Support Industrial Hard Real-Time Traffic with Switched Ethernet

: This paper presents a simple and efficient switched Ethernet communication protocol for industrial hard real-time LAN applications. The network is founded with end nodes and a switch, and hard real-time communication is handled by software added between the Ethernet protocols and the TCP/IP suites. We established a virtual link of the source and destination node by applying admission control based upon the requested QoS, and manages hard real-time traffic to bypass the TCP/IP stacks. This bypassing considerably reduces the dwell time in the nodes, and increases the achievable data frame rate. After the bypassing, hard real-time traffic schedule is executed according to dynamic-priority EDF algorithm. The protocol does not need any modifications in the Ethernet hardware and coexists with TCP/IP suites, therefore, the LAN with the protocol can be connected to any existing Ethernet networks and support both real-time traffic and best-effort traffic. Compared to some conventional hard re...

• Type: Conference
• Year: 2005
• Where: ICESS
• Authors: Alimujiang Yiming, Toshio Eisaka
• Keywords: Hard Real-time, Hard Real-time Lan, Hard Real-time Traffic, ICESS 2005