Using Switched Ethernet for Hard Real-Time Communication
نویسندگان
چکیده
Previous results on traf£c shaping on Switched Ethernet technology demonstrate its practicability and effectiveness for hard real-time communication [8]. The application-toapplication delays on a 5-node network were reported to be less than a millisecond with both Fast Ethernet and Gigabit Ethernet technology with a link utilization of 93% and 49%. In this paper we describe directions of research to extend this work, targeting performance bottlenecks we identi£ed in the current design. We present ideas on of¤oading the traf£c shaping process and the receive process into the £rmware of a network interface card (NIC) and we re£ne the one-shot reservation protocol for best-effort traf£c.
منابع مشابه
Low-latency Hard Real-Time Communication over Switched Ethernet
Ethernet, the most widely used commodity network, increasingly moves toward switches as implementation technology thus replacing busses. This allows to use traf£c shaping techniques to implement hard real-time distributed systems on commodity networks. However, because Ethernet switches lack build-in policing features, nodes connected by Switched Ethernet need to be cooperative. Although the th...
متن کاملSupport 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 ba...
متن کاملReal Time Characteristics of Ethernet and Its Improvement
There is a growing interest of using Ethernet to support time constrained communication raised from process control, factory automation and other real-time applications. This paper first presents a comprehensive analysis of the temporal characteristics of traditional Ethernet and the improvements for them, then summarizes the interesting features offered by a switched Ethernet for supporting ti...
متن کاملA Scheduling Algorithm of Periodic Messages for Hard Real-time Communications on a Switched Ethernet
Switched Ethernet has been considered as a promising network technology for real-time communications required by process control, factory automation and other real-time applications. The switched Ethernet has many features for real-time communications such as providing a large amount of bandwidth, micro-segmentation of traffic, and full-duplex links, but to provide the hard real-time communicat...
متن کاملEnhanced Ethernet Switching for Flexible Hard Real-Time Communication
Switched Ethernet arose in the last decade as a means to increase global throughput with parallel switching paths, segment the network and create isolated collision domains, thus reducing the non-determinism of the original shared Ethernet. However the services provided by COTS Ethernet switches are not enough to guarantee real-time communication, which lead to the development of several switch...
متن کامل