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Improving data freshness in random access channels
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index.pdf
Date
2019
Author
Atabay, Doğa Can
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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The conventional network performance metrics such as throughput and delay do not accurately reflect the needs of some applications. Age of information (AoI) is a newly proposed metric that indicates the freshness of information from the receiver’s perspective. In this work, a network of multiple transmitter devices continuously updating a central station over an error-free multiaccess channel is studied. The average AoI expressions are derived for Round-Robin, Slotted ALOHA, and a proposed random access strategy called LAZY. Optimal transmission rates are found for the two source network case with different threshold parameters under LAZY. It is proven that for the two source network, LAZY performs significantly better in terms of data freshness compared to the Slotted ALOHA due to the utilization of the instantaneous AoI knowledge of the sources.
Subject Keywords
Information networks.
,
Keywords: Age of Information
,
random access
,
slotted aloha
,
age minimization.
URI
http://etd.lib.metu.edu.tr/upload/12624926/index.pdf
https://hdl.handle.net/11511/44731
Collections
Graduate School of Natural and Applied Sciences, Thesis