Date Added: Mar 2012
In this paper, the authors address key challenges in the deployment of Wireless Sensor Networks (WSNs) with mobile sinks for large-scale, continuous monitoring. They propose a heterogeneous and hierarchical WSN architecture for such purpose. They also introduce several novel, constrained optimization problems related to this new paradigm of data gathering, which serve as the potential research topics in this area. Driven by steady miniaturization of computer chipsets and by continuing proliferation of wireless devices and communication technology, Wireless Sensor Networks (WSNs) have emerged as a major, inter-disciplinary area of research and industrial application.