Related Work
One of the first studies on WSNs for habitat monitoring was reported by Mainwaring et al. in [9], in which an instance of WSN for monitoring seabird nesting environments and behaviors was described. The authors mainly investigate hardware design of sensors, network architecture, capabilities for remote data access and management, etc. An early surveillance application using a power-constrained sensor network was proposed by Vicaire and He et al. in [10]. The authors present the design and implementation of multidimensional power management strategies in VigilNet, and further introduce a novel tripwire service with effective sentry and duty cycle scheduling so as to increase the system lifetime. There are also some other important WSN applications [11], [12] for environmental surveillance.