Industry Network QoS Approach Based on New Ethernet Standards

摘要

Quality of Service (QoS) mechanisms has long been designed as network layer protocols and implemented in routers, whereas many industry control networks are based on switches; there has basically no QoS mechanism implemented in switches. This article surveys the development trends of Ethernet standards and creates specific QoS policies on data link layer for industry applications. Two scenarios are discussed, one is power substation control LAN and the other is power industry enterprise backbone. Based on the analysis of data traffics in power industry both locally and remotely, Ethernet-based QoS approaches are proposed. The solutions for power industry also represent typical process control network and infrastructure network applications.