Next century challenges: scalable coordination in sensor networks
MobiCom '99 Proceedings of the 5th annual ACM/IEEE international conference on Mobile computing and networking
An architecture for building self-configurable systems
MobiHoc '00 Proceedings of the 1st ACM international symposium on Mobile ad hoc networking & computing
A distributed monitoring mechanism for wireless sensor networks
WiSE '02 Proceedings of the 1st ACM workshop on Wireless security
Energy-Efficient Communication Protocol for Wireless Microsensor Networks
HICSS '00 Proceedings of the 33rd Hawaii International Conference on System Sciences-Volume 8 - Volume 8
Lifetime Maximization in Wireless Sensor Networks
International Journal of Wireless Networks and Broadband Technologies
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A crucial issue in the management of sensor networks is the continuous monitoring of residual energy level of the sensors in the network. In this paper, we propose a hierarchical approach to construct a continuous energy map of a sensor network. Our method consists of a topology discovery and clustering phase, followed by an aggregation phase when energy information collected are abstracted and merged into energy contours in which nodes with similar energy level are grouped into the same region. The monitoring tree is restructured periodically to distribute energy cost among all nodes fairly, which increases the lifetime of the sensor network. Simulation results indicate that our method is able to generate accurate energy maps with low energy cost.