Parameter assignment for improved connectivity and security in randomly deployed wireless sensor networks via hybrid omni/uni-directional antennas

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Title: Parameter assignment for improved connectivity and security in randomly deployed wireless sensor networks via hybrid omni/uni-directional antennas
Author: Shankar, Sonu
Abstract: Conguring a network system to operate at optimal levels of performance re -quires a comprehensive understanding of the eects of a variety of system parameterson crucial metrics like connectivity and resilience to network attacks . Traditionally ,omni -directional antennas have been used for communication in wireless sensor net -works . In this thesis , a hybrid communication model is presented where -in , nodes ina network are capable of both omni -directional and uni -directional communication .The eect of such a model on performance in randomly deployed wireless sensor net -works is studied , specically looking at the eect of a variety of network parameterson network performance .The work in this thesis demonstrates that , when the hybrid communication modelis employed , the probability of 100 % connectivity improves by almost 90 % and thatof k -connectivity improves by almost 80 % even at low node densities when comparedto the traditional omni -directional model . In terms of network security , it was foundthat the hybrid approach improves network resilience to the collision attack by almost85 % and the cost of launching a successful network partition attack was increased byas high as 600 % . The gains in connectivity and resilience were found to improve withincreasing node densities and decreasing antenna beamwidths .
URI: http : / /hdl .handle .net /1969 .1 /ETD -TAMU -2892
Date: 2009-05-15

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Parameter assignment for improved connectivity and security in randomly deployed wireless sensor networks via hybrid omni/uni-directional antennas. Available electronically from http : / /hdl .handle .net /1969 .1 /ETD -TAMU -2892 .

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