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Performance analysis of multi-fiber WDM network with limited-range wavelength conversion

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Abstract

Wavelength routed optical networks have emerged as a technology that can effectively utilize the enormous bandwidth of the optical fiber. Wavelength conversion technology and wavelength converters play an important role in enhancing fiber utilization and in reducing the overall call blocking probability of the network. In this paper, we develop a new analytical model to calculate the average blocking probability in multi-fiber link networks using limited-range wavelength conversion. Based on the results obtained, we conclude that the proposed analytical model is simple and yet can effectively analyze the impact of wavelength conversion ranges and number of fibers on network performance. Also a new heuristic approach for placement of wavelength converters to reduce blocking probabilities is explored. Finally, we analyze network performance with the proposed scheme. It can be observed from numerical simulations that limited-range converters placed at a few nodes can provide almost the same blocking probability as full range wavelength converters placed at all the nodes. We also show that being equipped with a multi-fiber per-link has the same effect as being equipped with the capability of limited-range wavelength conversion. So a multi-fiber per-link network using limited-range wavelength conversion has similar blocking performance as a full wavelength convertible network. Since a multi-fiber network using limited-range wavelength conversion could use fewer converters than a single-fiber network using limited range wavelength conversion and because wavelength converters are today more expensive than fiber equipment, a multi-fiber network in condition with limited-range wavelength conversion is less costly than a single-fiber network using only limited-range wavelength conversion. Thus, multi-fiber per-link network using limited-range wavelength conversion is currently a more practical method for all optical WDM networks. Simulation studies carried out on a 14-node NSFNET, a 10-node CERNET (China Education and Research Network), and a 9-node regular mesh network validate the analysis.

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Authors and Affiliations

  1. Department of Electronics, National Laboratory on Local Optic-fiber Communication Networks and Advanced Optical Communication Systems, Peking University, Beijing, 100871, China

    Shao Ziyu, Yan Dongbin, Li Zhengbin, Wang Ziyu & Xu Anshi

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  1. Shao Ziyu
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  2. Yan Dongbin
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  3. Li Zhengbin
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  4. Wang Ziyu
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  5. Xu Anshi
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Correspondence to Shao Ziyu.

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Ziyu, S., Dongbin, Y., Zhengbin, L. et al. Performance analysis of multi-fiber WDM network with limited-range wavelength conversion. Photon Netw Commun 13, 195–205 (2007). https://doi.org/10.1007/s11107-006-0003-8

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