Journals Proceedings

Abstract

the need for large-bandwidth networks is in continuous growth. Such demands are notivated by the continuous development of bandwidth-greedy applications (BGAs) and the desire to have everything on-line. All-optical networks are the most appropriate infrastructure to meet the requirements of bandwidth greedy applications. Three optical switching paradigms are being developed for that purpose. Among these paradigms, Optical Burst Switching (OBS) is seen as a viable solution. However, OBS is yet to be feasible due to high burst loss as a result of contention at the core node which remains the major issue in this technology and it is caused by the lack of matured and cost effective optical memory in the core routers. To address this issue, two categories of OBS have been proposed: Non-slotted OBS and Slotted OBS. In nonslotted OBS, switching is done in wavelength domain while in slotted OBS, switching is performed time domain. In this paper, we investigate the performance of the two categories. The investigation focuses on studying the impact of burst and wavelength parameters on both categories. We have used computer simulation for the study. Simulation results show that, both burst and wavelength parameters do have considerable impact on the performance of the networks and they also show that slotted outperforms non-slotted OBS.