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Protocol for wireless real-time systems

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3 Author(s)
H. Bengtsson ; Sjoland & Thyselius, Goteborg, Sweden ; E. Uhlemann ; P. -A. Wiberg

A protocol and a communication mechanism intended for time and safety critical applications using a radio channel for information transport are considered jointly. The protocol is based on a scheme of retransmissions done on demand within a given time window. Each retransmission is coded with a varying number of redundant symbols. The set of blocks used for retransmission is controlled by two quality-of-service parameters: deadline for the transmission and the probability that the correct decoded message will reach the recipient before this deadline. Analysis of a protocol model indicates that it is possible to transmit time critical information in a mobile wireless system with very low error probabilities in an industrial environment

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Real-Time Systems, 1999. Proceedings of the 11th Euromicro Conference on

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