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The growing attention on a new system of wireless data transmission that is spreading. There are numerous researches on new technologies of optical communication wireless on the basis of pulses of light. LI-FI ("Light"+"WI-FI") is the name of this new technology born from the need to resolve interference issues generated by the "overpopulation" of the frequencies of the electromagnetic spectrum. In fact, industry experts have by now recognized from the time the condition of finitude that characterizes the electromagnetic spectrum in terms of frequencies available for data transmission.
The research at present is producing numerous solutions that can take advantage of the spectrum of light, in place of electromagnetic.
Extremely it was interesting to see the potentiality of this system in the context of Euroluce 2017 with respect to the field study carried out by the well-known Italian company Artemide.
How does it work? The flow of data coming from the Network or a Lan is encoded and modulated by a software able to turn it into pulses of light. What acts as the issuer wireless is a LED lamp capable of emitting thousands of pulses per second and to ensure, in this way, the transmission data. To receive the pulses emitted are a receiver of light pulses, was able to detect and decode the transmitted signals and sending them to a software which takes care of processing them and converting them into electrical signals. These signals should then be read without difficulty from any computer or mobile device.
The data transmission technology LI-FI can be completely shielded, and is interrupted by any obstacle opaque to light, this aspect makes it easily sealable network as well as makes it possible to achieve LAN secure and inaccessible to anyone who is not capable of directly receiving the light pulses in question.
Other advantages are related to such a system.
Among others, a network, a LI-FI can be set on networks of LED lighting already existing in the environments in which you want to insert it without having to install new equipment or antennas, and repeaters.
In addition, the various light sources may communicate simultaneously with multiple devices, by sending different signals to each one of them and this would allow to use more efficiently the frequency spectrum and to eliminate the interference of other electromagnetic waves.
Even more interesting concerns the great utility that may arise from the use of LI-FI in the field of IoT (Internet of Things), or the use of the appliances, the smart home would be even more effective using the LI-FI that would make everything more simple, more secure, and less of a risk of saturation of the capacity of WI-FI transmission.
Anna Colarusso