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Topology control is important for heterogeneous sensor networks in order to minimize the total network power consumption under the constraint that all sensor nodes’ connectivity requirements are satisfied. To address this issue, an optimization problem is first formulated, which is formally proved to be NP-hard. For practical applications, an effective solution, named topology adaptation algorithm...
We introduce a sensor network to measure the individual power consumption of a large number of network elements in near-real time. A main application of this system is to obtain profiles of the power usage of network elements, i.e., a parameterization of power consumption with respect to workload. We discuss the design and implementation of both hardware and software aspects of the system as well...
Distributed wireless sensor networks will play an important role in the future. In wireless sensor networks, observers are interested in spatio-temporal information monitored by sensors. It is crucial to design and employ energy-efficient query processing since nodes are battery-powered, and thus their lifetimes are limited. This paper proposed a query source sharing approach to optimizing query processing...
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