2nd International ICST Conference on Broadband Networks

Research Article

Analysis of wavelength-routed WDM networks under heterogeneous environments

  • @INPROCEEDINGS{10.1109/ICBN.2005.1589595,
        author={Han-You Jeong and Seung-Woo Seo},
        title={Analysis of wavelength-routed WDM networks under heterogeneous environments},
        proceedings={2nd International ICST Conference on Broadband Networks},
        publisher={IEEE},
        proceedings_a={BROADNETS},
        year={2006},
        month={2},
        keywords={},
        doi={10.1109/ICBN.2005.1589595}
    }
    
  • Han-You Jeong
    Seung-Woo Seo
    Year: 2006
    Analysis of wavelength-routed WDM networks under heterogeneous environments
    BROADNETS
    IEEE
    DOI: 10.1109/ICBN.2005.1589595
Han-You Jeong1,*, Seung-Woo Seo2,*
  • 1: Telecommunications R&D Center, Samsung Electronics Co. Ltd., Suwon, Korea 442–600
  • 2: School of Electrical Engineering and Computer Science, Seoul National University, Seoul, Korea 151–744
*Contact email: hyjeong@ccs.snu.ac.kr, sseo@snu.ac.kr

Abstract

Blocking probability is the most widely used performance metric for the design and the dimensioning of wavelength-routed WDM networks. In this paper, we study the blocking performance of such networks under two heterogeneities: traffic heterogeneity and configuration heterogeneity. The former means that different sessions may have different kinds of traffic, and the latter that different nodes and links may have different wavelength conversion capabilities and different number of optical fibers in use, respectively. We also investigate how these heterogeneities impact on the blocking performance of such networks. To achieve these goals, we present a dedicated analytical model for each heterogeneity. First, we present two single-link models for estimating the arrival-point wavelength occupancy distribution on a link with heterogeneous traffic: the FP model and the RP model. Both models are based on the BPP/M/C/C model in which the first two moments of an arbitrary session are matched by those of a birth-death process whose arrival rate linearly varies with the average number of busy wavelengths occupied by its own calls. Next, we derive two recurrence formulas to estimate the number of free wavelengths on a multi-fiber link and the number of free wavelengths after limited-range wavelength conversion. We also present a comprehensive analytical framework for estimating the blocking performance of WDM networks in the presence of both heterogeneities. From the numerical results, we demonstrate that our model is highly accurate in evaluating the blocking probability for a wide range of the heterogeneities discussed above.