Publication Abstracts

Benefits of advertising wavelength availability in distributed lightpath establishment
S. Shen, G. Xiao, and T. H. Cheng, in Proc. IEEE Internationl Conference on Communications (ICC) 2005, 16–20 May 2005, Seoul, Korea.

Abstract: In this paper, we study the benefits of advertising wavelength availability in a distributed lightpath establishment environment by extensive simulations. Various cases with different routing methods, densities of wavelength conversions, and degrees of network connectivity are evaluated. In all these cases, we show that advertising wavelength availability can only improve network blocking performance under light traffic load. In addition, we demonstrate how the performance gain is affected by routing, wavelength conversion, and network connectivity.

Full Text (PDF 279K) | Presentation Slides (PDF)

Presentation slides to be available soon.

Evaluating link-state update triggers in wavelength-routed networks
S. Shen, G. Xiao, and T. H. Cheng, in Proc. Asia-Pacific Optical Communications Conference and Exhibition (APOC) 2004, 7–11 November 2004, Beijing, China.

Abstract: In this paper, we evaluate link-state update triggers in wavelength-routed networks. We consider two popular triggers, namely the Absolute Threshold Trigger and the Relative Threshold Trigger. The blocking performance of the two triggers is confirmed to be highly dependent on traffic load. Moreover, it is observed that under light traffic load, blocking performance degrades significantly once the threshold is shifted away from advertising every single link state change immediately. We expect that the above observation would be of significant importance and would impose a critical challenge to the future development of link-state update methods.

Full Text (PDF 283K) | Presentation Slides (PDF)

Presentation slides to be available soon.

Evaluating the impact of the link-state update period on the blocking performance of wavelength-routed networks
S. Shen, G. Xiao, and T. H. Cheng, in Proc. Optical Fiber Communication Conference (OFC) 2004, Feb. 22–27, 2004, Los Angeles, CA USA, paper ThG6.

Abstract: The impact of the link-state update period on the blocking performance of wavelengthrouted networks is evaluated. We show that exclusive use of wavelengths and wavelength continuity constraint cause the impact to be highly load-sensitive.

Full Text (PDF 200K) | Presentation Slides (PDF 183K)