Publications:Meeting reliability and real-time demands in wireless industrial communication

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Title Meeting reliability and real-time demands in wireless industrial communication
Author Magnus Jonsson and Kristina Kunert
Year 2008
PublicationType Conference Paper
Journal
HostPublication IEEE Symposium on Emerging Technologies and Factory Automation, ETFA
DOI http://dx.doi.org/10.1109/ETFA.2008.4638500
Conference 13th IEEE International Conference on Emerging Technologies and Factory Automation, 15-18 September 2008, Hamburg, Germany
Diva url http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:239396
Abstract Employing wireless communication in industrial applications requires methods that deal with the high fraction of packet errors common to wireless transmissions. At the same time, industrial applications have real-time demands that protocols like TCP are unable to support. This paper combines ARQ (automatic repeat request) with real-time worst-case scheduling analysis to achieve both high reliability and real-time support. One or several retransmission attempts of erroneous data packets are handled, while still not jeopardizing stated delay guarantees of other packets. We present the real-time analysis for a full-duplex link using our retransmission scheme. In simulation studies, we demonstrate a possible reduction of the message error rate by several orders of magnitude for bit error rates typically experienced in wireless communication.