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Reliable hard real-time communication in industrial and embedded systems

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2 Author(s)
Jonsson, M. ; Comput. & Electr. Eng., Halmstad Univ., Halmstad ; Kunert, K.

This paper presents a framework for how to use ARQ (automatic repeat request) in combination with real-time worst-case scheduling analysis to be able to support reliable hard real-time communication. We show how to handle retransmissions of erroneous data packets, while still not jeopardizing stated delay guarantees of other packets. We demonstrate this by taking a point-to-point link as an example. Through our simulation studies we have shown that a reduction of the message error rate by several orders of magnitude is possible with a reasonable utilization penalty.

Published in:

Industrial Embedded Systems, 2008. SIES 2008. International Symposium on

Date of Conference:

11-13 June 2008