Telecommunication Current Affairs
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The Union Cabinet has approved proposal for revision of policy of Ministry of Defence for providing Defence land to Communication Operators for construction of Shared Communication Towers and allied Infrastructure.
Decision in this regard was taken based on experience in implementing policy and guidelines issued by Department of Telecommunications (DoT) for issue of clearance for installation of Mobile Towers.
The revised policy will cover allotment of Defence land on lease and grant of permission in Defence areas and Cantonments to Access Service Licensees and Companies registered with DoT as IP-I (Infrastructure Providers – Category-I) for setting up shared communication towers and allied infrastructure. This move will help to improve the quality of communication services in the Cantonments and Military Stations and help address mobile call drop issues in these localities.
Scientists from Eindhoven University of Technology in Netherlands have developed a new wireless Internet network based on infrared rays that is reportedly 100 times faster than existing Wi-Fi (Wireless Fidelity) networks.
It has a huge capacity, more than 40 Gigabits per second (Gbit/s). It also does away with the need of sharing Wi-Fi, as every device gets its own ray of light.
How it works?
- The wireless data in this network comes from a few central ‘light antennas’, that are able to precisely direct the rays of light supplied by an optical fibre.
- These antennas contain a pair of gratings that radiate light rays of different wavelengths at different angles (passive diffraction gratings).
- If a user is walking and his smartphone or tablet is moving out of the light antenna’s direction, then another light antenna takes over.
- In this system, changing the light wavelengths also changes the direction of the ray of light. It uses safe infrared wavelength that does not reach the retina in the eye.
Key Features of the new system
- The network tracks the precise location of every wireless device using its radio signal transmitted in the return direction.
- Different devices are assigned different wavelengths by the same light antenna and so do not have to share capacity.
- It uses infrared light with wavelengths of 1,500 nanometres and higher. Current, Wi-Fi uses radio signals with a frequency of 2.5 or five gigahertz.
- On this network, researchers have managed to achieve a speed of 42.8 Gbit/s over a distance of 2.5 metres.
- It is hundred times fast than best Wi-Fi systems currently available that can provide users maximum 300 mbps speed.
- The new system so far has used the light rays only to download. Uploads are still done using radio signals since in most applications much less capacity is needed for uploading.