"Visible Light Communication" has attracted much attention as a new communication technology using LEDs , and is now entering a practical stage.
A venture company in Okinawa, Japan, will begin the world's first outdoor demonstration experiment in September and set about establishing high-speed communication technology. If the development is successful, it will be expected to show its talents in African and Asian emerging market countries where communication infrastructure is scarce.
Communicate with the flicker of light
Visible light communication refers to a method of using "visible light" between infrared rays and ultraviolet rays as a means of communication.
The light energy of the LED is repeatedly flashed at an ultra-high speed that is invisible to humans. By using a signal transmitting and receiving device and adjusting the blinking speed of light, it is possible to transmit and receive data as a signal as a communication means.
The reason why people rarely hear about the term visible light communication is that this communication technology has only been around for 10 years since its inception. Although it has been partially popularized in indoor facilities and in water, the ultimate goal is to be practical in the outdoors.
In the field of information communication, with the popularity of smartphones, traffic has surged. The use of channel congestion has become a problem, and telephone and e-mail contact cannot occur.
The visible light communication is just outside the scope of the Japanese "Electric Wave Method", and if the related technology can be established, it is possible to replace some of the existing communication functions by opening a wireless base station or the like. This time, LAMPSERVE, a venture company in Naha City, will begin an outdoor empirical test that is extremely rare in the world. The test site is shown below. Do you know where this is?
The answer is Estonia between Northern Europe and Russia. The reporter interviewed LAMPSERVE President Feng Gengyi Lang for the purpose of conducting the experiment.
President Feng began to pay attention to the communication technology using LEDs about five years ago. In March 2011, LAMPSERVE was established. The Great East Japan Earthquake just passed.
Taking the earthquake as an opportunity, we will strive to achieve "communication that can be connected at any time"
Regarding the reasons for starting a business independently from an information system company, President Feng said: "When an earthquake occurred in Hanshin, Awaji and the Tohoku region, communication was not possible. I witnessed the serious situation and decided to use it. Visible light communication to improve this problem."
After the company was founded, President Feng has been looking for development bases and technicians. I walked around the world and eventually came to Estonia.
Although Estonia has been independent since the former Soviet Union for only 20 years, it is now known as the "Northern Silicon Valley". President Feng pointed out: "Under the influence of the former Soviet Union, the local science and engineering university still has many excellent mathematicians and scientists. It can be said that it is the best place to promote development at low cost."
LAMPSERVE found a cooperative company in the local area, provided basic technology and hardware from Japan, and developed software for Estonia. Finally, it successfully developed a transceiver for visible light communication in Estonia.
LAMPSERVE has patented the technology for visible light communication outdoors in May this year. It is scheduled to be tested in Estonia in September, followed by an empirical test in Okinawa Prefecture.
So what is the key to conducting an empirical test in Estonia? That is the street light on the street.
LAMPSERVE envisions the use of street lights as one of the tools for visible light communication. That is, install LED on the street light to make it have communication function at the same time. It has been confirmed by the data that visible light communication can be performed in units of about 200 meters. The idea of ​​LAMPSERVE is to use street lights as an infrastructure to realize high-speed communication.
100 megabits of high-speed communication using street lights
President Feng said that at present, a street lamp can cost about 100,000 yen to lay communication transceivers. It is said that the communication speed usually ensures about 100 megabits per second.
Estonia plans to provide a new generation of high-speed Internet services to 60% of the country by 2020. If the empirical test is successful, the Estonian government will also discuss the replacement of communication methods with visible light communication.
President Feng said: "There is currently no company that can provide visible light communication at 100 megawatts outdoors. We are also receiving attention from communication companies and signal manufacturers around the world." For Japan, visible light communication is not in the "wave method". Within the scope of the restricted object. However, President Feng had a bitter experience in Japan in the past, when he was investigated as a suspicious person while conducting various investigations on street lamps and their surroundings. Japan has many other detailed regulations in addition to the "Electric Wave Act", so LAMPSERVE decided to attack the overseas market first.
After Estonia, LAMPSERVE is targeting emerging market countries in Africa and Asia. Countries such as Sudan, Myanmar and Cambodia are lagging behind in the construction of communication infrastructure. If visible light communication is used, there is no need to lay new fibers. A high-speed communication network can be constructed by using a street lamp or the like.
President Feng said seriously: "If you think about it, you can also provide visible light communication in deserts and other places in Africa. We hope to promote high-speed communication infrastructure that can be deployed at low cost globally." New technologies developed in Japan will be global. Are all emerging market countries universally available? Its success will be seen in the empirical test that began in September.
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