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Reliability-aware frame packing for the static segment of flexray

Published: 09 October 2011 Publication History

Abstract

FlexRay is gaining wide acceptance as the next generation bus protocol for automotive networks. This has led to tremendous research interest in techniques for scheduling signals, which are generated by real-time applications, on the FlexRay bus. Signals are first packed together into frames at the application-level and the frames are then transmitted over the bus. To ensure reliability of frames in the presence of faults, frames must be retransmitted over the bus but this comes at the cost of higher bandwidth utilization. To address this issue, in this paper, we propose a novel frame packing method for FlexRay bus. Our method computes the required number of retransmissions of frames that ensures the specified reliability goal. The proposed frame packing method also ensures that none of the signals violates its deadline and that the desired reliability goal for guaranteeing fault-tolerance is met at the minimum bandwidth cost. Extensive experiments on synthetic as well as a industrial case study demonstrate the benefits of our method.

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    cover image ACM Conferences
    EMSOFT '11: Proceedings of the ninth ACM international conference on Embedded software
    October 2011
    366 pages
    ISBN:9781450307147
    DOI:10.1145/2038642
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    Published: 09 October 2011

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    Author Tags

    1. flexray
    2. frame packing
    3. reliability
    4. scheduling

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    ESWeek '11
    ESWeek '11: Seventh Embedded Systems Week
    October 9 - 14, 2011
    Taipei, Taiwan

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