Conference paper
Implementing time-triggered communication over a standard ethernet switch
Cyber-physical systems in IIoT and Fog computing can use a variety of standards to guarantee real-time communication, based on enhanced switches with quality-of-service, audio-video bridging, time-triggered Ethernet and time-sensitive networking features. However, such real-time enabled network switches often come at a high design and maintenance cost.
This paper explores the feasibility of source time-triggered communication over a standard Ethernet switch without enhanced capabilities and demonstrates the minimum requirements of a system needed to enable time-triggered communication. To achieve deterministic communication and synchronous operation of the tasks, the worst-case execution time of the tasks is analyzed and a static schedule is defined.
We use the IEEE 1588 Precise Time Protocol to provide a global time reference for the network devices and time-triggered messages are scheduled at the source nodes. The communication is implemented and evaluated on a scalable synthetic cyber-physical system test-case composed of three nodes: a time server node and two application nodes that control a servo motor and exchange a time-triggered message containing the duty cycle of the pulse-width modulation signal.
Language: | English |
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Publisher: | Association for Computing Machinery |
Year: | 2019 |
Pages: | 21-25 |
Proceedings: | 2019 Workshop on Fog Computing and the Internet of Things |
ISBN: | 1450366988 and 9781450366984 |
Types: | Conference paper |
DOI: | 10.1145/3313150.3313221 |
ORCIDs: | Kyriakakis, Eleftherios , Sparsø, Jens and Schoeberl, Martin |