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Title:Utilizing Beamforming Antennas for Wireless Multihop Networks
Author(s):Choudhury, Romit Roy
Subject(s):wireless networks
wireless multihop networks
Abstract:Wireless multihop networks are gaining popularity in applications such as mesh networks, wireless backbones, and sensor networks. Typically, communication protocols designed for such networks have explicitly or implicitly assumed an omnidirectional antenna at the radio layer. With recent progress in signal processing and antenna technologies, smart beamforming antennas have become feasible at cheaper prices, making them an attractive replacement to omnidirectional antennas. With beamforming antennas, the ability to guide RF energy in desired directions can lead to higher spatial reuse of the channel. Also, the higher communication range of beamforming antennas can be exploited to achieve stronger network connectivity, and to obtain fewer hop routes. However, existing protocols considered suitable for omnidirectional antennas are incapable of achieving these benefits. We have identified several weaknesses in these protocols, that together degrade overall network performance. We have addressed these weaknesses, and developed a better understanding of the improvements achievable with beamforming antennas. Based on the insights, we have designed medium access control (MAC) and routing protocols to suitably exploit the benefits of beamforming. We have demonstrated part of our solutions on a small prototype testbed, equipped with electronically steerable antennas.
Issue Date:2006-07
Genre:Technical Report
Other Identifier(s):UIUCDCS-R-2006-2730
Rights Information:You are granted permission for the non-commercial reproduction, distribution, display, and performance of this technical report in any format, BUT this permission is only for a period of 45 (forty-five) days from the most recent time that you verified that this technical report is still available from the University of Illinois at Urbana-Champaign Computer Science Department under terms that include this permission. All other rights are reserved by the author(s).
Date Available in IDEALS:2009-04-21

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