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Exploiting IEEE802.11n MIMO Technology for Cost-Effective Broadband Back-Hauling

  • The lack of affordable broadband Internet connectivity in rural areas, especially in emerging regions, is seen as a major barrier for access to knowledge, education or government services. In order to reduce the costs of back-hauling in rural regions, often without access to a stable power grid, alternative solutions are required to provide high-bandwidth back-hauling at minimal power consumption to allow solar-powered operation. In this paper, we show that cost-effective low-power IEEE802.11n (MIMO) hardware together with a single cross-polarized antenna can be a viable solution to the problem. Our study shows that up to 200 Mbps of actual throughput can be achieved over distances larger than 10 km while the power consumption of a typical forwarding node is well below 10 Watts (http://wiback.org/repeater) - suitable for a cost-effective solar-powered operation. Through theoretical analysis and extensive measurements we show that such a low-cost setup can be used to establish reliable long-distance links providing high-bandwidth connectivity at low latencies and consequently providing the capacity demanded by today’s services - everywhere. Exploiting these findings we are in the process of extending existing fiber-based infrastructures in rural Africa with our Wireless Back-Haul (WiBACK) architecture.

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Document Type:Conference Object
Author:Michael Rademacher, Mathias Kretschmer, Karl Jonas
Parent Title (English):Bissyandé, van Stam (Eds.): e-Infrastructure and e-Services for Developing Countries. 5th International Conference, AFRICOMM 2013, Blantyre, Malawi, November 25-27, 2013. Revised Selected Papers
First Page:1
Last Page:11
Date of first publication:2014/08/14
Tag:IEEE 802.11n; Long-distance; MIMO; Wireless back-haul
Projects:LDWN Long-Distance WiFi Networks
Dewey Decimal Classification (DDC):0 Informatik, Informationswissenschaft, allgemeine Werke / 00 Informatik, Wissen, Systeme / 004 Datenverarbeitung; Informatik
Entry in this database:2015/05/13