On the use of balking for estimation of the blocking probability for OBS routers with FDL lines

  • Authors:
  • D. Morató;J. Aracil

  • Affiliations:
  • Universidad Publica de Navarra, Spain;Universidad Autónoma de Madrid, Spain

  • Venue:
  • ICOIN'06 Proceedings of the 2006 international conference on Information Networking: advances in Data Communications and Wireless Networks
  • Year:
  • 2006

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Abstract

This paper deals with estimation of blocking probabilities for OBS switches with Fiber Delay Lines (FDLs) and full wavelength conversion An incoming burst that finds the wavelengths occupied is temporarily stored in a FDL Hence, contention will be sorted out successfully if the residual life of the system is smaller than the maximum FDL delay In order to derive the blocking probability, the most accurate methodology to date is the use of balking systems [1,2,3,4] Even though the approach is accurate for very short lengths of the FDLs we identify the cases in which inaccuracy is detected This happens precisely when the system works with low loss probabilities Mainly for large number of wavelengths on the fibers and values of the FDL length at least in the vicinity of the burst service time.