Close menu


Sunderland Repository records the research produced by the University of Sunderland including practice-based research and theses.

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

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

Item Type: Article


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.

is-the-zero-wait-policy-always-optimum-for-information-freshness-peak-age-or.pdf - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (316kB) | Preview

More Information

Depositing User: Basel Barakat


Item ID: 14173
Identification Number:
ISSN: 1089-7798
Official URL:

Users with ORCIDS

ORCID for Basel Barakat: ORCID iD

Catalogue record

Date Deposited: 25 Nov 2021 14:39
Last Modified: 25 Jan 2022 08:49


Author: Basel Barakat ORCID iD
Author: Simeon Keates
Author: Ian Wassell
Author: Kamran Arshad

University Divisions

Faculty of Technology > School of Computer Science



Actions (login required)

View Item View Item