Is the Zero-Wait Policy Always Optimum for Information Freshness (Peak Age) or Throughput?
IEEE Communications Letters
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Barakat, B., Keates, S., Wassell, I., & Arshad, K. (2019). Is the Zero-Wait Policy Always Optimum for Information Freshness (Peak Age) or Throughput?. IEEE Communications Letters, 23 (6), 987-990. https://doi.org/10.1109/LCOMM.2019.2907935
© 1997-2012 IEEE. 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.
External DOI: https://doi.org/10.1109/LCOMM.2019.2907935
This record's URL: https://www.repository.cam.ac.uk/handle/1810/296502
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