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WO2018199454A1 - Terminal hybride passif/décodeur de relais de distribution pour des communications sous-marines à champ magnétique, et procédé de relais associé - Google Patents

Terminal hybride passif/décodeur de relais de distribution pour des communications sous-marines à champ magnétique, et procédé de relais associé Download PDF

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Publication number
WO2018199454A1
WO2018199454A1 PCT/KR2018/002212 KR2018002212W WO2018199454A1 WO 2018199454 A1 WO2018199454 A1 WO 2018199454A1 KR 2018002212 W KR2018002212 W KR 2018002212W WO 2018199454 A1 WO2018199454 A1 WO 2018199454A1
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WO
WIPO (PCT)
Prior art keywords
signal
time slot
terminal
during
receiving
Prior art date
Application number
PCT/KR2018/002212
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English (en)
Korean (ko)
Inventor
신요안
오선애
Original Assignee
숭실대학교산학협력단
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Application filed by 숭실대학교산학협력단 filed Critical 숭실대학교산학협력단
Publication of WO2018199454A1 publication Critical patent/WO2018199454A1/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
    • H04B5/26—Inductive coupling using coils
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
    • H04B5/48—Transceivers

Definitions

  • the present invention relates to a hybrid passive-decryption relay terminal for submerged magnetic field communication and a relay method thereof, and more particularly, to improve communication performance while extending transmission distance of underwater magnetic field communication using passive-decryption relay terminal.
  • the present invention relates to a hybrid passive-decryption relay terminal for improving underwater magnetic field communication and a relay method thereof.
  • Underwater sensor network collects various kinds of underwater information through underwater sensor and transmits it to the ground through underwater base station.
  • Underwater information includes marine climate observation and ecological environment analysis, shipping industry information such as ship's route and territorial sea defense. It can be used in various areas such as the defense field.
  • data transmission for the underwater sensor network uses optical, electromagnetic, and acoustic techniques.However, in order to improve communication performance due to poor channel conditions in the underwater environment, magnetic induction is required. Magnetic field communication technology using Induction is most suitable.
  • Magnetic field communication technology is a transmission technology that is very interested in all environments, such as ground, underground, and underwater.
  • the antenna size can be efficiently reduced and long distance high speed transmission is possible, and the antenna price is cheaper than other communication technologies. Therefore, it is evaluated as an economical technology.
  • underwater magnetic field communication is highly affected by propagation path loss.
  • the path loss of the magnetic field communication is not actually lost but is not sufficiently transmitted from the transmitting end to the receiving end, the transmission and reception power decreases when the transmission distance becomes far.
  • the path loss of magnetic field communication is affected by operating frequency, transmission distance, coil antenna size, number of wire windings, coaxial nature of the transmitting and receiving coil antenna, and underwater environmental conditions. When propagated, eddy currents are generated, which causes problems with insufficient energy.
  • the background technology of the present invention is disclosed in Korean Patent Registration No. 10-1284151 (July 10, 2013).
  • the present invention provides a hybrid passive-decryption relay terminal and a relay method for underwater magnetic field communication, which extends the transmission distance of underwater magnetic field communication and improves communication performance by using the passive-decryption relay terminal. To provide.
  • the hybrid passive-decryption relay terminal is a signal induced magnetically from the transmitting terminal Receiving, transmitting the received signal to a receiving terminal during a first time slot and simultaneously storing the received signal in a buffer, and decoding and modulating a signal stored in the buffer during a second time slot to transmit a modulated signal to the receiving terminal. Transmitting.
  • the current induced by the coil antenna of the transmitting terminal may be received through the coil antenna in a magnetic field induction manner.
  • an AC voltage to the coil antenna can be controlled to transmit a modulated signal.
  • the method may further include generating information on the strength and magnetic field distortion of the pilot signal and correcting an axis of the coil antenna in response to the generated information.
  • Receiving a self-derived signal from the transmitting terminal receiving a signal from the transmitting terminal during the nth time slot, receiving a signal from the transmitting terminal during the n + 1 time slot, the nth time And comparing the signal received during the slot with the signal received during the n + 1th time slot, and requesting retransmission of the signal to the transmitting terminal when it is determined that the signal is not the same signal.
  • a hybrid passive-decryption relay terminal receives a signal received from a transmitting terminal, the self-induced signal, and stores the received signal in a buffer during a first time slot, the buffer during a second time slot And a transmitter for decoding and modulating a signal stored in the transmitter, and a transmitter for transmitting the received signal to the receiving terminal during the first time slot and transmitting the modulated signal to the receiving terminal during the second time slot.
  • the present invention it is possible to improve the performance of the magnetic field communication in the underwater environment by extending the transmission distance of the magnetic field communication in the dynamically changing underwater environment and reducing the path loss.
  • 1 is an exemplary view showing the operation of a hybrid passive-decryption relay terminal according to an embodiment of the present invention.
  • FIG. 2 is a block diagram showing a hybrid passive-decryption relay terminal according to an embodiment of the present invention.
  • FIG. 3 is a flowchart illustrating a relay method of a hybrid passive-decryption relay terminal according to an embodiment of the present invention.
  • FIG. 4 is a view for explaining the step S310 of FIG. 3 in detail.
  • 5 and 6 are diagrams for comparing the path loss between the transmission method and the direct transmission method according to an embodiment of the present invention.
  • FIG. 1 is an exemplary view showing the operation of a hybrid passive-decryption relay terminal according to an embodiment of the present invention.
  • FIG. 1A illustrates a case where one hybrid passive passive decoding relay terminal 200 is used
  • FIG. 1B illustrates a plurality of hybrid passive passive decryption relay terminals 200-1 and 200-2. In the case of using.
  • the underwater magnetic field communication is a transmission terminal 100, hybrid passive-decryption relay terminal (200: 200-1,200-2) and It includes a receiving terminal 300.
  • the transmitting terminal 100 represents a terminal that collects underwater information through an underwater sensor and transmits a signal including the collected underwater information
  • a hybrid passive-decryption relay terminal ( 200 denotes a terminal positioned between the transmitting terminal 100 and the receiving terminal 300 and serving as a relay to extend a transmission distance of a signal transmitted by the transmitting terminal 100.
  • the receiving terminal 300 finally indicates a destination terminal to which the transmitting terminal 100 intends to transmit a signal.
  • the transmitting terminal 100 applies an alternating voltage to the coil antenna, a magnetic field is formed, and the formed magnetic field induces a current to the coil antenna of the adjacent hybrid passive-decryption relay terminal 200.
  • the hybrid passive-decryption relay terminal 200 selects a signal having the greatest intensity through a search process from the induced current and transmits the signal to the transmitting terminal 100 during the first time slot # 1.
  • the same method transmits the received signal to the receiving terminal 300 in a self-induction method.
  • the hybrid passive-decryption relay terminal 200 decodes, modulates, and modulates a signal received during the second time slot # 2 to the receiving terminal 300.
  • the receiving terminal 300 receives a signal from the hybrid passive type-decoding relay terminal 200 in the first time slot # 1 and the second time slot # 2.
  • Figure 1 (b) uses a plurality of hybrid passive-decryption relay terminal (200-1, 200-2) to extend the transmission distance of the magnetic field communication than (a).
  • hybrid passive-decryption relay terminals 200 Although two hybrid passive-decryption relay terminals 200 are shown in FIG. 1B, the number of hybrid passive-decryption relay terminals 200 may be adjusted according to the underwater communication environment.
  • the passive-decryption relay terminal 200-2 may receive a second time slot (# 1) and a second time slot from the hybrid passive-decryption relay terminal 200-1. If a signal is received during 2), it is determined whether the signal is the same by comparing the signals received in the first time slot # 1 and the second time slot # 2. If the hybrid passive-decryption relay terminal 200-2 determines that the two signals are the same, the hybrid passive-decryption relay terminal 200-2 sends a signal to the third time slot # 3 through the same process as the hybrid passive-decryption relay terminal 200-1. The signal is transmitted to the receiving terminal 300, the signal is decoded and modulated in the fourth time slot # 4, and the modulated signal is transmitted to the receiving terminal 300.
  • the magnetic field communication may transmit and transmit a signal using at least one hybrid passive-decryption relay terminal 200 according to a distance to be transmitted.
  • a hybrid passive-decryption relay terminal 200 for selectively transmitting a signal to an adjacent terminal or decoding and modulating the signal by using a power source will be described in detail with reference to FIG. 2.
  • FIG. 2 is a block diagram showing a hybrid passive-decryption relay terminal according to an embodiment of the present invention.
  • the hybrid passive-decryption relay terminal 200 may include a receiver 210, a controller 220, and a transmitter 230, and may further include an axis corrector 240.
  • the receiver 210 receives a magnetically induced signal from the transmitting terminal 100 through a coil antenna. That is, when a signal having the greatest intensity is selected through a search process in the current derived from the transmitting terminal 100, the selected signal is estimated as a received signal.
  • the reception unit 210 may compare the signal received during the nth time slot and the signal received during the n + 1th time slot and request a retransmission to the transmitting terminal 100 when the signal is not the same signal.
  • the controller 220 stores the received signal in a buffer (not shown) during the first time slot, and decodes and modulates the signal stored in the buffer during the second time slot.
  • controller 220 controls the connection with the power supply line to block the power supply line during the first time slot so that the received signal is transmitted as it is using magnetic field communication (Passive relay), and the power supply during the second time slot.
  • the supply line may be connected to decode and modulate the received signal to transmit a modulated signal (DF: Decode and Forward relay).
  • the transmitter 230 transmits the received signal to the receiving terminal 300 during the first time slot and transmits the modulated signal to the receiving terminal 300 during the second time slot through a coil antenna.
  • the axis correction unit 240 may generate information on the strength and magnetic field distortion of the pilot signal, and correct the axis of the coil antenna in response to the generated information.
  • the axis correction unit 240 may correct the axis of the coil antenna by using a correction value corresponding to the information on the strength and magnetic field distortion of the pilot signal stored in a separate database.
  • FIG. 3 is a flowchart illustrating a relay method of a hybrid passive-decryption relay terminal according to an exemplary embodiment of the present invention
  • FIG. 4 is a view for explaining step S310 of FIG. 3 in detail.
  • the hybrid passive type-decryption relay terminal 200 receives a magnetically induced signal from the transmitting terminal 100 (S310).
  • the hybrid passive-decryption relay terminal 200 may receive the current induced by the coil antenna of the transmitting terminal 100 through the coil antenna in a magnetic field induction manner.
  • the hybrid passive-decryption relay terminal 200 selects the largest signal from the induced current and estimates the received signal.
  • a magnetic field induction method is applied to the first time slot # 1 and the second time slot # 2.
  • Receive the signal That is, the hybrid passive-decryption relay terminal 200-2 receives a signal from the hybrid passive-decryption relay terminal 200-1 to the first time slot # 1 and the second time slot # 2.
  • the hybrid passive-decryption relay terminal 200-1 will be referred to as a transmission terminal 100, and the hybrid passive-decryption transmission will be described.
  • the relay terminal 200-2 is referred to as a hybrid passive-decryption relay terminal 200.
  • the hybrid passive-decryption relay terminal 200 receives a signal from the transmitting terminal 100 during an nth time slot (S311).
  • the hybrid passive-decryption relay terminal 200 receives a signal from the transmitting terminal 100 during the n + 1th time slot (S312).
  • the signal received in step S311 and the signal received in step S312 are the same signal, but the signal received during the nth time slot is simply a received signal, and the signal received during the n + 1th time slot is the transmitting terminal 100. Denotes the decoded and modulated signal.
  • the hybrid passive-decryption relay terminal 200 compares whether the signal received during the nth time slot and the signal received during the n + 1th time slot are the same (S313).
  • the hybrid passive-decryption relay terminal 200 may determine whether the received signal and the received signal are the same during each time slot.
  • the hybrid passive-decryption relay terminal 200 requests a retransmission of the signal to the transmitting terminal 100 (S314).
  • the hybrid passive-decryption relay terminal 200 proceeds from step S310 to step S320.
  • the hybrid passive-decryption relay terminal 200 transmits the received signal to the receiving terminal 300 during the first time slot and simultaneously stores the received signal in the buffer (S320).
  • the hybrid passive-decryption relay terminal 200 cuts off the power supply line and transfers the received signal directly to the receiving terminal 300 through the magnetic field induction method.
  • the hybrid passive-decryption relay terminal 200 temporarily stores the received signal in a buffer to compensate for the time difference between the first time slot and the second time slot.
  • the hybrid passive-decryption relay terminal 200 decodes and modulates the signal stored in the buffer during the second time slot and transmits the modulated signal to the receiving terminal 300 (S330).
  • the hybrid passive-decryption relay terminal 200 connects the power supply line during the second time slot to decode the received signal and modulates the decoded signal.
  • the hybrid passive-decoding relay terminal 200 modulates in the same manner as the first received signal, the signal transmitted during the first time slot and the signal transmitted during the second time slot are substantially the same.
  • the hybrid passive-decryption relay terminal 200 transmits a modulated signal by applying an AC voltage to the coil antenna by connecting a power supply line during the second time slot.
  • the hybrid passive-decryption relay terminal 200 may generate information on the strength and magnetic field distortion of the pilot signal.
  • the hybrid passive-decryption relay terminal 200 may correct the axis of the coil antenna to move and rotate in response to the information on the strength of the pilot signal and the magnetic field distortion.
  • 5 and 6 are diagrams for comparing the path loss between the transmission method and the direct transmission method according to an embodiment of the present invention.
  • FIG. 5A illustrates a case where the axes of the coils between a transmitter terminal and a receiver coil that perform direct communication are aligned in a line with each other.
  • FIG. 5A Under the same conditions as in FIG. 5A, the coaxial property of the coil antenna is broken and thus not disposed in a straight line (displaced).
  • FIG. 5 is a waveguide transmission method through the hybrid passive-decryption relay terminal according to an embodiment of the present invention, the coaxial property of the coil antenna is destroyed so that the axis of the coil of each terminal is not arranged in a straight line Indicated if replaced.
  • 5A and 5B show that the distance between the transmitting terminal and the receiving terminal is r, the distance between the transmitting terminal and the hybrid passive-decryption relay terminal is r / 2 in FIG. Set the position of the hybrid passive-decryption relay terminal and perform simulation.
  • FIG. 6 a graph showing the path loss for each frequency band of the simulation result is shown in FIG. 6, and the result in the condition of FIG. 5 (a) is represented by a straight line (directly-MI; horizontally deployed).
  • the result in the condition of (b) of (b) is shown as a red square (direct-MI; displaced), the result in the condition (c) of Figure 5 is shown as a black circle (MI-waveguide; displaced).
  • the embodiment of the present invention by extending the transmission distance of the magnetic field communication in the dynamically changing underwater environment and reducing the path loss, it is possible to improve the performance of the magnetic field communication in the underwater environment.

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

Abstract

La présente invention concerne un terminal hybride passif/décodeur de relais de distribution pour des communications sous-marines à champ magnétique et un procédé de relais associé. Le procédé de relais utilisant le terminal hybride passif/décodeur de relais de distribution pour des communications sous-marines à champ magnétique comprend : une étape dans laquelle le terminal hybride passif/décodeur de relais de distribution reçoit un signal induit magnétiquement provenant d'un terminal de transmission ; une étape consistant à délivrer le signal reçu à un terminal de réception et à le stocker simultanément dans une mémoire tampon pendant un premier intervalle de temps ; et une étape consistant à décoder et moduler le signal stocké dans la mémoire tampon et à transmettre le signal modulé au terminal de réception pendant un second intervalle de temps. La présente invention permet d'améliorer les performances de communication à champ magnétique dans un environnement sous-marin par la réduction de l'affaiblissement de propagation ainsi que l'augmentation de la distance de transmission des communications à champ magnétique dans l'environnement sous-marin à changement dynamique.
PCT/KR2018/002212 2017-04-25 2018-02-22 Terminal hybride passif/décodeur de relais de distribution pour des communications sous-marines à champ magnétique, et procédé de relais associé WO2018199454A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2017-0052788 2017-04-25
KR1020170052788A KR101945102B1 (ko) 2017-04-25 2017-04-25 수중 자기장 통신을 위한 하이브리드 수동형-복호전달 중계 단말 및 그 중계 방법

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WO2018199454A1 true WO2018199454A1 (fr) 2018-11-01

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070111492A (ko) * 2005-02-22 2007-11-21 마츠시타 덴끼 산교 가부시키가이샤 무선 통신 방법, 중계국 장치 및 무선 수신　장치
US20120170417A1 (en) * 2006-08-03 2012-07-05 Mark Rhodes Underwater communications
US8520505B1 (en) * 2012-05-14 2013-08-27 Empire Technology Development, Llc Combined hard/soft relay forwarding for hybrid-automatic repeat request (ARQ) exploitation
US20140341584A1 (en) * 2013-03-15 2014-11-20 Fairfield Industries Incorporated High-bandwidth underwater data communication system
US20160069674A1 (en) * 2014-09-08 2016-03-10 The Government Of The United States, As Represented By The Secretary Of The Army Underwater Signal Conversion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070111492A (ko) * 2005-02-22 2007-11-21 마츠시타 덴끼 산교 가부시키가이샤 무선 통신 방법, 중계국 장치 및 무선 수신　장치
US20120170417A1 (en) * 2006-08-03 2012-07-05 Mark Rhodes Underwater communications
US8520505B1 (en) * 2012-05-14 2013-08-27 Empire Technology Development, Llc Combined hard/soft relay forwarding for hybrid-automatic repeat request (ARQ) exploitation
US20140341584A1 (en) * 2013-03-15 2014-11-20 Fairfield Industries Incorporated High-bandwidth underwater data communication system
US20160069674A1 (en) * 2014-09-08 2016-03-10 The Government Of The United States, As Represented By The Secretary Of The Army Underwater Signal Conversion

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KR20180119270A (ko) 2018-11-02
KR101945102B1 (ko) 2019-02-01

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