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Wired and Wireless Reliable Real-Time Communication in Industrial Systems

Magnus JonssonKristina Kunert

出版	INTECH Open Access Publisher, 2010
主題	Technology & Engineering / Automation
ISBN	95330702429789533070247
URL	http://books.google.com.hk/books?id=b1zuoAEACAAJ&hl=&source=gbs_api

註釋

Industrial communication systems would benefit immensely if both their demands on reliability, in terms of correctly transferred information, and real-time constraints could be considered, especially thinking about the emerging use of wireless communication technology. In this chapter, we have shown how this could be made possible by using a retransmission scheme where retransmissions are only allowed if they do not put at risk any delay bounds of ordinary transmissions by making sure they are not violated. Timing and scheduling analyses ensure the timely delivery of both ordinary transmissions and retransmissions. By the help of simulations, we have shown that a reduction of the message error rate with several orders of magnitude is possible, while just sacrificing a small fraction of the bandwidth. Future work includes investigating further how to enhance the framework for complex networks instead of a point-to-point link.