Li-Fi (Light Fidelity) is a Wi-Fi-compliant visible light wireless communication (VLC) technology that uses light-emitting diode ( LED ) light bulbs to transmit data, providing simultaneous illumination and wireless networking without electromagnetic interference. It will help alleviate the problem of the current surge in network traffic, and the development prospects are highly promising.
Today's world is inseparable from Wi-Fi, it is ubiquitous, neighborhood neighbors, cafés are free to offer, and smart phones are indispensable. We all know Wi-Fi, but do you know Li-Fi?
As the demand for mobile wireless access continues to grow, the congestion of mobile networks and Wi-Fi will continue to increase. Even if additional radio resources (RF) are added, it may not be enough to solve the problem. This phenomenon is called "Spectrum Crunch". But a more developmental solution is quietly appearing; according to statistics, more than 70% of mobile traffic comes from indoor environments, and Li-Fi can complement each other without interference in the light-emitting diode (LED) illumination area. The bandwidth is used to solve such spectrum shortages, and its huge data density capacity can also reduce the burden on existing RF networks.
Li-Fi is the abbreviation of Light Fidelity, which is equivalent to Wi-Fi's Visible Light Communications (VLC) technology. It was invented by Harald Hass, chief scientific officer of PureLiFi and professor of the University of Edinburgh. This ground-breaking technology uses light waves from LED bulbs to transmit data, simultaneously providing illumination and wireless communication to the area of ​​use, providing an overwhelming number of wireless network links that enable network connectivity in all indoor environments or anywhere.
Visible light communication refers to any data communication transmitted through visible light, mainly relying on white light. The relative concept is infrared (Infra Red), which is the communication method currently used in remote control.
In addition to data communications, Li-Fi brings more advanced networking capabilities, including Data Roaming, Hand Over, and multiple access.
Li-Fi development background
Alexander Bell's best known identity was the inventor of the phone, but he was also the first person to show an optical communication system in 1880. In fact, just four years after inventing the phone, Bell set the world's first wireless phone. This call is made through the use of light, not radio, Photophone devices. But Bell needs to use daylight to transmit, so the range of use is quite limited.
Professor HaraldHaas and his research team at the University of Edinburgh took the lead in developing the concept of modern Li-Fi. The research and development laboratory is even located in Alexandria. Bell House (Bell was born in Edinburgh and is an alumnus of Edinburgh). The emergence of Li-Fi is expected to solve the problem of increasing spectrum congestion. Professor HaraldHaas demonstrated the Li-Fi technology for the first time at the TED Global Congress in July 2011. pureVLC was founded in 2012 and specializes in commercial Li-Fi.
Li-Fi's call for a more developmental solution
Like Wi-Fi, Li-Fi enables electronic devices such as computers, laptops, and smart phones to connect to wireless networks. Although Wi-Fi was originally developed only for the above devices, it has been widely used in connecting life with things: printers, TVs, speakers, headphones, and even sports shoes! Simply put, Li-Fi's role is the same as Wi-Fi, just using light waves as a medium, not a radio signal.
LED bulbs are rapidly replacing traditional fluorescent lamps because of their power saving and high security. Li-Fi uses light waves from LED bulbs to transmit data, so it can provide both illumination and wireless data transmission.
Imagine installing LED bulbs with Li-Fi technology in your living room, office, or even your desk and bedside lights. The place where the Li-Fi LED bulb is illuminated can also enjoy the communication convenience brought by Li-Fi.
The difference between Li-Fi and Wi-Fi
Li-Fi can turn LED desk lights into wireless access points like Wi-Fi routers. In addition to providing the advantages of lighting, what are the different functions?
Solve the blockage problem
Wi-Fi uses a relatively limited development of radio frequency (Radio Frequency) technology, such as computers, laptops, printers, smart TVs, mobile phones and tablets must compete for bandwidth. With the introduction of more Wi-Fi-enabled devices such as refrigerators, watches, and cameras, and the data offload from mobile networks, traffic congestion has become more serious, and the quality of information transmission has also been affected. Li-Fi uses the frequency of light waves, and its bandwidth is more than 10,000 times that of RF bandwidth, and does not conflict with Wi-Fi.
safety
It is well known that Wi-Fi generates Electromagnetic Interference (EMI), affects aircraft equipment and medical equipment, and is potentially dangerous for power generation, or oil and gas drilling. Li-Fi uses light instead of radio waves and is safe and immune to electromagnetic interference.
Win101 Smart Terminal,Smart Pos Payment Terminal,Android Smart Pos,Smart Mobile Payment Terminal
Guangzhou Winson Information Technology Co., Ltd. , https://www.winsonintelligent.com