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A Reliability Scheduling Algorithm for the Static Segment of FlexRay on Vehicle Networks.

Trong-Yen Lee1, I-An Lin2, Jun-Jie Wang3

  • 1Department of Electronic Engineering, National Taipei University of Technology, Taipei 10608, Taiwan. tylee@ntut.edu.tw.

Sensors (Basel, Switzerland)
|November 8, 2018
PubMed
Summary

Transient faults in FlexRay (a real-time in-vehicle communication protocol) pose safety risks. The proposed Fast Reliability Scheduling Algorithm (FRSA) uses retransmission and lookup tables to enhance communication reliability and reduce errors.

Keywords:
FlexRaycommunication reliabilityre-transmission mechanismschedulingtime-triggeredtransient fault

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Area of Science:

  • Automotive Engineering
  • Communication Systems
  • Real-Time Systems

Background:

  • FlexRay is a key real-time communication protocol for automotive applications like X-by-wire systems.
  • Current FlexRay implementations lack mechanisms to prevent transient faults in the application layer, posing significant safety risks during operation.

Purpose of the Study:

  • To propose a novel Fast Reliability Scheduling Algorithm (FRSA) to enhance the communication reliability of the FlexRay protocol.
  • To address the dangers posed by transient faults in safety-critical automotive systems.

Main Methods:

  • Developed a Fast Reliability Scheduling Algorithm (FRSA) incorporating a retransmission mechanism to recover transient errors.
  • Utilized a lookup table method to optimize computational complexity and ensure system reliability.
  • Analyzed system reliability constraints and developed a cost function to evaluate performance with increasing message loads.

Main Results:

  • The FRSA significantly reduces the probability of transient faults within a single clock cycle.
  • Experimental results demonstrate an average reduction of 70.76% in execution time and 13.33% in cost compared to existing methods.
  • The algorithm effectively improves communication reliability and system efficiency for FlexRay.

Conclusions:

  • The proposed FRSA offers a robust solution for mitigating transient faults in FlexRay communication systems.
  • This method enhances safety and efficiency in real-time, time-triggered communication systems, particularly in automotive applications.
  • FRSA provides a valuable contribution to research on reliable periodic communication systems.