One second to download a movie, equipped with LED lights, LiFi promising

China army network news, LED lights in addition to lighting, but also to achieve communication, that is, the establishment of reverse information transmission channels to upload information. Similarly, as long as the LED lights for lighting are equipped with an optical / electric converter, the light signals sent by the computer (built in LED lights) can be received. In this way, LED lights play the role of wireless router as well as lighting and communication.

Use LiFi to surf the Internet and download a movie in one second

Visible light communication was proposed by a scholar of University of Hong Kong in China in 1999. In recent years, breakthroughs have been made in the study of Britain, Germany, the United States and china.

In 2011, the United Kingdom to LiFi communications rate refresh to 10G, with such a rate of access to the Internet, download a 1G capacity of the film, it takes less than a second time, the speed is much faster than people imagine. In September 2013, Fudan University, a LiFi prototype test, through a 1 watt LED lamp access network signal, under the light of the 4 computer can get online at the same time, the communication speed can reach 3.75G, the average net rate reached 150M, the speed has reached a new height. In January 2014, a French company demonstrates a LiFi intelligent mobile phone, it is converted to a light sensor through the front camera, with LED light receiving signal, the average internet rate is 10M, is expected to two years can achieve industrialization. In October 2014, the United States developed an ultra fast LED lamp, which improved its speed by 1000 times, and improved LiFi's communication speed to a greater extent.

According to media reports, in January 7th, Fudan University signed an enterprise settled agreement, its LiFi project will open the process of industrialization. In addition, according to foreign media reports, announced the acquisition of $15 million of new investment in the UK pure Lifi venture company before, to support the development of LiFi network Li-Flame system, it can make the LED lamp ready to LiFi access point, to complete the bidirectional data transmission function -- "with Li-Flame, LED will be able to see the light the internet".

What are the advantages of LiFi Internet access?

LiFi from the initial proposal, to the industrialization of forward, but just ten years. The main reason is that it has many outstanding advantages over radio communications and other optical communications.

Rich spectrum resources. Electromagnetic spectrum communication overload is very serious, but the spectrum range and bandwidth of visible light are far more than the radio spectrum, and the spectrum resources are very rich. Therefore, the use of LiFi will substantially reduce the pressure on existing radio spectrum usage.

Ultra fast transmission rate. Many people have such experience: sure Home Internet broadband access up to 8~12M, but the Internet speed is not fast, watch the video or download large files often card, if using a wireless router forwarding time, Internet Wi Fi signal, the card will be more. The bandwidth of the visible light itself is very wide, which means higher transmission rates. Moreover, the laboratory products have been introduced, indicating that LiFi can easily achieve more than 100M transmission rate, the future is likely to reach more than 1G in practical applications, so the Internet speed, you are also worried about the card?

Communication harmless security. Many people with Wi Fi must have the habit of switching off the wireless network every night before they go to bed and worrying about the harmful effects of wireless signals. The LiFi signal is in the visible light frequency range, sends out is the ordinary light, to the human body basically harmless, moreover the power consumption is not big, may say is "the green correspondence"". In addition, the visible light can not penetrate the objects in the laboratory using LiFi, after drawing the curtains, the LiFi signal can not give out the window, nor "through", don't have to worry about someone break your Wi Fi password, sharing your home wireless network.

Convenient, energy-saving and high efficiency. LiFi mainly through the implementation of LED lights, using power line ready, do not need to lay special signal lines, and quick installation, can be placed in any indoor place, lights lighting at the same time can transmit signals, power consumption is less than the luminous power of 5%, less than half the estimated cost of fiber broadband, but also in the scope of human adaptation the adjustment of lighting power can be said that best meet the communication needs, convenient and efficient.

LiFi military capabilities

Although LiFi is still in development, it has not yet formed commercial products and industrialization, but its outstanding advantages can play a great role in the field of military applications.

Underwater communication detection

Underwater propagation of electromagnetic waves is very close, so it is very difficult to perform underwater communication and detection. In the early 60s of the last century, it was found that the influence of seawater on blue-green light propagation was much smaller, and it could be used as a window for underwater propagation, and solved the problems of electromagnetic wave, underwater communication and detection. The emergence of LiFi electromagnetic wave underwater transmission is a new choice, the use of blue and green LED lamp. The underwater communication or detection system, may accelerate the realization of people for a long time for electromagnetic wave underwater communication and detection of the dream, and to a fast communication, submarine communication and water underwater target detection provides efficient means of communication.

Special place communication

Similar to civilian areas, radio equipment is not permitted to prevent radio frequency signal interference in fields such as field hospitals, operation room, fighter planes and naval vessels. Weapons, ammunition depots, missile silos, and special places requiring high security are also prohibited from carrying radio equipment. As a result, communication on these occasions is limited and does not meet mission requirements. With LiFi, you only need to connect LED lights in special places to satellites or other communication networks,