Age of Information: A Two-Sensor Status Update System Monitoring The Same Process
Abstract
This work studies the average age of information (AoI) of a monitoring system in which two sensors are sensing the same physical process and update status to a common monitor using their dedicated channels. Generally, using redundant devices to update the status of a process can improve the information timeliness at the monitor, but the disordered arrivals of updates also make the AoI analysis challenging. To that end, we model the system as two M/M/1/1 parallel status updating queues. By leveraging tools from stochastic hybrid system (SHS), we provide a general approach to analyze the average AoI, whereas a closed-form expression can be obtained when the status arrival rates and/or the service rates are the same for the two sensors. Numerical results validate the correctness of the theoretical analysis.
Keywords
Cite
@article{arxiv.2206.05710,
title = {Age of Information: A Two-Sensor Status Update System Monitoring The Same Process},
author = {Tianqing Yang and Zhengchuan Chen and Howard H. Yang and Min Wang and Yunjian Jia and Tony Q. S. Quek},
journal= {arXiv preprint arXiv:2206.05710},
year = {2022}
}