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Is the Zero-Wait policy always optimum for information freshness (peak age) or throughput?

Is the Zero-Wait policy always optimum for information freshness (peak age) or throughput?

Barakat, Basel ORCID: 0000-0001-9126-7613, Keates, Simeon, Wassell, Ian and Arshad, Kamran (2019) Is the Zero-Wait policy always optimum for information freshness (peak age) or throughput? IEEE Communications Letters. ISSN 1089-7798 (Print), 1558-2558 (Online) (In Press) (doi:https://doi.org/10.1109/LCOMM.2019.2907935)

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Abstract

The Zero-Wait (ZW) policy is widely held to achieve maximum information ‘freshness’, i.e., to achieve minimum Peak Age (PA) and maximum throughput, for real-time Internet-of-Things applications. In this paper, it was shown through a series of experiments that the ZW policy is not necessarily the optimum policy for freshness nor throughput in all real-world scenarios. Firstly, the effect of delay on the ZW policy was shown on a LAN. Afterwards, the server was located on the Internet, and it was shown that the ZW policy incurred a two-fold PA and throughput performance degradation compared with continuously sending status updates.

Item Type: Article
Uncontrolled Keywords: Real-Time Systems, Status Update, Information Freshness, Peak Age of information, Zero-Wait Policy.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Department of Engineering Science
Faculty of Engineering & Science > Future Technology and the Internet of Things
Last Modified: 25 Apr 2019 15:19
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/23413

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