论文标题
应用于工业Wi-Fi网络的无缝冗余的实验评估
Experimental Evaluation of Seamless Redundancy Applied to Industrial Wi-Fi Networks
论文作者
论文摘要
可以利用无缝的冗余，以提高一般无线网络的可预测性，尤其是IEEE 802.11。根据这种方法，发件人同时在两个（或更多）频道上传输数据包，并且重复的副本由接收器丢弃。只要物理渠道的行为不相关，就传输潜伏期和掉落框架的百分比而言，通信质量就会显着提高。在本文中，基于对真实设备进行的测量，通过彻底的实验活动分析了冗余链接的沟通。结果证实，在典型的操作条件下，正确设计的系统中通道之间独立性的假设得到了合理的验证。实际上，在我们的实验中，测得的链路质量指数与我们对理论的预期不超过10％。这授予了与常规Wi-Fi网络相比，冗余解决方案有形优势。
Seamless redundancy can be profitably exploited to improve predictability of wireless networks in general and, in particular, IEEE 802.11. According to this approach, packets are transmitted by senders on two (or more) channels at the same time and duplicate copies are discarded by receivers. As long as the behavior of physical channels is uncorrelated, communication quality improves noticeably, in terms of both transmission latencies and percentage of dropped frames. In this paper, communication over redundant links has been analyzed by means of a thorough experimental campaign, based on measurements carried out on real devices. Results confirm that, under typical operating conditions, the assumption of independence among channels in properly designed systems is verified reasonably well. Indeed, in our experiments, measured link quality indices did not differ more than 10% from what we expected from theory. This grants for redundant solutions tangible advantages over conventional Wi-Fi networks.
