Sensor networks consist of very large number of resource constrained nodes, and to properly evaluate the performance of these networks a scalable ad-hoc wireless network simulator is needed. The JIST/SWANS is a highly scalable wireless network simulator with reported results for a million node network. However, it lacks an energy model. This work presents the design and implementation of an energy model for the JiST/SWANS simulator, which enables it to account for the energy consumed by wireless ad hoc and sensor networks驴 protocols. The instrumented energy model is validated through simulation. Results using JiST/SWANS and ns-2 are obtained and compared for similar network scenarios.
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