Abstract
We propose a preemptive scheme based on the hop number of a burst for optical
burst switching (OBS) networks. In the proposed scheme, when a burst fails in reserving
a wavelength at its last hop, the burst can preempt another burst transmission. We
consider a tandem network with four OBS nodes and analyze the burst loss probability for
the proposed scheme with a continuous-time Markov chain. We also evaluate by simulation
the performance of our proposed scheme for a unidirectional ring network. Numerical
examples show that our proposed method effectively decreases the loss probability of the
burst with a large number of hops.
© 2005 Optical Society of America
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