WO2021229681A1 - Système de commande de communication, dispositif de commande de communication, procédé de commande de communication et programme de commande de communication - Google Patents

Système de commande de communication, dispositif de commande de communication, procédé de commande de communication et programme de commande de communication Download PDF

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Publication number
WO2021229681A1
WO2021229681A1 PCT/JP2020/018958 JP2020018958W WO2021229681A1 WO 2021229681 A1 WO2021229681 A1 WO 2021229681A1 JP 2020018958 W JP2020018958 W JP 2020018958W WO 2021229681 A1 WO2021229681 A1 WO 2021229681A1
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WO
WIPO (PCT)
Prior art keywords
communication control
area
antenna
radio station
radio
Prior art date
Application number
PCT/JP2020/018958
Other languages
English (en)
Japanese (ja)
Inventor
陸 大宮
友規 村上
智明 小川
泰司 鷹取
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.)
Filing date
Publication date
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 JP2022522134A priority Critical patent/JP7315098B2/ja
Priority to PCT/JP2020/018958 priority patent/WO2021229681A1/fr
Publication of WO2021229681A1 publication Critical patent/WO2021229681A1/fr

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    • 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
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a communication control method, a communication control device, a communication control system, and a communication control program.
  • Non-Patent Document 1 a frequency sharing technique in which a spatiotemporally free frequency is dynamically and secondarily used to increase the radio capacity (for example, Non-Patent Document 1). reference).
  • multiple radio stations repeatedly use radio waves of the same frequency in different spaces. More specifically, by increasing the directivity of the antenna or providing geographical separation for each radio station, the desired received power and the interfering received power are separated (with a margin for reception). ) Is possible.
  • the radio station that uses the frequency secondarily does not interfere with the primary user station of the frequency.
  • a radio station that uses a frequency secondarily has a frequency that is lower than a predetermined value to secure a margin for interference, or limits the output of radio waves. Use next.
  • the frequency secondary user station grasps the position of the primary user station and the directivity of the antenna in order to obtain a margin against radio wave interference with the primary user station.
  • the location of a non-moving radio station (radio transmitting station) installed with a radio station license is as shown in the radio station license. However, since the position of the moving radio station is indicated by the moving range, the exact position cannot be grasped from the radio station license.
  • the direction of the directional antenna cannot be checked from the registered information. Further, since the position of the wireless terminal (wireless receiving station) is not registered in the first place, the position cannot be checked from the registered information or the like.
  • An object of the present invention is to provide a communication control method, a communication control device, a communication control system, and a communication control program that enable efficient sharing of frequencies even when a radio station moves.
  • the communication control method is based on an image taken by one or more cameras that shoots a moving radio station equipped with an antenna at a predetermined position, and a shooting position taken by the camera.
  • the first calculation step of calculating the emission area where the antenna emits a predetermined level of radio waves and in the interference area where another antenna provided by another radio station emits a predetermined level of radio waves, the emission area is within the emission area. It is characterized by including a second calculation step of calculating a shareable area of radio waves in which interference by radio waves is less than a predetermined value.
  • the communication control device is set to an image taken by one or more cameras that take a picture of a moving radio station equipped with an antenna at a predetermined position, and a picture taken by the camera.
  • the emission area is relative to the first calculation unit that calculates the emission area in which the antenna emits a predetermined level of radio waves, and the interfered area in which another antenna provided in another radio station emits a predetermined level of radio waves. It is characterized by having a second calculation unit for calculating a shareable area of radio waves in which interference by radio waves is less than a predetermined value.
  • the communication control system includes one or more cameras that capture a moving radio station equipped with an antenna at a predetermined position, an image captured by the camera, and an image captured by the camera.
  • the first calculation unit that calculates the emission area where the antenna emits a predetermined level of radio waves based on the shooting position, and the interfered area where another antenna provided by another radio station emits a predetermined level of radio waves.
  • a second calculation unit that calculates a commonable area of radio waves in which the interference of radio waves in the emission area is less than a predetermined value, and a setting unit that sets a range occupied by the emission area based on the commonable area. It is characterized by having.
  • FIG. 1 is a diagram illustrating an outline of a communication control system 1 according to an embodiment.
  • the communication control system 1 is a system having, for example, a plurality of cameras 10, a communication control device 20, and a plurality of mobile radio stations 30-1 to 30-3.
  • the camera 10 is, for example, a fixed-point camera that shoots a moving image (image) at a predetermined position.
  • the shooting position of the camera 10 is determined by predetermining the latitude, longitude, height, and the like in which the cameras 10 are installed.
  • the camera 10 may have a fixed shooting direction, or the shooting direction and position may be variable within a predetermined range.
  • the communication control device 20 receives a moving image taken by each of the plurality of cameras 10 and transmits a control signal to the radio stations 30-1 to 30-3 based on the result of processing the received moving image. Specific configuration examples and operation examples of the communication control device 20 will be described later with reference to FIG. 2 and the like.
  • the radio stations 30-1 to 30-3 are equipped with, for example, two antennas 300, and can be moved to an arbitrary position, and perform wireless communication with a wireless terminal (not shown).
  • the antenna 300 is, for example, a directional antenna, and emits a predetermined level of radio waves in a predetermined direction (three-dimensional direction).
  • the radio station 30-1 emits radio waves in different directions from each of the two antennas 300, and forms two emission regions A-1 in which the power of the radio waves is equal to or higher than a predetermined level.
  • radio station 30-2 forms two launch regions A-2
  • radio station 30-3 forms two launch regions A-3.
  • radio station 30 and the like when any one of a plurality of configurations such as radio stations 30-1 to 30-3 is not specified, it is simply abbreviated as radio station 30 and the like.
  • the communication control system 1 performs frequency sharing in which the same frequency is repeatedly used, for example. For example, it is assumed that radio waves having the same frequency are used in the launch areas A-1 to the launch areas A-3. Further, since each of the radio stations 30 moves, the emission area A is formed in an area (shared area) other than the area (interfered area) in which radio waves of the same frequency are used in advance.
  • the radio station 30-2 approaches the radio station 30-1 forming the two launch areas A-1, the radio station 30-1 is set as the primary user station and the radio station 30-2 is set as the primary user station. It will be a secondary usage station.
  • the radio station 30-2 has two emission areas A- in an area (shared area) other than the two emission areas A-1 (interfered area) based on the control signal transmitted from the communication control device 20. By forming 2, frequency sharing is performed.
  • FIG. 2 is a functional block diagram illustrating an outline of the functions of the communication control device 20 according to the embodiment.
  • the communication control device 20 includes a communication I / F 200, an image acquisition unit 202, a position specifying unit 204, a direction specifying unit 206, a characteristic specifying unit 208, a first calculation unit 210, and a second calculation unit 212.
  • the communication I / F 200 is a communication interface that receives, for example, a moving image taken by each camera 10 and outputs the moving image to the image acquisition unit 202.
  • the image acquisition unit 202 acquires an image that changes from moment to moment from each frame of the moving image received by the communication I / F 200, and transfers the acquired image to the position specifying unit 204, the direction specifying unit 206, and the characteristic specifying unit 208. Output.
  • FIG. 3 is a diagram schematically showing an example of an image acquired by the image acquisition unit 202.
  • the communication control device 20 performs the processing described later using the image 40. ..
  • the image acquired by the image acquisition unit 202 may be accompanied by imaging position information indicating the imaging position of the camera 10.
  • the position specifying unit 204 (FIG. 2) performs predetermined processing using the shooting position information indicating the shooting position of the camera 10 and the image 40 input from the image acquisition unit 202, and the radio station included in the image 40.
  • the positions of the antennas 300 of the 30 and the radio station 30 are specified, and the position information indicating the specified positions is output to the first calculation unit 210.
  • the position specifying unit 204 applies image recognition accompanied by machine learning, for example. Further, when a plurality of radio stations 30 are photographed in one image 40, the position specifying unit 204 may specify the position of each of the radio stations 30 from one image 40. Further, the position specifying unit 204 may use the image 40 from each camera 10 and process the point cloud data to specify the positions of the radio station 30 and the antenna 300.
  • the direction specifying unit 206 performs predetermined processing using the shooting position information indicating the shooting position of the camera 10 and the image 40 input from the image acquisition unit 202, and the antenna 300 of the radio station 30 included in the image 40.
  • the direction of each directivity is specified, and the direction information indicating the specified direction is output to the first calculation unit 210.
  • FIG. 4 is a diagram illustrating the position information specified by the position specifying unit 204 and the direction information specified by the direction specifying unit 206.
  • the position specifying unit 204 and the direction specifying unit 206 refer to the radio stations 30-1 to 30-3 with respect to the latitude, longitude, and height of the antenna 300 (one antenna 300 in FIG. 4). And specify the direction of directivity.
  • the directivity direction of the antenna 300 is shown using an azimuth angle of 360 ° with the north direction as 0 °. Further, the directivity of the antenna 300 may be separately specified in a three-dimensional direction including the height direction (or elevation angle).
  • the characteristic specifying unit 208 extracts an image of the antenna 300 from the image 40 input from the image acquisition unit 202, for example, and specifies the type of the antenna by comparison with reference image data indicating the type of the antenna. That is, the characteristic specifying unit 208 identifies the characteristics (for example, frequency band and method) of the antenna 300 by specifying the type of the antenna 300 captured in the image 40, and the characteristic information indicating the specified characteristics is the first. 1 Output to the calculation unit 210 and the setting unit 214.
  • the position specifying unit 204, the direction specifying unit 206, and the characteristic specifying unit 208 may be configured to gradually improve the accuracy of identification by arbitrary image processing, machine learning, or the like.
  • the first calculation unit 210 calculates and calculates the emission regions A-1 to A-3 formed by each of the antennas 300 as individual three-dimensional regions based on the above-mentioned position information, direction information, and characteristic information.
  • the areas A-1 to A-3 are output to the second calculation unit 212.
  • the second calculation unit 212 shares the radio wave in which the interference by the radio wave in the new emission region is less than the predetermined value with respect to the interfered region in which the other antenna 300 provided in the other radio station 30 emits the radio wave of the predetermined level.
  • the possible area is calculated, and the calculation result is output to the setting unit 214.
  • the second calculation unit 212 may launch a new firing region (for example, firing) with respect to two firing regions A-1 (interfered regions) in which the two antennas 300 included in the radio station 30-1 emit radio waves of a predetermined level. Calculate the shareable area of the radio wave in the area A-2) where the interference by the radio wave is less than the predetermined value.
  • a new firing region for example, firing
  • A-1 interfered regions
  • the area not included in the two emission areas A-1 is a shareable area in which radio waves of the same frequency can be shared with the radio station 30-1 at the same time. ..
  • the setting unit 214 sets the range occupied by each of the emission areas A-1 to A-3 so that the interference of radio waves with the interfered area is less than a predetermined value. Then, the setting information indicating the setting is output to the transmission / reception unit 216.
  • the emission region A when the radio station 30-1 is the primary frequency utilization station and the radio station 30-2 is the secondary frequency utilization station, the emission region A so as not to overlap the emission region A-1. Set the range occupied by -2.
  • the setting unit 214 limits the output of the radio wave emitted by the radio station 30-2 so that the radio wave in the emission area A-2 does not interfere with the radio wave in the emission area A-1.
  • a setting is made to urge the radio station 30-2 to be separated from the radio station 30-1 by a predetermined distance or more.
  • the setting unit 214 may be set in any way as long as the radio stations 30-1 to 30-3 are set to efficiently share frequencies. That is, the setting unit 214 may make settings based on any of the distance between the radio stations 30, the output power of each of the antennas 300, the directivity of each of the antennas 300, and the like. For example, when the radio station 30 has a function of changing the directivity direction of the antenna 300, the setting unit 214 may make a setting to change the directivity direction of the antenna 300.
  • the transmission / reception unit 216 has a function of performing bidirectional wireless communication with each radio station 30 via, for example, an antenna 218. For example, the transmission / reception unit 216 transmits the setting information input from the setting unit 214 to each radio station 30 via the antenna 218.
  • FIG. 5 is a flowchart showing an operation example of the communication control device 20 according to the embodiment.
  • the communication control device 20 attempts to detect the radio station 30 in the moving image (image 40, etc.) taken by the camera 10 (S100).
  • the communication control device 20 proceeds to the process of S104 when the radio station 30 can be detected (S102: Yes), and ends the process when the radio station 30 cannot be detected (S102: No).
  • the position specifying unit 204 When the position specifying unit 204 can calculate the distance and direction from the shooting position by the camera 10 to the radio station 30 (S104: Yes), the position specifying unit 204 identifies the position of the radio station 30 based on the calculated distance and direction (S104: Yes). S106). Further, when the position specifying unit 204 cannot calculate the distance and direction from the shooting position by the camera 10 to the radio station 30 (S102: No), the position specifying unit 204 sets the shooting position by the camera 10 to the radio station 30 (or antenna 300). (S108).
  • the direction specifying unit 206 when the direction specifying unit 206 can detect the direction of the antenna 300 (S110: Yes), the direction specifying unit 206 specifies the direction of the directivity of the antenna 300 (S112), and when the direction of the antenna 300 cannot be detected (S112). S110: No) ends the process.
  • the characteristic specifying unit 208 identifies the characteristics of the antenna 300 when the type of the antenna 300 can be detected (S114: Yes), and cannot detect the type of the antenna 300 (S114: No). Ends the process.
  • the first calculation unit 210 calculates the emission regions A-1 to A-3 formed by each of the antennas 300 of each radio station 30 as individual three-dimensional regions (S118).
  • the second calculation unit 212 calculates a shareable area of radio waves in which the interference by radio waves in the new emission area is less than a predetermined value with respect to the interfered area (S120).
  • the setting unit 214 sets the range occupied by each of the emission regions A-1 to A-3 so that the interference of the radio waves with respect to the interfered region is less than a predetermined value (S122).
  • the communication control device 20 calculates the emission region in which the antenna 300 emits the radio wave of a predetermined level, and calculates the commonable region of the radio wave in which the interference with the interfered region is less than the predetermined value. Allows efficient sharing of frequencies even when moving.
  • Each function of the communication control device 20 may be partially or wholly configured by hardware, or may be configured as a program executed by a processor such as a CPU.
  • the communication control device 20 can be realized by using a computer and a program, and the program can be recorded on a storage medium or provided through a network.
  • FIG. 6 is a diagram showing a hardware configuration example of the communication control device 20 according to the embodiment.
  • the communication control device 20 for example, an input unit 50, an output unit 51, a communication unit 52, a CPU 53, a memory 54, and an HDD 55 are connected via a bus 56, and have a function as a computer. Further, the communication control device 20 is configured to be able to input / output data to / from the storage medium 57.
  • the input unit 50 is, for example, a keyboard, a mouse, or the like.
  • the output unit 51 is a display device such as a display.
  • the communication unit 52 is, for example, a wireless and wired network interface.
  • the CPU 53 controls each part constituting the communication control device 20 and performs the above-mentioned processing.
  • the memory 54 and the HDD 55 store data.
  • the memory 54 and the HDD 55 store data such as the above-mentioned position information, direction information, and characteristic information. Therefore, the communication control device 20 may be configured to perform processing using the information stored in the memory 54 and the HDD 55 in advance.
  • the storage medium 57 can store a communication control program or the like that executes a function of the communication control device 20.
  • the architecture constituting the communication control device 20 is not limited to the example shown in FIG. Further, the camera 10 and the radio station 30 may also have the same configuration as the communication control device 20.

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

Abstract

L'invention concerne un procédé de commande de communication selon un mode de réalisation qui est caractérisé en ce qu'il comprend : une première étape de calcul pour calculer une région d'émission dans laquelle une antenne émet des ondes radio d'un niveau prescrit, sur la base d'images capturées à une position prédéterminée par une ou plusieurs caméras qui effectuent une imagerie d'une station sans fil mobile munie d'une antenne, et les positions d'imagerie des caméras ; et une seconde étape de calcul pour calculer une région partageable d'ondes radio, dans laquelle une interférence provoquée par des ondes radio à l'intérieur de la région d'émission est inférieure à une valeur prescrite, par rapport à une région soumise à une interférence dans laquelle une autre antenne fournie à une autre station sans fil émet des ondes radio d'un niveau prescrit.
PCT/JP2020/018958 2020-05-12 2020-05-12 Système de commande de communication, dispositif de commande de communication, procédé de commande de communication et programme de commande de communication WO2021229681A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2022522134A JP7315098B2 (ja) 2020-05-12 2020-05-12 通信制御方法、通信制御装置、通信制御システム、及び通信制御プログラム
PCT/JP2020/018958 WO2021229681A1 (fr) 2020-05-12 2020-05-12 Système de commande de communication, dispositif de commande de communication, procédé de commande de communication et programme de commande de communication

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PCT/JP2020/018958 WO2021229681A1 (fr) 2020-05-12 2020-05-12 Système de commande de communication, dispositif de commande de communication, procédé de commande de communication et programme de commande de communication

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008108146A (ja) * 2006-10-26 2008-05-08 Toshiba Corp Ｅｔｃ通信監視装置及びｅｔｃ通信監視方法
JP2009225132A (ja) * 2008-03-17 2009-10-01 Nec Corp 画像表示システム、画像表示方法、及び、プログラム
JP2018142941A (ja) * 2017-02-28 2018-09-13 日本電信電話株式会社 無線通信装置及び無線通信方法
WO2019229985A1 (fr) * 2018-06-01 2019-12-05 三菱電機株式会社 Système d'affichage et terminal d'affichage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008108146A (ja) * 2006-10-26 2008-05-08 Toshiba Corp Ｅｔｃ通信監視装置及びｅｔｃ通信監視方法
JP2009225132A (ja) * 2008-03-17 2009-10-01 Nec Corp 画像表示システム、画像表示方法、及び、プログラム
JP2018142941A (ja) * 2017-02-28 2018-09-13 日本電信電話株式会社 無線通信装置及び無線通信方法
WO2019229985A1 (fr) * 2018-06-01 2019-12-05 三菱電機株式会社 Système d'affichage et terminal d'affichage

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JP7315098B2 (ja) 2023-07-26

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