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首页> 外文期刊>IEEE transactions on industrial informatics >An active star topology for improving fault confinement in CAN networks
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An active star topology for improving fault confinement in CAN networks

机译：主动星形拓扑，用于改善CAN网络中的故障限制

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The controller area network (CAN) is a field bus that is nowadays widespread in distributed embedded systems due to its electrical robustness, low price, and deterministic access delay. However, its use in safety-critical applications has been controversial due to dependability limitations, such as those arising from its bus topology. In particular, in a CAN bus, there are multiple components such that if any of them is faulty, a general failure of the communication system may happen. In this paper, we propose a design for an active star topology called CANcentrate. Our design solves the limitations indicated above by means of an active hub, which prevents error propagation from any of its ports to the others. Due to the specific characteristics of this hub, CANcentrate is fully compatible with existing CAN controllers. This paper compares bus and star topologies, analyzes related work, describes the CANcentrate basics, paying special attention to the mechanisms used for detecting faulty ports, and finally describes the implementation and test of a CANcentrate prototype.
机译：控制器局域网（CAN）是一种现场总线，由于其强大的电气性能，低廉的价格以及确定的访问延迟，如今在分布式嵌入式系统中得到了广泛的应用。但是，由于可靠性限制（例如由其总线拓扑结构引起的限制），其在安全关键型应用中的使用一直引起争议。特别是，在CAN总线中，存在多个组件，因此，如果其中任何一个出现故障，则可能会导致通信系统的普遍故障。在本文中，我们提出了一种称为CANcentrate的有源星形拓扑设计。我们的设计通过活动集线器解决了上述限制，可防止错误从其任何端口传播到其他端口。由于该集线器的特殊特性，CANcentrate与现有的CAN控制器完全兼容。本文比较了总线和星形拓扑，分析了相关工作，描述了CANcentrate的基础知识，特别注意了用于检测故障端口的机制，最后描述了CANcentrate原型的实现和测试。

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