Two thirds of the world’s surface is covered with water. It plays an important role in our economic presence, including in major vertical sectors such as oil, gas, shipping and tourism.

With the rapid development of the Internet of things, due to the attenuation of radio waves in the sea with the passage of distance, people begin to question the performance of the Internet of things in the water, and the underwater acoustic communication (which is effective in practice) is easy to be eavesdropped, and is not secret.

Some people say that to realize the underwater Internet of things, light is the answer. Researchers at the King Abdullah University of science and Technology (kaust) in tuwar, Saudi Arabia, are proposing solutions for underwater optical communications. They are working on a simultaneous light wave information and power transfer (SLIT) configuration to transfer energy and data to underwater electronics. Recently, researchers announced a breakthrough experiment, through which they can realize underwater two-way data and power transmission within 1.5 yards (yards) distance between sensors and receivers equipped with solar panels.

The slit system will be more useful than stranded wires. For example, in the inspection of human underwater equipment, slit is less prone to error than gesture signals, and less likely to confuse sounds than ultrasonic based communicators. It is worth noting that until now, gesture is still a common form of communication between divers.

“Split can help to charge devices in expensive or impossible places where there is no continuous power supply,” kaust doctoral student Jose Filho said in an article on the school’s website

Filho, who has been involved in the development of the laser project, envisions ships on the surface sending optical communications to underwater vehicles or IOT sensors on the seabed. The laser will communicate with and power the underwater vehicle and equipment at the same time. The returned data is relayed to the surface ship and then communicated with the land base or data center via RF (radio).

Researchers believe that surface buoys, or even UAVs flying above turbulence, can be used to inject electricity into the seabed surface and receive data at the same time.

Slipt, however, explains that it still has a lot of operational potential to invest in before it can be developed. “Underwater optical communication provides huge bandwidth and is very useful for reliable transmission of information within a few meters,” co first author abderrahmen trichili said in the article

Kaust, located along the coast of the Red Sea, has been engaged in this field for many years. It has set some records in the early development of data and underwater communication. In 2015, it ran a 4.8gb/s 16-qam-ofdm transmission using a 450 nm laser. OFDM (orthogonal frequency division multiplexing) divides a single data stream into multiple channels to reduce interference.

Interestingly, oceans are becoming more and more important to data centers. A large number of people in the world are distributed in coastal areas or coastal areas, rather than inland areas. We have seen a shift to marginal computing, which makes resources closer to data sources. In addition, seawater can provide cooling capacity. Even wave power as a way to power servers means that oceans and data are becoming intertwined.

Microsoft launched an underwater water-cooled data center 117 feet below water in 2018. In addition, cable the size of a garden hose carries almost all global public Internet traffic underwater, across oceans and continents.

So it’s not a new synergy. In addition to ecological monitoring drivers, one of the most likely and important reasons for in-depth study of ocean computing is that there is no need to pay rent or jurisdictional ownership on the high seas.

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