"Pay bursts only once" does not hold for non-FIFO guaranteed rate nodes

@article{Rizzo2005PayBO,
  title={"Pay bursts only once" does not hold for non-FIFO guaranteed rate nodes},
  author={Gianluca Rizzo and Jean-Yves Le Boudec},
  journal={Perform. Eval.},
  year={2005},
  volume={62},
  pages={366-381}
}
We consider end-to-end delay bounds in a network of Guaranteed Rate (GR) nodes. We demonstrate that, contrary to what is generally believed, the existing end-to-end delay bounds apply only to GR nodes that are FIFO per flow. We show this by exhibiting a counter-example. Then we show that the proof of the existing bounds has a subtle, but important, dependency on the FIFO assumption, which was never noticed before. Finally, we give a tight delay bound that is valid in the non-FIFO case; it is… CONTINUE READING
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