VirCh: Virtual Mobile Charger-based Wireless Power Transfer for Large-Scale Internet-of-Things Systems

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Wireless power transfer has emerged as a promising technology to prolong the lifetime of Internet-of-Things (IoT) systems. To improve the effectiveness of this technology, mobile chargers (MCs) are particularly employed to travel inside an IoT system to wirelessly charge IoT devices. However, while extensive research is carried out, neglecting the relative locations of IoT devices dramatically degrades network performances particularly in terms of system charging efficiency, i.e., the ratio between obtained energy of IoT devices and consumed energy by MCs. Therefore, this paper presents a virtual mobile charger-based wireless power transfer strategy, VirCh, that aims at providing high charging efficiency for a large-scale IoT system composed of a base station (BS), multiple energy-constrained MCs, and massive IoT devices. The basic idea is that VirCh dispatches several virtual MCs to charge the IoT devices in the vicinity of the BS while having other MCs move along the shortest Hamiltonian cycle to charge the relatively remote ones. Simulation results validate the superiority of VirCh over state-of-the-art studies in terms of the system charging efficiency.

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  • IEICE Proceeding Series

    IEICE Proceeding Series 68 P2-12-, 2021-12-01

    The Institute of Electronics, Information and Communication Engineers

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