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Using cut-through forwarding to retain the real-time properties of Profibus over hybrid wired/wireless architectures

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3 Author(s)
Koulamas, C. ; Ind. Syst. Inst., Patras, Greece ; Koubias, S. ; Papadopoulos, G.

The benefits of wireless extensions in industrial networks are well recognized as long as the integration of the wireless and fieldbus domains will be capable of retaining the real-time and dependability quality of the current wired industrial networking solutions. In this paper, the architecture and the operation of a cut-through forwarding device are described, to be used in broadcasting, hybrid wired/wireless Profibus systems. Analytical models of the delay overhead introduced due to frame forwarding are presented. It is shown that the usage of cut-through forwarding devices relaxes the bit-rate requirements in the radio segments, while it drastically improves the inherent advantages and reduces the drawbacks of hybrid transmission media architectures, which are based on a single Medium Access Control domain.

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Industrial Electronics, IEEE Transactions on  (Volume:51 ,  Issue: 6 )