What is Li-Fi?

according to siginify

According to Wikipedia: Li-Fi (/ˈlaɪfaɪ/; short for light fidelity) is wireless communication technology, which utilizes light to transmit data and position between devices.

In technical terms, Li-Fi is a light communication system (hence based on photonics) that is capable of transmitting data at high speeds over the visible light, ultraviolet, and infrared spectrums. In its present state, only LED lamps can be used for the transmission of visible light.

In terms of its end use, the technology is similar to Wi-Fi – the key technical difference being that Wi-Fi uses radio frequency to transmit data.

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LuxSenz: Exploiting Sunlight for Wireless Communication

Marco Zuniga

by Marco Zuniga, TU Delft (Network and Embedded Systems Group)

In this information age, communication is central to our societies but it is taking a toll on the earth. As reported by Time Magazine, by 2013, we were already using 50% more energy moving bytes than moving airplanes around the world. Our societies face a major challenge: How can we satisfy our ever-growing demand for communication but in a sustainable manner?

Any new technology we develop must leave no ecological footprint, or as Bill Gates puts it “we need to go all the way down to zero”. We are investigating a new wireless communication system that relies on a free, abundant and natural resource: sunlight. Our concept operates in a way similar to using a mirror to send morse codes via reflections. We cover objects with smart materials to obtain similar changes in reflections, but without you noticing them.

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