Closed-Form Expression for the Average Age of Information in a Multi-Source M/G/1 Queueing Model

In the context of the next generation wireless networks, freshness of status update packets is essential for enabling the services where a destination needs the most recent measurements of various sensors. In this paper, we study the information freshness of a multi-source M/G/1 first-come first-served (FCFS) queueing model, where each source independently generates status update packets according to a Poisson process. The information freshness of the status updates of each source is evaluated using the average age of information (AoI). To this end, we derive a closed-form expression for the average AoI of each source. As particular cases of our general expressions, we also derive closed-form expressions of the average AoI for both multi-source M/M/1 and single-source M/G/1 queueing models.

Authors:
Moltafet Mohammad, Leinonen Markus, Codreanu Marian

Publication type:
A4 Article in conference proceedings

Place of publication:
2019 IEEE Information Theory Workshop (ITW) Aug 25-28, Visby, Gotland, Sweden

Keywords:
age of information (AoI), Information freshness, multi-source M/G/1 queueing model

Published:
10 February 2020

Full citation:
M. Moltafet, M. Leinonen and M. Codreanu, “Closed-Form Expression for the Average Age of Information in a Multi-Source M/G/1 Queueing Model,” 2019 IEEE Information Theory Workshop (ITW), Visby, Sweden, 2019, pp. 1-5. doi: 10.1109/ITW44776.2019.8989346

DOI:
https://doi.org/10.1109/ITW44776.2019.8989346

Read the publication here:
http://urn.fi/urn:nbn:fi-fe202002185662