WO2022153379A1 - Terminal, procédé de communication sans fil et station de base - Google Patents

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

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Publication number
WO2022153379A1
WO2022153379A1 PCT/JP2021/000777 JP2021000777W WO2022153379A1 WO 2022153379 A1 WO2022153379 A1 WO 2022153379A1 JP 2021000777 W JP2021000777 W JP 2021000777W WO 2022153379 A1 WO2022153379 A1 WO 2022153379A1
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WIPO (PCT)
Prior art keywords
transmission
doppler correction
information
doppler
channel
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PCT/JP2021/000777
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English (en)
Japanese (ja)
Inventor
祐輝 松村
聡 永田
ジン ワン
ラン チン
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株式会社Ｎｔｔドコモ
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Priority to PCT/JP2021/000777 priority Critical patent/WO2022153379A1/fr
Priority to JP2022574897A priority patent/JPWO2022153379A1/ja
Publication of WO2022153379A1 publication Critical patent/WO2022153379A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/42—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • This 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).
  • a successor system to LTE for example, 5th generation mobile communication system (5G), 5G + (plus), New Radio (NR), 3GPP Rel.15 or later, etc.) is also being considered.
  • 5G 5th generation mobile communication system
  • 5G + plus
  • NR New Radio
  • 3GPP Rel.15 or later, etc. is also being considered.
  • transmission points for example, Remote Radio Head (RRH)
  • RRH Remote Radio Head
  • one of the purposes of the present disclosure is to provide a terminal, a wireless communication method, and a base station capable of appropriately controlling wireless communication in a mobile body.
  • the terminal includes a receiving unit that receives information regarding application of Doppler correction for transmission of a physical uplink shared channel (PUSCH) to one or more transmission / reception points arranged in a movement path, and the above-mentioned terminal. It has a control unit for determining the application of the Doppler correction to each of the one or more transmission / reception points based on the information.
  • PUSCH physical uplink shared channel
  • wireless communication in a mobile body can be appropriately controlled.
  • FIG. 1A and 1B are diagrams showing an example of communication between a mobile body and a transmission point (for example, RRH).
  • FIG. 2 is a diagram showing an example of a communication method with a transmission / reception point arranged in the movement path of the moving body.
  • FIG. 3 is a diagram showing an example of DL Doppler correction in HST.
  • FIG. 4 is a diagram showing an example of Doppler correction application for transmission of UL signal / channel in the first embodiment.
  • FIG. 5 is a diagram showing an example of application of Doppler correction for transmission of UL signal / channel in the second embodiment.
  • 6A and 6B are diagrams showing an example of MAC CE in the third embodiment.
  • FIG. 7 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
  • FIG. 8 is a diagram showing an example of the configuration of the base station according to the embodiment.
  • FIG. 9 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
  • FIG. 10 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
  • reception processing for example, reception, demapping, demodulation, etc.
  • transmission configuration indication state TCI state
  • Controlling at least one of decoding and transmission processing eg, at least one of transmission, mapping, precoding, modulation, and coding
  • the TCI state may represent what applies to the downlink signal / channel.
  • the equivalent of the TCI state applied to the uplink signal / channel may be expressed as a spatial relation.
  • the TCI state is information related to signal / channel pseudo collocation (Quasi-Co-Location (QCL)), and may be called spatial reception parameters, spatial relation information, or the like.
  • the TCI state may be set on the UE on a channel-by-channel or signal-by-signal basis.
  • QCL is an index showing the statistical properties of signals / channels. For example, when one signal / channel and another signal / channel have a QCL relationship, Doppler shift, Doppler spread, and average delay are performed between these different signals / channels. ), Delay spread, and spatial parameter (for example, spatial Rx parameter) can be assumed to be the same (QCL for at least one of these). You may.
  • the spatial reception parameter may correspond to the received beam of the UE (for example, the received analog beam), or the beam may be specified based on the spatial QCL.
  • the QCL (or at least one element of the QCL) in the present disclosure may be read as sQCL (spatial QCL).
  • QCL types A plurality of types (QCL types) may be specified for the QCL.
  • QCL types AD QCL types with different parameters (or parameter sets) that can be assumed to be the same may be provided, and the parameters (may be referred to as QCL parameters) are shown below:
  • QCL Type A QCL-A
  • QCL-B Doppler shift and Doppler spread
  • QCL type C QCL-C
  • QCL-D Spatial reception parameter.
  • the UE may assume that a given control resource set (Control Resource Set (CORESET)), channel or reference signal has a specific QCL (eg, QCL type D) relationship with another CORESET, channel or reference signal.
  • QCL assumption QCL assumption
  • the UE may determine at least one of the transmission beam (Tx beam) and the reception beam (Rx beam) of the signal / channel based on the TCI state of the signal / channel or the QCL assumption.
  • the TCI state may be, for example, information about the QCL of the target channel (in other words, the reference signal (Reference Signal (RS)) for the channel) and another signal (for example, another RS). ..
  • the TCI state may be set (instructed) by higher layer signaling, physical layer signaling, or a combination thereof.
  • the upper layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • MAC CE MAC Control Element
  • PDU MAC Protocol Data Unit
  • the broadcast information includes, for example, a master information block (Master Information Block (MIB)), a system information block (System Information Block (SIB)), a minimum system information (Remaining Minimum System Information (RMSI)), and other system information ( Other System Information (OSI)) may be used.
  • MIB Master Information Block
  • SIB System Information Block
  • RMSI Minimum System Information
  • OSI Other System Information
  • the physical layer signaling may be, for example, downlink control information (DCI).
  • DCI downlink control information
  • the channels for which the TCI state or spatial relationship is set are, for example, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), and an uplink shared channel (Physical Uplink Shared). It may be at least one of a Channel (PUSCH)) and an uplink control channel (Physical Uplink Control Channel (PUCCH)).
  • PDSCH Physical Downlink Shared Channel
  • PDCH Downlink Control Channel
  • PUSCH Physical Uplink Control Channel
  • PUCCH Physical Uplink Control Channel
  • the RS having a QCL relationship with the channel is, for example, a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a measurement reference signal (Sounding). It may be at least one of Reference Signal (SRS)), CSI-RS for tracking (also referred to as Tracking Reference Signal (TRS)), and reference signal for QCL detection (also referred to as QRS).
  • SSB Synchronization Signal Block
  • CSI-RS Channel State Information Reference Signal
  • Sounding Sounding
  • SRS Reference Signal
  • TRS Tracking Reference Signal
  • QRS reference signal for QCL detection
  • the SSB is a signal block including at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)), a secondary synchronization signal (Secondary Synchronization Signal (SSS)), and a broadcast channel (Physical Broadcast Channel (PBCH)).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • PBCH Physical Broadcast Channel
  • the SSB may be referred to as an SS / PBCH block.
  • the information element of the TCI state (“TCI-state IE” of RRC) set by the upper layer signaling may include one or more QCL information (“QCL-Info”).
  • the QCL information may include at least one of information related to the RS having a QCL relationship (RS-related information) and information indicating the QCL type (QCL type information).
  • RS-related information includes RS index (for example, SSB index, non-zero power CSI-RS (Non-Zero-Power (NZP) CSI-RS) resource ID (Identifier)), cell index where RS is located, and RS position.
  • Information such as the index of the Bandwidth Part (BWP) to be used may be included.
  • both QCL type A RS and QCL type D RS, or only QCL type A RS can be set for the UE.
  • TRS When TRS is set as the RS of QCL type A, it is assumed that the same TRS is periodically transmitted over a long period of time, unlike the PDCCH or PDSCH demodulation reference signal (DeModulation Reference Signal (DMRS)). Will be done.
  • DMRS DeModulation Reference Signal
  • the UE can measure the TRS and calculate the average delay, delay spread, and so on.
  • a UE in which the TRS is set as the QCL type A RS in the TCI state of the PDCCH or PDSCH DMRS has the same parameters (average delay, delay spread, etc.) of the PDCCH or PDSCH DMRS and the TRS QCL type A. Since it can be assumed that there is, the PDCCH or PDSCH DMRS type A parameters (average delay, delay spread, etc.) can be obtained from the TRS measurement result.
  • the UE can perform more accurate channel estimation by using the measurement result of the TRS.
  • a UE in which a QCL type D RS is set can determine a UE reception beam (spatial domain reception filter, UE spatial domain reception filter) using the QCL type D RS.
  • a TCI-state QCL type X RS may mean an RS that has a QCL type X relationship with a channel / signal (DMRS), and this RS is called the TCI-state QCL type X QCL source. You may.
  • DMRS channel / signal
  • HTS High speed train
  • UE terminal
  • HTS high speed train
  • Existing systems support transmitting a unidirectional beam from the RRH to communicate with the mobile (see FIG. 1A).
  • FIG. 1A shows a case where RRHs are installed along a moving path (or moving direction, traveling direction, traveling path) of a moving body, and a beam is formed from each RRH on the traveling direction side of the moving body.
  • the RRH forming a unidirectional beam may be referred to as a uni-directional RRH (uni-directional RRH).
  • the moving object undergoes a negative Doppler shift ( ⁇ f D ) from each RRH.
  • the beam may be formed on the traveling direction side of the moving body, and the traveling direction of the moving body is not limited to this. Beams may be formed in any direction regardless of.
  • a plurality of (for example, two or more) beams are transmitted from the RRH.
  • a beam is formed in both the traveling direction of the moving body and the direction opposite to the traveling direction (see FIG. 1B).
  • FIG. 1B shows a case where RRHs are installed along the movement path of the moving body and beams are formed from each RRH on both the traveling direction side and the opposite direction side of the traveling direction of the moving body.
  • the RRH that forms a beam in a plurality of directions may be called a bi-directional RRH (bi-directional RRH).
  • a positive Doppler whose power is increased from a signal in which the moving body undergoes a negative Doppler shift (Doppler offset) between two RRHs (here, RRH # 1 and RRH # 2). It switches to the shifted signal.
  • Doppler offset a negative Doppler shift between two RRHs
  • the maximum change width of the Doppler shift that needs to be corrected is the change from ⁇ f D to + f D , which is twice as large as that in the case of unidirectional RRH.
  • FIG. 2 shows an example of a case where the moving body communicates with a transmission / reception point (here, RRH # 1) arranged in the moving path.
  • a transmission / reception point here, RRH # 1
  • the transmission point may be at least one of a unidirectional RRH and a bidirectional RRH.
  • each beam transmitted from the RRH corresponds to one TCI state.
  • Each TCI state may have a TCI state period (TCI # X period).
  • the UE included in the HST receives one or more SSB / CSI-RS in one period to which the TCI state is applied.
  • Doppler shift correction Doppler Compensation
  • Pre-Doppler Compensation Pre-Doppler Compensation.
  • the TRP can reduce the influence of the Doppler shift when receiving the DL signal / channel in the UE by performing Doppler correction in advance when transmitting the DL signal / channel to the UE.
  • the Doppler shift correction for DL signal / channel transmission may be referred to as DL Doppler correction.
  • Modification A One TCI state is associated with ⁇ average delay, delay spread ⁇ and another TCI state is associated with ⁇ average delay, delay spread, Doppler shift, Doppler spread ⁇ .
  • Modification B One TCI state is associated with ⁇ mean delay, delay extension ⁇ and another TCI state is associated with ⁇ Doppler shift, Doppler spread ⁇ .
  • Modification C One TCI state is associated with ⁇ delayed spread ⁇ and another TCI state is associated with ⁇ average delay, delayed spread, Doppler shift, Doppler spread ⁇ .
  • Modification E Multiple (two) TCI states are associated with ⁇ average delay, delay spread, Doppler shift, Doppler spread ⁇ .
  • FIG. 3 is a diagram showing an example of DL Doppler correction in HST.
  • RRH # 0- # 7 are arranged along the movement path of HST.
  • RRH # 0- # 3 and RRH # 4- # 7 are connected to baseband units (BBU) # 0 and # 1, respectively.
  • BBU baseband units
  • Each RRH is a bidirectional RRH, and a beam is formed by using each transmission / reception point (Transmission / Reception Point (TRP)) in both the traveling direction of the moving path and the opposite direction of the traveling direction.
  • TRP Transmission / Reception Point
  • the TRP that forms a beam on the traveling direction side of the moving path and the TRP that forms a beam on the opposite direction to the traveling direction of the moving path are subjected to Doppler correction and then with respect to the UE in the HST.
  • TRP # 2n-1 n is an integer greater than or equal to 0
  • a negative Doppler shift -f D in FIG. 3
  • TRP # 2n n is an integer of 0 or more
  • a positive Doppler shift (+ f D in FIG. 3) occurs. Therefore, in the example shown in FIG. 3, TRP # 2n-1 performs positive Doppler correction, and TRP # 2n performs negative Doppler correction, so that the effect of Doppler shift at the time of receiving the signal / channel of the UE To reduce.
  • the channel state information transmitted from each TRP (TRP forming a beam on the traveling direction side of the moving path and TRP forming a beam on the opposite direction to the traveling direction of the moving path).
  • the reference signal (Channel State Information Reference Signal (CSI-RS)) / CSI-RS for tracking (also called Tracking Reference Signal (TRS)) should be independent (different) CSI-RS / TRS (distributed). ) CSI-RS / TRS) is being studied.
  • CSI-RS Channel State Information Reference Signal
  • TRS Tracking Reference Signal
  • the Doppler correction for UL signal / channel transmission by the UE is not sufficiently examined. If this examination is not sufficient, the reliability of communication may be impaired, and the increase in communication throughput may be suppressed.
  • each of the TRP on the traveling direction side and the TRP on the opposite direction to the traveling direction of the UE moving by HST receives.
  • the signal / channel will have different Doppler shifts.
  • the UE transmits different UL to each of the TRP on the traveling direction side and the TRP on the opposite direction to the traveling direction, or each of the TRP on the traveling direction side and the TRP on the opposite direction to the traveling direction
  • the UL transmission reception process for example, decoding and demodulation
  • the influence of the Doppler shift can be ignored without performing the Doppler correction of the UL.
  • the TRP on the traveling direction side and the TRP on the opposite direction to the traveling direction cooperate with each other to perform UL transmission in combination for any transmission mode of the UE, the Doppler shift in each TRP is different for each TRP. There is a risk of adversely affecting the combined processing in.
  • the present inventors have conceived a method of appropriately performing Doppler correction at the time of UL signal / channel transmission by the UE in the moving body.
  • DMRS Demodulation Reference Signal
  • CDM Code Division Multiplexing
  • index, ID, indicator, and resource ID may be read as each other.
  • the moving body may be any moving body as long as it moves at a predetermined speed or higher, and may be, for example, a train, a car, a motorcycle, a ship, or the like.
  • communication between the UE included in the mobile body and the transmission point may be performed directly between the UE and the transmission point, or the mobile body (for example, an antenna installed on the mobile body). It may be done between the UE and the transmit / receive point via.
  • the UE included in the mobile body may be simply referred to as a UE.
  • a / B may be read as at least one of A and B
  • a / B / C may be read as at least one of A, B and C.
  • Doppler shift, Doppler frequency shift, Doppler correction, Doppler extension (spread), Doppler shift value, Doppler correction value, Doppler frequency offset, Doppler offset, Doppler frequency offset value, Doppler offset value, etc. are interchangeably read as each other. May be done.
  • the Doppler correction used for transmitting the UL signal / channel may be simply referred to as Doppler correction or may be referred to as UL Doppler correction.
  • the information for setting / instructing whether or not to apply the Doppler correction for UL signal / channel transmission is the information for setting / instructing the application of the Doppler correction, the Doppler correction. It may be information that enables the application of. Further, the information for setting / instructing whether or not to apply the Doppler correction for the transmission of the UL signal / channel is the information for setting / instructing whether to enable or disable the application of the Doppler correction. You may. Further, the information for setting / instructing whether or not to apply the Doppler correction for the transmission of the UL signal / channel may be referred to as the information regarding the Doppler correction.
  • PUSCH will be described as an example of a UL signal / channel to which Doppler correction is applied, but each embodiment of the present disclosure also includes UL signals / channels other than PUSCH (for example, PUCCH). Applicable as appropriate.
  • each RRH may have two or more TRPs, and the signal / channel transmission / reception direction (which may be referred to as a beam formation direction) is two or more. There may be.
  • UL DMRS for UL signals / channels (eg, PUSCH / PUCCH) associated with a plurality of (eg, two) TCI states is described in Rel. It may be the QCL type specified in 17 or later, or the TCI state setting related to the plurality of TCI states related to the DL DMRS may be applied.
  • the UE may perform Doppler correction for transmission of uplink (UL) channels / signals (eg, PUSCH) in a serving cell.
  • UL uplink
  • signals eg, PUSCH
  • the UE may receive the setting (setting information) / instruction (instruction information) for performing the Doppler correction from the network (NW). Even if the setting information / instruction information is set / notified / instructed to the UE by at least one of higher layer signaling (for example, RRC signaling / MAC CE) and physical layer signaling (for example, a specific field included in DCI). good.
  • the setting information / instruction information may be information for setting / instructing whether or not to apply Doppler correction to PUSCH transmission corresponding to one or more beams / spatial relations / UL TCI / UE panel / TRP. ..
  • Embodiment 1-1 the UE may determine / determine whether to apply Doppler correction based on the implementation of the UE. In embodiment 1-1, the UE may estimate the Doppler correction value based on the reference signal (eg, DL TRS) corresponding to the beam / spatial relationship / UL TCI / UE panel / TRP.
  • the reference signal eg, DL TRS
  • the UE may decide to apply the UL Doppler correction and may determine the beam / spatial relationship / UL TCI / UE panel / TRP to which the UL Doppler correction is applied based on the implementation of the UE ( Embodiment 1-1-0).
  • the UE may receive setting information / instruction information regarding whether or not to apply Doppler correction to one or more specific beam / spatial relations / UL TCI / UE panel / TRP. The UE may then decide to apply Doppler correction to the beam / spatial relationship / UL TCI / UE panel / TRP indicated above based on the implementation of the UE (Embodiment 1-1-). 1).
  • the Doppler correction applied to the DL signal / channel specified in 16 may be applied.
  • the UE may be set to measure the Doppler shift of the DL signal / channel and report the measured Doppler shift to the NW (Embodiment 1-1-2).
  • the Doppler shift to be measured may be one value per BWP / CC / band / UE, or a beam forming direction (for example, a traveling direction, a direction opposite to the traveling direction).
  • / UE panel / TRP may be a value of 1 or more corresponding to each.
  • the UE is instructed / configured to apply Doppler correction to the UL signal / channel and is based on the Doppler shift value reported by the UE (eg, the latest reported value).
  • the value of Doppler correction for the channel may be determined.
  • the Doppler shift value measured by the UE as a single value (eg, offset ) corresponding to the beam forming direction (for example, the traveling direction, the direction opposite to the traveling direction) / UE panel / TRP.
  • the UE transmits to a certain beam forming direction (for example, traveling direction) / UE panel (for example, traveling direction panel) / TRP (for example, traveling direction side TRP). It may be determined that the Doppler correction value applied to the signal / channel is ⁇ f offset .
  • the UE moves to another beam forming direction (for example, in the direction opposite to the traveling direction) / UE panel (for example, a panel in the direction opposite to the traveling direction) / TRP (for example, TRP in the direction opposite to the traveling direction). It may be determined that the value of the Doppler correction applied to the UL signal / channel to be transmitted is + offset (Embodiment 1-1-2-1).
  • the Doppler shift value measured by the UE as a plurality of (for example, two) values (for example, foffset_1 and foffset_2 ) corresponding to each beam formation direction / UE panel / TRP.
  • the UE sends a UL signal to a beam forming direction (eg, traveling direction) / UE panel (eg, traveling direction panel) / TRP (eg, traveling direction TRP). It may be determined that the value of the Doppler correction applied to the / channel is + foffset_1 .
  • the UE refers to a certain beam forming direction (for example, a direction opposite to the traveling direction) / UE panel (for example, a panel on the side opposite to the traveling direction) / TRP (for example, TRP on the side opposite to the traveling direction). It may be determined that the value of the Doppler correction applied to the UL signal / channel to be transmitted is + foffset_2 (Embodiment 1-1-2-2).
  • Doppler shift value and Doppler correction value in each embodiment of the present disclosure are merely examples, and the values and symbols may be arbitrary.
  • Embodiment 1-2 when the UE receives information that sets / directs the application of Doppler correction for transmission of UL signals / channels, the UE uses that information to use one or more beams / spaces.
  • the value of the Doppler correction applied to the relationship / UL TCI / UE panel / TRP may be indicated.
  • the information may be information that is set / instructed in common to a plurality of serving cells used for transmission of UL signals / channels, or information that is set / instructed independently for each different serving cell. Further, the UE may use the information to receive at least one of the application / non-application of the UL Doppler correction and the value of the UL Doppler correction. After receiving the information, the UE may apply the estimated / indicated Doppler correction value to the UL signal / channel (eg, PUSCH (PUSCH including DMRS / data signal)).
  • PUSCH PUSCH including DMRS / data signal
  • FIG. 4 is a diagram showing an example of Doppler correction application for transmission of UL signal / channel in the first embodiment.
  • the configuration of the RRH of FIG. 4 is the same as that of FIG. In FIG. 4, the BBU, the moving route, and the moving body are not shown for the sake of simplicity.
  • the Doppler correction of + offset is performed. Apply the value. Further, the UE applies the Doppler correction value of ⁇ f offset when transmitting the UL signal / channel to the TRP (TRP # 2n) on the traveling direction side by using the UE panel # 2. By applying these Doppler corrections, each TRP can reduce the Doppler shift of -f D and + f D.
  • the Doppler correction (value) applied to the UL signal / channel can be appropriately determined.
  • Embodiment 2-1 The UE is configured via RRC signaling whether to apply Doppler correction for the transmission of UL signals / channels to a particular beam / spatial relationship / UL TCI / UE panel / TRP in a serving cell. You may.
  • FIG. 5 is a diagram showing an example of application of Doppler correction for transmission of UL signal / channel in the second embodiment.
  • the RRH has 6 TRPs, each with a different TCI state (TCI # 0- # 5) based on the geographic domain (physical location) of the UE. Sending and receiving channels.
  • Embodiment 2-1 it may be set whether or not to apply Doppler correction for transmission of UL signal / channel for a specific TCI state to the UE via RRC signaling. For example, apply Doppler correction for the transmission of UL signals / channels to TCI # 0, TCI # 1 and TCI # 2 via RRC signaling to the UE, TCI # 3, TCI # 4 and TCI # 5 may be configured not to apply Doppler correction for UL signal / channel transmission.
  • Embodiment 2-2 The UE applies, via RRC signaling, whether or not to apply Doppler correction for the transmission of UL signals / channels to a particular beam / spatial relationship / UL TCI / UE panel / TRP in a serving cell.
  • Doppler correction value and may be set.
  • the Doppler correction value to be applied may be set / instructed to the UE by using at least one of higher layer signaling (for example, RRC signaling) and physical layer signaling (for example, DCI). Further, as the Doppler correction value to be applied, the absolute value may be notified to the UE, or the information (index) for notifying the value to be applied from a plurality of values (candidate values) is notified to the UE. You may. Further, the UL Doppler correction value applied by the UE may be a correction value calculated from the DL Doppler correction value, may be determined by the UE based on the movement speed of the UE itself, or may be determined by the UE. It may be notified from a terminal (for example, a mobile body carrying the UE).
  • a terminal for example, a mobile body carrying the UE.
  • Embodiment 2-2 will be described with reference to FIG.
  • TCI # 0, TCI # 1 and TCI # 2 via RRC signaling to the UE.
  • the Doppler correction value corresponding to each TCI state may be notified.
  • TCI # 3, TCI # 4 and TCI # 5 may be notified of Doppler correction values indicating that the Doppler correction for transmission of UL signals / channels is not applied.
  • TCI # 0, TCI # 1 and TCI # 2 are notified that the Doppler correction value # a, Doppler correction value # b and Doppler correction value # c are applied, respectively, and TCI # 3 and TCI # are notified.
  • 4 and TCI # 5 may be notified of the Doppler correction value # d indicating that the Doppler correction is not applied, respectively.
  • the Doppler correction value #d may be a specific value (for example, 0).
  • ⁇ Third embodiment> a case will be described in which the setting information for setting the application of Doppler correction for UL signal / channel transmission is notified to the UE via the MAC CE.
  • Embodiment 3-1 The UE is configured to use MAC CE to apply Doppler correction for UL signal / channel transmission to a particular beam / spatial relationship / UL TCI / UE panel / TRP in a serving cell. You may.
  • the MAC CE used for applying Doppler correction for UL signal / channel transmission may include a plurality of specific fields.
  • the plurality of specific fields include a field indicating a serving cell (serving cell ID field), a field indicating a BWP (BWP ID field), a field indicating a spatial relationship / TCI state (spatial relationship field / TCI state field), and each of them. It may include at least one of the Doppler correction instruction fields for transmitting the UL signal / channel to the spatial relationship / TCI state field (Embodiment 3-1-1).
  • the Doppler correction instruction field may have a specific number of bits (for example, 1 bit).
  • FIG. 6A is a diagram showing an example of MAC CE in the third embodiment.
  • the MAC CE of the example shown in FIG. 6A includes a serving cell ID field, a BWP ID field, a TCI state field (TCI state # 1- # i (i is a positive integer)), and a Doppler correction instruction field (DC_1) corresponding to the TCI state. -I) and reserved bits (denoted as R) are included.
  • DC_i is a Doppler correction instruction field corresponding to the TCI state #i.
  • the UE may decide whether to apply the Doppler correction to the corresponding TCI state based on the Doppler correction instruction field.
  • the MAC CE corresponds to each of a field indicating a serving cell (serving cell ID field), a field indicating a BWP (BWP ID field), and a TCI state (active TCI state). It may include at least one of the Doppler correction instruction fields for the transmission of UL signals / channels (Embodiment 3-1-2). If the Doppler correction indicator field indicates a first value (eg, 0), the UE does not have to apply Doppler correction to the active TCI state corresponding to the field indicating the first value. good. Also, if the Doppler correction instruction field indicates a second value (eg, 1), the UE applies Doppler correction to the active TCI state corresponding to the field indicating the second value. May be good.
  • a first value eg, 0
  • the Doppler correction instruction field indicates a second value (eg, 1)
  • the UE applies Doppler correction to the active TCI state corresponding to the field indicating the second value. May be good.
  • FIG. 6B is a diagram showing another example of MAC CE in the third embodiment.
  • the MAC CE of the example shown in FIG. 6B includes a serving cell ID field, a BWP ID field, a Doppler correction instruction field (described as T0-T127) corresponding to the TCI state, and a reserved bit (described as R).
  • Ti i is a positive integer
  • the UE may decide whether to apply the Doppler correction to the corresponding TCI state based on the value of the Doppler correction instruction field.
  • the MAC CE may not include the inactive TCI state and may include only the active TCI state.
  • the TCI state #i may indicate the i-th active TCI state. If the MAC CE contains only the active TCI state, the overhead of notification to the UE can be reduced.
  • Embodiment 3-2 The UE applies, via RRC signaling, whether or not to apply Doppler correction for the transmission of UL signals / channels to a particular beam / spatial relationship / UL TCI / UE panel / TRP in a serving cell.
  • Doppler correction value and may be set.
  • the MAC CE used for applying Doppler correction for UL signal / channel transmission may include a plurality of specific fields.
  • the plurality of specific fields include a field indicating a serving cell (serving cell ID field), a field indicating a BWP (BWP ID field), a field indicating a spatial relationship / TCI state (spatial relationship field / TCI state field), and each of them. It may include at least one of a field for indicating the value of Doppler correction for transmission of the UL signal / channel with respect to the spatial relationship / TCI state field (Embodiment 3-2-1).
  • the field for indicating the Doppler correction value may be a specific number of bits (for example, x bits (x is an integer)), may be based on the number of Doppler correction values supported by the UE, and 0. It may be included.
  • the field for instructing the Doppler correction value may indicate an absolute correction value or a reference value (relative value, offset) based on a specific correction value.
  • the specific correction value may be, for example, the first non-zero correction value included in the MAC CE.
  • the MAC CE corresponds to each of a field indicating a serving cell (serving cell ID field), a field indicating a BWP (BWP ID field), and a TCI state (active TCI state). It may include at least one of the fields for indicating the Doppler correction value for the transmission of the UL signal / channel (Embodiment 3-1-2). If the Doppler correction indicator field indicates a first value (eg, 0), the UE does not have to apply Doppler correction to the active TCI state corresponding to the field indicating the first value. good. Also, if the Doppler correction instruction field indicates a second value (eg, 1), the UE applies Doppler correction to the active TCI state corresponding to the field indicating the second value. May be good.
  • a first value eg, 0
  • the Doppler correction instruction field indicates a second value (eg, 1)
  • the UE applies Doppler correction to the active TCI state corresponding to the field indicating the second value. May be
  • Embodiment 4-1 Does the UE apply Doppler correction for the transmission of UL signals / channels to a particular beam / spatial relationship / UL TCI / UE panel / TRP in a serving cell using a particular field contained in the DCI? You may be instructed whether or not.
  • the particular field may be included in the DCI when certain higher layer signaling (eg, RRC signaling) for Doppler correction for transmission of UL signals / channels is configured.
  • the DCI containing the particular field may be a DCI (eg DCI format 1_0 / 1-1) that schedules transmission of UL signals / channels (eg PUSCH).
  • the DCI including the specific field may be a DCI format other than the DCI that schedules the transmission of the UL signal / channel (for example, PUSCH), or a newly defined DCI format that assumes the operation of HST. But it may be.
  • the specific field may have a specific number of bits (for example, 1). If the UE receives the particular field, which is the first code point (eg, 0), it may decide not to apply the UL Doppler correction. Also, if the UE receives the particular field, which is the second code point (eg, 1), it may decide to apply UL Doppler correction.
  • Embodiment 4-1 will also be described with reference to FIG. In Embodiment 4-1 for example, it may be set whether or not to apply Doppler correction for transmission of UL signal / channel to a specific TCI state by utilizing a specific field included in DCI. .. For example, when the value (code point) of the specific field indicates the first value (for example, 0), the UE determines that the Doppler correction is not applied, and the value (code point) of the specific field is the first value. When showing a value of 2 (eg, 1), the UE may decide to apply Doppler correction.
  • a value of 2 eg, 1
  • a Doppler correction for UL signal / channel transmission is applied to TCI # 1 for PUSCH transmission by utilizing a specific field included in DCI for the UE.
  • TCI # 3 for PUSCH transmission may be instructed not to apply Doppler correction for UL signal / channel transmission.
  • Embodiment 4-2 Does the UE apply Doppler correction for the transmission of UL signals / channels to a particular beam / spatial relationship / UL TCI / UE panel / TRP in a serving cell using a particular field contained in the DCI? You may be instructed whether or not and the value of the Doppler correction.
  • the particular field may be included in the DCI when certain higher layer signaling (eg, RRC signaling) for Doppler correction for transmission of UL signals / channels is configured.
  • the DCI containing the particular field may be a DCI (eg DCI format 1_0 / 1-1) that schedules transmission of UL signals / channels (eg PUSCH). Also, the DCI containing the particular field may be in a DCI format other than DCI that schedules the transmission of UL signals / channels (eg, PUSCH).
  • the specific field may have a specific number of bits (eg, 2). If the UE receives the particular field at a particular code point (eg 00), it may decide not to apply the UL Doppler correction. Further, when the UE receives the specific field which is a code point other than the specific code point (for example, 01, 10, 11), it may be determined to apply the UL Doppler correction. At this time, the UE determines a candidate value corresponding to the code point indicated by the DCI from a plurality of Doppler correction candidate values preset in the upper layer signaling, and applies the candidate value to the transmission of the UL signal / channel. May be good.
  • Embodiment 4-2 will also be described with reference to FIG.
  • whether or not Doppler correction for transmission of UL signal / channel for a specific TCI state is applied to each TCI state by using a specific field included in the DCI for the UE, and each TCI state.
  • the corresponding Doppler correction value may be indicated.
  • the UE may determine whether or not the Doppler correction is applied based on the Doppler correction value corresponding to each indicated TCI state.
  • the Doppler correction value for the transmission of the UL signal / channel is set for TCI # 1 for the PUSCH transmission by using the specific field included in the DCI.
  • the indicated field value (code point, eg, 10) is notified, and the UE may determine the Doppler correction value to be applied based on the value of the field.
  • the UE is notified of a field value (code point, for example, 00) indicating that the Doppler correction for UL signal / channel transmission is not applied to TCI # 3 for PUSCH transmission, and the UE is notified. May decide not to apply Doppler correction to TCI # 3 based on the value of the field.
  • the field for instructing the Doppler correction value may indicate an absolute correction value or a reference value (relative value, offset) based on a specific correction value.
  • UE capability relating to the application of Doppler correction for transmission of UL signals / channels will be described.
  • the UE may report (transmit) to the NW as to whether or not it has the capability.
  • the UE capability for applying Doppler correction for UL signal / channel transmission is as to whether Doppler correction for PUSCH / PUCCH corresponding to one beam / spatial relationship / UL TCI / UE panel / TRP is supported. May be defined.
  • the UE capability for applying Doppler correction for UL signal / channel transmission is RRC signaling / MAC CE / for one beam / spatial relationship / UL TCI / UE panel / PUSCH / PUCCH corresponding to TRP. It may be defined as whether Doppler correction based on settings / instructions utilizing DCI is supported.
  • the UE capability for applying Doppler correction for UL signal / channel transmission corresponds to one beam / spatial relationship / UL TCI / UE panel / TRP for multiple serving cells, Doppler for PUSCH / PUCCH. Corrections may be defined as whether they are supported in common / independently.
  • the UE when the UE reports the UE capability corresponding to at least one of the above to the NW, and for the UE, the UE is set / activated by higher layer signaling for the at least one UE capability. / When instructed, it may be applied under at least one of the conditions.
  • Each embodiment of the present disclosure may be applied to a UE when certain higher layer parameters are set / activated / instructed.
  • wireless communication system Wireless communication system
  • communication is performed using any one of the wireless communication methods according to each of the above-described embodiments of the present disclosure or a combination thereof.
  • FIG. 7 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
  • the wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by Third Generation Partnership Project (3GPP). ..
  • the radio communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
  • MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and dual connectivity between NR and LTE (NR-E).
  • -UTRA Dual Connectivity (NE-DC) may be included.
  • the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)).
  • the base station (gNB) of NR is MN
  • the base station (eNB) of LTE (E-UTRA) is SN.
  • the wireless communication system 1 has dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) May be supported.
  • a plurality of base stations in the same RAT for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )
  • NR-NR Dual Connectivity NR-DC
  • gNB NR base stations
  • the wireless communication system 1 includes a base station 11 that forms a macro cell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. You may prepare.
  • the user terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminal 20 are not limited to the mode shown in the figure.
  • the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.
  • the user terminal 20 may be connected to at least one of the plurality of base stations 10.
  • the user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation (CA)) and dual connectivity (DC) using a plurality of component carriers (Component Carrier (CC)).
  • CA Carrier Aggregation
  • DC dual connectivity
  • CC Component Carrier
  • Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)).
  • the macro cell C1 may be included in FR1 and the small cell C2 may be included in FR2.
  • FR1 may be in a frequency band of 6 GHz or less (sub 6 GHz (sub-6 GHz)), and FR2 may be in a frequency band higher than 24 GHz (above-24 GHz).
  • the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.
  • the user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • the plurality of base stations (for example, RRH) 10 may be connected by wire (for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
  • wire for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.
  • NR communication for example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the higher-level station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to a relay station (relay) is IAB. It may be called a node.
  • IAB Integrated Access Backhaul
  • relay station relay station
  • the base station 10 may be connected to the core network 30 via another base station 10 or directly.
  • the core network 30 may include at least one such as Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).
  • EPC Evolved Packet Core
  • 5GCN 5G Core Network
  • NGC Next Generation Core
  • the user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.
  • a wireless access method based on Orthogonal Frequency Division Multiplexing may be used.
  • OFDM Orthogonal Frequency Division Multiplexing
  • DL Downlink
  • UL Uplink
  • CP-OFDM Cyclic Prefix OFDM
  • DFT-s-OFDM Discrete Fourier Transform Spread OFDM
  • OFDMA Orthogonal Frequency Division Multiple. Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the wireless access method may be called a waveform.
  • another wireless access system for example, another single carrier transmission system, another multi-carrier transmission system
  • the UL and DL wireless access systems may be used as the UL and DL wireless access systems.
  • downlink shared channels Physical Downlink Shared Channel (PDSCH)
  • broadcast channels Physical Broadcast Channel (PBCH)
  • downlink control channels Physical Downlink Control
  • Channel PDCCH
  • the uplink shared channel Physical Uplink Shared Channel (PUSCH)
  • the uplink control channel Physical Uplink Control Channel (PUCCH)
  • the random access channel shared by each user terminal 20 are used.
  • Physical Random Access Channel (PRACH) Physical Random Access Channel or the like may be used.
  • PDSCH User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH.
  • User data, upper layer control information, and the like may be transmitted by the PUSCH.
  • MIB Master Information Block
  • PBCH Master Information Block
  • Lower layer control information may be transmitted by PDCCH.
  • the lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH.
  • DCI Downlink Control Information
  • the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc.
  • the DCI that schedules PUSCH may be called UL grant, UL DCI, etc.
  • the PDSCH may be read as DL data
  • the PUSCH may be read as UL data.
  • a control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used to detect PDCCH.
  • CORESET corresponds to a resource for searching DCI.
  • the search space corresponds to the search area and search method of PDCCH candidates (PDCCH candidates).
  • One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a search space based on the search space settings.
  • One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
  • One or more search spaces may be referred to as a search space set.
  • the "search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. of the present disclosure may be read as each other.
  • channel state information (Channel State Information (CSI)
  • delivery confirmation information for example, it may be called Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.
  • scheduling request (Scheduling Request () Uplink Control Information (UCI) including at least one of SR)
  • the PRACH may transmit a random access preamble to establish a connection with the cell.
  • downlinks, uplinks, etc. may be expressed without “links”. Further, it may be expressed without adding "Physical" at the beginning of various channels.
  • a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like may be transmitted.
  • the DL-RS includes a cell-specific reference signal (CRS), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a demodulation reference signal (DeModulation).
  • Reference Signal (DMRS)), positioning reference signal (Positioning Reference Signal (PRS)), phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like may be transmitted.
  • the synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • the signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SS Block (SSB) and the like.
  • SS, SSB and the like may also be called a reference signal.
  • a measurement reference signal Sounding Reference Signal (SRS)
  • a demodulation reference signal DMRS
  • UL-RS Uplink Reference Signal
  • UE-specific Reference Signal UE-specific Reference Signal
  • FIG. 8 is a diagram showing an example of the configuration of the base station according to the embodiment.
  • the base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140.
  • the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may each be provided with one or more.
  • this example mainly shows the functional blocks of the feature portion in 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 part described below may be omitted.
  • the control unit 110 controls the entire base station 10.
  • the control unit 110 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
  • the control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping) and the like.
  • the control unit 110 may control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
  • the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 120.
  • the control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, management of radio resources, and the like.
  • the transmission / reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123.
  • the baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212.
  • the transmission / reception unit 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like, which are described based on common recognition in the technical fields according to the present disclosure. be able to.
  • the transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
  • the transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122.
  • the receiving unit may be composed of a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.
  • the transmitting / receiving antenna 130 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.
  • the transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmission / reception unit 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.
  • the transmission / reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
  • digital beamforming for example, precoding
  • analog beamforming for example, phase rotation
  • the transmission / reception unit 120 processes, for example, Packet Data Convergence Protocol (PDCP) layer processing and Radio Link Control (RLC) layer processing (for example, RLC) for data, control information, etc. acquired from control unit 110.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • HARQ retransmission control HARQ retransmission control
  • the transmission / reception unit 120 performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) for the bit string to be transmitted.
  • the base band signal may be output by performing processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, digital-analog conversion, and other transmission processing.
  • IFFT inverse fast Fourier transform
  • the transmission / reception unit 120 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 130. ..
  • the transmission / reception unit 120 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 130.
  • the transmission / reception unit 120 (reception processing unit 1212) performs analog-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) Processing (if necessary), filtering, decoding, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing are applied. User data and the like may be acquired.
  • FFT fast Fourier transform
  • IDFT inverse discrete Fourier transform
  • the transmission / reception unit 120 may perform measurement on the received signal.
  • the measuring unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, or the like based on the received signal.
  • the measuring unit 123 has received power (for example, Reference Signal Received Power (RSRP)) and reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)).
  • RSRP Reference Signal Received Power
  • RSSQ Reference Signal Received Quality
  • SINR Signal to Noise Ratio
  • Signal strength for example, Received Signal Strength Indicator (RSSI)
  • propagation path information for example, CSI
  • the measurement result may be output to the control unit 110.
  • the transmission line interface 140 transmits / receives signals (backhaul signaling) to / from a device included in the core network 30, another base station 10 and the like, and provides user data (user plane data) and control plane for the user terminal 20. Data or the like may be acquired or transmitted.
  • the transmitting unit and the receiving unit of the base station 10 in the present disclosure may be composed of at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
  • the transmission / reception unit 120 may transmit information regarding application of Doppler correction for transmission of a physical uplink shared channel (PUSCH) to one or more transmission / reception points arranged in a movement path.
  • the control unit 110 may control the reception of the PUSCH to which the Doppler correction is applied based on the information (first embodiment).
  • FIG. 9 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
  • the user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230.
  • the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided with one or more.
  • this example mainly shows the functional blocks of the feature portion in the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
  • the control unit 210 controls the entire user terminal 20.
  • the control unit 210 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
  • the control unit 210 may control signal generation, mapping, and the like.
  • the control unit 210 may control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230.
  • the control unit 210 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 220.
  • the transmission / reception unit 220 may include a baseband unit 221 and an RF unit 222, and a measurement unit 223.
  • the baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212.
  • the transmission / reception unit 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like, which are described based on the 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 composed of a transmission unit and a reception unit.
  • the transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222.
  • the receiving unit may be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.
  • the transmitting / receiving antenna 230 can be composed of an antenna described based on the common recognition in the technical field according to the present disclosure, for example, an array antenna.
  • the transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.
  • the transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
  • digital beamforming for example, precoding
  • analog beamforming for example, phase rotation
  • the transmission / reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), and MAC layer processing (for example, for data, control information, etc. acquired from the control unit 210). , HARQ retransmission control), etc., to generate a bit string to be transmitted.
  • RLC layer processing for example, RLC retransmission control
  • MAC layer processing for example, for data, control information, etc. acquired from the control unit 210.
  • HARQ retransmission control HARQ retransmission control
  • the transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (may include error correction coding), modulation, mapping, filtering processing, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed to output the baseband signal.
  • Whether or not to apply the DFT process may be based on the transform precoding setting.
  • the transmission / reception unit 220 transmits the channel using the DFT-s-OFDM waveform.
  • the DFT process may be performed as the transmission process, and if not, the DFT process may not be performed as the transmission process.
  • the transmission / reception unit 220 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 230. ..
  • the transmission / reception unit 220 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 230.
  • the transmission / reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, and decoding (error correction) for the acquired baseband signal. Decoding may be included), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
  • the transmission / reception unit 220 may perform measurement on the received signal.
  • the measuring unit 223 may perform RRM measurement, CSI measurement, or the like based on the received signal.
  • the measuring unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like.
  • the measurement result may be output to the control unit 210.
  • the transmitter and receiver of the user terminal 20 in the present disclosure may be composed of at least one of the transmitter / receiver 220 and the transmitter / receiver antenna 230.
  • the transmission / reception unit 220 may receive information regarding the application of Doppler correction for transmission of the physical uplink shared channel (PUSCH) to one or more transmission / reception points arranged in the movement path.
  • the control unit 210 may determine the application of the Doppler correction to each of the one or more transmission / reception points based on the information (first embodiment).
  • the information indicates at least one of the application of Doppler correction for transmission of the PUSCH and the Doppler correction value, and the transmission / reception unit 220 may receive the information via radio resource control signaling (second embodiment). form).
  • the information indicates at least one of the application of Doppler correction for transmission of the PUSCH and the Doppler correction value, and the transmission / reception unit 220 may receive the information via a media access control control element (third). Embodiment).
  • the information indicates at least one of the application of Doppler correction for transmission of the PUSCH and the Doppler correction value, and the transmission / reception unit 220 may receive the information by using the downlink control information (fourth). Embodiment).
  • each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices.
  • the functional block may be realized by combining the software with the one device or the plurality of devices.
  • the functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
  • a functional block (constituent unit) for functioning transmission may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
  • the method of realizing each of them is not particularly limited.
  • the base station, user terminal, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
  • FIG. 10 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
  • the base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. ..
  • the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
  • processor 1001 may be a plurality of processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by using other methods by two or more processors.
  • the processor 1001 may be mounted by one or more chips.
  • the processor 1001 For each function of the base station 10 and the user terminal 20, for example, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation and communicates via the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
  • predetermined software program
  • Processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like.
  • CPU central processing unit
  • control unit 110 210
  • transmission / reception unit 120 220
  • the like may be realized by the processor 1001.
  • the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
  • a program program code
  • the control unit 110 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized in the same manner for other functional blocks.
  • the memory 1002 is a computer-readable recording medium, for example, at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EPROM), a Random Access Memory (RAM), or any other suitable storage medium. It may be composed of one.
  • the memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, and is, for example, a flexible disk, a floppy (registered trademark) disk, an optical magnetic disk (for example, a compact disc (Compact Disc ROM (CD-ROM)), a digital versatile disk, etc.). At least one of Blu-ray® disks, removable disks, optical disc drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers, and other suitable storage media. It may be composed of.
  • the storage 1003 may be referred to as an auxiliary storage device.
  • the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)). May be configured to include.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmission / reception unit 120 (220), the transmission / reception antenna 130 (230), and the like described above may be realized by the communication device 1004.
  • the transmission / reception unit 120 (220) may be physically or logically separated from the transmission unit 120a (220a) and the reception unit 120b (220b).
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information.
  • the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
  • the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like. It may be configured to include hardware, and a part or all of each functional block may be realized by using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings.
  • channels, symbols and signals may be read interchangeably.
  • the signal may be a message.
  • the reference signal may be abbreviated as RS, and may be referred to as a pilot, a pilot signal, or the like depending on the applied standard.
  • the component carrier Component Carrier (CC)
  • CC Component Carrier
  • the wireless frame may be composed of one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) constituting the wireless frame may be referred to as a subframe.
  • the subframe may be composed of one or more slots in the time domain.
  • the subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.
  • the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel.
  • Numerology includes, for example, subcarrier spacing (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, and wireless frame configuration.
  • SCS subcarrier Spacing
  • TTI Transmission Time Interval
  • a specific filtering process performed by the transmitter / receiver in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
  • the slot may be composed of one or more symbols (Orthogonal Frequency Division Multiple Access (OFDMA) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the slot may be a time unit based on numerology.
  • the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain.
  • the mini-slot may also be referred to as a sub-slot.
  • a minislot may consist of a smaller number of symbols than the slot.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than the minislot may be referred to as a PDSCH (PUSCH) mapping type A.
  • the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.
  • the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
  • the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
  • the time units such as frames, subframes, slots, mini slots, and symbols in the present disclosure may be read as each other.
  • one subframe may be called TTI
  • a plurality of consecutive subframes may be called TTI
  • one slot or one minislot may be called TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be.
  • the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
  • the base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units.
  • the definition of TTI is not limited to this.
  • the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
  • the time interval for example, the number of symbols
  • the transport block, code block, code word, etc. may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
  • TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.
  • the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
  • a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
  • the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
  • the number of subcarriers contained in the RB may be determined based on numerology.
  • the RB may include one or more symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe or 1 TTI.
  • Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
  • One or more RBs are a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, and an RB. It may be called a pair or the like.
  • Physical RB Physical RB (PRB)
  • SCG sub-carrier Group
  • REG resource element group
  • the resource block may be composed of one or a plurality of resource elements (Resource Element (RE)).
  • RE Resource Element
  • 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
  • Bandwidth Part (which may also be called partial bandwidth, etc.) represents a subset of consecutive common resource blocks (RBs) for a numerology in a carrier. May be good.
  • the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • the BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
  • BWP UL BWP
  • BWP for DL DL BWP
  • One or more BWPs may be set in one carrier for the UE.
  • At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP.
  • “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
  • the above-mentioned structures such as wireless frames, subframes, slots, mini slots, and symbols are merely examples.
  • the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
  • the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
  • the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, radio resources may be indicated by a given index.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
  • information, signals, etc. can be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layers.
  • Information, signals, etc. may be input / output via a plurality of network nodes.
  • Input / output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, signals, etc. can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.
  • the notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using other methods.
  • the notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (DCI)), uplink control information (Uplink Control Information (UCI))), and upper layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (master information block (MIB)), system information block (System Information Block (SIB), etc.), media access control (Medium Access Control (MAC)) signaling, etc. It may be carried out by a signal or a combination thereof.
  • DCI downlink control information
  • UCI Uplink Control Information
  • RRC Radio Resource Control
  • MIB master information block
  • SIB System Information Block
  • MAC Media Access Control
  • the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like.
  • the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
  • MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).
  • CE MAC Control Element
  • the notification of predetermined information is not limited to the explicit notification, but implicitly (for example, by not notifying the predetermined information or another information). May be done (by notification of).
  • the determination may be made by a value represented by 1 bit (0 or 1), or by a boolean value represented by true or false. , May be done by numerical comparison (eg, comparison with a given value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
  • Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • a transmission medium For example, a website where software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.).
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • the terms “system” and “network” used in this disclosure may be used interchangeably.
  • the “network” may mean a device (eg, a base station) included in the network.
  • precoding "precoding weight”
  • QCL Quality of Co-Co-Location
  • TCI state Transmission Configuration Indication state
  • space "Spatial relation”, “spatial domain filter”, “transmission power”, “phase rotation”, "antenna port”, “antenna port group”, “layer”, “number of layers”
  • Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, "antenna”, “antenna element", “panel” are compatible.
  • Base station BS
  • radio base station fixed station
  • NodeB NodeB
  • eNB eNodeB
  • gNB gNodeB
  • Access point "Transmission point (Transmission Point (TP))
  • RP Reception point
  • TRP Transmission / Reception Point
  • Panel , "Cell”, “sector”, “cell group”, “carrier”, “component carrier” and the like
  • Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
  • the base station can accommodate one or more (for example, three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio)).
  • Communication services can also be provided by Head (RRH))).
  • RRH Head
  • the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage.
  • MS mobile station
  • UE user equipment
  • terminal terminal
  • Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , Handset, user agent, mobile client, client or some other suitable term.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like.
  • At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
  • the moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be.
  • at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
  • at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read by the user terminal.
  • communication between a base station and a user terminal has been replaced with communication between a plurality of user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
  • D2D Device-to-Device
  • V2X Vehicle-to-Everything
  • Each aspect / embodiment of the present disclosure may be applied to the configuration.
  • the user terminal 20 may have the function of the base station 10 described above.
  • words such as "up” and “down” may be read as words corresponding to communication between terminals (for example, "side”).
  • the upstream channel, the downstream channel, and the like may be read as a side channel.
  • the user terminal in the present disclosure may be read as a base station.
  • the base station 10 may have the functions of the user terminal 20 described above.
  • the operation performed by the base station may be performed by its upper node (upper node) in some cases.
  • various operations performed for communication with a terminal are performed by the base station and one or more network nodes other than the base station (for example,).
  • Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. can be considered, but it is not limited to these), or it is clear that it can be performed by a combination thereof.
  • each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • Future Radio Access FAA
  • New-Radio Access Technology RAT
  • NR New Radio
  • NX New radio access
  • Future generation radio access FX
  • GSM Global System for Mobile communications
  • CDMA2000 Code Division Multiple Access
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi (registered trademark)
  • LTE 802.16 WiMAX (registered trademark)
  • a plurality of systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).
  • references to elements using designations such as “first” and “second” as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted or that the first element must somehow precede the second element.
  • determining used in this disclosure may include a wide variety of actions.
  • judgment (decision) means judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry) ( For example, searching in a table, database or another data structure), ascertaining, etc. may be considered to be "judgment”.
  • judgment (decision) includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access (for example). It may be regarded as “judgment (decision)" of "accessing” (for example, accessing data in memory).
  • judgment (decision) is regarded as “judgment (decision)” of solving, selecting, selecting, establishing, comparing, and the like. May be good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of some action.
  • connection are any direct or indirect connection or connection between two or more elements. Means, and can include the presence of one or more intermediate elements between two elements that are “connected” or “joined” to each other.
  • the connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
  • the radio frequency region when two elements are connected, one or more wires, cables, printed electrical connections, etc. are used, and as some non-limiting and non-comprehensive examples, the radio frequency region, microwaves. It can be considered to be “connected” or “coupled” to each other using electromagnetic energy having wavelengths in the region, light (both visible and invisible) regions, and the like.
  • the term "A and B are different” may mean “A and B are different from each other”.
  • the term may mean that "A and B are different from C”.
  • Terms such as “separate” and “combined” may be interpreted in the same way as “different”.

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

Abstract

Un terminal selon un aspect de la présente invention comprend : une unité de réception qui reçoit des informations concernant l'application d'une correction Doppler pour la transmission d'un canal physique partagé montant (PUSCH) à un ou plusieurs points de transmission/réception situés sur un trajet de déplacement ; et une unité de contrôle qui détermine, sur la base des informations, s'il faut appliquer la correction Doppler pour chacun du ou des points de transmission/réception. Selon un aspect de la présente invention, une communication sans fil exécutée sur un corps mobile peut être contrôlée de manière appropriée.
PCT/JP2021/000777 2021-01-13 2021-01-13 Terminal, procédé de communication sans fil et station de base WO2022153379A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008096408A1 (fr) * 2007-02-05 2008-08-14 Fujitsu Limited Dispositif d'entrée-sortie sans fil
US20170289991A1 (en) * 2015-11-09 2017-10-05 Telefonaktiebolaget Lm Ericsson (Publ) Uplink resource allocation in a unidirectional single frequency network arrangement for high speed trains

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008096408A1 (fr) * 2007-02-05 2008-08-14 Fujitsu Limited Dispositif d'entrée-sortie sans fil
US20170289991A1 (en) * 2015-11-09 2017-10-05 Telefonaktiebolaget Lm Ericsson (Publ) Uplink resource allocation in a unidirectional single frequency network arrangement for high speed trains

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