Modeling of Ethernet AVB Networks for Worst-Case Timing Analysis
Modeling of Ethernet AVB Networks for Worst-Case Timing Analysis
复制标题
用于最坏情况时序分析的以太网 AVB 网络建模
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
R. Ernst
中科院分区：
文献类型：
--
作者：
Jonas Diemer;J. Rox;R. Ernst
摘要 以太网目前正在被探索作为即将到来的网络标准，用于汽车、航空电子和工业自动化等许多不同行业的分布式控制应用。与 CAN 和 ProfiBus 等传统控制总线系统相比，它具有更高的性能和灵活性。对于分布式控制应用，可预测的通信时序非常重要，这在使用标准以太网时可能会出现问题。新的以太网 AVB 标准旨在通过基于流量整形的新调度算法来改进这一点。然而，当前的 AVB 标准缺乏正式的时序保证，这对于安全关键型控制应用非常重要。作为解决方案，我们提出了以太网 AVB 网络模型以及时序分析模型的转换。基于时序模型，我们应用从分布式实时系统分析中已知的组合性能分析方法来推导最坏情况下的时序属性，从而得出原始以太网 AVB 网络的时序保证。为此，我们提供了分析以太网 AVB 调度所需的形式。
Abstract Ethernet is currently explored as the upcoming network standard for distributed control applications in many different industries such as automotive, avionics and industrial automation. It offers higher performance and flexibility over traditional control bus systems such as CAN and ProfiBus. For distributed control applications, predictable communication timing is highly important which can be problematic using standard Ethernet. The new Ethernet AVB standard aims to improve this by a new scheduling algorithm based on traffic shaping. However, the current AVB standard lacks a formal timing guarantee which is important for safety-critical control applications. As a solution to this, we present a model for Ethernet AVB networks and a transformation into a timing analysis model. Based on the timing model, we apply a compositional performance analysis approach known from the analysis of distributed real-time systems to derive worst-case timing properties and hence timing guarantees of the original Ethernet AVB network. For this, we provide the required formalism for the analysis of the scheduling of Ethernet AVB.