Powering the next billion devices with Wi-Fi

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Abstract

We present the first power over Wi-Fi system that delivers power to low-power sensors and devices and works with existing Wi-Fi chipsets. We show that a ubiquitous part of wireless communication infrastructure, the Wi-Fi router, can provide far field wireless power without significantly compromising the network's communication performance. Building on our design, we prototype battery-free temperature and camera sensors that we power with Wi-Fi at ranges of 20 and 17 ft, respectively. We also demonstrate the ability to wirelessly trickle-charge nickel-metal hydride and lithium-ion coin-cell batteries at distances of up to 28 ft. We deploy our system in six homes in a metropolitan area and show that it can successfully deliver power via Wi-Fi under real-world network conditions without significantly degrading network performance.

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APA

Talla, V., Kellogg, B., Ransford, B., Naderiparizi, S., Smith, J. R., & Gollakota, S. (2017). Powering the next billion devices with Wi-Fi. Communications of the ACM, 60(3), 83–91. https://doi.org/10.1145/3041059

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