Light Fidelity, Li-Fi, is a relatively new form of wireless communication technology. It uses light signals to communicate data. The excitement surrounding Li-Fi is because it has proven to have higher speeds than Wi-Fi. In the lab, Li-Fi has reached speeds of 224 gigabits per second. The same lab field tested Li-Fi technology in a factory based in Estonia and achieved transmission rates at 1 gigabit per second.
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Li-Fi was introduced to the world by Professor Harald Hass at a 2011 TED Talk. He wanted to turn the world’s light bulbs into wireless routers. Soon after the TED Talk, in 2012, he launched Pure Li-Fi to lead the Li-Fi product development. Pure Li-Fi is a company that develops Li-Fi devices. The Li-Fi Consortium was also formed with the aim of sharing information and developing the technology. The Li-Fi Consortium is an open non-profit organization — any organization can license their technology or partner with them. There are no membership fees to join the consortium.
"All we need to do is fit a small microchip to every potential illumination device and this would then combine two basic functionalities, illumination, and wireless data transmission. In the future we will not only have 14 billion light bulbs, we may have 14 billion Li-Fis deployed worldwide for a cleaner, greener, and even brighter future." Harald Hass Ted Talk 2011.
Herald Hass has proved that data can be transmitted over the light spectrum — this makes Li-Fi a form of optical wireless communication. Li-Fi uses infra-red and ultra-violet (visible light) waves to communicate data. Infra-red and ultra-violet spectrums can carry more information than radio frequency waves. This is why Li-Fi can achieve greater speeds than Wi-Fi.
Continue reading %Li-Fi: Lighting the Future of Wireless Networks%
by Brian Sebele via SitePoint
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