WO2023026698A1 - Système de radiocommunication - Google Patents

Système de radiocommunication Download PDF

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Publication number
WO2023026698A1
WO2023026698A1 PCT/JP2022/026905 JP2022026905W WO2023026698A1 WO 2023026698 A1 WO2023026698 A1 WO 2023026698A1 JP 2022026905 W JP2022026905 W JP 2022026905W WO 2023026698 A1 WO2023026698 A1 WO 2023026698A1
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WO
WIPO (PCT)
Prior art keywords
wireless
power
power supply
unit
communication system
Prior art date
Application number
PCT/JP2022/026905
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English (en)
Japanese (ja)
Inventor
弘一 柳澤
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株式会社日立国際電気
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Priority to JP2023543735A priority Critical patent/JP7585505B2/ja
Publication of WO2023026698A1 publication Critical patent/WO2023026698A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—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
    • H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—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
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • 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
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices

Definitions

  • the present invention relates to a wireless communication system, and more particularly to a wireless communication system capable of efficiently performing wireless power supply.
  • RRH Remote Radio Head
  • ROF Radio Over Fiber
  • DAS Distributed Antenna System
  • other optical transmission devices are typified by such systems.
  • the optical transmission device includes a SlavePort optical conversion unit and a MasterPort optical conversion unit, is equipped with an optical transceiver, and has a function of performing data communication between a master station (master device) and a slave station (slave device).
  • Some of these optical transmission devices use technologies such as SERDES (SERializer/DESerializer) and CPRI (Common Public Radio Interface), which are high-speed serial communication standards.
  • SERDES Serializer/DESerializer
  • CPRI Common Public Radio Interface
  • An optical transmission device is used, for example, in an antenna extension wireless communication system in which a plurality of slave units (antenna units) that perform wireless communication with a mobile unit are connected to a master unit via an optical cable.
  • Antenna devices are radios with directional antennas, some of which use DAS devices or ROF devices.
  • the extended antenna wireless system extends the communicable area by distributing the radio waves from the base station to multiple slave units via optical cables. Widely used in the environment.
  • wireless power supply Also, in recent years, there is a technology of wireless power supply that transmits power without using a cable to power a smartphone, an electric vehicle, or the like.
  • Methods of wireless power supply include an electromagnetic induction method, a magnetic resonance method, an electric field coupling method, a radio wave reception method, and the like.
  • Patent Document 1 Japanese Unexamined Patent Application Publication No. 2014-150388 “Wireless Communication Device, Control Method and Control Program”
  • Patent Document 2 Japanese Unexamined Patent Application Publication No. 2008-148520 “Mobile Device”
  • Patent Document 1 discloses a directivity control method capable of adjusting the beam angle at high speed in a wireless communication system that autonomously adjusts the beam angle of a directional antenna. Further, Patent Literature 2 describes a portable device capable of charging different types of portable devices with a single non-contact charging device.
  • Patent Documents 1 and 2 do not describe a configuration for efficiently performing wireless power feeding in an antenna extension radio system.
  • the present invention has been made in view of the above-mentioned actual situation, and it is an object of the present invention to provide a wireless communication system capable of efficiently performing wireless power feeding in an antenna extension wireless system.
  • the present invention for solving the problems of the conventional example is a radio communication system having a fixed radio connected to a centralizing device and performing radio communication with a plurality of mobile radio devices, wherein the fixed radio: It is characterized by connecting to a wireless power supply device that wirelessly supplies power to a mobile wireless device, detecting received power of the mobile wireless device, and controlling power supply in the wireless power supply device.
  • the fixed wireless device controls the directivity of feeding radiation in the wireless power feeding device according to the directivity of the antenna.
  • the fixed wireless device when the fixed wireless device detects the power received from the mobile wireless device, the fixed wireless device performs wireless power feeding with the wireless power feeding device, and detects the power received from the mobile wireless device. It is characterized by stopping wireless power feeding in the wireless power feeding device when it is not detected.
  • the fixed wireless device compares the power value of the received power from the mobile wireless device with a set power threshold, and determines the power value of the received power based on the power threshold. It is characterized in that execution or stop of wireless power feeding in the wireless power feeding device is controlled depending on the magnitude of .
  • the fixed wireless device is set with a power threshold received from the host device to which the aggregation device is connected.
  • the fixed wireless device calculates the value of the received power from the mobile wireless device and transmits it to the host device, and the power determined by the host device based on the value of the received power It is characterized in that the threshold is received from the host device and set.
  • a wireless communication system having a fixed wireless device that performs wireless communication with a plurality of mobile wireless devices and is connected to a centralizing device, wherein the fixed wireless device wirelessly supplies power to the mobile wireless device.
  • the radio communication system detects the received power of the mobile radio device and controls the power supply in the wireless power supply device.
  • the fixed wireless device is the above-mentioned wireless communication system that controls the directivity of feeding radiation from the wireless power supply device according to the directivity of the antenna, the shape of the place where the fixed wireless device is installed can be minimized. There is an effect that efficient wireless power feeding can be realized by adjusting the angle and beam width of the power feeding radiation according to .
  • the fixed wireless device performs wireless power supply by the wireless power supply device when the received power from the mobile wireless device is detected, and when the received power from the mobile wireless device is not detected.
  • the fixed wireless device compares the power value of the received power from the mobile wireless device with a set power threshold, and uses the power threshold as a reference to determine the magnitude of the received power. Since the above-described wireless communication system is used to control the implementation or suspension of wireless power supply in the power supply device, there is an effect that the implementation/stoppage of wireless power supply can be controlled by simple processing.
  • the wireless communication system is configured such that the fixed wireless device is set with the power threshold received from the host device to which the aggregating device is connected, the threshold value in each fixed wireless device can be changed at any time from the host device. , there is an effect that efficient wireless power supply can be realized in the entire system.
  • the fixed wireless device calculates the value of the received power from the mobile wireless device and transmits it to the host device, and the power threshold determined by the host device based on the value of the received power is transmitted to the host device. Since the above wireless communication system receives and sets from There is an effect that the power supply can be dynamically controlled to further improve the efficiency of the entire system.
  • FIG. 1 is an explanatory diagram showing a schematic configuration (1) of this wireless communication system
  • FIG. FIG. 2 is an explanatory diagram showing a schematic configuration (2) of this wireless communication system
  • FIG. 3 is an explanatory diagram showing the configuration of a first handset 3a
  • 4 is a flow chart showing power feeding device control processing in the first handset 3a.
  • FIG. 3 is an explanatory diagram showing the configuration of a second handset 3b; It is a flowchart which shows the operation
  • FIG. 11 is an explanatory diagram showing the configuration of a third handset 3c; It is a flowchart which shows the operation
  • FIG. 4 is an explanatory diagram showing a configuration in which a wireless power supply unit is incorporated in a slave device power supply device;
  • FIG. 11 is an explanatory diagram showing the configuration of a fourth handset 3d;
  • a wireless communication system performs wireless communication with a plurality of mobile devices and includes a child device connected to a parent device serving as an aggregation device. It connects to a wireless power supply device that wirelessly supplies power to a mobile device, detects the power received by the mobile device, and controls power supply in the wireless power supply device. It is possible to realize efficient wireless power supply by controlling /off and directivity of power supply radiation.
  • FIG. 1 is an explanatory diagram showing a schematic configuration (1) of this radio communication system
  • FIG. 2 is an explanatory diagram showing a schematic configuration (2) of this radio communication system.
  • this wireless communication system includes a host device 1, a parent device 2, a plurality of child devices 3, a power supply device 5, a wireless power supply device 6, and an optical cable 10.
  • the plurality of child devices 3 are wirelessly connected to the plurality of mobile devices 4 .
  • the child device corresponds to the fixed wireless device described in the claims
  • the parent device corresponds to the aggregation device.
  • a host device 1 is a device such as a server, and manages and controls a plurality of child devices 3 via a parent device 2 .
  • the base unit 2 is connected to a plurality of slave units 3 via optical cables 10, receives data via the optical cables 10, converts demodulated data into radio signals, and transmits the radio signals to a base station or the like.
  • Base unit 2 also receives a radio signal from a base station or the like, converts it into an optical signal, and transmits the optical signal to sub unit 3 .
  • base unit 2 serves as an aggregating device for the antenna extension radio system, mediates communication between a plurality of slave units 3 and host device 1, aggregates information from slave units 3, and , and the data from the host device 1 is transmitted to each slave device 3 .
  • the slave device 3 is connected to the master device 2 by an optical cable 10, and wirelessly communicates with the mobile device 4 via an antenna. Further, the handset 3 is connected to a wireless power supply device 6, which will be described later, and controls on (activation, execution)/off (stop) of wireless power supply and directivity of power supply radiation. The operation of the handset 3 will be described later.
  • the antenna of the handset 3 has directivity and forms an appropriate beam area.
  • a plurality of slave units 3 are installed on the ceiling or wall, and the direction and spread of the antenna beam are set according to the shape such as the size and depth of the installation location.
  • the host device 1 and the parent device 2 are connected by wire or wirelessly, and the parent device 2 and the child device 3 are connected by an optical cable 10.
  • a wireless power supply device 6 connected to each slave device 3 is provided.
  • the wireless power supply device 6 includes a wireless power supply antenna and wirelessly supplies power to the mobile device 4 .
  • a wireless power supply method is, for example, a radio wave reception method.
  • a power supply device 5 that supplies electric power to the wireless power supply device 6 is provided. 1 and 2, a power supply device and a power supply line for supplying power to the child device 3 are omitted.
  • FIG. 2 shows how radio waves from the mobile device 4 are received by the slave device 3 .
  • the slave unit 3 calculates the power of the received signal, confirms the presence or absence of the mobile unit 4, and activates the wireless power supply device 6 when it determines that the mobile unit 4 exists. do. Further, when the slave device 3 determines that the received power is low, it stops the operation of the wireless power supply device 6 .
  • the first handset 3a, the second handset 3b, and the third handset 3c are selected according to the method of setting the threshold used for controlling the wireless power supply device 6 and the control of the feeding radiation.
  • a fourth handset 3d which will be described in order below.
  • the first to fourth child devices (3a, 3b, 3c, 3d) may be referred to as child device 3 when not distinguished.
  • FIG. 3 is an explanatory diagram showing the configuration of the first child device.
  • FIG. 3 shows only the part related to the control of the wireless power supply device 6.
  • the first handset 3a includes a radio processing main unit 31 and an antenna 32.
  • the radio processing main unit 31 includes a radio processing unit 33, a power calculation unit 34, and a determination unit. 35 and a power supply device control unit 36 are provided.
  • the first handset 3 a is connected to the wireless power supply device 6 .
  • the power sources for the first handset 3a and the wireless power supply device 6 are independent.
  • a wireless power feeding antenna 61 of the wireless power feeding device 6 is built-in.
  • the wireless processing main unit 31 performs wireless communication with the mobile device 4, wired communication with the base device 2, and various processing associated with control of the wireless power supply device 6, which is a feature of this wireless communication system.
  • the antenna unit 32 is a directional antenna and performs wireless transmission/reception with the mobile device 4 .
  • the radio processing unit 33 performs signal processing, A/D conversion, D/A conversion, modulation/demodulation, up-conversion, and down-conversion associated with radio transmission/reception.
  • the power calculation unit 34 receives the demodulated signal from the radio processing unit 33 and calculates a power value by calculation. This power value is the received power value of the radio signal from the mobile device 4 received by the antenna 32 .
  • the determination unit 35 compares the power value calculated by the power calculation unit 34 with an internally set threshold value, determines whether the power value is greater than the threshold value, and performs wireless power feeding based on the determination result. It outputs information designating (instructing) ON/OFF of the operation of the device 6 .
  • the threshold value is set in advance in the determination unit 35 and stored in the internal storage unit.
  • the power feeding device control unit 36 controls on/off of feeding radiation from the antenna 61 of the wireless power feeding device 6 according to the instruction from the determination unit 35 .
  • the process of controlling the on/off of the operation of the wireless power supply device 6 in the handset 3 will be referred to as the power supply device control process.
  • the operation of the wireless power supply device 6 is performed.
  • the power feeding service can be performed, and when there is no mobile device 4 nearby and the power value is small (when the power received from the mobile device 4 is not detected), the operation of the wireless power feeding device 6 is stopped. Therefore, it is possible to realize efficient wireless power supply without consuming power unnecessarily.
  • the child device 3 autonomously controls the wireless power supply device 6, the processing load on the base device 2 and the host device 1 does not increase, and the system as a whole realizes efficient wireless power supply. It is possible.
  • the operation of the child device 3 is not affected by power fluctuations caused by turning on/off the wireless power feeding device 6. can be prevented.
  • FIG. 4 is a flow chart showing power feeding device control processing in the first handset 3a.
  • the power feeding device control process is common not only to the first child device 3a but also to the second to fourth child devices, but here the first child device 3a will be described as an example.
  • the determination unit 35 of the first handset 3a first acquires a threshold for comparison with the power value (S11).
  • the threshold value stored inside the determination unit 35 is read.
  • a threshold specified by the host device 1 or the parent device 2 is acquired.
  • the threshold value may be stored internally, or a value specified by the host device 1 or the parent device 2 may be obtained.
  • the radio processing unit 33 of the first handset 3a demodulates the signal received by the antenna 32 (S12), and the determination unit 35 calculates the power value of the received signal based on the demodulated signal. It is compared with a threshold value to determine whether or not the power value is greater than the threshold value (S13).
  • the determination unit 35 Based on the determination result, the determination unit 35 outputs information instructing the power supply device control unit 36 to turn on/off the activation of the wireless power supply device 6 (S14). As described above, the power supply operation of the wireless power supply device 6 is started (or continued) when the power value is larger than the threshold, and the power supply operation of the wireless power supply device 6 is stopped when the power value is smaller than the threshold. , to output instructions.
  • the power supply device control unit 36 controls the wireless power supply device 6 according to the instruction from the determination unit 35 . In this manner, the power feeding device control processing in the first handset 3a of the wireless communication system is performed.
  • FIG. 5 is an explanatory diagram showing the configuration of the second handset 3b.
  • the same reference numerals are assigned to the same parts as those of the first handset 3a, and the description thereof will be omitted.
  • the second child device 3b has the structure of the first child device 3a shown in FIG.
  • the wired interface unit 38 is an interface that is connected to the optical cable 10 that connects to the base unit 2 and receives a signal from the base unit 2, converts the optical signal into an electric signal, and outputs the electric signal.
  • the threshold value for determining the power value of the received power is stored in advance. is obtained and used as a threshold.
  • the wired interface unit 38 receives the optical signal from the base device 2, converts it into an electrical signal, extracts the information on the threshold value, and sends it to the determination unit 35 via the power calculation unit 34. Output.
  • the determination unit 35 internally stores the input threshold value, and when a new threshold value is input, updates the stored threshold value with the new threshold value.
  • FIG. 6 is a flow chart showing the operation of the second handset 3b.
  • the processing of the second child device 3b shown in FIG. 6 will be referred to as threshold value setting processing.
  • the threshold value is set by the host device 1 or the master device 2 (S21)
  • the second slave device 3b receives and demodulates it by the wired interface unit 38 (S22). 4 (S23)
  • the power value is compared with the threshold value demodulated in step S22, and the operation of the wireless power supply device 6 is turned on or off.
  • the operation of the second handset 3b is performed.
  • the threshold preset in the child device 3 can be arbitrarily changed by the host device 1.
  • the number of wireless power supply devices 6 that supply power according to the area can be changed. It is possible to limit and save power. Specifically, by setting the threshold value of a specific wireless power supply device 6 to an extremely large value, the power supply operation of that wireless power supply device 6 is turned off, and the number of wireless power supply devices 6 can be limited.
  • FIG. 7 is an explanatory diagram showing the configuration of the third handset 3b.
  • the same reference numerals are assigned to the same parts as those of the first child device 3a and the second child device 3b, and the description thereof will be omitted.
  • a modulation unit 39 that performs conversion for transmitting the calculated power value, and an optical cable 10
  • a wired interface section 37 is newly provided for transmitting an optical signal including a power value.
  • the radio processing unit 33 demodulates the received signal, the power calculation unit 34 calculates the power value, and the modulation unit 39 converts the power value into a transmission code suitable for optical transmission. Then, the power value is transmitted from the wired interface unit 37 to the base unit 2 via the optical cable 10 and further to the host device 1 .
  • the host device 1 receives and aggregates the power values from the plurality of child devices 3, and considers the power consumption of the entire system, etc., and determines an appropriate threshold for the third child device 3c, which is the source of the power values. determines and transmits the threshold value to the third slave device 3c. For example, when the total power value from the plurality of slave stations 3 is close to the upper limit of the power supply of the power supply device 5, the host device 1 sets a high threshold value to limit the power supply operation, and inversely If it is determined that there is a margin in the amount of power supply, the threshold is set lower. That is, the host device 1 adjusts the overall power supply amount by appropriately changing the threshold value of each child device 3c according to the magnitude of the power value from the child device 3c.
  • the host device 1 acquires the received power values of the plurality of child devices 3c, comprehensively judges from various points of view, and determines the power of each child device 3c. Since the threshold value is set, fine adjustment of the wireless power supply can be performed according to the movement of the person.
  • the host device 1 can determine the threshold value of each handset 3 so as to set a time zone for wireless power supply operation for each area.
  • the threshold value can be changed as needed based on the power value in the changed layout to enable efficient operation.
  • FIG. 8 is a flow chart showing the operation of the third handset 3c.
  • the radio processing section 33 demodulates (S31)
  • the power calculation section 34 calculates the power value (S32)
  • the modulation section 39 modulates the power value.
  • the signal is converted into an optical signal by the wired interface unit 37 and sent to the base unit 2 via the optical cable 10 (S33).
  • Base device 2 collects the power values from a plurality of child devices 3 and periodically transmits them to host device 1, for example, and host device 1 determines the threshold value of each child device 3 based on a comprehensive judgment. Then, the third slave device 3c shifts to the threshold setting process shown in FIG. 6 (S34), and uses the threshold received from the host device 1 to control on/off of the power supply operation of the wireless power supply device 6. . Thus, the operation of the third handset 3c is performed.
  • FIG. 9 is an explanatory diagram showing a configuration in which the wireless power supply unit is incorporated in the slave device power supply device.
  • FIG. 9 shows the configuration of the first child device 3a as the child device 3, second to fourth child devices may be used.
  • a wireless power supply unit 71 for wirelessly supplying power to the mobile device 4 is provided inside the slave device power supply device 7 that supplies power to the slave device 3 . Then, similarly to the above-described first to third child devices, the determination unit 35 of the child device 3 compares the power value of the received signal with the threshold, determines whether wireless power supply is on or off, and outputs an instruction. Then, the power supply device control unit 36 controls on/off of the operation of the wireless power supply unit 71 based on the instruction.
  • the power supply to the child device 3 and the power supply to the wireless power supply section 71 are shared, so that the configuration can be greatly simplified.
  • FIG. 10 is an explanatory diagram showing the configuration of the fourth handset 3d.
  • the fourth handset 3d turns on/off the power supply operation of the wireless power supply device 6 based on the value of the received power.
  • the directivity (beam angle, beam width) of the wireless power feeding device 6 is controlled autonomously, and the directivity of the feeding radiation in the wireless power feeding device 6 is controlled accordingly.
  • the fourth slave unit 3d has an antenna unit and an antenna for controlling the directivity of the feeding radiation in any one of the first slave unit 3a, the second slave unit 3b, and the third slave unit 3d. Added configuration. In order to simplify the drawing, FIG. Only the configuration for controlling the directivity of the feed radiation is described.
  • the wireless processing main unit 31 includes a wireless processing unit 33, a correction unit 42, a sensor unit 43, a forming parameter selection unit 44, a demodulation unit 41, a modulation unit 39, a wired interface unit 37, and a wired interface unit 38. and are built-in.
  • the wireless processing unit 33 has functions of A/D conversion, D/A conversion, and RF signal conversion, receives a signal from the base unit 2 via the wired interface unit 37, performs demodulation processing, and receives the signal.
  • the modulated signal is output to the antenna unit 32 and transmitted to the mobile station 4 .
  • the wireless processing unit 33 demodulates and receives a signal from the mobile unit 4 input from the antenna unit 32 , further modulates the signal, and transmits the signal from the wired interface unit 37 to the base unit 2 .
  • the radio processing unit 33 forms beams of directional antennas according to parameters set by the forming parameter selection unit 44 .
  • the correction unit 42 corrects the beam direction and width in the vertical direction based on the detection data from the sensor unit 43, and corrects the beam direction and width in the horizontal direction based on the instruction data from the host device 1.
  • width is corrected.
  • the direction and width of the beam in the vertical direction may be corrected by the data of the instruction from the host device 1 .
  • the correction unit 42 corrects the parameters using the correction values, and the corrected parameters are selected by the forming parameter selection unit 44 and set in the radio processing unit 33 to realize the correction of the direction and width of the beam. be. Therefore, the correction unit 42 corrects the forming pattern, and the forming parameter selection unit 44 selects the forming pattern.
  • the sensor unit 43 is a triaxial sensor (acceleration sensor), and detects information on the tilt and installation direction of the child device 3d. Also, the sensor unit 43 includes a temperature sensor to detect whether or not the temperature has reached a specific threshold value or higher. The detection result of this temperature sensor is also related to the beam direction control of the directional antenna. Details will be described later.
  • the correction unit 42 acquires a correction value for correcting the beam angle and width in the vertical direction based on information on the inclination and installation direction from the sensor unit 43 .
  • the correction unit 42 has a registry (correspondence table), and outputs a correction value corresponding to the information on the tilt and installation direction. That is, the correcting unit 42 adds the correction value obtained from the registry to the beam forming parameters for forming the beam direction of the directional antenna.
  • the tilt is a numerical value that indicates the degree of tilt (tilt state) of the child device 3d
  • the installation direction indicates the direction in which the antenna obtained from the installation position such as the ceiling, wall, or floor is directed. That is, the correction unit 42 adds the correction value to the beamforming parameter and outputs the added forming parameter to the forming parameter selection unit 44 .
  • the correction unit 42 does not control the beam direction of the directional antenna and makes it omnidirectional. For example, when heat builds up near the ceiling and the temperature rises above a specific threshold, directivity control that consumes heat is stopped to prevent heat from rising.
  • the forming parameter selection unit 44 selects parameters for wireless beam forming (beam forming) and sets the selected parameters in the wireless processing unit 33 .
  • the demodulation unit 41 inputs the setting parameters from the host device 1 from the wired interface unit 38 , demodulates them, and outputs them to the correction unit 42 .
  • the modulation unit 39 modulates the setting parameter, converts it into a transmission code for the host device 1 , and outputs the transmission code to the wired interface unit 37 .
  • the wireless power supply device 6 connected to the fourth handset 3d varies the beam direction and beam width of the power supply beam emitted from the wireless power supply antenna 61 based on the input forming parameters. be.
  • the fourth slave unit 3d it is also possible to transmit setting parameters for beamforming from the host device 1 and correct the forming parameters. 41 demodulates and updates the registry value of the correction unit 42 with the demodulated setting parameters.
  • the wireless processing unit 33 forms beams for the antenna unit 32 according to the set forming parameters
  • the wireless power supply device 6 forms power supply beams for the wireless power supply antenna 61 according to the set forming parameters.
  • the fourth slave unit 3d can form an appropriate beam for wireless power supply according to the installation location (ceiling, wall, floor, etc.), and wireless power supply can be performed more efficiently. is.
  • the power value is calculated by demodulating the wireless signal from the mobile device 4 and compared with the threshold value. 6 may be performed.
  • wireless communication is performed with a plurality of mobile devices 4, and a child device 3 connected to a master device 2 serving as an aggregation device is provided.
  • wireless power supply device 6 detects the received power of the mobile device 4, and controls the power supply in the wireless power supply device 6, autonomously turning on/off the wireless power supply according to the movement of the mobile device 4.
  • the present invention is suitable for a radio communication system that can efficiently perform wireless power feeding in an antenna extension radio system.

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

Abstract

Le problème décrit par la présente invention concerne un système de communication sans fil qui permet une alimentation sans fil efficace dans un système sans fil à extension d'antenne.　La solution selon l'invention concerne un dispositif esclave (3) qui effectue une communication sans fil avec une pluralité de dispositifs mobiles (4) et qui se connecte à un dispositif maître (2) servant de dispositif de consolidation. Dans le système de communication sans fil, le dispositif esclave (3) se connecte à un dispositif d'alimentation sans fil (6) qui alimente sans fil les dispositifs mobiles (4), détecte la puissance de réception des dispositifs mobiles (4), et effectue une commande pour activer/désactiver une opération d'alimentation du dispositif d'alimentation sans fil (6) en fonction de l'amplitude de la puissance de réception.
PCT/JP2022/026905 2021-08-24 2022-07-07 Système de radiocommunication WO2023026698A1 (fr)

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JP2021-136725 2021-08-24

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Citations (5)

* Cited by examiner, † Cited by third party
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