Is the Zero-Wait Policy Always Optimum for Information Freshness (Peak Age) or Throughput?

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Barakat, Basel; 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, 23(6), pp. 987-990. ISSN 1089-7798 [Article]

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Official URL: https://doi.org/10.1109/LCOMM.2019.2907935

Abstract or Description

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. Afterward, 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.

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Article

Identification Number (DOI):

https://doi.org/10.1109/LCOMM.2019.2907935