WO2024013813A1 - Système de communication sans fil, dispositif de commande, et procédé de contrôle - Google Patents

Système de communication sans fil, dispositif de commande, et procédé de contrôle Download PDF

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Publication number
WO2024013813A1
WO2024013813A1 PCT/JP2022/027287 JP2022027287W WO2024013813A1 WO 2024013813 A1 WO2024013813 A1 WO 2024013813A1 JP 2022027287 W JP2022027287 W JP 2022027287W WO 2024013813 A1 WO2024013813 A1 WO 2024013813A1
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WO
WIPO (PCT)
Prior art keywords
wireless communication
base station
information indicating
terminal
control device
Prior art date
Application number
PCT/JP2022/027287
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English (en)
Japanese (ja)
Inventor
俊朗 中平
亮太 椎名
辰彦 岩國
拓人 新井
Original Assignee
日本電信電話株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 日本電信電話株式会社 filed Critical 日本電信電話株式会社
Priority to PCT/JP2022/027287 priority Critical patent/WO2024013813A1/fr
Publication of WO2024013813A1 publication Critical patent/WO2024013813A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks

Definitions

  • the present invention relates to a wireless communication system, a control device, and a control method.
  • Non-Patent Document 1 discloses a wireless sensing method for detecting objects using machine learning.
  • Non-Patent Document 2 discloses a wireless sensing method for detecting birds and animals by analyzing fluctuations in wireless LAN radio waves.
  • the disclosed technology aims to facilitate the simplification of equipment for wireless sensing.
  • the disclosed technology is a wireless communication system including a terminal and a base station that transmit and receive signals to each other by optical wireless communication, and a control device that controls the base station, the control device controlling communication quality from the base station.
  • an information acquisition unit that acquires information indicating the communication quality; and a shielding detection unit that detects shielding that affects optical wireless communication between the base station and the terminal or other device based on the information indicating the communication quality.
  • This is a wireless communication system comprising:
  • FIG. 1 is a diagram illustrating an example of a configuration of a wireless communication system according to Example 1 of an embodiment of the present invention.
  • 1 is a diagram illustrating an example of a functional configuration of a control device according to Example 1 of an embodiment of the present invention
  • FIG. 1 is a diagram illustrating an example of a functional configuration of a base station according to Example 1 of the embodiment of the present invention
  • FIG. It is a flow chart which shows an example of the flow of detection processing concerning Example 1 of an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of the configuration of a wireless communication system according to Example 2 of the embodiment of the present invention. It is a figure showing an example of the functional composition of the control device concerning Example 2 of an embodiment of the present invention.
  • 12 is a flowchart illustrating an example of the flow of detection processing according to Example 2 of the embodiment of the present invention.
  • 1 is a diagram showing an example of a hardware configuration of a computer.
  • Example 1 and Example 2 will be described as specific examples of this embodiment.
  • Example 1 In this embodiment, an example will be described in which a visible light type optical wireless communication device is used for sensing purposes.
  • FIG. 1 is a diagram illustrating an example of the configuration of a wireless communication system according to Example 1 of the embodiment of the present invention.
  • the wireless communication system 1 includes a control device 10, a base station 20, a terminal 30, and a sensor 40.
  • the control device 10 is a device that controls optical wireless communication between the base station 20, the terminal 30, the sensor 40, etc.
  • the control device 10 is communicably connected to the base station 20 via a wired or wireless communication line.
  • the control device 10 acquires information indicating the quality of optical wireless communication from the base station 20, and detects the presence or absence of shielding that affects the optical wireless communication between the base station 20, the terminal 30, the sensor 40, and the like.
  • the base station 20 is a device that performs visible light optical wireless communication with the terminal 30, sensor 40, etc.
  • the base station 20 estimates the quality of optical wireless communication with the terminal 30, sensor 40, etc., and transmits information indicating the quality of optical wireless communication to the control device 10 based on the estimation result. Furthermore, the base station 20 transmits information indicating the position, direction, etc. of the terminal 30 to the control device 10.
  • the terminal 30 is a device that is used by a user and functions as a mobile station that moves with the user.
  • the communication state between the terminal 30 and the base station 20 changes depending on the position, direction, etc. of the terminal 30.
  • the sensor 40 is installed at a fixed location, and periodically transmits detected information to the base station 20 via optical wireless communication, for example.
  • FIG. 2 is a diagram illustrating an example of the functional configuration of a control device according to Example 1 of the embodiment of the present invention.
  • the control device 10 includes a communication section 11, an external input/output section 12, an arithmetic processing section 13, a storage section 14, an information acquisition section 15, and a shielding detection section 16.
  • the communication unit 11 transmits and receives information to and from the base station 20. Specifically, the communication unit 11 receives information indicating the quality of optical wireless communication and information indicating the position, direction, etc. of the terminal 30 from the base station 20. Furthermore, the communication unit 11 may transmit information indicating the shielding detected by the shielding detection unit 16 to the base station 20.
  • the external input/output unit 12 inputs data necessary for the calculation performed by the calculation processing unit 13 to the calculation processing unit 13, or outputs data as a result of the calculation performed by the calculation processing unit 13. Specifically, the external input/output unit 12 inputs the information received by the communication unit 11 to the arithmetic processing unit 13. Further, the external input/output unit 12 may output information indicating the shielding detected by the shielding detector 16.
  • the calculation processing unit 13 performs calculations based on the input data. Specifically, the calculation processing unit 13 performs calculations based on information indicating the quality of optical wireless communication and information indicating the position, direction, etc. of the terminal 30, and calculates a value for determining the presence or absence of shielding.
  • the storage unit 14 stores data necessary for calculation. Specifically, the storage unit 14 stores information indicating the quality of optical wireless communication, information indicating shielding detected by the shielding detection unit 16, and the like.
  • the information acquisition unit 15 acquires information indicating the quality of optical wireless communication and information indicating the position, direction, etc. of the terminal 30 from the base station 20 via the communication unit 11, external input/output unit 12, etc.
  • the shielding detection unit 16 detects shielding between the base station 20 and the terminal 30 or sensor 40. Specifically, the shielding detection unit 16 determines the presence or absence of shielding based on the calculation results by the calculation processing unit 13 regarding information indicating the quality of optical wireless communication and information indicating the position, direction, etc. of the terminal 30.
  • the shielding detection unit 16 determines that there is shielding when the quality of optical wireless communication has decreased based on information indicating the quality of optical wireless communication. You may. Furthermore, regarding communication between the base station 20 and the terminal 30, the shielding detection unit 16 detects the position of the terminal 30, based on information indicating the quality of optical wireless communication and information indicating the position, direction, etc. of the terminal 30. It may be determined that there is shielding when the quality of optical wireless communication is lower than the quality estimated from the direction or the like.
  • FIG. 3 is a diagram illustrating an example of the functional configuration of a base station according to Example 1 of the embodiment of the present invention.
  • the base station 20 includes a communication section 21 , an optical wireless communication quality estimation section 22 , a signal processing section 23 , and an optical wireless communication section 24 .
  • the communication unit 21 transmits and receives information to and from the control device 10. Specifically, the communication unit 21 transmits information indicating the quality of optical wireless communication and information indicating the position, direction, etc. of the terminal 30 to the control device 10. Further, the communication unit 21 may receive information indicating the shielding detected by the shielding detection unit 16 from the control device 10.
  • the optical wireless communication quality estimation unit 22 estimates the quality of optical wireless communication with the terminal 30 or the sensor 40 and sends information indicating the estimated quality of optical wireless communication to the control device 10 via the communication unit 21. Send.
  • the optical wireless communication quality estimating unit 22 may estimate the communication quality based on a change in the communication state, such as the failure of regularly transmitted and received data or the occurrence of a packet error.
  • the signal processing unit 23 processes signals transmitted and received in optical wireless communication with the terminal 30 or sensor 40.
  • the optical wireless communication unit 24 performs optical wireless communication with the terminal 30 or the sensor 40.
  • FIG. 4 is a flowchart showing an example of the flow of detection processing according to Example 1 of the embodiment of the present invention.
  • the control device 10 executes the detection process periodically or in response to a user's operation.
  • the information acquisition unit 15 acquires information indicating communication quality from the base station 20 (step S101).
  • the information acquisition unit 15 may acquire information indicating the position, direction, etc. of the terminal 30.
  • the shielding detection unit 16 detects shielding based on information indicating communication quality (step S102). Specifically, the shielding detection unit 16 detects shielding between the base station 20 and the sensor 40 when the communication quality has deteriorated. Further, the shielding detection unit 16 may detect shielding between the terminal 30 and the base station 20 based on information indicating communication quality and information indicating the position, direction, etc. of the terminal 30. In this case, the shielding detection unit 16 may determine that there is shielding when the quality of optical wireless communication is lower than the quality estimated from the position, direction, etc. of the terminal 30.
  • the communication unit 11 outputs information indicating the detected shielding to the base station 20 (step S103).
  • the base station 20 may schedule optical wireless communication based on the received information indicating shielding.
  • control device 10 detects shielding based on information indicating communication quality. This eliminates the need to add dedicated equipment for wireless sensing, making it easier to simplify the equipment and prevent increases in equipment costs.
  • Example 2 Example 2 will be described below with reference to the drawings.
  • the second embodiment differs from the first embodiment in that a heat source is detected in infrared optical wireless communication. Therefore, in the following explanation of the second embodiment, the differences from the first embodiment will be mainly explained, and parts having the same functional configuration as the first embodiment will be designated by the same reference numerals as used in the explanation of the first embodiment. A symbol is given and the explanation thereof is omitted.
  • FIG. 5 is a diagram illustrating an example of the configuration of a wireless communication system according to Example 2 of the embodiment of the present invention.
  • the wireless communication system 2 according to this embodiment includes a control device 10, a base station 20, and a sensor 40.
  • the base station 20 according to this embodiment communicates with the sensor 40 using infrared optical wireless communication.
  • the wireless communication system 2 detects the presence of a heat source by detecting infrared rays emitted by a heat source such as a person as noise.
  • FIG. 6 is a diagram illustrating an example of the functional configuration of a control device according to Example 2 of the embodiment of the present invention.
  • the control device 10 according to the present embodiment has a configuration in which a heat source detection section 17 is added to the control device 10 according to the first embodiment.
  • the information acquisition unit 15 acquires, for example, information indicating the signal-to-noise ratio of signals to be transmitted and received as information indicating communication quality from the base station 20.
  • the heat source detection unit 17 detects a heat source based on information indicating communication quality (for example, SN ratio). Specifically, if the heat source detection unit 17 determines that the noise floor has increased due to a decrease in the SN ratio or the like, it may determine that the heat source has approached.
  • information indicating communication quality for example, SN ratio
  • FIG. 7 is a flowchart showing an example of the flow of detection processing according to Example 2 of the embodiment of the present invention.
  • the information acquisition unit 15 acquires information indicating communication quality from the base station 20 (step S201).
  • the information acquisition unit 15 may acquire information indicating the SN ratio of signals transmitted and received by the base station 20.
  • the heat source detection unit 17 detects a heat source based on information indicating communication quality (step S202). Specifically, the heat source detection unit 17 detects a heat source near the base station 20 or the sensor 40 when the communication quality (for example, SN ratio) has decreased.
  • the communication quality for example, SN ratio
  • the communication unit 11 outputs information indicating the detected heat source to the base station 20 (step S203).
  • the base station 20 may schedule optical wireless communication based on the received information indicating the heat source.
  • control device 10 detects a heat source based on information indicating communication quality. This eliminates the need to add a dedicated device for detecting the heat source, making it easier to simplify the equipment and prevent increases in equipment costs.
  • wireless sensing at the terminal 30 may also be realized.
  • the control device 10 may acquire information indicating communication quality from the terminal 30 and detect shielding or a heat source based on the information.
  • control device 10 may perform information analysis using a combination of other wireless communication methods in addition to wireless devices using optical wireless communication methods.
  • the control device 10 may further estimate the communication quality using wireless LAN for a terminal determined to be shielded by optical wireless communication, and estimate the degree of shielding.
  • wireless sensing between a pair of base station 20 and a terminal 30 using an optical wireless communication system has been described, but wireless sensing between a base station 20 and a plurality of terminals 30 may also be performed.
  • the control device 10 may integrally analyze information collected from a plurality of base stations 20. For example, information indicating the communication quality not only between a certain base station 20 and a terminal 30 but also between a base station 20 and a terminal 30 adjacent to the base station 20 is acquired, and The magnitude of the shielding may be estimated.
  • the base station 20 may have a function of switching wireless communication methods or using them in combination as necessary. .
  • the base station 20 may switch to a wireless communication method suitable for wireless sensing in order to improve the accuracy of wireless sensing.
  • the base station 20 may select a communication method using infrared rays in order to detect the influence of thermal noise.
  • the base station 20 may select a communication method using infrared rays in order to detect the influence of thermal noise.
  • interference between the base stations 20 becomes a problem, so for example, multiple base stations 20 use infrared light in turn, and other base stations 20 use visible light.
  • the heat source may be periodically sensed while avoiding interference between the base stations 20.
  • control device 10, base station 20, or terminal 30 is realized by, for example, the hardware configuration of a computer 500 shown in FIG. 8.
  • the computer 500 shown in FIG. 8 includes an input device 501, a display device 502, an external I/F 503, a communication I/F 504, a processor 505, and a memory device 506. Each of these pieces of hardware is communicably connected via a bus 507.
  • the input device 501 is, for example, a keyboard, a mouse, a touch panel, or the like.
  • the display device 502 is, for example, a display. Note that the computer 500 does not need to have at least one of the input device 501 and the display device 502.
  • the external I/F 503 is an interface with an external device such as a recording medium 503a.
  • a recording medium 503a examples include a CD (Compact Disc), a DVD (Digital Versatile Disk), an SD memory card (Secure Digital memory card), and a USB (Universal Serial Bus) memory card.
  • the communication I/F 504 is an interface for performing data communication with other devices, equipment, systems, etc.
  • the processor 505 is, for example, various arithmetic devices such as a CPU.
  • the memory device 506 is, for example, various storage devices such as an HDD, an SSD, a RAM (Random Access Memory), a ROM (Read Only Memory), and a flash memory.
  • the control device 10, base station 20, or terminal 30 can implement the various processes described above by having the hardware configuration of the computer 500 shown in FIG.
  • the hardware configuration of the computer 500 shown in FIG. 8 is an example, and the computer 500 may have another hardware configuration.
  • computer 500 may have multiple processors 505 and multiple memory devices 506.
  • the control device 10, base station 20, or terminal 30 is realized by reading a program for causing the computer 500 to execute each of the above-described processes, and executing the process specified in the program.
  • the program may be recorded on the recording medium 503a or the like, or may be provided through a network.
  • a wireless communication system comprising a terminal and a base station that transmit and receive signals to each other by optical wireless communication, and a control device that controls the base station,
  • the control device includes: an information acquisition unit that acquires information indicating communication quality from the base station; a shielding detection unit that detects shielding that affects optical wireless communication between the base station and the terminal or other device based on information indicating the communication quality; Wireless communication system.
  • the information acquisition unit further acquires information indicating the position or direction of the terminal
  • the shielding detection unit detects shielding that affects optical wireless communication between the base station and the terminal based on information indicating the communication quality and information indicating the position or direction of the terminal.
  • the wireless communication system according to item 1. (Section 3)
  • the control device includes: further comprising a heat source detection unit that detects a heat source that affects optical wireless communication between the base station and the terminal or other device based on information indicating the communication quality;
  • Wireless communication system 10
  • Control device 11
  • Communication unit 12
  • External input/output unit 13
  • Arithmetic processing unit 14
  • Storage unit 15
  • Information acquisition unit 16
  • Shielding detection unit 17
  • Heat source detection unit 20
  • Base station 21
  • Communication unit 22
  • Optical wireless communication quality estimation unit 23
  • Signal processing Section 24
  • Optical wireless communication section 30
  • Sensor 500 Computer 501
  • Input device 502 Display device 503 External I/F 503a Recording medium

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

Abstract

La présente invention concerne un système de communication sans fil comprenant : un terminal et une station de base qui émettent et reçoivent des signaux à destination et en provenance l'un de l'autre par l'intermédiaire d'une communication sans fil optique; et un dispositif de commande qui commande la station de base, le dispositif de commande comprenant : une unité d'acquisition d'informations qui acquiert, à partir de la station de base, des informations indiquant une qualité de communication; et une unité de détection d'obstacle qui détecte, sur la base des informations indiquant la qualité de communication, un obstacle affectant une communication sans fil optique entre la station de base et le terminal ou un autre dispositif.
PCT/JP2022/027287 2022-07-11 2022-07-11 Système de communication sans fil, dispositif de commande, et procédé de contrôle WO2024013813A1 (fr)

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PCT/JP2022/027287 WO2024013813A1 (fr) 2022-07-11 2022-07-11 Système de communication sans fil, dispositif de commande, et procédé de contrôle

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Application Number Priority Date Filing Date Title
PCT/JP2022/027287 WO2024013813A1 (fr) 2022-07-11 2022-07-11 Système de communication sans fil, dispositif de commande, et procédé de contrôle

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000224189A (ja) * 1999-02-02 2000-08-11 Hittsu Kenkyusho:Kk 光伝送システム
WO2021002023A1 (fr) * 2019-07-04 2021-01-07 日本電信電話株式会社 Système de communication, terminal, procédé de communication, et programme
JP2022057511A (ja) * 2020-09-30 2022-04-11 パナソニック株式会社 無線環境推定システム、無線環境推定方法、端末装置、無線環境悪化要因示唆システム、無線環境悪化要因示唆方法、および基地局

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000224189A (ja) * 1999-02-02 2000-08-11 Hittsu Kenkyusho:Kk 光伝送システム
WO2021002023A1 (fr) * 2019-07-04 2021-01-07 日本電信電話株式会社 Système de communication, terminal, procédé de communication, et programme
JP2022057511A (ja) * 2020-09-30 2022-04-11 パナソニック株式会社 無線環境推定システム、無線環境推定方法、端末装置、無線環境悪化要因示唆システム、無線環境悪化要因示唆方法、および基地局

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