Scheduling Status Updates to Minimize Age of Information with an Energy Harvesting Sensor
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.
Keywords
Cite
@article{arxiv.1701.08354,
title = {Scheduling Status Updates to Minimize Age of Information with an Energy Harvesting Sensor},
author = {Baran Tan Bacinoglu and Elif Uysal-Biyikoglu},
journal= {arXiv preprint arXiv:1701.08354},
year = {2017}
}
Comments
A version of this paper has been submitted to ISIT 2017