WO2023112277A1 - Terminal, procédé de communication sans fil et station de base - Google Patents

Terminal, procédé de communication sans fil et station de base Download PDF

Info

Publication number
WO2023112277A1
WO2023112277A1 PCT/JP2021/046612 JP2021046612W WO2023112277A1 WO 2023112277 A1 WO2023112277 A1 WO 2023112277A1 JP 2021046612 W JP2021046612 W JP 2021046612W WO 2023112277 A1 WO2023112277 A1 WO 2023112277A1
Authority
WO
WIPO (PCT)
Prior art keywords
reference signal
information
channel
dci
dmrs
Prior art date
Application number
PCT/JP2021/046612
Other languages
English (en)
Japanese (ja)
Inventor
春陽 越後
祐輝 松村
尚哉 芝池
浩樹 原田
Original Assignee
株式会社Ｎｔｔドコモ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to CN202180105415.3A priority Critical patent/CN118575543A/zh
Priority to PCT/JP2021/046612 priority patent/WO2023112277A1/fr
Publication of WO2023112277A1 publication Critical patent/WO2023112277A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems.
  • LTE Long Term Evolution
  • 3GPP Rel. 10-14 LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).
  • LTE successor systems for example, 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later
  • 5G 5th generation mobile communication system
  • 5G+ 5th generation mobile communication system
  • 6G 6th generation mobile communication system
  • NR New Radio
  • AI artificial intelligence
  • ML machine learning
  • RS reference signals
  • one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can realize suitable use of RS resources.
  • a terminal uses at least one of downlink control information (DCI) and a Medium Access Control (MAC) control element (Control Element (CE)), and a receiving unit that receives information about reference signals , when the resource of the reference signal based on the information about the reference signal and the resource of another reference signal different from the reference signal are configured to overlap, the reception of the reference signal and the other reference signal is performed. and a control unit for controlling.
  • DCI downlink control information
  • CE Medium Access Control
  • CE Control Element
  • suitable use of RS resources can be realized.
  • FIG. 1 is a diagram showing an example of setting reference signals according to option 1-1 of the first embodiment.
  • FIG. 2 is a diagram showing an example of setting reference signals according to option 1-2 of the first embodiment.
  • FIG. 3 is a diagram illustrating an example of conditions regarding reference signals according to the first embodiment.
  • 4A and 4B are diagrams illustrating examples of sampling of reference signals.
  • 5A and 5B are diagrams illustrating an example of mapping of reference signals according to the second embodiment.
  • FIG. 6 is a diagram illustrating another example of mapping of reference signals according to the second embodiment.
  • 7A and 7B are diagrams illustrating an example of mapping of reference signals according to option 2-2-1 of the second embodiment.
  • FIG. 8 is a diagram showing an example of mapping of reference signals according to option 2-2-2 of the second embodiment.
  • FIG. 9A and 9B are diagrams showing an example of sequence determination according to option 2-3-2 of the second embodiment.
  • 10A and 10B are diagrams showing an example of application of information on reference signals according to option 4-1 of the fourth embodiment.
  • 11A and 11B are diagrams showing an example of application of information on reference signals according to option 4-2 of the fourth embodiment.
  • FIG. 12 is a diagram illustrating an example of duplication of reference signals according to the fifth embodiment.
  • FIG. 13 is a diagram illustrating an example of PDSCH decoding time determination according to option 6-2 of the sixth embodiment.
  • FIG. 14 is a diagram showing an example bit width of the MAC CE/DCI field according to option 7-1 of the seventh embodiment.
  • FIG. 15 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment;
  • FIG. 15 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment;
  • FIG. 16 is a diagram illustrating an example of the configuration of a base station according to one embodiment.
  • FIG. 17 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment;
  • FIG. 18 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to an embodiment.
  • FIG. 19 is a diagram illustrating an example of a vehicle according to one embodiment;
  • AI artificial intelligence
  • channel estimation also referred to as channel measurement
  • decoding of received signals and the like.
  • Channel estimation for example, Channel State Information Reference Signal (CSI-RS), Synchronization Signal (SS), Synchronization Signal/Physical Broadcast Channel (SS/PBCH )) block, demodulation reference signal (DMRS), measurement reference signal (SRS), or the like.
  • CSI-RS Channel State Information Reference Signal
  • SS Synchronization Signal
  • SS/PBCH Synchronization Signal/Physical Broadcast Channel
  • DMRS demodulation reference signal
  • SRS measurement reference signal
  • AI artificial intelligence
  • ML machine learning
  • AI/ML complementation is being used to reduce resources for reference signals (RS) while maintaining channel estimation accuracy.
  • RS reference signals
  • RS reception measurement capable of high channel estimation accuracy
  • the following requirements may be required: - Transmitting and receiving RS in a wide band (contributes to the improvement of reception quality), - Repeated transmission of RSs to combine received channels/signals (combined reception) on the receiving side (contributes to improved reception quality); • High time/frequency density of RS resources (contributes to obtaining good time/frequency correlation).
  • mapping of reference signals (DMRS/PTRS) is performed with the following granularity: ⁇ For each configured grant PUSCH. • For each DCI format (DCI format 0_1/0_2/1_1/1_2). • For each PUSCH/PDSCH mapping type A or B. - Whether it is a PUSCH that transmits message A (Msg. A PUSCH).
  • the present inventors came up with a suitable RS resource allocation/utilization method.
  • each embodiment of the present disclosure may be applied when AI/ML/prediction is not used. In this case, it is possible to reduce the delay/overhead and change the configuration of the RS without RRC reconfiguration.
  • the UE/BS trains the ML model in training mode and implements the ML model in test mode (also called test mode, testing mode, etc.).
  • test mode also called test mode, testing mode, etc.
  • validation of the accuracy of the ML model trained in the training mode may be performed.
  • the UE/BS inputs channel state information, reference signal measurements, etc. to the ML model to obtain highly accurate channel state information/measurements/beam selection/position, future channel state information / Radio link quality etc. may be output.
  • AI may be read as an object (also called object, object, data, function, program, etc.) having (implementing) at least one of the following characteristics: Estimates based on observed or collected information; - Choices based on information observed or collected; • Predictions based on observed or collected information.
  • the object may be, for example, a terminal, a device such as a base station, or a device. Also, the object may correspond to a program included in the device.
  • an ML model may be read as an object that has (enforces) at least one of the following characteristics: Generating an estimate by feeding, Informed to predict estimates; ⁇ Discover characteristics by giving information, • Selecting actions by giving information.
  • the ML model may be read as at least one of AI model, predictive analytics, predictive analysis model, and the like. Also, the ML model may be derived using at least one of regression analysis (e.g., linear regression analysis, multiple regression analysis, logistic regression analysis), support vector machines, random forests, neural networks, deep learning, and the like. In this disclosure, model may be translated as at least one of encoder, decoder, tool, and the like.
  • regression analysis e.g., linear regression analysis, multiple regression analysis, logistic regression analysis
  • model may be translated as at least one of encoder, decoder, tool, and the like.
  • the ML model outputs at least one information such as estimated value, predicted value, selected action, classification, etc., based on the input information.
  • the UE and the BS are the relevant subjects in order to explain the ML model for communication between the UE and the BS, but the application of each embodiment of the present disclosure is not limited to this.
  • the UE and BS in the following embodiments may be read as the first UE and the second UE.
  • any UE, BS, etc. in this disclosure may be read as any UE/BS.
  • A/B and “at least one of A and B” may be read interchangeably.
  • activate, deactivate, indicate (or indicate), select, configure, update, determine, etc. may be read interchangeably.
  • supporting, controlling, controllable, operating, and capable of operating may be read interchangeably.
  • Radio Resource Control RRC
  • RRC parameters RRC parameters
  • RRC messages higher layer parameters
  • information elements IEs
  • settings may be read interchangeably.
  • MAC Control Element (CE) Medium Access Control Control Element
  • update command update command
  • activation/deactivation command may be read interchangeably.
  • indexes, IDs, indicators, and resource IDs may be read interchangeably.
  • sequences, lists, sets, groups, groups, clusters, subsets, etc. may be read interchangeably.
  • a beam report may be read interchangeably as a beam measurement report, a CSI report, a CSI measurement report, a predicted beam report, a predicted CSI report, and the like.
  • CSI-RS refers to Non Zero Power (NZP) CSI-RS, Zero Power (ZP) CSI-RS and CSI Interference Measurement (CSI-IM)). At least one may be read interchangeably.
  • NZP Non Zero Power
  • ZP Zero Power
  • CSI-IM CSI Interference Measurement
  • measured/reported RS may mean RS measured/reported for beam reporting.
  • timing, time, time, slot, subslot, symbol, subframe, etc. may be read interchangeably.
  • directions, axes, dimensions, polarizations, polarization components, etc. may be read interchangeably.
  • estimation, prediction, and inference may be read interchangeably. Also, in the present disclosure, estimate, predict, and infer may be read interchangeably.
  • the RS may be, for example, CSI-RS, SS/PBCH block (SS block (SSB)), and the like.
  • the RS index may be a CSI-RS resource indicator (CRI), an SS/PBCH block resource indicator (SS/PBCH block indicator (SSBRI)), or the like.
  • CSI feedback CSI feedback information
  • CSI report CSI report
  • CSI transmission CSI information, CSI, etc.
  • a subband may be interchanged with a physical resource block (PRB), a subcarrier, an arbitrary frequency resource unit, or the like.
  • PRB physical resource block
  • a subcarrier an arbitrary frequency resource unit, or the like.
  • the (particular) reference signal described in each embodiment of the present disclosure is a demodulation reference signal (DMRS), a phase tracking reference signal (PTRS), and others described in the present disclosure.
  • DMRS demodulation reference signal
  • PTRS phase tracking reference signal
  • any reference signal that is In this disclosure, reference signals, DMRS, PTRS, and any other reference signals described in this disclosure may be read interchangeably.
  • the reference signal described in each embodiment of the present disclosure may be a UL reference signal (reference signal for UL channel) or a DL reference signal (reference signal for DL channel) good too.
  • DMRS Downlink Reference Signal
  • assigning reference signals, mapping, transmitting, and receiving may be read interchangeably.
  • the UE may determine reference signal mapping according to at least one of options 1-1 to 1-3 below.
  • the UE may determine/select one reference signal configuration from multiple configurations regarding reference signals.
  • the determination/selection of the one reference signal configuration may be performed based on specific conditions/instructions from the base station. Specific conditions/instructions from the base station will be detailed later.
  • the UE when transmitting the UL channel (e.g., PUSCH), and at least one of receiving the DL channel (e.g., PDSCH) , may determine/select one reference signal setting (reference signal setting X or reference signal setting Y).
  • reference signal configuration X and reference signal configuration Y when transmitting the UL channel (e.g., PUSCH), and at least one of receiving the DL channel (e.g., PDSCH) , may determine/select one reference signal setting (reference signal setting X or reference signal setting Y).
  • the number of multiple reference signal settings may be two as described above, or may be two or more.
  • the reference signal setting X may be interchangeably read as the first reference signal setting
  • the reference signal setting Y may be interchangeably read as the second reference signal setting.
  • the UE may determine one reference signal configuration among multiple reference signal configurations to be the default reference signal configuration.
  • the default reference signal configuration may mean the configuration to select/determine when the UE has not received a signal specifying/instructing the selection/determination from the base station (network). .
  • a plurality of reference signal configurations are, for example, demodulation reference signal (DMRS) uplink configuration (eg, higher layer parameter “DMRS-UplinkConfig”) and demodulation reference signal (DMRS) downlink configuration (eg, higher layer parameter “DMRS-DownlinkConfig”).
  • DMRS demodulation reference signal
  • uplink configuration eg, higher layer parameter “DMRS-UplinkConfig”
  • DMRS-DownlinkConfig demodulation reference signal
  • a multiple reference signal setting may be a setting that includes at least one of the following elements/parameters: • The type of setup of the reference signal (eg DMRS). • Number of Code Division Multiplexing (CDM) groups (not used for data). - The number of additional DMRS (Additional DMRS) symbols. • Maximum number of OFDM symbols for front loaded DMRS. • Frequency resources (eg, subcarriers) for transmitting reference signals. • The symbol position of the first DMRS (eg starting DMRS) for a particular mapping type (eg mapping type A). • Frequency density/time density of PTRS. • The frequency (eg, subcarrier) offset of the PTRS. • Energy per resource element (EPRE) ratio of PTRS and DL channels (eg PDSCH). - PTRS transmit power boosting factor.
  • CDM Code Division Multiplexing
  • Additional DMRS Additional DMRS
  • Frequency resources eg, sub
  • FIG. 1 is a diagram showing an example of setting reference signals according to Option 1-1 of the first embodiment.
  • the UE selects/determines one reference signal setting from a plurality of reference signal settings (DMRS setting X and DMRS setting Y) based on a specific condition/instruction from the base station.
  • DMRS setting X and DMRS setting Y reference signal settings
  • DMRS configuration X includes PTRS configuration (elements/parameters related to PTRS, e.g., frequency density/time density of PTRS, frequency (e.g., subcarrier) offset of PTRS, PTRS and DL channel (e.g., EPRE ratio of PDSCH) and at least one of transmission power boosting factor of PTRS) are not included, and DMRS setting Y includes at least one setting of PTRS. Note that it may be arbitrary whether or not the configuration of the PTRS is included in the configuration of a plurality of reference signals.
  • the UE selects/determines one DMRS configuration (DMRS configuration X) based on specific conditions/instructions from the base station.
  • the UE may change/update some/all of the configuration with one reference signal configuration based on specific conditions/instructions from the base station.
  • the UE changes / updates the reference signal mapping type of the reference signal configuration (DMRS configuration) already selected / configured, and when transmitting the UL channel (eg, PUSCH) and the DL channel (eg, PDSCH) may be applied to at least one of the reception of
  • DMRS configuration the reference signal mapping type of the reference signal configuration
  • the changed/updated setting may be a setting that includes at least one of the following elements/parameters: • The type of setup of the reference signal (eg DMRS). • Number of Code Division Multiplexing (CDM) groups (not used for data). - The number of additional DMRS (Additional DMRS) symbols. • Maximum number of OFDM symbols for front loaded DMRS. • Frequency resources (eg, subcarriers) for transmitting reference signals. • The symbol position of the first DMRS (eg starting DMRS) for a particular mapping type (eg mapping type A). • Frequency density/time density of PTRS. • The frequency (eg, subcarrier) offset of the PTRS. • EPRE ratio of PTRS and DL channels (eg PDSCH). - PTRS transmit power boosting factor.
  • CDM Code Division Multiplexing
  • Additional DMRS Additional DMRS
  • Frequency resources eg, subcarriers
  • FIG. 2 is a diagram showing an example of setting reference signals according to option 1-2 of the first embodiment.
  • the UE changes some/all of the reference signal settings from the already set/selected reference signal settings (DMRS setting X) based on specific conditions/instructions from the base station.
  • DMRS setting X already set/selected reference signal settings
  • the UE receives information from the base station instructing to change the number of additional DMRS symbols. At this time, the UE changes the number of DMRS (additional DMRS) symbols based on the information.
  • the UE receives information from the base station instructing to change the maximum number of OFDM symbols for frontloaded DMRS. At this time, the UE changes the number of DMRS (additional DMRS) symbols based on the information.
  • the UE may first use option 1-1 above to select/determine one reference signal configuration for a certain channel. After that, the UE may change/update the reference signal configuration for the channel using options 1-2 above.
  • the UE may first use option 1-1 above to select/determine one reference signal configuration for a certain channel (first channel). The UE may then change/update the reference signal configuration for the first channel using options 1-2 above. Furthermore, the UE may select/determine one reference signal configuration for a channel (second channel) different from the current channel using option 1-1 above. The UE may then change/update the reference signal configuration for the second channel using options 1-2 above.
  • the UE may ignore the configuration/change of the first channel.
  • the UE may maintain the configuration/change of the first channel.
  • the UE may receive indication information regarding mapping of reference signals from the base station (network).
  • the indication information regarding mapping of reference signals may be received based on the method described in the third embodiment below.
  • the instruction information on mapping of reference signals may be information on reference signals described in the second embodiment below.
  • the UE when transmitting the UL channel (e.g., PUSCH), and at least one of when receiving the DL channel (e.g., PDSCH), based on whether or not a specific condition is satisfied, determines the mapping of the reference signal / may decide.
  • the UL channel e.g., PUSCH
  • the DL channel e.g., PDSCH
  • Specific conditions may be determined based on specific rules. Certain conditions may also be determined based on information received according to the method described in the third embodiment below.
  • the UE when transmitting the UL channel (e.g., PUSCH), and at least one of when receiving the DL channel (e.g., PDSCH), based on whether a specific condition is met, the mapping of the reference signal to apply and/or whether to apply information about the received reference signal.
  • the UL channel e.g., PUSCH
  • the DL channel e.g., PDSCH
  • the UE may determine to apply a specific reference signal configuration when a specific condition is satisfied. Also, the UE may decide to apply information on the received reference signals if certain conditions are met.
  • the UE may apply reference signal configuration based on a specific method if a specific condition is not met.
  • the specific method may be a reference signal setting method defined in existing specifications (eg, Rel.15/16).
  • the particular method may be the default setting in option 1-1 above.
  • the specific method may be a (default) setting to which the change (instruction) in option 1-2 above is not applied.
  • a particular condition may be at least one of the following conditions: - Whether reference signal bundling (eg DMRS bundling) is applied. - Whether or not at least one of UL channel (eg, PUSCH) transmission and DL channel (eg, PDSCH) reception is performed across multiple time resources (eg, slots). • Whether the resource (eg, RE) for receiving the configured CSI-RS overlaps with the mapping resource for the reference signal based on the received information. • Modulation order (for UL/DL channels). • Number of layers (for UL/DL channels). • Number of DMRS ports (for UL/DL channels). • DCI format to allocate (schedule/activate) UL channels (eg PUSCH)/DL channels (eg PDSCH).
  • DMRS bundling eg DMRS bundling
  • RNTI Radio Network Temporary Identifier
  • CRC Cyclic Redundancy Check
  • Per configured grant configuration index ConfiguredGrantConfigIndex
  • DMRS bundling means transmitting DMRS (for example, one) while maintaining equal power and phase continuity in multiple time resources (for example, slots).
  • time resources for example, slots
  • DMRS bundling, cross-slot channel estimation, cross-repetition channel estimation, and using common DMRS in multiple time resources may be read interchangeably.
  • UL channel / DL channel spanning multiple time resources eg, slots
  • time resources eg, slots
  • TB transport block
  • PUSCH PUSCH
  • DL channel e.g., PDSCH
  • the specific UL channel/DL channel is, for example, PUSCH of message A (eg, message A) for a random access procedure of a specific type (eg, type 2), configured grant (type 1/2) PUSCH, It may be at least one of a semi-persistent scheduling (SPS) PDSCH and a DCI scheduled/activated PUSCH/PDSCH.
  • SPS semi-persistent scheduling
  • the RNTI may be, for example, at least one of Cell (C-) RNTI, Configured Scheduling (CS-) RNTI, Modulation Coding Scheme Cell (MCS-C-) RNTI, and any other RNTI.
  • C- Cell
  • CS- Configured Scheduling
  • MCS-C- Modulation Coding Scheme Cell
  • the index of the configured grant to be applied to the DCI/MAC CE including the information on the reference signal may be included.
  • DCI that allocates (schedules/activates) UL channels (eg, PUSCH)/DL channels (eg, PDSCH) includes information on reference signals will be described in detail in the fourth embodiment below.
  • the UE velocity/UE velocity direction may be based on, for example, whether or not the UE is identified as being included in a specific mobile object (eg, car, train).
  • the speed of the UE/direction of speed/the identity of the UE may be determined by the UE (e.g., based on sensors the UE has), and information about the speed/direction of the UE/the identity of the UE may be obtained from the base station. You may be notified and determined.
  • the specific condition may be a combination of at least two of the multiple examples of the above specific conditions.
  • the UE may apply information about reference signals included in DCI/MAC CE if certain conditions are met.
  • part/all of the setting by one reference signal setting may be changed/updated based on the information on the reference signal included in the DCI/MAC CE.
  • FIG. 3 is a diagram showing an example of conditions regarding reference signals according to the first embodiment.
  • the UE makes a decision based on whether DMRS bundling is applied.
  • the UE determines whether or not PUSCH transmission opportunities for multiple slots are set/instructed for 1 TB allocation. If the UE determines that DMRS bundling is not applied, it determines to apply DMRS configuration A.
  • the UE when the UE determines that multiple slots of PUSCH transmission opportunities are configured/instructed for allocation of 1 TB, it determines that DMRS configuration B is applied. If the UE determines that multi-slot PUSCH transmission opportunities are not configured/indicated for the 1 TB allocation, it determines to apply DMRS configuration A.
  • DMRS settings A and B are merely examples, and the setting name and the number to be set are not limited to these.
  • the UE may receive information on reference signals from the base station (network).
  • the information about the reference signal may include the index of the reference signal configuration applied to the mapping of the reference signal.
  • the index of the reference signal configuration to be applied to the mapping of the reference signal may be an index that indicates one reference signal configuration to be applied among multiple reference signal configurations.
  • the UE may apply the default reference signal configuration if it does not receive information about the reference signal including the index of the reference signal configuration.
  • the default reference signal may be determined according to a specific rule, or may be determined based on RRC signaling configuration.
  • the information about reference signals may include parameters for setting reference signals.
  • the parameter may be at least one of the following parameters: • The type of setup of the reference signal (eg DMRS). • Number of Code Division Multiplexing (CDM) groups (not used for data). - The number of additional DMRS (Additional DMRS) symbols. • Maximum number of OFDM symbols for front loaded DMRS. • Frequency resources (eg, subcarriers) for transmitting reference signals. • The symbol position of the first DMRS (eg starting DMRS) for a particular mapping type (eg mapping type A). • Frequency density/time density of PTRS. • The frequency (eg, subcarrier) offset of the PTRS.
  • the sampling offset may be an offset value for determining the symbol for starting sampling.
  • a sampling offset may be an offset value for determining a subcarrier to start sampling.
  • sampling of reference signals may mean determining/changing symbols/subcarriers to/from which reference signals are mapped.
  • FIG. 4A and 4B are diagrams showing an example of sampling of reference signals.
  • the UE determines DMRS symbols based on the indicated sampling interval and offset.
  • Information about reference signals may include information about time resources to which reference signals are not mapped. Information about time resources to which reference signals are not mapped may be determined according to at least one of options 2-1-1 to 2-1-3 below.
  • the information about time resources to which reference signals are not mapped may be information indicating symbols to which reference signals are not mapped.
  • Information indicating symbols to which no reference signal is mapped may be a bitmap.
  • the UE may determine symbols to which reference signals are not mapped based on information (bitmap) indicating symbols to which reference signals are not mapped.
  • the UE assumes (expects) that no reference signal is mapped in (OFDM) symbols corresponding to bits whose indicated bitmap value is the first value (e.g., 1 (or may be 0)). / You may judge.
  • Each bit (value) of the bitmap may correspond to one or more symbols.
  • Each bit (value) of the bitmap may correspond to X symbols (where X is an integer such that X ⁇ 1).
  • the X may be specified in advance, may be determined based on a specific rule, may be configured by RRC signaling, or may be determined based on reporting of UE capability information. may be
  • bitmap length may be specified in advance, may be determined based on a specific rule, may be set by RRC signaling, or may be UE capability information. ) reports.
  • the length of the bitmap may be N slots/number of symbols of the reference signal in the repeated transmission.
  • the length of the bitmap may be the number of symbols of the additional reference signal (eg, additional DMRS) plus M.
  • the length of the bitmap may be determined based on the number of allocated symbols for the UL channel (eg, PUSCH)/DL channel (eg, PDSCH). For example, the bitmap length may be the number of allocated symbols for the UL channel (eg, PUSCH)/DL channel (eg, PDSCH).
  • repeated transmission/TBoMS is applied to UL channel (e.g. PUSCH)/DL channel (e.g. PDSCH), number of symbols of reference signal in N slots/repeated transmission, number of symbols of additional reference signal plus M and the number of allocated symbols for the UL channel/DL channel multiplied by the number of repetitions/number of allocated slots.
  • UL channel e.g. PUSCH
  • DL channel e.g. PDSCH
  • the length of the bitmap is N slots/the number of symbols of the reference signal in the repeated transmissions
  • an additional A value obtained by multiplying at least one of a value obtained by adding M to the number of reference signal symbols and the number of symbols assigned to the UL channel/DL channel by the number of repetitions/the number of assigned slots may be used.
  • repeated transmission/TBoMS is applied to UL channel (e.g. PUSCH)/DL channel (e.g. PDSCH), in each slot, number of symbols of reference signal in N slots/repeated transmission, number of symbols of additional reference signal
  • the length of the bitmap may be determined based on at least one of a value obtained by adding M to , and the number of allocated symbols for the UL channel/DL channel. For example, if repeated transmissions/TBoMS are applied to the UL channel (e.g. PUSCH)/DL channel (e.g. PDSCH), the bitmap length is N slots/symbols of the reference signal within the repeated transmission in each slot. number, a value obtained by adding M to the number of additional reference signal symbols, and the number of allocated symbols of the UL channel/DL channel.
  • the length of the bitmap may be determined based on the number of repetitions in allocatable slots based on the RRC parameters.
  • the bitmap length may be the number of repetitions in allocatable slots based on the RRC parameters.
  • the length of the bitmap is equal to the number of symbols of the reference signal in N slots/repeated transmission, plus the number of symbols of the additional reference signal. It may be determined based on a value obtained by multiplying at least one of the value obtained by adding M and the number of symbols to be assigned to the UL channel/DL channel and multiplying the value by 1/X and rounding it up.
  • bit (value) in the bitmap corresponds to multiple (X) symbols
  • the length of the bitmap is N slots/number of reference signal symbols in repeated transmissions
  • additional reference signal symbols A value obtained by multiplying at least one of a value obtained by adding M to the number and the number of symbols assigned to the UL channel/DL channel and multiplying the value by 1/X and rounding up the value may be used.
  • the UE may receive indices associated with bitmaps based on RRC signaling/specific rules using DCI/MAC CE.
  • FIGS. 5A and 5B are diagrams showing examples of mapping of reference signals according to the second embodiment.
  • a bitmap with a bit length equal to the number of symbols of reference signals (DMRS) in one slot is indicated to the UE.
  • the number of repeated transmissions is two, and the number of symbols (X above) corresponding to each bit of the bitmap is two.
  • the UE maps the DMRS to the DMRS OFDM symbol corresponding to 0, and maps the DMRS to the DMRS OFDM symbol corresponding to 1. Determine that the DMRS is not mapped.
  • FIG. 5B shows the case where the bitmap indicated to the UE is applied to each slot.
  • the number of repeated transmissions is two
  • the number of symbols (X above) corresponding to each bit of the bitmap is two.
  • the UE maps the DMRS to the DMRS OFDM symbol corresponding to 0 in each slot, and 1 to 1. It is determined that no DMRS is mapped to the corresponding DMRS OFDM symbol.
  • the information about time resources to which reference signals are not mapped may be information indicating slots to which reference signals are not mapped.
  • Information indicating slots to which no reference signal is mapped may be a bitmap.
  • the UE may determine slots to which reference signals are not mapped based on information (bitmap) indicating slots to which reference signals are not mapped.
  • the UE assumes (expects)/determines that the reference signal is not mapped in the slot corresponding to the bit whose indicated bitmap value is the first value (eg, 1 (or may be 0)).
  • Each bit (value) of the bitmap may correspond to one or more slots.
  • Each bit (value) of the bitmap may correspond to X slots (X is an integer of X ⁇ 1).
  • the X may be specified in advance, may be determined based on a specific rule, may be configured by RRC signaling, or may be determined based on reporting of UE capability information. may be
  • bitmap length may be specified in advance, may be determined based on a specific rule, may be set by RRC signaling, or may be UE capability information. ) reports.
  • the bitmap length may be determined based on the number of repetitions if repeated transmissions are applied to the UL channel (eg PUSCH)/DL channel (eg PDSCH). For example, the bitmap length may be the number of repetitions if repeated transmissions are applied to the UL channel (eg PUSCH)/DL channel (eg PDSCH).
  • the bitmap length may be determined based on the number of allocated slots when TBoMS is applied to the UL channel (eg, PUSCH)/DL channel (eg, PDSCH). For example, the bitmap length may be the number of allocated slots when TBoMS is applied on the UL channel (eg, PUSCH)/DL channel (eg, PDSCH).
  • the length of the bitmap may be determined based on the number of repetitions in allocatable slots based on the RRC parameters.
  • the bitmap length may be the number of repetitions in allocatable slots based on the RRC parameters.
  • the bitmap length may be determined based on the maximum number of repetitions/number of allocated slots configured in RRC signaling.
  • the bitmap length may be the maximum number of repetitions/number of allocated slots configured in RRC signaling. In this case, the bitmap length can be determined without depending on the contents of the DCI.
  • the length of the bitmap is the number of repetitions, the number of allocated slots, the number of repetitions in allocatable slots based on RRC parameters, and It may be determined based on a value obtained by multiplying at least one of the maximum number of repetitions/number of allocated slots configured in RRC signaling and multiplying by 1/X, rounded up.
  • the length of the bitmap is the number of repetitions, the number of allocated slots, the number of repetitions in allocatable slots based on RRC parameters, Also, it may be a value obtained by multiplying at least one of the maximum number of repetitions/number of allocated slots set by RRC signaling and rounding up the value obtained by multiplying 1/X.
  • the UE may receive indices associated with bitmaps based on RRC signaling/specific rules using DCI/MAC CE.
  • FIG. 6 is a diagram showing another example of mapping of reference signals according to the second embodiment.
  • the number of repeated transmissions is 4, and the number of slots (X above) corresponding to each bit of the bitmap is 2.
  • the UE determines that the slot corresponding to 0 is mapped with DMRS and the slot corresponding to 1 is not mapped with DMRS. do.
  • DMRS is mapped in the first two slots, and DMRS is not mapped in the following two slots.
  • Information about reference signals may include information about frequency resources to which reference signals are not mapped.
  • the information about frequency resources to which reference signals are not mapped may be information indicating subcarriers to which reference signals are not mapped.
  • Information about frequency resources (eg, subcarriers) to which reference signals are not mapped may be determined according to at least one of options 2-2-1 to 2-2-3 below.
  • Information about subcarriers to which reference signals are not mapped may be information based on information specifying (limiting) sequence values corresponding to frequency resources of reference signals.
  • the sequence may be an Orthogonal Cover Code (OCC) sequence (eg, w f (k′) and/or wt (k′)).
  • OCC Orthogonal Cover Code
  • the value of the series (for example, the value designated (limited) as k') may be the first value (for example, "0") or the second value (for example, "1").
  • the UE determines the reference signal based on the formula for the reference signal sequence given in Equation 1 below. Mapping may be determined.
  • ⁇ k,l (p, ⁇ ) in Equation 1 above is a complex value of RE(k, l) corresponding to antenna port p and subcarrier spacing setting ⁇ .
  • ⁇ PDSCH DMRS is the scaling factor of the reference signal
  • w f is the OCC sequence in the frequency direction
  • w t is the OCC sequence in the time direction
  • r is the sequence of the reference signal.
  • k is a subcarrier index
  • l is a symbol index
  • ⁇ indicates an offset value.
  • the above formula 1 differs from the formula defined by the existing specifications (up to Rel. 16) in that the variable of the series r is only n. By using it for the mapping of the reference signal in Equation 1 above, even when k' is limited, the values of the sequence can be used as continuous values.
  • the UE determines the reference signal based on the formula for the reference signal sequence given in Equation 2 below. Mapping may be determined.
  • Equation 2 is the same as the formula relating to mapping of reference signals (PDSCH DMRS) defined in existing specifications (up to Rel. 16).
  • PDSCH DMRS mapping of reference signals
  • Equations 1 and 2 above may be appropriately applied not only to the DL channel (eg PDSCH) but also to the UL channel (eg PUSCH).
  • the parameters for PDSCH may be appropriately read and applied to PUSCH.
  • the UE may assume that the reference signal is not multiplexed between the UEs when the value (k') of the sequence is different between the UEs.
  • the UE may determine possible values of the sequence value (k') based on the DMRS port.
  • FIGS. 7A and 7B are diagrams showing an example of mapping of reference signals according to option 2-2-1 of the second embodiment.
  • the UE receives the information based on the information specifying (limiting) the sequence values corresponding to the frequency resources of the reference signals, it performs reference signal mapping as described in FIGS. 7A and 7B.
  • the UE determines the corresponding reference signal mapping when the value of k' is limited to 0 and when the value of k' is limited to 1, respectively.
  • the UE determines the corresponding reference signal mapping when the value of k' is limited to 0 and when the value of k' is limited to 1, respectively.
  • the information about frequency resources to which reference signals are not mapped may be information indicating subcarriers to/from which reference signals are not mapped.
  • Information indicating subcarriers to/from which reference signals are not mapped may be a bitmap.
  • the UE may determine subcarriers to/from which reference signals are mapped based on information (bitmap) indicating subcarriers to/from which reference signals are not mapped.
  • the UE assumes (expects)/determines that the reference signal is not mapped in the subcarriers corresponding to the bits whose indicated bitmap values are the first value (eg, 0 (or may be 1)). You may
  • Each bit (value) of the bitmap may correspond to one or more subcarriers.
  • Each bit (value) of the bitmap may correspond to X (X is an integer of X ⁇ 1) subcarriers.
  • the X may be specified in advance, may be determined based on a specific rule, may be configured by RRC signaling, or may be determined based on reporting of UE capability information. may be
  • Each bit (value) of the bitmap may correspond to the variable n in at least one of Equation 1 and Equation 2 above.
  • the bitmap length may be specified in advance, may be determined based on a specific rule, may be set by RRC signaling, or may be reported in UE capability information. may be determined based on
  • the length of the bitmap may be determined based on the maximum number of reference signal subcarriers mappable in Y (where Y is an integer equal to or greater than 1) RB/RE.
  • the bitmap length may be the maximum number of reference signal subcarriers that can be mapped in Y RB/REs.
  • the Y may be specified in advance, may be determined based on a specific rule, may be set by RRC signaling, or may be determined based on reporting of UE capability information. may be
  • the length of the bitmap is the number of allocated subcarriers and Y (Y is an integer of 1 or more) RB/ Maximum number of subcarriers of reference signals that can be mapped in RE, number defined in advance in specifications, number determined based on specific rules, number set by RRC signaling, and UE capability information , multiplied by 1/X, rounded up.
  • the length of the bitmap is the number of allocated subcarriers and Y (Y is an integer of 1 or more) RB
  • Y is an integer of 1 or more
  • the UE may receive indices associated with bitmaps based on RRC signaling/specific rules using DCI/MAC CE.
  • FIG. 8 is a diagram showing an example of mapping of reference signals according to option 2-2-2 of the second embodiment.
  • FIG. 8 shows a case where the bitmap length is the number of subcarriers (here, 6) of reference signals mapped to 1 RB (12 subcarriers).
  • FIG. 8 shows a case where "101010” or "010001" is notified to the UE as the bitmap value.
  • the UE determines that reference signals are mapped to subcarriers corresponding to '1' and no reference signals are mapped to subcarriers corresponding to '0'.
  • the most significant bit (MSB) of the bitmap corresponds to the lowest subcarrier.
  • (LSB) may correspond to the lowest subcarrier.
  • the UE may determine a sequence (eg, OCC sequence) in the frequency direction (frequency domain) regarding mapping of reference signals.
  • a sequence eg, OCC sequence
  • the UE may determine the sequence in the frequency direction for reference signal mapping based on at least one of the following options 2-3-1 and 2-3-2.
  • the UE determines whether to apply option 2-3-1/2-3-2 or whether to apply either option 2-3-1 and 2-3-2 according to a specific rule. may be set by RRC signaling, or may be determined based on information on reference signals included in DCI/MAC CE.
  • option 2-3-1/2-3-2 When the UE applies option 2-3-1/2-3-2, other UEs that do not apply option 2-3-1/2-3-2 (same option), and options that the UE applies It may be assumed that inter-UE multiplexing of reference signals is not performed with at least one other UE applying a different option.
  • the UE may assume/determine the value of the sequence in the frequency direction (eg, the OCC sequence) (eg, the value of w f (k′) in Equations 1 and 2 above) to be a fixed value.
  • the fixed value may be 1 (or may be -1).
  • the number of applicable DMRS ports is a specific value (for example, 1000 or 1001 (offset ( ⁇ ) may be limited to only 0 or 1) respectively. Also, different reference signal (eg, DMRS) ports may be configured based on the value of k'.
  • the number of applicable DMRS ports is a specific value (eg, 1000, 1001 or 1002 (offset ( ⁇ ) may be limited to only 0, 2 or 4) respectively.
  • the CDM groups at ports 1000, 1001 and 1002 may be 0, 1 and 2 respectively.
  • different reference signal (eg, DMRS) ports may be configured based on the value of k'.
  • ⁇ Option 2-3-2 ⁇ UE calculates a frequency direction sequence (eg, OCC sequence) based on a specific number (eg, N (N is an integer of 1 or more)) of a specific sequence, and maps the reference signal to the specific number of subcarriers may be applied to each
  • the specific sequence may be, for example, a cyclic shift sequence.
  • the UE may determine a sequence in the frequency direction at each reference signal (DMRS) port based on N cyclic shift sequences of sequence length N whose rotation phase amount is shifted by 2 ⁇ /N.
  • DMRS reference signal
  • the N may be specified in advance, may be determined based on a specific rule, may be set by RRC signaling, or may be based on information on reference signals included in DCI/MAC CE. may be determined by
  • option 2-3-2 it can be preferably applied when the reference signal is mapped to N subcarriers, and multiplexing for N UEs (inter-UE multiplex) is possible.
  • FIGS. 9A and 9B are diagrams showing an example of sequence determination according to option 2-3-2 of the second embodiment.
  • the example shown in FIGS. 9A and 9B shows the case where the above N is 3.
  • FIG. 9A and 9B shows the case where the above N is 3.
  • the UE generates OCC sequences in the frequency direction at each reference signal (DMRS) port based on three cyclic shift sequences (see FIG. 9A ) whose sequence length is 3 and whose rotation phase amount is shifted by 2 ⁇ /3. may decide.
  • This method can be preferably applied when a reference signal is allocated for each subcarrier divided by 3 from the total number of subcarriers to be allocated.
  • the UE may apply the OCC sequence every 4 subcarriers in the entire RB. Also, the UE may apply the OCC sequence to every third subcarrier out of the subcarriers to which the DMRS is mapped.
  • the second embodiment it is possible to appropriately define/determine information on reference signals for determining mapping of reference signals.
  • the UE may receive information about reference signals using higher layer signaling (RRC signaling/MAC CE)/physical layer signaling (DCI).
  • RRC signaling/MAC CE higher layer signaling
  • DCI physical layer signaling
  • a UE may receive one or more reference signal configurations using RRC signaling.
  • One or more (or multiple) reference signal configurations may be configured for the UE.
  • One or more (or multiple) resource mappings of reference signals may be configured for the UE.
  • the condition of which reference signal to apply among a plurality of reference signal configurations may be set using RRC signaling.
  • the mapping of the reference signal may be associated with the Time Domain Resource Assignment (TDRA) of the UL channel (eg, PUSCH)/DL channel (eg, PDSCH).
  • TDRA Time Domain Resource Assignment
  • each row index of TDRA may be associated with each reference signal mapping setting.
  • the UE may determine to apply the reference signal configuration corresponding to the row index indicated by the DCI when scheduling the UL channel (eg, PUSCH)/DL channel (eg, PDSCH).
  • the UE may receive at least one piece of information regarding the reference signal in the second embodiment using RRC signaling.
  • the UE may receive instructions regarding one or more reference signal configurations using MAC CE.
  • the UE may be instructed using MAC CE which reference signal configuration to apply among multiple reference signal configurations configured using RRC signaling.
  • the UE may receive at least one piece of information regarding the reference signal in the second embodiment using MAC CE.
  • the UE may receive information about reference signals using DCI.
  • the DCI may be a DCI that is transmitted individually to the UE.
  • the DCI may be a DCI transmitted in a UE-specific control resource set (CORESET)/PDCCH/search space set.
  • the RNTI that scrambles the CRC of the DCI may be a specific RNTI (eg, C-RNTI/CS-RNTI/MCS-C-RNTI).
  • each UE can report to the base station (network) whether the DCI has been decoded.
  • This DCI may be a DCI that schedules/activates UL channels (eg, PUSCH)/DL channels (eg, PDSCH).
  • UL channels eg, PUSCH
  • DL channels eg, PDSCH
  • the DCI may be a DCI (groupcast/multicast DCI) that is commonly transmitted to multiple UEs.
  • the DCI may be DCI transmitted in a control resource set (CORESET)/PDCCH/search space set common to multiple UEs.
  • the RNTI that scrambles the CRC of the DCI may be an existing RNTI (for example, C-RNTI/CS-RNTI/MCS-C-RNTI) or another (newly defined RNTI).
  • the UE may determine the discrimination information regarding the RNTI to be used based on a specific rule, may determine based on the setting by RRC signaling, or may determine the reference signal received using DCI/MAC CE may be determined based on information about
  • the UE may be configured with PDCCH/CORESET/search space for receiving the DCI.
  • the UE may report/transmit HARQ-ACK information for the DCI.
  • the UE reports HARQ-ACK information about decoding of the DCI after a specific number (eg, N (N is an integer of 1 or more)) symbols/slots/ms from the last symbol of the PDCCH corresponding to the received DCI.
  • N may be determined based on a specific rule, may be determined based on the configuration by RRC signaling, may be determined based on the report of UE capability information, may be determined based on the received DCI may be determined for each neuronology (eg, subcarrier spacing setting) based on the
  • a UE may transmit HARQ-ACK (NACK) information only when transmitting ACK (or NACK) when receiving information on reference signals using a DCI common to multiple UEs.
  • NACK HARQ-ACK
  • the UE may transmit/report information identifying the UE (eg, C-RNTI) in addition to HARQ-ACK information.
  • C-RNTI information identifying the UE
  • the UE may be instructed to use DCI for one reference signal configuration among multiple reference signal configurations configured using RRC signaling/MAC CE.
  • the UE may receive at least one piece of information regarding the reference signal in the second embodiment using DCI.
  • the third embodiment it is possible to appropriately notify/transmit/receive information about reference signals.
  • the fourth embodiment describes a period of applying information on reference signals.
  • the UE may determine the period for applying information on reference signals according to at least one of options 4-1 to 4-3 below.
  • a UL channel e.g., PUSCH
  • DL channel e.g., PDSCH
  • the UL channel/DL channel may include at least one of SPS PDSCH, configured grant (CG) PUSCH (for example, CG type 2 PUSCH), and repeated transmission of PUSCH/PDSCH.
  • CG configured grant
  • the UE may apply the information on the reference signal included in the DCI to all of the UL/DL channels.
  • the UE may receive a specified number of transmission/reception opportunities (e.g., N times) from the first transmission/reception opportunity of the UL/DL channel.
  • Information about reference signals included in the DCI may be applied to the UL channel/DL channel.
  • the N may be determined based on a specific rule, may be determined based on configuration by RRC signaling, or may be determined based on reporting UE capability information.
  • the UE When the UL/DL channel is scheduled/activated by DCI, the UE shall select the reference signal included in the DCI for the UL/DL channel at the first transmission/reception opportunity among the UL/DL channels. may apply.
  • FIGS. 10A and 10B are diagrams showing an example of application of information on reference signals according to option 4-1 of the fourth embodiment.
  • the UE receives DCI that activates the CG PUSCH.
  • the DCI includes information indicating addition of one additional DMRS as information on the reference signal.
  • the UE applies the information on the reference signal included in the DCI to (all of) the CG PUSCHs activated by the DCI.
  • the UE applies the information on the reference signal included in the DCI to the CG PUSCH in the first transmission opportunity among the CG PUSCHs activated by the DCI.
  • the UE does not apply information about reference signals included in DCI to CG PUSCHs other than the CG PUSCH in the first transmission opportunity.
  • Option 4-2 mainly describes the timing of applying information on reference signals (starting application of information on reference signals).
  • the UE may determine/determine the timing to start applying information on reference signals according to at least one of options 4-2-1 to 4-2-3 below.
  • the UE receives the information on the reference signal (including DCI/MAC CE), the time resources (symbols/slots/subslots) after a certain number (eg, N) of time resources (symbols/slots/subslots/ms) ), the application of the information on the reference signal may be started.
  • UE from the transmission of the UL channel (eg, PUCCH / PUSCH) containing HARQ-ACK information corresponding to the information on the reference signal (including DCI / MAC CE), a specific number (eg, N) time resources (symbol / (slot/subslot/ms) later time resource (symbol/slot/subslot), the application of the information on the reference signal may start.
  • the UL channel eg, PUCCH / PUSCH
  • HARQ-ACK information corresponding to the information on the reference signal including DCI / MAC CE
  • a specific number eg, N
  • time resources symbol / (slot/subslot/ms) later time resource (symbol/slot/subslot
  • a DCI that schedules/activates a UL channel (e.g., PUSCH)/DL channel (e.g., PDSCH) includes information about reference signals
  • the UE may specify the specific UL channel/DL channel that is scheduled/activated by that DCI.
  • the application of the information on that reference signal may start in the (eg, first) UL/DL channel time resources (symbols/slots/subslots).
  • N in options 4-2-1 to 4-2-3 above may be 0 or more.
  • N in the above options 4-2-1 to 4-2-3 may be specified in advance, may be determined by a specific rule, may be set using RRC signaling, It may be determined based on UE capability information, may be determined based on information about reference signals included in DCI/MAC CE, or may be determined based on received DCI/MAC CE by neumerology (for example, sub setting of carrier spacing).
  • Whether any of the above options 4-2-1 to 4-2-3 is applied may be specified in advance, may be determined by a specific rule, or may be set using RRC signaling. may be determined based on UE capability information, or may be determined based on information on reference signals included in DCI/MAC CE.
  • any specific UL channel / DL channel may be determined by a specific rule, may be configured using RRC signaling, UE capability information or based on information on the reference signal included in the DCI/MAC CE.
  • the particular UL channel/DL channel is, for example, at least one of a PUSCH carrying message A, a CG (Type 1/2) PUSCH, an SPS PDSCH, and a DCI scheduled/activated PUSCH/PDSCH, good too.
  • FIG. 11A and 11B are diagrams showing an example of application of information on reference signals according to option 4-2 of the fourth embodiment.
  • N slots after the last symbol of reception of DCI/MAC CE containing information on reference signals the application of the information starts (option 4-2-1 above).
  • the application of the information starts N slots after the transmission of the HARQ-ACK information corresponding to the information on the reference signal (option 4-2-2 above).
  • Option 4-3 mainly describes the timing of ending the application of information on reference signals.
  • the UE may determine/determine the timing to terminate application of information on reference signals according to at least one of options 4-3-1 to 4-3-9 below.
  • the UE receives a time resource (symbol/ slot/sub-slot), the application of the information on the reference signal may be terminated.
  • the UE may stop applying information on the reference signal in time resources (symbols/slots/subslots) after entering RRC inactive mode/RRC idle mode.
  • the UE receives the information (including DCI/MAC CE) about the new reference signal, and after a certain number (eg, M) time resources (symbols/slots/subslots/ms) later time resources (symbols/slots/ sub-slot), the application of the information on the reference signals up to that point may be terminated.
  • a certain number eg, M
  • the UE may stop applying the information on the previous reference signal at the timing of (starting) the application of the information on the new reference signal (including DCI/MAC CE).
  • the application (start) timing of the information on the new reference signal may be at least one of the timings described in option 4-2 above.
  • the UE receives the information on the reference signal (including DCI/MAC CE), the time resource (symbol/slot/subslot) after a certain number (e.g., M) of time resources (symbol/slot/subslot/ms) ), the application of the information on the reference signal may be terminated.
  • UE from the transmission of the UL channel (eg, PUCCH / PUSCH) containing HARQ-ACK information corresponding to the information on the reference signal (including DCI / MAC CE), a specific number of (eg, M) time resources (symbol / (slot/subslot/ms) later time resource (symbol/slot/subslot), the application of the information on the reference signal may be terminated.
  • the UL channel eg, PUCCH / PUSCH
  • HARQ-ACK information corresponding to the information on the reference signal including DCI / MAC CE
  • the UE may select one of the UL channels/DL channels scheduled/activated by that DCI.
  • a time resource eg, M
  • a certain number eg, M
  • time resources e.g, symbols/slot/subslot/ms
  • the application of the information on the reference signal may be terminated.
  • the UE selects a UL channel (e.g., PDSCH) containing HARQ-ACK information corresponding to the (last) DL channel to be scheduled/activated PUCCH/PUSCH) transmission, in time resources (symbols/slots/subslots) after a specific number (e.g., M) of time resources (symbols/slots/subslots/ms), apply information on the reference signal. may be terminated.
  • a UL channel e.g., PDSCH
  • M specific number
  • the UE starts applying information on reference signals after a certain number (eg, M) of time resources (symbols/slots/subslots/ms) and after L UL channel transmissions/DL channel receptions. , the application of information on the reference signal may be terminated in time resources (symbols/slots/subslots) in at least one of .
  • N and L in options 4-3-1 to 4-3-9 above may be 0 or more.
  • N and L in options 4-3-1 to 4-3-9 above may be specified in advance, may be determined by specific rules, or may be set using RRC signaling and may be determined based on UE capability information, may be determined based on information about reference signals included in DCI/MAC CE, or may be determined based on received DCI/MAC CE by numerology (e.g. , setting of subcarrier spacing).
  • Whether any of the above options 4-3-1 to 4-3-9 is applied may be specified in advance, may be determined by a specific rule, or may be set using RRC signaling. may be determined based on UE capability information, or may be determined based on information on reference signals included in DCI/MAC CE.
  • any specific UL channel / DL channel may be determined by a specific rule, may be configured using RRC signaling, UE capability information or based on information on the reference signal included in the DCI/MAC CE.
  • the particular UL channel/DL channel is, for example, at least one of a PUSCH carrying message A, a CG (Type 1/2) PUSCH, an SPS PDSCH, and a DCI scheduled/activated PUSCH/PDSCH, good too.
  • first reference signal overlaps with another reference signal (second reference signal) different from the reference signal.
  • the first reference signal may mean the reference signal in the first to fourth and sixth to ninth embodiments.
  • the second reference signal may be, for example, CSI-RS.
  • the UE does not include an indication that the first reference signal resource and the second reference signal resource indicated by the information overlap in the information (including DCI/MAC CE) regarding the first reference signal. can be assumed.
  • the resources of the first reference signal may be, for example, at least one of DMRS resources, CDM group DMRS resources associated with PDSCH potential DMRS ports, and PTRS resources.
  • the CDM group associated with the potential DMRS port may mean a CDM group for DMRS mapped to contiguous/discontinuous resources in the frequency direction to which DMRS may be mapped.
  • the UE may operate according to certain rules.
  • the specific rule may be at least one of options 5-1 to 5-3 below.
  • the UE may apply the information regarding the first reference signal.
  • the UE may not receive/decode the (resources of) the second reference signal that overlaps (resources of) the first reference signal.
  • the UE may not apply the information regarding the first reference signal.
  • the UE may not apply all of the information regarding the first reference signal.
  • the UE may apply part of the information regarding the first reference signal and not apply the rest of the information regarding the first reference signal.
  • the UE may apply the information by changing the resource for mapping the first reference signal so as not to overlap with the second reference signal.
  • the UE maps the first reference signal so that the portion of the first reference signal that overlaps with the second reference signal does not overlap with the second reference signal.
  • the resources to be used may be staggered by a certain number of symbols.
  • Whether any of the above options 5-1 to 5-3 is applied may be specified in advance, may be determined by a specific rule, or may be set using RRC signaling. and may be determined based on UE capability information.
  • FIG. 12 is a diagram showing an example of duplication of reference signals according to the fifth embodiment.
  • the UE is receiving the SPS PDSCH.
  • the first reference signal (PDSCH DMRS) and the second reference signal (CSI-RS) do not overlap.
  • the UE receives information on the first reference signal and transmits additional DMRS at the third reception opportunity.
  • the above option 5-2 and 5-3 may apply.
  • PDSCH process operation time may mean the elapsed time (symbols) from the last symbol of PDSCH until the HARQ-ACK corresponding to the PDSCH is transmitted.
  • the PDSCH process operation time may be determined based on the PDSCH decoding time (PDSCH decoding time).
  • PDSCH decoding time (PDSCH decoding time) may be included in PDSCH process operation time (PDSCH processing procedure time).
  • the PDSCH process operation time (PDSCH processing procedure time) / PDSCH decoding time (PDSCH decoding time) is determined based on at least one of the following options 6-1 and 6-2 / You may judge.
  • the UE determines the PDSCH processing procedure time/PDSCH decoding time based on certain higher layer (RRC) parameters/ may decide.
  • RRC higher layer
  • the specific higher layer (RRC) parameter may be information about additional DMRS positions (eg, dmrs-AdditionalPosition) included in the DL DMRS configuration (eg, DMRS-downlinkConfig).
  • the specific higher layer (RRC) parameters may be parameters that are set before receiving information on reference signals.
  • the UE may determine/determine the PDSCH processing procedure time/PDSCH decoding time based on information about the reference signal.
  • the information about the reference signal may be information about the number of additional reference signal symbols (for example, the number of additional DMRS OFDM symbols).
  • a setting of PDSCH processing procedure time/PDSCH decoding time corresponding to the number of additional reference signal symbols may be defined.
  • FIG. 13 is a diagram showing an example of PDSCH decoding time determination according to option 6-2 of the sixth embodiment.
  • the UE determines/determines PDSCH processing procedure time/PDSCH decoding time based on the correspondence (eg, table) shown in FIG. 13 .
  • the number of OFDM symbols of the additional DMRS is 0, whether the number of OFDM symbols of the additional DMRS is 1 or more, and the setting ( ⁇ ) of the PDSCH subcarrier interval
  • the conditions and time values within the correspondence are only examples.
  • the number of OFDM symbols of additional DMRS as a condition may be an arbitrary value
  • the number of rows indicating the number of OFDM symbols of additional DMRS as a condition may be 3 or more.
  • Whether the above option 6-1 or 6-2 is applied may be specified in advance, may be determined by a specific rule, or may be set using RRC signaling and may be determined based on UE capability information.
  • PDSCH processing procedure time / PDSCH decoding time time can be determined/judged appropriately.
  • At least one of options 7-1 and 7-2 below may be applied to the bit field of the information on the reference signal included in the MAC CE/DCI (format).
  • a UE may not expect to receive a DCI/MAC CE containing information about reference signals whose bit-fields are to be changed in width.
  • the UE may determine/determine the bit width of the information on the reference signal based on the specific bit width configuration.
  • the specific bit width setting may be, for example, a reference signal setting that requires the longest (or maximum) bit width.
  • the UE should set the bit width equal to the longest bit width. It may be assumed that the MSB (or LSB) of the field is padded with a fixed value (eg, 0 (or 1)).
  • FIG. 14 is a diagram showing an example bit width of the MAC CE/DCI field according to option 7-1 of the seventh embodiment.
  • multiple reference signal configurations DMRS configurations X and Y
  • DMRS configurations X and Y are configured for the UE.
  • the bit field of the information on the reference signal related to DMRS configuration X (the antenna port field for DMRS configuration X in the example of FIG. 14) is the information on the reference signal related to DMRS configuration Y. Shorter than bitfield.
  • the bit width of the information contained in MAC CE/DCI is calculated based on the bit width of the bit field of the information related to the reference signal associated with DMRS setting Y, which requires a longer (longest) bit field. be done.
  • bit width of the information about the reference signal related to the DMRS setting X is padded with a fixed value (0) so that it is equal to the bit width of the information about the reference signal related to the DMRS setting Y.
  • ⁇ Option 7-2 ⁇ For the UE, it may be configured whether the bit width of the bit field of the information on the reference signal included in the MAC CE/DCI (format) can be changed.
  • This setting may be performed using higher layer signaling (RRC signaling/MAC CE)/physical layer signaling (DCI).
  • RRC signaling/MAC CE higher layer signaling
  • DCI physical layer signaling
  • the UE uses the following options 7-2-1 to 7-2- 3, may operate according to at least one of
  • the UE may not expect to receive MAC CE/DCI containing information about the bit width modified reference signal.
  • the UE may receive the MAC CE/DCI containing information about the reference signal whose bit width is changed.
  • the UE does not have to apply the information on the reference signal included in the MAC CE/DCI.
  • the UE may receive the MAC CE/DCI containing information about the reference signal whose bit width is changed.
  • the UE may apply the information on the reference signal included in the MAC CE/DCI in specific cases.
  • the information about the reference signal may be shorter than the already set bit width required for setting the reference signal. Also, in the specific case, for example, the information about the reference signal may be equal to the bit width required for setting the reference signal that has already been set.
  • the UE does not have to assume reception of MAC CE/DCI containing information on reference signals that are changed to a bit width longer than the bit width required for the already set reference signal settings.
  • the UE When the UE receives a DCI/MAC CE associated with a reference signal configuration corresponding to a bit width that is short compared to the longest bit width, the UE shall adjust the bit field so that it equals the same bit width as the longest bit width. It may be assumed that the MSB (or LSB) is padded with a fixed value (eg, 0 (or 1)).
  • the UE When receiving MAC CE/DCI including information on reference signals that are changed to a bit width longer than the bit width required for the already set reference signal configuration, the UE does not apply all of the information on reference signals. good too.
  • the UE When receiving MAC CE/DCI containing information on reference signals that are changed to a bit width longer than the bit width required for the already set reference signal settings, the UE applies only part of the information on reference signals.
  • Whether any of the above options 7-2-1 to 7-2-3 is applied may be specified in advance in the specification, may be determined by a specific rule, or may be set using RRC signaling. or determined based on UE capability information.
  • the seventh embodiment even when the mapping of reference signals is dynamically set/instructed, it is possible to appropriately determine bit fields of information on reference signals.
  • the eighth embodiment describes restrictions on additional reference signals.
  • At least one of options 8-1 and 8-2 below may be applied to the number of additional reference signal symbols.
  • the additional reference signal and the additional DMRS may be read interchangeably.
  • the number of additional reference signal symbols and the number of additional DMRS OFDM symbols may be read interchangeably.
  • the number of symbols of additional reference signals may be limited/determined based on the symbol position of the first (first) reference signal.
  • the first (initial) reference signal may be a reference signal of a specific mapping type (eg, mapping type A).
  • the number of symbols of additional reference signals may be limited/determined based on the symbol positions of frontloaded reference signals.
  • the above restrictions are higher layer parameters indicating the position of the first (first) reference signal (eg, dmrs-TypeA-Position), the mapping type of the UL/DL channel, and the UL/DL channel may mean that the number of additional reference signal symbols is limited based on at least one of the duration of .
  • the above limitation means that the number of additional reference signal symbols is limited based on a higher layer parameter (for example, maxLength) indicating the maximum number of frontloaded reference signals. good.
  • a higher layer parameter for example, maxLength
  • the UE may assume that the information on the reference signals does not include any configuration/indication that exceeds the limit on the number of symbols for additional reference signals.
  • the UE operates based on at least one of the following options 8-2-1 and 8-2-2 good too.
  • the UE may apply the information regarding the reference signals regardless of the symbol number limit of the additional reference signals.
  • the UE may not apply information about reference signals to direct reference signal mapping beyond the limit of the number of symbols for additional reference signals.
  • the UE does not have to apply all the information about the received reference signals.
  • the UE may not apply only part of the information about the received reference signals.
  • Whether one of the options 8-2-1 and 8-2-2 is applied may be specified in advance, may be determined by a specific rule, or may be set using RRC signaling. or determined based on UE capability information.
  • ⁇ Ninth Embodiment> At least one of the embodiments described above may only be applied to UEs that have reported or support a particular UE capability.
  • the specific UE capabilities may indicate at least one of the following: - Whether to support specific operations/information for each embodiment. - Whether or not to support the application of each option/combination of options in each embodiment.
  • the above UE capability may be reported by whether or not the UE can handle it.
  • the UE capabilities may be reported for all frequencies, per frequency, or for frequency ranges (eg, Frequency Range 1 (FR1), Frequency Range 2 (FR2), FR2-1, FR2- 2) may be reported for each, may be reported for each cell, or may be reported for each subcarrier spacing (SCS).
  • FR1 Frequency Range 1
  • FR2 Frequency Range 2
  • SCS subcarrier spacing
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • the above embodiments may be applied if the UE is configured with specific information related to the above embodiments by higher layer signaling.
  • the specific information may be reduced CSI feedback/information indicating enabling reduced CSI feedback, any RRC parameters for a specific release (eg, Rel.18), etc. .
  • the UE can implement the above functions while maintaining compatibility with existing specifications.
  • wireless communication system A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below.
  • communication is performed using any one of the radio communication methods according to the above embodiments of the present disclosure or a combination thereof.
  • FIG. 15 is a diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment.
  • the wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by the Third Generation Partnership Project (3GPP). .
  • LTE Long Term Evolution
  • 5G NR 5th generation mobile communication system New Radio
  • 3GPP Third Generation Partnership Project
  • the wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
  • RATs Radio Access Technologies
  • MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)), etc.
  • RATs Radio Access Technologies
  • MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)), etc.
  • LTE Evolved Universal Terrestrial Radio Access
  • EN-DC E-UTRA-NR Dual Connectivity
  • NE-DC NR-E -UTRA Dual Connectivity
  • the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN).
  • the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.
  • the wireless communication system 1 has dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC) in which both MN and SN are NR base stations (gNB) )) may be supported.
  • dual connectivity NR-NR Dual Connectivity (NN-DC) in which both MN and SN are NR base stations (gNB)
  • gNB NR base stations
  • a wireless communication system 1 includes a base station 11 forming a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) arranged in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. You may prepare.
  • a user terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and user terminals 20 are not limited to the embodiment shown in the figure.
  • the base stations 11 and 12 are collectively referred to as the base station 10 when not distinguished.
  • the user terminal 20 may connect to at least one of the multiple base stations 10 .
  • the user terminal 20 may utilize at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).
  • CA carrier aggregation
  • CC component carriers
  • DC dual connectivity
  • Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)).
  • Macrocell C1 may be included in FR1, and small cell C2 may be included in FR2.
  • FR1 may be a frequency band below 6 GHz (sub-6 GHz)
  • FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.
  • the user terminal 20 may communicate using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • a plurality of base stations 10 may be connected by wire (for example, an optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
  • wire for example, an optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.
  • NR communication for example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) is an IAB Also called a node.
  • IAB Integrated Access Backhaul
  • relay station relay station
  • the base station 10 may be connected to the core network 30 directly or via another base station 10 .
  • the core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), and the like.
  • EPC Evolved Packet Core
  • 5GCN 5G Core Network
  • NGC Next Generation Core
  • the user terminal 20 may be a terminal compatible with at least one of communication schemes such as LTE, LTE-A, and 5G.
  • a radio access scheme based on orthogonal frequency division multiplexing may be used.
  • OFDM orthogonal frequency division multiplexing
  • CP-OFDM Cyclic Prefix OFDM
  • DFT-s-OFDM Discrete Fourier Transform Spread OFDM
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • a radio access method may be called a waveform.
  • other radio access schemes for example, other single-carrier transmission schemes and other multi-carrier transmission schemes
  • the UL and DL radio access schemes may be used as the UL and DL radio access schemes.
  • a downlink shared channel Physical Downlink Shared Channel (PDSCH)
  • PDSCH Physical Downlink Shared Channel
  • PBCH Physical Broadcast Channel
  • PDCCH Physical Downlink Control Channel
  • an uplink shared channel (PUSCH) shared by each user terminal 20 an uplink control channel (PUCCH), a random access channel (Physical Random Access Channel (PRACH)) or the like may be used.
  • PUSCH uplink shared channel
  • PUCCH uplink control channel
  • PRACH Physical Random Access Channel
  • User data, upper layer control information, System Information Block (SIB), etc. are transmitted by the PDSCH.
  • User data, higher layer control information, and the like may be transmitted by PUSCH.
  • a Master Information Block (MIB) may be transmitted by the PBCH.
  • Lower layer control information may be transmitted by the PDCCH.
  • the lower layer control information may include, for example, downlink control information (DCI) including scheduling information for at least one of PDSCH and PUSCH.
  • DCI downlink control information
  • the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc.
  • the DCI that schedules PUSCH may be called UL grant, UL DCI, etc.
  • PDSCH may be replaced with DL data
  • PUSCH may be replaced with UL data.
  • a control resource set (CControl Resource SET (CORESET)) and a search space (search space) may be used for PDCCH detection.
  • CORESET corresponds to a resource searching for DCI.
  • the search space corresponds to the search area and search method of PDCCH candidates.
  • a CORESET may be associated with one or more search spaces. The UE may monitor CORESETs associated with certain search spaces based on the search space settings.
  • One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
  • One or more search spaces may be referred to as a search space set. Note that “search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. in the present disclosure may be read interchangeably.
  • PUCCH channel state information
  • acknowledgment information for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.
  • SR scheduling request
  • a random access preamble for connection establishment with a cell may be transmitted by the PRACH.
  • downlink, uplink, etc. may be expressed without adding "link”.
  • various channels may be expressed without adding "Physical" to the head.
  • synchronization signals SS
  • downlink reference signals DL-RS
  • the DL-RS includes a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DeModulation Reference Signal (DMRS)), Positioning Reference Signal (PRS)), Phase Tracking Reference Signal (PTRS)), etc.
  • CRS cell-specific reference signal
  • CSI-RS channel state information reference signal
  • DMRS Demodulation reference signal
  • PRS Positioning Reference Signal
  • PTRS Phase Tracking Reference Signal
  • the synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • a signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called SS/PBCH block, SS Block (SSB), and so on.
  • SS, SSB, etc. may also be referred to as reference signals.
  • DMRS may also be called a user terminal-specific reference signal (UE-specific reference signal).
  • FIG. 16 is a diagram illustrating an example of the configuration of a base station according to one embodiment.
  • the base station 10 comprises a control section 110 , a transmission/reception section 120 , a transmission/reception antenna 130 and a transmission line interface 140 .
  • One or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140 may be provided.
  • this example mainly shows the functional blocks of the features of the present embodiment, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
  • the control unit 110 controls the base station 10 as a whole.
  • the control unit 110 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.
  • the control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping), and the like.
  • the control unit 110 may control transmission/reception, measurement, etc. using the transmission/reception unit 120 , the transmission/reception antenna 130 and the transmission line interface 140 .
  • the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, etc., and transfer them to the transmission/reception unit 120 .
  • the control unit 110 may perform call processing (setup, release, etc.) of communication channels, state management of the base station 10, management of radio resources, and the like.
  • the transmitting/receiving section 120 may include a baseband section 121 , a radio frequency (RF) section 122 and a measuring section 123 .
  • the baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212 .
  • the transmitting/receiving unit 120 is configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field according to the present disclosure. be able to.
  • the transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured from a transmission unit and a reception unit.
  • the transmission section may be composed of the transmission processing section 1211 and the RF section 122 .
  • the receiving section may be composed of a reception processing section 1212 , an RF section 122 and a measurement section 123 .
  • the transmitting/receiving antenna 130 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
  • the transmitting/receiving unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmitting/receiving unit 120 may receive the above-described uplink channel, uplink reference signal, and the like.
  • the transmitting/receiving unit 120 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
  • digital beamforming eg, precoding
  • analog beamforming eg, phase rotation
  • the transmission/reception unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • HARQ retransmission control for example, HARQ retransmission control
  • the transmission/reception unit 120 (transmission processing unit 1211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (DFT) on the bit string to be transmitted. Processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, transmission processing such as digital-to-analog conversion may be performed, and the baseband signal may be output.
  • channel coding which may include error correction coding
  • modulation modulation
  • mapping mapping
  • filtering filtering
  • DFT discrete Fourier transform
  • DFT discrete Fourier transform
  • the transmitting/receiving unit 120 may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 130. .
  • the transmitting/receiving unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 130.
  • the transmission/reception unit 120 (reception processing unit 1212) performs analog-to-digital conversion, Fast Fourier transform (FFT) processing, and Inverse Discrete Fourier transform (IDFT) processing on the acquired baseband signal. )) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing. User data and the like may be acquired.
  • FFT Fast Fourier transform
  • IDFT Inverse Discrete Fourier transform
  • the transmitting/receiving unit 120 may measure the received signal.
  • the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, etc. based on the received signal.
  • the measurement unit 123 measures received power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)) , signal strength (for example, Received Signal Strength Indicator (RSSI)), channel information (for example, CSI), and the like may be measured.
  • RSRP Reference Signal Received Power
  • RSSQ Reference Signal Received Quality
  • SINR Signal to Noise Ratio
  • RSSI Received Signal Strength Indicator
  • channel information for example, CSI
  • the transmission path interface 140 transmits and receives signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, etc., and user data (user plane data) for the user terminal 20, control plane data, and the like. Data and the like may be obtained, transmitted, and the like.
  • the transmitting unit and receiving unit of the base station 10 in the present disclosure may be configured by at least one of the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission line interface 140.
  • the transmitting/receiving unit 120 may transmit one or more reference signal settings.
  • the control unit 110 performs at least transmission and reception of the reference signal to which at least part of at least one of the reference signal configurations is applied, based on at least one of information about the reference signal and a specific condition.
  • One may be controlled (first embodiment).
  • the transmitting/receiving unit 120 transmits one or more reference signal settings using (Radio Resource Control (RRC)) signaling, and transmits information about the reference signals as downlink control information (DCI) and Medium Access Control (MAC) control elements ( Control Element (CE)) may be used for transmission.
  • RRC Radio Resource Control
  • DCI downlink control information
  • MAC Medium Access Control
  • CE Control Element
  • the control unit 110 may determine the mapping of the reference signals using the reference signal configuration and the information on the reference signals (second and third embodiments).
  • the transmitting/receiving unit 120 may transmit one or more reference signal settings and information on reference signals.
  • the control unit 110 may determine the application period of the information on the reference signals, and determine the mapping of the reference signals using the reference signal configuration and the information on the reference signals (fourth embodiment).
  • the transmitting/receiving unit 120 may use at least one of downlink control information (DCI) and medium access control (MAC) control element (CE) to transmit information about the reference signal.
  • DCI downlink control information
  • MAC medium access control
  • CE control element
  • FIG. 17 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment.
  • the user terminal 20 includes a control section 210 , a transmission/reception section 220 and a transmission/reception antenna 230 .
  • One or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.
  • this example mainly shows the functional blocks of the features of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
  • the control unit 210 controls the user terminal 20 as a whole.
  • the control unit 210 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.
  • the control unit 210 may control signal generation, mapping, and the like.
  • the control unit 210 may control transmission/reception, measurement, etc. using the transmission/reception unit 220 and the transmission/reception antenna 230 .
  • the control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transmission/reception unit 220 .
  • the transmitting/receiving section 220 may include a baseband section 221 , an RF section 222 and a measurement section 223 .
  • the baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212 .
  • the transmitting/receiving unit 220 can be configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field according to the present disclosure.
  • the transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured from a transmission unit and a reception unit.
  • the transmission section may be composed of a transmission processing section 2211 and an RF section 222 .
  • the receiving section may include a reception processing section 2212 , an RF section 222 and a measurement section 223 .
  • the transmitting/receiving antenna 230 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
  • the transmitting/receiving unit 220 may receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmitting/receiving unit 220 may transmit the above-described uplink channel, uplink reference signal, and the like.
  • the transmitter/receiver 220 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
  • digital beamforming eg, precoding
  • analog beamforming eg, phase rotation
  • the transmitting/receiving unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (eg, RLC retransmission control), MAC layer processing (eg, , HARQ retransmission control) and the like may be performed to generate a bit string to be transmitted.
  • RLC layer processing eg, RLC retransmission control
  • MAC layer processing eg, HARQ retransmission control
  • the transmission/reception unit 220 (transmission processing unit 2211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), and IFFT processing on a bit string to be transmitted. , precoding, digital-analog conversion, and other transmission processing may be performed, and the baseband signal may be output.
  • Whether or not to apply DFT processing may be based on transform precoding settings. Transmitting/receiving unit 220 (transmission processing unit 2211), for a certain channel (for example, PUSCH), if transform precoding is enabled, the above to transmit the channel using the DFT-s-OFDM waveform
  • the DFT process may be performed as the transmission process, or otherwise the DFT process may not be performed as the transmission process.
  • the transmitting/receiving unit 220 may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 230. .
  • the transmitting/receiving section 220 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 230.
  • the transmission/reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (error correction) on the acquired baseband signal. decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
  • the transmitting/receiving section 220 may measure the received signal.
  • the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal.
  • the measuring unit 223 may measure received power (eg, RSRP), received quality (eg, RSRQ, SINR, SNR), signal strength (eg, RSSI), channel information (eg, CSI), and the like.
  • the measurement result may be output to control section 210 .
  • the transmitter and receiver of the user terminal 20 in the present disclosure may be configured by at least one of the transmitter/receiver 220 and the transmitter/receiver antenna 230 .
  • the transceiver 220 may receive one or more reference signal configurations.
  • the control unit 210 may control application of at least one of the reference signal configurations based on at least one of information about reference signals and a specific condition (first embodiment).
  • the reference signal setting may include at least one of demodulation reference signal setting and phase tracking reference signal setting (first embodiment).
  • the control unit 210 may select/determine one reference signal setting from a plurality of the reference signal settings based on the information about the reference signal and the specific condition (first embodiment).
  • the specific conditions include application of reference signal bundling, whether or not transmission of a channel spanning a plurality of slots is performed, overlap with other reference signals different from the reference signal, modulation order, number of layers, the Number of reference signal ports, format of downlink control information for scheduling physical downlink shared channels or physical uplink shared channels, whether or not the reference signal is used for a specific channel, cyclic redundancy check of the downlink control information Radio network temporary identifier used for scrambling, configured grant setting, whether the downlink control information includes information about the reference signal, the state of the terminal corresponding to the learning state, and the terminal speed (first embodiment).
  • the transmitting/receiving unit 220 receives one or more reference signal settings using (Radio Resource Control (RRC)) signaling, and transmits information on the reference signals as downlink control information (DCI) and Medium Access Control (MAC) control elements ( Control Element (CE)) may be used for reception.
  • RRC Radio Resource Control
  • DCI downlink control information
  • MAC Medium Access Control
  • CE Control Element
  • the control unit 210 may control the mapping of the reference signals based on the reference signal configuration and information on the reference signals (second and third embodiments).
  • the control unit 210 may determine at least one of slots and symbols to which the reference signal is not mapped based on the information on the reference signal (second embodiment).
  • the control unit 210 may determine subcarriers to which the reference signal is not mapped based on the information on the reference signal (second embodiment).
  • the control unit 210 may determine an orthogonal cover code sequence to be applied to the reference signal based on the information on the reference signal (second embodiment).
  • the transmitting/receiving unit 220 may receive one or more reference signal settings and information about the reference signals.
  • the control unit 210 may determine the application period of the information on the reference signals, and determine the mapping of the reference signals based on the reference signal configuration and the information on the reference signals (fourth embodiment).
  • control unit 210 may apply the information on the reference signal to all of the channels (fourth embodiment ).
  • control unit 210 may apply information about the reference signal in the first transmission opportunity of the channel (first 4).
  • the control unit 210 controls the first period after the reception of the information on the reference signal and the first time after the reception of the Hybrid Automatic Repeat ReQuest ACKnowledgement (HARQ-ACK) for the downlink control information including the information on the reference signal. At least one of the start and end of application of the information on the reference signal may be determined after the period of 2 has elapsed (fourth embodiment).
  • HARQ-ACK Hybrid Automatic Repeat ReQuest ACKnowledgement
  • the transmitting/receiving unit 220 may use at least one of downlink control information (DCI) and medium access control (MAC) control element (CE) to receive information about the reference signal.
  • DCI downlink control information
  • MAC medium access control
  • CE control element
  • the control unit 210 may determine the decoding time of the physical downlink shared channel based on information on additional reference signals included in the DCI (sixth embodiment).
  • control unit 210 may It may be determined that the bit width of the information is a fixed value, or it may be assumed that the bit width is padded to the fixed value (seventh embodiment).
  • the control unit 210 may determine whether or not the information on the reference signals includes an instruction to exceed the limit on the number of additional reference signal symbols (eighth embodiment).
  • each functional block may be implemented using one device physically or logically coupled, or directly or indirectly using two or more physically or logically separated devices (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
  • a functional block may be implemented by combining software in the one device or the plurality of devices.
  • function includes judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deem , broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
  • a functional block (component) that performs transmission may be called a transmitting unit, a transmitter, or the like. In either case, as described above, the implementation method is not particularly limited.
  • a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 18 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to one embodiment.
  • the base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. .
  • the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.
  • processor 1001 may be implemented by one or more chips.
  • predetermined software program
  • the processor 1001 performs calculations, communication via the communication device 1004 and at least one of reading and writing data in the memory 1002 and the storage 1003 .
  • the processor 1001 operates an operating system and controls the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like.
  • CPU central processing unit
  • control unit 110 210
  • transmission/reception unit 120 220
  • FIG. 10 FIG. 10
  • the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them.
  • programs program codes
  • software modules software modules
  • data etc.
  • the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be similarly implemented.
  • the memory 1002 is a computer-readable recording medium, such as Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or at least any other suitable storage medium. may be configured by one.
  • the memory 1002 may also be called a register, cache, main memory (main storage device), or the like.
  • the memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also be called an auxiliary storage device.
  • a computer-readable recording medium for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also
  • 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 called a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD), for example. may be configured to include
  • the transmitting/receiving unit 120 (220), the transmitting/receiving antenna 130 (230), and the like described above may be realized by the communication device 1004.
  • the transmitter/receiver 120 (220) may be physically or logically separated into a transmitter 120a (220a) and a receiver 120b (220b).
  • the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
  • Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses between devices.
  • the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured including hardware, and a part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • FPGA field programmable gate array
  • a signal may also be a message.
  • a reference signal may be abbreviated as RS, and may also be called a pilot, a pilot signal, etc., depending on the applicable standard.
  • a component carrier may also be called a cell, a frequency carrier, a carrier frequency, or the like.
  • a radio frame may consist of one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) that make up a radio frame may be called a subframe.
  • a subframe may consist of one or more slots in the time domain.
  • a subframe may be a fixed time length (eg, 1 ms) independent of numerology.
  • a numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
  • Numerology for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration , a particular filtering process performed by the transceiver in the frequency domain, a particular windowing process performed by the transceiver in the time domain, and/or the like.
  • a slot may consist of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • a slot may also be a unit of time based on numerology.
  • a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
  • a PDSCH (or PUSCH) transmitted in time units larger than a minislot may be referred to as PDSCH (PUSCH) Mapping Type 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. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read interchangeably.
  • one subframe may be called a TTI
  • a plurality of consecutive subframes may be called a TTI
  • one slot or one minislot may be called a TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum scheduling time unit in wireless communication.
  • a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis.
  • radio resources frequency bandwidth, transmission power, etc. that can be used by each user terminal
  • a TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum scheduling time unit. Also, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like.
  • a TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
  • the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
  • the short TTI e.g., shortened TTI, etc.
  • a TTI having the above TTI length may be read instead.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain.
  • the number of subcarriers included in the RB may be the same regardless of the neumerology, eg twelve.
  • the number of subcarriers included in an RB may be determined based on neumerology.
  • an RB may contain one or more symbols in the time domain and may be 1 slot, 1 minislot, 1 subframe or 1 TTI long.
  • One TTI, one subframe, etc. may each be configured with one or more resource blocks.
  • One or more RBs are Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB Also called a pair.
  • PRB Physical Resource Block
  • SCG Sub-Carrier Group
  • REG Resource Element Group
  • PRB pair RB Also called a pair.
  • a resource block may be composed of one or more resource elements (Resource Element (RE)).
  • RE resource elements
  • 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • a Bandwidth Part (which may also be called a bandwidth part) represents a subset of contiguous common resource blocks (RBs) for a numerology on a carrier.
  • the common RB may be identified by an RB index based on the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
  • BWP for UL
  • BWP for DL DL BWP
  • One or multiple 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, symbols, etc. described above are merely examples.
  • the number of subframes contained in a radio frame, the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc. can be varied.
  • the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information. may be represented. For example, radio resources may be indicated by a predetermined index.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of
  • information, signals, etc. can be output from a higher layer to a lower layer and/or from a lower layer to a higher layer.
  • Information, signals, etc. may be input and output through multiple network nodes.
  • Input/output information, signals, etc. may be stored in a specific location (for example, memory), or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated or appended. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to other devices.
  • Uplink Control Information (UCI) Uplink Control Information
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • SIB System Information Block
  • MAC Medium Access Control
  • the physical layer signaling may also be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like.
  • RRC signaling may also be called an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.
  • MAC signaling may be notified using, for example, a MAC Control Element (CE).
  • CE MAC Control Element
  • notification of predetermined information is not limited to explicit notification, but implicit notification (for example, by not notifying the predetermined information or by providing another information by notice of
  • the determination may be made by a value (0 or 1) represented by 1 bit, or by a boolean value represented by true or false. , may be performed by numerical comparison (eg, comparison with a predetermined value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • the software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) , a server, or other remote source, these wired and/or wireless technologies are included within the definition of transmission media.
  • a “network” may refer to devices (eg, base stations) included in a network.
  • precoding "precoding weight”
  • QCL Quality of Co-Location
  • TCI state Transmission Configuration Indication state
  • spatialal patial relation
  • spatialal domain filter "transmission power”
  • phase rotation "antenna port
  • antenna port group "layer”
  • number of layers Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, “panel” are interchangeable. can be used as intended.
  • base station BS
  • radio base station fixed station
  • NodeB NodeB
  • eNB eNodeB
  • gNB gNodeB
  • Access point "Transmission Point (TP)”, “Reception Point (RP)”, “Transmission/Reception Point (TRP)”, “Panel”
  • a base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.
  • a base station can accommodate one or more (eg, three) cells.
  • the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area corresponding to a base station subsystem (e.g., a small indoor base station (Remote Radio)). Head (RRH))) may also provide communication services.
  • a base station subsystem e.g., a small indoor base station (Remote Radio)). Head (RRH)
  • RRH Head
  • MS Mobile Station
  • UE User Equipment
  • Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , a handset, a user agent, a mobile client, a client, or some other suitable term.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like. At least one of the base station and the mobile station may be a device mounted on a moving object, the mobile itself, or the like.
  • the moving body refers to a movable object, the speed of movement is arbitrary, and it naturally includes cases where the moving body is stationary.
  • Examples of such moving bodies include vehicles, transportation vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, carts, rickshaws, and ships (ships and other watercraft). , airplanes, rockets, satellites, drones, multi-copters, quad-copters, balloons and objects mounted on them.
  • the mobile body may be a mobile body that autonomously travels based on an operation command.
  • the mobile object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
  • a vehicle e.g., car, airplane, etc.
  • an unmanned mobile object e.g., drone, self-driving car, etc.
  • a robot manned or unmanned .
  • at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
  • at least one of the base station and mobile station may be an Internet of Things (IoT) device such as a sensor.
  • IoT Internet of Things
  • FIG. 19 is a diagram showing an example of a vehicle according to one embodiment.
  • the vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (current sensor 50, revolution sensor 51, air pressure sensor 52, vehicle speed sensor 53, acceleration sensor 54, accelerator pedal sensor 55, brake pedal sensor 56, shift lever sensor 57, and object detection sensor 58), information service unit 59 and communication module 60.
  • various sensors current sensor 50, revolution sensor 51, air pressure sensor 52, vehicle speed sensor 53, acceleration sensor 54, accelerator pedal sensor 55, brake pedal sensor 56, shift lever sensor 57, and object detection sensor 58
  • information service unit 59 and communication module 60.
  • the driving unit 41 is composed of, for example, at least one of an engine, a motor, and a hybrid of an engine and a motor.
  • the steering unit 42 includes at least a steering wheel (also referred to as a steering wheel), and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.
  • the electronic control unit 49 is composed of a microprocessor 61 , a memory (ROM, RAM) 62 , and a communication port (eg, input/output (IO) port) 63 . Signals from various sensors 50 to 58 provided in the vehicle are input to the electronic control unit 49 .
  • the electronic control unit 49 may be called an Electronic Control Unit (ECU).
  • ECU Electronic Control Unit
  • the signals from the various sensors 50 to 58 include a current signal from the current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46/rear wheels 47 obtained by the rotation speed sensor 51, and an air pressure sensor 52.
  • air pressure signal of front wheels 46/rear wheels 47 vehicle speed signal obtained by vehicle speed sensor 53, acceleration signal obtained by acceleration sensor 54, depression amount signal of accelerator pedal 43 obtained by accelerator pedal sensor 55, brake pedal sensor
  • the information service unit 59 includes various devices such as car navigation systems, audio systems, speakers, displays, televisions, and radios for providing (outputting) various information such as driving information, traffic information, and entertainment information, and these devices. and one or more ECUs that control The information service unit 59 provides various information/services (for example, multimedia information/multimedia services) to the occupants of the vehicle 40 using information acquired from an external device via the communication module 60 or the like.
  • various information/services for example, multimedia information/multimedia services
  • the information service unit 59 may include an input device (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) that receives input from the outside, and an output device that outputs to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).
  • an input device e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.
  • an output device e.g., display, speaker, LED lamp, touch panel, etc.
  • the driving support system unit 64 includes a millimeter wave radar, Light Detection and Ranging (LiDAR), a camera, a positioning locator (e.g., Global Navigation Satellite System (GNSS), etc.), map information (e.g., High Definition (HD)) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., inertial measurement units (IMU), inertial navigation systems (INS), etc.), artificial intelligence ( Artificial intelligence (AI) chips, AI processors, and other devices that provide functions to prevent accidents and reduce the driver's driving load, and one or more devices that control these devices ECU.
  • the driving support system unit 64 transmits and receives various information via the communication module 60, and realizes a driving support function or an automatic driving function.
  • the communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63 .
  • the communication module 60 communicates with the vehicle 40 through a communication port 63 such as a driving unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, Data (information) is transmitted and received between the axle 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58.
  • the communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from an external device via wireless communication.
  • Communication module 60 may be internal or external to electronic control 49 .
  • the external device may be, for example, the above-described base station 10, user terminal 20, or the like.
  • the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (and may function as at least one of the base station 10 and the user terminal 20).
  • the communication module 60 receives signals from the various sensors 50 to 58 described above input to the electronic control unit 49, information obtained based on the signals, and input from the outside (user) obtained via the information service unit 59. may be transmitted to the external device via wireless communication.
  • the electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be called an input unit that receives input.
  • the PUSCH transmitted by communication module 60 may include information based on the above inputs.
  • the communication module 60 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 59 provided in the vehicle.
  • the information service unit 59 is an output unit that outputs information (for example, outputs information to devices such as displays and speakers based on the PDSCH received by the communication module 60 (or data/information decoded from the PDSCH)). may be called
  • the communication module 60 stores various information received from an external device in a memory 62 that can be used by the microprocessor 61 . Based on the information stored in the memory 62, the microprocessor 61 controls the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, and the left and right rear wheels provided in the vehicle 40. 47, axle 48, and various sensors 50-58 may be controlled.
  • the base station in the present disclosure may be read as a user terminal.
  • communication between a base station and a user terminal is replaced with communication between multiple user terminals (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.)
  • the user terminal 20 may have the functions of the base station 10 described above.
  • words such as "uplink” and “downlink” may be replaced with words corresponding to communication between terminals (for example, "sidelink”).
  • uplink channels, downlink channels, etc. may be read as sidelink channels.
  • user terminals in the present disclosure may be read as base stations.
  • the base station 10 may have the functions of the user terminal 20 described above.
  • operations that are assumed to be performed by the base station may be performed by its upper node in some cases.
  • various operations performed for communication with a terminal may involve the base station, one or more network nodes other than the base station (e.g., Clearly, this can be done by a Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. (but not limited to these) or a combination thereof.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching along with execution. Also, the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in the present disclosure may be rearranged as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.
  • 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
  • 6G 6th generation mobile communication system
  • xG x is, for example, an integer or a decimal number
  • Future Radio Access FAA
  • RAT New-Radio Access Technology
  • NR New Radio
  • NX New radio access
  • FX Future generation radio access
  • GSM registered trademark
  • CDMA2000 Code Division Multiple Access
  • UMB Ultra Mobile Broadband
  • IEEE 802 .11 Wi-Fi®
  • IEEE 802.16 WiMAX®
  • IEEE 802.20 Ultra-WideBand (UWB), Bluetooth®, or any other suitable wireless communication method. It may be applied to a system to be used, a next-generation system extended, modified, created or defined based on these.
  • any reference to elements using the "first,” “second,” etc. designations 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, references to first and second elements do not imply that only two elements may be employed or that the first element must precede the second element in any way.
  • determining includes judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry ( For example, looking up in a table, database, or another data structure), ascertaining, etc. may be considered to be “determining.”
  • determining (deciding) includes receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access ( accessing (e.g., accessing data in memory), etc.
  • determining is considered to be “determining” resolving, selecting, choosing, establishing, comparing, etc. good too. That is, “determining (determining)” may be regarded as “determining (determining)” some action.
  • connection refers to any connection or coupling, direct or indirect, between two or more elements. and can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other. Couplings or connections between elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
  • radio frequency domain when two elements are connected, using one or more wires, cables, printed electrical connections, etc., and as some non-limiting and non-exhaustive examples, radio frequency domain, microwave They can be considered to be “connected” or “coupled” together using the domain, electromagnetic energy having wavelengths in the optical (both visible and invisible) domain, and the like.
  • a and B are different may mean “A and B are different from each other.”
  • the term may also mean that "A and B are different from C”.
  • Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner as “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 divulgation concerne un terminal qui comprend : une unité de réception qui reçoit des informations concernant un signal de référence à l'aide d'au moins un élément parmi des informations de commande de liaison descendante (DCI) et un élément de commande (CE) de contrôle d'accès au support (MAC) ; et une unité de commande qui, lorsqu'une ressource du signal de référence sur la base des informations concernant le signal de référence et une ressource d'un autre signal de référence différent du signal de référence sont configurées pour se chevaucher, commande la réception du signal de référence et de l'autre signal de référence. Selon un aspect de la présente divulgation, l'utilisation appropriée de ressources RS peut être obtenue.
PCT/JP2021/046612 2021-12-16 2021-12-16 Terminal, procédé de communication sans fil et station de base WO2023112277A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202180105415.3A CN118575543A (zh) 2021-12-16 2021-12-16 终端、无线通信方法及基站
PCT/JP2021/046612 WO2023112277A1 (fr) 2021-12-16 2021-12-16 Terminal, procédé de communication sans fil et station de base

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/046612 WO2023112277A1 (fr) 2021-12-16 2021-12-16 Terminal, procédé de communication sans fil et station de base

Publications (1)

Publication Number Publication Date
WO2023112277A1 true WO2023112277A1 (fr) 2023-06-22

Family

ID=86773831

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/046612 WO2023112277A1 (fr) 2021-12-16 2021-12-16 Terminal, procédé de communication sans fil et station de base

Country Status (2)

Country Link
CN (1) CN118575543A (fr)
WO (1) WO2023112277A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019138562A1 (fr) * 2018-01-12 2019-07-18 株式会社Ｎｔｔドコモ Dispositif de radiocommunication
WO2021065010A1 (fr) * 2019-10-04 2021-04-08 株式会社Ｎｔｔドコモ Terminal et procédé de communication sans fil
WO2021199348A1 (fr) * 2020-03-31 2021-10-07 株式会社Ｎｔｔドコモ Terminal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019138562A1 (fr) * 2018-01-12 2019-07-18 株式会社Ｎｔｔドコモ Dispositif de radiocommunication
WO2021065010A1 (fr) * 2019-10-04 2021-04-08 株式会社Ｎｔｔドコモ Terminal et procédé de communication sans fil
WO2021199348A1 (fr) * 2020-03-31 2021-10-07 株式会社Ｎｔｔドコモ Terminal

Also Published As

Publication number Publication date
CN118575543A (zh) 2024-08-30

Similar Documents

Publication Publication Date Title
WO2023112277A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023112278A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023112279A1 (fr) Terminal, procédé de communication radio et station de base
WO2023112280A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2023157461A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2023063234A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023152816A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023079704A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023135801A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023152791A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023135802A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023152792A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023135800A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2023167214A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023152982A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023166717A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023157254A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023166716A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2023157253A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023157252A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023073908A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023073917A1 (fr) Terminal, procédé de communication radio et station de base
WO2023073915A1 (fr) Terminal, procédé de communication radio et station de base
WO2023166718A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2023073916A1 (fr) Terminal, procédé de communication sans fil et station de base

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21968192

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE