Abstract
The recent advances in wireless energy transfer technology provide a promising way to solve the problem of limited battery capacity of sensor nodes in wireless sensor networks. Adoption of mobile charger in the wireless rechargeable sensor networks (WRSNs) makes it easier to charge sensor nodes rather than charging with energy harvesting schemes. However, many existing energy replenishment schemes do not adapt to the scenarios in which there are uneven distribution of charging requests with temporal and spatial constraints. As a result, sensor nodes get starved due to ill-timed response of mobile charger and thus network performance is degraded. In this paper, we aim to overcome this problem and propose a heap based energy replenishment scheme in on-demand scenario of WRSNs. The simulation results show that proposed scheme outperforms the popular existing scheme Nearest-Job-Next with Preemption (NJNP).
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