layer 1 measurement / reporting configuration extension. CSI-SSB-ResourceSet is included in the CSI reporting configuration and CSI resource configuration. In Figure 13, a list of SSB frequencies (ssbFrequencyList-r18) and an SSB frequency configuration (ssbFrequency) are included.

[0092] The frequencies used for beam measurement / reporting may be configured / instructed by MAC CE / DCI. For example, a list of multiple frequencies may be configured by RRC (CSI report configuration / CSI resource configuration), and one or multiple frequencies in the list may be configured / instructed by MAC CE / DCI. The multiple frequencies may be frequencies of the serving cell and candidate cells.

[0093] By extending the L1 measurement / reporting settings as described above, one or more frequencies to be used for beam measurement / reporting can be appropriately set.

[0094] <Extension of CSI Measurement / Reporting Configuration (2)> Next, a case will be described in which the CSI resource configuration / CSI reporting configuration supports L1 beam (CSI) measurement / reporting at multiple frequencies. A UE receives a configuration / instruction indicating RSs (SSB / CSI-RSs) to be received at multiple frequencies in the CSI resource configuration / CSI reporting configuration, and performs CSI (L1-RSRP / L1-SINR) measurement and reporting using the RSs.

[0095] The UE may control (send) the transmission of one CSI report including both Layer 1 Reference Signal Received Power (L1-RSRP) and Layer 1 Signal to Interference plus Noise Ratio (L1-SINR).The UE may control (send) the transmission of one CSI report including CSI (L1-RSRP / L1-SINR) measurements on multiple frequencies.

[0096] The UE may configure a reporting quantity for both L1-RSRP and L1-SINR to report both L1-RSRP and L1-SINR for a beam index. The beam index / report result located at the beginning of the CSI report may correspond to the beam with the largest L1-RSRP / L1-SINR or may correspond to an explicit beam (by a field in the CSI report). Differential quantization may be performed on each of the L1-RSRP and L1-SINR values. To select a beam for reporting, the UE may compare the L1-RSRP for each frequency.

[0097] FIG. 14 is a diagram showing an example of a CSI report for multiple frequencies. In the example of FIG. 14, the CSI report includes the largest absolute value of L1-RSRP (L1-RSRP #1) and differential values ​​from this absolute value (Differential RSRP #2, #3, #4). The CSI report also includes the largest absolute value of L1-SINR (L1-SINR #3) and differential values ​​from this absolute value (Differential RSRP #1, #2, #4). The CSI report also includes, at the beginning (first line), an indication of the beam having the largest L1-SINR. In this example, beam #3 is indicated as the beam having the largest L1-SINR.

[0098] When measuring RSs at multiple frequencies and selecting a beam to report, the UE may first compare L1-RSRPs at the same frequency and then compare L1-SINRs between different frequencies. The UE may first compare L1-SINRs between different frequencies and then compare L1-RSRPs at the same frequency.

[0099] FIG. 15 is a diagram showing an example of a CSI measurement / reporting method in multiple frequencies. In the example of FIG. 15, CSI reporting is performed for cells (SpCell #0, SCell #1, SCell #2) with different frequencies. In this example, since there are 64 beams (SSBs) per cell, the UE measures the L1-RSRP and L1-SINR of 64×3 beams. In this example, it is assumed that the L1-RSRP of SSB #3 of SCell #1 is the highest, followed by the L1-RSRP of SSB #1 of SpCell #0. The UE reports the absolute value of the L1-RSRP of SSB #3 of SCell #1 and the differential value of the L1-RSRP of SSB #1 of SpCell #0.

[0100] For an RS / Cell configured in the CSI reporting configuration, for example, in an SpCell, all candidate cells for a serving cell switch may be configured in the CSI reporting configuration at the time of L1 measurement. Then, the NW (base station) may determine whether to perform a cell switch based on the L1 measurement and report results.

[0101] The CSI report may include information indicating the frequency or PCI on which the RS for which the L1-RSRP / L1-SINR is to be measured is transmitted.

[0102] As described above, both L1-RSRP and L1-SINR can be reported in one CSI report. Also, CSI measurement results (L1-RSRP / L1-SINR) for multiple frequencies can be reported in one CSI report. Generally, interference differs depending on the frequency (CC), so the L1-SINR has a different value. By applying the above example, the UE can report L1-SINR for different frequencies, so the NW can, for example, grasp the L1-SINR of a candidate cell to switch to.

[0103] When CSI measurement / reporting at multiple frequencies is used for configuring CSI measurement / reporting between cells, the configuration of SSB based Measurement Timing Configuration (SMTC) and Measurement Gap (MG) for the frequency, PCI, specific RS of PCI, UE, and CSI resource configuration may be added to the CSI reporting configuration.

[0104] <L3 Measurement / Reporting> The UE may receive configuration information for Layer 3 (L3) measurement / reporting, including configuration for beam (CSI) measurement / reporting using Layer 1 (L1) reference signals (SSB / CSI-RS). The UE may then control L1 and L3 measurement / reporting based on the configuration information. For example, as shown in FIG. 10, MeasObjectNR, which is configuration information related to L3 measurement / reporting, may include a frequency configuration for RRM measurement (e.g., ARFCN-ValueNR).

[0105] [Option 1] The configuration information (MeasObjectNR) for L3 measurement / reporting may include an indication of whether it is for conventional L3 RRM measurement or for L1 beam measurement. If L1 beam measurement is indicated, the configuration information may further include some configuration for L1 measurement / reporting in the CSI reporting configuration (e.g., reporting quantity).

[0106] [Option 2] Configuration information for one L3 measurement / report (MeasObjectNR) may include multiple frequencies and PCI / RS configurations corresponding to different frequencies for L1 beam measurement / report. L1 measurement results and L3 measurement results may be configured to be reported in separate CSI reports or in a single CSI report.

[0107] [CSI Reporting] The UE may report L3 measurement results (L3-RSRP value per beam / cell / multi-beam) in inter-frequency (multi-frequency) L1 beam reporting (CSI reporting). The UE may report L1 measurement results in reporting L3 measurement results. The UE may report the L1 measurement results using at least one of RRC IE, MAC CE, and Uplink Control Information (UCI).

[0108] Inter-frequency (multi-frequency) L1 measurements / reports may be configured as event triggers, for example, when a specific event occurs, the UE may perform inter-frequency (multi-frequency) L1 measurements / reports.

[0109] Alternatively, the UE may receive configuration information (CSI reporting configuration / CSI resource configuration) for beam measurement / reporting via SSB / CSI-RS of L1, including configuration for measurement / reporting of Layer 3 (L3).

[0110] As described above, it is possible to perform the configuration of Layer 1 and Layer 3 together, thereby suppressing signaling overhead. When this embodiment is used for the configuration of L1 measurement / reporting between cells, the SMTC and MG configuration for L3 measurement in MeasObjectNR can be reused for L1 measurement.

[0111] (L1 Beam Measurement / Reporting When Inter-Frequency Cell Switching is Supported) When inter-frequency cell switching is supported, as shown in the example of FIG. 5, it is preferable to perform CSI measurement / reporting between different frequencies based on a single configuration. Otherwise, the gNB needs to independently configure L1 beam measurement / reporting for each frequency to obtain beam quality from cells of different frequencies. Furthermore, to compare beam quality between different frequencies, reporting only L1-RSRP or only L1-SINR may be insufficient. In other words, both L1-RSRP and L1-SINR may be required. By appropriately performing CSI measurement / reporting between different frequencies, the configuration / reporting overhead for obtaining the optimal beam / cell at different frequencies can be reduced.

[0112] CSI reporting in multiple frequencies has been described in FIG. 14 and other figures, but below, an example of CSI measurement / reporting in multiple frequencies (measurement / reporting of L1-RSRP / L1-SINR) will be described in more detail.

[0113] <Measurement / Reporting of L1-RSRP / L1-SINR (1)> An example of CSI resource configuration (CSI-ResourceConfig) / CSI reporting configuration (CSI-ReportConfig) when L1 beam measurement / reporting (e.g., L1 beam measurement / reporting) of a cell of one or more frequencies is supported will be described.

[0114] In inter-cell mobility, to support switching of an SpCell / SCell to a candidate cell (or additional cell, target cell) of any frequency, L1 beam measurements (inter-frequency measurements) of multiple frequencies may be supported. The L1 beam measurements / reports (or CSI measurements / reports) for multiple frequencies (or frequency domains) may include at least one of Layer 1 Reference Signal Received Power (L1-RSRP) and Layer 1 Signal to Interference plus Noise Ratio (L1-SINR).

[0115] The UE may receive information regarding the CSI resource configuration / CSI reporting configuration of one or more candidate cells corresponding to different frequencies, and may perform a CSI report / beam report including at least one of the L1-RSRP and L1-SINR of each candidate cell based on the information.

[0116] For example, the UE may report CSI including one of the L1-RSRP and the L1-SINR, or both the L1-RSRP and the L1-SINR, for a certain cell (e.g., a candidate cell) or a certain frequency (e.g., a frequency corresponding to the candidate cell) (see FIG. 14). FIG. 14 shows an example of a case where both the L1-RSRP and the L1-SINR are included in a certain CSI report (e.g., CSI report #n).

[0117] The beam selection rule (or the selection rule of the CSI to be reported) may be predefined in the specification or may be configured by RRC signaling. The beam selection (or the selection of the CSI to be reported) may be based on both the L1-RSRP and the L1-SINR.

[0118] The UE may select a beam (or select CSI to report) based on a specific higher layer parameter. The specific higher layer parameter may be, for example, a report quantity (e.g., reportQuantity) included in a CSI reporting configuration (e.g., CSI-ReportConfig). On the other hand, when either L1-RSRP or L1-SINR is configured by the specific higher layer parameter, the UE may control to include one of the configured L1-RSRP and L1-SINR in the CSI report and not include the other in the CSI report.

[0119] For example, the UE may determine beam selection (or CSI to report) based on at least one of the following options 1-1 to 1-3.

[0120] [Option 1-1] Configuration of both L1-RSRP and L1-SINR may be supported by a specific higher layer parameter (e.g., reportQuantity) so that both L1-RSRP and L1-SINR can be reported for a beam index (or CSI index).

[0121] For example, if reporting of both L1-RSRP and L1-SINR is configured by a specific higher layer parameter, the UE reports CSI including L1-RSRP and L1-SINR.

[0122] Even when both L1-RSRP and L1-SINR reporting are configured, if a specific condition is met, the amount of CSI reporting may be reduced (or some CSI reporting may not be performed). The overhead of CSI reporting may be reduced based on at least one of the following Option 1-1A and Option 1-1B.

[0123] <<Option 1-1A>> The UE may determine what to report (or what measurement results to include in CSI) based on at least one of the L1-RSRP measurement results and the L1-SINR measurement results. For example, the UE may determine whether to report both the L1-RSRP and the L1-SINR (or whether to report one of them) based on at least one of the L1-RSRP measurement results and the L1-SINR measurement results. When reporting only one of the L1-RSRP and the L1-SINR, the UE may determine which measurement result to report based on the L1-RSRP measurement results and the L1-SINR measurement results.

[0124] The UE may always include one measurement result (e.g., L1-RSRP) in the CSI and may decide whether to report the other measurement result (e.g., L1-SINR) based on at least one of the L1-RSRP measurement result and the L1-SINR measurement result.

[0125] The UE may indicate the measurement results to be reported. For example, if the UE reports only one of L1-RSRP and L1-SINR, the UE may indicate which measurement results to report. For example, the measurement results to be reported may be indicated using a specific field included in the CSI.

[0126] <<Option 1-1B>> The UE may report both the L1-RSRP and the L1-SINR for a specific beam / cell, and may report only one of the L1-RSRP and the L1-SINR for other beams / cells (or the remaining beams / cells). In the present disclosure, the specific beam / cell may 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).

[0127] 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 content of the report, or the content of the report may be determined based on a specific rule. The specific rule may be, for example, a rule that reports measurement results that exceed a threshold set / defined for L1-RSRP and a threshold set / defined for L1-SINR. The threshold for L1-RSRP / L1-SINR may be set separately by higher layer signaling.

[0128] In this way, even if reporting of both L1-RSRP and L1-SINR is configured / defined, the increase in overhead of CSI reporting can be suppressed by allowing / supporting reporting of only one of them based on specific conditions.

[0129] [Option 1-2] Configuration / indication of only one of L1-RSRP and L1-SINR may be supported by a specific higher layer parameter (e.g., reportQuantity) / DCI. The UE controls to report the configured / indicated measurement result (either L1-RSRP or L1-SINR).

[0130] [Options 1-3] Configuration / indication of only one of L1-RSRP and L1-SINR may be supported by a specific higher layer parameter (e.g., reportQuantity) / DCI. The UE may report both L1-RSRP and L1-SINR for a specific beam / cell, and may report measurement results (only one of L1-RSRP and L1-SINR) configured / indicated by the higher layer parameter / DCI for other beams / cells (or the remaining beams / cells).

[0131] The specific cell may be autonomously determined by the UE, configured by higher layer parameters, or may be reported when a measurement result of a CSI report (L1-RSRP or L1-SINR) that is not configured by higher layers exceeds a predefined / configured threshold.

[0132] In this way, even if reporting of only one of L1-RSRP and L1-SINR is configured / defined, detailed CSI reporting can be performed for a specific beam / cell by allowing / supporting reporting of both L1-RSRP and L1-SINR for a specific cell.

[0133] [UE Capabilities] When the CSI resource configuration (CSI-ResourceConfig) / CSI reporting configuration (CSI-ReportConfig) supports L1 beam (or CSI) measurement / reporting of cells of multiple frequencies, a UE capability regarding the number of cells (or beams, CSI numbers) to be configured / reported may be introduced. For example, a UE capability regarding the number of cells (or beams, CSI numbers) to be configured / reported for each CSI resource configuration / each CSI reporting configuration / each frequency may be supported. A UE capability regarding the number of cells (or beams, CSI numbers) to be configured / reported across CSI resource configurations / CSI reporting configurations / frequencies may be supported.

[0134] <L1-RSRP / L1-SINR Measurement / Reporting (2)> Another example of CSI resource configuration (CSI-ResourceConfig) / CSI report configuration (CSI-ReportConfig) when L1 beam measurement / reporting (e.g., L1 beam measurement / reporting) of a cell of one or more frequencies is supported will be described. The following example may be applied in combination with the above-described L1-RSRP / L1-SINR measurement / reporting (1).

[0135] When the CSI resource configuration (CSI-ResourceConfig) / CSI report configuration (CSI-ReportConfig) supports L1 beam measurement / reporting of a cell of a certain frequency, the CSI resource configuration / CSI report configuration may include information about the frequency (e.g., frequency configuration). L1 beam measurement / reporting may be read as CSI measurement / reporting.

[0136] The frequency configuration may be a frequency configuration (e.g., an absolute radio-frequency channel number (ARFCN)-ValueNR) corresponding to a reference signal for measurement (e.g., SSB / CSI-RS). The ARFCN-ValueNR is used to indicate the ARFCN applied to the downlink, uplink, or bidirectional (TDD) NR global frequency raster. Each CSI reporting configuration / CSI resource configuration corresponds to one frequency. Multiple CSI reporting configurations are required to support L1 beam measurement / reporting on multiple frequencies. If the ARFCN-ValueNR is not present in the CSI reporting configuration, it may mean that the frequency is the same as the current serving cell configuration.

[0137] A frequency configuration (e.g., frequency configuration) indicating a frequency for measuring / reporting CSI and a report amount (e.g., reportQuantity) indicating the content of CSI measurement / reporting (e.g., L1-RSRP, L1-SINR) may be configured in the UE. The configuration shown in the first embodiment may be applied to the setting / reporting of the report amount.

[0138] For example, one CSI reporting configuration (or each CSI reporting configuration) may include a frequency configuration (e.g., frequency configuration) and a report amount (e.g., reportQuantity). A configuration may be supported in which measurement / reporting of both L1-RSRP and L1-SINR is configured for a certain cell (or frequency), and measurement / reporting of only one of L1-RSRP and L1-SINR 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 report amount (e.g., reportQuantity).

[0139] For example, the UE may determine beam selection (or CSI to report) based on at least one of the following options 2-1 to 2-3.

[0140] [Option 2-1] The configuration of both L1-RSRP and L1-SINR may be supported by a specific higher layer parameter (e.g., reportQuantity) so that both L1-RSRP and L1-SINR can be reported for a beam index (or CSI index) of a certain cell (or a certain frequency).

[0141] For example, when both L1-RSRP and L1-SINR are configured for a certain cell or frequency according to specific higher layer parameters (e.g., frequency configuration and report quantity), the UE reports CSI including the L1-RSRP and L1-SINR corresponding to the frequency.

[0142] Alternatively, if a specific condition is met, the amount of CSI reporting may be reduced (or some CSI reporting may not be performed). The overhead of CSI reporting may be reduced based on at least one of the following Option 2-1A and Option 2-1B.

[0143] <<Option 2-1A>> The UE may determine what to report (or what measurement results to include in CSI) based on at least one of the L1-RSRP measurement results and the L1-SINR measurement results. For example, the UE may determine whether to report both the L1-RSRP and the L1-SINR based on at least one of the L1-RSRP measurement results and the L1-SINR measurement results. When reporting only one of the L1-RSRP and the L1-SINR, the UE may determine which measurement result to report based on the L1-RSRP measurement results and the L1-SINR measurement results.

[0144] Alternatively, the UE may always include one measurement result (e.g., L1-RSRP) in the CSI and determine whether to report the other measurement result (e.g., L1-SINR) based on at least one of the L1-RSRP measurement result and the L1-SINR measurement result.

[0145] The UE may indicate the measurement results to be reported. For example, if the UE reports only one of L1-RSRP and L1-SINR, the UE may indicate which measurement results to report. For example, the measurement results to be reported may be indicated using a specific field included in the CSI.

[0146] <<Option 2-1B>> The UE may report both the L1-RSRP and the L1-SINR for a specific beam / cell, and may report only one of the L1-RSRP and the L1-SINR for other beams / cells (or the remaining beams / cells). In the present disclosure, the specific beam / cell may 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.

[0147] 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 content of the report, or the content of the report may be determined based on a specific rule. The specific rule may be, for example, a rule that reports measurement results that exceed a threshold set / defined for L1-RSRP and a threshold set / defined for L1-SINR. The threshold for L1-RSRP / L1-SINR may be set separately by higher layer signaling.

[0148] In this way, even if reporting of both L1-RSRP and L1-SINR is configured / defined, the increase in overhead of CSI reporting can be suppressed by allowing / supporting reporting of only one of them based on specific conditions.

[0149] [Option 2-2] Configuration / indication of only one of L1-RSRP and L1-SINR for a certain cell or frequency may be supported by specific higher layer parameters (e.g., frequency configuration and report quantity) / DCI. The UE controls to report the configured / indicated measurement result (either L1-RSRP or L1-SINR).

[0150] [Option 2-3] Configuration / indication of only one of L1-RSRP and L1-SINR for a certain cell or frequency may be supported by specific higher layer parameters (e.g., frequency configuration and report quantity) / DCI. The UE may report both L1-RSRP and L1-SINR for a specific beam / cell / frequency, and may report measurement results (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).

[0151] The specific cell may be autonomously determined by the UE, configured by higher layer parameters, or may be reported when a measurement result of a CSI report (L1-RSRP or L1-SINR) that is not configured by higher layers exceeds a predefined / configured threshold.

[0152] In this way, even if reporting of only one of L1-RSRP and L1-SINR is configured / defined, detailed CSI reporting can be performed for a specific beam / cell by allowing / supporting reporting of both L1-RSRP and L1-SINR for a specific cell.

[0153] (Analysis) As mentioned above, it is considered that the serving cell is switched to a cell (additional cell / candidate cell) of a different PCI from the serving cell by signaling at least one of layer 1 and layer 2 (layer 1 / layer 2 inter-cell mobility).

[0154] Also, for L1 / L2 inter-cell mobility, it is being considered that the UE reports the CSI as described above.

[0155] However, if the content of the CSI report received from the UE includes only measurement results related to beams of only the serving cell or only the candidate cell, the network cannot obtain measurement results of the switch candidate or switch source, making it difficult to make a cell switch decision. In this way, if an appropriate CSI report is not reported, problems such as suppressing improvement in communication throughput and deteriorating communication quality may occur.

[0156] Therefore, the present inventors have conceived a method for appropriately reporting CSI for multiple cells.

[0157] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0158] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0159] In the present disclosure, terms such as notify, activate, deactivate, indicate (or indicate), select, configure, update, and determine may be read interchangeably. In the present disclosure, terms such as support, control, controllable, operate, and operate may be read interchangeably.

[0160] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0161] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., messages from the core network such as positioning protocol (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP)) messages), or a combination thereof.

[0162] In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0163] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0164] In the present disclosure, a cell group, a serving cell group, a master cell group (MCG), and a secondary cell group (SCG) may be interchangeable. A serving cell may be included in a cell group. L1 / L2, L1 / L2 signaling, and DCI / MAC CE may be interchangeable. A serving cell may be replaced with a cell that transmits a PDSCH. A candidate cell may refer to a cell that is a candidate to become a serving cell through L1 / L2 inter-cell mobility.

[0165] In the present disclosure, the terms cell, PCI, serving cell, source serving cell, source cell, CC, BWP, BWP within CC, and band may be interchangeable. In the present disclosure, the terms cell, PCI, cell with an additional PCI, additional cell, other cell, non-serving cell, cell with a different PCI, candidate cell, candidate serving cell, cell with a PCI different from the PCI of the current serving cell, another serving cell, and target cell may be interchangeable. In the present disclosure, the terms switch, change, and update may be interchangeable. The term serving cell may be interchangeable with the serving cell before the switch or the serving cell after the switch.

[0166] In the present disclosure, PCI may be interchangeably read as any indicator indicating a cell (e.g., Cell Global Identity (CGI), NR Cell Global Identity (NCGI), NR Cell Identity (NCI)), etc.

[0167] In the present disclosure, beam measurement / report, L1 beam measurement / report, L1 measurement / report, and CSI measurement / report may be interchangeable. L1 may indicate at least one of L1-RSRP and L1-SINR. RS may be at least one of CSI-RS and SSB. L1-RSRP and L1-SINR may be interchangeable. RS, beam, beam RS, beam index, SSB, SSB index, SSBRI (SS / PBCH Block Resource Indicator), CSI-RS index, and CRI (CSI-RS Resource Indicator) may be interchangeable.

[0168] In the present disclosure, a CSI report may be interchangeably read as a beam report. In the present disclosure, a report related to a beam may be interchangeably read as beam-related information, a beam-related CSI field, etc. In the present disclosure, a measurement result may be interchangeably read as at least one of an L1-RSRP, an L1-SINR, other power / quality-related indicators, etc.

[0169] In the present disclosure, the terms event and condition may be interchangeable. In the present disclosure, the terms cell and frequency may be interchangeable.

[0170] In the following description of the embodiments, the serving cell is assumed to mean an SpCell, which is a source cell for L1 / L2 mobility, but may be interpreted as at least one of an SpCell and an SCell. The following embodiments may be implemented when a UE is configured for multi-TRP, or may be implemented regardless of the multi-TRP configuration (even when no configuration is performed).

[0171] (Wireless communication method) Hereinafter, embodiments related to at least one of the following cases A to E will be described: - Case A: One CSI report includes a report on at least one beam of a serving cell (e.g., beam index / measurement result); - Case B: One CSI report includes a report on both the beam of the serving cell and the beam of a candidate cell; - Case C: One CSI report includes a report on at least one beam of a candidate cell; - Case D: One CSI report includes only a report on the beam of a candidate cell; - Case E: There is no restriction on the reports on the beams of the serving cell / candidate cell included in one CSI report (one CSI report includes a report on both or either the beam of the serving cell and the beam of the candidate cell).

[0172] Note that an RRC parameter may be configured in the UE such that (a CSI report based on) certain CSI reporting configuration information (CSI-ReportConfig) corresponds to at least one of the above cases A to E. Based on the RRC parameter, the UE may determine to include a report on the beams of the serving cell / candidate cell in the CSI report.

[0173] First Embodiment The first embodiment relates to a method for ensuring that a UE includes a report on the beam of at least one serving cell in one CSI report. The first embodiment is preferred for Case A.

[0174] In the first embodiment, a configuration for reporting (a configuration for each cell / frequency, a configuration across cells / frequencies) may be configured for a UE using CSI reporting configuration information. For example, among the RSs configured for the CSI reporting configuration information, the total number of RSs to be reported (hereinafter also referred to as X) is configured for the UE. Note that in the present disclosure, the number of RSs to be configured may also be referred to as a configuration number / constraint number.

[0175] The UE may determine (select) the RSs to be reported by one CSI report according to at least one of embodiments 1.1 to 1.5: - embodiment 1.1: selecting X-1 RSs from the serving cell / candidate cell and selecting one additional RS from the serving cell; - embodiment 1.2: selecting X RSs from the serving cell / candidate cell and selecting one additional RS from the serving cell; - embodiment 1.3: selecting X-1 RSs from the candidate cell and selecting one additional RS from the serving cell; - embodiment 1.4: selecting X RSs from the candidate cell and selecting one additional RS from the serving cell; - embodiment 1.5: selecting X RSs from the serving cell / candidate cell.

[0176] In addition, in embodiments 1.1 to 1.5, "serving cell" may be interchangeably read as "serving cell only," and "candidate cell" may be interchangeably read as "candidate cell only." Also, in embodiments 1.1 to 1.4, "additionally selecting" may mean selecting after selecting X-1 (or X) RSs, but the timing of selection may be in any order.

[0177] In embodiments 1.1 / 1.2, the selection of X−1 (or X) RSs from a serving cell / candidate cell may be based on a specific beam selection method. In the present disclosure, the specific beam selection method may be, for example, the beam selection method / beam selection rule in the above-mentioned L1-RSRP / L1-SINR measurement / report (1) or (2), or may be an extended / modified beam selection method / beam selection rule thereof (e.g., selecting a beam by comparing L1-RSRP / L1-SINR for RSs of multiple frequencies). Furthermore, in embodiments 1.1 / 1.2, one RS selected from the serving cell may be an RS different from the above-mentioned X−1 (or X) RSs and may be an RS corresponding to the RS of the serving cell.

[0178] In embodiments 1.3 and 1.4, the selection of X-1 (or X) RSs from the serving cell / candidate cell may be based on a specific beam selection method. Also, in embodiments 1.3 and 1.4, one RS selected from the serving cell may be, for example, an RS having the largest RSRP / SINR among the RSs of the serving cell.

[0179] In embodiment 1.5, the selection of X RSs from the serving cell / candidate cell may be based on a specific beam selection method. If the X RSs selected based on the specific beam selection method include an RS of the serving cell, the UE may transmit a CSI report for the X RSs. If the X RSs selected based on the specific beam selection method do not include an RS of the serving cell, the UE may update at least one RS of the X RSs (e.g., an RS having the smallest RSRP / SINR) by replacing it with an RS of the serving cell, and transmit a CSI report for the updated X RSs.

[0180] In embodiments 1.1, 1.3, and 1.5, the UE / network may recognize that the number of RSs reported in one CSI report is X. In embodiments 1.2 and 1.4, the UE / network may recognize that the number of RSs reported in one CSI report is X+1. That is, X in embodiments 1.2 and 1.4 may mean the number of reported RSs of the serving cell / candidate cell excluding one reported RS of the serving cell.

[0181] The UE may generate and send a CSI report including fields related to the determined X (or X+1) RSs to the network.

[0182] In the first embodiment, the number of RSs selected from the serving cell or the maximum number of RSs may be determined in advance or may be set by higher layer signaling.

[0183] In addition, in the first embodiment, the configuration for reporting (configuration per cell / frequency, configuration across cells / frequencies) may be applied only to the candidate cell, or may be applied to all cells including the serving cell and the candidate cell (all configured cells).

[0184] According to the first embodiment described above, the CSI report can reliably notify reports regarding the beam of the serving cell, so that the network can preferably make L1 / L2 decisions based on the CSI report.

[0185] <Modification of First Embodiment> In the first embodiment, the total number of RSs X to be reported does not particularly distinguish between frequencies. In a modification of the first embodiment, at least one of the number of RSs (hereinafter also referred to as Y) to be reported for each frequency (for example, frequency index (ARFCN-ValueNR)) and the number of frequencies (hereinafter also referred to as Z) to be reported may be configured for the UE. Note that at least one of these may be predetermined in a standard.

[0186] The UE may determine RSs for the same frequency as the serving cell to be reported by one CSI report according to at least one of embodiments 1.1' to 1.5': - embodiment 1.1': selecting Y-1 RSs from the serving cell / candidate cells on the same frequency as the serving cell and selecting one additional RS from the serving cell; - embodiment 1.2': selecting Y RSs from the serving cell / candidate cells on the same frequency as the serving cell and selecting one additional RS from the serving cell; - embodiment 1.3': selecting Y-1 RSs from the candidate cells on the same frequency as the serving cell and selecting one additional RS from the serving cell; - embodiment 1.4': selecting Y RSs from the candidate cells on the same frequency as the serving cell and selecting one additional RS from the serving cell; - embodiment 1.5': selecting Y RSs from the serving cell / candidate cells on the same frequency as the serving cell.

[0187] The determination of the RS for the same frequency as the serving cell in each of embodiments 1.1' to 1.5' may be realized according to the above-mentioned embodiments 1.1 to 1.5, except that the serving cell / candidate cell is replaced with the serving cell / candidate cell for the same frequency as the serving cell, and X is replaced with Y.

[0188] The UE may determine RSs for the serving cell and different frequencies (=Z-1 frequencies) reported by one CSI report, and for each of these frequencies, the UE may select Y RSs based on a specific beam selection method.

[0189] In embodiments 1.1' / 1.3' / 1.5', the UE / network may know that the number of RSs reported in one CSI report is Y*Z. In embodiments 1.2' / 1.4', the UE / network may know that the number of RSs reported in one CSI report is Y*Z+1.

[0190] The UE may generate and send a CSI report including fields related to the determined Y*Z (or Y*Z+1) RSs to the network.

[0191] <Variation 2 of First Embodiment> Variation 2 of the first embodiment relates to a method for ensuring that the UE includes a report on the beam of at least one candidate cell in one CSI report. Variation 2 of the first embodiment is preferred for Case C.

[0192] The second modification of the first embodiment may be realized in accordance with the first embodiment described above, where the serving cell is replaced with the candidate cell and the candidate cell is replaced with the serving cell.

[0193] Second Embodiment The second embodiment relates to a method in which a UE includes a report on one or both of the beams of the serving cell and the beams of the candidate cells in one CSI report. The second embodiment is preferred for Cases A and B.

[0194] In the second embodiment, a configuration for a serving cell for reporting (configuration for each cell / frequency, configuration across cells / frequencies) and a configuration for a candidate cell for reporting (configuration for each cell / frequency, configuration across cells / frequencies) may be configured separately for a UE. For example, among the RSs configured for CSI reporting configuration information, the number of RSs for a serving cell to be reported (hereinafter, X ｓ ) and the number of RSs for the reported candidate cell (hereinafter referred to as X ｃ At least one of the following may be notified to the UE. Note that at least one of these may be determined in advance in a standard.

[0195] The total number of RSs reported by one CSI report is X ｓ +X ｃ Corresponds to: X ｓ and X ｃ may be the same value or may be different values. ｓ is X ｃ or less, X ｃ It may be more than or equal to X ｓ and X ｃ At least one of the following may be 0. ｓ and X ｃIf both are 0, the UE may not include reports on both the beam of the serving cell and the beam of the candidate cell in the corresponding CSI report, or may not transmit the CSI report.

[0196] The UE receives X serving cells reported by one CSI report. ｓ The UE may select X RSs from the RSs of the serving cell based on a specific beam selection method. ｃ The RSs may be selected from the RSs of the candidate cells based on a particular beam selection method.

[0197] In addition, X ｓ Regarding the number of RSs per serving cell, the number of RSs for each serving cell may be configured in the UE, or the number of RSs across all serving cells may be configured in the UE. In the former case, for example, when a first serving cell and a second serving cell are configured in the UE, the number of RSs for the first serving cell to be reported and the number of RSs for the second serving cell to be reported may be configured in the UE, respectively. The number of RSs for the first serving cell to be reported and the number of RSs for the second serving cell to be reported may be set to different values, and the sum of these may be X ｓ It may also correspond to X. ｓ Information directly indicating the value itself may or may not be set.

[0198] X ｃ Regarding X, the number of RSs for each cell / frequency may be configured in the UE, or the number of RSs across cells / frequencies may be configured in the UE. For example, the configuration (number of RSs to be reported) for a candidate cell with the same frequency as the serving cell and the configuration (number of RSs to be reported) for a candidate cell with a frequency different from that of the serving cell may be set differently (or to different values). ｃ Information directly indicating the value itself may or may not be set.

[0199] According to the second embodiment described above, a report on the beam of the serving cell can be notified by the CSI report, and therefore the network can preferably make an L1 / L2 decision based on the CSI report.

[0200] Third Embodiment The third embodiment relates to the contents of a CSI report.

[0201] As described above, in Rel. 17 NR, the CSI-SSB-resource set (CSI-SSB-ResourceSet) includes servingAdditionalPCIList-r17, and is configured in the UE, thereby sharing the correspondence between SSB indexes and PCI indexes (and thus additional PCIs) between the network and the UE. Based on the SSB index included in the CSI report, the network can recognize whether the corresponding measurement result was performed on the serving cell or a candidate cell (additional cell).

[0202] On the other hand, for cases A to E described above, it is assumed that all measurement results (e.g., L1-RSRP) included in the CSI report are associated with the serving cell only, the candidate cell only, or both.

[0203] In the third embodiment, the UE may configure one or both of the correspondence relationship between the SSB index and the PCI index and the correspondence relationship between the PCI index and the additional PCI, or may not configure one or both. Furthermore, if one or both of these are not configured in the UE, the UE may include, in the CSI report, information (field) indicating the PCI index or PCI (or additional PCI) corresponding to the beam-related report (e.g., beam index / measurement result).

[0204] 16 is a diagram illustrating an example of the contents of a CSI report according to the third embodiment. In this example, the CSI report includes a field (PCI#i) indicating a PCI corresponding to the i-th (i = 1 to 4) measurement result.

[0205] The UE may arrange measurement results related to the RS of a specific cell in a specific position. In this case, a field indicating the PCI for the specific cell may not be included in the CSI report. For example, as described in embodiments 1.1 to 1.4, if measurement results related to the RS of an additionally selected serving cell are arranged in a specific position (e.g., the fourth position), the UE may not include a PCI#4 field in the CSI report.

[0206] In the CSI report, a field for the serving cell and a field for the candidate cell may be distinguished. For example, in the X ｓ and X ｃ is configured in the UE, the CSI report may include fields for each beam, for example in one of the following orders: A, B, C, D, C, D, A, B, A, C, B, D, C, A, D, B.

[0207] Here, A is X ｓ The best beam among RSs, B is X ｓ The remaining beams of RS, C, are X ｃ The best beam among the RSs, D is X ｃ The remaining beams of the RSs are shown in FIG.

[0208] The CSI report may include fields for each beam in any order from A, B, C, and D.

[0209] FIG. 17 is a diagram illustrating an example of the contents of a CSI report according to the third embodiment. In this example, a CSI report including fields related to each beam in the order of A, B, C, and D is illustrated. ｓ The field corresponding to #2_j (j=1 to X −1) is a field related to the beam of the serving cell, ｃ The field corresponding to −1) is a field related to the beam of the candidate cell. In this example, the field related to the beam of the serving cell is placed before (at the beginning of) the field related to the beam of the candidate cell.

[0210] <Supplementary Information> [Notification of Information to UE] In the above-described embodiments, any information may be notified to the UE (from a network (NW) (e.g., a base station (BS))) (in other words, reception of any information from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0211] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader, which is not defined in existing standards.

[0212] When the notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0213] Furthermore, notification of any information to the UE in the above embodiments may be performed periodically, semi-persistently, or aperiodically.

[0214] [Notification of Information from UE] In the above-described embodiments, notification of any information from the UE (to the NW) (in other words, transmission / report of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0215] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID, which is not defined in existing standards, in the MAC subheader.

[0216] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0217] Furthermore, any information in the above-described embodiments may be notified from the UE periodically, semi-persistently, or aperiodically.

[0218] [Application of Each Embodiment] At least one of the above-described embodiments may be applied when a specific condition is met. The specific condition may be defined in a standard or may be notified to a UE / BS using higher layer signaling / physical layer signaling.

[0219] At least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.

[0220] The specific UE capability may indicate at least one of the following: - Supporting specific processing / operation / control / information for at least one of the above embodiments; - Supporting CSI reporting for RSs of multiple frequencies; - Supporting CSI reporting for RSs of multiple cells; - Supporting CSI reporting including both L1-RSRP and L1-SINR; - Supporting index re-creation; - Supporting CSI reporting for candidate cells; - Supporting cases A / B / C / D / E; - The maximum number of RSs of the serving cell that can be reported (in one CSI report); - The maximum number of RSs of the candidate cell that can be reported (in one CSI report).

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

[0222] Furthermore, the specific UE capability may be a capability that is applied to all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (e.g., Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0223] Furthermore, at least one of the above-described embodiments may be applied when the UE configures / activates / triggers specific information related to the above-described embodiments (or performs the operations of the above-described embodiments) through higher layer signaling / physical layer signaling. For example, the specific information may be the above-described X / Y / Z / X ｓ / X ｃ The information may be information indicating the RRC parameter for a specific release (e.g., Rel. 18 / 19), or may be any RRC parameter for a specific release (e.g., Rel. 18 / 19).

[0224] If the UE does not support at least one of the specific UE capabilities or is not configured with the specific information, the UE may apply, for example, Rel. 15 / 16 behavior.

[0225] (Supplementary Notes) The following inventions are supplemented with respect to one embodiment of the present disclosure. [Supplementary Note 1] A terminal having: a controller that generates a Channel State Information (CSI) report including at least one field indicating a measurement result of a reference signal related to a serving cell; and a transmitter that transmits the CSI report. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein the controller selects one or more reference signals from the serving cell and a candidate cell, and selects a reference signal different from the one or more reference signals as a reference signal related to the serving cell. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the controller selects one or more reference signals from the serving cell and a candidate cell of the same frequency as the serving cell, and selects a reference signal different from the one or more reference signals as a reference signal related to the serving cell. [Supplementary Note 4] The terminal according to any of Supplementary Notes 1 to 3, wherein the controller arranges a field related to the serving cell before a field related to a candidate cell in the CSI report.

[0226] (Wireless Communication System) The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.

[0227] 18 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may be simply referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0228] The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0229] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0230] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

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

[0232] The 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).

[0233] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

[0234] 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.

[0235] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0236] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0237] The core network 30 may include network functions (Network Functions (NF)) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). A single network node may provide multiple functions. Communication with an external network (e.g., the Internet) may also be performed via the DN.

[0238] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0239] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the wireless communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0240] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0241] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0242] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), or the like may be used as an uplink channel.

[0243] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0244] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information for at least one of the PDSCH and the PUSCH.

[0245] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as a UL grant, a UL DCI, etc. Note that the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

[0246] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources for searching for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0247] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and the like in the present disclosure may be read interchangeably.

[0248] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0249] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0250] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0251] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as a reference signal.

[0252] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0253] 19 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0254] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0255] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0256] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0257] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0258] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, the RF unit 122, and a measurement unit 123.

[0259] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0260] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0261] The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0262] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0263] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0264] The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

[0265] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna 130.

[0266] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0267] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0268] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes that provide NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0269] The transmitter and receiver of the base station 10 in the present disclosure may be configured by at least one of the transmitter / receiver 120, the transmitter / receiver antenna 130, and the transmission path interface 140.

[0270] The transceiver 120 may transmit to the user terminal 20 configuration information for generating a Channel State Information (CSI) report including at least one field indicating a measurement result (e.g., L1-RSRP / SINR) of a reference signal (RS) related to the serving cell. The configuration information may be CSI report configuration information or the above-mentioned X / Y / Z / X ｓ / X ｃ The transmitting / receiving unit 120 may receive the CSI report from the user terminal 20.

[0271] (User Terminal) Fig. 20 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0272] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0273] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on common understanding in the technical field to which the present disclosure relates.

[0274] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transceiver unit 220.

[0275] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0276] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0277] The transmitting / receiving antenna 230 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0278] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0279] The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0280] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0281] The transmitter / receiver unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0282] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and if not, it may not be necessary to perform DFT processing as the transmission processing.

[0283] The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

[0284] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

[0285] The transceiver unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0286] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0287] The measurement unit 223 may derive channel measurements for CSI calculation based on the channel measurement resources. The channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on the interference measurement resources. The interference measurement resources may be at least one of an NZP CSI-RS resource for interference measurement, a CSI-Interference Measurement (IM) resource, etc. Note that CSI-IM may be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. Note that in the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeably read as interchangeable.

[0288] The transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.

[0289] The control unit 210 may generate a Channel State Information (CSI) report including at least one field indicating a measurement result of a reference signal related to the serving cell. The transceiver unit 220 may transmit the CSI report.

[0290] The control unit 210 may select one or more reference signals from the serving cell and the candidate cell, and may select a reference signal different from the one or more reference signals as a reference signal for the serving cell (see, for example, the above-mentioned embodiment 1.1 / 1.2).

[0291] The control unit 210 may select one or more reference signals from the serving cell and candidate cells that have the same frequency as the serving cell, and may select a reference signal different from the one or more reference signals as a reference signal for the serving cell (see, for example, the above-mentioned embodiment 1.1' / 1.2').

[0292] The control unit 210 may place the field related to the serving cell before the field related to the candidate cell in the CSI report (see, for example, the third embodiment described above).

[0293] (Hardware Configuration) Note that the block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0294] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As described above, the implementation method of each is not particularly limited.

[0295] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 21 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0296] In the present disclosure, the terms apparatus, circuit, device, section, unit, etc. may be used interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0297] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0298] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0299] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001.

[0300] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be implemented in a similar manner.

[0301] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory, etc. The memory 1002 may store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0302] Storage 1003 is a computer-readable recording medium and may be composed of at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a 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.

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

[0304] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0305] Furthermore, each device, such as the processor 1001 and the memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

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

[0307] (Modifications) Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0308] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0309] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by a transceiver in the frequency domain, and specific windowing performed by a transceiver in the time domain.

[0310] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology.

[0311] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0312] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be interchangeable.

[0313] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0314] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0315] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0316] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0317] A TTI having a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0318] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0319] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0320] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI, each of which may be composed of one or more resource blocks.

[0321] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0322] 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.

[0323] A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0324] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0325] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0326] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0327] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0328] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0329] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0330] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes.

[0331] Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0332] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0333] Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0334] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0335] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0336] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0337] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), these wired and / or wireless technologies are included within the definition of transmission media.

[0338] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0339] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "layer," "number of layers," "rank," "resource," "resource set," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," "UE panel," "transmitting entity," "receiving entity," etc. may be used interchangeably.

[0340] In the present disclosure, the term "antenna port" may be interchangeably read as an antenna port for any signal / channel (e.g., a demodulation reference signal (DMRS) port). In the present disclosure, the term "resource" may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource, an SRS resource, etc.). The resource may include time / frequency / code / space / power resources. Furthermore, the spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0341] The group may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, and the like.

[0342] In addition, in the present disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable terms.

[0343] In addition, in the present disclosure, the terms TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0344] Furthermore, in the present disclosure, terms such as "QCL," "QCL assumption," "QCL relationship," "QCL type information," "QCL property / properties," "specific QCL type (e.g., Type A, Type D) property," and "specific QCL type (e.g., Type A, Type D)" may be interchangeable.

[0345] In the present disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interchangeable. In the present disclosure, terms such as sequence, list, set, group, cluster, and subset may be interchangeable.

[0346] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. The "spatial relationship information (TCI state)" may be interchangeable with "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. The TCI state and the TCI may be interchangeable. The spatial relationship information and the spatial relationship may be interchangeable.

[0347] In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0348] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0349] In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information.

[0350] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0351] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0352] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

[0353] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0354] The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0355] 22 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0356] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0357] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0358] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0359] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0360] The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0361] The driving assistance system unit 64 includes various devices for providing functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0362] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 to and from the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, which are provided in the vehicle 40.

[0363] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Furthermore, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (or may function as at least one of the base station 10 and the user terminal 20).

[0364] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0365] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0366] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0367] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as an uplink channel and a downlink channel may be read as a sidelink channel.

[0368] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0369] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0370] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0371] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802. The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0372] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0373] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0374] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, etc.

[0375] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0376] Furthermore, "determination" may be considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "determining" some kind of action. In the present disclosure, "determination" may be read interchangeably with the above-mentioned actions.

[0377] Furthermore, in this disclosure, "determine / determining" may be interchangeably read as "assume / assuming," "expect / expecting," "consider / considering," etc. Furthermore, in this disclosure, "does not expect to do..." may be interchangeably read as "assumes not to do...."

[0378] In the present disclosure, "expect" may be interchangeably read as "be expected." For example, "expect(s) ..." ("..." may be expressed, for example, as a that clause, a to-infinitive, etc.) may be interchangeably read as "be expected ...." "does not expect ..." may be interchangeably read as "be not expected ...." Furthermore, "An apparatus A is not expected ..." may be interchangeably read as "an apparatus B other than apparatus A does not expect ... from apparatus A" (e.g., if apparatus A is a UE, apparatus B may be a base station).

[0379] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0380] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0381] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0382] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0383] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0384] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0385] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with "i-th" (i is an arbitrary integer) attached (for example, "highest" may be interchangeable with "i-th highest").

[0386] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0387] In the present disclosure, terms such as "when A, B," "if A, (then) B," "B upon A," "B in response to A," "B based on A," "B during / while A," "B before A," "B at (the same time as) / on A," "B after A," "B since A," and "B until A" may be interchangeable. Note that A, B, and the like herein may be replaced with appropriate expressions such as nouns, gerunds, and regular sentences, depending on the context. Note that the time difference between A and B may be approximately zero (immediately after or immediately before). A time offset may also be applied to the time at which A occurs. For example, "A" may be interchangeable with "before / after a time offset at which A occurs." The time offset (eg, one or more symbols / slots) may be predefined or may be specified by the UE based on signaled information.

[0388] In the present disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc. may be read interchangeably.

[0389] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The description of the present disclosure is for illustrative purposes only and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. A receiver for receiving radio resource control (RRC) signaling, which is configured to include in one channel status information (CSI) report a report on the reference signal (RS) of the current special cell (SpCell) and a report on the RS of one or more candidate cells, The system includes a control unit that generates the one CSI report, which includes a report on the current SpCell's RS and a report on the RS of one or more candidate cells, The aforementioned SpCell is a terminal that is either a primary cell (PCell) or a primary secondary cell (PSCell).

2. The terminal according to claim 1, further comprising a transmitting unit that transmits capability information indicating support for including in one CSI report a report on the current SpCell's RS and a report on the RS of one or more candidate cells.

3. The steps of receiving a radio resource control (RRC) signaling configured to include in one channel status information (CSI) report a report on the reference signal (RS) of the current special cell (SpCell) and a report on the RS of one or more candidate cells, The step of generating one CSI report, which includes a report on the current SpCell's RS and a report on the RS of one or more candidate cells, The aforementioned SpCell is a primary cell (PCell) or a primary secondary cell (PSCell) in a wireless communication method for terminals.

4. A transmitter that transmits radio resource control (RRC) signaling configured to include in one channel status information (CSI) report a report on the reference signal (RS) of the current special cell (SpCell) and a report on the RS of one or more candidate cells, The system includes a control unit that controls the reception of the single CSI report, which includes a report on the current SpCell's RS and a report on the RS of one or more candidate cells. The aforementioned SpCell is a base station, which is either a primary cell (PCell) or a primary secondary cell (PSCell).

5. A system having a terminal and a base station, The aforementioned terminal is A receiver that receives radio resource control (RRC) signaling configured to include a report on the reference signal (RS) of the current special cell (SpCell) and a report on the RS of one or more candidate cells in a single channel status information (CSI) report, The system includes a control unit that generates the one CSI report, which includes a report on the current SpCell's RS and a report on the RS of one or more candidate cells, The aforementioned current SpCell is either a primary cell (PCell) or a primary secondary cell (PSCell), The aforementioned base station is A system having a transmitting unit that transmits the RRC signaling.