WO2020003443A1 - Équipement utilisateur et station de base radio - Google Patents

Équipement utilisateur et station de base radio Download PDF

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Publication number
WO2020003443A1
WO2020003443A1 PCT/JP2018/024613 JP2018024613W WO2020003443A1 WO 2020003443 A1 WO2020003443 A1 WO 2020003443A1 JP 2018024613 W JP2018024613 W JP 2018024613W WO 2020003443 A1 WO2020003443 A1 WO 2020003443A1
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Prior art keywords
csi
transmission
signal
information
unit
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English (en)
Japanese (ja)
Inventor
祐輝 松村
聡 永田
ホイリン リー
ジン ワン
ギョウリン コウ
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NTT Docomo Inc
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NTT Docomo Inc
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Priority to CN201880095145.0A priority Critical patent/CN112335282B/zh
Priority to PCT/JP2018/024613 priority patent/WO2020003443A1/fr
Publication of WO2020003443A1 publication Critical patent/WO2020003443A1/fr
Anticipated expiration legal-status Critical
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections

Definitions

  • the present disclosure relates to a user terminal and a radio base station in a next-generation mobile communication system.
  • LTE Long Term Evolution
  • LTE-A LTE Advanced, LTE @ Rel. 10, 11, 12, 13
  • LTE @ Rel. 8, 9 LTE @ Rel. 8, 9
  • a user terminal In an existing LTE system (for example, LTE@Rel.8-13), a user terminal (UE: User @ Equipment) periodically and / or aperiodically transmits channel state information (CSI: Channel @ State @ Information) to a base station. ).
  • the UE transmits CSI using an uplink control channel (PUCCH: Physical Uplink Control Channel) and / or an uplink shared channel (PUSCH: Physical Uplink Shared Channel).
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E-UTRAN Evolved Universal Universal Terrestrial Radio Access Network
  • DL transmission is performed from a plurality of transmission points.
  • an object of the present disclosure is to provide a user terminal and a radio base station that can appropriately perform CSI reporting for a plurality of transmission points.
  • a user terminal includes a receiving unit that receives at least one setting information, and the plurality of channel state information (CSI) respectively corresponding to the plurality of transmission points based on the at least one setting information. And a control unit for determining a report.
  • CSI channel state information
  • CSI reports for a plurality of transmission points can be appropriately performed.
  • FIGS. 1A and 1B are diagrams illustrating an example of NCJT.
  • 2A and 2B are diagrams illustrating an example of an RS configuration and PDSCH transmission at a plurality of transmission points.
  • FIG. 3 is a diagram illustrating an example of a CSI report of a multiple CSI process.
  • FIG. 4 is a diagram illustrating an example of a plurality of CSI report settings.
  • 5A and 5B are diagrams illustrating an example of CSI reports for a plurality of transmission points.
  • 6A to 6D are diagrams illustrating an example of a CSI report configuration for a plurality of transmission points.
  • 7A and 7B are diagrams illustrating an example of a CSI report configuration according to the first example.
  • FIGS. 8A and 8B are diagrams illustrating an example of a configuration of a channel measurement resource and an interference measurement resource according to the first example.
  • 9A and 9B are diagrams illustrating an example of the CSI report according to option 1 of the second aspect.
  • FIGS. 10A to 10C are diagrams illustrating an example of a CSI report according to option 2 of the second example.
  • FIG. 11 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment.
  • FIG. 12 is a diagram illustrating an example of the entire configuration of the wireless base station according to the embodiment.
  • FIG. 13 is a diagram illustrating an example of a functional configuration of the wireless base station according to the embodiment.
  • FIG. 14 is a diagram illustrating an example of the entire configuration of the user terminal according to the embodiment.
  • FIG. 15 is a diagram illustrating an example of a functional configuration of the user terminal according to the embodiment.
  • FIG. 16 is a diagram illustrating an example of a hardware configuration of the radio
  • the UE measures a channel state using a predetermined reference signal (or a resource for the reference signal).
  • the reference signal for channel state measurement may be called CSI-RS (Channel ⁇ State ⁇ Information-Reference ⁇ Signal) or the like.
  • CSI-RS Channel ⁇ State ⁇ Information-Reference ⁇ Signal
  • the UE measures the channel state using a signal other than the CSI-RS (for example, a synchronization signal / broadcast channel (SS / PBCH: Synchronization Signal / Physical Broadcast Channel) block, a synchronization signal, a demodulation reference signal, and the like). You may.
  • the CSI-RS resource may include at least one of non-zero power (NZP) CSI-RS and CSI-IM (Interference Management).
  • the SS / PBCH block is a block including a primary synchronization signal (PSS: Primary Synchronization Signal), a secondary synchronization signal (SSS: Secondary Synchronization Signal), and a PBCH, and may be called an SS block or the like.
  • the UE transmits the channel state information (CSI) at a predetermined timing based on a measurement result of a reference signal or the like to a base station (for example, BS (Base @ Station), transmission / reception point (TRP: Transmission / Reception @ Point), eNB (eNodeB). ), GNB (NR NodeB) or the like).
  • BS Base @ Station
  • TRP Transmission / Reception @ Point
  • eNB eNodeB
  • GNB NR NodeB
  • CSI includes 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).
  • CQI Channel Quality Indicator
  • PMI Precoding Matrix Indicator
  • CRI CSI-RS Resource Indicator
  • SSBRI SS / PBCH Block Indicator
  • layer identifier LI: Layer Indicator
  • rank RI rank identifier
  • L1-RSRP reference signal reception power (Layer 1 Reference Signal Received Power) in layer 1)
  • the first part of CSI may include information having a relatively small number of bits (for example, RI).
  • the second part of CSI may include information having a relatively large number of bits (for example, CQI) such as information determined based on CSI part 1.
  • CSI feedback methods include (1) periodic CSI (P-CSI: Periodic @ CSI) reporting, (2) aperiodic CSI (A-CSI: Aperiodic @ CSI) reporting, and (3) semi-permanent (half) Continuous, semi-persistent (Semi-Persistent) CSI reports (SP-CSI: Semi-Persistent @ CSI) reports are being studied.
  • P-CSI Periodic @ CSI
  • A-CSI Aperiodic @ CSI
  • SP-CSI Semi-Persistent @ CSI
  • the UE transmits information on resources for reporting at least one CSI of P-CSI, SP-CSI and A-CSI (which may be referred to as CSI report configuration information) to upper layer signaling, physical layer signaling (eg, The notification may be made using downlink control information (DCI: Downlink Control Information) or a combination thereof.
  • DCI Downlink Control Information
  • the upper layer signaling may be, for example, any of RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information, or a combination thereof.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • the MAC signaling may use, for example, a MAC control element (MAC CE (Control Element)), a MAC PDU (Protocol Data Unit), or the like.
  • the broadcast information includes, for example, a master information block (MIB: Master Information Block), a system information block (SIB: System Information Block), minimum system information (RMSI: Remaining Minimum System Information), and other system information (OSI: Other). System @ Information).
  • the CSI report setting information may include, for example, information on a report cycle, an offset, and the like, and may be expressed in a predetermined time unit (slot unit, subframe unit, symbol unit, and the like).
  • the CSI report configuration information may include a configuration ID (CSI-ReportConfigId), and a parameter such as a type of CSI reporting method (SP-CSI or not) and a reporting cycle may be specified by the configuration ID.
  • the CSI report configuration information may include information (CSI-ResourceConfigId) indicating which reference signal (or which reference signal resource) to use to report the measured CSI.
  • non-coherent DL for example, PDSCH
  • transmission in which non-coherent DL signals (or DL channels) are transmitted in cooperation from a plurality of transmission points may be referred to as NCJT (Non-Coherent ⁇ Joint ⁇ Transmission).
  • a transmission point may be read as a transmission / reception point (Transmission / Reception @ Point: TRP), a panel (panel, an antenna panel, a plurality of antenna elements), an antenna port, or a cell.
  • the transmission point can be replaced with, for example, a beam, a spatial filter, a reference signal (RS) resource, a quasi co-location (QCL), a transmission configuration information (TCI), or a concept of grouping them. .
  • DCIs Downlink Control Information
  • PDCCH downlink control channels
  • DCI Downlink Control Information
  • FIG. 1A shows a case where PDSCH (for example, PDSCH using NCJT) is transmitted from a plurality of panels to a UE
  • FIG. 1B shows PDSCH (for example, PDSCH using NCJT) from a plurality of transmission / reception points (TRP). Is transmitted to the UE.
  • PDSCH for example, PDSCH using NCJT
  • TRP transmission / reception points
  • the first DCI #A for scheduling the PDSCH transmitted from the transmission point #A and the second DCI #B for scheduling the PDSCH transmitted from the transmission point #B may be transmitted to the UE.
  • the plurality of transmission points may be connected via a wired or wireless interface.
  • the different transmission points (panel or TRP (Transmission / Reception ⁇ Point)) in Assumptions 1 and 2 have the same large-scale characteristics (large-scale-properties, large-scale-fading) of the channel (QCL (quasi-co-located)).
  • the large-scale characteristics include at least one of a delay spread, a Doppler spread, a Doppler shift, an average gain, an average delay, and a spatial reception parameter (Spatial Rx Parameter).
  • the spatial reception parameter may correspond to a reception beam (for example, a reception analog beam) of the UE, and the beam may be specified based on the spatial QCL.
  • the QCL and at least one element of the QCL may be read as sQCL (spatial @ QCL).
  • Assumption 1 assumes that the RS (Reference Signal) configuration and PDSCH transmission for different transmission points are transparent to the UE, as shown in FIG. 2A.
  • UE operation of CSI measurement and CSI report becomes a problem.
  • a problem is whether or not the current CSI feedback mechanism can be applied to CSI feedback (report) for a plurality of transmission points.
  • CSI feedback for different transmission points should be independent of each other. In this case, it is a problem whether or not the current CSI feedback mechanism can be applied, and if not, how to improve it.
  • CoMP Coordinated Multi-Point transmission / reception
  • LTE Long Term Evolution
  • CSI reporting based on multiple CSI processes is supported. For example, as shown in FIG. 3, a plurality of CSI processes are set in the UE. Different CSI processes may indicate CSI reports for different transmission points.
  • the CSI feedback framework in NR supports CSI measurement based on multiple CSI-RS resources. This CSI measurement may be applied to the CSI measurement for CoMP.
  • a plurality of CSI report settings (settings) # 1 to #n may indicate resource settings # 1 to #n, respectively.
  • Each resource configuration may include at least one multiple CSI-RS resource set.
  • Each CSI-RS resource set may include at least one CSI-RS resource.
  • the CSI feedback in Assumption 1 is the same for the UE as in the case of a single transmission point. If the RS configuration is not transmission point specific, whether it is from a different transmission point or not is transparent to the UE.
  • the CSI feedback may be in accordance with a setting by at least one of existing higher layer signaling (eg, RRC signaling) and physical layer signaling (eg, DCI).
  • At least one of the following cases 1 and 2 may be used for setting the CSI feedback.
  • ⁇ Plan 1> When the UE sets the same CSI report content (report amount) for different transmission points by higher layer signaling, the UE combines and feeds back CSI.
  • the UE In example # 1 shown in FIG. 5A, the UE is configured with an RS configuration for both panel # 1 and panel # 2 and reports CSI for both panel # 1 and panel # 2.
  • Example # 2 When the UE sets different CSI report contents for different transmission points by higher layer signaling, parameters such as a CSI offset may be different, and thus the UE feeds back CSI independently.
  • the UE is configured with an RS configuration for TRP # 1 and an RS configuration for TRP # 2, and sets CSI for TRP # 1 and CSI for TRP # 2; Report.
  • the UE may report CSI for TRP # 1 to TRP # 1, and may report CSI for TRP # 2 to TRP # 2.
  • the current CSI feedback framework supports both case 1 and case 2.
  • one CSI report configuration (RS configuration) for acquiring CSIs for a plurality of transmission points may be used as in example # 1 shown in FIG. 5A.
  • a plurality of CSI reporting configurations (RS configurations) for acquiring CSIs for a plurality of transmission points may be used as in Example # 2 illustrated in FIG. 5B.
  • RS configurations CSI reporting configurations
  • Example # 2 illustrated in FIG. 5B illustrated in FIG. 5B.
  • information such as higher layer signaling and CSI report may be redundant.
  • the RS configuration is higher than the CSI report amount (report @ quantity) and the report configuration type (indicating one of P-CSI, SP-CSI, and A-CSI). It is configured transparently for the UE using layer signaling. In other words, the UE does not know whether the CSI report is used for different transmission points or the same transmission point.
  • the CSI parameter set may include CRI, RI, PMI, CQI.
  • the upper layer parameters (RRC information elements) of the CSI report configuration (CSI-ReportConfig) corresponding to Example # 1 include channel measurement (channel @ measurement: CM) resources (resourceForChannelMeasurement) and interference measurement (interference).
  • Example # 2 corresponding to Case 2 as shown in FIG. 6C, two CSI parameter sets are set in the UE for CSI reports for two transmission points (TRP).
  • TRP transmission points
  • each of the upper layer parameters of the two CSI report configurations (CSI-ReportConfig # 1 and CSI-ReportConfig # 2) corresponding to Example # 2 is the same as the CSI report configuration of Example # 1. May be included.
  • CSI reporting not all parameters of CSI need to be set in the UE. For example, when the number of CSI-RS resources is 1, CRI (CSI-RS @ resource @ indicator) is not required.
  • the CSI for each transmission point is not transparent to each UE. Similar to Assumption 1, for example, when RSs are independently set to UEs for all transmission points due to different CSI-RS resource settings, whether the CSI feedback is one packet or multiple packets is determined by: According to the upper layer signaling setting.
  • the UE may perform CSI feedback using the existing CSI feedback framework according to Case 1 or Case 2 similar to Assumption 1.
  • assumption 2 is likely to require a plurality of CSI report settings in the case of a plurality of transmission points, as shown in FIG. 5B.
  • the setting information of higher layer signaling may be redundant. is there. Further, as described above, even in the case where a plurality of independent CSI reports are set for a plurality of transmission points in Assumption 2, the CSI reports may be redundant.
  • the present inventors determine that a user terminal determines a plurality of CSI reports respectively corresponding to a plurality of transmission points based on at least one configuration information, thereby reducing at least one overhead of a CSI configuration and a CSI report. I thought about keeping it down.
  • Interference and “interference power” may be interchanged with each other.
  • Interference may be read as SINR, SNR, RSRQ, RSSI, or another index related to interference.
  • the resources for interference measurement include IMR (Interference Measurement Resource), CSI-IM (Interference Measurement) resource, zero power (ZP: Zero Power) CSI-RS resource, and non-zero power (NZP: Non-Zero Power). It may be replaced with at least one of CSI-RS resource, SS / PBCH block resource, and the like.
  • the transmission point and the TRP may be read on a panel. That is, TRP # 1 and # 2 may be different panels # 1 and # 2.
  • the UE may determine a plurality of CSI reports respectively corresponding to a plurality of transmission points.
  • the UE may transmit a CSI report for each transmission point to a corresponding transmission point, to a configured transmission point, or to a plurality of transmission points.
  • the UE may transmit the CSI report using PUCCH, PUSCH, or other uplink channels.
  • the UE may be configured with one CSI reporting configuration.
  • the CSI reporting configuration may include a common parameter having one information element and an individual parameter having N information elements.
  • the N information elements of the individual parameters may correspond to the N transmission points, respectively.
  • the common parameter may be common to the N transmission points.
  • the UE may perform CSI measurement and CSI reporting for each transmission point using the common parameters and the individual parameters corresponding to the transmission points.
  • RS resource configuration based on the same RS configuration (RS resource configuration), a plurality of reportQuantities and a plurality of reportConfigTypes may be set in the UE.
  • the RS configuration (resource) is common to the two sets (reportQuantity, reportConfigType).
  • the measurement quantity requirement (reportQuantity) may be different, or the report configuration type (reportConfigType) may be different.
  • Example 1-2> As shown in FIG. 7B, based on the same RS configuration, multiple reportQuantities, multiple reportConfigTypes, and multiple ResourcesForInterference may be set in the UE.
  • the resources of the channel measurement RS are common to the two sets (reportQuantity, reportConfigType, ResourcesForInterference).
  • the requirement of the measurement amount (report amount, reportQuantity) may be different
  • the report configuration type (reportConfigType) may be different
  • the interference measurement resource may be different.
  • Example 1-1 the RS configuration including the channel measurement RS and the interference measurement RS is the same, and a case where reportQuantity is different, or a plurality of reportQuantities (for example, a beam report and a CSI report) based on the same resource are expected. May be applied to cases.
  • Example 1-2 may be applied to a case where the channel measurement RS is the same and the interference measurement RS is different. In this case, the CSI report amounts (types) for different transmission points are not the same.
  • the UE determines the CSI parameters to be set in ReportQuantity # 1_1 and ReportQuantity # 1_2 based on the corresponding resource configuration. You may.
  • the UE If the UE is configured with only one CSI-ResourceConfig for channel measurement and only one CSI-ResourceConfig for interference measurement, the UE will have ReportQuantity # 1_1 and ReportQuantity # 1_2 with the same CSI parameters May not be received (it is not necessary to expect to receive).
  • the UE will use the same channel measurement resource as shown in FIG. 8A. A corresponding plurality of interference measurement resources may be assumed.
  • the UE may perform CSI-ResourceConfig for channel measurement as shown in FIG. 8B. And the CSI-ResourceConfig for interference measurement may be assumed to correspond one-to-one.
  • a part is common, and at least one of other parameters (report amount, report configuration type, interference measurement resource) ) Can reduce overhead of upper layer parameters. Also, by setting at least one of the report amount, the report configuration type, and the resource for interference measurement individually for the transmission point, the CSI report can be flexibly set.
  • the UE may independently feedback some or all of the CSI for each transmission point. Also, the UE may feed back CSI for different transmission points in at least partially different ways.
  • the UE may be configured for a CSI reporting configuration for each transmission point.
  • the UE may perform CSI measurement and CSI reporting for each transmission point using the corresponding CSI reporting configuration.
  • the CSI report for the first transmission point may depend on the CSI report for the second transmission point.
  • a CSI report for a second transmission point may supplement a CSI report for a first transmission point.
  • the second transmission point may receive the CSI report for the first transmission point from the first transmission point or may receive the CSI report from the UE.
  • At least one of the following options 1 and 2 may be used.
  • the UE may configure and report a differential CSI for one transmission point in a multiple transmission point scenario.
  • the UE feeds back complete CSI parameters for TRP # 1, and for TRP # 2, the CSI parameters for TRP # 2 with respect to the CSI parameters for TRP # 1.
  • the difference CSI parameter may be fed back.
  • the difference CSI parameter may be an offset or a ratio of the CSI parameter for TRP # 1 to the CSI parameter for TRP # 1.
  • the size of the differential CSI parameter may be smaller than the size of the full CSI parameter.
  • some CSI parameters may be differential CSI parameters, and other CSI parameters may be full CSI parameters.
  • the NW may acquire the complete CSI parameter of the second transmission point based on the complete CSI parameter of the first transmission point and the differential CSI parameter of the second transmission point.
  • a new reportQuantity option may be added to the specification.
  • a set of CRI, RI, PMI, and CQI difference values (CRI-RI-PMI-CQI-differential)
  • a set of RI, PMI, and CQI difference values (RI-PMI- At least one of CQI-differential) and CQI-differential only (CQI-differential) may be included in the report amount options.
  • the overhead of CSI feedback can be reduced as compared with the case where the complete CSI parameter is fed back to each transmission point.
  • the UE may be configured and reported different CSI parameters for different transmission points.
  • the UE may provide, for one transmission point, several CSI parameters common to multiple transmission points (eg, CRI only, CRI and RI set, CRI and RI and PMI set, RI only, RI and PMI set). Also, the UE may report a transmission point-specific CSI parameter for each transmission point.
  • several CSI parameters common to multiple transmission points eg, CRI only, CRI and RI set, CRI and RI and PMI set, RI only, RI and PMI set.
  • the UE may report a transmission point-specific CSI parameter for each transmission point.
  • the NW may obtain a complete CSI parameter set for each transmission point by combining multiple CSI parameter sets for multiple transmission points.
  • a plurality of CSI parameter sets for a plurality of transmission points may be at least one of the following Example 2-1 and Example 2-2.
  • a set of CRI, RI, PMI, and CQI is set in the UE as a CSI report for TRP # 1, and a set of PMI and CQI is set in the UE as a CSI report for TRP # 2. May be set.
  • CRI and RI may be parameters common to TRP # 1 and TRP # 2.
  • the PMI and CQI may be individual parameters for TRP # 1 and TRP # 2.
  • the overhead of CSI feedback can be reduced as compared with the case where the complete CSI parameter set is fed back to each transmission point.
  • CSI parameters common to multiple transmission points can facilitate coordination between transmission points.
  • a new reportQuantity option may be added to the specification. For example, as shown in FIG. 10C, at least one of the CQI only (CQI), the PMI and CQI set (PMI-CQI), the RI and the PMI and CQI set (RI-PMI-CQI) is included in the report amount options. It may be.
  • UE sets upper layer parameter ReportQuantity set to only PMI and CQI (PMI-CQI) or only to the difference between CRI and RI and PMI and CQI (CRI-RI-PMI-CQI-differential) for all report settings. May not be assumed to be set (there is no need to expect to be set).
  • the UE may determine the CSI parameter on condition of the reported CRI and RI (CRI-RI).
  • the reported CRI-RI may include only the reported value of the CRI and the RI.
  • the UE shall report the reported CRI and RI and PMI (CRI-RI-PMI) or the reported CRI and RI (CRI- RI) may be used as a condition to determine the CSI parameter.
  • the reported CRI-RI-PMI may include a reported value of the CRI and the RI and the PMI.
  • the UE shall report the reported CRI and RI and PMI And CQI (CRI-RI-PMI-CQI) as conditions.
  • the reported CRI-RI-PMI may include the reported value of the CRI and the RI, the PMI, and the CQI.
  • the second aspect it is possible to reduce the overhead of CSI feedback as compared with a case where a complete CSI parameter set is fed back to each transmission point.
  • wireless communication system Wireless communication system
  • communication is performed using any of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.
  • FIG. 11 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment.
  • the wireless communication system 1 at least one of carrier aggregation (CA) and dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a system bandwidth (for example, 20 MHz) of the LTE system as one unit is integrated. Can be applied.
  • CA carrier aggregation
  • DC dual connectivity
  • the wireless communication system 1 includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G. (5th generation mobile communication system), NR (New Radio), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or a system for realizing these.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-B LTE-Beyond
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • NR New Radio
  • FRA Full Radio Access
  • New-RAT Radio Access Technology
  • the radio communication system 1 includes a radio base station 11 forming a macro cell C1 having a relatively wide coverage, and a radio base station 12 (12a-12c) arranged in the macro cell C1 and forming a small cell C2 smaller than the macro cell C1. , Is provided. Further, user terminals 20 are arranged in the macro cell C1 and each small cell C2. The arrangement, number, and the like of each cell and the user terminals 20 are not limited to the modes shown in the figure.
  • the user terminal 20 can be connected to both the radio base station 11 and the radio base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 simultaneously using CA or DC. Further, the user terminal 20 may apply CA or DC using a plurality of cells (CCs).
  • CCs cells
  • Communication between the user terminal 20 and the radio base station 11 can be performed using a carrier having a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth (also referred to as an existing carrier or a legacy carrier).
  • a carrier having a relatively high frequency band for example, 3.5 GHz, 5 GHz or the like
  • the same carrier as that between may be used.
  • the configuration of the frequency band used by each wireless base station is not limited to this.
  • the user terminal 20 can perform communication in each cell using at least one of time division duplex (TDD: Time Division Duplex) and frequency division duplex (FDD: Frequency Division Duplex).
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • a single numerology may be applied, or a plurality of different numerologies may be applied.
  • Numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel, for example, subcarrier interval, bandwidth, symbol length, cyclic prefix length, subframe length, At least one of a TTI length, the number of symbols per TTI, a radio frame configuration, a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like may be indicated.
  • a communication parameter applied to at least one of transmission and reception of a certain signal or channel for example, subcarrier interval, bandwidth, symbol length, cyclic prefix length, subframe length, At least one of a TTI length, the number of symbols per TTI, a radio frame configuration, a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like may be indicated.
  • the subcarrier interval and the number of OFDM symbols of constituent OFDM symbols may be referred to as different numerology.
  • the wireless base station 11 and the wireless base station 12 are connected by wire (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface, or the like) or wirelessly. May be done.
  • the wireless base station 11 and each wireless base station 12 are connected to the upper station device 30 and connected to the core network 40 via the upper station device 30.
  • the higher station apparatus 30 includes, for example, an access gateway apparatus, a radio network controller (RNC), and a mobility management entity (MME), but is not limited thereto.
  • RNC radio network controller
  • MME mobility management entity
  • each wireless base station 12 may be connected to the higher station apparatus 30 via the wireless base station 11.
  • the radio base station 11 is a radio base station having relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like.
  • the wireless base station 12 is a wireless base station having local coverage, and includes a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), and transmission / reception. It may be called a point or the like.
  • the wireless base stations 11 and 12 are not distinguished, they are collectively referred to as a wireless base station 10.
  • Each user terminal 20 is a terminal corresponding to various communication systems such as LTE and LTE-A, and may include not only mobile communication terminals (mobile stations) but also fixed communication terminals (fixed stations).
  • Orthogonal Frequency Division Multiple Access (OFDMA) is applied to the downlink as a wireless access method, and Single Carrier-Frequency Division Multiple Access (SC-FDMA: Single Carrier) is applied to the uplink. At least one of Frequency Division Multiple Access) and OFDMA is applied.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier-Frequency Division Multiple Access
  • OFDMA is a multicarrier transmission scheme in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers), and data is mapped to each subcarrier to perform communication.
  • SC-FDMA divides a system bandwidth into bands each composed of one or a continuous resource block for each terminal, and a single carrier transmission that reduces interference between terminals by using different bands for a plurality of terminals. It is a method.
  • the uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.
  • a downlink shared channel (PDSCH: Physical Downlink Shared Channel), a broadcast channel (PBCH: Physical Broadcast Channel), a downlink control channel, or the like is used as a downlink channel.
  • the PDSCH transmits user data, upper layer control information, SIB (System Information Block), and the like.
  • SIB System Information Block
  • MIB Master ⁇ Information ⁇ Block
  • the downlink control channel includes PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel) and the like.
  • Downlink control information (DCI: Downlink Control Information) including scheduling information of at least one of the PDSCH and the PUSCH is transmitted by the PDCCH.
  • DCI for scheduling DL data reception may be referred to as DL assignment
  • DCI for scheduling UL data transmission may be referred to as UL grant.
  • PCFICH may transmit the number of OFDM symbols used for PDCCH.
  • the PHICH may transmit acknowledgment information (eg, retransmission control information, HARQ-ACK, ACK / NACK, etc.) of HARQ (Hybrid Automatic Repeat Repeat reQuest) for the PUSCH.
  • the EPDCCH is frequency-division multiplexed with a PDSCH (Downlink Shared Data Channel) and used for transmission of DCI and the like like the PDCCH.
  • PDSCH Downlink Shared Data Channel
  • an uplink shared channel (PUSCH: Physical Uplink Shared Channel), an uplink control channel (PUCCH: Physical Uplink Control Channel), a random access channel (PRACH: Physical Random Access Channel) or the like is used.
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PRACH Physical Random Access Channel
  • user data higher layer control information, etc. are transmitted.
  • downlink radio quality information CQI: Channel Quality Indicator
  • delivery confirmation information delivery confirmation information
  • scheduling request (SR: Scheduling Request), and the like are transmitted by PUCCH.
  • the PRACH transmits a random access preamble for establishing a connection with a cell.
  • a cell-specific reference signal CRS: Cell-specific Reference Signal
  • CSI-RS Channel State Information-Reference Signal
  • DMRS Demodulation Reference Signal
  • PRS Positioning Reference Signal
  • a measurement reference signal SRS: Sounding Reference Signal
  • DMRS demodulation reference signal
  • PRS Positioning Reference Signal
  • the transmitted reference signal is not limited to these.
  • FIG. 12 is a diagram illustrating an example of the entire configuration of the wireless base station according to the embodiment.
  • the wireless base station 10 includes a plurality of transmitting / receiving antennas 101, an amplifier unit 102, a transmitting / receiving unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
  • the transmitting / receiving antenna 101, the amplifier unit 102, and the transmitting / receiving unit 103 may be configured to include at least one each.
  • the baseband signal processing unit 104 regarding user data, processing of a PDCP (Packet Data Convergence Protocol) layer, division / combination of user data, transmission processing of an RLC layer such as RLC (Radio Link Control) retransmission control, and MAC (Medium Access) Control)
  • the transmission / reception unit performs retransmission control (for example, HARQ transmission processing), scheduling, transmission format selection, channel coding, inverse fast Fourier transform (IFFT) processing, precoding processing, and so on.
  • HARQ transmission processing for example, HARQ transmission processing
  • IFFT inverse fast Fourier transform
  • precoding processing precoding processing
  • the downlink control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and transferred to the transmission / reception unit 103.
  • the transmission / reception section 103 converts the baseband signal precoded and output from the baseband signal processing section 104 for each antenna into a radio frequency band, and transmits the radio frequency band.
  • the radio frequency signal frequency-converted by the transmitting / receiving section 103 is amplified by the amplifier section 102 and transmitted from the transmitting / receiving antenna 101.
  • the transmission / reception unit 103 can be configured from a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present disclosure. Note that the transmission / reception unit 103 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.
  • a radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102.
  • the transmitting / receiving section 103 receives the upstream signal amplified by the amplifier section 102.
  • Transmitting / receiving section 103 frequency-converts the received signal into a baseband signal and outputs the baseband signal to baseband signal processing section 104.
  • the baseband signal processing unit 104 performs fast Fourier transform (FFT: Fast Fourier Transform), inverse discrete Fourier transform (IDFT), and error correction on user data included in the input uplink signal. Decoding, reception processing of MAC retransmission control, reception processing of the RLC layer and PDCP layer are performed, and the data is transferred to the upper station apparatus 30 via the transmission path interface 106.
  • the call processing unit 105 performs call processing (setting, release, etc.) of a communication channel, state management of the wireless base station 10, management of wireless resources, and the like.
  • the transmission path interface 106 transmits and receives signals to and from the higher-level station device 30 via a predetermined interface.
  • the transmission path interface 106 transmits and receives signals (backhaul signaling) to and from another wireless base station 10 via an interface between base stations (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface). You may.
  • CPRI Common Public Radio Interface
  • X2 interface X2 interface
  • FIG. 13 is a diagram illustrating an example of a functional configuration of the wireless base station according to the embodiment. Note that, in this example, functional blocks of characteristic portions in the present embodiment are mainly shown, and it may be assumed that the wireless base station 10 also has other functional blocks necessary for wireless communication.
  • the baseband signal processing unit 104 includes at least a control unit (scheduler) 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305. Note that these configurations may be included in the radio base station 10, and some or all of the configurations need not be included in the baseband signal processing unit 104.
  • the control unit (scheduler) 301 controls the entire wireless base station 10.
  • the control unit 301 can be configured from a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present disclosure.
  • the control unit 301 controls, for example, signal generation in the transmission signal generation unit 302, signal assignment in the mapping unit 303, and the like. Further, the control unit 301 controls a signal reception process in the reception signal processing unit 304, a signal measurement in the measurement unit 305, and the like.
  • the control unit 301 performs scheduling (eg, resource allocation) of system information, a downlink data signal (eg, a signal transmitted using a downlink shared channel), and a downlink control signal (eg, a signal transmitted using a downlink control channel). ) Control. Further, control section 301 controls generation of a downlink control signal, a downlink data signal, and the like based on a result of determining whether or not retransmission control is required for an uplink data signal.
  • scheduling eg, resource allocation
  • a downlink data signal eg, a signal transmitted using a downlink shared channel
  • a downlink control signal eg, a signal transmitted using a downlink control channel
  • the control unit 301 controls scheduling of a synchronization signal (for example, PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)) and a downlink reference signal (for example, CRS, CSI-RS, DMRS).
  • a synchronization signal for example, PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)
  • a downlink reference signal for example, CRS, CSI-RS, DMRS.
  • the control unit 301 includes an uplink data signal (eg, a signal transmitted using an uplink shared channel), an uplink control signal (eg, a signal transmitted using an uplink control channel), a random access preamble, an uplink reference signal, and the like. Control scheduling.
  • Transmission signal generation section 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on an instruction from control section 301, and outputs the generated downlink signal to mapping section 303.
  • the transmission signal generation unit 302 can be configured from a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present disclosure.
  • the transmission signal generator 302 generates at least one of a DL assignment for notifying downlink data allocation information and a UL grant for notifying uplink data allocation information, based on an instruction from the controller 301, for example.
  • the DL assignment and the UL grant are both DCI and follow the DCI format.
  • the downlink data signal is subjected to an encoding process and a modulation process according to an encoding rate, a modulation scheme, and the like determined based on channel state information (CSI: Channel ⁇ State ⁇ Information) from each user terminal 20 and the like.
  • CSI Channel ⁇ State ⁇ Information
  • Mapping section 303 maps the downlink signal generated by transmission signal generating section 302 to a predetermined radio resource based on an instruction from control section 301, and outputs it to transmitting / receiving section 103.
  • the mapping unit 303 can be configured from a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present disclosure.
  • the reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, and the like) on the reception signal input from the transmission / reception unit 103.
  • the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20.
  • the reception signal processing unit 304 can be configured from a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present disclosure.
  • the reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301. For example, when a PUCCH including HARQ-ACK is received, HARQ-ACK is output to control section 301. In addition, reception signal processing section 304 outputs at least one of the reception signal and the signal after the reception processing to measurement section 305.
  • the measurement unit 305 performs measurement on the received signal.
  • the measurement unit 305 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present disclosure.
  • the measurement unit 305 may perform RRM (Radio Resource Management) measurement, CSI (Channel State Information) measurement, or the like based on the received signal.
  • the measurement unit 305 is configured to receive power (for example, RSRP (Reference Signal Received Power)), reception quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio, SNR (Signal to Noise Ratio)). , Signal strength (for example, RSSI (Received @ Signal @ Strength @ Indicator)), channel information (for example, CSI), and the like.
  • the measurement result may be output to the control unit 301.
  • the transmission / reception section 103 transmits setting information (for example, RSI CSI-MeasConfig information element (IE: Information @ Element)) related to measurement (or measurement report or report) for channel state information (CSI: Channel ⁇ State ⁇ Information), 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 103 transmits setting information (for example, RSI CSI-MeasConfig information element (IE: RRC)) related to at least one setting information (measurement (or measurement report or report) for channel state information (CSI: Channel ⁇ State ⁇ Information).
  • setting information for example, RSI CSI-MeasConfig information element (IE: RRC)
  • IE RRC
  • CSI-ResourceConfig @ IE CSI-ReportConfig @ IE, etc.
  • the transmission / reception unit 103 may receive at least one of the plurality of channel state information (CSI) reports respectively corresponding to the plurality of transmission points, which is transmitted based on the at least one setting information.
  • CSI channel state information
  • FIG. 14 is a diagram illustrating an example of the entire configuration of the user terminal according to the embodiment.
  • the user terminal 20 includes a plurality of transmitting / receiving antennas 201, an amplifier unit 202, a transmitting / receiving unit 203, a baseband signal processing unit 204, and an application unit 205.
  • the transmitting / receiving antenna 201, the amplifier unit 202, and the transmitting / receiving unit 203 may be configured to include at least one each.
  • the radio frequency signal received by the transmitting / receiving antenna 201 is amplified by the amplifier unit 202.
  • the transmission / reception unit 203 receives the downlink signal amplified by the amplifier unit 202.
  • the transmission / reception section 203 converts the frequency of the received signal into a baseband signal, and outputs the baseband signal to the baseband signal processing section 204.
  • the transmission / reception unit 203 can be configured from a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present disclosure. Note that the transmission / reception unit 203 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.
  • the baseband signal processing unit 204 performs FFT processing, error correction decoding, reception processing for retransmission control, and the like on the input baseband signal.
  • the downlink user data is transferred to the application unit 205.
  • the application unit 205 performs processing related to layers higher than the physical layer and the MAC layer. Also, of the downlink data, broadcast information may be transferred to the application unit 205.
  • uplink user data is input from the application unit 205 to the baseband signal processing unit 204.
  • the baseband signal processing unit 204 performs retransmission control transmission processing (eg, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like, and performs transmission / reception processing. Transferred to 203.
  • the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits the radio frequency band.
  • the radio frequency signal frequency-converted by the transmitting / receiving section 203 is amplified by the amplifier section 202 and transmitted from the transmitting / receiving antenna 201.
  • FIG. 15 is a diagram illustrating an example of a functional configuration of the user terminal according to the embodiment. Note that, in this example, functional blocks of characteristic portions in the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication.
  • the baseband signal processing unit 204 of the user terminal 20 includes at least a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. Note that these configurations need only be included in the user terminal 20, and some or all of the configurations need not be included in the baseband signal processing unit 204.
  • the control unit 401 controls the entire user terminal 20.
  • the control unit 401 can be configured by a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present disclosure.
  • the control unit 401 controls, for example, signal generation in the transmission signal generation unit 402, signal assignment in the mapping unit 403, and the like. Further, the control unit 401 controls signal reception processing in the reception signal processing unit 404, signal measurement in the measurement unit 405, and the like.
  • the control unit 401 acquires, from the reception signal processing unit 404, a downlink control signal, a downlink data signal, and the like transmitted from the wireless base station 10.
  • the control unit 401 controls generation of an uplink control signal, an uplink data signal, and the like based on the downlink control signal and the like as a result of determining whether retransmission control is required for the downlink data signal.
  • control unit 401 When the control unit 401 acquires various information notified from the radio base station 10 from the reception signal processing unit 404, the control unit 401 may update parameters used for control based on the information.
  • Transmission signal generating section 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) based on an instruction from control section 401 and outputs the generated signal to mapping section 403.
  • the transmission signal generation unit 402 can be configured from a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present disclosure.
  • the transmission signal generation unit 402 generates an uplink control signal related to acknowledgment information, channel state information (CSI), and the like, based on an instruction from the control unit 401, for example. Further, transmission signal generating section 402 generates an uplink data signal based on an instruction from control section 401. For example, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the downlink control signal notified from the radio base station 10 includes an UL grant.
  • CSI channel state information
  • Mapping section 403 maps the uplink signal generated by transmission signal generation section 402 to a radio resource based on an instruction from control section 401, and outputs the result to transmission / reception section 203.
  • the mapping unit 403 can be configured from a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present disclosure.
  • the reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, and decoding) on the reception signal input from the transmission / reception unit 203.
  • the received signal is, for example, a downlink signal (a downlink control signal, a downlink data signal, a downlink reference signal, etc.) transmitted from the radio base station 10.
  • the reception signal processing unit 404 can be configured from a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present disclosure.
  • the reception signal processing unit 404 can configure a reception unit according to the present disclosure.
  • the reception signal processing unit 404 outputs the information decoded by the reception processing to the control unit 401.
  • the reception signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401. Further, reception signal processing section 404 outputs at least one of the reception signal and the signal after the reception processing to measurement section 405.
  • the measurement unit 405 performs measurement on the received signal.
  • the measurement unit 405 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present disclosure.
  • the measurement unit 405 may constitute at least a part of the reception unit according to the present disclosure.
  • the measurement unit 405 may perform RRM measurement, CSI measurement, and the like based on the received signal.
  • the measurement unit 405 may measure reception power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), channel information (for example, CSI), and the like.
  • the measurement result may be output to the control unit 401.
  • the transmission / reception unit 203 transmits at least one set of setting information (measurement (or measurement report or report) for channel state information (CSI: Channel ⁇ State ⁇ Information) (for example, RSI CSI-MeasConfig information element (IE: Information @ Element), CSI-ResourceConfig @ IE, CSI-ReportConfig @ IE, etc.) may be received.
  • the measurement unit 405 may perform measurement based on the setting information.
  • the control unit 401 may determine a plurality of channel state information (CSI) reports respectively corresponding to a plurality of transmission points (for example, a TRP and a panel) based on the at least one setting information.
  • CSI channel state information
  • the transmission / reception unit 203 further includes a first parameter common to the plurality of transmission points (for example, including at least one of a channel measurement resource and an interference measurement resource) and a second parameter specific to the plurality of transmission points.
  • a first parameter common to the plurality of transmission points for example, including at least one of a channel measurement resource and an interference measurement resource
  • second parameter specific to the plurality of transmission points One piece of setting information including a parameter may be received (first mode).
  • the second parameter may indicate at least one of an interference measurement resource, a report amount, and a report configuration type.
  • the transmission / reception unit 203 may receive a plurality of setting information corresponding to the plurality of transmission points, respectively.
  • the first CSI report corresponding to the first transmission point may be dependent on the second CSI report corresponding to the second transmission point (second aspect).
  • the first CSI report may be a difference between a parameter corresponding to the first transmission point and a parameter corresponding to the second transmission point (second mode ⁇ option 1). Further, the second CSI report may include a parameter common to the first transmission point and the second transmission point (second mode option 2).
  • each functional block (components) are realized by an arbitrary combination of at least one of hardware and software.
  • a method for implementing each functional block is not particularly limited. That is, each functional block may be realized using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated from each other). , Wired, wireless, etc.) and using these multiple devices.
  • a wireless base station, a user terminal, or the like may function as a computer that performs processing of the wireless communication method according to the present disclosure.
  • FIG. 16 is a diagram illustrating an example of a hardware configuration of the radio base station and the user terminal according to the embodiment.
  • the above-described wireless 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, and the like. Good.
  • the term “apparatus” can be read as a circuit, a device, a unit, or the like.
  • the hardware configuration of the radio base station 10 and the user terminal 20 may be configured to include one or more devices shown in the drawing, or may be configured without including some devices.
  • processor 1001 may be implemented by one or more chips.
  • the functions of the radio base station 10 and the user terminal 20 are performed by, for example, reading predetermined software (program) on hardware, such as the processor 1001 and the memory 1002, so that the processor 1001 performs an arithmetic operation and the communication device 1004 via the communication device 1004. It is realized by controlling communication and controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
  • the processor 1001 controls the entire computer by operating an operating system, for example.
  • the processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
  • CPU Central Processing Unit
  • the above-described baseband signal processing unit 104 (204), call processing unit 105, and the like may be realized by the processor 1001.
  • the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to these.
  • a program program code
  • a program that causes a computer to execute at least a part of the operation described in the above embodiment is used.
  • the control unit 401 of the user terminal 20 may be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and other functional blocks may be similarly implemented.
  • the memory 1002 is a computer-readable recording medium, and includes, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically EPROM), a RAM (Random Access Memory), and other appropriate storage media. It may be constituted by one.
  • the memory 1002 may be called 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, and the like that can be executed to implement the wireless communication method according to an embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc) ROM, etc.)), a digital versatile disc, At least one of a Blu-ray (registered trademark) disk, a removable disk, a hard disk drive, a smart card, a flash memory device (eg, a card, a stick, a key drive), a magnetic stripe, a database, a server, and other suitable storage media. May be configured.
  • the storage 1003 may be called an auxiliary storage device.
  • 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 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 a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, for example, in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). May be configured.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission line interface 106, and the like may be realized by the communication device 1004.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an external input.
  • the output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, an LED (Light Emitting Diode) lamp, and the like). Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • the devices such as the processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using a different bus for each device.
  • the radio base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured to include hardware, 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 hardware.
  • DSP digital signal processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the channel and the symbol may be a signal (signaling).
  • the signal may be a message.
  • the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot, a pilot signal, or the like according to an applied standard.
  • a component carrier (CC: Component Carrier) may be called a cell, a frequency carrier, a carrier frequency, or the like.
  • the radio frame may be configured by one or a plurality of periods (frames) in the time domain.
  • the one or more respective periods (frames) forming the radio frame may be referred to as a subframe.
  • a subframe may be configured by one or more slots in the time domain.
  • the subframe may be of a fixed length of time (eg, 1 ms) that does not depend on numerology.
  • the new melology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
  • Numerology includes, for example, subcarrier interval (SCS: SubCarrier @ Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission @ Time @ Interval), number of symbols per TTI, radio frame configuration, transmission and reception.
  • SCS SubCarrier @ Spacing
  • TTI Transmission @ Time @ Interval
  • TTI Transmission @ Time @ Interval
  • radio frame configuration transmission and reception.
  • At least one of a specific filtering process performed by the transceiver in the frequency domain and a specific windowing process performed by the transceiver in the time domain may be indicated.
  • the slot may be configured by one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain. Further, the slot may be a time unit based on numerology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the slot may include a plurality of mini slots.
  • Each minislot may be constituted by one or more symbols in the time domain.
  • minislots may be called subslots.
  • a minislot may be made up of a smaller number of symbols than slots.
  • a PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (PUSCH) mapping type A.
  • a PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.
  • Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals.
  • the radio frame, the subframe, the slot, the minislot, and the symbol may have different names corresponding thereto. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be interchanged with each other.
  • one subframe may be called a transmission time interval (TTI: Transmission @ Time @ Interval)
  • TTI Transmission @ Time @ Interval
  • TTI Transmission Time interval
  • a plurality of consecutive subframes may be called a TTI
  • one slot or one minislot is called a TTI.
  • You may. 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 to 13 symbols), or a period longer than 1 ms. It may be.
  • the unit representing the TTI may be called a slot, a minislot, or the like instead of a subframe.
  • TTI means, for example, a minimum time unit of scheduling in wireless communication.
  • a radio base station performs scheduling for allocating radio resources (frequency bandwidth, transmission power, and the like that can be used in each user terminal) to each user terminal in TTI units.
  • radio resources frequency bandwidth, transmission power, and the like that can be used in each user terminal
  • the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, a code word, or a processing unit such as scheduling and link adaptation. Note that when a TTI is given, a time section (for example, the number of symbols) in which a transport block, a code block, a codeword, and the like are actually mapped may be shorter than the TTI.
  • one slot or one minislot is called a TTI
  • one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (mini-slot number) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE@Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, and the like.
  • a TTI shorter than the normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
  • a long TTI (for example, a normal TTI, a subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (for example, a shortened TTI, etc.) may be replaced with a TTI shorter than the long TTI and 1 ms.
  • the TTI having the TTI length described above may be replaced with the TTI.
  • the resource block (RB: 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 (subcarriers) in the frequency domain.
  • the number of subcarriers included in the RB may be the same irrespective of the numerology, and may be, for example, 12.
  • the number of subcarriers included 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 one slot, one minislot, one subframe, or one TTI.
  • One TTI, one subframe, and the like may each be configured by one or a plurality of resource blocks.
  • one or a plurality of RBs include a physical resource block (PRB: Physical @ RB), a subcarrier group (SCG: Sub-Carrier @ Group), a resource element group (REG: Resource @ Element @ Group), a PRB pair, an RB pair, and the like. May be called.
  • PRB Physical @ RB
  • SCG Sub-Carrier @ Group
  • REG Resource @ Element @ Group
  • PRB pair an RB pair, and the like. May be called.
  • a resource block may be composed of one or more resource elements (RE: Resource @ Element).
  • RE Resource @ Element
  • one RE may be a radio resource area of one subcarrier and one symbol.
  • a bandwidth part (which may also be referred to as a partial bandwidth or the like) may represent a subset of contiguous common RBs (common @ resource @ blocks) for a certain numerology in a certain carrier. Good.
  • the common RB may be specified by an index of the RB based on the common reference point of the carrier.
  • a PRB may be defined in a BWP and numbered within the BWP.
  • $ BWP may include a BWP for UL (UL @ BWP) and a BWP for DL (DL @ BWP).
  • BWP for a UE, one or more BWPs may be configured in one carrier.
  • At least one of the configured BWPs may be active, and the UE may not have to assume transmitting and receiving a given signal / channel outside the active BWP.
  • “cell”, “carrier”, and the like in the present disclosure may be replaced with “BWP”.
  • the structures of the above-described radio frame, subframe, slot, minislot, and symbol are merely examples.
  • 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, included in an RB The number of subcarriers, the number of symbols in a TTI, the symbol length, the configuration such as the cyclic prefix (CP) length can be variously changed.
  • the information, parameters, and the like described in the present disclosure may be represented using an absolute value, may be represented using a relative value from a predetermined value, or may be represented using another corresponding information. May be represented.
  • a radio resource may be indicated by a predetermined index.
  • Names used for parameters and the like in the present disclosure are not limited in any way. Further, the formulas and the like using these parameters may be different from those explicitly disclosed in the present disclosure.
  • the various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.) and information elements can be identified by any suitable name, so the various names assigned to these various channels and information elements Is not a limiting name in any way.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that can be referred to throughout the above description are not limited to voltages, currents, electromagnetic waves, magnetic or magnetic particles, optical or photons, or any of these. May be represented by a combination of
  • information, signals, and the like can be output from the upper layer to at least one of the lower layer and the lower layer to at least one of the upper layer.
  • Information, signals, and the like may be input and output via a plurality of network nodes.
  • Information and signals input and output may be stored in a specific location (for example, a memory) or may be managed using a management table. Information and signals that are input and output can be overwritten, updated, or added. The output information, signal, and the like may be deleted. The input information, signal, and the like may be transmitted to another device.
  • Notification of information is not limited to the aspect / embodiment described in the present disclosure, and may be performed using another method.
  • the information is notified by physical layer signaling (for example, downlink control information (DCI: Downlink Control Information), uplink control information (UCI: Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, It may be implemented by broadcast information (master information block (MIB: Master Information Block), system information block (SIB: System Information Block), etc.), MAC (Medium Access Control) signaling), other signals, or a combination thereof.
  • 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 called L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like.
  • the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
  • the MAC signaling may be notified using, for example, a MAC control element (MAC @ CE (Control @ Element)).
  • the notification of the predetermined information is not limited to an explicit notification, and is implicit (for example, by not performing the notification of the predetermined information or by another information). May be performed).
  • 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 performed by comparing numerical values (for example, comparison with a predetermined value).
  • software, instructions, information, and the like may be transmitted and received via a transmission medium.
  • a transmission medium For example, if the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), the website, When transmitted from a server or other remote source, at least one of these wired and / or wireless technologies is included within the definition of a transmission medium.
  • system and “network” may be used interchangeably.
  • precoding In the present disclosure, “precoding”, “precoder”, “weight (precoding weight)”, “pseudo collocation (QCL: Quasi-Co-Location)”, “transmission power”, “phase rotation”, “antenna port” , “Antenna port group”, “layer”, “number of layers”, “rank”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, “panel”, etc. The terms may be used interchangeably.
  • base station (BS: Base @ Station)”, “wireless base station”, “fixed station (fixed @ station)”, “NodeB”, “eNodeB (eNB)”, “gNodeB (gNB)”, “ “Access point (access @ point)”, “transmission point (TP: Transmission @ Point)”, “reception point (RP: Reception @ Point)”, “transmission / reception point (TRP: Transmission / Reception @ Point)", “panel”, “cell” Terms such as, “sector”, “cell group”, “carrier”, “component carrier” may be used interchangeably.
  • a base station may be referred to by a term such as a macro cell, a small cell, a femto cell, a pico cell, and the like.
  • a base station can accommodate one or more (eg, three) cells. If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH: Communication services can also be provided by Remote Radio ⁇ Head)).
  • a base station subsystem eg, a small indoor base station (RRH: Communication services can also be provided by Remote Radio ⁇ Head).
  • RRH Small indoor base station
  • the term “cell” or “sector” refers to part or all of the coverage area of at least one of a base station and a base station subsystem that provides communication services in this coverage.
  • MS mobile station
  • UE user equipment
  • terminal terminal
  • a mobile station is 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. , A handset, a user agent, a mobile client, a client or some other suitable terminology.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, or the like.
  • the base station and the mobile station may be a device mounted on the mobile unit, the mobile unit itself, or the like.
  • the moving object may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving object (for example, a drone, a self-driving car, etc.), or a robot (maned or unmanned). ).
  • at least one of the base station and the mobile station includes a device that does not necessarily move during a communication operation.
  • the wireless base station in the present disclosure may be replaced with a user terminal.
  • communication between a radio base station and a user terminal is replaced with communication between a plurality of user terminals (for example, may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
  • D2D Device-to-Device
  • V2X Vehicle-to-Everything
  • Each aspect / embodiment of the present disclosure may be applied to the configuration described above.
  • the configuration may be such that the user terminal 20 has the function of the wireless base station 10 described above.
  • words such as “up” and “down” may be read as words corresponding to communication between terminals (for example, “side”).
  • an uplink channel, a downlink channel, and the like may be replaced with a side channel.
  • the user terminal in the present disclosure may be replaced with a wireless base station.
  • the configuration may be such that the wireless base station 10 has the functions of the user terminal 20 described above.
  • an operation performed by the base station may be performed by an upper node (upper node) in some cases.
  • various operations performed for communication with a terminal include a base station, one or more network nodes other than the base station (eg, Obviously, it can be performed by MME (Mobility @ Management @ Entity), S-GW (Serving-Gateway), etc., but not limited thereto, or a combination thereof.
  • Each aspect / embodiment described in the present disclosure may be used alone, may be used in combination, or may be switched and used in execution. Further, the processing procedure, sequence, flowchart, and the like of each aspect / embodiment described in the present disclosure may be interchanged as long as there is no inconsistency. For example, the methods described in this disclosure use various exemplary steps to present elements of the various steps, and are not limited to the specific order presented.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution
  • LTE-B Long Term Evolution-Beyond
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication
  • system 5G (5th generation mobile communication system)
  • FRA Fluture Radio Access
  • New-RAT Radio Access Technology
  • NR New Radio
  • NX New radio access
  • FX Fluture generation radio access
  • GSM Registered trademark
  • CDMA2000 Code Division Multiple Access
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi (registered trademark)
  • IEEE 802.16 WiMAX (registered trademark)
  • UWB Ultra-WideBand
  • Bluetooth registered trademark
  • a system using other suitable wireless communication methods and a next-generation system extended based on these methods.
  • a plurality of systems may be combined (for example, a combination of LTE or LTE-A and 5G) and applied.
  • any reference 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 may be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not mean that only two elements can be employed or that the first element must precede the second element in some way.
  • determining means judging, calculating, computing, processing, deriving, investigating, looking up (for example, a table, Searching in a database or another data structure), ascertaining, etc., may be regarded as "deciding".
  • determination includes receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), and access ( accessing) (e.g., accessing data in a memory) or the like.
  • judgment (decision) is regarded as “judgment (decision)” of resolving, selecting, selecting, establishing, comparing, and the like. Is also good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of any operation.
  • “judgment (decision)” may be read as “assuming”, “expecting”, “considering”, or the like.
  • the “maximum transmission power” described in the present disclosure may mean the maximum value of the transmission power, may mean the nominal maximum transmission power (the nominal UE maximum transmit power), or may refer to the rated maximum transmission power (the rated UE maximum transmit power).
  • connection refers 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 “connected” or “coupled” to each other.
  • the coupling 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, microwave It can be considered to be “connected” or “coupled” to each other using electromagnetic energy having a wavelength in the region, the light (both visible and invisible) regions, and the like.
  • the term “A and B are different” may mean that “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 “coupled” may be construed similarly to “different.”

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon un aspect, la présente invention concerne un équipement utilisateur qui comprend : une unité de réception qui reçoit au moins un élément d'informations de réglage; et une unité de commande qui détermine une pluralité de rapports d'informations d'état de canal (CSI) correspondant respectivement à une pluralité de points de transmission, sur la base de l'au moins un élément d'informations de réglage. Selon un aspect de la présente invention, il est possible d'effectuer de manière appropriée une mesure et un rapport de CSI pour la pluralité de points de transmission.
PCT/JP2018/024613 2018-06-28 2018-06-28 Équipement utilisateur et station de base radio Ceased WO2020003443A1 (fr)

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JPWO2021220473A1 (fr) * 2020-04-30 2021-11-04
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JP2024502486A (ja) * 2021-01-12 2024-01-19 インターデイジタル パテント ホールディングス インコーポレイテッド Ｎｃｊｔにおけるジョイントｃｓｉ測定のための方法及び装置

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