WO2021132773A1 - Method for realizing structure of visible light communication receiving unit for expanding reception range - Google Patents

Method for realizing structure of visible light communication receiving unit for expanding reception range Download PDF

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Publication number
WO2021132773A1
WO2021132773A1 PCT/KR2019/018600 KR2019018600W WO2021132773A1 WO 2021132773 A1 WO2021132773 A1 WO 2021132773A1 KR 2019018600 W KR2019018600 W KR 2019018600W WO 2021132773 A1 WO2021132773 A1 WO 2021132773A1
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visible light
light communication
receiving unit
communication receiving
photo diode
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PCT/KR2019/018600
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French (fr)
Korean (ko)
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차재상
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서울과학기술대학교 산학협력단
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Publication of WO2021132773A1 publication Critical patent/WO2021132773A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H04B10/116—Visible light communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/69—Electrical arrangements in the receiver

Definitions

  • the present invention is applicable to a light source that transmits data for Visible Light Communication (VLC) through high-speed blinking at least 200 times per second, such as LED lighting, and a Photo Diode used for data reception for visible light communication is applied It can be applied to extend the light reception range of the receiver.
  • VLC Visible Light Communication
  • the reception range of the existing reception module for visible light communication can be extended, and thus the user can freely select a location in the visible light communication-based wireless data transmission and reception.
  • the technology that enables visible light communication based on visible light sources such as existing LED lighting does not have the depletion and limitation of the frequency band that RF wireless communication technologies such as WiFi, Bluetooth, and Zigbee, which are the majority up to now, have, in fact. Even when a plurality of communication devices are used in the same space, it is possible to reduce the risk of communication failure due to duplication.
  • the visible light communication technology that uses LED lighting and Photo Diode as elements for transmission and reception can provide wide coverage by using a diffuser plate for the LED lighting on the transmitter side, whereas the Photo Diode on the receiver side Since the receivable range is different depending on the type, the communication range with the visible light communication transmitter is limited to a small scale.
  • the present invention by applying a structure such as an optical collecting plate to the receiving part for visible light communication using a photo diode, it is intended to overcome the limit of the existing photo diode's receiving part, and through this, the reception range limitation of the photo diode-based visible light communication reception module is solved. Therefore, it is intended to provide a wider wireless transmission/reception coverage to users.
  • the present invention for achieving the above object provides for a visible light communication receiver with an extended light reception range to which a plurality of Photo Diodes for transmitting data transmitted through a light source through high-speed blinking is applied.
  • the present invention was to additionally graft a lens structure that can widen the reception angle of visible light to the existing Photo Diode Array.
  • FIG. 1 is an overall perspective view of a structure of a visible light communication receiver for extending a reception range
  • FIG. 2 is an exemplary view of a lens structure of a light-concentrated receiver for extending a receiving range.
  • FIG. 3 is an exemplary view of the structure of a Photo Diode used in a receiver
  • FIG. 4 is an exemplary view of the structure of a coupling part for coupling a plurality of Photo Diodes.
  • FIG. 5 shows an exemplary structure of a received data receiving and processing unit.
  • a plurality of Photo Diodes are combined to form one receiver in order to expand the data reception coverage of the existing visible light communication receiver. Consists of a coupling unit 30. Also, by grafting a light-concentrated receiving unit lens 10 for extending the reception range on the front of the Photo Diode, it is possible to further expand the data reception coverage by widening the receiving angle of visible light, and finally, each Photo The data received through the diode are finally combined through the data receiving and processing unit 40 and processed into one received data.

Abstract

The present invention proposes a new structure of a visible light communication receiving unit for improving performance of a photo diode-based visible light communication receiving unit having different reception ranges depending on a device type and having a narrow coverage compared to transmission, whereas a visible light communication transmitting unit combined with a diffuser plate or the like has a wide transmission coverage. The unit cost of using a receiving unit can be largely reduced by using the proposed new visible light communication receiving unit.

Description

수신범위 확장을 위한 가시광통신 수신부 구조 구현 방법Visible light communication receiver structure implementation method to extend reception range
본 발명은 LED 조명 등 일반적으로 초당 200회 이상의 고속 점멸을 통해 가시광통신(VLC; Visible Light Communication)용 데이터를 송신하는 광원을 대상으로 적용 가능하며, 가시광통신용 데이터 수신을 위하여 사용되는 Photo Diode가 적용된 수신기의 광 수신범위를 확장하기 위하여 적용할 수 있다. The present invention is applicable to a light source that transmits data for Visible Light Communication (VLC) through high-speed blinking at least 200 times per second, such as LED lighting, and a Photo Diode used for data reception for visible light communication is applied It can be applied to extend the light reception range of the receiver.
이를 통해 기존에 사용되고 있는 가시광통신용 수신 모듈의 수신 가능 범위를 확장할 수 있으며, 이에 사용자는 가시광통신 기반의 무선 데이터 송수신에 있어서 보다 자유로운 위치 선정이 가능하다.Through this, the reception range of the existing reception module for visible light communication can be extended, and thus the user can freely select a location in the visible light communication-based wireless data transmission and reception.
기존의 LED 조명 등 가시광원을 기반으로 가시광통신을 가능케 하는 기술은 현재까지 절대 다수를 이루고 있는 WiFi, Bluetooth, Zigbee 등 RF 무선통신 기술이 가지고 있는 주파수 대역의 고갈 및 한계를 사실상 가지고 있지 않으며, 이는 같은 공간에서 다수의 통신 기기를 사용하여도 중복에 의한 통신 장애 등이 발생할 우려를 감소시킬 수 있다.The technology that enables visible light communication based on visible light sources such as existing LED lighting does not have the depletion and limitation of the frequency band that RF wireless communication technologies such as WiFi, Bluetooth, and Zigbee, which are the majority up to now, have, in fact. Even when a plurality of communication devices are used in the same space, it is possible to reduce the risk of communication failure due to duplication.
현재 전세계적으로 기존의 형광등, 백열등 등의 조명시스템 대비 월등한 전력 효율과 수명을 제공할 수 있는 LED 조명시스템으로의 전환이 정책적으로 권장되어 적극적으로 진행되었으며, 이에 가시광통신기술은 LED 조명시스템을 송신용으로 사용할 수 있어 기존의 인프라를 활용할 수 있는 장점을 보유하고 있다. At present, the transition to LED lighting systems that can provide superior power efficiency and lifespan compared to existing lighting systems such as fluorescent lamps and incandescent lamps has been actively promoted by policy recommendations worldwide. Since it can be used for transmission, it has the advantage of utilizing the existing infrastructure.
이러한 상황에서 LED 조명과 Photo Diode를 송신 및 수신용 소자로 사용하는 가시광통신 기술은 송신부 측의 LED 조명이 확산판 등을 활용하여 넓은 커버리지를 제공할 수 있는 반면, 수신부 측의 Photo Diode는 소자의 종류에 따라 수신 가능한 범위가 상이하여 이에 가시광통신용 송신부와의 통신 가능 범위가 소규모로 제한되는 등의 문제가 발생하고 있다.In this situation, the visible light communication technology that uses LED lighting and Photo Diode as elements for transmission and reception can provide wide coverage by using a diffuser plate for the LED lighting on the transmitter side, whereas the Photo Diode on the receiver side Since the receivable range is different depending on the type, the communication range with the visible light communication transmitter is limited to a small scale.
본 발명을 통하여, Photo Diode를 사용하는 가시광통신용 수신부에 광집판 등의 구조를 적용하여 기존의 Photo Diode의 수신부 한계를 극복하고자 하며, 이를 통해 Photo Diode 기반 가시광통신용 수신 모듈이 가지는 수신 범위 제한을 해결하여 사용자에게 보다 넓은 무선 송수신 커버리지를 제공하고자 한다.Through the present invention, by applying a structure such as an optical collecting plate to the receiving part for visible light communication using a photo diode, it is intended to overcome the limit of the existing photo diode's receiving part, and through this, the reception range limitation of the photo diode-based visible light communication reception module is solved. Therefore, it is intended to provide a wider wireless transmission/reception coverage to users.
상기 목적을 달성하기 위한 본 발명은, 고속 점멸을 통해 광원을 통해 전송되는 데이터를 송신하기 위한 다수의 Photo Diode가 적용된 광 수신범위가 확장된 가시광통신 수신부에 대해 제공한다.The present invention for achieving the above object provides for a visible light communication receiver with an extended light reception range to which a plurality of Photo Diodes for transmitting data transmitted through a light source through high-speed blinking is applied.
가시광통신용 수신 모듈에서 가시광 데이터의 수광을 위하여 사용되고 있는 Photo Diode의 수신 범위 확장을 위하여, 본 발명에서는 기존의 Photo Diode Array에 가시광의 수광각을 보다 넓힐 수 있는 렌즈 구조를 추가적을 접목하고자 하였다. In order to expand the reception range of the Photo Diode used for receiving visible light data in the reception module for visible light communication, the present invention was to additionally graft a lens structure that can widen the reception angle of visible light to the existing Photo Diode Array.
이는 기존의 Photo Diode의 수광 한계 범위를 확장시키며, 이를 기반으로 가시광통신 송신 모듈의 커버리지 대비 좁은 커버리지를 가지고 있는 Photo Diode 기반 가시광통신 수신 모듈의 커버리지를 확장하여 송신 모듈과 수신 모듈 커버리지 간의 균형을 맞출 수 있다.This expands the light receiving limit range of the existing Photo Diode, and based on this, it expands the coverage of the photo diode-based visible light communication receiving module, which has a narrower coverage compared to that of the visible light communication transmitting module, to balance the coverage between the transmitting module and the receiving module. can
상술한 바와 같이, 본 발명의 적용을 통하여, 가시광통신용 수신 모듈의 좁은 수신 범위를 만회하기 위하여 가시광통신용 송신 모듈을 추가적으로 설치할 필요 없이, 수신 모듈과 송신 모듈의 설치 개수를 비슷한 수준으로 설계 할 수 있으며, 이를 통해 설치 단가 및 사용자의 이동 필요성을 크게 낮춰 산업적 적용성 및 사용 편의성을 확보할 수 있다.As described above, through the application of the present invention, there is no need to additionally install a transmission module for visible light communication in order to make up for the narrow reception range of the reception module for visible light communication. , through this, it is possible to secure industrial applicability and ease of use by significantly lowering the installation cost and the need to move users.
도 1은 수신범위의 확장을 위한 가시광통신 수신부 구조 전체 사시도.1 is an overall perspective view of a structure of a visible light communication receiver for extending a reception range;
도 2는 수신범위 확장을 위한 광 집중형 수신부 렌즈 구조 예시도.2 is an exemplary view of a lens structure of a light-concentrated receiver for extending a receiving range.
도 3은 수신부에 사용되는 Photo Diode 구조 예시도.3 is an exemplary view of the structure of a Photo Diode used in a receiver;
도 4는 다수의 Photo Diode를 결합하기 위한 결합부 구조 예시도.4 is an exemplary view of the structure of a coupling part for coupling a plurality of Photo Diodes.
도 5는 수신한 데이터 수신 및 처리부 구조 예시도를 보여준다.5 shows an exemplary structure of a received data receiving and processing unit.
상술한 기술 구성을 도면과 함께 서술하면, 본 발명에서는 기존 가시광통신용 수신부의 데이터 수신 커버리지를 넓히기 위하여 다수의 Photo Diode를 결합하여 하나의 수신부로 구성하였으며, 이를 위해 Photo Diode(20)와 결합을 위한 결합부(30)로 구성된다, 또한 Photo Diode 전면에 수신범위 확장을 위한 광 집중형 수신부 렌즈(10)를 접목하여 가시광의 수광각을 넓힘으로 데이터 수신 커버리지를 더욱 넓힐 수 있으며, 최종적으로 각 Photo Diode를 통해 수신된 데이터는 데이터 수신 및 처리부(40)를 통해 최종적으로 결합되어 하나의 수신데이터로 처리된다. When describing the above-described technical configuration together with the drawings, in the present invention, a plurality of Photo Diodes are combined to form one receiver in order to expand the data reception coverage of the existing visible light communication receiver. Consists of a coupling unit 30. Also, by grafting a light-concentrated receiving unit lens 10 for extending the reception range on the front of the Photo Diode, it is possible to further expand the data reception coverage by widening the receiving angle of visible light, and finally, each Photo The data received through the diode are finally combined through the data receiving and processing unit 40 and processed into one received data.

Claims (1)

  1. 다수의 Photo Diode(20)를 중심으로 Photo Diode를 Photo Diode 결합부(30)를 통해 하나의 수신부로 사용할 수 있도록 결합하며, 수신 커버리지 확장을 위해 광 집중형 수신부(40)를 Photo Diode 앞에 설치하며, 각 Photo Diode를 통해 수신된 데이터는 데이터 수신 및 처리부(10)를 통해 하나의 수신데이터로 처리된다. A plurality of Photo Diodes (20) are combined to be used as one receiver through the Photo Diode combiner (30), and a light-concentrated receiver (40) is installed in front of the Photo Diode to extend the receiving coverage. , The data received through each Photo Diode is processed as one received data through the data receiving and processing unit 10 .
    수신범위 확장이 가능한 가시광통신용 수신부 구조를 보여준다.It shows the structure of the receiver for visible light communication that can extend the reception range.
PCT/KR2019/018600 2019-12-24 2019-12-27 Method for realizing structure of visible light communication receiving unit for expanding reception range WO2021132773A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5404006A (en) * 1993-02-22 1995-04-04 Hughes Aircraft Company High power capacity optical receiver apparatus and method employing distributed photodetectors
KR20090011431A (en) * 2007-07-26 2009-02-02 삼성전자주식회사 Method and apparatus for determining gain factor of photodetector in visible light communication
US20090269084A1 (en) * 2005-09-28 2009-10-29 Nec Corporation Light receiving circuit and digital system
KR20110053061A (en) * 2009-11-13 2011-05-19 주식회사 케이티 Singal processing method in coherent receiver
US10135528B2 (en) * 2013-12-02 2018-11-20 The University Court Of The University Of Edinburgh Receiver for communications systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5404006A (en) * 1993-02-22 1995-04-04 Hughes Aircraft Company High power capacity optical receiver apparatus and method employing distributed photodetectors
US20090269084A1 (en) * 2005-09-28 2009-10-29 Nec Corporation Light receiving circuit and digital system
KR20090011431A (en) * 2007-07-26 2009-02-02 삼성전자주식회사 Method and apparatus for determining gain factor of photodetector in visible light communication
KR20110053061A (en) * 2009-11-13 2011-05-19 주식회사 케이티 Singal processing method in coherent receiver
US10135528B2 (en) * 2013-12-02 2018-11-20 The University Court Of The University Of Edinburgh Receiver for communications systems

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