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- W2144740142 abstract "Wireless sensor networks involve very large numbers of small, low-power, wireless devices. Given their unattended nature, and their potential applications in harsh environments, we need a monitoring infrastructure that indicates system failures and resource depletion. We describe an architecture for sensor network monitoring, then focus on one aspect of this architecture: continuously computing aggregates (sum, average, count) of network properties (loss rates, energy-levels etc., packet counts). Our contributions are two-fold. First, we propose a novel tree construction algorithm that enables energy-efficient computation of some classes of aggregates. Second, we show through actual implementation and experiments that wireless communication artifacts in even relatively benign environments can significantly impact the computation of these aggregate properties. In some cases, without careful attention to detail, the relative error in the computed aggregates can be as much as 50%. However, by carefully discarding links with heavy packet loss and asymmetry, we can improve accuracy by an order of magnitude." @default.
- W2144740142 created "2016-06-24" @default.
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- W2144740142 date "2003-10-08" @default.
- W2144740142 modified "2023-10-16" @default.
- W2144740142 title "Computing aggregates for monitoring wireless sensor networks" @default.
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- W2144740142 doi "https://doi.org/10.1109/snpa.2003.1203364" @default.
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