ECO: Enabling Energy-Neutral IoT Devices through Runtime Allocation of Harvested Energy

• URL: http://arxiv.org/abs/2102.13605v1
• Date: Fri, 26 Feb 2021 17:21:25 GMT
• Title: ECO: Enabling Energy-Neutral IoT Devices through Runtime Allocation of Harvested Energy
• Authors: Yigit Tuncel, Ganapati Bhat, Jaehyun Park, Umit Ogras
• Abstract summary: We present a runtime-based energy-allocation framework to optimize the utility of the target device under energy constraints. The proposed framework uses an efficient iterative algorithm to compute initial energy allocations at the beginning of a day. We evaluate this framework using solar and motion energy harvesting modalities and American Time Use Survey data from 4772 different users.
• Score: 0.8774604259603302
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Energy harvesting offers an attractive and promising mechanism to power low-energy devices. However, it alone is insufficient to enable an energy-neutral operation, which can eliminate tedious battery charging and replacement requirements. Achieving an energy-neutral operation is challenging since the uncertainties in harvested energy undermine the quality of service requirements. To address this challenge, we present a rollout-based runtime energy-allocation framework that optimizes the utility of the target device under energy constraints. The proposed framework uses an efficient iterative algorithm to compute initial energy allocations at the beginning of a day. The initial allocations are then corrected at every interval to compensate for the deviations from the expected energy harvesting pattern. We evaluate this framework using solar and motion energy harvesting modalities and American Time Use Survey data from 4772 different users. Compared to state-of-the-art techniques, the proposed framework achieves 34.6% higher utility even under energy-limited scenarios. Moreover, measurements on a wearable device prototype show that the proposed framework has less than 0.1% energy overhead compared to iterative approaches with a negligible loss in utility.

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