LiFi is a wireless optical networking technology that stands for “Light Fidelity.” It transmits data using light-emitting diodes. Professor Harald Haas demonstrated LiFi at the TED (Technology,
Entertainment, Design) Global Talk on Visible Light Communication in 2011. (VLC).
LiFi uses light for data transmission while WiFi uses electromagnetic waves at radio frequencies for data transmission. Due to less interference incurred by light compared to radio-frequency waves, it is used in more dense environments. LiFi covers a distance of about 10 meters while WiFi covers about 30 meters. Because the intensity modulation is invisible to the naked eye, communication is as smooth as it is in other radio systems, allowing users to connect wherever there is LiFi-enabled light. Data can be sent at rapid speeds from an LED light bulb to a computer using this technology.
LiFi technology provides the key to overcoming 5G’s problems. LiFi is more dependable, virtually interference-free, and uniquely secure than radio technologies like Wi-Fi or cellular, and it can broadcast at several gigabits. LiFi, the next generation of wireless that is ready for seamless integration into the 5G core, is supported by a worldwide ecosystem of companies promoting adoption.
Radio-frequency communication necessitates the use of complicated receivers, antennas, and radio circuits. LiFi, on the other hand, is more simple and uses direct modulation techniques similar to those found in low-cost infrared communication devices like remote control units. LED light bulbs have a high luminous intensity, allowing for extremely high data rates. LiFi can overcome the challenges of Radio Frequency. The benefits of LiFi are as follows:
Speed and Bandwidth: LiFi on mobile devices can give multiple Gbps speeds. This next-generation technology will push wireless technology to new heights, allowing for
Reliability: LiFi offers increased stability, allowing for interference-free connections and 1000
times the data density, resulting in a much improved user experience.
Low Latency: LiFi now has a three-fold lower latency than Wi-Fi and potentially revolutionizes innovation, automation, and applications like AR and VR.
Security: In a physical location, light can be contained and secured. Because LiFi provides
exact localization for asset monitoring and user authentication, it gives you more control.
Localization: Because LiFi is fully networked, each LiFi-enabled light has its own IP address,
complex geofencing can be easily implemented in a LiFi network.
Importance of Li-Fi:
The consumption of wireless data has increased by 60% year over year. This means that the radio-frequency spectrum is getting saturated, which might lead to a spectrum crunch—a shortage of wireless frequency to satisfy rising consumer demand—degrading internet performance..
● Where radio frequency is too harmful, Li-Fi can be used in traffic control systems employing
a car’s headlights or in chemical production plants.
● The spectrum available for Li-Fi is more than 1000 times larger than that available for radio
● In comparison to Wi-Fi, it offers more access points.
Sustainability of Li-Fi:
Li-Fi does not require additional devices such as routers, modems, signal repeaters, wave ampLiFiers, or antennas because it may work without them. Li-Fi cannot totally replace Wi-Fi as a connectivity provider at this time. However, because of the growing need for rapid internet connection, it is expected that Li-Fi will be available to the general public in early 2022, and future homes and buildings will be equipped with Li-Fi.
Writer: Taslima Ferdaus Shuva, Lecturer(Senior Scale), CSE