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Ubiquitous computing is increasingly introduced in our daily life. An emerging application is environmental monitoring in urban areas. Data gathering in such wireless sensor networks can be performed by using uncontrolled mobile sinks besides the fixed sinks in order to reduce the transmission energy. This method can be highly inefficient as the notification of presence by the mobile sink is not guaranteed...
Wireless surveillance sensor networks are often required to track multiple targets accurately, especially when the targets come close to each other at so-called mixing regions. This research presents eTrack protocol to address the following two problems for a number of targets and their mixing region: (i) which sensor nodes should be scheduled to sense a particular event such that targets are tracked...
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