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WO2025120827A1 - Terminal et procédé de mesure - Google Patents

Terminal et procédé de mesure Download PDF

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Publication number
WO2025120827A1
WO2025120827A1 PCT/JP2023/043922 JP2023043922W WO2025120827A1 WO 2025120827 A1 WO2025120827 A1 WO 2025120827A1 JP 2023043922 W JP2023043922 W JP 2023043922W WO 2025120827 A1 WO2025120827 A1 WO 2025120827A1
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WIPO (PCT)
Prior art keywords
waveform
waveforms
csi
base station
cqi
Prior art date
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Pending
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PCT/JP2023/043922
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English (en)
Japanese (ja)
Inventor
尚哉 芝池
聡 永田
チーピン ピ
ジン ワン
ウェンジャ リュー
ギョウリン コウ
ラン チン
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Docomo Inc
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NTT Docomo Inc
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Priority to PCT/JP2023/043922 priority Critical patent/WO2025120827A1/fr
Publication of WO2025120827A1 publication Critical patent/WO2025120827A1/fr
Pending legal-status Critical Current
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

Definitions

  • the present invention relates to a terminal and a measurement method in a wireless communication system.
  • 3GPP registered trademark
  • 3rd Generation Partnership Project 3rd Generation Partnership Project
  • 5G Fifth Generation Partnership Project
  • NR New Radio
  • 5G various wireless technologies and network architectures are being studied to meet the requirements of achieving a throughput of 10 Gbps or more while keeping latency in wireless sections to 1 ms or less (for example, Non-Patent Document 1 and Non-Patent Document 2).
  • requirements are being considered for the next generation, 6G.
  • such requirements include ultra broadband communication, mission critical communication, ultra massive connection, universal coverage, intelligent connection, ubiquitous sensing, etc.
  • the new concepts being considered are extensible (e.g., to be able to be used more effectively in the future), easy-operational, customizable (e.g., to be more easily operable), and sustainable (e.g., to reduce costs, have a more robust configuration, and be resilient).
  • the constant promise of a minimum level of performance as guaranteed communication is being considered.
  • 3GPP TS 38.300 V17.6.0 (2023-09) 3GPP TS 38.401 V17.6.0 (2023-09)
  • 3GPP TS 38.331 V17.6.0 (2023-09) 3GPP TS 38.214 V17.7.0 (2023-09)
  • next-generation wireless communication systems it is expected that new waveforms or extended transmission methods will be supported to meet the requirements. Therefore, multiple waveforms may be used.
  • the CSI (Channel State Information) feedback parameters may be different for each waveform.
  • the present invention has been made in consideration of the above points, and aims to perform CSI (Channel State Information) feedback when multiple waveforms are used in a wireless communication system.
  • CSI Channel State Information
  • a terminal has a receiver that receives a downlink signal to which multiple waveforms can be applied from a base station, a controller that measures the downlink signal, determines which of the multiple waveforms is to be applied to the downlink signal, and generates a CSI (Channel State Information) report, and a transmitter that transmits the CSI report to the base station.
  • CSI Channel State Information
  • the disclosed technology allows for CSI (Channel State Information) feedback to be performed when multiple waveforms are used in a wireless communication system.
  • CSI Channel State Information
  • FIG. 1 is a diagram illustrating an example of a configuration of a wireless communication system according to an embodiment of the present invention.
  • FIG. 11 is a sequence diagram for explaining an example of CSI feedback in an embodiment of the present invention.
  • FIG. 2 is a diagram for explaining an example (1) of a CQI table in the embodiment of the present invention.
  • FIG. 11 is a diagram for explaining an example (2) of a CQI table in the embodiment of the present invention.
  • 1 is a flowchart for explaining an example of CSI feedback in an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to an embodiment of the present invention.
  • 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention.
  • FIG. 2 is a diagram showing an example of the
  • LTE Long Term Evolution
  • NR NR
  • SS Synchronization signal
  • PSS Primary SS
  • SSS Secondary SS
  • PBCH Physical broadcast channel
  • PRACH Physical random access channel
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • NR corresponds to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc.
  • NR- even if a signal is used in NR, it is not necessarily specified as "NR-".
  • the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or another method (e.g., Flexible Duplex, etc.).
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • another method e.g., Flexible Duplex, etc.
  • radio parameters and the like when radio parameters and the like are “configured,” it may mean that predetermined values are pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are configured.
  • FIG. 1 is a diagram showing an example of the configuration of a wireless communication system in an embodiment of the present invention.
  • the wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20.
  • FIG. 1 shows one base station 10 and one terminal 20, this is an example, and there may be multiple of each.
  • the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
  • the physical resources of a wireless signal are defined in the time domain and the frequency domain, and the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks.
  • the base station 10 transmits a synchronization signal and system information to the terminal 20.
  • the synchronization signal is, for example, NR-PSS and NR-SSS.
  • the system information is, for example, transmitted by NR-PBCH and is also called broadcast information.
  • the synchronization signal and system information may be called SSB (SS/PBCH block). As shown in FIG.
  • the base station 10 transmits a control signal or data to the terminal 20 in DL (Downlink) and receives a control signal or data from the terminal 20 in UL (Uplink). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. In addition, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL. In addition, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) using CA (Carrier Aggregation). Furthermore, the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).
  • SCell Secondary Cell
  • PCell Primary Cell
  • CA Carrier Aggregation
  • the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10
  • the terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives control signals or data from the base station 10 in DL and transmits control signals or data to the base station 10 in UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 also receives various reference signals transmitted from the base station 10, and performs measurement of the propagation path quality based on the reception results of the reference signals.
  • M2M Machine-to-Machine
  • the requirements may be ultra broadband communication, mission critical communication, ultra massive connection, universal coverage, intelligent connection, ubiquitous sensing, etc.
  • the requirements may be ultra-high speed communication, large capacity communication, ultra-extended coverage, ultra-low power consumption, low cost, ultra-low latency, ultra-reliable communication, ultra-multiple connections and sensing, etc.
  • the new concepts being considered are extensible (e.g., to be able to be used more effectively in the future), easy-operational, customizable (e.g., to be more easily operable), and sustainable (e.g., to reduce costs, have a more robust configuration, and be resilient).
  • the constant promise of a minimum level of performance as guaranteed communication is being considered.
  • CP-OFDM Cyclic prefix OFDM
  • DFT-s-OFDM Discrete Fourier transform-spread-OFDM
  • the default waveform for UL was CP-OFDM, and the upper layer parameter of transform precoder enable/disable could be set for Msg3, PUSCH, CG, MsgA, and DMRS for PUCCH formats 3 and 4.
  • the higher layer parameters include, for example, the following (see Non-Patent Document 3): msg3-transformPrecoder, included in RACH-ConfigCommon. If the field is empty, the UE disables the transform precoder. - transformPrecoder, included in the PUSCH-Config. If the field is empty, the UE applies the value of msg3-transformPrecoder included in the rach-ConfigCommon directly in the BWP configuration. ⁇ Included in transformPrecoder and ConfiguredGrantConfig. - Included in msgA-TransformPrecoder-r16 and MsgA-PUSCH-Config-r16. Included in dmrs-UplinkTransformPrecodingPUCCH and PUCCH-Config. Used for DMRS for PUCCH formats 3 and 4.
  • DG Dynamic grant
  • DCI notification DCI format 0_1/0_2
  • Dynamic waveform switching is set separately for each BWP in the PUSCH-Config.
  • transform precoding is applied to PUSCH.
  • the UE may apply transform precoding based on the RRC parameter msg3-TransformPrecoder (see Non-Patent Document 3) to PUSCH scheduled by a RAR (Random access response) UL grant, a fallback RAR UL grant, or DCI format 0_0 scrambled by the TC-RNTI.
  • RAR Random access response
  • the UE may apply transform precoding to the transmission of MsgA PUSCH based on the RRC parameter msgA-TransformPrecoder (see Non-Patent Document 3).
  • the UE may apply transform precoding based on the transformPrecoder (see Non-Patent Document 3) included in the RRC parameter pusch-Config.
  • the UE may apply transform precoding based on the transformPrecoder (see Non-Patent Document 3) included in the RRC parameter configuredGrantConfig.
  • CP-OFDM and DFT-s-OFDM are supported for PUSCH.
  • the differences in parameters related to the PUSCH for these two waveforms are shown, for example, in 1)-6) below.
  • DFT-s-OFDM is 1 layer, and CP-OFDM is 4 to 8 layers.
  • Modulation method for example, ⁇ /2-BPSK (Binary Phase Shift Keying) is only supported by DFT-s-OFDM.
  • DMRS setting type Type 1 is supported for DFT-s-OFDM, and Type 1 and Type 2 are supported for CP-OFDM.
  • Frequency resource allocation type Type 1 and Type 2 are supported for DFT-s-OFDM, and Type 0, Type 1, and Type 2 are supported for CP-OFDM.
  • DMRS/PTRS antenna ports Different associations of DMRS/PTRS antenna ports apply.
  • Precoding matrix Separate precoding matrices are defined for CP-OFDM and DFT-s-OFDM.
  • NR supports DWS (Dynamic waveform switching) for dynamically scheduled PUSCH.
  • DWS Dynamic waveform switching
  • the DCI format notifies the waveform of the scheduled PUSCH.
  • an enhanced PHR Power headroom report
  • CQI tables are defined to calculate or determine the CQI (Channel quality indicator).
  • the CQI tables define the modulation method, coding rate, and efficiency.
  • multiple codebook types are defined for use in CSI reporting to report the PMI (Precoding matrix indicator). Codebooks with different numbers of layers are separated and each is defined in a different table.
  • the RRC parameter CSI-ReportConfig (see Non-Patent Document 3) used for settings related to CSI reporting includes, for example, information elements codebookConfig and cqi-Table.
  • codebookConfig is used for settings related to the codebook.
  • cqi-Table is used for CSI feedback.
  • the codebook settings are included in the settings related to CSI reporting.
  • the codebook settings set the codebook type, RI (Rank indicator) restrictions, and codebook subset restrictions.
  • the CSI feedback may be considered different for different waveform assumptions.
  • a UE when a UE reports CSI feedback based on channel estimation, it calculates RI, PMI and CQI based on the channel estimation. If the rank, CQI table and PMI codebook are different for different waveforms, the reported RI, PMI and CQI are expected to be different even for the same channel estimation result. Therefore, it is necessary to specify CSI feedback for new or additional DL waveforms.
  • the UE and base station 10 need to align their assumptions about the waveform type for CSI feedback. That is, the assumptions about the waveform type for CSI reporting need to be clarified.
  • assistance information reported by the UE to assist the base station 10 in PDSCH scheduling is useful. If the UE is capable of CSI reporting assuming multiple waveforms, it is assumed that the base station 10 uses the assistance information to determine which waveform to apply to the scheduled PDSCH. The assistance information is useful to support CSI reporting assuming multiple waveforms.
  • the UE or base station 10 may execute any, part or all of the following operations 1) to 3).
  • Action 1 Support CSI feedback for new or additional DL waveforms (eg, waveforms other than DFT-s-OFDM or CP-OFDM).
  • Action 1-1) Define separate or new CQI tables for new or additional DL waveforms.
  • Action 1-2) Define separate or new PMI codebooks for new or additional DL waveforms.
  • Action 2 For CSI reports with a certain reporting type, the UE reports CSI feedback based on one certain DL waveform assumption.
  • Action 2-1 As a waveform-type-non-transparent action, the UE decides to assume a certain DL waveform for a CSI report with a certain report type. The decision may be based on a definition in a specification, and/or may be configured or signaled by the base station 10, and/or may be based on a predefined rule.
  • the UE determines parameters, tables and/or entries for CSI reporting based on the assumed DL waveform (which may be based on operation 2-1) and calculates or determines at least one of RI, PMI, CQI, and LI (Layer indicator) using the determined parameters.
  • the parameters, tables and/or entries may be, for example, CQI tables and/or CQI entries and/or codebook settings (e.g., RI values and/or codebook subset restrictions, etc.) and/or CSI reporting modes, etc.
  • Action 3) For CSI reporting with a certain reporting type, the UE reports CSI feedback based on multiple waveform assumptions.
  • Action 3-1) The UE reports CSI feedback including report type results (eg, RI, PMI, CQI and/or LI) for multiple DL waveforms.
  • Operation 3-2) The UE calculates or determines a reporting type result (e.g., RI, PMI, CQI, and/or LI) based on multiple DL waveform assumptions.
  • the UE selects a reporting type result (e.g., RI, PMI, CQI, and/or LI) for one DL waveform to be reported.
  • FIG. 2 is a sequence diagram for explaining an example of CSI feedback in an embodiment of the present invention.
  • the base station 10 transmits a measurement-related configuration to the terminal 20.
  • the base station 10 transmits a signal including at least a PDSCH and a CSI-RS to the terminal 20.
  • the terminal 20 transmits a CSI report based on the measurement results to the base station 10.
  • Operation 1-1) Define a separate or new CQI table for a new or additional DL waveform.
  • One or more new or separate CQI tables may be defined or introduced for new or additional DL waveforms.
  • the new CQI table includes at least the modulation schemes for new or added DL waveforms. For example, any, some or all of the modulation schemes shown in 1)-3) below may be supported.
  • ⁇ /2-BPSK may be for DFT-s-OFDM
  • PAPR Peak-to-average power ratio
  • APSK Amplitude phase shift keying
  • ⁇ /4-QPSK Quadrature phase shift keying
  • alpha*phi-BPSK alpha*phi-QPSK, etc.
  • Newer higher order modulation schemes such as 2048QAM and/or 4096QAM.
  • New CQI tables including at least the spectral efficiency may be supported for new or additional DL waveforms.
  • the supported coding rates may be any, some or all of those shown in 1)-3) below.
  • Table 1 is an example of a new CQI table that supports ⁇ /2-BPSK for DFT-s-OFDM.
  • the new CQI table may be for DFT-s-OFDM, CP-OFDM, or other waveforms.
  • Non-Patent Document 4 Section 5.2.2.1, Tables 5.2.2.1-2 to 5.2.2.1-5) may be applicable to new or added DL waveforms (waveforms other than DFT-s-OFDM or CP-OFDM).
  • Non-Patent Document 4 may be applied to the MCS table (see Non-Patent Document 4, section 5.1.3.2).
  • FIG. 3 is a diagram for explaining an example (1) of a CQI table in an embodiment of the present invention.
  • different rows of the extended CQI table may correspond to different waveforms.
  • rows #0 to n0 may be for CP-OFDM
  • rows #n0+1 to #n1 may be for DFT-s-OFDM.
  • rows #0 to n0 may be for DFT-s-OFDM
  • rows #n0+1 to #n1 may be for CP-OFDM.
  • FIG. 4 is a diagram for explaining an example (2) of a CQI table in an embodiment of the present invention.
  • different waveforms e.g., CP-OFDM and DFT-s-OFDM
  • CQI tables for new or additional DL waveforms may be defined by a subset of the CQI tables or entries included in the CQI table for CP-OFDM.
  • Action 1-2 Define a separate or new PMI codebook for the new or additional DL waveform.
  • Different codebooks may be required for different waveforms, for example to meet requirements related to PAPR performance.
  • Separate or new PMI codebook tables may be defined or introduced for new or additional DL waveforms.
  • the new PMI codebooks may be any, some or all of those shown in 1)-6) below.
  • Type 1 single panel codebook and/or Type 1 multi-panel codebook 2) Type 2 codebook and/or Type 2 port selective codebook; 3) Enhanced Type 2 codebook and/or Enhanced Type 2 port selective codebook; 4) Further enhanced Type 2 port selective codebook; 5) Coherent joint transmission (CJT) CSI codebook; 6) Doppler CSI codebook.
  • CJT Coherent joint transmission
  • the rank in the separated PMI codebook table may be 1) and/or 2) as shown below.
  • New or additional separated PMI codebooks for DL waveforms with rank of at least 1 may be introduced.
  • Separate PMI codebooks for new or additional DL waveforms with ranks greater than 1 may be introduced. This may depend on whether multiple layers are supported for the new or additional DL waveform. For example, when multiple layers DFT-s-OFDM are supported, a codebook for multiple layers DFT-s-OFDM may be defined.
  • Operation 1) above allows CQI tables and PMI codebooks to be defined for new or additional DL waveforms.
  • the UE may report CSI feedback based on one DL waveform assumption.
  • the CSI report with the certain report type may include a CSI report in which reportQuantity (see Non-Patent Document 3) is set to any one of cri-RI-PMI-CQI, cri-RI-i1, cri-RI-i1-CQI, cri-RI-CQI, and cri-RI-LI-PMI-CQI, or any part or all of the above.
  • Which DL waveform type is assumed for CSI reporting may be transparent to the UE.
  • the CQI table and codebook configuration e.g., RI restriction and codebook subset restriction
  • the CQI table and codebook configuration included in one CSI reporting configuration may be for a certain waveform type.
  • the base station 10 may include a CQI table and codebook configuration applicable to DFT-s-OFDM in the CSI reporting configuration. This allows legacy specifications to be reused.
  • Operation 2-1 As an operation that is not transparent to waveform type, the UE determines to assume a certain DL waveform for a CSI report with a certain report type. The determination may be based on a definition in a specification, and/or may be configured or notified by the base station 10, and/or may be based on a predefined rule.
  • the UE may or may not report the determined waveform in the CSI report.
  • the specification may define a DL waveform type or a default DL waveform type for CSI feedback.
  • DFT-s-OFDM or CP-OFDM may be the default waveform type. This allows the reuse of legacy configurations for CSI reporting.
  • the DL waveform assumption for CSI feedback may be notified or set by the base station 10.
  • the DL waveform assumption for CSI feedback may be explicitly notified by RRC signaling.
  • the RRC signaling may be a DL waveform configuration in pdsch-Config, or a DL waveform type configured per CSI reporting configuration (e.g., CSI-ReportConfig).
  • the RRC signaling may be the DL waveform type configured for the associated codebook configuration, or may be an RRC parameter indicating the waveform, for example in CodebookConfig.
  • the RRC signaling may be a DL waveform type associated with a CSI-RS resource or resource set, or may be an RRC parameter indicating, for example, a waveform within a configuration of a CSI-RS resource or resource set.
  • the UE may not assume that different waveforms are signaled. For example, the UE may assume that the waveforms signaled by the CSI reporting configuration, the associated codebook configuration, and the associated CSI-RS resource or resource set are identical.
  • the DL waveform assumption may also be implicitly signaled by the configured CQI table and/or codebook settings (e.g., RI values and/or codebook subset restrictions, etc.) included in the CSI reporting configuration.
  • codebook settings e.g., RI values and/or codebook subset restrictions, etc.
  • a CQI table is configured that is supported or applicable only to a certain DL waveform (e.g., CP-OFDM or DFT-s-OFDM), it may be assumed that the corresponding DL waveform is used for CSI feedback.
  • a certain DL waveform e.g., CP-OFDM or DFT-s-OFDM
  • a codebook type, RI and/or codebook subset is configured that is supported or applicable only to a certain DL waveform (e.g., CP-OFDM or DFT-s-OFDM), it may be assumed that the corresponding DL waveform is used for CSI feedback.
  • a certain DL waveform e.g., CP-OFDM or DFT-s-OFDM
  • the DL waveform assumption may be signaled by the DCI or MAC-CE that enables CSI reporting.
  • the DL waveform assumption may be signaled directly by the DCI or MAC-CE that enables CSI reporting.
  • the DL waveform assumption may be signaled by reusing or reinterpreting new or existing fields.
  • the DL waveform assumption may be signaled implicitly by the format of the DCI that enables CSI reporting.
  • the DL waveform type may also be determined based on predefined rules. For example, the waveform applied to the latest PDSCH reception that satisfies any, some or all of the following conditions may be used for CSI feedback:
  • - It is a DG-PDSCH scheduled by a specified DCI format.
  • - SPS-PDSCH is enabled by a specified DCI format.
  • a PDSCH whose start or end symbol is X symbols, X slots, X subframes or X frames earlier than the start or end symbol of the PUSCH or PUCCH carrying the CSI report.
  • a PDSCH whose start or end symbol is X symbols, X slots, X subframes or X frames earlier or later than the start or end symbol of a DCI or MAC-CE that enables the CSI resource or CSI reporting configuration it references.
  • the waveform may be used for CSI feedback.
  • a given DCI format A PDCCH whose start or end symbol is X symbols, X slots, X subframes or X frames earlier than the start or end symbol of the PUSCH or PUCCH carrying the CSI report.
  • a PDCCH whose start or end symbol is X symbols, X slots, X subframes or X frames earlier or later than the start or end symbol of a DCI or MAC-CE that enables the CSI resource or CSI reporting configuration it references.
  • the UE determines parameters, tables and/or entries for CSI reporting based on the assumed DL waveform (which may be based on operation 2-1) and calculates or determines at least one of RI, PMI, CQI and LI (Layer indicator) using the determined parameters.
  • the parameters, tables and/or entries may be, for example, CQI tables and/or CQI entries and/or codebook settings (e.g., RI values and/or codebook subset restrictions, etc.) and/or CSI reporting modes, etc.
  • a set of parameters may be configured for CSI reporting.
  • the parameters may be any of a CQI table, a codebook setting, and a CSI reporting mode.
  • the UE may determine some or all of the CQI table, entries, RI value restrictions, codebook subset restrictions, and codebook mode based on the determined waveform type.
  • the UE may operate as follows regarding the CQI table settings: 1) or 2).
  • the UE may assume that the configured CSI reporting settings are applicable to the determined waveform type.
  • the UE may assume that only the set of entries is applicable to the determined waveform type. That is, the UE may assume that entries other than the set of entries in the configured CQI table are not applicable to the determined waveform type. For example, the UE may apply only the set of entries to DFT-s-OFDM if the expected waveform type is DFT-s-OFDM. For example, the UE may apply only the set of entries to CP-OFDM if the expected waveform type is CP-OFDM.
  • the UE may use only RI values within the set RI value set and apply them to the determined waveform type. That is, RI values other than the set RI value may not be applicable to the determined waveform type.
  • the UE may apply only the set RI value set to DFT-s-OFDM.
  • the UE may apply only the set RI value set to CP-OFDM.
  • the UE may behave as follows: 1) or 2) as shown below.
  • the UE may interpret the PMI codebook subset restrictions when using the codebook table as being defined for the determined DL waveform.
  • the UE may use only the codebook/PMI indices within the configured codebook subset limit for the determined DL waveform. That is, codebooks/PMI indices other than the codebook/PMI indices within the configured codebook subset limit may not be applicable to the determined waveform.
  • the UE may determine the CQI table and/or codebook settings (e.g., RI restrictions and/or codebook subset restrictions, etc.) as in legacy NR, without any information regarding the determined waveform assumption.
  • the UE may assume that the determined CQI table and/or RI values and/or codebook subset restrictions and/or codebook type modes are applicable to the determined waveform type assumption.
  • multiple sets of parameters may be configured for CSI reporting.
  • the parameters may be any of a CQI table, a codebook setting, and a CSI reporting mode.
  • the UE may determine some or all of the CQI table, entries, RI value restrictions, codebook subset restrictions, and codebook modes based on the determined waveform type.
  • the UE When setting the CQI table, the UE may operate as shown below in 1) or 2).
  • the UE may assume that the configured CSI reporting settings are applicable to the corresponding waveform type.
  • the UE may assume that only the set of entries is applicable to the corresponding waveform type, i.e., that no entries in the configured CQI table other than the set of entries are applicable to the determined waveform type.
  • the UE may assume that the RI values within the configured RI value set are applicable or supported for the corresponding waveform type.
  • codebook subset restriction is set, the UE may behave as follows: 1) or 2).
  • the UE may interpret the PMI codebook subset restrictions when using that codebook table as being defined for the corresponding DL waveform.
  • codebook/PMI indices are not defined, for example, if a set of different codebook/PMI indices in the codebook table is applicable to a corresponding DL waveform, the UE may use only the codebook/PMI indices within the configured codebook subset limit for the corresponding DL waveform. That is, codebook/PMI indices other than the codebook/PMI indices within the configured codebook subset limit may not be applicable to the determined waveform.
  • the UE may assume that the codebook type modes in that set are applicable or supported for the corresponding waveform.
  • the UE reports CSI feedback including report type results (e.g., RI, PMI, CQI and/or LI) for multiple DL waveforms.
  • report type results e.g., RI, PMI, CQI and/or LI
  • the UE may calculate or determine the RI, PMI, CQI and/or LI based on that DL waveform.
  • the UE may calculate or determine the RI and/or PMI and/or CQI and/or LI based on the number of supported layers and/or MCS table and/or CQI table and/or codebook defined for that DL waveform.
  • the UE may report CSI feedback that includes multiple sets of report type results (e.g., RI, PMI, CQI, LI results), each set corresponding to one DL waveform.
  • report type results e.g., RI, PMI, CQI, LI results
  • CSI Part 1 may contain information for only one waveform type.
  • Reporting type results for a waveform type e.g., RI, PMI, CQI, LI results
  • all report type results for waveform types other than the one waveform type in question may be included in CSI Part 2.
  • the particular waveform type may be defined by a specification, may be configured or notified to the base station 10, or may be included in the CSI and reported.
  • CSI part 1 may include an additional X-bit waveform indicator to indicate the particular waveform type.
  • CSI Part 1 may include information on multiple waveform types.
  • Information on multiple waveform types may be included in CSI Part 1 based on the legacy NR specification, and information on multiple waveform types may be included in CSI Part 2 based on the legacy NR specification.
  • the order of the waveforms in the CSI may be defined by the specification, may be configured or notified to the base station 10, or may be included in the CSI and reported.
  • CSI Part 1 may include an additional X-bit waveform indicator to notify one of the waveform types.
  • the UE may calculate or determine at least one of the RI, PMI, CQI, and LI based on at least one of the number of supported layers, the MCS table, the CQI table, and the codebook defined for CP-OFDM.
  • the UE may also calculate or determine at least one of the RI, PMI, CQI, and LI based on at least one of the number of supported layers, the MCS table, the CQI table, and the codebook defined for DFT-s-OFDM.
  • CP-OFDM is the first waveform
  • DFT-s-OFDM is the second waveform.
  • CSI part 1 may include RI and CQI for the 1st CW (codeword) of the first waveform
  • CSI part 2 may include PMI, LI, and CQI for the 2nd CW of the first waveform, and RI, PMI, LI, and CQI of the second waveform.
  • the CSI part may include RI and CQI for the 1st CW of the first waveform, and RI and CQI for the 1st CW of the second waveform
  • CSI part 2 may include PMI, LI, and CQI for the 2nd CW of the first waveform, and PMI, LI, and CQI for the 2nd CW of the second waveform.
  • the absolute value of the CQI index may be reported, or a differential CQI that is a relative value with respect to the first waveform may be reported.
  • the UE calculates or determines a reporting type result (e.g., RI, PMI, CQI, and/or LI) based on multiple DL waveform assumptions.
  • the UE selects a reporting type result (e.g., RI, PMI, CQI, and/or LI) for one DL waveform to be reported.
  • FIG. 5 is a flow chart for explaining an example of CSI feedback in an embodiment of the present invention.
  • the UE calculates or determines RI, PMI, CQI, LI and TBS for CP-OFDM, and calculates or determines RI, PMI, CQI, LI and TBS for DFT-s-OFDM.
  • the UE compares the results and selects either CP-OFDM or DFT-s-OFDM.
  • the UE performs CSI reporting for the selected waveform.
  • the UE may calculate or determine the RI and/or PMI and/or CQI and/or LI and/or TBS based on the number of supported layers and/or MCS table and/or CQI table and/or codebook defined for that DL waveform.
  • the UE may select one DL waveform from among multiple DL waveforms based on the results of the calculated or determined RI and/or PMI and/or CQI and/or LI and/or TBS.
  • the UE may select one of multiple DL waveforms based on a certain rule. For example, the UE may select a DL waveform with a larger corresponding TBS, a DL waveform with a smaller corresponding TBS, a DL waveform with a higher spectral efficiency, a DL waveform with a lower spectral efficiency, a DL waveform with a higher coding rate, a DL waveform with a lower coding rate, a DL waveform with a higher rank, or a DL waveform with a lower rank.
  • the UE may randomly select one DL waveform from those whose corresponding TBS and/or spectral efficiency and/or coding rate and/or rank and/or layer results exceed or do not exceed a certain threshold.
  • the UE may report the results of the report type for the selected DL waveform (e.g., RI, PMI, CQI and/or LI) in the CSI report.
  • the UE may include information indicating the selected DL waveform in the CSI report, for example in CSI Part 1.
  • the above-mentioned actions 3), 3-1) and 3-2) may be applied when certain conditions are met.
  • the certain conditions may be any, part or all of the conditions listed below in 1)-9).
  • the base station 10 explicitly configures or notifies, for example, by RRC signaling, MAC-CE or DCI, that CSI feedback based on multiple waveforms is to be reported.
  • Operation 3 allows reporting of new or additional CQI feedback for DL waveforms.
  • the UE capabilities shown below may be defined for each UE, each FR, each FC, etc., and reported from the UE to the base station 10.
  • the new or additional DL waveform may be DFT-s-OFDM, enhanced DFT-s-OFDM, DFT-s-OTFS, or SC-FDE, etc.
  • the new or additional DL waveform may be DFT-s-OFDM, enhanced DFT-s-OFDM, DFT-s-OTFS, or SC-FDE, etc.
  • CQI tables for new or additional DL waveforms.
  • PMI codebook tables for new or additional DL waveforms.
  • CSI reporting for DL waveforms signaled or configured by the gNB or defined by specifications or rules, or CSI reporting based on DL waveforms signaled or configured by the gNB or defined by specifications or rules. Whether to support CSI reporting for multiple DL waveforms or CSI reporting based on multiple DL waveforms. Whether to support CSI reporting including multiple CSI report type results for multiple DL waveforms or multiple CSI report type results based on multiple DL waveforms.
  • the above embodiment allows for defining how to perform CSI feedback when multiple waveforms are used.
  • CSI Channel State Information
  • the base station 10 and the terminal 20 include functions for implementing the above-mentioned embodiments. However, the base station 10 and the terminal 20 may each include only a part of the functions in the embodiments.
  • Fig. 6 is a diagram showing an example of the functional configuration of the base station 10 in the embodiment of the present invention.
  • the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140.
  • the functional configuration shown in Fig. 6 is merely an example.
  • the names of the functional divisions and functional units may be any as long as they can execute the operations related to the embodiment of the present invention.
  • the transmitting unit 110 has a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly.
  • the transmitting unit 110 also transmits inter-network node messages to other network nodes.
  • the receiving unit 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signals.
  • the transmitting unit 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, etc. to the terminal 20.
  • the receiving unit 120 also receives inter-network node messages from other network nodes.
  • the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20.
  • the contents of the setting information include, for example, information related to the setting of CSI reporting.
  • the control unit 140 performs control related to CSI reporting as described in the embodiment.
  • the control unit 140 also executes scheduling.
  • the functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120.
  • Fig. 7 is a diagram showing an example of a functional configuration of the terminal 20 in the embodiment of the present invention.
  • the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240.
  • the functional configuration shown in Fig. 7 is merely an example.
  • the names of the functional divisions and functional units may be any as long as they can execute the operations related to the embodiment of the present invention.
  • the transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly.
  • the receiver 220 wirelessly receives various signals and acquires higher layer signals from the received physical layer signals.
  • the receiver 220 also has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, etc. transmitted from the base station 10.
  • the transmitter 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to another terminal 20 as D2D communication, and the receiver 220 receives PSCCH, PSSCH, PSDCH, PSBCH, etc. from the other terminal 20.
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • PSDCH Physical Sidelink Discovery Channel
  • PSBCH Physical Sidelink Broadcast Channel
  • the setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220.
  • the setting unit 230 also stores setting information that is set in advance.
  • the content of the setting information is, for example, information related to the setting of CSI reporting.
  • the control unit 240 performs control related to CSI reporting as described in the embodiment.
  • the functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.
  • each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices.
  • the functional block may be realized by combining the one device or the multiple devices with software.
  • Functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
  • a functional block (component) that performs the transmission function is called a transmitting unit or transmitter.
  • the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 8 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 in one embodiment of the present disclosure.
  • the above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.
  • the term "apparatus" can be interpreted as a circuit, device, unit, etc.
  • the hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.
  • the functions of the base station 10 and the terminal 20 are realized by loading specific software (programs) onto hardware such as the processor 1001 and the storage device 1002, causing the processor 1001 to perform calculations, control communications by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
  • the processor 1001 for example, operates an operating system to control the entire computer.
  • the processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, etc.
  • CPU central processing unit
  • control unit 140, control unit 240, etc. may be realized by the processor 1001.
  • the processor 1001 reads out a program (program code), software module, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to the program.
  • the program is a program that causes a computer to execute at least a part of the operations described in the above-mentioned embodiment.
  • the control unit 140 of the base station 10 shown in FIG. 6 may be stored in the storage device 1002 and realized by a control program that runs on the processor 1001.
  • the control unit 240 of the terminal 20 shown in FIG. 7 may be stored in the storage device 1002 and realized by a control program that runs on the processor 1001.
  • the processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from a network via a telecommunication line.
  • the storage device 1002 is a computer-readable recording medium and may be composed of, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), etc.
  • the storage device 1002 may also be called a register, a cache, a main memory, etc.
  • the storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method relating to one embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc.
  • the above-mentioned storage medium may be, for example, a database, a server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.
  • the communication device 1004 is hardware (transmitting/receiving 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, etc.
  • the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to realize at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmitting/receiving antenna, an amplifier unit, a transmitting/receiving unit, a transmission path interface, etc. may be realized by the communication device 1004.
  • the transmitting/receiving unit may be implemented as a transmitting unit or a receiving unit that is physically or logically separated.
  • the input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).
  • each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses between each device.
  • the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware.
  • the processor 1001 may be implemented using at least one of these pieces of hardware.
  • FIG. 9 shows an example configuration of a vehicle 2001.
  • the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013.
  • a communication device mounted on the vehicle 2001 and may be applied to the communication module 2013, for example.
  • the drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.
  • the steering unit 2003 includes at least a steering wheel (also called a handlebar), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.
  • the electronic control unit 2010 is composed of a microprocessor 2031, memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001.
  • the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
  • Signals from the various sensors 2021-2029 include a current signal from a current sensor 2021 that senses the motor current, a front or rear wheel rotation speed signal acquired by a rotation speed sensor 2022, a front or rear wheel air pressure signal acquired by an air pressure sensor 2023, a vehicle speed signal acquired by a vehicle speed sensor 2024, an acceleration signal acquired by an acceleration sensor 2025, an accelerator pedal depression amount signal acquired by an accelerator pedal sensor 2029, a brake pedal depression amount signal acquired by a brake pedal sensor 2026, a shift lever operation signal acquired by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 2028.
  • the information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices.
  • the information service unit 2012 uses information acquired from an external device via the communication module 2013 or the like to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.
  • the information service unit 2012 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside.
  • input devices e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.
  • output devices e.g., a display, a speaker, an LED lamp, a touch panel, etc.
  • the driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as a millimeter wave radar, LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high definition (HD) maps, autonomous vehicle (AV) maps, etc.), a gyro system (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chip, and AI processor, as well as one or more ECUs that control these devices.
  • the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize driving assistance functions or autonomous driving functions.
  • the communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port.
  • the communication module 2013 transmits and receives data via the communication port 2033 between the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided on the vehicle 2001.
  • the communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication.
  • the communication module 2013 may be located either inside or outside the electronic control unit 2010.
  • the external device may be, for example, a base station, a mobile station, etc.
  • the communication module 2013 may transmit at least one of the signals from the various sensors 2021-2028 described above input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication.
  • the electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept input.
  • the PUSCH transmitted by the communication module 2013 may include information based on the above input.
  • the communication module 2013 receives various information (traffic information, signal information, vehicle distance information, etc.) transmitted from an external device, and displays it on the information service unit 2012 provided in the vehicle 2001.
  • the information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 2013).
  • the communication module 2013 also stores various information received from an external device in a memory 2032 that can be used by the microprocessor 2031.
  • the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.
  • a terminal having a receiving unit that receives a downlink signal to which a plurality of waveforms can be applied from a base station, a control unit that measures the downlink signal, determines a waveform among the plurality of waveforms to be applied to the downlink signal, and generates a Channel State Information (CSI) report, and a transmitting unit that transmits the CSI report to the base station.
  • a receiving unit that receives a downlink signal to which a plurality of waveforms can be applied from a base station
  • a control unit that measures the downlink signal, determines a waveform among the plurality of waveforms to be applied to the downlink signal, and generates a Channel State Information (CSI) report
  • CSI Channel State Information
  • the above configuration allows for the specification of a method for performing CSI feedback when multiple waveforms are used.
  • CSI Channel State Information
  • the control unit may generate the CSI report using a different CQI (Channel quality indicator) table for each of the multiple waveforms. This configuration allows for defining how to perform CSI feedback when multiple waveforms are used.
  • CQI Channel quality indicator
  • the control unit may determine the waveform to be applied to the downlink signal based on the measurement settings. This configuration allows for specifying how to perform CSI feedback when multiple waveforms are used.
  • the control unit may assume that the measurement settings are applicable to the waveform applied to the downlink signal. This configuration allows for specifying how to perform CSI feedback when multiple waveforms are used.
  • the control unit may determine which of the multiple waveforms to transmit a CSI report for based on the result of the measurement of the downlink signal. This configuration allows for the specification of a method for performing CSI feedback when multiple waveforms are used.
  • a measurement method in which a terminal executes the steps of receiving a downlink signal to which multiple waveforms can be applied from a base station, measuring the downlink signal, determining which of the multiple waveforms is to be applied to the downlink signal, and generating a CSI (Channel State Information) report, and transmitting the CSI report to the base station.
  • CSI Channel State Information
  • the above configuration allows for the specification of a method for performing CSI feedback when multiple waveforms are used.
  • CSI Channel State Information
  • the operations of multiple functional units may be physically performed by one part, or the operations of one functional unit may be physically performed by multiple parts.
  • the order of the processing procedures described in the embodiment may be changed as long as there is no contradiction.
  • the base station 10 and the terminal 20 have been described using functional block diagrams, but such devices may be realized by hardware, software, or a combination thereof.
  • the software operated by the processor possessed by the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor possessed by the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
  • the notification of information is not limited to the aspects/embodiments described in the present disclosure and may be performed using other methods.
  • the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination of these.
  • RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
  • Each aspect/embodiment described in this disclosure may be applied to at least one of systems utilizing LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), or other suitable systems, and next generation systems enhanced based on these. Additionally, multiple systems may be combined (for example, a combination of at least one of LTE and LTE-A with 5G, etc.).
  • certain operations that are described as being performed by the base station 10 may in some cases be performed by its upper node.
  • various operations performed for communication with a terminal 20 may be performed by at least one of the base station 10 and other network nodes other than the base station 10 (such as, but not limited to, an MME or S-GW).
  • the base station 10 may be a combination of multiple other network nodes (such as an MME and an S-GW).
  • the information or signals described in this disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). They may be input and output via multiple network nodes.
  • the input and output information may be stored in a specific location (e.g., memory) or may be managed using a management table.
  • the input and output information may be overwritten, updated, or added to.
  • the output information may be deleted.
  • the input information may be sent to another device.
  • the determination in this disclosure may be based on a value represented by one bit (0 or 1), a Boolean (true or false) value, or a comparison of numerical values (e.g., a comparison with a predetermined value).
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • Software, instructions, information, etc. may also be transmitted and received via a transmission medium.
  • a transmission medium For example, if the software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.
  • wired technologies such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)
  • wireless technologies such as infrared, microwave
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.
  • At least one of the channel and the symbol may be a signal (signaling).
  • the signal may be a message.
  • a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.
  • system and “network” are used interchangeably.
  • radio resources may be indicated by an index.
  • the names used for the above-mentioned parameters are not limiting in any respect. Furthermore, the formulas etc. using these parameters may differ from those explicitly disclosed in this disclosure.
  • the various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any respect.
  • base station BS
  • wireless base station base station
  • base station device fixed station
  • NodeB nodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • access point e.g., "transmission point”
  • gNodeB gNodeB
  • a base station may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.
  • a base station can accommodate one or more (e.g., three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)).
  • RRH Remote Radio Head
  • the term "cell” or “sector” refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.
  • a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.
  • MS Mobile Station
  • UE User Equipment
  • a mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc.
  • At least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.
  • the moving object is a movable object, and the moving speed is arbitrary. It also includes the case where the moving object is stopped.
  • the moving object includes, but is not limited to, for example, a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, an excavator, a bulldozer, a wheel loader, a dump truck, a forklift, a train, a bus, a handcar, a rickshaw, a ship and other watercraft, an airplane, a rocket, an artificial satellite, a drone (registered trademark), a multicopter, a quadcopter, a balloon, and objects mounted thereon.
  • the moving object may also be a moving object that travels autonomously based on an operation command.
  • At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations.
  • at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read as a user terminal.
  • each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)).
  • the terminal 20 may be configured to have the functions of the base station 10 described above.
  • terms such as "uplink” and "downlink” may be read as terms corresponding to terminal-to-terminal communication (for example, "side").
  • the uplink channel, downlink channel, etc. may be read as a side channel.
  • the user terminal in this disclosure may be interpreted as a base station.
  • the base station may be configured to have the functions of the user terminal described above.
  • determining may encompass a wide variety of actions.
  • Determining and “determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., searching in a table, database, or other data structure), and considering ascertaining as “judging” or “determining.”
  • determining and “determining” may include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and considering ascertaining as “judging” or “determining.”
  • judgment” and “decision” can include considering resolving, selecting, choosing, establishing, comparing, etc., to have been “judged” or “decided.” In other words, “judgment” and “decision” can include considering some action to have been “judged” or “decided.” Additionally, “judgment (decision)” can be interpreted as “assuming,” “ex
  • 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 that are “connected” or “coupled” to each other.
  • the coupling or connection between elements may be physical, logical, or a combination thereof.
  • “connected” may be read as "access.”
  • two elements may be considered to be “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.
  • the reference signal may also be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.
  • the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to an element using a designation such as "first,” “second,” etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.
  • a radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.
  • Numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, at least one of the following: Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, a particular filtering operation performed by the transceiver in the frequency domain, a particular windowing operation performed by the transceiver in the time domain, etc.
  • SCS Subcarrier Spacing
  • TTI Transmission Time Interval
  • radio frame structure a particular filtering operation performed by the transceiver in the frequency domain, a particular windowing operation performed by the transceiver in the time domain, etc.
  • a slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.).
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • a slot may be a time unit based on numerology.
  • a slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A.
  • a PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.
  • Radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals. Radio frame, subframe, slot, minislot, and symbol may each be referred to by a different name that corresponds to the radio frame, subframe, slot, minislot, and symbol.
  • one subframe may be called a Transmission Time Interval (TTI)
  • TTI Transmission Time Interval
  • multiple consecutive subframes may be called a TTI
  • one slot or one minislot may be called a TTI.
  • at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
  • the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.
  • TTI refers to, for example, the smallest time unit for scheduling in wireless communication.
  • a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units.
  • wireless resources such as frequency bandwidth and transmission power that can be used by each terminal 20
  • TTI is not limited to this.
  • the TTI may be a transmission time unit for a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc.
  • the time interval e.g., the number of symbols
  • the time interval in which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit of scheduling.
  • the number of slots (minislots) that constitute the minimum time unit of 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), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
  • TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, minislot, subslot, slot, etc.
  • a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms
  • a short TTI e.g., a shortened TTI, etc.
  • TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
  • the number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12.
  • the number of subcarriers included in an RB may be determined based on the numerology.
  • the time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length.
  • One TTI, one subframe, etc. may each be composed of one or more resource blocks.
  • one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.
  • PRB physical resource block
  • SCG sub-carrier group
  • REG resource element group
  • PRB pair an RB pair, etc.
  • a resource block may be composed of one or more resource elements (REs).
  • REs resource elements
  • 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, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by an index of the RB relative to a common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within the BWP.
  • the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
  • UL BWP UL BWP
  • DL BWP DL BWP
  • One or more BWPs may be configured for a UE within one carrier.
  • At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
  • BWP bitmap
  • radio frames, subframes, slots, minislots, and symbols 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, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
  • a and B are different may mean “A and B are different from each other.”
  • the term may also mean “A and B are each different from C.”
  • Terms such as “separate” and “combined” may also be interpreted in the same way as “different.”
  • notification of specific information is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the specific information).
  • Base station 110 Transmitter 120 Receiver 130 Setting unit 140 Control unit 20 Terminal 210 Transmitter 220 Receiver 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

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

Abstract

Un terminal comprend : une unité de réception qui reçoit, en provenance d'une station de base, un signal de liaison descendante auquel une pluralité de formes d'onde peut être appliquée ; une unité de contrôle qui mesure le signal de liaison descendante, détermine une forme d'onde à appliquer au signal de liaison descendante parmi la pluralité de formes d'ondes, et génère un rapport d'informations d'état de canal (CSI) ; et une unité de transmission qui transmet le rapport de CSI à la station de base.
PCT/JP2023/043922 2023-12-07 2023-12-07 Terminal et procédé de mesure Pending WO2025120827A1 (fr)

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PCT/JP2023/043922 WO2025120827A1 (fr) 2023-12-07 2023-12-07 Terminal et procédé de mesure

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PCT/JP2023/043922 WO2025120827A1 (fr) 2023-12-07 2023-12-07 Terminal et procédé de mesure

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WO2025120827A1 true WO2025120827A1 (fr) 2025-06-12

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018196005A (ja) * 2017-05-18 2018-12-06 ソニー株式会社 通信装置、基地局、方法及び記録媒体
JP2019062344A (ja) * 2017-09-26 2019-04-18 シャープ株式会社 端末装置および基地局装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018196005A (ja) * 2017-05-18 2018-12-06 ソニー株式会社 通信装置、基地局、方法及び記録媒体
JP2019062344A (ja) * 2017-09-26 2019-04-18 シャープ株式会社 端末装置および基地局装置

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