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arXiv · 1701.08354

Scheduling Status Updates to Minimize Age of Information with an Energy Harvesting Sensor

Baran Tan Bacinoglu·Elif Uysal-Biyikoglu
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Abstract

Age of Information is a measure of the freshness of status updates in monitoring applications and update-based systems. We study a real-time remote sensing scenario with a sensor which is restricted by time-varying energy constraints and battery limitations. The sensor sends updates over a packet erasure channel with no feedback. The problem of finding an age-optimal threshold policy, with the transmission threshold being a function of the energy state and the estimated current age, is formulated. The average age is analyzed for the unit battery scenario under a memoryless energy arrival process. Somewhat surprisingly, for any finite arrival rate of energy, there is a positive age threshold for transmission, which corresponding to transmitting at a rate lower than that dictated by the rate of energy arrivals. A lower bound on the average age is obtained for general battery size.

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Baran Tan Bacinoglu, Elif Uysal-Biyikoglu. 2017-02-05. Scheduling Status Updates to Minimize Age of Information with an Energy Harvesting Sensor. https://arxiv.org/abs/1701.08354

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