Burst Scheduling Based on Time-slotting and Fragmentation in WDM Optical Burst Switched Networks

The recent explosive growth in the Internet technology has made it imperative to have a network which supports a very high bandwidth.Wavelength division multiplexing (WDM) based on optical networks are becoming a viable solution to meet this ever-increasing bandwidth demand. Optical burst switched (OBS) networks provide a good solution for a very high traffic influx which is generally bursty in nature. In this a single control header is sent for a group of packets which constitute a burst. A good scheduling algorithm which provides efficient resource utilization and maximizes acceptance ratio for bursts is desired. At the same time it is important that the algorithm is not very computationally intensive. In this paper we develop a computationally simple algorithm which schedules bursts in a more efficient way than the existing algorithms [1], [2]. The proposed algorithm uses the concepts of time-slotting and burst fragmentation to improve performance in terms of burst dropping probability. Extensive simulation results have been used to demonstrate the performance of the algorithm.