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Towards improved connectivity with hybrid uni/omni-directional antennas in wireless sensor networks

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2 Author(s)
Shankar, S. ; Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX ; Kundur, D.

Connectivity is a crucial requirement for wireless sensor network deployments. Without being able to guarantee a reasonable level of connectivity, many critical network operations may not be possible. Traditionally, omni-directional antennas have been used for communication in wireless sensor networks. In this paper, we analyze the effects on connectivity when a hybrid approach towards antennas is employed, by using both omni and sectorized uni-directional antennas. We present results that help understand the relationship between node density, transmission radius, uni-directional antenna beam width and network connectivity. We demonstrate that, under a broad class of conditions, a hybrid sectorized approach drastically improves connectivity and reaches higher probabilities of 100% connectivity at much smaller node densities and transmission radii. We also suggest neighborhood management procedures for a hybrid approach and comment on the costs involved in practically implementing our paradigm.

Published in:

INFOCOM Workshops 2008, IEEE

Date of Conference:

13-18 April 2008

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