Wednesday, 27 December 2017

Solar based internet by Google in Vizag(Free space optical communication)

Google is testing solar-powered drones to provide high-speed internet from the air, as part of a project called SkyBender.

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solar based internet by google

The project aims at delivering 5G internet. This internet technology has the potential of being 40 times as fast as its predecessor 4G, transferring gigabits of data every second. Another benefit of this technology is that it should dramatically reduce latency compared to 4G, supporting the development of self-driving cars by enabling them to communicate with each other almost instantly.


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The tests are run in New Mexico, where Google rents a facility from private space travel company Virgin Galactic. At this site, the tech firm has been flying with, among other planes, several solar-powered drones made by Google Titan. This division was founded after Google acquired Titan Aerospace in 2014, which worked on high-altitude, solar-powered drones with wingspans up to 50 meters.

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For delivering this next generation of internet, Google makes use of millimeter-wave radio transmissions. At a reported frequency of 28GHz, the great benefit of applying this technology is that there is little interference by other digital traffic. This is because the frequency is much less used than the overcrowded frequencies via which most cellphones currently communicate. A huge drawback on the other hand, is that the signal fades out much quicker than the 4G signal does. In order to make it work, Google experiments with focused transmission from what is called a phased array. The problem with this technique however, is that it is rather power consuming. Whether it will be possible to exploit this specific method to broadcast 5G internet on a solar-powered drone is therefore not yet clear.