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WO2018199455A1 - Procédé de mise en réseau sous-marin au moyen d'un système de communication par champ magnétique - Google Patents

Procédé de mise en réseau sous-marin au moyen d'un système de communication par champ magnétique Download PDF

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Publication number
WO2018199455A1
WO2018199455A1 PCT/KR2018/002213 KR2018002213W WO2018199455A1 WO 2018199455 A1 WO2018199455 A1 WO 2018199455A1 KR 2018002213 W KR2018002213 W KR 2018002213W WO 2018199455 A1 WO2018199455 A1 WO 2018199455A1
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WO
WIPO (PCT)
Prior art keywords
node
mobile relay
magnetic field
relay nodes
coil
Prior art date
Application number
PCT/KR2018/002213
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English (en)
Korean (ko)
Inventor
신요안
김광열
오선애
Original Assignee
숭실대학교산학협력단
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 숭실대학교산학협력단 filed Critical 숭실대학교산학협력단
Publication of WO2018199455A1 publication Critical patent/WO2018199455A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
    • H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy

Definitions

  • the present invention relates to an underwater network method using a magnetic field communication system, and more particularly, to an underwater network method using a magnetic field communication system that forms an underwater network through a mobile relay node in an underwater environment and provides a long-distance high-speed transmission technology. will be.
  • Magnetic field communication technology is a wireless communication system using a magnetic field region is a technology for transmitting information using a magnetic field generated over time in extreme environments, such as metal, underwater, underground, building collapse obstacles.
  • Magnetic field communication technology monitors ground conditions such as ground subsidence, ground movement monitoring, leaks and damage of underground facilities such as water pipes, sewer pipes, power pipes, communication pipes, gas pipes, oil pipelines, etc. It can monitor the condition of cracks and vibrations and is suitable for next generation wireless communication system.
  • the magnetic field communication technology is the most suitable communication technology among the data transmission methods for the underwater network, compared with the data transmission method using optical, electromagnetic and acoustic, which are general underwater networks.
  • the magnetic field communication technology in the underwater environment has the advantage that the propagation speed of the magnetic field communication is faster than the propagation speed of the sound, and the propagation delay time is shortened.
  • the magnetic field signal is not visible to the eyes like the optical signal or the ear like the acoustic signal. Because of the same characteristics, it can be used underwater for security and military purposes.
  • magnetic induction coils can be probed into small underwater robots or submersibles that are easy to move, and are much cheaper than antennas of other underwater communication technologies, making it possible to economically construct large scale underwater sensor networks.
  • Underwater magnetic field communication is more affected by propagation path loss than multipath fading and channel distortion.
  • the path loss of the magnetic field communication is caused by insufficient energy from the transmitting end to the receiving end.
  • the present invention provides an underwater network method using a magnetic field communication system that forms an underwater network through a mobile underwater sensor in an underwater environment and provides a long-distance high speed transmission technology.
  • the magnetic field communication server is a transmitting node, a receiving node and a plurality of Obtaining location information of a mobile relay node, selecting N mobile relay nodes (N is a natural number of 1 or more) required for relaying using distance information between the transmitting node and the receiving node, and the N mobile relay nodes Setting a position of the, moving the N mobile relay nodes to the set position, aligning coil axes of the transmitting node, the receiving node and the plurality of the mobile relay nodes, and the transmitting node through the selected mobile relay node. Transmitting data to the receiving node.
  • the acquiring of the position information may include positions of the plurality of mobile relay nodes using absolute position coordinates of the receiving node and the transmitting node and coil X-axis, coil Y-axis, and coil Z-axis values of the receiving node and the transmitting node. Can be obtained.
  • the magnetic field communication server receives feedback information on the strength and magnetic field distortion of the received signal between each adjacent node, and each node corrects the coil axis in consideration of the feedback information. It further comprises the step.
  • the coil axis of each node may be corrected using the acceleration and the rotation direction of the coil according to the flow velocity of the water in which the nodes are located.
  • the plurality of mobile relay nodes move to the derived position or correct the axis of the coil of each node, and then, when the current of the coil antenna is induced through the magnetic field generated from the adjacent nodes, the plurality of mobile relay nodes perform a search process on the induced current. Selects the largest signal and passes the selected largest signal to another selected mobile relay node or receiving node.
  • the present invention it is possible to stably provide long-distance and high-speed transmission by acquiring a waveguide transmission scheme in magnetic field communication, which has an advantage of shortening propagation delay time and can build a network at low cost.
  • FIG. 1 is a diagram showing an underwater network structure including a mobile relay node according to an embodiment of the present invention.
  • FIG. 2 is a view for explaining a magnetic field communication system using a mobile relay node according to an embodiment of the present invention.
  • FIG. 3 is a flowchart illustrating an underwater network method using a magnetic field communication system according to an exemplary embodiment of the present invention.
  • FIG. 4 is a view for explaining a three-dimensional magnetic field positioning technique according to an embodiment of the present invention.
  • FIG. 5 is a view for explaining a magnetic field transmission method using a mobile relay node according to an embodiment of the present invention.
  • FIG. 6 is a diagram illustrating a coil rotation and a magnetic waveguide transmission technique of a node in a magnetic interference environment according to an exemplary embodiment of the present invention.
  • FIGS. 1 and 2 an underwater network of a magnetic field communication system using a mobile relay node proposed in an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
  • FIG. 1 is a view showing an underwater network structure including a mobile relay node according to an embodiment of the present invention
  • Figure 2 is a view for explaining a magnetic field communication system using a mobile relay node according to an embodiment of the present invention.
  • the magnetic field communication system accurately captures and collects information on phenomena occurring in the water, and accurately stores a large amount of data from the sensor to a surface station on the ground. In order to transmit fast and fast, it performs magnetic field communication using relay node.
  • the position of the mobile relay node in the water is accurately determined. High precision magnetic field positioning technology.
  • the magnetic field communication system obtains each position of the plurality of mobile relay nodes using magnetic field positioning technology, and arranges the plurality of mobile relay nodes using the obtained position information. It performs magnetic field communication between the transmitting node, the plurality of mobile relay nodes and the receiving node.
  • the magnetic field communication system Since the nodes in the aquatic environment are affected by water currents and changes in water temperature and water pressure, the magnetic field communication system according to the embodiment of the present invention has a strong magnetic induction in the aquatic environment in order to obtain the position information of the plurality of mobile relay nodes. A method based high precision location estimation technique is used.
  • the magnetic field communication technology using a plurality of mobile relay nodes and the high-precision magnetic field positioning technology are organically and complementarily integrated with each other to enable long-distance high-speed transmission based on location information.
  • FIG. 3 is a flowchart illustrating an underwater network method using a magnetic field communication system according to an embodiment of the present invention
  • FIG. 4 is a view for explaining a 3D magnetic field positioning technique according to an embodiment of the present invention
  • 5 is a view for explaining a magnetic field transmission method using a mobile relay node according to an embodiment of the present invention.
  • the magnetic field communication server communicates with a transmitting node, a receiving node, and a mobile relay node, and each node has an ID which can be individually identified.
  • the transmitting node and the receiving node are nodes that know absolute position information
  • the mobile relay node may be attached to a mobile robot or submersible that can move, and may be represented as a separate sensor node that is free to move.
  • the magnetic field communication server acquires location information of the transmitting node 100, the receiving node 300, and the plurality of mobile relay nodes 200 (S310).
  • the magnetic field communication server uses the absolute position coordinates of the transmitting node 100 and the receiving node 300 to position the three-dimensional magnetic field.
  • the location information of the plurality of mobile relay nodes 200 may be obtained through the technique.
  • the magnetic field communication server acquires the positions of the plurality of mobile relay nodes using absolute position coordinates of the receiving node and the transmitting node and coil X-axis, coil Y-axis, and coil Z-axis values of the receiving node and the transmitting node.
  • the magnetic field communication server is a mobile relay through the ⁇ value of the coil X axis (Coil X), the ⁇ of the coil Y axis (Coil Y), the Y value of the coil Z axis (Coil Z) based on the absolute position coordinates.
  • the position of the node (X r , Y r , Z r ) can be obtained, and the distance d from the absolute position coordinate can be estimated.
  • the magnetic field communication server selects N mobile relay nodes (N is one or more natural numbers) required for relaying using distance information between the transmitting node 100 and the receiving node 300 (S320).
  • the magnetic field communication server estimates the distance using the absolute position coordinates of the transmitting node 100 and the receiving node 300, and the number of mobile relay nodes (N) capable of performing the most efficient magnetic field communication corresponding to the estimated distance. Select.
  • the magnetic field communication server may select N mobile relay nodes that are located closest to the transmitting node 100 and the receiving node 300 and do not perform magnetic field communication using the position information of the mobile relay node.
  • the magnetic field communication server sets the positions of the N mobile relay nodes 200, moves the N mobile relay nodes 200 to the set position, the transmitting node 100, the receiving node 100, and the plurality of mobile nodes. Align the axes of the relay node 200 (S330).
  • the magnetic field communication server may set a position of the mobile relay node 200 for performing waveguide transmission (relay transmission) and move each selected mobile relay node 200 to a non-overlapping position.
  • the magnetic field communication server may derive the positions of the N mobile relay nodes and set the derived positions so as not to cause mutual interference with other communication lines performing direct field communication.
  • the magnetic field communication server may align the coil axes of the transmitting node 100 and the receiving node 300 with the coil axis of the mobile relay node 200 when the mobile relay node 200 moves to the set position.
  • the transmitting node 100 transmits data to the receiving node 300 through the selected N mobile relay nodes 200 (S340).
  • the transmitting node 100 converts the underwater information collected from the mounted sensors into a digital signal suitable for transmission, and modulates the converted digital signal using a technique selected according to the channel environment.
  • the transmitting node 100 generates a magnetic field while passing the coil antenna of the transmitting node 100 by carrying the modulated signal on an alternating current. At this time, a current is induced to the coil antenna of the mobile relay node 200 in the magnetic field region of the transmitting node 100 to transmit a modulated signal.
  • the plurality of mobile relay nodes 200 move to the derived position or correct the axis of the coil of each node, and when the current of the coil antenna is induced through the magnetic field generated from the adjacent nodes, the search process is performed in the induced current.
  • the signal with the largest intensity is selected.
  • the plurality of mobile relay nodes 200 may transmit the selected largest signal to another selected mobile relay node 200 or the receiving node 300.
  • the magnetic field communication system may perform direct communication without selecting the mobile relay node according to the distance information between the receiving node 100 and the transmitting node 300.
  • the magnetic field communication system performs direct communication between a sensor node with a MI transceiver 100 or a root node with a MI transceiver and a connection to the above ground.
  • the magnetic field communication system uses a plurality of mobile relay nodes MI relay 200 between the transmitting node 100 and the receiving node 300 as shown in FIG. Communication can be performed.
  • the magnetic field communication system performs direct communication between the transmitting node 100 and the receiving node 300 in consideration of a condition of the underwater environment or the mobile relay node 200. It is possible to change and set to perform the waveguide communication using.
  • the magnetic field communication server may receive feedback information about the strength of the received signal and the magnetic field distortion between each adjacent node. In consideration of the feedback information, the transmitting node 100, the plurality of mobile relay nodes 200, and the receiving node 300 may correct the respective coil axes.
  • the transmitting node 100, the plurality of mobile relay nodes 200, and the receiving node 300 may correct the coil axis of each node by using the acceleration and the rotation direction of the coil according to the flow velocity of the water in which the nodes are located. have.
  • FIG. 6 is a diagram illustrating a coil rotation and a magnetic waveguide transmission technique of a node in a magnetic interference environment according to an exemplary embodiment of the present invention.
  • FIG. 6 (a) is an exemplary view showing the rotation and polarization angle of the coil of the node
  • Figure 6 (b) is an exemplary view showing a situation in which interference caused by the change of the axis of the mobile relay node in the magnetic field interference environment.
  • each node of the magnetic field communication system is continuously moved and rotated by the flow of water, unlike on the ground.
  • the rotational acceleration is proportional to the flow velocity and the direction of rotation is influenced by the flow velocity direction.
  • the magnetic field direction of the transmitter node is connected to the magnetic field direction of the receiver node, so that the magnetic field communication is performed smoothly.
  • the coil axes of the transmitter node and the receiver node are rotated so that the magnetic field direction is shifted.
  • FIG. 6 (b) shows a situation in which the performance of the magnetic field communication system is degraded by rotating the shaft of the coil as shown in FIG. 6 (a) in the waveguide transmission using the mobile relay node 200 (relay coil) proposed by the present invention. It is shown.
  • the second and third it can be seen that the interference occurred due to the rotation of the coil axis of the mobile relay node 200 (relay coil).
  • the magnetic field communication system performs normal magnetic field communication by correcting the coil axis of a corresponding node when the strength of a received signal decreases above a threshold or detects a situation about magnetic field distortion. Feedback information can be used to make this possible.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Near-Field Transmission Systems (AREA)
  • Power Engineering (AREA)

Abstract

La présente invention concerne un procédé de mise en réseau sous-marin au moyen d'un système de communication par champ magnétique. Le procédé de mise en réseau sous-marin au moyen d'un système de communication par champ magnétique comprenant une pluralité de nœuds relais mobiles et un serveur de communication par champ magnétique comprend : une étape dans laquelle le serveur de communication par champ magnétique obtient des informations de localisation concernant un nœud émetteur, un nœud récepteur et la pluralité de nœuds relais mobiles ; une étape de sélection de N (nombre naturel supérieur ou égal à 1) nœuds relais mobiles nécessaires pour le relais, sur la base d'informations sur la distance entre le nœud émetteur et le nœud récepteur ; une étape consistant à configurer les emplacements des N nœuds relais mobiles, à déplacer les N nœuds relais mobiles vers les emplacements configurés, et à aligner les axes de bobine du nœud émetteur, du nœud récepteur et de la pluralité de nœuds relais mobiles ; et une étape dans laquelle le nœud émetteur transmet des données au nœud récepteur par l'intermédiaire des nœuds relais mobiles sélectionnés. Selon la présente invention, une transmission longue distance et grande vitesse peut être assurée de manière stable en adoptant un schéma de transmission de guide d'ondes dans des communications par champ magnétique, ce qui réduit avantageusement le temps de retard de propagation et permet l'établissement d'un réseau à coûts perdus. De plus, les performances des communications par champ magnétique peuvent être améliorées grâce à l'utilisation efficace de nœuds relais mobiles, par la fusion des informations de localisation obtenues au moyen d'une technique de positionnement par champ magnétique et par le schéma de transmission de guide d'ondes.
PCT/KR2018/002213 2017-04-25 2018-02-22 Procédé de mise en réseau sous-marin au moyen d'un système de communication par champ magnétique WO2018199455A1 (fr)

Applications Claiming Priority (2)

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KR10-2017-0053001 2017-04-25
KR1020170053001A KR102185969B1 (ko) 2017-04-25 2017-04-25 자기장 통신 시스템을 이용한 수중 네트워크 방법

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110336619A (zh) * 2019-07-05 2019-10-15 李利 一种海上移动通信设备

Citations (5)

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US20120170421A1 (en) * 2006-08-03 2012-07-05 Mark Rhodes Underwater communications
KR101192414B1 (ko) * 2011-01-28 2012-10-17 한국과학기술원 자기장 통신을 위한 신호전송 방법, 송신코일장치, 수신코일 장치, 및 자기장 통신 시스템
KR101223184B1 (ko) * 2012-09-14 2013-01-21 (주)선영종합엔지니어링 등거리 관측을 이용한 수준측량 시스템
US20140233398A1 (en) * 2011-09-30 2014-08-21 Orange Multi-hop routing protocol
US20150195033A1 (en) * 2014-01-03 2015-07-09 Telefonaktiebolaget L M Ericsson (Publ) Selection of cooperative strategies for relay nodes in a wireless network to enhance data throughput

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KR101004364B1 (ko) * 2008-09-12 2010-12-28 강릉원주대학교산학협력단 수중 무선통신을 위한 통신 장치 및 그 방법
KR101293951B1 (ko) * 2011-11-30 2013-08-07 강릉원주대학교산학협력단 무선 센서 네트워크에서 센서노드를 관리하는 장치 및 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120170421A1 (en) * 2006-08-03 2012-07-05 Mark Rhodes Underwater communications
KR101192414B1 (ko) * 2011-01-28 2012-10-17 한국과학기술원 자기장 통신을 위한 신호전송 방법, 송신코일장치, 수신코일 장치, 및 자기장 통신 시스템
US20140233398A1 (en) * 2011-09-30 2014-08-21 Orange Multi-hop routing protocol
KR101223184B1 (ko) * 2012-09-14 2013-01-21 (주)선영종합엔지니어링 등거리 관측을 이용한 수준측량 시스템
US20150195033A1 (en) * 2014-01-03 2015-07-09 Telefonaktiebolaget L M Ericsson (Publ) Selection of cooperative strategies for relay nodes in a wireless network to enhance data throughput

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110336619A (zh) * 2019-07-05 2019-10-15 李利 一种海上移动通信设备
CN110336619B (zh) * 2019-07-05 2021-10-08 中国人民解放军海军大连舰艇学院 一种海上移动通信设备

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KR20180119353A (ko) 2018-11-02
KR102185969B1 (ko) 2020-12-02

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