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

Date

2017-06-30

Author

Bacınoğlu, Baran Tan
Uysal, Elif

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Age of Information is a measure of the freshness of status updates in monitoring applications and update-based systems. We study a real-time 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.

Subject Keywords

Energy harvesting, Telecommunication scheduling, Telecommunication power management, Sensors

URI

https://hdl.handle.net/11511/53982

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Department of Electrical and Electronics Engineering, Conference / Seminar