An extended comparison of slotted and unslotted deflection routing.

Abstract : In this paper, we have experimentally compared synchronized versus asynchronized all-optical deflection networks. The originality of our approach is first that we have included a model of bursty traffic : it is simulated by a bi-Poissonian emission. Second, we have compared four routing modes : synchronous mode, partially synchronous mode, and asynchronous modes with fixed and bounded size packets. All modes were considered under the same emission protocols. More precisely, we have run the several experiments with a careful attention to the several time scalings related to these different modes. Our experiments mainly show that the natural decrease of the performances of the asynchronous mode, compared to the synchronous mode, can be balanced in a significant way by the use of a sophisticated routing algorithm. Moreover, we have also shown that asynchronous routing is not very sensitive to bursty traffic. These results, and the fact that asynchronous networks are easier to design, and cheaper to build than synchronous networks, show the practical interest of asynchronous deflection routing.
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Thierry Chich, Pierre Fraigniaud. An extended comparison of slotted and unslotted deflection routing.. [Research Report] LIP RR-1997-07, Laboratoire de l'informatique du parallélisme. 1997, 2+17p. ⟨hal-02101999⟩

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