PTP accuracy measurement comparison between boundary clock and VLAN priority

Koki Horita, Shota Shiobara, Takao Okamawari, Fumio Teraoka, Kunitake Kaneko

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

IEEE1588 (PTP: Precise Time Protocol), which aims for the sub-microsecond range of clock synchronization in a minimal network, is currently focused on highly precise clock synchronization. Boundary Clock (BC) and VLAN Priority are considered to be features that improve PTP accuracy. Although some papers addressed the accuracy, these evaluations were realized using different evaluation metrics and environments. We make them comparable to analyse the contribution of BC and VLAN Priority to precise clock synchronization. Our accuracy evaluation used PTP nodes available on the market and shows the results following the test cases defined in the ITU-T G.8261 Recommendation and IEEE1588 standard. The measurement results show that the accuracy was better than 200 nanoseconds with BC enabled, while it was about one microsecond with BC disabled. We observed that the accuracy was improved to approximately 850 nanoseconds when VLAN Priority was enabled.

Original languageEnglish
Title of host publicationISPCS 2017 - International IEEE Symposium on Precision Clock Synchronization for Measurement, Control, and Communication, Proceedings
PublisherIEEE Computer Society
ISBN (Electronic)9781509057177
DOIs
Publication statusPublished - 2017 Oct 2
Event11th International IEEE Symposium on Precision Clock Synchronization for Measurement, Control, and Communication, ISPCS 2017 - Monterey, United States
Duration: 2017 Aug 272017 Sep 1

Other

Other11th International IEEE Symposium on Precision Clock Synchronization for Measurement, Control, and Communication, ISPCS 2017
CountryUnited States
CityMonterey
Period17/8/2717/9/1

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Control and Systems Engineering

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