An Exact Expression for the Average AoI in a Multi-Source M/M/1 Queueing Model

Information freshness is crucial in a wide range of wireless applications where a destination needs the most recent measurements of a remotely observed random process. In this paper, we study the information freshness of a single-server multi-source M/M/1 queueing model under a first-come first-served (FCFS) serving policy. The information freshness of the status updates of each source is evaluated by the average age of information (AoI). We derive an exact expression for the average AoI for the multi-source M/M/1 queueing model. Simulation results are provided to validate the derived exact expression for the average AoI.

Authors:
Moltafet Mohammad, Leinonen Markus, Codreanu Marian

Publication type:
A4 Article in conference proceedings

Place of publication:
2020 IEEE 31st Annual International Symposium on Personal, Indoor and Mobile Radio Communications

Keywords:
age of information (AoI), Information freshness, multi-source queueing model

Published:
8 October 2020

Full citation:
M. Moltafet, M. Leinonen and M. Codreanu, “An Exact Expression for the Average AoI in a Multi-Source M/M/1 Queueing Model,” 2020 IEEE 31st Annual International Symposium on Personal, Indoor and Mobile Radio Communications, London, United Kingdom, 2020, pp. 1-6, doi: 10.1109/PIMRC48278.2020.9217386

DOI:
https://doi.org/10.1109/PIMRC48278.2020.9217386

Read the publication here:
http://urn.fi/urn:nbn:fi-fe2020112392290