A Model for the Performance Analysis of SPL-OBS Core Nodes with Deflection Routing
In optical burst switching networks, techniques like wavelength conversion, optical buffer or deflection routing are often applied to resolve a contention problem that may cause data loss. Instead of the planned output port, the contended burst is sent to a new output port, on a new path to its destination by the deflection routing. In the case of wavelength conversion, the arriving burst is conveyed on a new available wavelength, but only partial wavelength conversion is available due to the technology constraint. This article considers a model for the performance evaluation of OBS core nodes with the Share-Per-Link(SPL) architecture where partial wavelength converters are distributed at each output port. A continuous-time Markov chain model is proposed to analyze the performance of OBS core nodes operated with the deflection routing rule.
KeywordsOBS node Blocking Probability Deflection Probability continuous- time Markov chain state transition rate matrix
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