TW200631333A - Optical communication system - Google Patents

Optical communication system

Info

Publication number
TW200631333A
TW200631333A TW095102332A TW95102332A TW200631333A TW 200631333 A TW200631333 A TW 200631333A TW 095102332 A TW095102332 A TW 095102332A TW 95102332 A TW95102332 A TW 95102332A TW 200631333 A TW200631333 A TW 200631333A
Authority
TW
Taiwan
Prior art keywords
information
transmission
transmitting end
light
random
Prior art date
Application number
TW095102332A
Other languages
Chinese (zh)
Inventor
Hidemitsu Sugiyama
Shinichiro Haruyama
Masao Nakagawa
Takehiko Yamagichi
Takemi Arita
Original Assignee
Nakagawa Lab Inc
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 Nakagawa Lab Inc filed Critical Nakagawa Lab Inc
Publication of TW200631333A publication Critical patent/TW200631333A/en

Links

Classifications

    • 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
    • H04B10/516—Details of coding or modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems

Abstract

To provide an optical communication system wherein modulated lights emitted from a plurality of light sources are received to perform a transmission of information, and a multiple access system wherein the transmission can be performed without establishing any synchronization of the light sources and wherein the arrangement is simple and can be made at a low cost. In a transmitting end apparatus 1, a transmission timing control part 14 decides, based on a random number generated by a random number generating part 13, a transmission timing and notifies it to a transmission processing part 12, which then modulates information by use of a optional modulation scheme. The modulated light is then emitted from a light source 11 at a random timing under control of the transmission timing control part 14. Similarly, information is transmitted from a plurality of other transmitting end apparatuses 1 at random timings. In a receiving end apparatus 2, a light receiving part 21 receives the modulated lights from the transmitting end apparatuses 1 and converts them to electric signals, which are then sent to a reception processing part 22 where the information is demodulated. If a collision determining part 23 detects any signal collisions, it outputs no data. Only if it detects no signal collisions, it outputs the information.
TW095102332A 2005-01-21 2006-01-20 Optical communication system TW200631333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005014381A JP2006203669A (en) 2005-01-21 2005-01-21 Optical communication system

Publications (1)

Publication Number Publication Date
TW200631333A true TW200631333A (en) 2006-09-01

Family

ID=36692348

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095102332A TW200631333A (en) 2005-01-21 2006-01-20 Optical communication system

Country Status (3)

Country Link
JP (1) JP2006203669A (en)
TW (1) TW200631333A (en)
WO (1) WO2006077968A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101529981B (en) 2006-10-27 2012-06-27 皇家飞利浦电子股份有限公司 A color controlled light source and a method for controlling color generation in a light source
WO2009010909A1 (en) 2007-07-19 2009-01-22 Koninklijke Philips Electronics N.V. Method, system and device for transmitting lighting device data
KR101503534B1 (en) * 2008-11-28 2015-03-17 삼성전자주식회사 Apparatus for transmiting and receving visible light communication data
WO2011030292A1 (en) * 2009-09-14 2011-03-17 Koninklijke Philips Electronics N.V. Coded light transmission and reception
JP5895236B2 (en) * 2011-10-12 2016-03-30 パナソニックＩｐマネジメント株式会社 Optical signal transmitter
DE112013004582T5 (en) 2012-10-09 2015-06-25 Panasonic intellectual property Management co., Ltd Luminaire and visible light communication system using them
US9407367B2 (en) 2013-04-25 2016-08-02 Beijing Guo Cheng Wan Tong Information Co. Ltd Methods and devices for transmitting/obtaining information by visible light signals
JP6480652B2 (en) * 2013-07-10 2019-03-13 パナソニック株式会社 Visible light communication device, lighting apparatus using the same, and lighting system
CN104363382B (en) * 2014-04-24 2015-10-14 北京国承万通信息科技有限公司 A kind of method and apparatus utilizing visible light signal transmission/obtaining information
JP6937479B2 (en) * 2017-06-13 2021-09-22 パナソニックＩｐマネジメント株式会社 Light source drive, lighting device, and lighting control system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07264099A (en) * 1994-03-23 1995-10-13 N T T Data Tsushin Kk Spatial transmission method
JPH07283787A (en) * 1994-04-07 1995-10-27 Matsushita Electric Ind Co Ltd Preventing method for beat disturbance
JP3354016B2 (en) * 1994-10-20 2002-12-09 株式会社リコー Wireless network communication method
JPH10224301A (en) * 1997-01-31 1998-08-21 Eruteru:Kk Method and device for auction by optical space transmission
JPH11331177A (en) * 1998-05-11 1999-11-30 Toyo Electric Corp Spatial optical transmission equipment
JP4902044B2 (en) * 1999-09-24 2012-03-21 シャープ株式会社 Semiconductor laser device, optical transmission device, optical transmission system, electronic device, control device, connection connector, communication device, optical transmission method, and data transmission / reception method

Also Published As

Publication number Publication date
WO2006077968A1 (en) 2006-07-27
JP2006203669A (en) 2006-08-03

Similar Documents

Publication Publication Date Title
TW200631333A (en) Optical communication system
US9219545B2 (en) Method, system and device for transmitting lighting device data
CA2241937C (en) Robust method and apparatus enabling multi-mode wireless optical communication
US20090208221A1 (en) Optical space transmission system using visible light and infrared light
WO2017086520A1 (en) Device for underwater communication through dimming control of visible light
AU6000898A (en) Signalling system
ES2196863T3 (en) COMMUNICATION NETWORK
CA2292627A1 (en) Wireless communications system for transmitting and receiving data with increased data rates and robustness
RU2013144720A (en) RADIO COMMUNICATION SYSTEM
CA2346618A1 (en) Method for avoiding interference in a digital communication system
EP1233549A3 (en) Communications System
KR940020196A (en) Information transmission processing device
Costanzo et al. Adaptive modulation control for visible light communication systems
EP1408620B8 (en) Transmission method and transmitter for an ultra-wide bandwidth telecommunication system
CY1126117T1 (en) DEVICE AND METHOD FOR TRANSMITTING AND RECEIVING PREPARATIONS IN A DIGITAL VIDEO TRANSMISSION SYSTEM
AU1914601A (en) Synchronized pilot reference transmission for a wireless communication system
GB2429885B (en) System for transmitting and receiving data
WO2016147474A1 (en) Optical communication system, optical signal generation device, and optical signal reception device
JP5936800B1 (en) Optical communication system and optical signal generator
ES2156614T3 (en) METHOD FOR SYNCHRONIZING DATA TRANSMISSION BETWEEN A RECEIVER AND A TRANSMITTER.
WO2003075493A3 (en) Optical free-space signalling system
Kim et al. Dimmable VLC demonstration systems based on LED
KR101933511B1 (en) Wireless optic transceiver device
CN104022826A (en) Light propagation communication system for television media
FR2819126B1 (en) DIGITAL TRANSMIT / RECEIVE CIRCUIT IN A CDMA SYSTEM