On Renewable Sensor Networks With Wireless Energy Transfer
Traditional wireless sensor networks are constrained by limited battery energy. Thus, finite network lifetime is widely regarded as a fundamental performance bottleneck. Recent breakthrough in the area of wireless energy transfer offers the potential of removing such performance bottleneck, i.e., allowing a sensor network remain operational forever. In this paper, the authors investigate the operation of a sensor network under this new enabling energy transfer technology. The authors consider the scenario of a mobile charging vehicle periodically traveling inside the sensor network and charging each sensor node's battery wirelessly. The authors introduce the concept of renewable energy cycle and offer both necessary and sufficient conditions.