WO2025009181A1 - 端末及び給電方法 - Google Patents
端末及び給電方法 Download PDFInfo
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- WO2025009181A1 WO2025009181A1 PCT/JP2023/025205 JP2023025205W WO2025009181A1 WO 2025009181 A1 WO2025009181 A1 WO 2025009181A1 JP 2023025205 W JP2023025205 W JP 2023025205W WO 2025009181 A1 WO2025009181 A1 WO 2025009181A1
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- Prior art keywords
- power supply
- terminal
- communication
- information
- signal
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/18—Interfaces between hierarchically similar devices between terminal devices
Definitions
- the present invention relates to a terminal and a power supply 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).
- LTE and NR define UE categories or UE capabilities for the Internet of Things (IoT) that reduce functions that are mandatory for normal terminals, such as functions related to transmission and reception bandwidth and number of antennas.
- IoT Internet of Things
- LTE defines eMTC (enhanced Machine Type Communication) and NB-IoT (Narrow Band IoT), while NR defines RedCap (Reduced Capability), etc.
- 3GPP registered trademark
- 3GPP is also studying the specifications for ultra-low power terminals that are assumed to be powered by the surrounding environment, such as sunlight, wind, water, electromagnetism, heat, sound, vibration, etc., or wirelessly (for example, non-patent document 2).
- the present invention has been made in consideration of the above points, and aims to enable a terminal to perform wireless power supply in a wireless communication system.
- a terminal has a communication unit that receives a discovery signal from a first terminal or transmits a discovery signal to the first terminal, the communication unit transmits a signal requesting power supply to the first terminal, the communication unit receives information from the first terminal indicating a first resource to be used for power supply, and has a power receiving unit that receives power supply from the first terminal in the first resource.
- the disclosed technology allows a terminal to perform wireless power supply in a wireless communication system.
- FIG. 1 is a diagram illustrating an example of the configuration of a wireless communication system.
- FIG. 1 is a diagram showing a configuration example (1) of wireless power supply according to an embodiment of the present invention.
- FIG. 1 is a diagram showing a configuration example (2) of wireless power supply according to an embodiment of the present invention.
- FIG. 4 is a sequence diagram for explaining an example of wireless power supply according to an embodiment of the present invention.
- 1 is a flowchart for explaining an example of wireless power supply according to an embodiment of the present invention.
- FIG. 1 is a diagram showing an example (1) of wireless power supply according to an embodiment of the present invention.
- FIG. 11 is a diagram showing an example (2) of wireless power supply according to an embodiment of the present invention.
- FIG. 1 is a diagram illustrating an example of the configuration of a wireless communication system.
- FIG. 1 is a diagram showing a configuration example (1) of wireless power supply according to an embodiment of the present invention.
- FIG. 1 is a diagram showing a configuration example (2) of wireless power supply according to
- FIG. 11 is a diagram showing an example (3) of wireless power supply according to an embodiment of the present invention.
- FIG. 11 is a diagram showing an example (4) of wireless power supply according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to an embodiment of the present invention.
- 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention.
- FIG. 2 is a diagram showing an example of the configuration of a vehicle 2001 according to an embodiment of the present invention.
- LTE Long Term Evolution
- LTE-Advanced LTE-Advanced and methods subsequent to LTE-Advanced (e.g., NR and 6G wireless standards) unless otherwise specified.
- SS Synchronization signal
- PSS Primary SS
- SSS Secondary SS
- PBCH Physical broadcast channel
- PRACH Physical random access channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- PUCCH Physical Uplink Control Channel
- PUSCH Physical Uplink Shared Channel
- NR corresponds to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc.
- NR- even if a signal is used in NR, it is not necessarily specified as "NR-".
- the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or another method (e.g., Flexible Duplex, etc.).
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- another method e.g., Flexible Duplex, etc.
- radio parameters and the like when radio parameters and the like are “configured,” it may mean that predetermined values are pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are configured.
- FIG. 1 is a diagram showing a configuration example (1) of a wireless communication system in an embodiment of the present invention.
- the wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20.
- FIG. 1 shows one base station 10 and one terminal 20, this is an example, and there may be multiple of each.
- the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
- the physical resources of a wireless signal are defined in the time domain and the frequency domain, and the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks.
- the base station 10 transmits a synchronization signal and system information to the terminal 20.
- the synchronization signal is, for example, NR-PSS and NR-SSS.
- the system information is, for example, transmitted by NR-PBCH and is also called broadcast information.
- the synchronization signal and system information may be called SSB (SS/PBCH block). As shown in FIG.
- the base station 10 transmits a control signal or data to the terminal 20 in DL (Downlink) and receives a control signal or data from the terminal 20 in UL (Uplink). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. In addition, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL. In addition, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) using CA (Carrier Aggregation). Furthermore, the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).
- SCell Secondary Cell
- PCell Primary Cell
- CA Carrier Aggregation
- the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10
- the terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives control signals or data from the base station 10 in DL and transmits control signals or data to the base station 10 in UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 also receives various reference signals transmitted from the base station 10, and performs measurement of the propagation path quality based on the reception results of the reference signals.
- M2M Machine-to-Machine
- the terminal 20 is capable of performing carrier aggregation, which bundles multiple cells (multiple CCs (Component Carriers)) together to communicate with the base station 10.
- carrier aggregation one PCell (Primary cell) and one or more SCells (Secondary cells) are used.
- a PUCCH-SCell having a PUCCH may also be used.
- WPT wireless power transfer
- wireless power supply is being considered from the standpoints of cost and battery replacement, and for handheld terminals, from the standpoints of cost and terminal size/shape. If highly efficient, large-capacity wireless power supply becomes possible, it is expected that terminals will become even more advanced and diversified.
- a specific frequency band will be allocated to wireless power supply, and the effects on the human body and radio interference with other communication devices will be verified. If no problems are found, the scope of use will be expanded to outdoors and other spaces where people are present.
- 3GPP registered trademark
- 3GPP is also studying the specifications for ultra-low power terminals that are assumed to be powered by the surrounding environment, such as sunlight, wind, water, electromagnetism, heat, sound, vibration, etc., or wirelessly (for example, non-patent document 2).
- the realization of wireless power supply will eliminate the need for battery charging, wired charging, or battery replacement.
- the terminal 20B may be wirelessly powered from the terminal 20A or the power transmission equipment 30 connected to the terminal 20A.
- the terminal 20A or the power transmission equipment 30 that transmits power to the terminal 20B and the terminal 20A that transmits and receives data may be the same or different.
- the device that supplies power i.e., the power transmission device 30, may have the characteristics shown in 1)-3) below.
- the type of the power transmission equipment 30 may be equipment equivalent to a base station, an IAB (Integrated Access Backhaul), a repeater, a RIS (Reconfigurable Intelligent Surface), a TRP (transmission/reception point) or a terminal, or the functions of the power transmission equipment may be separately specified.
- a base station, IAB, repeater, RIS, TRP or terminal that provides wireless power supply may be assumed to have full duplex capability.
- the IAB, repeater, RIS, TRP, or terminal that wirelessly supplies power may be connected to the base station when supplying power, or may be in a disconnected state when supplying power.
- the terminal 20 to be powered may have the characteristics shown in 1)-3) below.
- It may or may not have the ability to connect to a base station, IAB, repeater, RIS, TRP, or terminal for data communication.
- the type or shape of the terminal may be, but is not limited to, a handheld terminal (smartphone, tablet, etc.), an IoT terminal (sensor, wearable terminal, surveillance camera, smart device, home appliance, etc.), an ambient IoT terminal (tag, card, etc.), a robot, a drone, an electric vehicle, a PC, etc.
- FIG. 2 is a diagram showing a configuration example (1) of wireless power supply according to an embodiment of the present invention.
- the power transmission equipment 30 may be installed separately from the terminal 20A and may perform wireless power supply to the terminal 20B.
- the terminal 20A may communicate with the terminal 20B and control the wireless power supply by the power transmission equipment 30.
- the power transmission equipment 30 may be installed on a wall, a ceiling, etc. indoors, or on a utility pole, etc. outdoors.
- the terminal 20B may also operate as the power transmission equipment 30 and perform wireless power supply to another terminal 20B.
- performing wireless power supply from the power transmission equipment 30 not included in the terminal 20A to the terminal 20B is also described as performing wireless power supply from the terminal 20A to the terminal 20B.
- FIG. 3 is a diagram showing a configuration example (2) of wireless power supply according to an embodiment of the present invention.
- power transmission equipment 30 may be installed together with terminal 20A and may perform wireless power supply to terminal 20B.
- Terminal 20A may communicate with terminal 20B and control wireless power supply by power transmission equipment 30.
- performing wireless power supply from power transmission equipment 30 included in terminal 20A to terminal 20B will also be described as performing wireless power supply from terminal 20A to terminal 20B.
- wireless power supply may be performed as described in the following operations 1) to 7).
- the following operations 1) to 7) may also be applied in the same way when sidelink communication is performed in resources based on a notification from the base station or network operator.
- one or more of operations 1) to 7) may be performed in combination, or all of the operations may be performed.
- a certain UE (hereinafter referred to as “UE-X”) supplies power to another UE (hereinafter referred to as "UE-Y”) via radio in a side link.
- UE-X UE-X
- UE-Y UE-Y
- the execution flow may include any or all of the steps shown in FIG. 4 below, or may include some steps but not all of the steps.
- FIG. 4 is a sequence diagram for explaining an example of wireless power supply according to an embodiment of the present invention.
- UE-X transmits a UE discovery signal to UE-Y.
- UE-Y may also transmit a UE discovery signal to UE-X.
- UE-Y and UE-X execute PC5-RRC connection establishment.
- UE-Y may initiate the PC5-RRC connection establishment, or UE-X may initiate the PC5-RRC connection establishment.
- UE-Y transmits a power supply request to UE-X.
- UE-X performs power supply to UE-Y.
- UE-Y transmits a report of the power supply status and/or the channel status to UE-X.
- UE-X and UE-Y may repeatedly execute steps S104 and S105.
- operations related to beam control may or may not be performed.
- the same beam as that used for communication may be used for power supply.
- beam control for wireless power supply may be performed, and the beam control for wireless power supply may be the same as or different from the beam control for communication.
- Operation 1) makes it possible to wirelessly supply power from one terminal to another.
- the UE-X that supplies power may transmit a signal for UE discovery.
- the transmission of the signal for UE discovery may mean a notification that power supply can be performed.
- the UE-Y that receives power may receive and/or monitor the signal for UE discovery. Based on information related to the received signal (e.g., strength), the UE-Y may determine that the UE-X is the UE to which the power supply operation will be performed. After that, a PC5-RRC connection may be established between the UE-X and the UE-Y.
- the UE-Y receiving the power supply may transmit a signal for UE discovery.
- the transmission of the signal for UE discovery may mean a notification that a UE that can perform power supply is being searched for.
- the UE-X performing the power supply may receive and/or monitor the signal for UE discovery.
- the UE-X performing the power supply may transmit a response signal to the UE-Y.
- the response signal may be a signal from the UE-X to the UE-Y notifying that power supply can be performed.
- the UE-X may decide whether or not to transmit the response signal based on information related to the received signal (e.g., strength).
- the UE-Y may decide that the UE-X that transmitted the response signal is the UE to perform the power supply operation. After that, a PC5-RRC connection may be established between the UE-X and the UE-Y.
- Discovery signals may be transmitted on resources defined for discovery or resources provided by configuration or pre-configuration, or on resources for communication.
- the discovery signal may notify or receive the fact that wireless power supply will be performed or received. Furthermore, the discovery signal may notify or receive information related to wireless power supply (e.g., method, resources, etc.).
- the transmission, reception, or monitoring of discovery signals may be performed regardless of whether power supply is being performed or not, or may be performed only during times when power supply is not being performed.
- capabilities related to wireless power supply may be transmitted and received, and the success or failure of the establishment of the PC5-RRC connection may be determined based on the capabilities.
- Whether UE-X or UE-Y transmits a discovery signal may be defined in the specifications or may be determined based on (pre)settings.
- Operation 2 makes it possible to discover the target for which the power supply operation is to be performed.
- UE-Y may transmit a power supply request to UE-X.
- the power supply request one or more pieces of information 1)-12) shown below may be transmitted.
- Information indicating how much power is desired to be supplied may be energy [Wh], or the remaining battery capacity, the battery capacity deficiency, and/or the chargeable battery capacity at the time of reporting.
- the UE-X may determine the amount of power to be supplied based on the information.
- Channel status may be information measured based on a signal related to the above operation 2), or may be information measured based on the above signal for discovery.
- the channel status may be information measured based on a signal related to communication.
- Capability related to wireless power supply may be a capability indicating whether or not a power supply method is supported, or a capability indicating whether or not simultaneous execution of communication and wireless power supply is supported.
- Capability information related to wireless power supply may include some or all of the frequencies, carriers, bands, FR (Frequency Range), band combinations, and network types that can receive power supply.
- UE-Y may report to UE-X that it supports power supply in units of frequencies, carriers, bands, FRs, band combinations, or network types.
- the network type may be any of TN (Terrestrial Network), NTN (Non-Terrestrial Network), Licensed-spectrum, Unlicensed-spectrum, IAB (Integrated Access and Backhaul), NCR (Network-controlled repeater), RIS (Reconfigurable Intelligent Surface), Uu (radio interface between UTRAN (Universal Terrestrial Radio Access Network) and UE (User Equipment)), and SL (Sidelink).
- UE-Y may report to UE-Y whether or not it is possible to receive power in each of these networks.
- Capability information related to wireless power supply may include a method capable of receiving power supply.
- UE-Y may report to UE-X that it supports power reception for each method.
- One of the methods may be reported as being supported as a default method, and other methods may be reported to UE-X as additionally supported methods.
- the methods may include waveform, subcarrier spacing, signal type, number of antennas, and beam management operation.
- Capability information related to wireless power supply may include a maximum supportable power receiving capacity, a maximum supportable efficiency, and/or a maximum supportable power.
- a specific maximum power receiving capacity, maximum efficiency, and/or maximum power per time may be reported.
- a specific power receiving capacity, a specific efficiency, and/or a specific power may be specified, and it may be reported that the specific power receiving capacity, the specific efficiency, and/or the specific power is met.
- UE-Y may report to UE-X that it supports simultaneous power reception and communication for each band combination.
- the network type may be any of the following networks: TN, NTN, licensed band, unlicensed band, IAB, NCR, RIS, Uu, and SL.
- Capability information indicating that simultaneous power reception and communication is supported for each power supply method may be DL, UL, or full duplex communication.
- UE-Y may report to UE-X that it supports simultaneous power reception and communication for each communication method.
- Capability information that indicates support for simultaneous power reception and communication, separately indicating whether the communication beam and power supply beam are the same or not.
- Capability information that indicates support for simultaneous power reception and communication, distinguishing whether the communication cell (or band) and the power supply cell (or band) are the same or not.
- Capability information that indicates whether simultaneous power reception and communication is supported, separately by distinguishing whether the communication partner and the power supply partner are the same or not.
- the partner may be a device or a TRP.
- supporting simultaneous execution may be a condition that the quality required for communication and power supply during non-concurrent execution is also satisfied when communication and power supply are executed simultaneously, or a condition that the quality required for communication and power supply during non-concurrent execution is lower by a predetermined value when communication and power supply are executed simultaneously.
- the timing and/or resources for transmitting the power supply request signal may be determined autonomously by the UE-Y.
- the timing for transmitting the power supply request signal may be limited to a time when power is not being received and/or a time when it is not determined that power will be received in the future.
- the power supply request signal may be transmitted and received via any of the control channel (PSCCH), data channel (PSSCH), discovery channel (PSDCH), and reporting channel (Physical Sidelink Feedback Channel (PSFCH)).
- PSCCH control channel
- PSSCH data channel
- PSDCH discovery channel
- PSFCH Physical Sidelink Feedback Channel
- the power supply request signal When the power supply request signal is transmitted in a Sidelink Shared Channel (SL-SCH), it may be transmitted in any of a MAC-CE, a MAC subheader, or a MAC-SDU (Service data unit).
- the power supply request signal may be prioritized in any way with data from a Common Control Channel (SL-CCCH), data from any logical channel other than data from the SL-CCCH, or a MAC-CE.
- SL-CCCH Common Control Channel
- the power supply request signal may have a lower priority than data from the SL-CCCH.
- the power supply request signal may have a lower priority than data from any logical channel other than data from the SL-CCCH.
- a priority order may be defined between the power supply request signal and the UL signal. It may be higher or lower than the priority order for wireless power supply in Uu. It may be higher or lower than the priority order for control information in Uu. It may be higher or lower than the priority order for data signals in Uu.
- Operation 3 allows a terminal to request wireless power supply from another terminal.
- UE-X may transmit information regarding power supply resources to UE-Y and/or other UEs, and perform power supply to UE-Y using those resources.
- FIG. 5 is a flowchart for explaining an example of wireless power supply according to an embodiment of the present invention.
- UE-X autonomously selects resources to be used for power supply.
- Each UE-X (UE-X1, UE-X2, ...) may notify each other of the resources to be used for power supply, monitor the notifications, and determine the resources to be used for power supply based on the notifications, for example, so as not to overlap.
- UE-X may be scheduled by base station 10 for the resources to be used for power supply.
- overlap may mean overlap in the time domain or overlap in the frequency domain.
- UE-X notifies UE-Y of the resources to be used for power supply.
- the resources to be used for power supply may be notified as periodic resources, aperiodic resources, or semi-persistent resources for which activation, deactivation, or release is notified.
- the resources to be used for power supply may be notified as a specific time width.
- the unit of notification of the resources to be used for power supply may be a slot, a frame, milliseconds, seconds, minutes, etc.
- the unit of notification of the resources to be used for power supply may be a PRB and/or a subchannel, a band, a bandwidth, and/or a BWP, or a carrier frequency and/or a FR.
- a power supply beam corresponding to the resources may be notified. Notification of the resources to be used for power supply may be performed in the resources for communication.
- UE-Y receives power based on the notification from UE-X.
- UE-Y may receive power in a time resource in which a power supply beam of UE-X corresponding to the power supply beam used by the UE-Y's own device is used.
- UE-Y may receive power in a time resource in which a power supply transmission beam of UE-X corresponding to the power supply reception beam used by the UE-Y's own device is used.
- UE-Y may receive power in the notified resources and/or time resources in which the UE-Y's own device can receive power.
- UE-Y may receive power in all time resources of the notified resources, or in some of the time resources.
- the UE-Y may also assume that the time between the notification regarding power supply and the power supply start timing is equal to or longer than a predetermined period.
- the predetermined period may be determined based on the UE processing time.
- the notification from UE-X to UE-Y may be performed in any of the formats a)-e) shown below.
- Groupcast PSSCH e.g. MAC-CE
- SCI for all UEs and/or SCI for multiple UEs. All information regarding which power supply resource and which power supply beam are used for power supply may be reported. Resource information related to the power supply beam corresponding to the communication beam used for the report may be reported.
- a new SCI format for power supply may be defined, or resources for receiving the SCI format may be set or pre-set. Information may be notified via a field in the SCI format for communication.
- PC5-RRC connection unicast PSSCH (e.g. MAC-CE), and/or SCI for a specific UE.
- PSSCH e.g. MAC-CE
- SCI Session Initiation Protocol
- Information on resources to which the UE should receive power may be notified.
- Resource information related to a powering beam corresponding to the communication beam used for the notification may be notified.
- a new SCI format for powering may be defined, or resources for receiving the SCI format may be configured or pre-configured.
- Information may be notified via a field in the SCI format for communication.
- a Radio Network Temporary Identifier (RNTI) for transmitting power supply related information may be defined and used for such notifications. This may apply to a) and/or b) above.
- RNTI Radio Network Temporary Identifier
- the format in which the notification is made may be determined by RRC parameters or (pre)configuration.
- UE capabilities may be defined to indicate which formats the UE supports for receiving notifications, and may report support for the features it supports.
- supporting wireless power may mean supporting multiple or all of the defined notification formats.
- the power supply resources and the communication resources may be included in the same resource pool, or may be defined to be included in different resource pools, or may be set or pre-configured.
- Operation 4 allows the operation of receiving power from an appropriate resource to be performed. It also allows notifications related to power supply to be sent and received using an appropriate format.
- UE-Y may report information related to the power supply status to UE-X.
- the information may be the information shown in a)-d) below.
- It may be power [W], average power [W] and/or energy [Wh] related to the power supply performed in a specific time interval T.
- the start timing of the specific time interval T may be the start of power supply, the previous report, or a specified timing.
- the end timing of the specific time interval T may be just before the report, the specified timing, or a timing T has elapsed since the start timing.
- the definition of the specific time interval T is the same below.
- the range and/or granularity of the report value may be predefined or set.
- the report content may be an index corresponding to the report value, and the correspondence between the report value and the index may be predefined or set. For example, index Z1 may be reported when the report value is equal to or greater than X1 and less than X2, and index Z2 may be reported when the report value is equal to or greater than X2 and less than X3.
- the predetermined value and the specific time interval T2 may be defined or set in advance.
- the information indicating whether or not the power supply performed in a specific time interval T satisfies a specific condition may be reported from UE-Y to UE-X as an ACK (e.g., bit value 1) or a NACK (e.g., bit value 0).
- ACK e.g., bit value 1
- NACK e.g., bit value 0
- the information may also be information indicating how much remaining power supply is desired.
- the information may be energy [Wh].
- the information may be the remaining battery capacity or the battery capacity deficit at the time of reporting.
- Information related to the power supply status may be reported at the timings shown in a)-f) below. Information may be reported from UE-Y to UE-X.
- FIG. 6 is a diagram for explaining an example (1) of wireless power supply according to an embodiment of the present invention.
- a periodic resource related to power supply may be notified from UE-X, and the reporting of information related to the power supply status may be performed with a resource to be used for the report determined based on the periodic resource.
- UE-Y receives a power supply trigger to start power supply from UE-X, UE-Y may start power supply and may further start reporting information related to the power supply status.
- the power supply trigger transmitted from UE-X to UE-Y may include information indicating the periodic resource, or the periodic resource may be set in advance.
- UE-Y may report information related to the power supply status to UE-X only for the section from the start of power supply to the end of power supply. In addition, after starting the report related to the power supply status, UE-Y may continue the report until the setting of the report of the information related to the power supply status is changed regardless of whether power is being supplied or not.
- a periodic resource is configured by UE-X, and UE-Y may report information related to the power supply status to UE-X based on a configuration or notification of activation or deactivation (release) in the periodic resource. After being activated, UE-Y may periodically report information related to the power supply status to UE-X until it is deactivated. When UE-Y receives a deactivation command, UE-Y may transmit an ACK or NACK to UE-X. Activation or deactivation may be notified to UE-Y by DCI or MAC-CE (Medium Access Control-Control Element).
- UE-Y may report information related to the power supply status to UE-X only during the section from the start of power supply to the end of power supply. After starting reporting of the power supply status, UE-Y may continue reporting based on activation and deactivation regardless of whether power is being supplied or not.
- FIG. 7 is a diagram for explaining an example (2) of wireless power supply according to an embodiment of the present invention.
- UE-X may instruct a report and a resource to be used for the report, and UE-Y may aperiodically report information related to the power supply status using the resource.
- UE-X may instruct a report, and UE-Y may report information related to the power supply status using a resource selected autonomously.
- UE-Y may report information related to the power supply status to UE-X every time power supply is performed by a power supply trigger.
- UE-Y may report information related to the power supply status to UE-X at a timing determined by UE-Y itself based on a specific condition.
- the notification regarding the power supply may specify a report timing and/or resources, or enable the report.
- the power supply trigger shown in FIG. 6 or FIG. 7 may be the notification regarding the power supply.
- the UE-Y may start or execute a report regarding the power supply status.
- the UE-Y may assume that the time between the end of the report instruction, the enablement of the report, or the measurement target (e.g., the end of power supply) and the execution of the report is equal to or greater than a predetermined value.
- the predetermined value may be specified or determined, for example, based on the UE processing time.
- Reporting may be performed only when the power supply status satisfies a predetermined condition. Also, reporting may be performed only when the power supply status does not satisfy a predetermined condition.
- the timing and/or resources for transmitting the report on the power supply status may be determined autonomously by UE-Y.
- the timing for transmitting the report on the power supply status may be limited to a time when power is not being received and/or a time when it is not determined that power will be received in the future.
- Reports regarding power supply status may be transmitted and received via the control channel (PSCCH), data channel (PSSCH), discovery channel (PSDCH), or reporting channel (Physical Sidelink Feedback Channel (PSFCH)).
- PSCCH control channel
- PSSCH data channel
- PSDCH discovery channel
- PSFCH Physical Sidelink Feedback Channel
- a report on the power supply status When a report on the power supply status is transmitted in a Sidelink Shared Channel (SL-SCH), it may be transmitted in any of a MAC-CE, a MAC subheader, or a MAC-SDU (Service data unit).
- the report on the power supply status may be prioritized in any way relative to data from the Common Control Channel (SL-CCCH), data from any logical channel other than data from the SL-CCCH, or the MAC-CE.
- the report on the power supply status may have a lower priority than data from the SL-CCCH.
- the report on the power supply status may have a lower priority than data from any logical channel other than data from the SL-CCCH.
- a priority order may be defined between reports on the power supply status and UL signals. It may be higher or lower than the priority order for wireless power supply in Uu. It may be higher or lower than the priority order for control information in Uu. It may be higher or lower than the priority order for data signals in Uu.
- Operation 5 enables the terminal 20 to report information related to the results of power supply, and the base station 10 can appropriately control the power supply operation thereafter.
- a common understanding is reached between UE-X and UE-Y regarding the timing of reporting the power supply status.
- UE-X and/or UE-Y may prioritize one over the other.
- overlap may refer to overlap in the time domain or overlap in the frequency domain.
- UE-X may operate in a resource allocation operation so that overlap between power supply and communication does not occur. UE-X may not select resources that overlap with communication resources when selecting power supply resources. UE-X may not select resources that overlap with power supply resources when selecting communication resources. UE-X may not select resources that overlap with communication resources when selecting power supply resources, and may not select resources that overlap with power supply resources when selecting communication resources. UE-X may execute either an operation of not selecting resources that overlap with communication resources when selecting power supply resources, or an operation of not selecting resources that overlap with power supply resources when selecting communication resources, or may determine which one to execute based on, for example, the priority of power supply and communication.
- UE-X may operate so that the overlap does not occur in UE-X, and UE-X may operate so that the overlap does not occur in UE-Y.
- UE-Y notifies UE-X of its UE capabilities related to the overlap in advance, and UE-X performs resource selection based on UE-Y's capabilities so that the overlap does not occur in UE-Y.
- the UE-X may operate so that overlap does not occur when performing power supply and/or communication.
- the UE-X may drop either power supply or communication and perform the other, or may decide which to perform based on, for example, the priority of power supply or communication.
- the prioritization of power supply and communication may be predefined, or may be provided in a configuration, preconfiguration, or PC5-RRC configuration, or may be determined autonomously by the UE-X.
- Priority assignment with respect to power supply may be specified for each type of communication.
- power supply may have a lower priority than S-SSB, PSCCH, PSFCH (HARQ-ACK) or PSSCH.
- SL positioning RS may have a lower priority than power supply.
- Multiple priorities may be defined or set for power supply, and prioritization with respect to communication may be specified for each priority. For example, power supply during a specific time period may have a high priority (HP, high priority), and power supply outside the specific time period may have a low priority (LP, low priority).
- HP power supply may have a lower priority than HP communication.
- LP power supply may have a lower priority than HP power supply.
- FIG. 8 is a diagram showing an example (3) of wireless power supply according to an embodiment of the present invention.
- power supply need not be performed only in the section where power supply and communication overlap.
- power supply of a predetermined unit e.g., the entirety
- Not supplying power may mean dropping, canceling, or postponing the power supply.
- UE-X may notify UE-Y that power supply will not be performed using that resource at a timing before or after that resource.
- UE-Y may operate in such a way that, in the notification of preferred or non-preferred resources for inter-UE coordination, resources that overlap with power supply are not included in the recommended resources, but are included in the non-preferred resources.
- UE-Y may notify UE-X or the communication partner of the conflict.
- the UE-Y may operate so that overlap does not occur when performing power supply and/or communication.
- the UE-Y may drop either power supply or communication and perform the other, or may decide which to perform based on, for example, the priority of power supply or communication.
- the prioritization of power supply and communication may be predefined, or may be provided by configuration, preconfiguration, or PC5-RRC configuration, or may be determined autonomously by the UE-Y.
- Priority assignment with respect to power supply may be specified for each type of communication.
- power supply may have a lower priority than S-SSB, PSCCH, PSFCH (HARQ-ACK) or PSSCH.
- SL positioning RS may have a lower priority than power supply.
- Multiple priorities may be defined or set for power supply, and prioritization with respect to communication may be specified for each priority. For example, power supply during a specific time period may have a high priority (HP, high priority), and power supply outside the specific time period may have a low priority (LP, low priority).
- HP power supply may have a lower priority than HP communication.
- LP power supply may have a lower priority than HP power supply.
- Operation 6 operates to prevent overlap between power supply and communication, and can determine the action to take if they do overlap.
- FIG. 9 is a diagram showing an example (4) of wireless power supply according to an embodiment of the present invention.
- functions F a function for suppressing power consumption
- time period X a time period in which no signal is received and/or transmitted.
- Function F may be SL-DRX as shown in FIG. 9, transmission based on partial sensing, or transmission by random selection.
- UE-X and/or UE-Y may perform a power supply operation in a time period X during which no signal is received, in function F of power consumption.
- signal reception may be replaced with “signal reception and/or transmission.”
- signal reception may or may not include sensing.
- UE may be replaced with UE-X and/or UE-Y.
- the UE does not need to perform power supply operations during time period Y during which the signal is received.
- the UE may perform a power supply operation during the entire time period X, or may perform a power supply operation during a portion of the time period. During the time period X other than the portion of the time period, the power supply operation may not be performed based on the processing time of the UE. The power supply operation may be performed only during a time period that is set or notified to perform a power supply-related operation.
- function F is DRX
- power supply-related operations may be performed in time interval X when SL signals (e.g., PDCCH or PDSCH) are not received based on the DRX function, and power supply-related operations may not be performed in the DRX-ON period or in time interval Y when SL signals are received based on the DRX function.
- SL signals e.g., PDCCH or PDSCH
- the operation of performing a power supply operation during a time period X in which the UE does not receive signals in function F for suppressing power consumption described above may be applied only when the UE cannot simultaneously perform communication and power supply, or it may be determined whether or not to apply the operation based on a notification from the base station 10 or a (pre)setting.
- the power supply operation is performed only when function F, which reduces power consumption, is set. If function F is not set, wireless power supply may not be performed.
- a UE capable of performing a power supply operation may necessarily be capable of performing function F, which suppresses power consumption.
- a UE that reports to the network or other UE that it is capable of performing a power supply operation may also have to report to the network or other UE that it is capable of performing function F, which suppresses power consumption.
- UE-X may notify UE-Y that power supply will not be performed using that resource at a timing before or after that resource.
- power supply may mean power transmission and/or power reception.
- Operation 7 makes it possible to efficiently supply power between UEs by power supply while suppressing power consumption related to communication. It is possible to increase the remaining battery level during the time period when the UE suppresses power consumption. It is possible to optimize the power supply operation for non-reception times determined by various functions, and it is possible to avoid deterioration of communication quality.
- the above-described embodiment allows a terminal to perform wireless power supply in a wireless communication system.
- the base station 10 and the terminal 20 include functions for implementing the above-mentioned embodiments. However, the base station 10 and the terminal 20 may each include only a part of the functions in the embodiments.
- Fig. 10 is a diagram showing an example of a functional configuration of base station 10 in the embodiment of the present invention.
- 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. 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.
- power transmission equipment 30 may have the same functional configuration as base station 10.
- the transmitting unit 110 has a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly.
- the transmitting unit 110 also transmits inter-network node messages to other network nodes.
- the receiving unit 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signals.
- the transmitting unit 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, etc. to the terminal 20.
- the receiving unit 120 also receives inter-network node messages from other network nodes.
- the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20.
- the contents of the setting information include, for example, information related to wireless power supply.
- the control unit 140 performs control to realize the functions described in the embodiments. Furthermore, as described in the embodiments, the control unit 140 performs control related to wireless power supply.
- the functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120.
- Fig. 11 is a diagram showing an example of a functional configuration of the terminal 20 in the embodiment of the present invention.
- the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240.
- the functional configuration shown in Fig. 11 is merely an example.
- the names of the functional divisions and functional units may be any as long as they can execute the operations related to the embodiment of the present invention.
- the transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly.
- the receiver 220 wirelessly receives various signals and acquires higher layer signals from the received physical layer signals.
- the receiver 220 also has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, etc. transmitted from the base station 10.
- the transmitter 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to another terminal 20 as D2D communication, and the receiver 220 receives PSCCH, PSSCH, PSDCH, PSBCH, etc. from the other terminal 20.
- PSCCH Physical Sidelink Control Channel
- PSSCH Physical Sidelink Shared Channel
- PSDCH Physical Sidelink Discovery Channel
- PSBCH Physical Sidelink Broadcast Channel
- the setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220.
- the setting unit 230 also stores setting information that is set in advance.
- the content of the setting information is, for example, information related to wireless power supply.
- the control unit 240 performs control to realize the functions described in the embodiments. Furthermore, as described in the embodiments, the control unit 240 performs control related to wireless power supply.
- the functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.
- each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.).
- the functional block may be realized by combining the one device or the multiple devices with software.
- Functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
- a functional block (component) that performs the transmission function is called a transmitting unit or transmitter.
- the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
- FIG. 12 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 power transmission equipment 30 may have the same hardware configuration as the base station 10.
- 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. 10 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. 11 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 performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one structure (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.
- the power transmission device 30 may also have hardware constituting a power transmission unit for wirelessly supplying power to the terminal 20.
- the terminal 20 may also have hardware constituting a power receiving unit for receiving wireless power from the power transmission device 30.
- the terminal 20 may also have hardware constituting a power transmission unit for wirelessly supplying power to the terminal 20.
- FIG. 13 shows an example configuration of a vehicle 2001.
- the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013.
- a communication device mounted on the vehicle 2001 and may be applied to the communication module 2013, for example.
- the drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.
- the steering unit 2003 includes at least a steering wheel (also called a handlebar), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.
- the electronic control unit 2010 is composed of a microprocessor 2031, memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001.
- the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
- Signals from the various sensors 2021-2029 include a current signal from a current sensor 2021 that senses the motor current, a front or rear wheel rotation speed signal acquired by a rotation speed sensor 2022, a front or rear wheel air pressure signal acquired by an air pressure sensor 2023, a vehicle speed signal acquired by a vehicle speed sensor 2024, an acceleration signal acquired by an acceleration sensor 2025, an accelerator pedal depression amount signal acquired by an accelerator pedal sensor 2029, a brake pedal depression amount signal acquired by a brake pedal sensor 2026, a shift lever operation signal acquired by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 2028.
- the information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices.
- the information service unit 2012 uses information acquired from an external device via the communication module 2013 or the like to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.
- the information service unit 2012 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside.
- input devices e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.
- output devices e.g., a display, a speaker, an LED lamp, a touch panel, etc.
- the driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as a millimeter wave radar, LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high definition (HD) maps, autonomous vehicle (AV) maps, etc.), a gyro system (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chip, and AI processor, as well as one or more ECUs that control these devices.
- the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize driving assistance functions or autonomous driving functions.
- the communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port.
- the communication module 2013 transmits and receives data via the communication port 2033 between the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided 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 may transmit at least one of the signals from the various sensors 2021-2028 described above input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication.
- the electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept input.
- the PUSCH transmitted by the communication module 2013 may include information based on the above input.
- the communication module 2013 receives various information (traffic information, signal information, vehicle distance information, etc.) transmitted from an external device, and displays it on the information service unit 2012 provided in the vehicle 2001.
- the information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 2013).
- the communication module 2013 also stores various information received from an external device in a memory 2032 that can be used by the microprocessor 2031.
- the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.
- a terminal having a communication unit that receives a discovery signal from a first terminal or transmits a discovery signal to the first terminal, the communication unit transmits a signal requesting power supply to the first terminal, the communication unit receives information from the first terminal indicating a first resource to be used for power supply, and the communication unit has a power receiving unit that receives power supply from the first terminal in the first resource.
- the above configuration allows a terminal to perform wireless power supply in a wireless communication system.
- the device may have a control unit that determines whether to receive power from the first terminal based on the strength of the signal received from the first terminal.
- the terminal can perform wireless power supply in the wireless communication system.
- the communication unit may transmit wireless power supply capabilities to the first terminal via a signal requesting the power supply.
- the terminal can efficiently perform wireless power supply in a wireless communication system.
- the communication unit may transmit the capacity to be supplied to the first terminal via the signal requesting the supply of power.
- the terminal can efficiently perform wireless power supply in the wireless communication system.
- the power receiving unit may receive power in a time resource in which a power supply transmission beam of the first terminal corresponding to a power supply reception beam used by the power receiving unit is used.
- a power supply method in which a terminal executes the steps of receiving a discovery signal from a first terminal or transmitting a discovery signal to the first terminal, transmitting a signal requesting power supply to the first terminal, receiving information from the first terminal indicating a first resource to be used for power supply, and receiving power supply from the first terminal in the first resource.
- the above configuration allows a terminal to perform wireless power supply in a wireless communication system.
- 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 above-mentioned parameters are not limiting in any respect. Furthermore, the formulas etc. using these parameters may differ from those explicitly disclosed in this disclosure.
- the various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any respect.
- base station BS
- wireless base station base station
- base station device fixed station
- NodeB nodeB
- eNodeB eNodeB
- gNodeB gNodeB
- access point e.g., "transmission point”
- gNodeB gNodeB
- a base station may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.
- a base station can accommodate one or more (e.g., three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)).
- RRH Remote Radio Head
- the term "cell” or “sector” refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.
- a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.
- MS Mobile Station
- UE User Equipment
- a mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc.
- At least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.
- the moving object is a movable object, and the moving speed is arbitrary. It also includes the case where the moving object is stopped.
- the moving object includes, but is not limited to, for example, a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, an excavator, a bulldozer, a wheel loader, a dump truck, a forklift, a train, a bus, a handcar, a rickshaw, a ship and other watercraft, an airplane, a rocket, an artificial satellite, a drone (registered trademark), a multicopter, a quadcopter, a balloon, and objects mounted thereon.
- the moving object may also be a moving object that travels autonomously based on an operation command.
- At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations.
- at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read as a user terminal.
- each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)).
- the terminal 20 may be configured to have the functions of the base station 10 described above.
- terms such as "uplink” and "downlink” may be read as terms corresponding to terminal-to-terminal communication (for example, "side").
- the uplink channel, downlink channel, etc. may be read as a side channel.
- the user terminal in this disclosure may be interpreted as a base station.
- the base station may be configured to have the functions of the user terminal described above.
- determining may encompass a wide variety of actions.
- Determining and “determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., searching in a table, database, or other data structure), and considering ascertaining as “judging” or “determining.”
- determining and “determining” may include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and considering ascertaining as “judging” or “determining.”
- judgment” and “decision” can include considering resolving, selecting, choosing, establishing, comparing, etc., to have been “judged” or “decided.” In other words, “judgment” and “decision” can include considering some action to have been “judged” or “decided.” Additionally, “judgment (decision)” can be interpreted as “assuming,” “ex
- connection refers to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
- the coupling or connection between elements may be physical, logical, or a combination thereof.
- “connected” may be read as "access.”
- two elements may be considered to be “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.
- the reference signal may also be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.
- the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
- any reference to an element using a designation such as "first,” “second,” etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.
- a radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.
- Numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, a 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 for a UE within one carrier.
- At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
- BWP bitmap
- radio frames, subframes, slots, minislots, and symbols are merely examples.
- the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
- a and B are different may mean “A and B are different from each other.”
- the term may also mean “A and B are each different from C.”
- Terms such as “separate” and “combined” may also be interpreted in the same way as “different.”
- notification of specific information is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the specific information).
- Base station 110 Transmitter 120 Receiver 130 Setting unit 140 Control unit 20 Terminal 210 Transmitter 220 Receiver 230 Setting unit 240 Control unit 30 Power transmission equipment 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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Abstract
Description
次に、これまでに説明した処理及び動作を実行する基地局10及び端末20の機能構成例を説明する。基地局10及び端末20は上述した実施例を実施する機能を含む。ただし、基地局10及び端末20はそれぞれ、実施例の中の一部の機能のみを備えることとしてもよい。
図10は、本発明の実施の形態における基地局10の機能構成の一例を示す図である。図10に示されるように、基地局10は、送信部110と、受信部120と、設定部130と、制御部140とを有する。図10に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。なお、送電機器30は、基地局10と同様の機能構成を有してもよい。
図11は、本発明の実施の形態における端末20の機能構成の一例を示す図である。図11に示されるように、端末20は、送信部210と、受信部220と、設定部230と、制御部240とを有する。図11に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。
上記実施形態の説明に用いたブロック図(図10及び図11)は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
以上、説明したように、本発明の実施の形態によれば、ディスカバリ用信号を第1の端末から受信するか、又は、ディスカバリ信号を前記第1の端末に送信する通信部を有し、前記通信部は、給電を要求する信号を前記第1の端末に送信し、前記通信部は、給電に使用する第1のリソースを示す情報を前記第1の端末から受信し、前記第1のリソースにおいて前記第1の端末から給電を受ける受電部を有する端末が提供される。
以上、本発明の実施の形態を説明してきたが、開示される発明はそのような実施形態に限定されず、当業者は様々な変形例、修正例、代替例、置換例等を理解するであろう。発明の理解を促すため具体的な数値例を用いて説明がなされたが、特に断りのない限り、それらの数値は単なる一例に過ぎず適切な如何なる値が使用されてもよい。上記の説明における項目の区分けは本発明に本質的ではなく、2以上の項目に記載された事項が必要に応じて組み合わせて使用されてよいし、ある項目に記載された事項が、別の項目に記載された事項に(矛盾しない限り)適用されてよい。機能ブロック図における機能部又は処理部の境界は必ずしも物理的な部品の境界に対応するとは限らない。複数の機能部の動作が物理的には1つの部品で行われてもよいし、あるいは1つの機能部の動作が物理的には複数の部品により行われてもよい。実施の形態で述べた処理手順については、矛盾の無い限り処理の順序を入れ替えてもよい。処理説明の便宜上、基地局10及び端末20は機能的なブロック図を用いて説明されたが、そのような装置はハードウェアで、ソフトウェアで又はそれらの組み合わせで実現されてもよい。本発明の実施の形態に従って基地局10が有するプロセッサにより動作するソフトウェア及び本発明の実施の形態に従って端末20が有するプロセッサにより動作するソフトウェアはそれぞれ、ランダムアクセスメモリ(RAM)、フラッシュメモリ、読み取り専用メモリ(ROM)、EPROM、EEPROM、レジスタ、ハードディスク(HDD)、リムーバブルディスク、CD-ROM、データベース、サーバその他の適切な如何なる記憶媒体に保存されてもよい。
110 送信部
120 受信部
130 設定部
140 制御部
20 端末
210 送信部
220 受信部
230 設定部
240 制御部
30 送電機器
1001 プロセッサ
1002 記憶装置
1003 補助記憶装置
1004 通信装置
1005 入力装置
1006 出力装置
2001 車両
2002 駆動部
2003 操舵部
2004 アクセルペダル
2005 ブレーキペダル
2006 シフトレバー
2007 前輪
2008 後輪
2009 車軸
2010 電子制御部
2012 情報サービス部
2013 通信モジュール
2021 電流センサ
2022 回転数センサ
2023 空気圧センサ
2024 車速センサ
2025 加速度センサ
2026 ブレーキペダルセンサ
2027 シフトレバーセンサ
2028 物体検出センサ
2029 アクセルペダルセンサ
2030 運転支援システム部
2031 マイクロプロセッサ
2032 メモリ(ROM,RAM)
2033 通信ポート(IOポート)
Claims (6)
- ディスカバリ用信号を第1の端末から受信するか、又は、ディスカバリ信号を前記第1の端末に送信する通信部を有し、
前記通信部は、給電を要求する信号を前記第1の端末に送信し、
前記通信部は、給電に使用する第1のリソースを示す情報を前記第1の端末から受信し、
前記第1のリソースにおいて前記第1の端末から給電を受ける受電部を有する端末。 - 前記第1の端末から受信した信号の強度に基づいて、前記第1の端末から給電を受けることを決定する制御部を有する請求項1記載の端末。
- 前記通信部は、前記給電を要求する信号を介して無線給電に係る能力を前記第1の端末に送信する請求項1記載の端末。
- 前記通信部は、前記給電を要求する信号を介して給電する容量を前記第1の端末に送信する請求項1記載の端末。
- 前記受電部は、自装置が使用する給電向け受信ビームに対応する前記第1の端末の給電向け送信ビームが使用される時間リソースで給電を受ける請求項1記載の端末。
- ディスカバリ用信号を第1の端末から受信するか、又は、ディスカバリ信号を前記第1の端末に送信する手順と、
給電を要求する信号を前記第1の端末に送信する手順と、
給電に使用する第1のリソースを示す情報を前記第1の端末から受信する手順と、
前記第1のリソースにおいて前記第1の端末から給電を受ける手順とを端末が実行する給電方法。
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| JP2015012713A (ja) * | 2013-06-28 | 2015-01-19 | 株式会社豊田自動織機 | 非接触充電システム |
| WO2020026412A1 (ja) * | 2018-08-02 | 2020-02-06 | マクセル株式会社 | 無線端末装置および無線給電装置 |
| WO2020153215A1 (ja) * | 2019-01-25 | 2020-07-30 | 京セラ株式会社 | 通信制御方法、送信側端末、及び受信側端末 |
| WO2023026378A1 (ja) * | 2021-08-24 | 2023-03-02 | 株式会社Nttドコモ | 端末及び通信方法 |
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| JP2015012713A (ja) * | 2013-06-28 | 2015-01-19 | 株式会社豊田自動織機 | 非接触充電システム |
| WO2020026412A1 (ja) * | 2018-08-02 | 2020-02-06 | マクセル株式会社 | 無線端末装置および無線給電装置 |
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