Open AccessPerformance evaluation of an optical hybrid switch with circuit queued reservations and circuit priority preemption
Author(s) -
E.W.M. Wong,
Moshe Zukerman
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.011043
Subject(s) - blocking (statistics) , computer science , electronic circuit , scalability , preemption , optical switch , dimensioning , circuit switching , state space , markov chain , electronic engineering , dimension (graph theory) , algorithm , telecommunications , computer network , physics , mathematics , statistics , quantum mechanics , database , machine learning , pure mathematics , engineering , aerospace engineering , operating system
We provide here a new loss model for an optical hybrid switch that can function as an optical burst switch and/or optical circuit switch. Our model is general as it considers an implementation whereby some of the circuits have preemptive priority over bursts and others are allowed to queue their reservations. We first present an analysis based on a 3-dimension state-space 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 a scalable and accurate approximations based on reducing the 3-dimension state space into a single dimension. These scalable approximations that can produce performance results in a fraction of a second can readily enable switch dimensioning. Extensive numerical results are presented to demonstrate the accuracy and the use of the new approximations.