Terminal, wireless communication method, base station and system

Abstract

A terminal according to one aspect of the present disclosure is characterized by comprising: a reception unit that receives a single channel state information (CSI) report setting which includes both a setting of a serving cell reference signal and a setting of a non-serving cell reference signal; and a control unit that controls, on the basis of the single CSI report setting, transmission of a CSI report containing information indicative of the serving cell or the non-serving cell. According to one aspect of the present disclosure, it is possible to provide an appropriate CSI report on a non-serving cell.

Description

[Technical field]

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

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of achieving higher data rates and lower latency (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of achieving higher capacity and greater sophistication of LTE (Third Generation Partnership Project (3GPP) 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] In existing LTE systems (e.g., 3GPP Rel. 8-14), a user equipment (User Equipment (UE)) transmits uplink control information (Uplink Control Information (UCI)) using at least one of an UL data channel (e.g., a Physical Uplink Shared Channel (PUSCH)) and an UL control channel (e.g., a Physical Uplink Control Channel (PUCCH)). [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention [Problem to be solved by the invention]

[0006] In future wireless communication systems, layer 1 / layer 2 (L1 / L2) inter-cell mobility is being considered to facilitate more efficient (realizing lower latency and overhead) DL / UL beam management.

[0007] In L1 / L2 inter-cell mobility, it is possible to change the serving cell using functions such as beam control without reconfiguring Radio Resource Control (RRC). In other words, it is possible to transmit and receive data to and from a non-serving cell without handover. Since handover requires RRC reconnection and creates a period during which data communication is not possible, L1 / L2 inter-cell mobility that does not require handover is preferable.

[0008] However, in the previous NR specifications, CSI reporting for reference signals of non-serving cells has not been sufficiently considered. Therefore, there is a risk that appropriate CSI reporting for non-serving cells cannot be performed.

[0009] Therefore, an object of the present disclosure is to provide a terminal, a wireless communication method, and a base station that are capable of performing appropriate CSI reporting for non-serving cells. [Means for solving the problem]

[0010] A terminal according to one aspect of the present disclosure is a serving cell SS / PBCH Block (SSB) Settings and non-serving cells SSB Both the settings and Corresponding to 1 Channel State Information (CSI) resource A receiver for receiving the setting; C A control unit that controls the transmission of SI reports; An index indicating a non-serving cell corresponding to the CSI resource configuration is set, and the index uses fewer information bits than a physical cell identity (PCI). It is characterized by: Effect of the Invention

[0011] According to one aspect of the present disclosure, appropriate CSI reporting can be performed for non-serving cells. [Brief description of the drawings]

[0012] [Figure 1] 1A-1D are diagrams illustrating an example of a multi-TRP scenario. [Diagram 2] 2A and 2B are diagrams showing an example of an intra-cell TRP and an example of an inter-TRP, respectively. [Diagram 3] FIG. 3 is a diagram showing an overview of the CSI reporting configuration of the RRC. [Figure 4] 4A is a diagram showing a part of a CSI resource configuration for RRC, and FIG 4B is a diagram showing a part of a CSI-SSB resource set. [Diagram 5] FIG. 5 is a diagram showing a first example of a CSI-SSB-ResourceSet. [Figure 6] FIG. 6 is a diagram showing a second example of a CSI-SSB-ResourceSet. [Figure 7] FIG. 7 is a diagram showing an example of CSI reporting when example 1-1 and example 1-2 are applied. [Figure 8] FIG. 8 is a diagram illustrating an example of CSI reporting when aspects 1-3 are applied. [Figure 9] FIG. 9 is a diagram showing an example of CSI reports ordered according to the strength of L1-RSRP / L1-SINR. [Figure 10]FIG. 10 is a diagram showing an example of CSI reporting in which serving cell / non-serving cell is taken into consideration for ordering. [Figure 11] FIG. 11 shows an example of CSI reporting for aspects 1-4. [Figure 12] FIG. 12 is a diagram showing an example of CSI reporting for option 1 in aspect 3-1. [Figure 13] FIG. 13 is a diagram showing a first example of CSI reporting for option 2 in aspect 3-1. [Figure 14] FIG. 14 is a diagram showing a second example of CSI reporting for option 2 in aspect 3-1. [Figure 15] FIG. 15 is a diagram showing an example of CSI reporting for option 3 in aspect 3-1. [Figure 16] FIG. 16 is a diagram showing a variation of CSI reporting in option 1 of aspect 3-1. [Figure 17] FIG. 17 is a diagram showing a variation of CSI reporting in option 2 of aspect 3-1. [Figure 18] FIG. 18 is a diagram illustrating an example of CSI reporting in option 1 of the fourth embodiment. [Figure 19] FIG. 19 is a diagram illustrating an example of CSI reporting for option 2 and option 3 of the fourth embodiment. [Figure 20] FIG. 20 is a diagram illustrating an example of CSI reporting in option 1 of the fifth embodiment. [Figure 21] FIG. 21 is a diagram illustrating a first example of CSI reporting for option 2 and option 3 of the fifth embodiment. [Figure 22] FIG. 22 is a diagram illustrating a second example of CSI reporting for option 2 and option 3 of the fifth embodiment. [Figure 23] FIG. 23 is a diagram illustrating a third example of CSI reporting for option 2 and option 3 of the fifth embodiment. [Figure 24] FIG. 24 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Diagram 25] FIG. 25 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 26] FIG. 26 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 27] FIG. 27 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] (CSI report) In NR, a UE measures a channel state using a predetermined reference signal (or a resource for the reference signal) and feeds back (reports) channel state information (CSI) to a base station.

[0014] 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.

[0015] The CSI-RS resources 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 that includes a synchronization signal (e.g., a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS)) and a PBCH (and corresponding DMRS), and may be referred to as an SS block (SSB), etc. An SSB index may be given to the time location of the SSB within the half frame.

[0016] In addition, the CSI may include at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), a SS / PBCH block resource indicator (SSBRI), a layer indicator (LI), a rank indicator (RI), a Layer 1 (L1)-Reference Signal Received Power (RSRP), an L1-Reference Signal Received Quality (RSRQ), an L1-Signal to Interference plus Noise Ratio (SINR), an L1-Signal to Noise Ratio (SNR), and the like.

[0017] The CSI may have multiple parts. The first part of the CSI (CSI Part 1) may include information with a relatively small number of bits (e.g., RI). The 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.

[0018] Methods of CSI feedback under consideration include (1) periodic CSI (Periodic CSI: P-CSI) reporting, (2) aperiodic CSI (A(AP)-CSI) reporting, and (3) semi-persistent CSI (Semi-Persistent CSI: SP-CSI) reporting.

[0019] The UE may be notified of information related to CSI reporting (which may be called CSI reporting configuration information) using higher layer signaling, physical layer signaling (e.g., Downlink Control Information (DCI)), or a combination of these. The CSI reporting configuration information may be configured, for example, using the RRC information element "CSI-ReportConfig."

[0020] Here, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like, or a combination of these.

[0021] The MAC signaling may be, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (MAC PDU), etc. The 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.

[0022] The CSI reporting configuration information may include, for example, information on a reporting period, an offset, and the like, which may be expressed in a predetermined time unit (slot unit, subframe unit, symbol unit, and the like). The CSI reporting configuration information may include a configuration ID (CSI-ReportConfigId). The configuration ID may specify parameters such as the type of CSI reporting method (e.g., whether or not it is SP-CSI) and the reporting period. The CSI reporting configuration information may include information (CSI-ResourceConfigId) indicating which signal (or which signal resource) is used to report the measured CSI.

[0023] (Beam Management) Up until now, methods of Beam Management (BM) have been considered for Rel-15 NR. In this beam management, beam selection based on the L1-RSRP reported by the UE is considered. Changing (switching) the beam of a certain signal / channel may be equivalent to changing the (Transmission Configuration Indication state) of the signal / channel.

[0024] The beam selected by the beam selection may be a transmission beam (Tx beam) or a reception beam (Rx beam). Also, the beam selected by the beam selection may be a beam of the UE or a beam of the base station.

[0025] The UE may report (transmit) measurement results for beam management using the PUCCH or PUSCH. The measurement results may be CSI including at least one of L1-RSRP, L1-RSRQ, L1-SINR, L1-SNR, etc. The measurement results may also be called beam measurements, beam measurement results, beam reports, beam measurement reports, etc.

[0026] The CSI measurement for the beam report may include interference measurement. The UE may measure channel quality, interference, etc., using the resource for CSI measurement to derive the beam report. The resource for CSI measurement may be, for example, at least one of a resource of an SS / PBCH block, a resource of a CSI-RS, and other reference signal resources. Configuration information for the CSI measurement report may be configured in the UE using higher layer signaling.

[0027] The beam report may include at least one of a channel quality measurement and an interference measurement. The channel quality measurement may include, for example, L1-RSRP. The interference measurement may include, for example, L1-SINR, L1-SNR, L1-RSRQ, or other interference-related metric (e.g., any metric other than L1-RSRP).

[0028] In addition, the resource for CSI measurement for beam management may be called a beam measurement resource. Furthermore, the signal / channel for which the CSI is measured may be called a beam measurement signal. Furthermore, the CSI measurement / report may be interpreted as at least one of a measurement / report for beam management, a beam measurement / report, a radio link quality measurement / report, and the like.

[0029] The CSI reporting configuration information that takes into account the current NR beam management is included in the RRC information element "CSI-ReportConfig." The information in the RRC information element "CSI-ReportConfig" is explained below.

[0030] The CSI reporting configuration information (CSI-ReportConfig) may include report quantity information ("report quantity", which may be expressed as the RRC parameter "reportQuantity"), which is information on parameters to be reported. The report quantity information is defined as an ASN.1 object type called "choice". For this reason, one of the parameters (cri-RSRP, ssb-Index-RSRP, etc.) defined as the report quantity information is set.

[0031] A UE in which an upper layer parameter included in the CSI reporting configuration information (e.g., the RRC parameter "groupBasedBeamReporting") is set to enabled may include multiple beam measurement resource IDs (e.g., SSBRI, CRI) and multiple corresponding measurement results (e.g., L1-RSRP) in the beam report for each reporting configuration.

[0032] A UE in which one or more numbers of RS resources to be reported are configured by higher layer parameters (e.g., RRC parameter "nrofReportedRS") included in the CSI reporting configuration information may include in the beam report one or more beam measurement resource IDs and one or more corresponding measurement results (e.g., L1-RSRP) for each reporting configuration.

[0033] (TCI, spatial relations, QCL) In NR, it is considered to control 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).

[0034] The TCI state may represent a state that is applied to a downlink signal / channel. The equivalent of the TCI state that is applied to an uplink signal / channel may be expressed as a spatial relation.

[0035] The TCI state is information on the Quasi-Co-Location (QCL) of signals / channels, and may be called spatial reception parameters, spatial relation information, etc. The TCI state may be configured in the UE for each channel or for each signal.

[0036] A QCL is an index that indicates the statistical properties of a signal / channel. For example, when a signal / channel and another signal / channel are in a QCL relationship, it may mean that it can be assumed that at least one of the following is the same (QCL with respect to at least one of the following) between these different signals / channels: Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter).

[0037] In addition, the spatial reception parameters may correspond to a reception beam (e.g., a reception analog beam) of the UE, and the beam may be specified based on a spatial QCL. A QCL (or at least one element of a QCL) in the present disclosure may be replaced with a spatial QCL (sQCL).

[0038] A plurality of types (QCL types) of QCL may be defined. For example, four QCL types AD may be provided, each having different parameters (or parameter sets) that can be assumed to be the same. The parameters (which may be called 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.

[0039] The UE's assumption that a given Control Resource Set (CORESET), channel, or reference signal is in a particular QCL (e.g., QCL type D) relationship with another CORESET, channel, or reference signal may be referred to as a QCL assumption.

[0040] 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 assumptions of the signal / channel.

[0041] The TCI state may be, for example, information about the QCL of 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 of these.

[0042] In the present disclosure, higher layer signaling may be, for example, any one or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like.

[0043] The MAC signaling may be, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The 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.

[0044] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0045] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0046] In addition, the RS that has a QCL relationship with the channel may be, for example, at least one of 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)), and a QCL detection reference signal (also called a QRS).

[0047] 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 be referred to as an SS / PBCH block.

[0048] An information element of the TCI state ("TCI-state IE" of RRC) set by higher layer signaling may include one or more pieces of QCL information ("QCL-Info"). The QCL information may include at least one of information on an RS having a QCL relationship (RS relationship information) and information indicating a QCL type (QCL type information). The RS relationship information may include information such as an index of the RS (e.g., an SSB index, a Non-Zero-Power (NZP) CSI-RS resource identifier), an index of a cell in which the RS is located, an index of a Bandwidth Part (BWP) in which the RS is located, etc.

[0049] In Rel.15 NR, both the QCL type A RS and the QCL type D RS, or only the QCL type A RS, can be configured for a UE as at least one TCI state of the PDCCH and the PDSCH.

[0050] When the TRS is configured as the RS of QCL type A, unlike the demodulation reference signal (DMRS) of the PDCCH or PDSCH, the same TRS is expected to be transmitted periodically over a long period of time. The UE can measure the TRS and calculate the average delay, delay spread, etc.

[0051] A UE in which the TRS is set as a QCL type A RS in the TCI state of the DMRS of PDCCH or PDSCH can assume that the parameters of the QCL type A of the DMRS of PDCCH or PDSCH and the parameters of the QCL type A of the TRS (average delay, delay spread, etc.) are the same, and can therefore obtain the parameters of the DMRS of PDCCH or PDSCH type A (average delay, delay spread, etc.) from the measurement result of the TRS. When performing channel estimation of at least one of the PDCCH and the PDSCH, the UE can perform more accurate channel estimation by using the measurement result of the TRS.

[0052] A UE configured with a QCL type D RS can determine a UE receive beam (spatial domain receive filter, UE spatial domain receive filter) using the QCL type D RS.

[0053] 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 (its DMRS), and this RS may be called a QCL source of QCL type X in the TCI state.

[0054] (Multi-TRP) In NR, one or more transmission / reception points (TRPs) (multi-TRPs) are considered to perform DL transmission to a UE using one or more panels (multi-panels). Also, it is considered that a UE performs UL transmission to one or more TRPs.

[0055] Note that multiple TRPs may correspond to the same cell identifier (cell identifier (ID)) or different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0056] 1A-1D are diagrams illustrating an example of a multi-TRP scenario, assuming, but not limited to, that each TRP is capable of transmitting four different beams.

[0057] 1A shows an example of a case where only one TRP (TRP1 in this example) of the multiple TRPs transmits to the UE (may be called single mode, single TRP, etc.). In this case, TRP1 transmits both a control signal (PDCCH) and a data signal (PDSCH) to the UE.

[0058] 1B shows an example of a case where only one TRP (TRP1 in this example) of the multiple TRPs transmits a control signal to the UE, and the multiple TRPs transmit data signals (may be called a single master mode). The UE receives each PDSCH transmitted from the multiple TRPs based on one Downlink Control Information (DCI).

[0059] FIG. 1C shows an example of a case where each of the multiple TRPs transmits a part of the control signal to the UE, and the multiple TRPs transmit data signals (which may be called a master-slave mode). Part 1 of the control signal (DCI) may be transmitted in TRP1, and part 2 of the control signal (DCI) may be transmitted in TRP2. Part 2 of the control signal may depend on part 1. The UE receives each PDSCH transmitted from the multiple TRP based on these parts of DCI.

[0060] FIG. 1D shows an example of a case where each of the multiple TRPs transmits a separate control signal to the UE, and the multiple TRPs transmit data signals (which may be called a multi-master mode). A first control signal (DCI) may be transmitted from TRP1, and a second control signal (DCI) may be transmitted from TRP2. The UE receives each PDSCH transmitted from the multiple TRPs based on these DCIs.

[0061] When multiple PDSCHs from multiple TRPs as shown in FIG. 1B (may be called multiple PDSCHs) are scheduled using one DCI, the DCI may be called a single DCI (single PDCCH). Also, when multiple PDSCHs from multiple TRPs as shown in FIG. 1D are scheduled using multiple DCIs, these multiple DCIs may be called multiple DCIs (multiple PDCCHs).

[0062] Each TRP of the multi-TRP may transmit a different code word (CW) and a different layer. As one form of multi-TRP transmission, non-coherent joint transmission (NCJT) is being considered.

[0063] In the NCJT, for example, TRP1 performs modulation mapping and layer mapping on a first codeword to transmit a first PDSCH using a first number of layers (e.g., two layers) with a first precoding, and TRP2 performs modulation mapping and layer mapping on a second codeword to transmit a second PDSCH using a second number of layers (e.g., two layers) with a second precoding.

[0064] In addition, multiple PDSCHs (multi-PDSCHs) that are NCJTed may be defined as partially or completely overlapping with respect to at least one of the time and frequency domains. That is, the first PDSCH from the first TRP and the second PDSCH from the second TRP may overlap with at least one of the time and frequency resources.

[0065] The first PDSCH and the second PDSCH may be assumed to be not quasi-co-located (QCL). Reception of multiple PDSCHs may be interpreted as simultaneous reception of PDSCHs that are not of a predetermined QCL type (e.g., QCL type D).

[0066] In URLLC for multiple TRPs, it is considered that PDSCH (transport block (TB) or codeword (CW)) repetition across multiple TRPs is supported. It is considered that repetition schemes (URLLC schemes, for example, schemes 1, 2a, 2b, 3, and 4) across multiple TRPs in the frequency domain, layer (spatial) domain, or time domain are supported. In scheme 1, multiple PDSCHs from multiple TRPs are space division multiplexed (SDM). In schemes 2a and 2b, PDSCHs from multiple TRPs are frequency division multiplexed (FDM). In scheme 2a, the redundancy version (RV) is the same for multiple TRPs. In scheme 2b, the RVs may be the same or different for multiple TRPs. In schemes 3 and 4, multiple PDSCHs from multiple TRPs are time division multiplexed (TDM). In scheme 3, multiple PDSCHs from multiple TRPs are transmitted in one slot. In scheme 4, multiple PDSCHs from multiple TRPs are transmitted in different slots.

[0067] Such a multi-TRP scenario allows for more flexible transmission control using channels with better quality.

[0068] In the multi-master mode as shown in FIG. 1D, configurations are possible in which the same physical cell ID is set for multiple TRPs (intra-TRP mobility, intra-cell TRP mobility, intra-cell mobility, or intra-cell multi-TRP operation), and configurations are possible in which different physical cell IDs are set for multiple TRPs (inter-TRP mobility, inter-cell TRP mobility, inter-cell mobility, or inter-cell multi-TRP operation).

[0069] Figure 2A is a diagram showing an example of intra-cell mobility. As shown in Figure 2A, the same physical cell ID (PCI1) is set for TRP1 and TRP2. In this case, the SSB (SSB index) transmitted by TRP1 and the SSB transmitted by TRP2 must be different. In the example of Figure 2A, the SSB of TRP1 is 0-31, and the SSB of TRP2 is 32-63.

[0070] FIG. 2B is a diagram showing an example of inter-cell mobility. As shown in FIG. 2B, different physical cell IDs (PCI1, PCI2) are set for TRP1 and TRP2. In this case, the SSB transmitted by TRP1 and the SSB transmitted by TRP2 may overlap or may be different. In the example of FIG. 2B, the SSBs of TRP1 and TRP2 may both be 0-63. Or, the SSB of TRP1 may be 0-31, and the SSB of TRP2 may be 32-63. In this case, the RS of the TCI state of PDSCH1 / PDSCH2 is PCI1 or PCI2.

[0071] (RRC CSI reporting configuration and CSI resource configuration) Fig. 3 is a diagram showing an overview of the CSI reporting configuration of RRC. Fig. 3 shows the CSI reporting configuration of RRC of 3GPP Rel.15 / 16. As shown in Fig. 3, the CSI reporting configuration (CSI-ReportConfig) includes "resourcesForChannelMeasurement", "csi-IM-resourcesForInterference", "nzp-CSI-RS-resourcesForInterference", "Report quantity", etc. "resourcesForChannelMeasurement", "csi-IM-resourcesForInterference", and "nzp-CSI-RS-resourcesForInterference" correspond to the CSI resource configuration "CSI-ResourceConfig" (CSI-ResourceConfigId).

[0072] Fig. 4A is a diagram showing a part of the CSI resource configuration of RRC. Fig. 4B is a diagram showing a part of the CSI-SSB resource set. Figs. 4A and 4B show the RRC configuration of 3GPP Rel.15 / 16. As shown in Fig. 4A, the CSI resource configuration (CSI-ResourceConfig) includes "CSI-SSB-ResourceSetId". As shown in Fig. 4B, the CSI-SSB-resource set (CSI-SSB-ResourceSet) includes "CSI-SSB-ResourceSetId" and "SSB-Index".

[0073] (RS configuration for serving cell / non-serving cell) Regarding L1 (Layer 1) CSI reporting by an RS (e.g., SSB) of a non-serving cell and the relationship between L1 CSI reporting in a serving cell and L1 CSI reporting in a non-serving cell, for example, the following first and second examples may be applied.

[0074] <First example> Separate channel state information (CSI) reporting configurations (CSI-ReportConfig) may be configured for the RS of the serving cell and the RS of the non-serving cells. For example, the RS may be a synchronization signal block (SSB) if the SSB is configured for L1 CSI reporting in the CSI-ReportConfig. A CSI resource configuration (CSI-ResourceConfig) may be configured with the RS (SSB) from only the serving cell or the RS (SSB) from only the non-serving cell. The CSI resource configuration may be configured with the NZP-CSI-RS resource configuration.

[0075] In the present disclosure, the CSI reporting configuration (CSI-ReportConfig), the CSI resource configuration (CSI-ResourceConfig), and the CSI-SSB resource set (CSI-SSB-ResourceSet) may be read as interchangeable.

[0076] By using different CSI reporting configurations, it is possible to distinguish between the SSB of the serving cell and the SSB of the non-serving cell. For example, when a specific SSBC=1 (#1) is configured, the SSB#1 of the serving cell is different from the SSB#1 of the non-serving cell. In such a case, the UE can distinguish between the SSB of the serving cell and the SSB of the non-serving cell.

[0077] Fig. 5 is a diagram showing a first example of a CSI-SSB-ResourceSet. As shown in Fig. 5, as an RRC parameter, "newID" (recreated index of non-serving cell) or "physCellId" may be configured in the CSI-SSB-ResourceSet to indicate that all SSBs in the CSI-SSB-ResourceSet are SSBs from non-serving cells. "newID" may correspond to the ID of the TRP. Configurations related to measurement of SSBs of different non-serving cells may be configured in different CSI-SSB-ResourceSet / CSI-ResourceConfig.

[0078] For example, when "newID" indicates a serving cell and one non-serving cell, one bit is used. When "newID" indicates a serving cell, non-serving cell #1, non-serving cell #2, and non-serving cell #3, two bits are used. Furthermore, "newID" may use more bits depending on the number of supported non-serving cells.

[0079] The advantages of configuring the "newID" compared to directly configuring the "physCellId" (PCI) are described below. When the PCI is directly configured in the QCL / TCI state, the RRC overhead is large. The number of bits in the RRC signaling for one PCI is 10 bits. If there are 64 TCI state configurations from non-serving cells, 640 bits are used. Furthermore, when configuring the SSB of a non-serving cell in the L1 CSI report, 10 bits are used for each channel measurement resource (CMR) of the SSB of the non-serving cell. That is, the total overhead is not small. On the other hand, when using the "newID" and there is only one non-serving cell, only one bit is used to indicate the non-serving cell. Therefore, the signaling overhead can be suppressed. The relationship between the "newID" and the "physCellId" may be specified in the configuration / specification.

[0080] <Second example> The RS of the serving cell (e.g., SSB) and the RS of the non-serving cell (e.g., SSB) may be configured in the same CSI reporting configuration (CSI-ReportConfig) and the same CSI resource configuration (CSI-ResourceConfig), i.e., both the RS of the serving cell and the RS of the non-serving cell may be included in one CSI reporting configuration and one CSI resource configuration.

[0081] 6 is a diagram showing a second example of a CSI-SSB-ResourceSet. As a higher layer (RRC) parameter received by a UE, a csi-SSB-ResourceList of the CSI-SSB-ResourceSet may include an SSB-Index from a serving cell or an SSB-Index from a non-serving cell.

[0082] For each SSB index, a "new ID" (recreated index of non-serving cells) or PCI (PCI used directly) may be added, or a bitmap-like sequence ("newIDsequence") indicating the "new ID" may be added, with each bit (position of the bit in the sequence) being one-to-one mapped to each of the SSBs (position of the SSB index in the csi-SSB-ResourceList).

[0083] Or, the SSBs from different cells as different CMR groups may be added in a specific order, or the SSB-index from the serving cell or the SSB-index from the non-serving cell may be set according to other formats.

[0084] The first CMR group in the csi-SSB-ResourceList may represent serving cells, and the remaining CMRs may represent non-serving cells. For example, the first X CMRs (or the first group (CMR group) with a new ID / PCI) may represent serving cells, the next Y CMRs (or the second group (CMR group) with a new ID / PCI) may represent non-serving cell #i, and the next Z CMRs (or the third group (CMR group) with a new ID / PCI) may represent non-serving cell #j.

[0085] In Fig. 6, for example, when SSB index = (1, 5, 8, 30) and a bitmap-like sequence indicating new ID ("newIDsequence") = (0, 1, 0, 1) are set, it may indicate SSB#1 of the serving cell, SSB#5 of the non-serving cell, SSB#8 of the serving cell, and SSB#30 of the non-serving cell. That is, new ID = 0 may indicate the serving cell, and new ID = 1 may indicate the non-serving cell.

[0086] Also, multiple combinations of one csi-SSB-Resource (one SSB index in the csi-SSB-ResourceList) and one new ID / PCI (one new ID / PCI in the newIDsequence) may be set. For example, instead of the csi-SSB-ResourceList (1, 5, 8, 30) and newIDsequence (0, 1, 0, 1) in the example of Fig. 9, a list (sequence) of combinations of (1, 0), (5, 1), (8, 0), (30, 1) may be set.

[0087] In RRC signaling, since the CSI-SSB-ResourceSet includes the SSB from a cell (e.g., as in the first example), the SSBs of multiple cells may be configured in multiple CSI-SSB-ResourceSets and included in the CSI-ReportConfig (even in the case of periodic (P) CSI reporting / Semi-Persistent (SP) CSI reporting).

[0088] In future wireless communication systems (e.g., NR), L1 / L2 inter-cell mobility is being considered to facilitate more efficient (realizing lower latency and overhead) DL / UL beam management.

[0089] In L1 / L2 inter-cell mobility, it is possible to change the serving cell using functions such as beam control without resetting the RRC. In other words, it is possible to transmit and receive data to and from a non-serving cell without handover. Since handover requires RRC reconnection and creates a period when data communication is not possible, L1 / L2 inter-cell mobility that does not require handover is preferable.

[0090] However, in the conventional NR specifications, CSI reporting for reference signals of non-serving cells has not been fully considered. Therefore, there is a risk that appropriate CSI reporting for non-serving cells cannot be performed. Therefore, the present inventors have conceived of a terminal that can perform appropriate CSI reporting for non-serving cells.

[0091] 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.

[0092] In the present disclosure, a CSI report and a beam report may be interchangeable. A report and a measurement may be interchangeable.

[0093] In addition, in the present disclosure, panel, Uplink (UL) transmitting entity, TRP, TRP-ID, TRP ID, spatial relationship, control resource set (CONTROLL RESOURCE SET (CORESET)), PDSCH, codeword, base station, specific antenna port (e.g., DeModulation Reference Signal (DMRS) port), specific antenna port group (e.g., DMRS port group), specific group (e.g., Code Division Multiplexing (CDM) group, specific reference signal group, CORESET group), CORESET pool, may be read as interchangeable. Also, panel identifier (ID) and panel may be read as interchangeable.

[0094] In the present disclosure, cell, CC, carrier, BWP, and band may be read as interchangeable.

[0095] In the present disclosure, the terms index, ID, indicator, and resource ID may be interchangeable.

[0096] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The wireless communication methods according to the embodiments may be applied alone or in combination. In the present disclosure, "A / B" may be read as "at least one of A and B."

[0097] In the present disclosure, a CSI report configuration (CSI-ReportConfig) and a CSI report setting (CSI report setting) may be read as mutually interchangeable. A CSI resource configuration (CSI-ResourceConfig) and a CSI resource setting (CSI resource setting) may be read as mutually interchangeable.

[0098] In the present disclosure, RS, beam, measurement result, and RS setting may be interchangeable. RS may mean at least one of CRI and SSBRI in CSI report. L1-RSRP and L1-SINR may be interchangeable. SSB, SSB index, and SSBRI may be interchangeable. Group, CMR group, DMRS group, and beam pair may be interchangeable.

[0099] (Wireless communication method) <Problem 1> For example, when the configuration of the serving cell RS (e.g., SSB) and the configuration of the non-serving cell RS (e.g., SSB) are configured in the same CSI reporting configuration / CSI resource configuration, or when separate CSI reporting configurations are configured for the serving cell RS and the non-serving cell RS, it is not clear how to distinguish whether the beam index (SSB index) included in the CSI report is for the serving cell or the non-serving cell.

[0100] <First embodiment> When the UE receives the same (one) CSI reporting configuration / CSI resource configuration including both the configuration of the RS (e.g., SSB) of the serving cell and the configuration of the RS (e.g., SSB) of the non-serving cell, the UE may control the transmission (report) of a CSI report including information (e.g., indicator) indicating the serving cell / non-serving cell in addition to the conventional report content. The information is information indicating the association between the reference signal / measurement result and the serving cell or the non-serving cell, and is, for example, the indicator shown in aspects 1-1 and 1-2, the extended beam index shown in aspect 1-3, or the like. The report content may be, for example, at least one of the SSB index, CRI, L1-RSRP, L1-SINR, L1-SNR, LI, RI, PMI, and CQI. As a method of setting this information, the examples shown in the following aspects may be applied.

[0101] [Aspect 1-1] A one-bit indicator of serving / non-serving cell may be applied. For example, "0" may indicate a serving cell and "1" may indicate a non-serving cell. Also, "1" may indicate a serving cell and "0" may indicate a non-serving cell.

[0102] [Aspect 1-2] As information indicating a serving cell / non-serving cell, a new ID (e.g., a re-indexed index indicating a non-serving cell, a group ID of a CMR) or a PCI (PCI used directly) may be applied. This new ID may depend on RS configuration signaling (CSI reporting configuration / CSI resource configuration). This new ID may, for example, be "0" indicating a serving cell, "1" indicating a non-serving cell #1, and "2" indicating a non-serving cell #2. That is, this new ID may indicate either a serving cell or one or more non-serving cells.

[0103] The regenerated index indicating the non-serving cell may be associated with a portion of the PCI. Using the regenerated index instead of the PCI reduces the number of information bits and may reduce RRC signaling overhead. The regenerated index may be referred to as a regenerated index.

[0104] In the example 1-1 and the example 1-2, the UE may additionally report each beam index (both serving cell RS and non-serving cell RS), or the UE may additionally report only the RS corresponding to the non-serving cell.

[0105] Fig. 7 is a diagram showing an example of CSI reporting when example 1-1 and example 1-2 are applied. In Fig. 7, when example 1-1 is applied, a "1-bit indicator" indicating a serving cell / non-serving cell is used, and when example 1-2 is applied, a "new ID" indicating a serving cell / non-serving cell is used. As shown in Fig. 7, the "1-bit indicator" or the "new ID" corresponds to "CRI or SSBRI #X" (X=1 to N), respectively.

[0106] [Aspect 1-3] As information indicating a serving cell / non-serving cell, an extended beam index (RS index, SSB index, CSI-RS resource index, reporting beam index, reporting RS index) by a regenerated index of a non-serving cell RS may be applied. In this case, there may be no additional report content. In the present disclosure, SSB index and SSBRI may be read as interchangeable.

[0107] As the extended beam index, the non-serving cell RS may be re-indexed (re-numbered) according to the non-serving cell PCI / index / group ID (in that order), and then the non-serving cell RS may be renumbered according to the RS index (SSB index, CSI-RS resource index) (in that order). For example, from SSB index 0-63, SSB#0-63 for the serving cell and SSB#64-127 for the non-serving cell may be renumbered (and used for reporting) as the extended beam index.

[0108] For example, if two non-serving cell RSs are configured, SSBs #0, 4, and 5 are transmitted from non-serving cell #1, and SSBs #2, 4, 10, and 12 are transmitted from non-serving cell #2. Then, reported SSB indices #64, 65, and 66 may indicate SSBs #0, 4, and 5 corresponding to non-serving cell #1, and reported SSB indices #67, 68, 69, and 70 may indicate SSBs #2, 4, 10, and 12 corresponding to non-serving cell #2.

[0109] The non-serving cell SSB re-creation index may start from the maximum serving cell SSB number (e.g., 4, 8, 64). The non-serving cell SSB re-creation index may start following the maximum serving cell SSB index (e.g., if SSB#0, 1, 5, 8, 10 corresponding to the serving cell are configured, the reported non-serving cell SSB index starts from 11).

[0110] The non-serving cell SSB re-creation index may start following the maximum serving cell SSB re-creation index (e.g., if serving cell SSB#0,1,5,8,10 are configured, then serving cell SSB index#0,1,2,3,4 will be recreated and reported, so the reported non-serving cell SSB index will start from 5).

[0111] Fig. 8 is a diagram showing an example of CSI reporting when aspects 1-3 are applied. In Fig. 8, CRI or SSBRI "Extended CRI or SSBRI #X" (X = 1 to N) that is extended (with an increased number of bits) to support non-serving cell beam reporting is used. "RSRP / SINR #1" and "Differential RSRP / SINR #X" (X = 2 to N) are included as RSRP / SINR reports.

[0112] Each of the above aspects may apply only to SSB index reporting (and not to CRI reporting) or may apply to both SSB index reporting and CRI reporting.

[0113] In the current L1-RSRP reporting specification (Rel.15 / 16), the L1-RSRP value is defined as a 7-bit value in the range of [-140,-44] dBm (step size is 1 dB). When differential L1-RSRP is used, the maximum measured value of L1-RSRP is quantized to a 7-bit value in the range of [-140,-44] dBm (step size is 1 dB), and a 4-bit value is quantized as the differential L1-RSRP. The differential L1-RSRP is the difference between the measured value of L1-RSRP and the maximum value (strongest RSRP).

[0114] In addition, future specifications for L1-RSRP reports may be changed as follows (1-1) and (1-2).

[0115] (1-1) When the UE is configured with beam reporting of non-serving cells in addition to beam reporting of serving cells, the bit size per beam report may be maintained at the number of bits in the above current specification (7 bits / 4 bits), and the total number of bits may be X times the number of bits in the above current specification. X may vary depending on the number of non-serving cells supported (reported to be supported) by the UE or the number of non-serving cells configured in the UE.

[0116] (1-2) The number of bits in the above specification (7 bits of L1-RSRP, 4 bits of differential L1-RSRP) may be maintained. To support beam reporting of non-serving cells, 7 bits may be used to report the best (largest) L1-RSRP in both the serving and non-serving cells, and 4 bits may be used to report the differential L1-RSRP of each beam in both the serving and non-serving cells. This can reduce overhead, but may result in larger quantization errors due to supporting beam reporting of non-serving cells.

[0117] In the current specification, the number of beam report bits is defined to support a maximum of 64 SSBs, so if the number of SSBs is extended to support SSB indices from 0 to 127, the CRI / SSBRI specification may be updated. For example, the number of beam / resource index (CRI / SSBRI) bits may be increased to support beam reporting of non-serving cells. In that case, the following examples (2-1) and (2-2) may be considered as future L1-RSRP report specifications.

[0118] (2-1) The number of bits in the above specification (7-bit L1-RSRP, 4-bit differential L1-RSRP) may be maintained, which means that the total number of bits in the beam report increases to support non-serving cell beam reporting.

[0119] (2-2) When non-serving cell beam reporting is configured in the UE, the number of bits of the L1-RSRP value may be reduced. That is, fewer than 7 bits may be used for the L1-RSRP, and fewer than 4 bits may be used for the differential L1-RSRP. In this case, the total number of bits in the beam report is smaller than that in 2-1 above, so that overhead can be suppressed, but there is a risk of increased quantization error. The number of bits used may be specified in the specifications, or may be configured in the UE by higher layer signaling, etc.

[0120] When (1-1) and (2-2) are applied, the table defining the reported values ​​of L1-RSRP and differential L1-RSRP in the specifications may be updated.

[0121] [Rules for beam selection / ordering of CSI reports] For the beam selection / ordering rules for CSI reporting, either option 1 or option 2 below may be applied.

[0122] [[Option 1]] Similar to Rel.15 / 16, beam selection / ordering may be performed according to the strength of L1-RSRP / L1-SINR. FIG. 9 is a diagram showing an example of CSI reporting ordered according to the strength of L1-RSRP / L1-SINR. In option 1, similar to the example in FIG. 7, "1-bit indicator" or "new ID" corresponds to "CRI or SSBRI #X", respectively. However, it differs from the example in FIG. 7 in that (X=1 to 4). The RSRP / SINR report also includes "RSRP / SINR #1" and "Differential RSRP / SINR #X", but differs from the example in FIG. 7 in that (X=2 to 4). However, X may be greater than 4.

[0123] [[Option 2]] In beam selection / ordering, not only the strength of L1-RSRP / L1-SINR but also whether it corresponds to a serving cell / non-serving cell may be taken into consideration. For example, in order to report a selected good beam, the UE may place the report for the serving cell's RS first and the report for the non-serving cell RS next in the CSI report.

[0124] FIG. 10 is a diagram showing an example of CSI reporting in which serving cell / non-serving cell is considered for ordering. In FIG. 10, "CRI or SSBRI #1" and "CRI or SSBRI #2" correspond to serving cells (first 1-bit indicator or new ID), and "CRI or SSBRI #3" and "CRI or SSBRI #4" correspond to non-serving cells (second 1-bit indicator or new ID). Also, in FIG. 10, for example, RSRP / SINR #1 and Differential RSRP / SINR #2 correspond to serving cells, and RSRP / SINR #3 and Differential RSRP / SINR #4 correspond to non-serving cells. For example, 7 bits are used for RSRP / SINR #1 and RSRP / SINR #3 because they are maximum values, and 4 bits are used for Differential RSRP / SINR #2 and Differential RSRP / SINR #4 because they are difference values ​​from the maximum value.

[0125] Option 2 may be used when separate (different) beam numbers are configured for reporting serving / non-serving cells. For RSs from serving cells, the 1-bit indicator or new ID may be omitted. If there is only one non-serving cell, the 1-bit indicator or new ID of RSs from non-serving cells may also be omitted (corresponding to aspects 1-4 described below).

[0126] In case there are multiple non-serving cells, the UE may order the RSs of the non-serving cells according to at least one of the PCI, the regenerated index of the non-serving cells, and the CMR group ID.

[0127] As mentioned above, in Option 1, a 1-bit indicator or new ID is required for each reported beam. In Option 2, only one 1-bit indicator or new ID is required for one or more RSs corresponding to a serving cell (or a non-serving cell).

[0128] In option 2, the RSRP / SINR values ​​(7 bits) are reported for the first reported RS of the serving cell and non-serving cells. Then, the differential RSRP / SINR values ​​are reported for the remaining reported RSs of the serving cell or non-serving cells. In this case, the range of the 4-bit differential RSRP / SINR value may be constant among multiple cells (fields) or may be changed for each cell (field).

[0129] In option 2, the RSRP / SINR report may be split into two parts (serving cell RS and RSRP / SINR values ​​and non-serving cell RS and RSRP / SINR values), i.e. the second CSI part with non-serving cell RS and RSRP / SINR values ​​may be omitted / removed if the UCI payload is not transmittable (UCI payload size is larger than the size that can be transmitted by the UE or the coding rate of UCI is larger than the maximum coding rate) and indicated by the new RRC parameters.

[0130] [Aspect 1-4] The number of beams reported for a serving cell / non-serving cell may be specified in a specification or may be preset by RRC / MAC CE / DCI, etc. In CSI reporting, the order of beams may imply an indication of serving / non-serving cells. That is, the UE may determine the arrangement of reports corresponding to serving / non-serving cells in CSI reporting based on the number of beams reported for the serving / non-serving cells.

[0131] For example, if two beams are configured to be reported for a serving cell and a non-serving cell, respectively, the reports (CRI or CCBRI) of the first two beams in the CSI report correspond to the serving cell, and the reports (CRI or CCBRI) of the last two beams in the CSI report correspond to the non-serving cell.

[0132] Fig. 11 shows an example of CSI reporting in aspects 1 to 4. In the example shown in Fig. 11, "CRI or SSBRI #1" and "CRI or SSBRI #2" always correspond to serving cells, and "CRI or SSBRI #3" and "CRI or SSBRI #4" always correspond to non-serving cells. According to the example in Fig. 11, a new indicator is not required, so overhead can be suppressed.

[0133] Figure 11 is similar to Figure 10, except that the 1-bit indicator or new ID is omitted. That is, the L1-RSRP / SINR value of the first beam of the non-serving cell (RSRP / SINR #3) is quantized to 7 bits since it is the maximum value. Also, the differential value of the L1-RSRP / SINR of the other beams of the non-serving cell (Differential RSRP / SINR #4) is quantized to 4 bits as the differential value with respect to the first beam of the non-serving cell.

[0134] According to the present embodiment, it is possible to easily distinguish whether an RS in a CSI report is for a serving cell or a non-serving cell. Also, when there are multiple non-serving cells, it is possible to easily distinguish which non-serving cell an RS in a CSI report is for.

[0135] <Second embodiment> The following describes CSI reporting when separate CSI reporting configurations are set for the RS of a serving cell and the RS of a non-serving cell.

[0136] When the CSI reporting configuration (RS included in the CSI reporting configuration) corresponds to only one non-serving cell, the conventional (Rel.15 / 16) report content may be applied as is. When the CSI reporting configuration (RS included in the CSI reporting configuration) corresponds to multiple non-serving cells, the method of the first embodiment may be applied to indicate which non-serving cell the reported beam index is from.

[0137] According to the present embodiment, even if separate CSI reporting configurations are set for the RS of the serving cell and the RS of the non-serving cell, it is possible to obtain the same effects as those of the first embodiment.

[0138] <Third embodiment> An example will be described in which group-based beam reporting (CSI reporting) is applied and RSs (e.g., SSBs) of a serving cell and a non-serving cell are included in the same (one) CSI reporting configuration / CSI resource configuration having different CMR groups. In aspects 3-1 and 3-2, examples will be described in which two beams from different CMR groups are reported within one group (one beam pair).

[0139] [Aspect 3-1] The UE may report two beams reported in each group by distinguishing the cells of each beam in the same manner as in the first embodiment. For example, when one CSI reporting configuration / CSI resource configuration has different CMR groups, the CSI report may include information indicating a serving cell or a non-serving cell in the report of each CMR group. The information is information indicating an association between a reference signal / measurement result and a serving cell or a non-serving cell, and may be, for example, information similar to the indicators shown in aspects 1-1 and 1-2, the extended beam index shown in aspect 1-3, or the like. When multiple CMR groups (beam pairs) are included in the CSI report, for example, the following options 1 to 3 are applied.

[0140] [[Option 1]] For each beam pair, for the first beam with the strongest (largest) RSRP / SINR, the RSRP / SINR value is reported quantized to 7 bits. For the second beam in each beam pair, a difference value based on the RSRP / SINR value of the first beam in each beam pair is reported quantized to 4 bits.

[0141] FIG. 12 is a diagram showing an example of CSI reporting in option 1 of aspect 3-1. For example, in beam pair 1, the first "1-bit indicator or a new ID" corresponds to "CRI or SSBRI # 1-1", and the second "1-bit indicator or a new ID" corresponds to "CRI or SSBRI # 1-2". "RSRP / SINR #1-1" is the RSRP / SINR value of the first beam with the strongest (largest) RSRP / SINR. "Differential RSRP / SINR #1-2" is a differential value based on the value of the first beam. The same applies to beam pair 2.

[0142] [[Option 2]] For the first beam of the first beam pair with the strongest (largest) RSRP / SINR, the RSRP / SINR value is reported quantized to 7 bits. For the second beam of the first beam pair and the beams of the other beam pairs, a difference value based on the strongest RSRP / SINR value is reported quantized to 4 bits.

[0143] The two beams of the first beam pair may be applied with the new report content (one-bit indicator or new ID) shown in the first embodiment. For the second and subsequent beam pairs, the new report content (one-bit indicator or new ID) may be applied in the same manner as for the first beam pair (see, for example, FIG. 13), or the new report content may be omitted (see, for example, FIG. 14).

[0144] Fig. 13 is a diagram showing a first example of CSI reporting in option 2 of aspect 3-1. In the example of Fig. 13, new report content (1-bit indicator or new ID) is applied to the second and subsequent beam pairs in the same manner as the first beam pair. Fig. 13 differs from Fig. 12 in that the report of beam pair 2 includes "Differential RSRP / SINR #2-1" instead of "RSRP / SINR #2-1". "Differential RSRP / SINR #2-1" is the difference value from "RSRP / SINR #1-1", which is the strongest RSRP / SINR value. Explanation of the same points as Fig. 12 will be omitted.

[0145] Fig. 14 is a diagram showing a second example of CSI reporting in option 2 of aspect 3-1. Fig. 14 differs from Fig. 13 in that the new report content "1-bit indicator or a new ID" is omitted for beam pair 2. In the example of Fig. 14, in beam pair 2, the RS of the serving cell is arranged first, followed by the RS of the non-serving cell. Note that the new report content may also be omitted for beam pair 1, as in beam pair 2.

[0146] According to option 2, the number of bits can be reduced by using differential values ​​for reporting RSRP / SINR for beams of other beam pairs.

[0147] [[Option 3]] A new RRC parameter may be configured to indicate the average RSRP / SINR value for each beam pair. In CSI reporting, for each beam pair, the serving cell's RS is placed first, followed by the non-serving cell RS. The strongest average RSRP / SINR value is quantized to 7 bits and reported. The difference between the strongest average RSRP / SINR value (average RSRP / SINR value of the first beam pair) and the average RSRP / SINR value of the other beam pairs is quantized to 4 bits and reported.

[0148] Fig. 15 is a diagram showing an example of a CSI report of option 3 in aspect 3-1. In the example of Fig. 15, the strongest RSRP / SINR average value (average value of beam pair 1) is "Ave. RSRP / SINR #1", and the difference value between the strongest RSRP / SINR average value and the RSRP / SINR average value of another beam pair (beam pair 2) is "Differential ave. RSRP / SINR #2". In addition, for each beam pair, the RS (CRI or SSBRI) of the serving cell is arranged first, followed by the RS of the non-serving cell.

[0149] Option 3 can reduce the report content. Also, the number of RSRP / SINR report contents can be the same regardless of the number of beams in a beam pair.

[0150] [[Variations]] The beam ordering and quantization rules shown in Options 1 to 3 may be applied to general group-based CSI reporting (e.g., when RS of non-serving cells is not configured) when multiple groups / beam pairs are included in the CSI report. Examples of this CSI reporting are shown in Figures 16 and 17.

[0151] FIG. 16 is a diagram showing a modified example of CSI reporting in option 1 in aspect 3-1. This is the same as the example shown in FIG. 12 except that "1-bit indicator or a new ID" is not included. FIG. 17 is a diagram showing a modified example of CSI reporting in option 2 in aspect 3-1. This is the same as the examples shown in FIG. 13 and FIG. 14 except that "1-bit indicator or a new ID" is not included. Note that, with respect to the example of option 3 (FIG. 15), the same CSI reporting configuration is achieved even in the case of general group-based beam reporting (for example, a case where a non-serving cell RS is not configured).

[0152] [Aspect 3-2] The order of the beams within each group may implicitly indicate the serving / non-serving cells. In this case, no new report content is added for Rel.15 and 16. For example, if one CSI report configuration has different CMR groups, within the report of each CMR group (beam pair) in the CSI report, first place the RS of the serving cell and then place the RS of the non-serving cell. In this case, the UE may report 7-bit RSRP / SINR values (maximum values) for each beam.

[0153] [Aspect 3-3] An example will be described where beams from different CMR groups are reported in different groups.

[0154] If only the RS of one cell is included within the same CMR group, the group index may indicate the cell index. For example, the UE may explicitly report the group index corresponding to the cell index. Or, the order of the groups to be placed may mean the group index.

[0155] If multiple non-serving cell RSs are included within the same CMR group, the examples of each aspect of the first embodiment may be applied. By applying the examples of the first embodiment, the non-serving cell indices of each beam are distinguished.

[0156] According to this embodiment, even when group-based CSI reporting is applied, the same effects as the first embodiment can be obtained. Also, CSI reporting can be appropriately performed when the CSI report has different CMR groups.

[0157] <UE capability (UE capability)> For the first to third embodiments, the UE may transmit (report) at least one of the following UE capabilities (UE capability information) (1) to (9). Note that not limited to the following examples, the UE may transmit UE capabilities indicating whether it supports at least one of the examples within the first to third embodiments.

[0158] (1) Whether to support new report content when RS of a non-serving cell (e.g., SSB) is configured in the CSI reporting configuration (RS of a serving cell may or may not be configured). The new report content may be, for example, a 1-bit indicator shown in the first embodiment, or a new ID (e.g., re-indexing indicating a non-serving cell, a group ID of a CMR, or a PCI (PCI used directly). (2) Whether to support the new report content in (1) being used for group-based beam reporting (CSI reporting).

[0159] (3) When the RS of a non-serving cell (e.g., SSB) is configured with CSI reporting configuration (the RS of the serving cell may or may not also be configured), whether or not reporting of the extended beam index shown in aspects 1-3 of the first embodiment is supported. (4) Does it support the reporting of the extended beam index in (3) to be used for group-based beam reporting (CSI reporting)?

[0160] (5) Whether to support omission / dropping of L1 beam index (CRI or SSBRI), L1-RSRP / SINR values ​​from non-serving cells.

[0161] (6) In the CSI reporting configuration for group-based beam reporting, whether or not the configuration of non-serving cell RS (the serving cell RS may or may not also be configured) is supported.

[0162] (7) Whether to support differential RSRP / SINR reporting of the second beam of each beam pair in group-based beam reporting. (8) In group-based beam reporting, whether to support reporting of differential RSRP / SINR values ​​of other beam pairs based on the RSRP / SINR value of the first beam pair. (9) Whether to support reporting of average RSRP / SINR values ​​for each beam pair in group-based beam reporting.

[0163] <Problem 2> It is preferable that the base station (gNB) obtains both L3-RSRP and L1-RSRP to determine beam selection and inter-cell mobility. For example, if the L3-RSRP result is good, the base station can decide to change the serving cell. If the L1-RSRP is good but the L3-RSRP is not good, the base station may perform a temporary beam scheduling change but may not change the serving cell. However, it is not clear how to report the L3-RSRP and L1-RSRP when the RS of non-serving cells are included in the CSI reporting configuration / CSI resource configuration.

[0164] <Fourth embodiment> When the configuration of the RS (e.g., SSB) of the serving cell and the configuration of the RS (e.g., SSB) of the non-serving cell are included in separate CSI reporting configuration / CSI resource configuration, and new RRC parameters are configured in the CSI reporting configuration / CSI resource configuration used for beam reporting, the UE may control transmission of a CSI report including an L3-RSRP (Layer 3 Reference Signal Received Power) value in addition to the SSB index (SSBRI) / CRI and the L1-RSRP value / L1-SINR value based on the CSI reporting configuration / CSI resource configuration. For example, the CSI report may include an L3-RSRP for each cell or beam. Specifically, any of the following options 1 to 3 may be applied to the reporting of the L3-RSRP value in the CSI report.

[0165] [Option 1] The CSI report may include an L3-RSRP value for each reporting beam, where the X-bit L3-RSRP value is quantized per beam.

[0166] Fig. 18 is a diagram illustrating an example of a CSI report of option 1 of the fourth embodiment. As illustrated in Fig. 18, the CSI report may include L3-RSRP values ​​(L3-RSRP#1 to L3-RSRP#4) for each beam corresponding to four beam reports.

[0167] [Option 2] One L3-RSRP value corresponding to a specific cell (reported / configured / selected cell) may be included in the CSI report. Both serving and non-serving cells may be applicable as specific cells, or only non-serving cells may be applicable. The filtered beam of cell-level L3-RSRP values ​​may follow the Radio Resource Management (RRM) measurement configuration or follow the new RRC configuration.

[0168] [Option 3] One L3-RSRP value corresponding to one or more beams (reported / configured / selected beams) for a particular cell (reported / configured / selected cell) may be included in the CSI report. The particular cell may be applicable to both serving and non-serving cells, or only non-serving cells.

[0169] The UE may assume that the filtered beams of the L3-RSRP at multi-beam level include the reported / configured / selected beams of each cell, or the filtered beams of the L3-RSRP at multi-beam level may be configured by the RRC / MAC CE.

[0170] Fig. 19 is a diagram showing examples of CSI reporting in Option 2 and Option 3 of the fourth embodiment. The L3-RSRP value included in the CSI reporting in Fig. 19 may be an L3-RSRP value corresponding to a specific cell (Option 2). The L3-RSRP value included in the CSI reporting in Fig. 19 may be an L3-RSRP value corresponding to a specific beam for a specific cell (Option 3).

[0171] The CSI report may be split into two CSI parts (a first CSI part containing L1-RSRP / SINR, and a second CSI part containing L3-RSRP). If the UCI payload is too large to be transmitted (UCI payload size is larger than the size that can be transmitted by the UE or the coding rate of UCI is larger than the maximum coding rate) and indicated by new RRC parameters, the second CSI part containing L3-RSRP may be omitted / dropped.

[0172] According to this embodiment, when the RS of a serving cell and the RS of a non-serving cell are included in separate CSI reporting configurations / CSI resource configurations, CSI reporting including the L3-RSRP in addition to the SSB index (SSBRI) / CRI and the L1-RSRP value / L1-SINR value can be appropriately controlled.

[0173] <Fifth embodiment> When both the configuration of the RS of the serving cell and the configuration of the RS (e.g., SSB) of the non-serving cell are included in the same (single) CSI reporting configuration / CSI resource configuration, the UE may control the transmission of a CSI report including the L3-RSRP value in addition to the SSB index (SSBRI) / CRI and the L1-RSRP value / L1-SINR value based on the CSI reporting configuration / CSI resource configuration. For the reporting of the L3-RSRP value, any of the following options 1 to 3 may be applied.

[0174] [Option 1] The CSI report may include an L3-RSRP value for each reporting beam, where the X-bit L3-RSRP value is quantized per beam.

[0175] Fig. 20 is a diagram showing an example of a CSI report of option 1 of the fifth embodiment. The CSI report of Fig. 20 includes information indicating a serving cell / non-serving cell (one-bit indicator or new ID) shown in the first embodiment. In addition, each L3-RSRP value (L3-RSRP#1 to L3-RSRP#4) is arranged after the L1-RSRP / SINR value. That is, the L1-RSRP / SINR value and the L3-RSRP value are arranged for each beam.

[0176] [Option 2] One L3-RSRP value corresponding to each cell (reported / configured / selected cell) may be included in the CSI report. Both serving and non-serving cells may be applicable for each cell, or only non-serving cells may be applicable. The filtered beam of cell-level L3-RSRP values ​​may follow the RRM measurement configuration or follow the new RRC configuration.

[0177] [Option 3] One L3-RSRP value corresponding to one or more beams (reported / configured / selected beams) for each cell (reported / configured / selected cell) may be included in the CSI report. For each cell, both the serving cell and the non-serving cell may be applicable, or only the non-serving cell may be applicable.

[0178] The UE may assume that the filtered beams of the L3-RSRP at multi-beam level include the reported / configured / selected beams of each cell, or the filtered beams of the L3-RSRP at multi-beam level may be configured by the RRC / MAC CE.

[0179] Fig. 21 is a diagram showing a first example of CSI reporting in option 2 and option 3 of the fifth embodiment. In Fig. 21, an index (a 1-bit indicator or a new ID shown in the first embodiment) indicating a serving cell or a non-serving cell corresponding to an L3-RSRP value is arranged.

[0180] FIG. 22 is a diagram showing a second example of CSI reporting in option 2 and option 3 of the fifth embodiment. FIG. 22 is similar to the example of FIG. 10 of the first embodiment, except that L3-RSRP is added. That is, for CRI or SSBRI, and L1-RSRP / SINR value, the UE places the report for the RS of the serving cell first, and then the report for the non-serving cell RS. For L3-RSRP, the UE also places the L3-RSRP for the RS of the serving cell first, and then the L3-RSRP for the RS of the non-serving cell, so that there is no need to place a 1-bit indicator or a new ID. As shown in FIG. 22, the CSI report may be divided into a first CSI part including CRI or SSBRI, and L1-RSRP / SINR value, and a second CSI part including L3-RSRP.

[0181] Figure 23 is a diagram showing a third example of CSI reporting for option 2 and option 3 of the fifth embodiment. For one 1-bit indicator or new ID indicating a serving cell / non-serving cell, a CRI or SSBRI, an L1-RSRP / SINR value, and an L3-RSRP value are arranged. As shown in Figure 23, the CSI report may be divided into a first CSI part related to the serving cell and a second CSI part related to the non-serving cell.

[0182] If the UCI payload is of a size that cannot be transmitted (the UCI payload size is larger than the size that can be transmitted by the UE or the coding rate of the UCI is larger than the maximum coding rate) and is indicated by new RRC parameters, the second CSI portion in Figures 22 and 23 may be omitted / dropped.

[0183] In option 2, "L3-RSRP#cell 2" may be obtained based on all SSB beams from cell 2 according to the RRM measurement configuration.

[0184] In Option 3, "L3-RSRP#cell 2" may be obtained based on the reported "CRI or SSBRI #3" and "CRI or SSBRI #4". Also, "L3-RSRP#cell 2" may be obtained based on the CRI or SSBRI set in the CMR setting of the CSI report configuration.

[0185] According to this embodiment, when both the serving cell RS and the non-serving cell RS are included in the same (one) CSI report configuration / CSI resource configuration, in addition to the SSB index (SSBRI) / CRI and the L1-RSRP value / L1-SINR value, the CSI report including L3-RSRP can be appropriately controlled.

[0186] <UE capability (UE capability)> For the fourth and fifth embodiments, the UE may transmit (report) at least one of the following (1) to (8) UE capabilities (UE capability information). Note that, not limited to the following examples, the UE may transmit a UE capability indicating whether it supports at least one of each example within the fourth and fifth embodiments. Note that (1) to (7) are UE capabilities regarding the L3-RSRP report arranged within the CSI report together with the L1 beam report.

[0187] (1) Whether to apply the L3-RSRP report to the serving cell and non-serving cells, or only to non-serving cells. (2) The maximum number of cells (non-serving cells) for which the L3-RSRP measurement / report is set per UE / CC / BWP / CSI report. (3) Whether to support the L3-RSRP measurement / report per beam. (4) Whether to support the L3-RSRP measurement / report per cell.

[0188] (5) Whether to support the filtered L3-RSRP measurement / report of the reported / configured beam. (6) Whether to support the beam configuration for the L3-RSRP measurement / report by RRC / MAC CE. (7) Whether to support additional report content for L3-RSRP reporting (e.g., re-indexing to indicate non-serving cells, group ID of CMR, or PCI used directly).

[0189] (8) Whether to support skipping / dropping L3-RSRP measurements / reports.

[0190] Sixth embodiment In the current specification, UCI priority rules and UCI omission rules are specified for UCI in PUCCH / PUSCH. Beam reports have higher priority than other UCI. However, the priority of beam reports (CSI reports) containing beam information of non-serving cells is not clear.

[0191] As described in the first embodiment, the index of the SSB may be extended in the future. In other words, a beam report including information on both the serving cell and the non-serving cell may have a larger UCI size than the current beam report. Therefore, it is possible to determine the priority as in the following option 1 or option 2.

[0192] [Option 1] Regardless of whether the UCI (such as L1-RSRP) includes information of non-serving cells, the same UCI priority rule and the same UCI omission rule may be specified for the UCI of the PUCCH / PUSCH. This allows the current specifications to be applied as is.

[0193] [Option 2] Usually, the same UCI priority rule and UCI omission rule are specified for UCI of PUCCH / PUSCH between different UCIs. However, the UCI for the serving cell is set to have a higher priority than the UCI for the non-serving cell. Also, the UCI for the serving cell is not omitted by the UCI for the non-serving cell. This can prevent the UCI for the serving cell from being unable to be transmitted. This is because the UCI for the serving cell is more important than the UCI for the non-serving cell and has fewer UCI bits.

[0194] According to this embodiment, the priority of a beam report including beam information of a non-serving cell can be appropriately set.

[0195] (Wireless communication systems) A 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 of these methods.

[0196] 24 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0197] Furthermore, the wireless communication system 1 may support dual connectivity between a plurality of 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)), and the like.

[0198] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN) and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN and the LTE (E-UTRA) base station (eNB) is the SN.

[0199] The wireless communication system 1 may support dual connectivity between multiple base stations in the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0200] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as a base station 10.

[0201] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0202] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

[0203] Furthermore, the user terminal 20 may perform communication in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0204] The multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to Common Public Radio Interface (CPRI), 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.

[0205] 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 at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0206] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0207] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), 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), etc. may be used.

[0208] The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0209] 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 a downlink channel.

[0210] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0211] 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).

[0212] 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 of at least one of the PDSCH and the PUSCH.

[0213] In addition, DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

[0214] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0215] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in the present disclosure may be read as interchangeable terms.

[0216] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0217] In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels.

[0218] 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.

[0219] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal.

[0220] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal).

[0221] (base station) 25 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 one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

[0222] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0223] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with 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.

[0224] 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 transmission and reception unit 120, the transmission and reception 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 transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0225] 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.

[0226] 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, an RF unit 122, and a measurement unit 123.

[0227] The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0228] 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.

[0229] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0230] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0231] The transceiver 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.

[0232] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna .

[0233] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna .

[0234] 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.

[0235] 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.

[0236] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, etc.

[0237] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0238] The transceiver 120 may transmit one channel state information (CSI) reporting configuration including both the reference signal configuration of the serving cell and the reference signal configuration of the non-serving cell.

[0239] The control unit 110 may control reception of a CSI report including information indicating the serving cell or the non-serving cell, the CSI report being transmitted based on one CSI reporting configuration. In the CSI report, a report on a reference signal of the serving cell may be arranged first, and a report on a reference signal of the non-serving cell may be arranged next.

[0240] When the one CSI reporting configuration has different channel measurement resource (CMR) groups, the CSI report may include information indicating the serving cell or the non-serving cell in a report of each of the CMR groups. When the one CSI reporting configuration has different channel measurement resource (CMR) groups, a report on a reference signal of the serving cell may be arranged first and a report on a reference signal of the non-serving cell may be arranged second in a report of each of the CMR groups in the CSI report.

[0241] The transceiver 120 may transmit one or more channel state information (CSI) reporting configurations including a reference signal configuration of the serving cell and a reference signal configuration of the non-serving cell.

[0242] The control unit 110 may control reception of a CSI report including a reference signal received power in Layer 3 (L3-RSRP) transmitted based on the one or more CSI reporting configurations. When a reference signal configuration of a serving cell and a reference signal configuration of a non-serving cell are included in different CSI reporting configurations, the CSI report may include the L3-RSRP for each cell or beam.

[0243] When both a configuration of a reference signal of a serving cell and a configuration of a reference signal of a non-serving cell are included in one CSI reporting configuration, the CSI report may include information indicating the serving cell or the non-serving cell corresponding to the L3-RSRP.When both a reference signal of a serving cell and a reference signal of a non-serving cell are included in one CSI reporting configuration, the L3-RSRP for the reference signal of the serving cell may be arranged first in the CSI report, and the L3-RSRP for the reference signal of the non-serving cell may be arranged next.

[0244] (User terminal) 26 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230.

[0245] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0246] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured with 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.

[0247] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission / reception unit 220.

[0248] The transmitting / receiving 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 transmitting / receiving unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting / receiving circuit, and the like, which are described based on common understanding in the technical field related to the present disclosure.

[0249] 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.

[0250] The transmitting / receiving antenna 230 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

[0251] 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.

[0252] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0253] 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.

[0254] The transceiver 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 sequence to be transmitted, and output a baseband signal.

[0255] Whether or not to apply the DFT process may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver 220 (transmission processor 2211) may perform the DFT process as the transmission process to transmit the channel using a DFT-s-OFDM waveform, and may not perform the DFT process as the transmission process if transform precoding is enabled for the channel.

[0256] The transceiver unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 230.

[0257] 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 signal received by the transceiver antenna 230.

[0258] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0259] 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.

[0260] In addition, the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0261] The transceiver 220 may receive one channel state information (CSI) reporting configuration including both the reference signal configuration of the serving cell and the reference signal configuration of the non-serving cell.

[0262] Controller 210 may control transmission of a CSI report including information indicating the serving cell or the non-serving cell based on the one CSI reporting configuration. Controller 210 may place a report on a reference signal of the serving cell first and a report on a reference signal of the non-serving cell second in the CSI report.

[0263] When the one CSI reporting configuration has different channel measurement resource (CMR) groups, the CSI report may include information indicating the serving cell or the non-serving cell in a report of each of the CMR groups. When the one CSI reporting configuration has different channel measurement resource (CMR) groups, control unit 210 may arrange a report on a reference signal of the serving cell first and a report on a reference signal of the non-serving cell second in a report of each of the CMR groups in the CSI report.

[0264] In addition, the transceiver 220 may receive one or more channel state information (CSI) reporting configurations including a reference signal configuration of a serving cell and a reference signal configuration of a non-serving cell.

[0265] Controller 210 may control transmission of a CSI report including reference signal received power in Layer 3 (L3-RSRP) based on the one or more CSI reporting configurations. When a reference signal configuration of a serving cell and a reference signal configuration of a non-serving cell are included in different CSI reporting configurations, the CSI report may include the L3-RSRP for each cell or beam.

[0266] When both a configuration of a reference signal of a serving cell and a configuration of a reference signal of a non-serving cell are included in one CSI reporting configuration, the CSI report may include information indicating the serving cell or the non-serving cell corresponding to the L3-RSRP. When both a reference signal of a serving cell and a reference signal of a non-serving cell are included in one CSI reporting configuration, control unit 210 may arrange the L3-RSRP for the reference signal of the serving cell first in the CSI report, and arrange the L3-RSRP for the reference signal of the non-serving cell next.

[0267] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0268] 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, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, and the like. In either case, as described above, the method of realization is not particularly limited.

[0269] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 27 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned 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.

[0270] In this disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0271] For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processes may be performed by one processor, or the processes may be performed by two or more processors simultaneously, sequentially, or in other manners. Also, the processor 1001 may be implemented by one or more chips.

[0272] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0273] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0274] Moreover, the processor 1001 reads out 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 according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks may be realized in a similar manner.

[0275] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory (primary storage device), and the like. The memory 1002 can store a program (program code), a software module, and the like that is executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0276] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0277] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order 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.

[0278] 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 performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0279] In addition, 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.

[0280] 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), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0281] (Modification) In addition, the terms explained in this disclosure and the terms necessary for understanding this 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 read as mutually interchangeable. A signal may also be a message. A reference signal may also be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, etc.

[0282] 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.

[0283] Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0284] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology.

[0285] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed 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.

[0286] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A different name may be used for 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 read as interchangeable with each other.

[0287] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the 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.

[0288] Here, TTI refers to, for example, the minimum 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.

[0289] 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) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0290] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0291] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0292] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0293] 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 the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0294] 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 one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0295] In addition, one or more RBs may be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0296] 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.

[0297] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0298] The BWP may include a UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0299] 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 replaced with "BWP".

[0300] The above-mentioned structures of radio frames, subframes, slots, minislots, and symbols 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, and other configurations can be changed in various ways.

[0301] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0302] The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the formulas 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 limiting in any way.

[0303] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the 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.

[0304] 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.

[0305] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0306] 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.

[0307] The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, by using a MAC Control Element (CE).

[0308] 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).

[0309] The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or by comparing numerical values ​​(e.g., with a predetermined value).

[0310] 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.

[0311] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the 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, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0312] 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).

[0313] 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," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," and the like may be used interchangeably.

[0314] In this disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0315] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0316] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0317] 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.

[0318] 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. At least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include a device that does not necessarily move during communication operation. 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.

[0319] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment 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 a plurality of 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, an uplink channel, a downlink channel, etc. may be read as a sidelink channel.

[0320] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0321] In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. It is clear that in a network including one or more network nodes having base stations, various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0322] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be reordered 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.

[0323] Each aspect / embodiment described in the present disclosure may be implemented using any of a wide variety of standards, including 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) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems using 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other appropriate wireless communication methods, next-generation systems that are based on these, etc. In addition, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0324] 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."

[0325] 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, and the like.

[0326] A "determining" may also be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

[0327] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "deciding" to perform some action.

[0328] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0329] 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 the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0330] 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, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

[0331] 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."

[0332] 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." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0333] In this disclosure, where articles have been 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.

[0334] 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 invention according to the present disclosure can be implemented as modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure.

Claims

1. A receiving unit for receiving one channel state information (CSI) resource configuration corresponding to both an SS / PBCH Block (SSB) configuration of a serving cell and an SSB configuration of a non-serving cell; A control unit for controlling transmission of CSI reports, An index indicating a non-serving cell corresponding to the CSI resource configuration is set, and the index uses fewer information bits than physical cell identity (PCI). Terminal.

2. When group-based beam reporting is applied, the CSI report includes both a reference signal received power (RSRP) corresponding to an SSB of the serving cell and an RSRP corresponding to an SSB of the non-serving cell. The terminal according to claim 1.

3. receiving one channel state information (CSI) resource configuration corresponding to both a serving cell SS / PBCH Block (SSB) configuration and a non-serving cell SSB configuration; and controlling transmission of the CSI report. An index indicating a non-serving cell corresponding to the CSI resource configuration is set, and the index uses fewer information bits than a physical cell identity (PCI). The terminal's wireless communication method.

4. A transmitter for transmitting one channel state information (CSI) resource configuration corresponding to both an SS / PBCH Block (SSB) configuration of a serving cell and an SSB configuration of a non-serving cell; A control unit for controlling reception of CSI reports, The control unit sets an index indicating a non-serving cell corresponding to the CSI resource configuration, and the index uses fewer information bits than a physical cell identity (PCI). Base station.

5. A system including a terminal and a base station, The terminal includes: A receiving unit for receiving one channel state information (CSI) resource configuration corresponding to both an SS / PBCH Block (SSB) configuration of a serving cell and an SSB configuration of a non-serving cell; A control unit for controlling transmission of CSI reports, The base station has a control unit that controls reception of a CSI report, An index indicating a non-serving cell corresponding to the CSI resource configuration is set, and the index uses fewer information bits than a physical cell identity (PCI). system.

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