WO2024225349A1 - 端末、基地局及び通信方法 - Google Patents

端末、基地局及び通信方法 Download PDF

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Publication number
WO2024225349A1
WO2024225349A1 PCT/JP2024/016157 JP2024016157W WO2024225349A1 WO 2024225349 A1 WO2024225349 A1 WO 2024225349A1 JP 2024016157 W JP2024016157 W JP 2024016157W WO 2024225349 A1 WO2024225349 A1 WO 2024225349A1
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WO
WIPO (PCT)
Prior art keywords
base station
terminal
cell
drx
dtx
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/JP2024/016157
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English (en)
French (fr)
Japanese (ja)
Inventor
優元 ▲高▼橋
聡 永田
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NTT Docomo Inc
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NTT Docomo Inc
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Filing date
Publication date
Application filed by NTT Docomo Inc filed Critical NTT Docomo Inc
Priority to EP24797095.7A priority Critical patent/EP4704472A1/en
Priority to JP2025516865A priority patent/JPWO2024225349A1/ja
Priority to CN202480020365.2A priority patent/CN120898482A/zh
Publication of WO2024225349A1 publication Critical patent/WO2024225349A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a terminal, a base station, and a communication method in a wireless communication system.
  • Non-Patent Document 1 For NR (New Radio) (also known as “5G”), the successor system to LTE (Long Term Evolution), technologies are being considered that meet the requirements of a large-capacity system, high data transmission speed, low latency, simultaneous connection of many terminals, low cost, and low power consumption (for example, Non-Patent Document 1).
  • Non-Patent Document 2 In addition, in Release 18 of 3GPP (registered trademark), network energy savings have become increasingly important in order to achieve environmental sustainability, carbon neutrality, SDGs (Sustainable Development Goals), reduced operating costs, etc., and methods for saving energy are being considered (for example, Non-Patent Document 2).
  • the present invention has been made in consideration of the above points, and aims to dynamically enable or disable intermittent transmission and reception at a base station.
  • a terminal has a control unit that assumes that a base station executes an intermittent transmission function that enables or disables a transmission unit, a communication unit that executes reception from the base station based on the assumed intermittent transmission function, and a receiving unit that receives control information related to the intermittent transmission function from the base station, and the control unit determines whether to assume that a physical downlink control channel that notifies the base station that at least one of cell intermittent transmission and cell intermittent reception will be dynamically enabled or disabled during an inactive period in the intermittent transmission function is received from the base station.
  • the disclosed technology provides a technique for dynamically enabling or disabling intermittent transmission and reception at a base station.
  • FIG. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention.
  • FIG. 2 is a diagram for explaining discontinuous reception of a base station according to a first embodiment of the present invention;
  • FIG. 2 is a diagram for explaining each parameter according to the first embodiment of the present invention.
  • FIG. 13 is a diagram for explaining intermittent transmission by a base station according to a fifth embodiment of the present invention.
  • FIG. 13 is a diagram for explaining each parameter according to Example 5 of an embodiment of the present invention.
  • 13 is a flowchart for explaining an example of cell DTX according to a ninth embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a base station according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station or a terminal according to an embodiment of the present invention.
  • 1 is a diagram showing an example of a configuration of a vehicle according to an embodiment of the present invention;
  • LTE Long Term Evolution
  • LTE-Advanced LTE-Advanced
  • systems beyond LTE-Advanced e.g., NR
  • SS Synchronization signal
  • PSS Primary SS
  • SSS Secondary SS
  • PBCH Physical broadcast channel
  • PRACH Physical random access channel
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • NR corresponds to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc.
  • NR- even if a signal is used in NR, it is not necessarily specified as "NR-".
  • the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or another method (e.g., Flexible Duplex, etc.).
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • another method e.g., Flexible Duplex, etc.
  • radio parameters and the like when radio parameters and the like are “configured,” it may mean that predetermined values are pre-configured, or that radio parameters notified from a base station or terminal are configured.
  • FIG. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention.
  • a wireless communication system according to an embodiment of the present invention includes a base station 10 and a terminal 20.
  • Fig. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.
  • the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
  • the physical resources of the wireless signal are defined in the time domain and the frequency domain, and the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks.
  • the TTI Transmission Time Interval
  • the time domain may be a slot, or the TTI may be a subframe.
  • the base station 10 transmits a synchronization signal and system information to the terminal 20.
  • the synchronization signal is, for example, NR-PSS and NR-SSS.
  • the system information is, for example, transmitted by NR-PBCH and is also called broadcast information.
  • the synchronization signal and system information may be called SSB (SS/PBCH block).
  • the base station 10 transmits a control signal or data to the terminal 20 in DL (Downlink) and receives a control signal or data from the terminal 20 in UL (Uplink). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming.
  • both the base station 10 and the terminal 20 are capable of applying communication by MIMO (Multiple Input Multiple Output) to DL or UL.
  • both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) by CA (Carrier Aggregation).
  • SCell Secondary Cell
  • PCell Primary Cell
  • CA Carrier Aggregation
  • the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).
  • DC Direct Connectivity
  • the terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives control signals or data from the base station 10 in DL and transmits control signals or data to the base station 10 in UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 also receives various reference signals transmitted from the base station 10, and performs measurement of propagation path quality based on the reception results of the reference signals.
  • the terminal 20 may be referred to as a UE, and the base station 10 as a gNB.
  • Figure 2 is a diagram to explain CDRX in NR Release 15.
  • the terminal monitors the PDCCH during the DRX on period.
  • FIG. 3 is a diagram to explain WUS in NR Release 16.
  • a PDCCH-based wake-up signal (WUS: Wake Up Signal) can instruct one or more terminals whether or not the terminals should monitor the PDCCH within the next DRX on period.
  • DCI format 2_6 in which the CRC (Cyclic Redundancy Check) is scrambled by the PS-RNTI (Power Saving - Radio Network Temporary Identifier), is used as a PDCCH-based WUS and is also called DCP (DCI with CRC scrambled by PS-RNTI).
  • CRC Cyclic Redundancy Check
  • PS-RNTI Power Saving - Radio Network Temporary Identifier
  • the monitoring opportunity of the WUS is set by an offset from the on-period based on the terminal capabilities. If the WUS indicates "inactive" (i.e., the terminal is not transmitting or receiving data), the terminal can skip monitoring during the on-period and immediately transition to sleep mode. Also, a default terminal operation can be set for cases where PDCCH-based WUS is not detected, for example due to a detection error.
  • DCI format 2_6 contains one bit of activation instruction information indicating "active" or "inactive.”
  • Example 1 In this embodiment, the operation of a base station when receiving discontinuously and definitions of related concepts will be described.
  • FIG. 4 is a diagram for explaining the intermittent reception of a base station according to Example 1 of an embodiment of the present invention.
  • the period during which the base station 10 disables/enables the receiving unit is introduced as an intermittent reception (gNB CDRX) function by the base station (hereinafter referred to as intermittent reception by base station).
  • gNB CDRX intermittent reception
  • the concept of discontinuous reception in the base station 10 is similar to that of the terminal 20.
  • the receiving units and/or parameters to be disabled may be per port, panel, beam, or carrier (or cell).
  • the base station CDRX may be defined by a number of parameters listed below.
  • the unit of the parameters may be a symbol, a slot, a subframe, a millisecond, or a second, etc.
  • the unit may be different or the same for each parameter.
  • drx-onDurationTimer period at the start of the DRX cycle
  • drx-SlotOffset delay before starting drx-onDurationTimer
  • drx-InactivityTimer period after an uplink reception opportunity during which the terminal 20 performs uplink transmission
  • drx-LongCycleStartOffset long DRX cycle (i.e., drx-LongCycle) and drx-StartOffset that define when the long and short DRX cycles start.
  • drx-ShortCycle short DRX cycle
  • drx-ShortCycleTimer period during which the base station 10 follows the short DRX cycle
  • drx-RetransmissionTimerUL maximum period until a grant for an uplink retransmission is received
  • drx-HARQ-RTT-TimerUL minimum period until an uplink retransmission grant is expected.
  • the base station 10 may receive an uplink channel transmitted from the terminal 20 when drx-onDurationTimer, drx-InactivityTimer, or drx-RetransmissionTimerUL is being executed.
  • the terminal 20 may perform one of the following optional operations:
  • the terminal 20 may perform an operation assuming the base station discontinuous reception. Specifically, the terminal 20 identifies the status of the base station discontinuous reception by RRC, MAC-CE, or DCI. In the case of DCI, it is assumed that the terminal 20 receives DCI indicating the status of the base station discontinuous reception from the base station 10. Details of the instruction by DCI will be described later in Example 3.
  • the terminal 20 may transmit an uplink channel while drx-onDurationTimer, drx-InactivityTimer, or drx-RetransmissionTimerUL is running.
  • the terminal 20 may ignore the DBR, specifically, the terminal 20 performs uplink transmissions as scheduled or configured by the base station 10, regardless of the DBR status.
  • the base station 10 may perform a schedule or setting that takes into account intermittent base station reception, or may perform a schedule or setting regardless of intermittent base station reception.
  • a schedule or setting that takes into account intermittent base station reception is performed, the intermittent base station reception function is realized even if the terminal 20 ignores intermittent base station reception.
  • unnecessary signal transmission is performed, resulting in unnecessary power consumption by the terminal 20.
  • the base station 10 may receive the uplink channel transmitted from the terminal 20 regardless of the base station intermittent reception parameter. That is, the base station 10 may keep the receiving unit on and continuously receive the uplink channel from the terminal 20.
  • the terminal 20 may perform one of the following optional operations:
  • the terminal 20 may perform an operation assuming the base station discontinuous reception. Specifically, the terminal 20 identifies the status of the base station discontinuous reception by RRC, MAC-CE, or DCI. In the case of DCI, it is assumed that the terminal 20 receives DCI indicating the status of the base station discontinuous reception from the base station 10. Details of the instruction by DCI will be described later in Example 3.
  • the terminal 20 performs uplink transmissions as scheduled or configured by the base station 10, regardless of the status of the base station intermittent reception.
  • the terminal 20 may ignore the DBR, specifically, the terminal 20 performs uplink transmissions as scheduled or configured by the base station 10, regardless of the DBR status.
  • the base station 10 may also receive terminal assistance information to determine the values of the aforementioned parameters that define the wake-up/sleep periods.
  • the terminal support information may be a period of terminal traffic.
  • the base station 10 may receive the terminal support information at a higher layer.
  • the base station 10 determines the value of the parameter taking into account the terminal support information reported by the terminal 20.
  • the terminal 20 may transmit terminal support information, such as the period of terminal traffic, to the base station 10.
  • Example 2 In this embodiment, an example of a method for triggering discontinuous reception from a base station will be described.
  • Enabling/disabling discontinuous reception from the base station may be done using one of the following options:
  • the base station 10 may enable/disable discontinuous reception at the base station when an RRC parameter indicating the enable/disable of discontinuous reception at the base station is set by the terminal 20 or another network node (e.g., a core network or another base station, etc.).
  • another network node e.g., a core network or another base station, etc.
  • the base station 10 may enable/disable discontinuous reception at the base station when it receives a MAC-CE command indicating enabling/disabling of discontinuous reception at the base station from the terminal 20 or another network node (e.g., a core network or another base station, etc.).
  • a MAC-CE command indicating enabling/disabling of discontinuous reception at the base station from the terminal 20 or another network node (e.g., a core network or another base station, etc.).
  • the base station 10 may enable/disable the discontinuous reception at the base station based on an instruction to enable/disable the discontinuous reception at the base station included in the UCI.
  • the UCI including the instruction to enable/disable the base station discontinuous reception may be a newly defined UCI type that is different from the conventional UCI.
  • the UCI may also be the same UCI type as the conventional UCI, such as HARQ-ACK, CSI, or SR.
  • the terminal 20 may transmit a PUCCH or PUSCH to the base station 10 to execute an instruction for discontinuous reception at the base station (i.e., activation/deactivation), thereby enabling/disabling discontinuous reception at the base station.
  • an instruction for discontinuous reception at the base station i.e., activation/deactivation
  • the terminal 20 may receive DCI indicating the status of the intermittent reception from the base station 10 in order to identify whether the instruction by the UCI has been correctly decoded by the base station 10 and whether there is a common understanding between the base station 10 and the terminal 20 regarding the status of the intermittent reception from the base station. Details of the DCI will be described later in Example 3.
  • the base station 10 may enable/disable the base station discontinuous reception when some condition is met.
  • the base station 10 may enable the base station discontinuous reception when the base station 10 does not receive an uplink channel from the terminal 20 for a certain period of time.
  • the certain period of time may be a symbol, a slot, a subframe, a millisecond, a second, etc.
  • the terminal 20 may receive DCI indicating the status of the intermittent reception from the base station 10 in order to obtain a common understanding of the status of the intermittent reception between the base station 10 and the terminal 20. Details of the DCI will be described later in Example 3.
  • the base station 10 may enable/disable the base station discontinuous reception by a combination of the above options.
  • the base station 10 may perform one of the following optional operations as a procedure for enabling/disabling intermittent base station reception.
  • the base station 10 may immediately enable/disable the discontinuous reception at the base station when any of the options that trigger the enablement/disablement of the discontinuous reception at the base station described above is executed.
  • the base station 10 may receive an instruction on the timing of enabling/disabling the base station discontinuous reception at a fixed time interval or a specified time after receiving the instruction.
  • the unit of the time interval or time designation may be a symbol, a slot, a subframe, milliseconds, seconds, etc.
  • the base station 10 may enable/disable the base station discontinuous reception at a specified time when any of the above-mentioned options that trigger the enabling/disabling of the base station discontinuous reception is executed.
  • the base station 10 may enable/disable the base station discontinuous reception based on a newly introduced timer.
  • the enable/disable timers may be the same or different.
  • the unit of the timer may be symbols, slots, subframes, milliseconds, seconds, etc.
  • the base station 10 or the terminal 20 or other network nodes may set the timer in RRC or specify it in MAC-CE or UCI/DCI.
  • the timer is executed.
  • the base station 10 may enable/disable the base station intermittent reception.
  • the timer Even if the base station intermittent reception is instructed to be enabled, there are cases where the actual uplink transmission from the terminal 20 occurs with a certain delay after the instruction due to the processing of the terminal 20, etc. Even in such cases, by introducing a timer, the base station intermittent reception can be enabled after a certain period of time, thereby reducing the power consumption of the base station 10.
  • Example 3 In this embodiment, an example will be described in which a terminal receives an instruction regarding discontinuous reception from a base station via DCI.
  • the terminal 20 identifies the status of discontinuous reception at the base station and the terminal 20 and the base station 10 have a common understanding of the status, it is necessary to consider a mechanism for the base station 10 to indicate the status of discontinuous reception at the base station to the terminal 20. For timely indication, indication by DCI is promising.
  • the advantage of having a common understanding is that when base station discontinuous reception is enabled, the terminal 20 can stop uplink transmission, thereby saving power consumption of the terminal 20.
  • a new RNTI may be introduced to indicate the status of the base station discontinuous reception.
  • the new RNTI may be, for example, the gNB CDRX-RNTI (GC-RNTI).
  • the introduction of the DCI field may be one of the following options:
  • a new DCI field may be introduced to indicate the status of the base station discontinuous reception.
  • the bit size of the introduced DCI field may be 1 bit, with a valid state indicated by "1” and an invalid state indicated by "0", or vice versa.
  • a new DCI field may not be introduced. That is, the status of the base station discontinuous reception may be indicated by an existing field. For example, if the corresponding DCI format is scrambled with a new RNTI such as GC-RNTI and the HPN and RV fields are all set to "0", the terminal 20 may identify that the status of the base station discontinuous reception is enabled.
  • the terminal 20 may identify that the status of discontinuous reception from the base station is disabled.
  • the corresponding DCI format may also be one of the following options:
  • ⁇ Option 1> It may be a DCI that is specific to the terminal 20.
  • the base station 10 may indicate the status of the base station discontinuous reception using a new DCI format that is different from the conventional DCI format.
  • the base station 10 may indicate the status of the base station discontinuous reception using conventional DCI formats 0_1, 0_2, 1_1, 1_2 or other DCI formats.
  • the DCI may be common to a group of terminals 20.
  • the base station 10 may indicate the status of the base station discontinuous reception by using a new DCI format different from the conventional one.
  • the aforementioned new DCI field may be introduced in the new DCI format together with other new DCI fields for the power saving technique of the base station 10.
  • the base station 10 may scramble the new DCI format with the aforementioned new RNTI (e.g., GC-RNTI).
  • the base station 10 may indicate the status of the base station discontinuous reception using the conventional DCI format 2_6 or other group-common DCI format.
  • DCI format 2_6 Assuming that DCI format 2_6 is used, conventional DCI fields in the DCI format may be reinterpreted to indicate the status of base station discontinuous reception. For example, "Wake-up indication” may be used for reinterpretation. A valid state may be indicated by “1” and an invalid state may be indicated by “0", or vice versa.
  • the base station 10 may scramble DCI format 2_6 with the new RNTI (such as GC-RNTI) mentioned above instead of the PS-RNTI.
  • the new RNTI such as GC-RNTI
  • the terminal 20 can identify the status of intermittent reception from the base station, and the terminal 20 and the base station 10 can understand it in common.
  • Example 4 In this embodiment, an example will be described in which base stations and terminals report capability information to each other regarding discontinuous reception at a base station.
  • Base station capability information indicating the capabilities of the base station 10 may be introduced. That is, the base station 10 transmits the base station capability information to the terminal 20 or other network nodes. The terminal 20 or other network nodes that receive the base station capability information may assume the capabilities of the base station 10 based on the received base station capability information.
  • the base station capability information may include information indicating whether or not the base station supports discontinuous reception.
  • base station capability information indicating whether or not a DCI indication indicating the status of discontinuous reception of the base station is supported may be introduced.
  • terminal capability information may also be introduced. For example, terminal capability information indicating whether or not the base station discontinuous reception is supported may be introduced. Also, terminal capability information indicating whether or not the base station discontinuous reception status identification may be introduced.
  • the terminal 20 may identify whether the intermittent reception function at the base station is enabled or disabled. For example, the terminal 20 may perform the operation of option 1 shown in the first embodiment. Also, if the terminal 20 does not have a terminal capability that supports identifying the status of intermittent reception at the base station, the terminal 20 may perform the operation of option 2 shown in the first embodiment.
  • terminal capability information indicating whether or not a DCI indication indicating the status of discontinuous reception at a base station is supported may be introduced.
  • terminal capability information indicating whether or not a new terminal-specific/group-common DCI format is supported may be introduced.
  • the dependency between base station capability information and terminal capability information may be one of the following options:
  • both the base station capability information and the terminal capability information indicating that the base station discontinuous reception is supported may need to be reported.
  • ⁇ Option 2> In order to apply the base station discontinuous reception, it may be sufficient to report only either the base station capability information or the terminal capability information indicating that the base station discontinuous reception is supported.
  • base stations and terminals can report capability information to each other regarding intermittent reception at the base station.
  • the terminal capabilities in each of the above-described embodiments may be limited to cases where the terminal 20 is a reduced-function terminal, or may be applied even when the terminal 20 is not a reduced-function terminal.
  • cell DTX/DRX is being considered to reduce power consumption in the base station 10.
  • alignment of cell DTX/DRX with UE-DRX in the RRC connected mode, information exchange between nodes regarding cell DTX/DRX, etc. are being considered.
  • the mechanism for enabling or disabling the transmission/reception units of the base station 10 is important in reducing power consumption in the base station 10. To reduce power consumption in the base station 10, the adaptation of DL transmission and UL reception is being considered.
  • Cell DTX/DRX is useful for achieving adaptation of DL transmission and UL reception.
  • the details of the operation of cell DTX/DRX have not been clear. Therefore, below, examples 5 to 8 are explained as specific examples of cell DTX/DRX.
  • Cell DRX may be defined as in the first to fourth embodiments. Whether or not cell DRX is performed is determined by higher layer parameters, and a period, a start slot, an offset, and a period may be set. In addition, whether or not cell DRX is applicable may be determined by a semi-static, dynamic, or flexible network state.
  • Cell DTX may be defined as described below. Whether or not to perform cell DTX is determined by higher layer parameters, and the period, start slot, offset and duration may be further set. Also, the applicability of cell DTX may be determined by semi-static, dynamic or flexible network conditions.
  • ⁇ Option 1> 6 is a diagram for explaining the intermittent transmission of the base station according to the fifth embodiment of the present invention. As shown in FIG. 6, a period during which the base station 10 disables or enables its own transmission unit may be introduced as a cell DTX.
  • the transmission units and/or parameters that are disabled may be per port, per panel, per beam, per carrier, or per cell.
  • the cell DTX may be defined by some or all of the parameters shown in 1)-6) below.
  • the units of the parameters may be symbols, slots, subframes, milliseconds, seconds, etc., or other units.
  • the units of the parameters may be the same or different.
  • dtx-onDurationTimer The period from the beginning of the DTX cycle.
  • dtx-SlotOffset The delay period before starting the dtx-onDurationTimer.
  • dtx-InactivityTimer A period that starts after a DL transmission opportunity (an opportunity for the base station 10 to perform DL transmission and for the terminal 20 to receive DL transmission).
  • dtx-LongCycleStartOffset dtx-StartOffset that defines the long DTX cycle (i.e., dtx-LongCycle) and the start of the long and short DTX cycles.
  • dtx-ShortCycle Short DTX cycle, may be optional.
  • dtx-ShortCycleTimer The period during which the base station 10 performs a short DTX cycle. When DL reception occurs during long DTX, short DTX is started. It may be optional.
  • FIG. 7 is a diagram for explaining each parameter according to the fifth embodiment of the present invention.
  • the active time is dtx-onDurationTimer after dtx-SlotOffset from the beginning of dtx-LongCycle. If DL reception occurs during drx-LonCycle, the active time ends dtx-InactivityTimer after DL reception occurs, and dtx-ShortCycle starts. If DL reception occurs during dtx-ShortCycleTimer, dtx-ShortCycle continues. If no DL reception occurs during dtx-ShortCycleTimer, dtx-LongCycle starts.
  • the base station 10 may transmit a DL channel or a DL signal while the dtx-onDurationTimer or the dtx-InactivityTimer is operating.
  • the terminal 20 may receive a DL channel or a DL signal while the dtx-onDurationTimer or the dtx-InactivityTimer is operating.
  • the terminal 20 may be assumed to receive a DL channel or a DL signal when the dtx-onDurationTimer or the dtx-InactivityTimer is not operating.
  • the terminal 20 may assume that it receives DL channels or DL signals as notified or configured by the base station 10.
  • the DL channel or DL signal may be any of the following: PDCCH, PDSCH, SPS (Semi Persistent Scheduling)-PDSCH, CSI-RS (Channel State Information - Reference Signal), PT-RS (Phase Tracking - Reference Signal), or DM-RS (Demodulation - Reference Signal).
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Control Channel
  • SPS Semi Persistent Scheduling
  • CSI-RS Channel State Information - Reference Signal
  • PT-RS Phase Tracking - Reference Signal
  • DM-RS Demodulation - Reference Signal
  • the UL channel or UL signal may be any of PRACH, PUCCH, PUSCH, CG-PUSCH, SRS, PT-RS, and DM-RS.
  • Example 6 In the sixth embodiment, the cell DTX/DRX setting will be described.
  • ⁇ Option 1> Joint configuration may be performed.
  • Cell DTX and cell DRX may be jointly configured by a common parameter.
  • the common parameter e.g., CellDTXDRX-Config
  • cell DTX and DRX may be enabled.
  • the terminal 20 may appropriately perform the operation of the fifth embodiment.
  • the common parameters may include either or both of the information elements 1) and 2) shown below.
  • Parameters common to DTX and DRX Some parameters may be common to DTX and DRX. For example, a parameter indicating an on-duration timer may be common to DTX and DRX. For example, a parameter indicating a cycle may be common to DTX and DRX.
  • Parameters that are separated for DTX and DRX Some parameters may be set separately for DTX and DRX. For example, a parameter indicating a slot offset may be set separately for DTX and DRX.
  • Option 1 can reduce the RRC signaling overhead.
  • Cell DTX and cell DRX may be individually configured by separate parameters.
  • a parameter for DTX e.g., CellDTX-Config
  • cell DTX may be enabled.
  • a parameter for DRX e.g., CellDRX-Config
  • cell DRX may be enabled.
  • the parameter for DTX may include the parameters described in the fifth embodiment.
  • the parameter for DRX may include the parameters described in the first embodiment.
  • Option 2 provides greater configuration flexibility when enabling either Cell DTX or Cell DRX.
  • Example 7 In Example 7, the enabling or disabling of cell DTX/DRX will be described.
  • cell DTX and cell DRX are jointly configured (option 1 in Example 6), cell DTX and cell DRX may be enabled or disabled as follows:
  • the cell DTX and cell DRX may be enabled or disabled by RRC signaling.
  • RRC parameter may be a common parameter (e.g., CellDTXDRX-Config) in the sixth embodiment.
  • the cell DTX and cell DRX may be enabled or disabled by the MAC-CE.
  • the cell DTX and cell DRX may be enabled or disabled.
  • the cell DTX and cell DRX may be enabled or disabled by the DCI.
  • the terminal 20 may be dynamically notified that the cell DTX and cell DRX are enabled or disabled by the DCI.
  • the notification by the DCI may be performed as shown in 1)-4) below.
  • the DCI format may be a UE-specific DCI format or a group-common DCI format.
  • the DCI format may be an existing format (e.g., DCI format 1_1, 1_2, 2_0) or may be newly defined (e.g., 1_x, 2_x).
  • the RNTI may be an existing RNTI (e.g., C-RNTI, SFI-RNTI), or a new RNTI may be defined.
  • the DCI fields may be a set of existing fields and/or new fields. For example, if it is a set of existing fields, some fields may be used to enable or disable cell DTX and cell DRX, as shown in Alt. 1) and Alt. 2) below.
  • Alt. 1 When scrambling is performed by an existing RNTI such as a CS-RNTI, and, for example, when HPN is set to all "0", RV is set to all "00", and TDRA is set to all "1", the terminal 20 may dynamically enable cell DTX and cell DRX. Also, for example, when HPN is set to all "0”, RV is set to all "00", MCS is set to all “1”, FDRA is set to all "1”, and TDRA is set to all "1", the terminal 20 may dynamically disable cell DTX and cell DRX.
  • an existing RNTI such as a CS-RNTI
  • Alt. 2 When scrambling with a new RNTI and, for example, when HPN is set to all “0” and RV is set to all "00", the terminal 20 may dynamically enable cell DTX and cell DRX. Also, for example, when HPN is set to all "0”, RV is set to all "00", MCS is set to all "1”, and FDRA is set to all "1", the terminal 20 may dynamically disable cell DTX and cell DRX.
  • the cell DTX and cell DRX may be enabled or disabled by the new DCI field.
  • the new DCI field may be called a "cell DTX DRX identifier."
  • the terminal 20 may dynamically enable the cell DTX and cell DRX.
  • the terminal 20 may dynamically disable the cell DTX and cell DRX.
  • the DCI including the new DCI field may be scrambled with either an existing RNTI or a new RNTI.
  • cell DTX and cell DRX may be enabled or disabled as follows:
  • the cell DTX or cell DRX may be enabled or disabled by RRC signaling.
  • RRC parameter may be a separate parameter (e.g., CellDTX-Config, CellDRX-Config) in the sixth embodiment.
  • the cell DTX or cell DRX may be enabled or disabled by the MAC-CE.
  • the cell DTX or cell DRX may be enabled or disabled.
  • the terminal 20 may be dynamically notified that the cell DTX or cell DRX is enabled or disabled by the DCI.
  • the notification by the DCI may be performed as shown in 1)-4) below.
  • the DCI format may be a UE-specific DCI format or a group-common DCI format.
  • the DCI format may be an existing format (e.g., DCI format 1_1, 1_2, 2_0) or may be newly defined (e.g., 1_x, 2_x).
  • the RNTI may be an existing RNTI (e.g., C-RNTI, SFI-RNTI), or a new RNTI may be defined.
  • the DCI fields may be a set of existing fields and/or new fields. For example, a different set of DCI fields may be used to enable or disable cell DTX or cell DRX, respectively, to indicate either cell DTX or cell DRX. For example, in the case of an existing set of fields, some fields may be used to enable or disable cell DTX and cell DRX, as shown in Alt. 1) and Alt. 2) below.
  • Alt. 1 When scrambling is performed by an existing RNTI such as CS-RNTI, and, for example, HPN is set to all "0", RV is set to all "00", and PRI is set to all “1", the terminal 20 may dynamically enable cell DTX. Also, for example, HPN is set to all "0”, RV is set to all "00”, MCS is set to all “1”, FDRA is set to all "1”, and PRI is set to all “1", the terminal 20 may dynamically disable cell DTX. Also, for example, HPN is set to all "0", RV is set to all "00", and TDRA is set to all "1", the terminal 20 may dynamically enable cell DRX.
  • HPN is set to all "0
  • RV is set to all "00
  • TDRA is set to all "1
  • the terminal 20 may dynamically enable cell DRX.
  • HPN is set to all “0”
  • RV is set to all “00”
  • MCS is set to all “1”
  • FDRA is set to all "1”
  • TDRA is set to all "1”
  • the terminal 20 may dynamically disable cell DRX.
  • the PRI and TDRA fields may additionally be used to indicate whether the DCI to be enabled or disabled is for CG-PUSCH/SPS-PDSCH or cell DTX/cell DRX.
  • the same fields may be used to indicate whether the target is CG-PUSCH/SPS-PDSCH or cell DTX/cell DRX.
  • the DCI format may indicate whether the target is cell DTX or cell DRX.
  • DCI format 0_0 may enable or disable cell DRX
  • DCI format 1_0 may enable or disable cell DTX.
  • DCI format may indicate whether cell DTX or cell DRX is targeted.
  • DCI format 0_0 may enable or disable cell DRX
  • DCI format 1_0 may enable or disable cell DTX.
  • the new DCI field may enable or disable cell DTX or cell DRX.
  • the new DCI field may be referred to as a "Cell DTX identifier" or a "Cell DRX identifier.”
  • the terminal 20 may dynamically enable cell DTX. Also, for example, if the cell DTX identifier is set to "0", the terminal 20 may dynamically disable cell DTX. For example, if the cell DRX identifier is set to "1", the terminal 20 may dynamically enable cell DRX. Also, for example, if the cell DRX identifier is set to "0", the terminal 20 may dynamically disable cell DRX.
  • the new DCI field may also be called a "Cell DTX DRX identifier."
  • the terminal 20 may dynamically enable the Cell DTX or may dynamically disable the Cell DRX.
  • the terminal 20 may dynamically enable the Cell DRX or may dynamically disable the Cell DTX.
  • the terminal 20 may dynamically enable the Cell DTX and the Cell DRX.
  • the terminal 20 may dynamically enable the Cell DTX and the Cell DRX.
  • the bit mapping of the Cell DTX and the Cell DRX described above may be reversed.
  • the DCI containing the new DCI field may be scrambled with either the existing RNTI or the new RNTI.
  • the timing for applying the enabling or disabling of cell DTX or cell DRX notified by MAC-CE or DCI described above may be 1) or 2) as shown below.
  • the terminal 20 may immediately activate or deactivate. When activation or deactivation of cell DTX or cell DRX is notified by MAC-CE or DCI, the terminal 20 may immediately activate or deactivate cell DTX or cell DRX.
  • the terminal 20 may enable or disable at the notified time.
  • the time to enable or disable the cell DTX or cell DRX may be notified via RRC signaling, MAC-CE, or DCI as an interval or a certain time from the time when the enablement or disablement is notified.
  • the unit of time may be a symbol, slot, subframe, millisecond, second, etc.
  • Example 8 In the eighth embodiment, the related operation between the cell DTX/DRX and the UE DRX will be described. If the time positions of the cell DTX and the UE DRX are not aligned, the terminal 20 may wake up to receive a DL channel or a DL signal when no DL transmission is being performed due to the cell DTX.
  • UE DRX is configured (eg, DRX-Config)
  • the terminal 20 may not assume that cell DTX is configured.
  • UE DRX e.g., DRX-Config
  • the parameters of cell DTX may be the parameters described in the sixth embodiment.
  • the terminal 20 does not need to assume that a cell DTX that does not coincide with the time position of the UE DRX is configured.
  • the cell DTX and the UE DRX are time-aligned, the cell DTX and the UE DRX may be configured jointly.
  • the terminal 20 does not need to assume that the UE DRX (e.g., DRX-Config) that does not coincide with the time position of the cell DTX is configured.
  • the cell DTX and the UE DRX are time-aligned, the cell DTX and the UE DRX may be configured jointly.
  • the cell DTX and the UE DRX may be configured in the terminal 20 regardless of whether the time positions of the cell DTX and the UE DRX are aligned or not. Also, when the cell DTX is configured in addition to the UE DRX, the parameters of the cell DTX may take precedence. The terminal 20 may ignore the parameters of the UE DRX. The terminal 20 may operate as in the fifth embodiment. Also, when the cell DTX is configured in addition to the UE DRX, the parameters of both may be applied. The terminal 20 may wake up in the active times of both the cell DTX and the cell DRX.
  • cell DTX and UE DRX are aligned in time may be defined as option 1 or option 2 shown below.
  • the time positions of the cell DTX and the UE DRX may be defined as being aligned regardless of the active time in the long cycle.
  • the long cycle of the cell DTX e.g., dtx-LongCycle
  • the long cycle of the UE DRX e.g., drx-LongCycle
  • the long cycle is the same for the cell DTX and the UE DRX, it may be further defined that the cell DTX and the UE DRX are aligned in time depending on the active time in the long cycle.
  • the on-duration timers and slot offsets in the long cycle e.g., dtx-LongCycle, drx-LongCycle, dtx-onDurationTimer, drx-onDurationTimer, dtx-SlotOffset, drx-SlotOffset
  • the cell DTX and the UE DRX are aligned in time.
  • other parameters e.g., dtx-InactivityTimer, drx-InactivityTimer, etc. may be additionally considered to determine whether the definition is met.
  • the cell DTX and the UE DRX may be defined as being time-aligned.
  • Option 2 may be applied when the conditions of Option 1-1 or Option 1-2 are met.
  • the time positions of the cell DTX and the UE DRX may be defined as being aligned regardless of the active time in the short cycle.
  • the short cycle of the cell DTX e.g., dtx-ShortCycle
  • the short cycle of the UE DRX e.g., drx-ShortCycle
  • the short cycle is the same for the cell DTX and the UE DRX, it may be further defined that the cell DTX and the UE DRX are time-aligned depending on the active time within the short cycle.
  • short cycle timers short cycles (e.g. dtx-ShortCycleTimer, drx-ShortCycleTimer, dtx-ShortCycle, drx-ShortCycle) are the same for the cell DTX and the UE DRX, it may be defined that the cell DTX and the UE DRX are time-aligned.
  • the UE may determine whether to monitor or receive a PDCCH that notifies the UE of dynamically enabling or disabling the cell DTX/DRX.
  • the UE monitoring or receiving a PDCCH from the base station 10 may be replaced with the base station 10 transmitting a PDCCH to the UE.
  • the UE may be expected to monitor or receive a PDCCH during cell DTX inactivity periods that indicates to dynamically enable or disable cell DTX/DRX.
  • the UE may or may not expect to monitor or receive PDCCHs other than the PDCCH informing dynamic enabling or disabling of cell DTX/DRX during cell DTX inactive periods.
  • Whether a certain PDCCH notifies to dynamically enable or disable cell DTX/DRX may be determined as shown in 1) or 2) below.
  • the UE may determine that the PDCCH notifies the dynamic enabling or disabling of cell DTX/DRX.
  • the UE may determine that the PDCCH notifies the dynamic enabling or disabling of cell DTX/DRX.
  • the UE may not be expected to monitor or receive a PDCCH informing of dynamically enabling or disabling cell DTX/DRX during cell DTX inactive periods.
  • the UE may or may not expect to monitor or receive PDCCHs other than the PDCCH informing dynamic enabling or disabling of cell DTX/DRX during cell DTX inactive periods.
  • Whether a certain PDCCH notifies to dynamically enable or disable cell DTX/DRX may be determined as shown in 1) or 2) below.
  • the UE may determine that the PDCCH notifies the dynamic enabling or disabling of cell DTX/DRX.
  • the UE may determine that the PDCCH notifies the dynamic enabling or disabling of cell DTX/DRX.
  • ⁇ Option 3> 8 is a flowchart for explaining an example of cell DTX according to Example 9 of the embodiment of the present invention.
  • the UE sets by an upper layer parameter whether or not the UE expects to monitor or receive a PDCCH notifying that the cell DTX/DRX is dynamically enabled or disabled during the inactive period of the cell DTX.
  • step S12 it is determined whether or not the UE expects to monitor or receive the PDCCH during the inactive period of the cell DTX.
  • step S12 If the UE expects to monitor or receive the PDCCH during the inactive period of the cell DTX (YES in S12), the process proceeds to step S13, and if the UE does not expect to monitor or receive the PDCCH during the inactive period of the cell DTX (NO in S12), the process proceeds to step S14.
  • step S13 the UE monitors or receives the PDCCH during the inactive period of the cell DTX.
  • step S14 the UE does not monitor or receive the PDCCH during the inactive period of the cell DTX.
  • UE capabilities may or may not be defined to support switching whether the UE expects to receive a PDCCH informing of dynamically enabling or disabling cell DTX/DRX during periods of cell DTX inactivity.
  • the base station 10 may configure whether the UE expects to receive a PDCCH informing it to dynamically enable or disable cell DTX/DRX during cell DTX inactive periods.
  • the base station 10 is configured to allow the UE to receive a PDCCH notifying that cell DTX/DRX will be dynamically enabled or disabled during a cell DTX inactive period, it is assumed that the UE will receive a PDCCH notifying that cell DTX/DRX will be dynamically enabled or disabled during a cell DTX inactive period.
  • the base station 10 is configured not to allow the UE to receive a PDCCH notifying that the cell DTX/DRX is dynamically enabled or disabled during a cell DTX inactive period, the UE is not expected to receive a PDCCH notifying that the cell DTX/DRX is dynamically enabled or disabled during a cell DTX inactive period.
  • the UE may operate as shown below in 1) or 2).
  • the UE receives a PDCCH indicating to dynamically enable or disable cell DTX/DRX during a cell DTX inactive period. 2) The UE is not expected to receive a PDCCH informing of dynamically enabling or disabling cell DTX/DRX during the cell DTX inactive period.
  • the switch as to whether the UE expects to receive a PDCCH notifying dynamic activation or deactivation of cell DTX/DRX during cell DTX inactivity may be set by one common parameter or by separate parameters for each cell DTX setting.
  • Which of the above embodiments is used may be set by higher layer parameters, may be reported from the terminal 20 to the base station 10 as UE capabilities, may be specified by specifications, or may be reported from the terminal 20 to the base station 10 as UE capabilities and set by higher layer parameters.
  • a WUS (Wake up signal) for the base station may be used for cell DTX in addition to cell DRX.
  • a UE capability may be defined indicating whether or not cell DTX and cell DRX are supported.
  • a UE capability may be defined indicating whether or not cell DTX and dynamic enabling or disabling of cell DRX are supported.
  • a UE capability may be defined indicating whether or not cell DTX and cell DRX with UE DRX or CDRX are supported.
  • cell DTX/DRX may be replaced with cell DTX and/or cell DRX.
  • Activation/deactivation may be replaced with activation and/or deactivation.
  • the above-described embodiment provides a technique for dynamically enabling or disabling intermittent transmission and reception at a base station.
  • the base station 10 and the terminal 20 include functions to execute the above-mentioned embodiments. However, the base station 10 and the terminal 20 may each include only the functions proposed in any of the embodiments.
  • Fig. 9 is a diagram showing an example of the functional configuration of a base station.
  • the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140.
  • the functional configuration shown in Fig. 9 is merely an example. As long as the operation related to the embodiment of the present invention can be executed, the names of the functional divisions and the functional units may be any.
  • the transmitting unit 110 and the receiving unit 120 may be called a communication unit.
  • the transmitting unit 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly.
  • the receiving unit 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signal.
  • the transmitting unit 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, DL data, etc. to the terminal 20.
  • the transmitting unit 110 also transmits the setting information, etc., described in the embodiment.
  • the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in a storage device, and reads it out from the storage device as necessary.
  • the control unit 140 performs control of the entire base station 10, including control related to signal transmission and reception, for example.
  • the functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120.
  • the transmitting unit 110 and the receiving unit 120 may be called the transmitter and the receiver, respectively.
  • Fig. 10 is a diagram showing an example of the functional configuration of a terminal.
  • the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240.
  • the functional configuration shown in Fig. 10 is merely an example. As long as the operation related to the embodiment of the present invention can be executed, the names of the functional divisions and the functional units may be any.
  • the transmitting unit 210 and the receiving unit 220 may be called a communication unit.
  • the transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly.
  • the receiver 220 receives various signals wirelessly and obtains higher layer signals from the received physical layer signals.
  • the transmitter 210 also transmits HARQ-ACK, and the receiver 220 receives the setting information etc. described in the embodiment.
  • the setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 in a storage device, and reads it out from the storage device as necessary.
  • the setting unit 230 also stores setting information that is set in advance.
  • the control unit 240 performs control of the entire terminal 20, including control related to signal transmission and reception. Note that the functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.
  • the transmitting unit 210 and the receiving unit 220 may also be called a transmitter and a receiver, respectively.
  • the terminal or base station of this embodiment may be configured as a terminal or base station as shown in each of the following items.
  • the following communication method may be implemented.
  • a control unit that assumes that the base station performs an intermittent transmission function that enables or disables a transmission unit; A communication unit that performs reception from the base station based on the assumed intermittent transmission function; A receiving unit that receives control information related to the intermittent transmission function from the base station, The control unit determines whether to assume that the terminal will receive a physical downlink control channel from the base station notifying the terminal that at least one of cell discontinuous transmission and cell discontinuous reception will be dynamically enabled or disabled during an inactive period in the discontinuous transmission function. (Section 2) 2. The terminal according to claim 1, wherein the control unit assumes that the physical downlink channel is received from the base station during an inactive period in the discontinuous transmission function. (Section 3) 2.
  • control unit does not assume that the physical downlink channel is received from the base station during an inactive period in the discontinuous transmission function.
  • (Section 4) 2.
  • control unit does not assume that the physical downlink channel is received from the base station during an inactive period in the discontinuous transmission function.
  • a control unit that executes an intermittent transmission function to enable or disable a transmission unit; A communication unit that executes transmission to a terminal based on the intermittent transmission function; A transmission unit that transmits control information related to the intermittent transmission function to the terminal, The control unit is a base station that decides whether to transmit a physical downlink control channel to the terminal, notifying the terminal of dynamically enabling or disabling at least one of discontinuous cell transmission and discontinuous cell reception during an inactive period in the discontinuous transmission function.
  • the base station performs a discontinuous transmission function for enabling or disabling a transmission unit; performing reception from the base station based on the assumed intermittent transmission function; receiving control information relating to the discontinuous transmission function from the base station; and a procedure for determining whether or not to assume that a physical downlink control channel notifying that at least one of discontinuous cell transmission and discontinuous cell reception will be dynamically enabled or disabled during an inactive period in the discontinuous transmission function.
  • any of the above configurations provide a technique for dynamically enabling or disabling the intermittent transmission/reception of a base station. According to paragraphs 2 to 4, during an inactive period of intermittent transmission, it is possible to determine whether or not to receive a PDCCH that dynamically enables or disables the intermittent transmission/reception of a base station.
  • each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices.
  • the functional blocks may be realized by combining the one device or the multiple devices with software.
  • Functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
  • a functional block (component) that performs the transmission function is called a transmitting unit or transmitter.
  • the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 11 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 in one embodiment of the present disclosure.
  • the above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.
  • the term "apparatus" can be interpreted as a circuit, device, unit, etc.
  • the hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.
  • the functions of the base station 10 and the terminal 20 are realized by loading specific software (programs) onto hardware such as the processor 1001 and the storage device 1002, causing the processor 1001 to perform calculations, control communications by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
  • the processor 1001 for example, operates an operating system to control the entire computer.
  • the processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, etc.
  • CPU central processing unit
  • control unit 140, control unit 240, etc. may be realized by the processor 1001.
  • the processor 1001 reads out a program (program code), software module, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to the program.
  • the program is a program that causes a computer to execute at least a part of the operations described in the above-mentioned embodiment.
  • the control unit 140 of the base station 10 shown in FIG. 9 may be stored in the storage device 1002 and realized by a control program that runs on the processor 1001.
  • the control unit 240 of the terminal 20 shown in FIG. 10 may be stored in the storage device 1002 and realized by a control program that runs on the processor 1001.
  • the processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from a network via a telecommunication line.
  • the storage device 1002 is a computer-readable recording medium and may be composed of, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), etc.
  • the storage device 1002 may also be called a register, a cache, a main memory, etc.
  • the storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method relating to one embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc.
  • the above-mentioned storage medium may be, for example, a database, a server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.
  • the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc.
  • the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to realize at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmitting/receiving antenna, an amplifier unit, a transmitting/receiving unit, a transmission path interface, etc. may be realized by the communication device 1004.
  • the transmitting/receiving unit may be implemented as a transmitting unit or a receiving unit that is physically or logically separated.
  • the input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).
  • each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses between each device.
  • the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware.
  • the processor 1001 may be implemented using at least one of these pieces of hardware.
  • FIG. 12 shows an example configuration of a vehicle 2001.
  • the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013.
  • a communication device mounted on the vehicle 2001 and may be applied to the communication module 2013, for example.
  • the drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.
  • the steering unit 2003 includes at least a steering wheel (also called a handlebar), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.
  • the electronic control unit 2010 is composed of a microprocessor 2031, memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001.
  • the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
  • Signals from the various sensors 2021-2029 include a current signal from a current sensor 2021 that senses the motor current, a front and rear wheel rotation speed signal obtained by a rotation speed sensor 2022, a front and rear wheel air pressure signal obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.
  • the information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices.
  • the information service unit 2012 uses information acquired from external devices via the communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.
  • the driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as a millimeter wave radar, LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high definition (HD) maps, autonomous vehicle (AV) maps, etc.), a gyro system (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chip, and AI processor, as well as one or more ECUs that control these devices.
  • the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize driving assistance functions or autonomous driving functions.
  • the communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port.
  • the communication module 2013 transmits and receives data via the communication port 2033 between the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.
  • the communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication.
  • the communication module 2013 may be located either inside or outside the electronic control unit 2010.
  • the external device may be, for example, a base station, a mobile station, etc.
  • the communication module 2013 transmits the current signal from the current sensor input to the electronic control unit 2010 to an external device via wireless communication.
  • the communication module 2013 also transmits to the external device via wireless communication the following signals input to the electronic control unit 2010: the rotation speed signal of the front and rear wheels acquired by the rotation speed sensor 2022, the air pressure signal of the front and rear wheels acquired by the air pressure sensor 2023, the vehicle speed signal acquired by the vehicle speed sensor 2024, the acceleration signal acquired by the acceleration sensor 2025, the accelerator pedal depression amount signal acquired by the accelerator pedal sensor 2029, the brake pedal depression amount signal acquired by the brake pedal sensor 2026, the shift lever operation signal acquired by the shift lever sensor 2027, and the detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 2028.
  • the communication module 2013 receives various information (traffic information, signal information, vehicle distance information, etc.) transmitted from an external device, and displays it on the information service unit 2012 provided in the vehicle 2001.
  • the communication module 2013 also stores the various information received from the external device in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.
  • the operations of multiple functional units may be physically performed by one part, or the operations of one functional unit may be physically performed by multiple parts.
  • the order of the processing procedures described in the embodiment may be changed as long as there is no contradiction.
  • the base station 10 and the terminal 20 have been described using functional block diagrams, but such devices may be realized by hardware, software, or a combination thereof.
  • the software operated by the processor possessed by the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor possessed by the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
  • the notification of information is not limited to the aspects/embodiments described in the present disclosure and may be performed using other methods.
  • the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination of these.
  • RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
  • Each aspect/embodiment described in this disclosure is a mobile communication system that is compatible with LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or decimal number)), FRA (Future Ra).
  • the present invention may be applied to at least one of systems using IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other appropriate systems, and next-generation systems that are expanded, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.).
  • certain operations that are described as being performed by the base station 10 may in some cases be performed by its upper node.
  • various operations performed for communication with a terminal 20 may be performed by at least one of the base station 10 and other network nodes other than the base station 10 (such as, but not limited to, an MME or S-GW).
  • the base station 10 may be a combination of multiple other network nodes (such as an MME and an S-GW).
  • the information or signals described in this disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). They may be input and output via multiple network nodes.
  • the input and output information may be stored in a specific location (e.g., memory) or may be managed using a management table.
  • the input and output information may be overwritten, updated, or added to.
  • the output information may be deleted.
  • the input information may be sent to another device.
  • the determination in this disclosure may be based on a value represented by one bit (0 or 1), a Boolean (true or false) value, or a comparison of numerical values (e.g., a comparison with a predetermined value).
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • Software, instructions, information, etc. may also be transmitted and received via a transmission medium.
  • a transmission medium For example, if the software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.
  • wired technologies such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)
  • wireless technologies such as infrared, microwave
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.
  • At least one of the channel and the symbol may be a signal (signaling).
  • the signal may be a message.
  • a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.
  • system and “network” are used interchangeably.
  • radio resources may be indicated by an index.
  • the names used for the parameters described above are not intended to be limiting in any way. Furthermore, the formulas etc. using these parameters may differ from those explicitly disclosed in this disclosure.
  • the various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.
  • base station BS
  • radio base station base station
  • base station fixed station
  • NodeB eNodeB
  • gNodeB gNodeB
  • access point e.g., "transmission point”
  • gNodeB gNodeB
  • a base station may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.
  • a base station can accommodate one or more (e.g., three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)).
  • RRH Remote Radio Head
  • the term "cell” or “sector” refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.
  • MS Mobile Station
  • UE User Equipment
  • a mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc.
  • At least one of the base station and the mobile station may be a device mounted on a moving object, or the moving object itself.
  • the moving object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned).
  • At least one of the base station and the mobile station may include a device that does not necessarily move during communication operations.
  • at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read as a user terminal.
  • each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)).
  • the terminal 20 may be configured to have the functions of the base station 10 described above.
  • terms such as "uplink” and "downlink” may be read as terms corresponding to terminal-to-terminal communication (for example, "side").
  • the uplink channel, downlink channel, etc. may be read as a side channel.
  • the user terminal in this disclosure may be interpreted as a base station.
  • the base station may be configured to have the functions of the user terminal described above.
  • determining may encompass a wide variety of actions.
  • Determining and “determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., searching in a table, database, or other data structure), and considering ascertaining as “judging” or “determining.”
  • determining and “determining” may include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and considering ascertaining as “judging” or “determining.”
  • judgment” and “decision” can include considering resolving, selecting, choosing, establishing, comparing, etc., to have been “judged” or “decided.” In other words, “judgment” and “decision” can include considering some action to have been “judged” or “decided.” Additionally, “judgment (decision)” can be interpreted as “assuming,” “ex
  • connection refers to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
  • the coupling or connection between elements may be physical, logical, or a combination thereof.
  • “connected” may be read as "access.”
  • two elements may be considered to be “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.
  • the reference signal may also be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.
  • the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to an element using a designation such as "first,” “second,” etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.
  • a radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.
  • Numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
  • SCS subcarrier spacing
  • TTI transmission time interval
  • radio frame structure a specific filtering process performed by the transceiver in the frequency domain
  • a specific windowing process performed by the transceiver in the time domain etc.
  • a slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.).
  • a slot may be a time unit based on numerology.
  • a slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A.
  • a PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.
  • Radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals. Radio frame, subframe, slot, minislot, and symbol may each be referred to by a different name that corresponds to the radio frame, subframe, slot, minislot, and symbol.
  • one subframe may be called a Transmission Time Interval (TTI)
  • TTI Transmission Time Interval
  • multiple consecutive subframes may be called a TTI
  • one slot or one minislot may be called a TTI.
  • at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
  • the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.
  • TTI refers to, for example, the smallest time unit for scheduling in wireless communication.
  • a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units.
  • wireless resources such as frequency bandwidth and transmission power that can be used by each terminal 20
  • TTI is not limited to this.
  • the TTI may be a transmission time unit for a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc.
  • the time interval e.g., the number of symbols
  • the time interval in which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit of scheduling.
  • the number of slots (minislots) that constitute the minimum time unit of scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
  • TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, minislot, subslot, slot, etc.
  • a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms
  • a short TTI e.g., a shortened TTI, etc.
  • TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
  • the number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12.
  • the number of subcarriers included in an RB may be determined based on the numerology.
  • the time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length.
  • One TTI, one subframe, etc. may each be composed of one or more resource blocks.
  • one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.
  • PRB physical resource block
  • SCG sub-carrier group
  • REG resource element group
  • PRB pair an RB pair, etc.
  • a resource block may be composed of one or more resource elements (REs).
  • REs resource elements
  • one RE may be a radio resource area of one subcarrier and one symbol.
  • a bandwidth part which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by an index of the RB relative to a common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within the BWP.
  • the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
  • UL BWP UL BWP
  • DL BWP DL BWP
  • One or more BWPs may be configured within one carrier for the terminal 20.
  • At least one of the configured BWPs may be active, and the terminal 20 may not be expected to transmit or receive a specific signal/channel outside the active BWP.
  • BWP bit stream
  • radio frames, subframes, slots, minislots, and symbols are merely examples.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
  • a and B are different may mean “A and B are different from each other.”
  • the term may also mean “A and B are each different from C.”
  • Terms such as “separate” and “combined” may also be interpreted in the same way as “different.”
  • notification of specific information is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the specific information).
  • Base station 110 Transmitter 120 Receiver 130 Setting unit 140 Control unit 20 Terminal 210 Transmitter 220 Receiver 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Front wheel 2008 Rear wheel 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 Rotational speed sensor 2023 Air pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driving assistance system unit 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port (IO port)

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  • Engineering & Computer Science (AREA)
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  • Signal Processing (AREA)
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PCT/JP2024/016157 2023-04-26 2024-04-24 端末、基地局及び通信方法 Ceased WO2024225349A1 (ja)

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