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Is the Zero-Wait Policy Always Optimum for Information Freshness (Peak Age) or Throughput?
B. Barakat, S. Keates, I. Wassell,
Published in IEEE
2019
Volume: 23
   
Issue: 6
Pages: 987 - 990
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 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. © 1997-2012 IEEE.
About the journal
JournalData powered by TypesetIEEE Communications Letters
PublisherData powered by TypesetIEEE
ISSN10897798
Open AccessNo
Concepts (5)
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    Real-time systems
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    Status update
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    Information freshness
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    Peak age of information
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    Zero-wait policy