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Reliability for Hard Real-time Communication in Packet-switched Networks
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Centre for Research on Embedded Systems (CERES).
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Nowadays, different companies use Ethernet for different industrial applications. Industrial Ethernet has some specific requirements due to its specific applications and environmental conditions which is the reason that makes it different than corporate LANs. Real-time guarantees, which require precise synchronization between all communication devices, as well as reliability are the keys in performance evaluation of different methods [1].  High bandwidth, high availability, reduced cost, support for open infrastructure as well as deterministic architecture make packet-switched networks suitable for a variety of different industrial distributed hard real-time applications. Although research on guaranteeing timing requirements in packet-switched networks has been done, communication reliability is still an open problem for hard real-time applications.

In this thesis report, a framework for enhancing the reliability in multihop packet-switched networks is presented. Moreover, a novel admission control mechanism using a real-time analysis is suggested to provide deadline guarantees for hard real-time traffic. A generic and flexible simulator has been implemented for the purpose of this research study to measure different defined performance metrics. This simulator can also be used for future research due to its flexibility. The performance evaluation of the proposed solution shows a possible enhancement of the message error rate by several orders of magnitude, while the decrease in network utilization stays at a reasonable level.

Place, publisher, year, edition, pages
2014. , 120 p.
Keyword [en]
Distributed real-time systems, reliability, packet-switched network, hard real-time, industrial control
National Category
Embedded Systems Communication Systems
URN: urn:nbn:se:hh:diva-27973OAI: diva2:794815
Subject / course
Computer science and engineering
2014-06-09, E3, Halmstad University, Halmstad, 16:00 (English)
Available from: 2015-03-19 Created: 2015-03-11 Last updated: 2015-03-19Bibliographically approved

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