22/2008 : Segmentation of Standard Ethernet Messages in the Time-Triggered Ethernet

RR Number

22/2008

Conference

ETFA 2008

Author(s)

Vaclav Mikolasek, Astrit Ademaj, Stanislav Racek

Abstract

TT Ethernet is a communication architecture which allows the integration of the standard Ethernet traffic and real-time Ethernet traffic in the same network without invalidating the real-time properties of the real-time traffic. The TT Ethernet switch distinguishes between two classes of traffic. The standard Ethernet traffic is handled in conformance with the existing (standard) Ethernet, whereas the real-time traffic is transmitted with a constant transmission delay. In order to guarantee a constant message transmission delay, the TT Ethernet switch preempts the transmission of standard Ethernet messages, and retransmit the preempted Ethernet message as soon as the transmission of the real-time Ethernet message is finished. The message can be preempted several times before it is successfully transmitted, which decreases the throughput of standard Ethernet messages. In a previous work, it has been noticed that temporal phase rearrangement (the period should remain the same) of the communication scheduling for real-time messages can yield a better throughput for standard Ethernet messages. In this paper, we go a step further by proposing a segmentation mechanism for standard Ethernet messages in order to increase the throughput of standard Ethernet in a given scheduling configuration of real-time messages.

Bibtex

@article{ mikolasek:2008-22,
  author =       "Vaclav Mikolasek and Astrit Ademaj and Stanislav Racek",
  title =        "Segmentation of Standard Ethernet Messages in the Time-Triggered Ethernet",
  institution =  "Technische Universit{\"a}t Wien, Institut f{\"u}r Technische Informatik",
  address =      "Treitlstr. 1-3/182-1, 1040 Vienna, Austria",
  year =         "2008",
  number =       "22/2008"
}

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