Research Paper On Visible Light Communication

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The Institute of Electrical and Electronics Engineers (IEEE) Wireless Personal Area Networks working group 802.15.7 Task Group 7 is also developing a standard for VLC technologies that should be finalised by the end of 2010, whilst the EU-funded OMEGA project is investigating ways in which such technology can be incorporated into home networks.

Research in this area is being undertaken by, amongst others: Casio, Eurescom, France Telecom, NEC Corporation, Orange, Panasonic, Samsung, Sharp, Siemens AG, Telefonica, Toshiba, Universita di Roma, Universität Dortmund, Universität Ilmenau, University of Athens, University of California, and the University of Oxford.

Whilst visible light from LED systems and infrared emissions share similar frequency ranges, it is acknowledged that there are potential visual safety problems with using infrared for high rates of data transmission due to both the large energy emissions it would create and its invisibility, making suitably developed LED light data transmission a safer option for human eyes.

Radiofrequency/Microwave Communications At present the multiple use in buildings of the three independent WLAN frequency bands can often compromise information networks.

With proper development and foresight, VLC could radically reinvent the future of telecommunications industry to create a situation where everybody benefits, with technological findings also being able to be back-engineered into existing technology.

Research Paper On Visible Light Communication Essay About Using Computers Saves A Lot Of Time

The data transmission speeds of VLC systems are shown to be rapidly improving, with a frequency-modulated white LED being shown by Siemens researchers and the Heinrich Hertz Institute in Berlin to be capable of transmitting information over 5 meters at a rate of 500 Mbps, significantly faster than present Wi-Fi technologies (that can operate at rates of up to 150 Mbps).To date the Infrared Data Association (Ir DA) has standardised over 30 specifications that are widely implemented for cordless phones, printers, televisions and other devices.Its 2008 market-report indicated a prolific increase of Ir DA infrared enabled devices, of which over 1 billion units have been shipped to date, and that demand for such units was likely to increase greatly, particularly with the development of Ir Simple version 1.0 and technological advances used for Giga-IR.This is a problem that the adoption of VLC technologies could help resolve by providing alternative bandwidths.Additionally, whilst the use of radiofrequency/microwave communications devices is becoming increasingly widespread, research indicates that some emissions and intensities may also interfere with sensitive electronic equipment (), cause health problems and/or biological damage.2010: The Center for Ubiquitous Communication by Light (UC-Light) at the University of California seeks to develop VLC technology further to allow communication between a wide variety of electronic products, such as high definition televisions, information kiosks, personal computers (PCs), personal digital assistants (PDAs) and smartphones.2009: A result of the joint cooperative agreement between VLCC and the Ir DA, VLCC issue their first Specification Standard which incorporates and expands upon core Ir DA specification and defined spectrum to allow for the use of visible light wavelengths.The same researchers were also able to demonstrate that a system using up to 5 LEDs could transfer data over greater distances at 100 Mbps with direct line of sight.Reduced levels of transmission would have occurred using diffused light from walls outside of line of sight.As noted by the Visible Light Communications Consortium (VLCC) which was formed in Japan in 2003 (and includes amongst its members Casio, NEC Corporation, Panasonic, Samsung, Sharp and Toshiba), “…visible light communication has characteristics to be ubiquitous, transmitted at ultra high speed and harmless for human body and electronic devices, compared to [emissions] by radio and infrared communications.” Such factors indicate that there is a strong need to ensure that VLC are at least as biologically friendly as the units they are designed to replace or supplement, and that they may offer a more sophisticated solution to the communications technology than is presently available.


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