Typical worst case response-time analysis and its use in automotive network design
Typical worst case response-time analysis and its use in automotive network design
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典型最坏情况响应时间分析及其在汽车网络设计中的应用
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
R. Ernst
中科院分区：
文献类型：
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作者：
Sophie Quinton;Torsten T. Bone;J. Hennig;M. Neukirchner;Mircea Negrean;R. Ernst
对于某些汽车应用，最坏情况下的性能保证成本太高，但必须正式保证最低水平的性能。对于此类应用，我们开发了一种称为典型最坏情况分析 (TWCA) 的方法，该方法可以正式限制给定时间窗口内计算的响应时间保证的违规次数。在本文中，我们演示了如何使用它来分析具有复杂负载模式的真实 CAN 总线。我们研究了这些负载模式的影响，并展示了如何从痕迹和规格中导出和验证必要的参数。我们将结果与常用的基本负载近似值（例如循环负载的 50% 限制）进行比较，显示出卓越的准确性和表现力。
For some automotive applications, worst case performance guarantees are too expensive, but a minimum level of performance must be formally guaranteed. For such applications, we have developed an approach called Typical Worst Case Analysis (TWCA) which can formally bound the number of violations of the computed response-time guarantee in a given time window. In this paper, we demonstrate how it can be used to analyze a real CAN bus with complex load patterns. We investigate the effects of these load patterns and show how the necessary parameters can be derived and verified from traces and specifications. We compare the results to the commonly used base load approximation - like a 50%-limit for cyclic load - showing superior accuracy and expressiveness.