Theory and Experiment for Wireless-Powered Sensor Networks: How to Keep Sensors Alive

In this paper, we investigate a multi-node multi-antenna wireless-powered sensor networks (WPSN) comprised of one power beacon and multiple sensor nodes. We have implemented a real-life multi-node multi-antenna WPSN testbed that operates in real time. We propose a beam-splitting beamforming techniqu...

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Bibliographic Details
Published in:arXiv.org 2017-02
Main Authors: Choi, Kae Won, Phisca, Aditya Rosyady, Lorenz Ginting, Arif Abdul Aziz, Setiawan, Dedi, Dong In Kim
Format: Article
Language:English
Subjects:
Algorithms
Antennas
Beamforming
Beams (radiation)
Control algorithms
Control theory
Nodes
Optimization
Optimization techniques
Pareto optimum
Power consumption
Sensors
Splitting
Wireless networks
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Summary:In this paper, we investigate a multi-node multi-antenna wireless-powered sensor networks (WPSN) comprised of one power beacon and multiple sensor nodes. We have implemented a real-life multi-node multi-antenna WPSN testbed that operates in real time. We propose a beam-splitting beamforming technique that enables a power beacon to split microwave energy beams towards multiple nodes for simultaneous charging. We experimentally demonstrate that the beam-splitting beamforming technique achieves the Pareto optimality. For a perpetual operation of the sensor nodes, we adopt an energy neutral control algorithm that keeps a sensor node alive by balancing the harvested and the consumed power. The joint beam-splitting and energy neutral control algorithm is designed by means of the Lyapunov optimization technique. By experiments, we have shown that the proposed algorithm can successfully keep all sensor nodes alive by optimally splitting energy beams towards multiple sensor nodes.
ISSN:2331-8422