Wireless sensor networks (WSNs) require an extremely energy-efficient design. As sensor nodes have limited power\r\nsources, the problem of autonomy is crucial. Energy harvesting provides a potential solution to this problem.\r\nHowever, as current energy harvesters produce only a small amount of energy and their storage capacity is limited,\r\nefficient power management techniques must also be considered. In this article we address the problem of modeling\r\nand simulating energy harvesting WSN nodes with efficient power management policies. We propose furthermore a\r\nframework that permits to describe and simulate an energy harvesting sensor node by using a high level modeling\r\napproach based on power consumption and energy harvesting. The node architectural parameters as well as the\r\non-line power management techniques will also be specified. Two new power management architectures will be\r\nintroduced, taking into account energy-neutral and negative-energy conditions. Simulations results show that the\r\nthroughput of a sensor node can be improved up to 50% when compared to a state of the art power management\r\nalgorithm for solar harvesting WSN. The simulation framework is then used to find an efficient system sizing for a solar\r\nenergy harvesting WSN node.
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