A Two-Phased Surveillance Aware Scheduling Mechanism for Event Detection and Packet Delivery in Wireless Sensor Networks
Date Issued
2009
Date
2009
Author(s)
Chen, Chuang-Jung
Abstract
Event detection and environment surveillance are the important issues in wireless sensor networks. However, using the non-renewable power source leads to the short lifetime of the networks, especially when the event occurred in rare frequency. For this reason to reduce the working time is using the scheduling process to determine the time sensor goes sleeping to conserve energy and wakes up. But in their sleeping time would have no ability to sense the event immediately, so the delay time and the working interval would become trade-off. In this article, we will introduce a new scheduling approach “A Two-Phased Surveillance Aware Scheduling Mechanism for Event Detection and Packet Delivery in Wireless Sensor Networks” to lower the delay time, and we use the sensed data before the event really occurred to make the scheduling policy. Consider to have lower overhead and delay of the event being sensed and the delay to transmit to the base station. We propose two surveillance models to cope with these events. Although this model is simple to create with the homogeneous GPS-free sensor nodes, it can achieve the goal of reducing the delay time of detection and delivery. Finally, we show our performance and make the mathematical analysis to compare with the simulation results then describe the improvement of our approach.
Subjects
Wireless sensor network
event detection
scheduling
surveillance
power consumption
Type
thesis
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