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Theoretical and Experimental Evaluation of Ethernet Powerlink PollResponse Chaining Mechanism

机译：以太网Powerlink轮询响应链机制的理论和实验评估

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摘要

Ethernet Powerlink (EPL) is an industrial Ethernet networking solution commonly used as a communication network in distributed control and automation systems ranging from simple I/O to highly complex motion control applications. The PollResponse Chaining (PRC) mechanism is a new EPL standard feature aimed at increasing the network performance when nodes exchange small amount of data, especially if they are connected in line topology. In this paper, we present a theoretical model suitable for assessing the real-time performance of the EPL protocol operating in both the standard and PRC mode for two basic topologies commonly found in real installations, line, and star. Moreover, we carried out a series of experiments on prototype networks in order to acquire the relevant timing parameters of the EPL network components required for the development of an OMNeT++ simulation model, which can be further exploited to evaluate the EPL protocol in the case of more complex scenarios. Finally, we propose a modification of the original PRC solution to improve its flexibility while allowing the same (or even higher) performance level. The feasibility of the proposed approach was demonstrated on a real prototype, whereas a certain performance gain over the original PRC mechanism was proved through simulations conducted on a more complex network structure.
机译：以太网Powerlink（EPL）是一种工业以太网联网解决方案，通常在分布式控制和自动化系统中用作通信网络，范围从简单的I / O到高度复杂的运动控制应用。 PollResponse Chaining（PRC）机制是一种新的EPL标准功能，旨在在节点交换少量数据时提高网络性能，尤其是当它们以线性拓扑连接时。在本文中，我们提出了一种理论模型，适用于评估在实际安装中常见的两种基本拓扑（线路和星形）中，在标准模式和PRC模式下运行的EPL协议的实时性能。此外，我们在原型网络上进行了一系列实验，以获取开发OMNeT ++仿真模型所需的EPL网络组件的相关时序参数，在更多情况下可以进一步用于评估EPL协议。复杂的场景。最后，我们建议对原始PRC解决方案进行修改，以提高其灵活性，同时允许相同（甚至更高）的性能水平。在一个真实的原型上证明了该方法的可行性，而通过在更复杂的网络结构上进行的仿真证明了相对于原始PRC机制的某些性能提升。

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