@article{Wong2008optical,
author = {E. W. M. Wong and M. Zukerman},
title = {An optical hybrid switch with circuit queueing for
burst clearing},
journal = {IEEE/OSA
Journal of Lightwave Technology},
volume = {26},
number = {21},
pages = {3509-3527},
month = {Nov.},
year = {2008},
abstract = {We consider an
optical hybrid
switch that can function as
an optical burst
switch and/or optical
circuit switch. We
propose and describe in detail a new implementation whereby
circuits have nonpreemptive priority over
bursts. To achieve nonpreemptive priority, during
circuit setup time, if there exist
bursts that use wavelength channels (also called
links) required by the circuit, the
circuit is allowed to queue
for a relatively short period of time until these
bursts are cleared. We present
an analysis based on a 3-D Markov chain that
provides exact results for the blocking
probabilities of bursts and
circuits, the proportion of circuits that
are delayed and the mean delay of the circuits that
are delayed. Because it is difficult to exactly compute the blocking probability
in realistic scenarios with a large number of
wavelengths, we derive computationally scalable and accurate approximations
based on reducing the 3-D state space into a single dimension. These scalable
approximations that can produce performance results in few seconds can readily
enable switch dimensioning. Extensive numerical
results are presented to demonstrate the accuracy and the use of the new
approximations.}
}