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Impact of AS6802 synchronization protocol on time-triggered and rate-constrained traffic

  • TTTech Computertechnik AG
  • Technical University of Denmark

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

TTEthernet is an Ethernet-based synchronized network technology compliant with the AFDX standard. It supports safety-critical applications by defining different traffic classes: Time-Triggered (TT), Rate-Constrained (RC), and Best-Effort traffic. The synchronization is managed through the AS6802 protocol, which defines so-called Protocol Control Frames (PCFs) to synchronize the local clock of each device. In this paper, we analyze the synchronization protocol to assess the impact of the PCFs on TT and RC traffic. We propose a method to decrease the impact of PCFs on TT and a new Network Calculus model to compute RC delay bounds with the influence of both PCF and TT traffic. We finish with a performance evaluation to i) assess the impact of PCFs, ii) show the benefits of our method in terms of reducing the impact of PCFs on TT traffic and iii) prove the necessity of taking the PCF traffic into account to compute correct RC worst-case delays and provide a safe system.

Original languageEnglish
Title of host publication32nd Euromicro Conference on Real-Time Systems, ECRTS 2020
EditorsMarcus Volp
PublisherSchloss Dagstuhl- Leibniz-Zentrum fur Informatik GmbH, Dagstuhl Publishing
ISBN (Electronic)9783959771528
DOIs
StatePublished - 1 Jun 2020
Externally publishedYes
Event32nd Euromicro Conference on Real-Time Systems, ECRTS 2020 - Virtual, Online
Duration: 7 Jul 202010 Jul 2020

Publication series

NameLeibniz International Proceedings in Informatics, LIPIcs
Volume165
ISSN (Print)1868-8969

Conference

Conference32nd Euromicro Conference on Real-Time Systems, ECRTS 2020
CityVirtual, Online
Period7/07/2010/07/20

Keywords

  • AS6802
  • Modeling
  • Performance analysis
  • TTE

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