Abstract
Most research works in optical burst switching (OBS) networks do not
take into account the impact of physical layer impairments (PLIs) either by
considering fully transparent (i.e., with optical 3R regeneration) or opaque
(i.e., with electrical 3R regeneration) networks. However, both solutions
are not feasible due to the technological requirements of the former and the
high cost of the latter. In this paper, we deal with a translucent OBS (TL-OBS)
network architecture that aims at bridging the gap between the transparent
and opaque solutions. In order to evaluate its performance, a formulation
of the routing and regenerator placement and dimensioning problem (RRPD) is
presented. Since such formulation results in a complex problem, we also propose
two alternative strategies. In particular, we evaluate the tradeoff between
optimality and execution times provided by these methods. Finally, we conduct
a series of simulation experiments that prove that the TL-OBS network model
proposed effectively deals with burst losses caused by the impact of PLIs
and ensures that the overall network performance remains unaffected.
© 2011 IEEE
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