WiFi and LiFi Detailed Comparison with Infograph
Light Fidelity or LiFi is a revolutionary high speed, bi-directional, fully networked wireless communication technology similar to WiFi. It is touted to be the ‘next big thing’ in the field of Internet technology. Unlike WiFi, that operates on a radio frequency (RF) of upto 5 GHz, LiFi can transmit about 10,000 times the data available on RF spectrum.
It is estimated to be more than 100 times faster than existing WiFi systems and will usher in an era where machines will literally fulfill all our needs.Coined by Harold Haas, professor at the University of Edinburgh, LiFi is a form of visible light communication system that uses Light Emitting Diode (LED) bulbs for data transmission.
It is similar to optical communication technology that uses light for transmission, but this one works with a faster speed and greater bandwidth. On switching on and off LED bulbs, data is transmitted so quickly – within a few nanoseconds. It has so far reached a speed of 10 Gbps, which is about 250 times faster than ‘superfast’ broadband.
Once LiFi becomes a reality, we can use it anywhere, anytime. As LED light bulbs are available everywhere, connectivity will be possible even in airplanes, submarines, hospitals among others where WiFi fails. It does not have any electromagnetic interference like that of radio waves. Hence, it can easily pass through a more denser medium like sea water where the salt content is high. Moreover, it assures highly secure connectivity as light signals do not penetrate walls ruling out the possibility of hacking.
Wi-Fi technology has its origins in a 1985 ruling by the U.S. Federal Communications Commission that released the bands of the radio spectrum at 900 megahertz (MHz), 2.4 gigahertz (GHz), and 5.8 GHz for unlicensed use by anyone. Technology firms began building wireless networks and devices to take advantage of the newly available radio spectrum, but without a common wireless standard the movement remained fragmented, as devices from different manufacturers were rarely compatible. Eventually, a committee of industry leaders came up with a common standard, called 802.11, which was approved by the Institute of Electrical and Electronics Engineers (IEEE) in 1997. Two years later a group of major companies formed the Wireless Ethernet Compatibility Alliance (WECA, now the Wi-Fi Alliance), a global nonprofit organization created to promote the new wireless standard. WECA named the new technology Wi-Fi. Subsequent IEEE standards for Wi-Fi have been introduced to allow for greater bandwidth. The original 802.11 standard allowed a maximum data transmission rate of only 2 megabits per second (Mbps); 802.11n, introduced in 2007, has a maximum rate of 600 Mbps
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.
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.