Implementing and evaluating the coordination layer andtime-synchronization of a new protocol for industrial communication networks

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2011

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Turan, Ulaş

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Currently automation components of large-scale industrial systems are realized with distributed controller devices that use local sensor/actuator events and exchange shared events with communication networks. Fast paced improvement of Ethernet provoked its usage in industrial communication networks. The incompatibility of standard Ethernet protocol with the real-time requirements encouraged industry and academic researchers to provide a resolution for this problem. However, the existing solutions in the literature suggest a static bandwidth allocation for each controller device which usually leads to an inefficient bandwidth use.Dynamic Distributed Dependable Real-time Industrial Communication Protocol (D3RIP) family dynamically updates the necessary bandwidth allocation according to the messages generated by the control application. D3RIP is composed of two protocols; interface layer that provides time-slotted access to the shared medium based on an accurate clock synchronization of the distributed controller devices and coordination layer that decides the ownership of real-time slots. In this thesis, coordination layer protocol of D3RIP family and the IEEE 1588 time synchronization protocol is implemented and tested on the real hardware system that resembles a factory plant floor. In the end, we constructed a system that runs an instance of D3RIP family with 3ms time-slots that guarantees 6.6ms latency for the real-time packets of control application. The results proved that our implementation may be used in distributed controller realizations and encouraged us to further improve the timing constraints.

Subject Keywords

Telecommunication.

URI

http://etd.lib.metu.edu.tr/upload/12613576/index.pdf
https://hdl.handle.net/11511/21064

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

U. Turan, “Implementing and evaluating the coordination layer andtime-synchronization of a new protocol for industrial communication networks,” M.S. - Master of Science, Middle East Technical University, 2011.