One second download a movie equipped with LED lights LiFi promising

Chinese military news network, LED lights in addition to lighting, but also to achieve communication, that is, the establishment of reverse information transmission channel to upload information. Similarly, as long as the lighting used for the LED lamp at the same time with the glazing / electric converter, receive the computer (built-in LED lamp) can send light signal. As a result, LED lights at the same time, also played a role in the wireless router, played a dual role of lighting and communication.

With LiFi Internet access, download a movie

Visible light communication was put forward by a scholar of University of Hong Kong in 1999. In recent years, there has been a breakthrough in the research of Britain, Germany, the United States and china.

2011, the United Kingdom will refresh the LiFi communication rate to 10G, with the rate of access to the Internet, download a 1G capacity of the film, just less than one second, faster than people's imagination. 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 has developed a kind of ultra fast LED lamp, luminous speed increased by 1000 times, to a greater extent to improve the communication rate of LiFi.

According to media reports, in January 7th, the Fudan University signed a settlement agreement, the 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 the forward, but just ten years. The main reason is that it has many outstanding advantages compared with the wireless communication and other optical communication.

Rich spectrum resources. Electromagnetic spectrum communication overload phenomenon is very serious, and the spectral range of the visible light and the frequency band is far more than the radio spectrum, spectrum resources are very rich. Therefore, the use of LiFi will greatly reduce the pressure of the existing radio spectrum.

Ultrafast 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 a higher transmission rate. Moreover, the laboratory products have been launched, LiFi can easily achieve more than 100M of the transmission rate, the future is likely to reach more than 1G in practical applications, so the speed of the Internet, you still worry about the card?

Communication security. Many people who have a Wi Fi installed in the home will have the habit of turning off the wireless network every night before going to bed. LiFi signal is located in the visible light frequency range, the issue of ordinary light, basically harmless to the human body, and the power consumption is small, can be said to be "green communications". 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 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

Although LiFi is still in the middle of development, has not yet formed commercial products and the realization of industrialization, but it highlights the advantages of transmission, can play a significant role in the field of military applications.

Underwater communication detection

The electromagnetic wave is very close to underwater, so it is very difficult to complete underwater communication and detection. In the early 60s of last century, it was found that the effect of sea water on the propagation of blue and green light is much smaller. It can be used as a window of communication under water. 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 the civil field, in the field hospital operation room, fighters and warships and other places, in order to prevent radio frequency interference, generally do not allow the use of radio equipment. And the arsenal of weapons and ammunition, missile silos and high security requirements of special places, the same prohibition of radio equipment. In this way, the communication of these occasions is limited, can not meet the needs of the task. With LiFi, only the special field