WO2020213163A1 - ユーザ端末及び無線通信方法 - Google Patents
ユーザ端末及び無線通信方法 Download PDFInfo
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- WO2020213163A1 WO2020213163A1 PCT/JP2019/016862 JP2019016862W WO2020213163A1 WO 2020213163 A1 WO2020213163 A1 WO 2020213163A1 JP 2019016862 W JP2019016862 W JP 2019016862W WO 2020213163 A1 WO2020213163 A1 WO 2020213163A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
Definitions
- the present disclosure relates to a user terminal and a wireless communication method in a next-generation mobile communication system.
- LTE Long Term Evolution
- 3GPP Rel.10-14 LTE-Advanced (3GPP Rel.10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).
- a successor system to LTE for example, 5th generation mobile communication system (5G), 5G + (plus), New Radio (NR), 3GPP Rel.15 or later, etc.) is also being considered.
- 5G 5th generation mobile communication system
- 5G + plus
- NR New Radio
- 3GPP Rel.15 or later, etc. is also being considered.
- BM beam management
- L1-RSRP Layer 1 Reference Signal Received Power
- one of the purposes of this disclosure is to provide a user terminal and a wireless communication method capable of performing appropriate beam reporting.
- the user terminal receives the first setting information including the parameter of the report amount of the channel state information indicating the report of the signal-to-interference noise ratio (SINR).
- SINR Signal-to-interference noise ratio
- the second setting information including the parameter of the report amount of the channel state information indicating the report of the reference signal reception power (Reference Signal Received Power (RSRP)) is received, the corresponding RSRP value is large. It is characterized by having a control unit that controls to report a predetermined number of the SINRs from the side.
- an appropriate beam report can be made.
- FIG. 1 is an excerpt of the RRC information element “CSI-ReportConfig”.
- 2A and 2B are diagrams showing an example of RRC parameters showing index information.
- 3A and 3B are diagrams showing another example of the RRC parameter showing the index information.
- FIG. 4 is a diagram showing an example of the reporting amount for reporting SINR.
- FIG. 5 is a diagram showing another example of the reporting amount for reporting SINR.
- FIG. 6 is a diagram showing an example of a resource for CSI measurement and a resource for CSI reporting.
- FIG. 7 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- FIG. 8 is a diagram showing an example of the configuration of the base station according to the embodiment.
- FIG. 9 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
- FIG. 10 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
- the UE measures the channel state using a predetermined reference signal (or a resource for the reference signal), and feeds back (reports) the channel state information (CSI) to the base station. ..
- the UE is a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a synchronization signal / broadcast channel (Synchronization Signal / Physical Broadcast Channel (SS / PBCH)) block, a synchronization signal (Synchronization Signal (SS)).
- CSI-RS Channel State Information Reference Signal
- SS Physical Broadcast Channel
- SS synchronization Signal
- DMRS DeModulation Reference Signal
- the CSI-RS resource may include at least one of non-zero power (NZP)) CSI-RS and CSI-Interference Management (CSI-IM).
- the SS / PBCH block is a block containing a synchronization signal (for example, a primary synchronization signal (PSS: Primary Synchronization Signal), a secondary synchronization signal (SSS: Secondary Synchronization Signal)) and a PBCH (and a corresponding DMRS), and is an SS block (for example, a SS block (PSS: Primary Synchronization Signal)). It may be called SSB) or the like.
- the CSI is a channel quality identifier (CQI: Channel Quality Indicator), a precoding matrix identifier (PMI: Precoding Matrix Indicator), a CSI-RS resource identifier (CRI: CSI-RS Resource Indicator), and an SS / PBCH block resource identifier (CRI: CSI-RS Resource Indicator).
- CQI Channel Quality Indicator
- PMI Precoding Matrix Indicator
- CRI CSI-RS resource identifier
- SS / PBCH block resource identifier CRI: CSI-RS Resource Indicator
- SSBRI SS / PBCH Block Indicator
- layer identifier LI: Layer Indicator
- rank identifier RI: Rank Indicator
- L1-RSRP reference signal reception power in layer 1 (Layer 1 Reference Signal Received Power)
- L1- It may contain at least one such as RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), and L1-SNR (Signal to Noise Ratio).
- 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 (for example, RI).
- the second part of the CSI (CSI part 2) may include information having a relatively large number of bits (for example, CQI), such as information determined based on the CSI part 1.
- CSI feedback methods include (1) periodic CSI (P-CSI: Periodic CSI) reports, (2) aperiodic CSI (A-CSI: Aperiodic CSI) reports, and (3) semi-permanent (semi-permanent) reports.
- Periodic CSI Periodic CSI
- A-CSI Aperiodic CSI
- semi-permanent semi-permanent
- the UE notifies information regarding CSI reporting (which may be referred to as CSI report setting information) using upper layer signaling, physical layer signaling (for example, downlink control information (DCI)) or a combination thereof. May be done.
- the CSI report setting information may be set by using, for example, the RRC information element "CSI-ReportConfig".
- the upper layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.
- RRC Radio Resource Control
- MAC Medium Access Control
- MAC CE MAC Control Element
- PDU MAC Protocol Data Unit
- the broadcast information includes, for example, a master information block (Master Information Block (MIB)), a system information block (System Information Block (SIB)), a minimum system information (Remaining Minimum System Information (RMSI)), and other system information ( Other System Information (OSI)) may be used.
- MIB Master Information Block
- SIB System Information Block
- RMSI Minimum System Information
- OSI Other System Information
- the CSI report setting information may include, for example, information on the report cycle, offset, etc., and these may be expressed in predetermined time units (slot unit, subframe unit, symbol unit, etc.).
- the CSI report setting information may include a setting ID (CSI-ReportConfigId), and the setting ID may specify parameters such as the type of CSI reporting method (whether SP-CSI or not, etc.) and the reporting cycle.
- the CSI report setting information may include information (CSI-ResourceConfigId) indicating which signal (or resource for which signal) is used to report the measured CSI.
- Beam management So far, a beam management (BM) method has been studied for Rel-15 NR. In the beam management, it is considered to perform beam selection based on the L1-RSRP reported by the UE. Changing (switching) the beam of a signal / channel may correspond to changing the Transmission Configuration Indication state (TCI state) of that signal / channel.
- TCI state Transmission Configuration Indication state
- the beam selected by the beam selection may be a transmission beam (Tx beam) or a reception beam (Rx beam). Further, the beam selected by the beam selection may be the beam of the UE or the beam of the base station.
- Tx beam transmission beam
- Rx beam reception beam
- the beam selected by the beam selection may be the beam of the UE or the beam of the base station.
- the UE may report (transmit) the measurement result for beam management using PUCCH or PUSCH.
- the measurement result may be, for example, a CSI containing at least one such as L1-RSRP, L1-RSRQ, L1-SINR, and L1-SNR. Further, the measurement result may be referred to as a beam measurement, a beam measurement report, a beam measurement result, a beam report (beam report), a beam report CSI, or the like.
- CSI measurements for beam reports may include interference measurements.
- the UE may use the resources for CSI measurement to measure channel quality, interference, etc. and derive a beam report.
- the resource for CSI measurement may be at least one such as an SS / PBCH block resource, a CSI-RS resource, and other reference signal resources.
- the setting information of the CSI measurement report may be set in the UE using higher layer signaling.
- the resources for interference measurement are IMR (Interference Measurement Resource), CSI-IM (Interference Measurement) resource, Zero Power (ZP: Zero Power) CSI-RS Resource, and Non-Zero Power (NZP: Non-Zero). It may be read by at least one of Power) CSI-RS resource, SS / PBCH block resource, and the like.
- the beam report may include the results of at least one of the channel quality measurement and the interference measurement.
- the result of the channel quality measurement may include, for example, L1-RSRP.
- the result of the interference measurement may include L1-SINR, L1-SNR, L1-RSRQ, and other indicators related to interference (for example, any index other than L1-RSRP).
- the resource for CSI measurement for beam management may be called a resource for beam measurement.
- the signal / channel to be measured by CSI may be referred to as a beam measurement signal.
- the CSI measurement / report may be read as at least one of measurement / report for beam management, beam measurement / report, wireless link quality measurement / report, and the like.
- FIG. 1 is an excerpt of the RRC information element “CSI-ReportConfig”.
- FIG. 1 shows ASN. It is described using the 1 (Abstract Syntax Notation One) notation (the same applies to FIG. 2-5 described later).
- the CSI report setting information includes the RRC parameters "resourcesForChannelMeasurement”, “csi-IM-ResourcesForInterference”, “nzp-CSI-RS-ResourcesForInterference”, etc., which indicate the Identifier (ID) of the CSI resource setting to be measured. Good.
- ResourcesForChannelMeasurement indicates the CSI-RS resources used for channel measurement
- csi-IM-ResourcesForInterference indicates the CSI-IM resources for interference measurement
- nzp-CSI-RS-ResourcesForInterference NZP CSI-RS resource for interference measurement
- the CSI report setting information may include "report quantity” (which may be represented by the RRC parameter “reportQuantity”), which is information on parameters to be reported by one report instance (for example, one CSI).
- the amount of reports is referred to as "choice” by ASN. It is defined by the type of one object. Therefore, one of the parameters defined as the reported amount (cri-RSRP, ssb-Index-RSRP, etc.) is set.
- a UE in which the upper layer parameter (for example, the RRC parameter “groupBasedBeamReporting”) included in the CSI report setting information is set to enabled has a plurality of beam measurement resource IDs (for example, SSBRI, CRI) for each report setting. And a plurality of measurement results (for example, L1-RSRP) corresponding to these may be included in the beam report.
- a UE whose number of reportable RS resources is set by one or more upper layer parameters (for example, RRC parameter "nrofReportedRS") included in the CSI report setting information is one or more beam measurement resources for each report setting.
- the ID and one or more measurement results corresponding to these may be included in the beam report.
- cri-RSRP and ssb-Index-RSRP are related to beam management.
- UEs configured with cri-RSRP report the CRI and the L1-RSRP corresponding to that CRI.
- UEs configured with ssb-Index-RSRP report SSBRI and L1-RSRP corresponding to the CRI.
- the beam selection can only be performed based on L1-RSRP only.
- the beam report it is not possible to set the beam report to include an interference report (report such as L1-SINR). If the beam selection and reporting are related only to L1-RSRP, the beam selection cannot be performed properly, and there is a possibility that a decrease in communication throughput or the like becomes a problem.
- the present inventors have conceived a CSI report setting for appropriate beam reporting.
- interference SINR, SNR, RSRQ, interference power, etc. may be read as each other.
- the first embodiment relates to setting the beam selection.
- index information Information about the beam selection criteria (index) may be set in the UE using higher layer signaling.
- the information may be referred to as index information.
- the index information may be defined by a new RRC parameter (or RRC information element).
- the index information may be defined by, for example, the RRC parameter "beamselectioncriteria (or beamSelectionCriteria)".
- the index information may be included in the CSI report setting information (CSI-ReportConfig) and notified to the UE, or may be notified separately from the CSI report setting information.
- the UE may perform beam selection based only on L1-RSRP, beam selection based only on L1-SINR, or both L1-RSRP and L1-SINR based on the above index information. Based beam selection may be made.
- FIGS. 2A and 2B are diagrams showing an example of RRC parameters showing index information.
- the UE may use, for example, any of the following as an index for beam selection based on the values of the index information in FIGS. 2A and 2B: ⁇ L1-RSRP, ⁇ L1-SINR, -L1-RSRP and L1-SINR.
- FIG. 2A shows ASN. This is an example of the definition when CHOICE of 1 notation is used. In the case of CHOICE, only one of the listed values can be selected, so it is necessary to include such a field when specifying multiple indicators. For example, when instructing L1-RSRP and L1-SINR, "L1-RSRP-SINR" is selected.
- FIG. 2B shows ASN. It is an example of the definition when SEQUENCE of 1 notation is used. In the case of SEQUENCE, one or more of the listed values can be selected ("OPTIONAL" means not required), so even if multiple indices are specified, multiple individual fields may be included. For example, when instructing L1-RSRP and L1-SINR, "L1-RSRP" and “L1-SINR” are selected.
- 3A and 3B are diagrams showing another example of the RRC parameter showing the index information.
- the UE may use, for example, any of the following as an index for beam selection based on the values of the index information in FIGS. 3A and 3B: ⁇ Csi-RSRP, ⁇ Ssb-RSRP, ⁇ Csi-SINR, ⁇ Ssb-SINR, Csi-RSRP and csi-SINR, -Ssb-RSRP and ssb-SINR.
- FIGS. 3A and 3B correspond to the indicators of FIGS. 2A and 2B expressed in concrete measurement contents, respectively.
- L1-RSRP / SINR ssb-RSRP / SINR, which is actually a measured value based on CSI-RS or csi-RSRP / SINR or SSB (for example, SSS and / or DMRS in SSB), is used. This is to be done.
- the report amount included in the CSI report setting information may indicate a measurement result different from the index indicated by the index information.
- the UE determines the beam selection criteria (index) based on the report quantity (“reportQuantity”) included in the CSI report setting information. You may decide.
- the UE when the reporting amount set in the UE directs the reporting of csi-SINR, the UE performs beam selection based on L1-SINR (csi-SINR) and determines the csi-SINR for the selected beam. You may report. Candidates for the reported amount will be described later in the second embodiment.
- the UE can appropriately determine the criteria for beam selection and perform beam selection.
- the second embodiment relates to setting a reporting amount for reporting SINR.
- the report amount may be an extension of the existing RRC parameter "reportQuantity" or may be represented by a new RRC parameter.
- the new RRC parameter may be included in the CSI report configuration information (CSI-ReportConfig) and notified to the UE.
- FIG. 4 is a diagram showing an example of the reporting amount for reporting SINR.
- the report amount parameter included in the CSI report setting information is an extension of the existing RRC parameter "reportQuantity”.
- ⁇ Csi-SINR when "cri-SINR” is set
- -Ssb-SINR when "ssb-Index-SINR” is set
- the UE may report the csi-SINR and the CRI corresponding to the csi-SINR.
- the UE may include the CRI corresponding to the measurement result in the report including the measurement result starting with "csi-”.
- the UE may include the SSBRI corresponding to the measurement result in the report including the measurement result starting with "ssb-”.
- a name starting with “cri-” such as “cri-SINR” may be read as a name starting with “csi-” such as “csi-SINR”.
- FIG. 5 is a diagram showing another example of the reporting amount for reporting SINR.
- the report amount parameter included in the CSI report setting information is set by the new RRC parameter "reportQuantity-r16".
- the report target that can be specified may be the same as that described in FIG.
- This parameter may be notified to, for example, a UE that conforms to Rel-16 NR.
- the UE may ignore "reportQuantity” when "reportQuantity-r16" is set.
- the Rel-15 UE may be notified of the existing RRC parameter "report Quantity”.
- the Rel-15 UE may ignore the setting of "reportQuantity-r16". By doing so, backward compatibility of specifications can be ensured.
- the UE may make at least one of the following assumptions if a reporting volume is set to report at least one of csi-SINR and ssb-SINR: -Perform low-latency beam selection (or measurement or reporting) -Make low overhead beam selection (or measure or report), ⁇ Recover beam failure in secondary cell -Use interference measurement results (eg SINR) for beam failure recovery, -Use interference measurement results (eg SINR) for beam selection, -Include interference measurement results (eg, SINR) in the beam report.
- a reporting volume is set to report at least one of csi-SINR and ssb-SINR: -Perform low-latency beam selection (or measurement or reporting) -Make low overhead beam selection (or measure or report), ⁇ Recover beam failure in secondary cell -Use interference measurement results (eg SINR) for beam failure recovery, -Use interference measurement results (eg SINR) for beam selection, -Include interference measurement results (e
- the low latency beam selection includes high-speed beam selection, beam selection without TCI state (beam selection w / o TCI state), beam selection type II (beam selection type II), and low latency beam selection. It may be called TCI state designation type 2 or the like.
- the low overhead beam selection may be, for example, a method of skipping the report of the beam report under a predetermined condition.
- the UE may transmit UE capability information regarding whether or not SINR can be reported to the base station.
- the base station may set the reporting amount shown in the second embodiment for the UE having the UE capability information.
- the UE in which the number of RS resources to be reported is set to one or more by the upper layer parameter (for example, the RRC parameter “nrofReportedRS”) included in the CSI report setting information is L1-RSRP or L1-
- the SINR may be reported in the form of a difference from the maximum L1-RSRP or L1-SINR.
- the UE can appropriately determine the beam reporting target.
- a third embodiment relates to the setting of reporting for L1-RSRP and L1-SINR.
- L1-RSRP may be reported.
- the UE may be set to make measurements for L1-SINR. For example, if the UE reports a quality parameter (reportQuantity) contained in the received CSI report configuration information (CSI-ReportConfig information element of RRC signaling) indicates a measurement for L1-SINR, then for L1-SINR. It may be determined that the measurement is set.
- the reportQuantity may mean the reportQuantity as shown in FIG. 4, or may mean the reportQuantity-r16 as shown in FIG.
- the UE may perform the L1-SINR measurement and transmit the L1-SINR to the base station.
- the base station may determine at least one beam based on reports from the UE (L1-RSRP and L1-SINR).
- the UE uses higher layer signaling to provide a first measurement resource (SS / PBCH block or CSI-RS resource) for L1-RSRP measurement (or calculation) and L1-SINR measurement (or calculation).
- a first measurement resource SS / PBCH block or CSI-RS resource
- L1-RSRP is measured using the first measurement resource
- the second measurement resource is used.
- L1-SINR may be measured and L1-RSRP and L1-SINR may be reported for beam management.
- the UE may measure the resource for L1-RSRP measurement of the first number.
- the UE is the second number L1-that satisfies a predetermined condition (for example, a larger value) among the measurement results (L1-RSRP) corresponding to the resource for the first number L1-RSRP measurement.
- RSRP may be reported.
- the setting information for L1-RSRP measurement of the first number (for example, information on the ID and the resource position for measurement (cycle, etc.) may be included), the information on the second number, etc. are higher layer signaling and physical layer signaling. Alternatively, a combination of these may be used to set (notify) the UE.
- the UE may measure the resource for the third number of L1-SINR measurement.
- the UE is the measurement result of the fourth number (for example, a smaller value) that satisfies a predetermined condition among the measurement results (L1-SINR) corresponding to the resource for the L1-SINR measurement of the third number. May be reported.
- the setting information for L1-SINR measurement of the third number (for example, information on the ID and the resource position for measurement (cycle, etc.) may be included), the information on the fourth number, etc. are higher layer signaling and physical layer signaling. Alternatively, a combination of these may be used to set (notify) the UE.
- first number and the third number may be the same or different.
- the second number and the fourth number may be the same or different.
- the UE measures the default resource for L1-SINR measurement and performs the L1-SINR measurement. You may go.
- the default resource may be separately set in the UE by higher layer signaling or may be defined by specifications.
- the UE sets the set of L1-SINR values to be reported in the following (1)-(4).
- the UE may determine that L1-RSRP and L1-SINR correspond (associate) if at least one of the following conditions is met: -CSI resource setting IDs to be measured (for example, “resourcesForChannelMeasurement”, “csi-IM-ResourcesForInterference”, "nzp-” included in CSI report setting information (CSI-ReportConfig) including "reportQuantity” indicating the L1-RSRP measurement.
- CSI resource setting IDs to be measured for example, "resourcesForChannelMeasurement", “csi-IM-ResourcesForInterference", "nzp-” included in CSI report setting information (CSI-ReportConfig) including "reportQuantity” indicating the L1-RSRP measurement.
- At least one of the CSI-RS-ResourcesForInterference is included in another CSI report configuration information (CSI-ReportConfig) that includes a "reportQuantity" that indicates the L1-SINR measurement (eg, "CSI-ReportConfig").
- CSI-ReportConfig CSI report configuration information
- csi-IM-ResourcesForInterference nzp-CSI-RS-ResourcesForInterference
- the measurement resource for the L1-RSRP eg, SSB, CSI-RS, etc.
- the measurement resource for the L1-RSRP is the same as or the pseudo-collocation for the measurement resource for the L1-SINR (eg, SSB, CSI-RS, etc.).
- QCL Quasi-Co-Location
- the UE when the UE drops at least one of L1-RSRP and L1-SINR (in other words, does not transmit or skips), the UE reports L1-in accordance with (1) above.
- the set of SINR values may be determined, or the set of L1-SINR values reported according to (2) above may be determined. Which to follow may be determined based on which of L1-RSRP and L1-SINR is dropped, or based on at least one L1-RSRP and L1-SINR to be dropped or transmitted. Good.
- L1-SINR may be represented by a predetermined number of bits (eg, m bits), which are used to represent a predetermined range (eg, [-140, -44]) in a predetermined step size (eg, 1 dB step size).
- a predetermined range eg, [-140, -44]
- a predetermined step size eg, 1 dB step size.
- a range of dBm, a range of [-30, +20] dBm) may be expressively configured.
- the L1-SINR corresponding to the smallest or largest measurement value is represented by the predetermined number of bits (for example, m bits), and the other L1-SINRs are described above. Bits less than a predetermined number (eg, n bits) may be expressed as the difference from the smallest or largest measurement.
- the sort order of L1-SINR included in the CSI report may be the descending order or ascending order of the corresponding L1-RSRP values, or the descending or ascending order of the L1-SINR values, and is set.
- the index for measurement or reporting (for example, report setting ID (CSI-ReportConfigId), measurement setting ID (CSI-ResourceConfigId)) may be in descending or ascending order.
- index, ID, indicator, resource ID, etc. may be read as each other.
- the order of L1-SINR included in the CSI report is, for example, the descending order of the L1-SINR values when reporting a set of L1-SINR values determined according to (1), (4) and the like described above. It is preferably in ascending order.
- L1-SINR included in the CSI report corresponds to the i-th largest value in the order (i is an integer) (that is, monotonically decreases or monotonically increases in the order).
- the range of n-bit difference values may be set or defined to be, for example, a range of 0 or less (or a range of 0 or more).
- the sort order of L1-SINR included in the CSI report is, for example, the value of the corresponding L1-RSRP when reporting a set of L1-SINR values determined according to (2), (3) and the like described above. Descending or ascending order is preferred.
- the i + 1th L1-SINR included in the CSI report may be larger or smaller than the i-th L1-SINR, so that the range of the n-bit difference values described above is , For example, may be set or defined to include both positive and negative values.
- the UE has a first table in which the value range is limited to either 0 or less or 0 or more, and the value range. You may use properly with the second table which contains both positive and negative.
- the bit value of L1-SINR is determined with reference to the first table and described above.
- the bit value of L1-SINR may be determined with reference to the second table.
- CSI reporting is performed by dropping at least one of L1-RSRP and L1-SINR.
- the bit value of L1-SINR may be determined with reference to the first table.
- FIG. 6 is a diagram showing an example of a resource for CSI measurement and a resource for CSI reporting.
- the UE is set with a resource for L1-RSRP measurement having a 4-slot cycle starting from slot # 0. Further, the UE is set with the L1-RSRP reporting resource so that the L1-RSRP can be reported two slots after the slot of the L1-RSRP measurement resource.
- the L1-SINR measurement resource may be set to be located at a different timing (for example, a different slot, a different symbol) from the L1-RSRP measurement resource, or may be located at the same (or overlapping) timing. It may be set. Further, the L1-SINR reporting resource may be set to be located at a different timing from the L1-RSRP reporting resource, or may be set to be located at the same (or overlapping) timing.
- the L1-SINR measurement resource may be included in the slot (# 1) adjacent to the slot (# 0) in which the L1-RSRP measurement resource is included.
- the L1-SINR measurement resource may be included in the same slot (# 8) as the slot in which the L1-RSRP measurement resource is included.
- the L1-SINR reporting resource may be included in the slot (# 3) adjacent to the slot (# 2) in which the L1-RSRP reporting resource is included.
- the L1-SINR reporting resource may be contained in the same slot (# 14) as the slot containing the L1-RSRP reporting resource.
- the corresponding L1-SINR and the corresponding L1-RSRP may be reported in the same slot or reported in different slots. May be done.
- the L1-SINR measurement resource and the L1-RSRP corresponding to the L1-SINR and L1-RSRP reported in these resources respectively.
- the measurement resource may be contained in the same slot or may be contained in a different slot.
- one resource and another resource are located at the same (or overlapping) timing may mean, for example, that the start symbols of these resources are the same, and these resources are at least in the time domain. It may mean partial overlap.
- the UE may be set with a plurality of CSI (multi CSI) reporting resources.
- CSI multi CSI reporting resources.
- the UE transmits both L1-SINR and L1-RSRP using the reporting resources of the plurality of CSIs. You may.
- the UE will report L1-RSRP and L1-SINR.
- One of the reporting resources may be used to transmit either L1-RSRP or L1-SINR and drop the other.
- L1-SINR reporting resource and the L1-RSRP reporting resource are included in the same slot may mean that these resources are included in the same slot of one component carrier (CC). , May mean that they are contained in the same slot of multiple CCs.
- the UE may drop at least one CSI report according to a given priority rule.
- the predetermined priority rule may be associated with a priority value for CSI reporting.
- the priority value may be defined using the function Pri iCSI (y, k, c, s).
- first CSI report No It may mean that it has a higher priority than the CSI report of 2.
- the priority value may be obtained based on another definition.
- C may be a serving cell index.
- s may be a setting ID (reportConfigID).
- N cells may be the value of the maximum number of serving cells to be set (upper layer parameter maxNrofServingCells).
- M s may be the maximum number of values of CSI report configuration which is set (upper layer parameter maxNrofCSI-ReportConfigurations).
- K may be a value based on whether or not the CSI report contains L1-RSRP, whether or not it contains L1-SINR, and the like.
- k may be set (specified) by upper layer signaling, physical layer signaling, or a combination thereof so as to have at least one of the following (A)-(C) priority relationships, or may be specified by specifications.
- the following values may be set or specified for k so as to satisfy at least one of the priority relationships (A)-(C) above:
- each k is just an example and is not limited to this.
- L1-RSRP beam-related reports
- L1-SINR beam-related reports
- beam-related reports can be reported with priority over other CSIs. Further, for example, L1-SINR can be reported with the highest priority in order to grasp the interference of a specific UE.
- the CSI used in the Rel-15 NR (L1-RSRP, etc.) can be reported in preference to the CSI used in the NR after Rel-16.
- the CSI used in Rel-15 NR is more important.
- the UE may be set with CSI report setting information (CSI-ReportConfig) including information about k.
- CSI-ReportConfig CSI report setting information
- k When k can be set, the priority relationship of (A)-(C) above for each CSI report can be controlled more flexibly.
- L1-RSRP and L1-SINR can be appropriately reported by CSI.
- the base station may control using a beam corresponding to the report reported by the UE (for example, a transmitting beam), or may control to determine a beam to be used based on the beam corresponding to the reported report. Good.
- the UE may report L1-SINR in addition to L1-RSRP for the selected beam, even when beam selection is performed based solely on L1-RSRP. By doing so, it is possible to provide a judgment material for determining the beam of the base station.
- wireless communication system Wireless communication system
- communication is performed using any one of the wireless communication methods according to each of the above-described embodiments of the present disclosure or a combination thereof.
- FIG. 7 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), etc. specified by Third Generation Partnership Project (3GPP). ..
- the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technology (RAT) (Multi-RAT Dual Connectivity (MR-DC)).
- MR-DC is a dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and a dual connectivity between NR and LTE (NR-E).
- -UTRA Dual Connectivity (NE-DC) may be included.
- the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)).
- the NR base station (gNB) is MN
- the LTE (E-UTRA) base station (eNB) is SN.
- the wireless communication system 1 has dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) May be supported.
- a plurality of base stations in the same RAT for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )
- NR-NR Dual Connectivity NR-DC
- gNB NR base stations
- the wireless communication system 1 includes a base station 11 that forms a macro cell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. You may prepare.
- the user terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminal 20 are not limited to the mode shown in the figure.
- the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.
- the user terminal 20 may be connected to at least one of the plurality of base stations 10.
- the user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation (CA)) and dual connectivity (DC) using a plurality of component carriers (Component Carrier (CC)).
- CA Carrier Aggregation
- DC dual connectivity
- CC Component Carrier
- 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.
- FR1 may be in a frequency band of 6 GHz or less (sub 6 GHz (sub-6 GHz)), and FR2 may be in a frequency band higher than 24 GHz (above-24 GHz).
- 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.
- the user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- the plurality of base stations 10 may be connected by wire (for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
- wire for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.
- NR communication for example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the higher-level station is the Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) is the IAB. It may be called a node.
- IAB Integrated Access Backhaul
- relay station relay station
- the base station 10 may be connected to the core network 30 via another base station 10 or directly.
- the core network 30 may include at least one such as Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).
- EPC Evolved Packet Core
- 5GCN 5G Core Network
- NGC Next Generation Core
- the user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.
- a wireless access method based on Orthogonal Frequency Division Multiplexing may be used.
- OFDM Orthogonal Frequency Division Multiplexing
- DL Downlink
- UL Uplink
- CP-OFDM Cyclic Prefix OFDM
- DFT-s-OFDM Discrete Fourier Transform Spread OFDM
- OFDMA Orthogonal Frequency Division Multiple. Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the wireless access method may be called a waveform.
- another wireless access system for example, another single carrier transmission system, another multi-carrier transmission system
- the UL and DL wireless access systems may be used as the UL and DL wireless access systems.
- downlink shared channels Physical Downlink Shared Channel (PDSCH)
- broadcast channels Physical Broadcast Channel (PBCH)
- downlink control channels Physical Downlink Control
- Channel PDCCH
- the uplink shared channel Physical Uplink Shared Channel (PUSCH)
- the uplink control channel Physical Uplink Control Channel (PUCCH)
- the random access channel shared by each user terminal 20 are used.
- Physical Random Access Channel (PRACH) Physical Random Access Channel or the like may be used.
- PDSCH User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH.
- User data, upper layer control information, and the like may be transmitted by the PUSCH.
- MIB Master Information Block
- PBCH Master Information Block
- Lower layer control information may be transmitted by PDCCH.
- the lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH.
- DCI Downlink Control Information
- the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc.
- the DCI that schedules PUSCH may be called UL grant, UL DCI, etc.
- the PDSCH may be read as DL data
- the PUSCH may be read as UL data.
- a control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used to detect the PDCCH.
- CORESET corresponds to a resource that searches for DCI.
- the search space corresponds to the search area and search method of PDCCH candidates (PDCCH candidates).
- One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a search space based on the search space settings.
- One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
- One or more search spaces may be referred to as a search space set.
- the "search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. of the present disclosure may be read as each other.
- channel state information (Channel State Information (CSI)
- delivery confirmation information for example, it may be called Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.
- scheduling request (Scheduling Request ( Uplink Control Information (UCI) including at least one of SR))
- the PRACH may transmit a random access preamble for establishing a connection with the cell.
- downlinks, uplinks, etc. may be expressed without “links”. Further, it may be expressed without adding "Physical" at the beginning of various channels.
- a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like may be transmitted.
- the DL-RS includes a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a demodulation reference signal (DeModulation).
- CRS Cell-specific Reference Signal
- CSI-RS Channel State Information Reference Signal
- DeModulation Demodulation reference signal
- Reference Signal (DMRS)), positioning reference signal (Positioning Reference Signal (PRS)), phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like may be transmitted.
- PRS Positioning Reference Signal
- PTRS Phase Tracking Reference Signal
- the synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- the signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SS Block (SSB) and the like.
- SS, SSB and the like may also be called a reference signal.
- a measurement reference signal Sounding Reference Signal (SRS)
- a demodulation reference signal DMRS
- UL-RS Uplink Reference Signal
- UE-specific Reference Signal UE-specific Reference Signal
- FIG. 8 is a diagram showing an example of the configuration of the base station according to the embodiment.
- the base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140.
- the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may each be provided with one or more.
- the functional blocks of the feature portion in the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
- the control unit 110 controls the entire base station 10.
- the control unit 110 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
- the control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping) and the like.
- the control unit 110 may control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
- the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 120.
- the control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, management of radio resources, and the like.
- the transmission / reception 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 transmission / reception unit 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like, which are described based on common recognition in the technical fields according to the present disclosure. be able to.
- the transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
- the transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122.
- the receiving unit may be composed of a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.
- the transmitting / receiving antenna 130 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.
- the transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmission / reception unit 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.
- the transmission / reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission / reception unit 120 processes, for example, Packet Data Convergence Protocol (PDCP) layer processing and Radio Link Control (RLC) layer processing (for example, RLC) for data, control information, etc. acquired from control unit 110.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ retransmission control HARQ retransmission control
- the transmission / reception unit 120 performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) for the bit string to be transmitted.
- the base band signal may be output by performing processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, digital-analog conversion, and other transmission processing.
- IFFT inverse fast Fourier transform
- the transmission / reception unit 120 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 130. ..
- the transmission / reception unit 120 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 130.
- the transmission / reception unit 120 (reception processing unit 1212) performs analog-digital transformation, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) Processing (if necessary), filtering, demapping, demodulating, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing are applied. User data and the like may be acquired.
- FFT fast Fourier transform
- IDFT inverse discrete Fourier transform
- the transmission / reception unit 120 may perform measurement on the received signal.
- the measuring unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, or the like based on the received signal.
- the measuring unit 123 has received power (for example, Reference Signal Received Power (RSRP)) and reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)).
- RSRP Reference Signal Received Power
- RSSQ Reference Signal Received Quality
- SINR Signal to Noise Ratio
- Signal strength for example, Received Signal Strength Indicator (RSSI)
- propagation path information for example, CSI
- the measurement result may be output to the control unit 110.
- the transmission line interface 140 transmits and receives signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, and the like, and provides user data (user plane data) and control plane for the user terminal 20. Data or the like may be acquired or transmitted.
- the transmitting unit and the receiving unit of the base station 10 in the present disclosure may be composed of at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
- the transmission / reception unit 120 includes setting information (for example, RRC CSI-MeasConfig information element (Information Element (IE))) related to measurement (or measurement report or report) for channel state information (Channel State Information (CSI)). At least one of CSI-ResourceConfig IE, CSI-ReportConfig IE, etc.) may be transmitted to the user terminal 20.
- the transmission / reception unit 103 may receive the CSI transmitted from the user terminal 20.
- the transmission / reception unit 120 may transmit information regarding the beam selection index (for example, "beam selection criteria" or "report Quantity" of RRC) to the user terminal 20.
- the transmission / reception unit 103 may receive the CSI transmitted from the user terminal 20.
- the control unit 110 may determine the beam to be used by the base station 10 or the user terminal 20 based on the CSI (beam report) from the user terminal 20.
- the transmission / reception unit 120 has a first setting including a parameter (for example, RRC parameter “reportQuantity”) of the report amount of channel state information indicating the report of the signal-to-interference noise ratio (Signal to Interference plus Noise Ratio (SINR)).
- a parameter for example, RRC parameter “reportQuantity”
- SINR Signal-to-interference noise ratio
- Information for example, the RRC information element "CSI-ReportConfig" may be transmitted to the user terminal 20.
- FIG. 9 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
- the user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230.
- the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided with one or more.
- this example mainly shows the functional blocks of the feature portion in the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
- the control unit 210 controls the entire user terminal 20.
- the control unit 210 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
- the control unit 210 may control signal generation, mapping, and the like.
- the control unit 210 may control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230.
- the control unit 210 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 220.
- the transmission / reception unit 220 may include a baseband unit 221 and 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 transmission / reception unit 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like, which are described based on common recognition in the technical fields according to the present disclosure.
- the transmission / reception unit 220 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
- the transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222.
- the receiving unit may be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.
- the transmitting / receiving antenna 230 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.
- the transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.
- the transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission / reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), and MAC layer processing (for example, for data, control information, etc. acquired from the control unit 210). , HARQ retransmission control), etc., to generate a bit string to be transmitted.
- RLC layer processing for example, RLC retransmission control
- MAC layer processing for example, for data, control information, etc. acquired from the control unit 210.
- HARQ retransmission control HARQ retransmission control
- the transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (may include error correction coding), modulation, mapping, filtering processing, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed to output the baseband signal.
- Whether or not to apply the DFT process may be based on the transform precoding setting.
- the transmission / reception unit 220 transmission processing unit 2211 described above for transmitting a channel (for example, PUSCH) using the DFT-s-OFDM waveform when the transform precoding is enabled.
- the DFT process may be performed as the transmission process, and if not, the DFT process may not be performed as the transmission process.
- the transmission / reception unit 220 may perform modulation, filtering, amplification, etc. to the radio frequency band on the baseband signal, and transmit the signal in the radio frequency band via the transmission / reception antenna 230. ..
- the transmission / reception unit 220 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 230.
- the transmission / reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, and decoding (error correction) for the acquired baseband signal. Decoding may be included), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
- the transmission / reception unit 220 may perform measurement on the received signal.
- the measuring unit 223 may perform RRM measurement, CSI measurement, or the like based on the received signal.
- the measuring unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like.
- the measurement result may be output to the control unit 210.
- the transmitter and receiver of the user terminal 20 in the present disclosure may be composed of at least one of the transmitter / receiver 220 and the transmitter / receiver antenna 230.
- the transmission / reception unit 220 may receive information regarding the beam selection index (for example, "beam selection criteria" or "report Quantity" of RRC).
- the transmission / reception unit 203 may transmit a CSI including information (L1-RSRP, L1-SINR, etc.) regarding interference based on the above measurement to the base station 10.
- the control unit 210 may perform beam selection based on the index specified by the information regarding the beam selection index.
- the control unit 210 may use the setting information of the report amount of the channel state information (for example, “report Quantity” of RRC) as the information regarding the beam selection index.
- the control unit 210 selects the measurement result of the first number (for example, M) based on one index (for example, L1-RSRP), and further selects the measurement result for the other.
- the measurement result of the second number (for example, "nrofReportedRS" of RRC) may be selected from the measurement result of the first number based on the index of (for example, L1-RSRQ or L1-SINR).
- the control unit 210 may control the reporting of SINR (csi-SINR / ssb-SINR) based on the setting information of the reporting amount of the channel state information (for example, “report Quantity” of RRC).
- the transmission / reception unit 220 is the first setting including a parameter (for example, RRC parameter "reportQuantity") of the report amount of the channel state information indicating the report of the signal-to-interference noise ratio (Signal to Interference plus Noise Ratio (SINR)).
- a parameter for example, RRC parameter "reportQuantity" of the report amount of the channel state information indicating the report of the signal-to-interference noise ratio (Signal to Interference plus Noise Ratio (SINR)).
- SINR Signal-to-interference noise ratio
- Information eg, RRC information element "CSI-ReportConfig" may be received.
- the control unit 210 includes a second setting information (another "report Quantity”) including a report amount parameter (for example, RRC parameter “reportQuantity”) of the channel state information indicating the report of the reference signal received power (RSRP).
- a report amount parameter for example, RRC parameter "reportQuantity”
- CSI-ReportConfig When receiving "CSI-ReportConfig"), control may be performed to report a predetermined number of the SINRs from the one with the larger value of the corresponding RSRP.
- control unit 210 may perform control to report the predetermined number of the SINRs from the one having the larger SINR value.
- the control unit 210 When the control unit 210 receives the second setting information, the control unit 210 has a correspondence relationship (for example, a table) in which the range of the difference value of the SINR of the predetermined number is limited to either 0 or less or 0 or more. ), The SINR information may be generated.
- a correspondence relationship for example, a table in which the range of the difference value of the SINR of the predetermined number is limited to either 0 or less or 0 or more.
- the control unit 210 reports the channel state information including the RSRP and the channel state information (for example, RI, CQI, PMI, etc.) specified in Release 15 New Radio (NR). ) May be controlled to be transmitted in preference to the report of the channel state information including the SINR.
- the channel state information including the RSRP and the channel state information (for example, RI, CQI, PMI, etc.) specified in Release 15 New Radio (NR).
- each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices.
- the functional block may be realized by combining the software with the one device or the plurality of devices.
- the functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
- a functional block (constituent unit) for functioning transmission may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
- the method of realizing each of them is not particularly limited.
- the base station, user terminal, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
- FIG. 10 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
- the base station 10 and the user terminal 20 described above 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, and the like. ..
- the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
- processor 1001 may be a plurality of processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by using other methods by two or more processors.
- the processor 1001 may be mounted by one or more chips.
- the processor 1001 For each function of the base station 10 and the user terminal 20, for example, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation and communicates via the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
- predetermined software program
- the processor 1001 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, and the like.
- CPU central processing unit
- control unit 110 210
- transmission / reception unit 120 220
- the like may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, 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 these.
- a program program code
- the control unit 110 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized in the same manner for other functional blocks.
- the memory 1002 is a computer-readable recording medium, for example, at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), or any other suitable storage medium. It may be composed of one.
- the memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
- the memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium, for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disc (Compact Disc ROM (CD-ROM)), a digital versatile disk, etc.). At least one of Blu-ray® disks, removable disks, hard disk drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers, and other suitable storage media. It may be composed of.
- the storage 1003 may be referred to as an auxiliary storage device.
- the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)). It may be configured to include.
- the transmission / reception unit 120 (220), the transmission / reception antenna 130 (230), and the like described above may be realized by the communication device 1004.
- the transmission / reception unit 120 (220) may be physically or logically separated from the transmission unit 120a (220a) and the reception unit 120b (220b).
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside.
- the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
- each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information.
- the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
- the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like. It may be configured to include hardware, and a part or all of each functional block may be realized by using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
- DSP Digital Signal Processor
- ASIC Application Specific Integrated Circuit
- PLD Programmable Logic Device
- FPGA Field Programmable Gate Array
- the terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings.
- channels, symbols and signals may be read interchangeably.
- the signal may be a message.
- the reference signal may also be abbreviated as RS, and may be referred to as a pilot, a pilot signal, or the like depending on the applied standard.
- the component carrier (Component Carrier (CC)) may be referred to as a cell, a frequency carrier, a carrier frequency, or the like.
- the wireless frame may be composed of one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) constituting the wireless frame may be referred to as a subframe.
- the subframe may be composed of one or more slots in the time domain.
- the subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.
- the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel.
- Numerology includes, for example, subcarrier spacing (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, and wireless frame configuration.
- SCS subcarrier Spacing
- TTI Transmission Time Interval
- a specific filtering process performed by the transmitter / receiver in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
- the slot may be composed of one or more symbols (Orthogonal Frequency Division Multiple Access (OFDMA) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain.
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the slot may be a time unit based on numerology.
- the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. Further, the mini slot may be called a sub slot. A minislot may consist of a smaller number of symbols than the slot.
- a PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as a PDSCH (PUSCH) mapping type A.
- the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.
- the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
- the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
- the time units such as frames, subframes, slots, mini slots, and symbols in the present disclosure may be read as each other.
- one subframe may be called TTI
- a plurality of consecutive subframes may be called TTI
- one slot or one minislot may be called TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be.
- the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
- the base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units.
- the definition of TTI is not limited to this.
- the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
- the time interval for example, the number of symbols
- the transport block, code block, code word, etc. may be shorter than the TTI.
- one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be referred to as 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, or the like.
- TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.
- the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
- a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
- the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
- the number of subcarriers contained in the RB may be determined based on numerology.
- the RB may include one or more symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe or 1 TTI.
- Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
- one or more RBs are a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, and an RB. It may be called a pair or the like.
- PRB Physical RB
- SCG sub-carrier Group
- REG resource element group
- PRB pair an RB. It may be called a pair or the like.
- the resource block may be composed of one or a plurality of resource elements (Resource Element (RE)).
- RE Resource Element
- 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
- Bandwidth Part (which may also be called partial bandwidth) represents a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. May be good.
- the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- the BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
- BWP UL BWP
- BWP for DL DL BWP
- One or more BWPs may be set in one carrier for the UE.
- At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP.
- “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
- the above-mentioned structures such as wireless frames, subframes, slots, mini slots, and symbols are merely examples.
- the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
- the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
- the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, radio resources may be indicated by a given index.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
- information, signals, etc. can be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layers.
- Information, signals, etc. may be input / output via a plurality of network nodes.
- the input / output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, signals, etc. can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.
- the notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using another method.
- the notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (DCI)), uplink control information (Uplink Control Information (UCI))), and higher layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (master information block (MIB), system information block (SIB), etc.), medium access control (MAC) signaling), other signals or combinations thereof May be carried out by.
- DCI downlink control information
- UCI Uplink Control Information
- RRC Radio Resource Control
- MIB master information block
- SIB system information block
- MAC medium access control
- the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like.
- the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
- MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).
- CE MAC Control Element
- the notification of predetermined information is not limited to the explicit notification, but implicitly (for example, by not notifying the predetermined information or another information). May be done (by notification of).
- the determination may be made by a value represented by 1 bit (0 or 1), or by a boolean value represented by true or false. , May be done by numerical comparison (eg, comparison with a given value).
- Software is an instruction, instruction set, code, code segment, program code, program, subprogram, software module, whether called software, firmware, middleware, microcode, hardware description language, or another name.
- Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc. should be broadly interpreted to mean.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- a transmission medium For example, a website where software uses at least one of wired technology (coaxial cable, fiber optic cable, twist pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.).
- wired technology coaxial cable, fiber optic cable, twist pair, digital subscriber line (DSL), etc.
- wireless technology infrared, microwave, etc.
- Network may mean a device (eg, a base station) included in the network.
- precoding "precoding weight”
- QCL Quality of Co-Co-Location
- TCI state Transmission Configuration Indication state
- space "Spatial relation”, “spatial domain filter”, “transmission power”, “phase rotation”, "antenna port”, “antenna port group”, “layer”, “number of layers”
- Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, "antenna”, “antenna element", “panel” are compatible.
- Base station BS
- radio base station fixed station
- NodeB NodeB
- eNB eNodeB
- gNB gNodeB
- Access point "Transmission point (Transmission Point (TP))
- RP Reception point
- TRP Transmission / Reception Point
- Panel , "Cell”, “sector”, “cell group”, “carrier”, “component carrier” and the like
- Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
- the base station can accommodate one or more (for example, three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio)).
- Communication services can also be provided by Head (RRH))).
- RRH Head
- the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage.
- MS mobile station
- UE user equipment
- terminal terminal
- Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , Handset, user agent, mobile client, client or some other suitable term.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like.
- At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
- the moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be.
- at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
- at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read by the user terminal.
- communication between a base station and a user terminal has been replaced with communication between a plurality of user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
- D2D Device-to-Device
- V2X Vehicle-to-Everything
- Each aspect / embodiment of the present disclosure may be applied to the configuration.
- the user terminal 20 may have the function of the base station 10 described above.
- words such as "up” and “down” may be read as words corresponding to inter-terminal communication (for example, "side").
- the uplink, downlink, and the like may be read as side channels.
- the user terminal in the present disclosure may be read as a base station.
- the base station 10 may have the functions of the user terminal 20 described above.
- the operation performed by the base station may be performed by its upper node (upper node) in some cases.
- various operations performed for communication with a terminal are performed by the base station and one or more network nodes other than the base station (for example,).
- Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. can be considered, but it is not limited to these), or it is clear that it can be performed by a combination thereof.
- each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution.
- the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction.
- the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- SUPER 3G IMT-Advanced
- 4G 4th generation mobile communication system
- 5G 5th generation mobile communication system
- Future Radio Access FAA
- New-Radio Access Technology RAT
- NR New Radio
- NX New radio access
- Future generation radio access FX
- GSM Global System for Mobile communications
- CDMA2000 Code Division Multiple Access
- UMB Ultra Mobile Broadband
- IEEE 802.11 Wi-Fi (registered trademark)
- LTE 802.16 WiMAX (registered trademark)
- a plurality of systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).
- references to elements using designations such as “first”, “second”, etc. as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted or that the first element must somehow precede the second element.
- determining used in this disclosure may include a wide variety of actions.
- judgment (decision) means judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry) ( For example, searching in a table, database or another data structure), ascertaining, etc. may be considered to be "judgment”.
- judgment (decision) means receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), access (for example). It may be regarded as “judgment (decision)" of "accessing” (for example, accessing data in memory).
- judgment (decision) is regarded as “judgment (decision)” of solving, selecting, choosing, establishing, comparing, and the like. May be good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of some action.
- connection are any direct or indirect connections or connections between two or more elements. Means, and can include the presence of one or more intermediate elements between two elements that are “connected” or “joined” to each other.
- the connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
- the radio frequency domain microwaves. It can be considered to be “connected” or “coupled” to each other using frequency, electromagnetic energy having wavelengths in the light (both visible and invisible) regions, and the like.
- the term "A and B are different” may mean “A and B are different from each other”.
- the term may mean that "A and B are different from C”.
- Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
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Abstract
Description
NRにおいては、UEは、所定の参照信号(又は、当該参照信号用のリソース)を用いてチャネル状態を測定し、チャネル状態情報(Channel State Information(CSI))を基地局にフィードバック(報告)する。
これまでRel-15 NRにおいては、ビーム管理(Beam Management(BM))の方法が検討されてきた。当該ビーム管理においては、UEが報告したL1-RSRPをベースに、ビーム選択(beam selection)を行うことが検討されている。ある信号/チャネルのビームを変更する(切り替える)ことは、当該信号/チャネルのTransmission Configuration Indication state(TCI状態)を変更することに相当してもよい。
<第1の実施形態>
第1の実施形態は、ビーム選択の設定に関する。
・L1-RSRP、
・L1-SINR、
・L1-RSRP及びL1-SINR。
・csi-RSRP、
・ssb-RSRP、
・csi-SINR、
・ssb-SINR、
・csi-RSRP及びcsi-SINR、
・ssb-RSRP及びssb-SINR。
第2の実施形態は、SINRを報告させるための報告量の設定に関する。
・csi-SINR(「cri-SINR」設定時)、
・ssb-SINR(「ssb-Index-SINR」設定時)。
・低遅延ビーム選択(又は測定又は報告)を行う、
・低オーバヘッドビーム選択(又は測定又は報告)を行う、
・セカンダリセルでビーム障害回復を行う、
・ビーム障害回復に干渉測定結果(例えば、SINR)を用いる、
・ビーム選択に干渉測定結果(例えば、SINR)を用いる、
・ビーム報告に干渉測定結果(例えば、SINR)を含める。
第3の実施形態は、L1-RSRP及びL1-SINRの報告の設定に関する。
(1)L1-SINRの値が大きい方からX個のL1-SINRを報告する、
(2)対応するL1-RSRPの値が大きい方からX個のL1-SINRを報告する、
(3)L1-RSRPを報告量として設定する上位レイヤパラメータ(例えば、「reportQuantity」)が少なくとも1つ設定される場合、対応するL1-RSRPの値が大きい方からX個のL1-SINRを報告する、
(4)L1-RSRPを報告量として設定する上位レイヤパラメータ(例えば、「reportQuantity」)が1つも設定されない場合、L1-SINRの値が大きい方からX個のL1-SINRを報告する。
・当該L1-RSRP測定を示す「reportQuantity」を含むCSI報告設定情報(CSI-ReportConfig)に含まれる測定対象のCSIリソース設定ID(例えば、「resourcesForChannelMeasurement」、「csi-IM-ResourcesForInterference」、「nzp-CSI-RS-ResourcesForInterference」の少なくとも1つ)が、当該L1-SINR測定を示す「reportQuantity」を含む別のCSI報告設定情報(CSI-ReportConfig)に含まれる測定対象のCSIリソース設定ID(例えば、「resourcesForChannelMeasurement」、「csi-IM-ResourcesForInterference」、「nzp-CSI-RS-ResourcesForInterference」の少なくとも1つ)と同じである、
・当該L1-RSRPのための測定用リソース(例えば、SSB、CSI-RSなど)が、当該L1-SINRのための測定用リソース(例えば、SSB、CSI-RSなど)が、と同じ又は疑似コロケーション(Quasi-Co-Location(QCL))である。
CSI報告に含めるL1-SINRの値の表現方法について説明する。
図6は、CSI測定用リソース及びCSI報告用リソースの一例を示す図である。本例において、UEは、スロット#0を起点とした4スロット周期のL1-RSRP測定用リソースを設定されている。また、UEは、L1-RSRP測定用リソースのスロットから2スロット後にL1-RSRPを報告できるように、L1-RSRP報告用リソースを設定されている。
(A)L1-RSRPを含むCSI報告>L1-SINRを含むCSI報告>その他のCSI報告(L1-RSRP及びL1-SINRの両方を含まないCSI報告)、
(B)L1-SINRを含むCSI報告>L1-RSRPを含むCSI報告>その他のCSI報告(L1-RSRP及びL1-SINRの両方を含まないCSI報告)、
(C)L1-RSRPを含むCSI報告>Rel-15 NRで規定されるその他のCSI報告(例えば、RI、PMIなどを含むCSI報告)>L1-SINRを含むCSI報告>Rel-16以降のNRで規定されるその他のCSI報告。
(A)L1-RSRPを含むCSI報告のk=0、
L1-SINRを含むCSI報告のk=1、
L1-RSRP及びL1-SINRの両方を含まないCSI報告のk=2、
(B)L1-SINRを含むCSI報告のk=0(又はk=-1)、
L1-RSRPを含むCSI報告のk=1(又はk=0)、
L1-RSRP及びL1-SINRの両方を含まないCSI報告のk=2(又はk=1)、
(C)L1-RSRPを含むCSI報告のk=0、
L1-RSRP及びL1-SINRの両方を含まない(Rel-15 NRの)CSI報告のk=1、
L1-SINRを含むCSI報告のk=2。
基地局は、UEから報告されたレポートに対応するビーム(例えば送信ビーム)を用いる制御を行ってもよいし、報告されたレポートに対応するビームに基づいて用いるビームを決定する制御を行ってもよい。
以下、本開示の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本開示の上記各実施形態に係る無線通信方法のいずれか又はこれらの組み合わせを用いて通信が行われる。
図8は、一実施形態に係る基地局の構成の一例を示す図である。基地局10は、制御部110、送受信部120、送受信アンテナ130及び伝送路インターフェース(transmission line interface)140を備えている。なお、制御部110、送受信部120及び送受信アンテナ130及び伝送路インターフェース140は、それぞれ1つ以上が備えられてもよい。
図9は、一実施形態に係るユーザ端末の構成の一例を示す図である。ユーザ端末20は、制御部210、送受信部220及び送受信アンテナ230を備えている。なお、制御部210、送受信部220及び送受信アンテナ230は、それぞれ1つ以上が備えられてもよい。
なお、上記実施形態の説明に用いたブロック図は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
なお、本開示において説明した用語及び本開示の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル、シンボル及び信号(シグナル又はシグナリング)は、互いに読み替えられてもよい。また、信号はメッセージであってもよい。参照信号(reference signal)は、RSと略称することもでき、適用される標準によってパイロット(Pilot)、パイロット信号などと呼ばれてもよい。また、コンポーネントキャリア(Component Carrier(CC))は、セル、周波数キャリア、キャリア周波数などと呼ばれてもよい。
Claims (5)
- 信号対干渉雑音比(Signal to Interference plus Noise Ratio(SINR))の報告を示すチャネル状態情報の報告量のパラメータを含む第1の設定情報を受信する受信部と、
参照信号受信電力(Reference Signal Received Power(RSRP))の報告を示すチャネル状態情報の報告量のパラメータを含む第2の設定情報を受信している場合、対応する前記RSRPの値が大きい方から所定の数の前記SINRを報告する制御を行う制御部と、を有することを特徴とするユーザ端末。 - 前記制御部は、前記第2の設定情報を受信していない場合、前記SINRの値が大きい方から前記所定の数の前記SINRを報告する制御を行うことを特徴とする請求項1に記載のユーザ端末。
- 前記制御部は、前記第2の設定情報を受信している場合、前記所定の数の前記SINRの差分値のレンジが0以下又は0以上のいずれか一方に限定された対応関係に基づいて、前記SINRの情報を生成することを特徴とする請求項1又は請求項2に記載のユーザ端末。
- 前記制御部は、複数のチャネル状態情報の報告が衝突する場合、前記RSRPを含むチャネル状態情報の報告及びリリース15 New Radio(NR)で規定されるチャネル状態情報の報告を、前記SINRを含むチャネル状態情報の報告より優先して送信するように制御することを特徴とする請求項1から請求項3のいずれかに記載のユーザ端末。
- 信号対干渉雑音比(Signal to Interference plus Noise Ratio(SINR))の報告を示すチャネル状態情報の報告量のパラメータを含む第1の設定情報を受信するステップと、
参照信号受信電力(Reference Signal Received Power(RSRP))の報告を示すチャネル状態情報の報告量のパラメータを含む第2の設定情報を受信している場合、対応する前記RSRPの値が大きい方から所定の数の前記SINRを報告する制御を行うステップと、を有することを特徴とするユーザ端末の無線通信方法。
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US17/603,135 US20220191726A1 (en) | 2019-04-19 | 2019-04-19 | User terminal and radio communication method |
JP2021514777A JP7181675B2 (ja) | 2019-04-19 | 2019-04-19 | 端末、無線通信方法、基地局及びシステム |
PCT/JP2019/016862 WO2020213163A1 (ja) | 2019-04-19 | 2019-04-19 | ユーザ端末及び無線通信方法 |
CN201980097371.7A CN114009091B (zh) | 2019-04-19 | 2019-04-19 | 用户终端以及无线通信方法 |
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