Abstract
Purchase PDF (369 K)
E-mail Article
Add to my Quick Links
Cited By in Scopus (2)
Purchase PDF (342 K)
doi:10.1016/j.comnet.2004.03.030 
Copyright © 2004 Elsevier B.V. All rights reserved.
Link scheduling state information based offset management for fairness improvement in WDM optical burst switching networks
References and further reading may be available for this article. To view references and further reading you must purchase this article.
Received 7 October 2003;
Abstract
In wavelength division multiplexed (WDM)-based optical burst switching (OBS) networks, bursts that traverse longer paths are more likely to be dropped compared to bursts that traverse shorter paths resulting in a fairness problem. Fairness here refers to having, for all ingress–egress node pairs in a network, a burst to have equal likelihood to get through independent of the hop length involved. In this paper, we develop a link scheduling state based fairness improvement method which can be used in a classless as well as a multi-class environment. The basic idea is to collect link scheduling state information and use it to determine the offset times for routes with different hop lengths. By using the online link state information, this method periodically computes and adapts the offset times needed, thus inherently accounting for the traffic loading patterns and network topological connectivity. It also ensures that the delay experienced by a burst is low and shorter-hop bursts are not over-penalized while improving the performance of longer-hop bursts. The effectiveness of the proposed method is evaluated through simulation experiments.
Author Keywords: Wavelength division multiplexing; Optical burst switching; Scheduling; Burst dropping performance; Fairness
Article Outline
- 1. Introduction
- 2. Overview of LSOS
- 3. LSOS for intra-class fairness
- 4. Performance study
- 4.1. Performance of LSOS in a classless traffic environment
- 4.2. Performance of LSOS in a multi-class environment
- 4.3. Effect of the link-probing phase period on the performance of LSOS
- 5. Conclusions
- Acknowledgements
- References
- Vitae
