EDF调度算法在COTS交换式工业以太网上的实现  

EDF Scheduling Algorithm over COTS Switched Industrial Ethernet

作　　者：檀明[1] 袁暋[1] 钟伯成[1] 

机构地区：[1]合肥学院人工网络与智能信息处理重点实验室,安徽合肥230601

出　　处：《工业控制计算机》2009年第5期28-30,共3页Industrial Control Computer

摘　　要：将交换式以太网引入工业实时通信领域正受到越来越多的关注,但是,基于成熟商用组件技术(COTS)的交换式以太网在实时性方面的缺陷限制了其在工业实时通信领域中应用。基于FTT模型(FlexibleTime-Triggered communication paradigm),在无须对现有交换以太网做任何硬件改动的前提下,实现了交换式以太网上周期性实时消息与其它消息在时间上严格隔离,并针对周期性实时消息传输提出了一种基于EDF的实时性调度算法,仿真实验表明该算法具有明显的优点。Nowadays,switched Ethernet is considered as an attractive enabling technology for supporting industrial communication needs.However,COTS Ethernet switches still suffer from a few drawbacks that affect negatively their real-time communication capabilities.In this paper we propose using the Flexible Time-Triggered communication paradigm to enhance the temporal behavior of Ethernet switches with respect to periodic messages and we present an EDF-based real-time scheduling algorithm for periodic messages over switched Ethernet that operates based on master-slaves principle and the synchronized model without any modification of original switches. Simulation results show the advantages of using such scheduling algorithm.

关 键 词：EDF 周期消息 交换以太网 调度算法 FTT—Ethernet 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]