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arXiv · 1904.03470

Weighted-Sum Average Age of Information in Unilaterally Powered Two-Way Data Exchanging Systems

Cheng Hu·Yunquan Dong
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Abstract

This paper considers a two-way data exchanging system with a constant powered access point and an energy-harvesting powered smart device. The access point simultaneously transmits information and energy to the smart device with fixed powers $\bar{\rho} P_\text{t}$ and $\rho P_\text{t}$, respectively. Upon collecting enough energy, the smart device performs one block of transmission immediately. We investigate the timeless of the two-way data exchange in terms of age of information (AoI). Specifically, we investigate the trade-off between downlink timeliness and uplink timeliness by optimizing the weighted-sum average AoI. Moreover, we provide a gradient based method to compute this ratio numerically. Our numerical results show that power-splitting based systems outperform time-splitting based systems in terms of timeliness in general.

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Cheng Hu, Yunquan Dong. 2019-04-06. Weighted-Sum Average Age of Information in Unilaterally Powered Two-Way Data Exchanging Systems. https://arxiv.org/abs/1904.03470

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