Abstract
In order to achieve reliable event detection, wireless sensor networks (WSN) should guarantee the reliable transport of sensor data from sensor nodes to the sink. So it is very important to keep a limited deviation between sensor data (the data sensed by sensor node) and sink data (the data delivered to applications). We put forward a data reliability notion to depict this limited deviation in this paper. Noticing that sensor data vary slightly in relative short time unless certain events occur, we construct a small subset of sensor data as key data, and provide reliable transport only for these key data instead of for all sensor data. This solution decreases retransmission and energy while keeping data reliability. Based on the data reliability notion, we propose DREET, a data-reliable energy-efficient transport layer protocol. Simulation results show that DREET provides an optimal event detection rate and relative standard deviation (RSD) between sensor data and sink data, by introducing a tiny increase to energy consumption (no more than 1.97% in our simulation).
Published Version
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