A Preemptive Scheme with Two-Way Release Message Transmission in Optical Burst Switching: Impact of Wavelength Selection Rules on Burst Loss Probability

摘要

In this paper, we propose a new preemptive scheme with release message for optical burst switching networks. In the proposed scheme, when a low priority burst is preempted at some intermediate node, two release messages are sent immediately from the intermediate node to both source and destination nodes (two-way transmission), and the release messages release the wavelengths corresponding to the preempted burst. We consider five wavelength selection rules for the preemption and evaluate the performances of the selection rules with simulation. In numerical examples, we show that with our method, the wavelengths are utilized effectively and that our proposed method with the optimal selection rule can decrease the burst loss probability in a large-scale DWDM network.