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In this paper, we address the problem of node placement in a hierarchical heterogeneous wireless sensor network. We consider a two-tiered wireless sensor network where the resource constrained lite nodes (LNs) are used for sensing the environment and high-end sophisticated nodes (SNs) are added to aggregate and forward data. We intend to place minimum number of SNs to handle the traffic generated...
The current trend for monitoring different parameters in any facility is towards fully integrated surveillance systems using sensor network. For example, sensor network may be deployed over a military installation to monitor temperature, humidity, pressure and surveillance for various equipment or critical regions. Deploying individual sensors node for each parameter would be costly, especially if...
In a wireless sensor network, sensors can be randomly distributed in order to collect data from a site. In many cases the location of the wireless sensor nodes is required in order to map the collected data to a particular location. Various schemes have been proposed earlier to estimate the location of sensor nodes in a sensor network. However most of these schemes assume the absence of a malicious...
Localization in sensor networks is a prerequisite for associating the sensed phenomenon to a particular location. Various aspects of sensor network localization have recently been studied. However, amongst the vast number of localization schemes proposed, tradeoff between the energy required for localization and resulting accuracy of localization is not addressed. In a highly resource-constrained...
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