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

Barakat, B., Keates, S., Wassell, I. J. and Arshad, K. (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

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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 letter, it was shown through a series of experiments that the ZW policy is not necessarily the optimum policy for freshness or throughput in all real-world scenarios. First, the effect of delay on the ZW policy was shown on a local area network (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.

Publication Type: Articles
Additional Information: Department of Engineering and Design
Uncontrolled Keywords: Computer software; Systems analysis, design and performance; Real-Time Systems; Status Update; Information Freshness; Peak Age of information; Zero-Wait Policy
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
T Technology > T Technology (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Z Bibliography. Library Science. Information Resources > ZA Information resources > ZA4050 Electronic information resources
Divisions: Academic Areas > Department of Engineering, Computing and Design
Related URLs:
Depositing User: Simeon Keates
Date Deposited: 01 Dec 2020 11:23
Last Modified: 22 Feb 2022 09:04

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