Residual Energy Scans for Monitoring Wireless Sensor Networks
Yonggang Zhao, Ramesh Govindan, Deborah L. Estrin · eScholarship (California Digital Library) · 2002
It is important to have continuously updated information about network resources and application activities after a wireless sensor network is deployed in unpredictable environment. Such information can help notify users of resource depletion or abnormal activities. However, the low user-to-node ratio and limited energy and bandwidth resources in sensor networks make extracting states from each individual node infeasible. In this paper, we propose an approach to construct abstracted scans of sensor network health by applying in-network aggregation of network states. Specifically, we design a residual energy scan that approximately depicts the remaining energy distribution within a sensor network. Simulations show that our approach has good scalability and energy-efficiency characteristics, compared to continuously extracting the residual energy individually from each node. 1