论文标题
无缝链接级冗余，以提高工业Wi-Fi网络的可靠性
Seamless Link-level Redundancy to Improve Reliability of Industrial Wi-Fi Networks
论文作者
论文摘要
在工厂自动化层次结构最低级别的无线通信，尤其是Wi-Fi的采用率尚未像迄今为止的速度那样快，这主要是由于确定性的严重问题。实际上，除了随机访问方案外，干扰和干扰还可以防止空气上可靠的通信，并且事实上，使无线网络无法正确支持分布式的实时控制应用程序。文献中最近出现了几篇论文，表明可以利用多样性来有效克服这一局限性。在本文中，引入了参考体系结构，其中描述了如何将无缝链接级冗余应用于Wi-Fi。该框架足够通用，可以作为未来协议增强功能的基础，还包括两个优化，旨在通过避免不必要的复制传输来提高无线通信的质量。与传统的Wi-Fi相比，通过彻底的模拟运动对一些相关的解决方案进行了分析，以强调它们的好处。结果表明，数据包丢失和网络潜伏期都明显改善。
The adoption of wireless communications and, in particular, Wi-Fi, at the lowest level of the factory automation hierarchy has not increased as fast as expected so far, mainly because of serious issues concerning determinism. Actually, besides the random access scheme, disturbance and interference prevent reliable communication over the air and, as a matter of fact, make wireless networks unable to support distributed real-time control applications properly. Several papers recently appeared in the literature suggest that diversity could be leveraged to overcome this limitation effectively. In this paper a reference architecture is introduced, which describes how seamless link-level redundancy can be applied to Wi-Fi. The framework is general enough to serve as a basis for future protocol enhancements, and also includes two optimizations aimed at improving the quality of wireless communication by avoiding unnecessary replicated transmissions. Some relevant solutions have been analyzed by means of a thorough simulation campaign, in order to highlight their benefits when compared to conventional Wi-Fi. Results show that both packet losses and network latencies improve noticeably.
