| Summary: | 碩士 === 淡江大學 === 資訊工程學系碩士班 === 93 === Wireless Sensor Networks (WSNs) formed by sensor nodes are operated on sensing field to detect and track events. The thesis proposes a collaborative protocol, called CoEDT, for event detection and tracking in Wireless Heterogeneous Sensor Networks (WHSNs). The main idea of CoEDT is for the same kind of sensor nodes to respectively construct the attribute region, collaborately determine whether the event occurs in the vicinity of the sensing region of different kinds of sensor nodes, and dynamically identify the event boundary via the border nodes. CoEDT comprises three major components, Vicinity Triangulation, Event Detection, and Border Node Determination. “Vicinity Triangulation” and “Event Detection” are used for the detection of events. “Border Node Determination” is exploited in tracking events. Basically, CoEDT is a fully distributed protocol for event detection and tracking. In CoEDT, event detection is achieved by means of all kinds of sensor nodes in the collaborative manner. Additionally, CoEDT is able to dynamically track the event via the suitable border nodes. The simulation results validate the performances of CoEDT in terms of the accuracy and fitness. Approximately 90% sensor nodes within the event region can be correctly identified. Besides, the border nodes identified by CoEDT can well reflect the event boundary.
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