Algorithms for alleviating energy Hole problem in wireless sensor Networks

Abstract

newlineWireless sensor network WSN consists of a large number of small newlineBattery powered wireless sensor nodes that are scattered over an area of newlineInterest These sensor nodes collect the relevant data from the environment newlinesink In a typical WSN scenario all the data are routed back to the static sink newlineTherefore those sensor nodes near the sink have to forward all the data from newlinesensor nodes that are away from the sink and thus carry a heavier traffic load newlineConsequently the sensor nodes near the sink drain their energy quickly and newlineare more susceptible to energy exhaustion When these sensor nodes use up newlineall their energy called energy hole no more data can be transmitted back to newlinethe sink causing dysfunctional or disconnected network or premature lifetime newlineof WSN This is called energy hole problem which is a critical issue for data newlinegathering in WSN The main objective of this dissertation is to alleviate the newlineformation of energy hole near the static sink by reducing the burden on the newlinenodes near the sink Various strategies or techniques have been proposed in newlinethis thesis to reduce the energy hole problem The dissertation consists of newlinethree works and an extension of one of the works newline newline