A new real-time ethernet MAC protocol for time-critical applications

Abstract

The authors propose a new persistent transmission-based real-time Ethernet MAC protocol that provides a predictable upper bound for the delivery delay of real-time frames. Moreover, it is compatible with the protocol used by the existing Ethernet controllers for conventional datagram traffic and thus standard Ethernet stations can be used in the system without any modification. The paper describes the protocol in detail and analyses the maximum delivery delay for real-time traffic and the efficiency of the channel.

Keywords

real-time / Ethernet / multiple access protocol / industrial control networks

References

[1] BoggaD R, MogulJ C, KentC A. Measured capacity of an Ethernet: myths and reality [A]. California, 1988, 18(4): 222-234

[2] Miclot M, Roncagli B. Is there a future for Ethernet in industrial control? [J/OL]. http://www.manufacturing.net/magazine/planteng/archives/1998/ple1001.98/108520.htm.

[3] Venkatramani C, Chiueh T, 1994. Supporting real-time traffic on Ethernet [A]. In: Proceedings of the IEEE Real-Time Systems Symposium (RTSS’ 94) [C], S Juan Puerto Rico, 1988. 282–286.

[4] Pritty D W, Malone J R, Smeed D N, et al. A real-time upgrade for Ethernet based factory networking [A]. In: Proceedings of IECON [C], Orlando, Florida, 1995. 1631–1637.

[5] Lann G, Riviere N. Real-time communications over broadcast networks: the CSMA/DCR and the DOD-CSMA/CD protocols [A]. In: Proceedings of the IEEE Real-Time Systems Symposium (RTSS’94) [C], S Juan Puerto Rico, 1994. 67–84.

[6] KapsalisV D, KoubiasS A, PapadopoulosG D. Implementation of a MAC-layer protocol (GIT-CSMA/CD) for industrial LANs and its experimental performance [J]. IEEE Transactions on Industrial Electronics, 1997, 44(6): 825-839

[7] KapsalisV D, KoubiasS A, HaralabkdisH C. New hybrid MAC-protocol for real-time bus networks[A]. IEEE Proceedings of Commun [C], 1994, 141(5): 325-333

[8] RajendraY, PrashantP, RaphaelF. A reservation-based CSMA Protocol for integrated manufacturing networks [J]. IEEE Transactions on Systems, Man and Cybernetics, 1994, 24(8): 1247-1258

[9] ANSI/IEEE Std 802. 3Information technology-local and metropolitan area network [S], 1998, New York, The IEEE Standards Press

[10] Network Systems Tutorial for IEEE Std 802. 3[S]. New York: The IEEE Standards Press, 1998.