Study supports free "Super WiFi" [04.12.2014]

A large part of the wireless data transmission already takes place via WLAN networks, such as WiFi. However, these networks are currently limited to high frequency ranges at 2 GHz and above and, hence, have a limited range.

The authors of the study, Arnd Weber of the Institute for Technology Assessment and Systems Analysis (ITAS) and Jens Elsner, a former member of the staff of the KIT Communications Engineering Lab, propose to extend the frequencies for free communication to include lower ranges and even increased transmission power. These bands are being used less and less for the transmission of TV signals and are highly suited for penetrating obstacles such as walls.

Depending on the ambient conditions and by automatically adapting transmission power to prevent interference, such WLAN networks might even reach communication partners at a distance of several kilometers. Even in cities where the transmission capacity would have to be limited due to the large number of transmission stations, the range of wireless networks could be extended significantly. The networks could, for example, be made available to passersby on neighboring streets for transferring data to and from their smartphones.

Approach has to be discussed all over the world

"The implementation of our approach would have far-reaching consequences. Individuals, institutions, and companies would be far less dependent on expensive mobile communications networks in conducting their digital communication. This would also be of great economic benefit," explains Arnd Weber.

However, a worldwide and broad debate about the approach is required because governments could also use the frequencies for new TV channels or auction them to mobile telephony providers at high prices. Therefore, Arnd Weber and his co-author propose discussing their approach at the World Radiocommunication Conference (WRC). This conference, organized by the United Nations, will meet again next year and decides on the use of radio frequencies at the global level.

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