Lasers, Fiber Optics, and Communications

Theoretical analysis of preconfigured k-edge-connected structures in flexible bandwidth optical networks

[+] Author Affiliations
Wei Zhang, Jie Zhang, Xin Li

Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, No. 10 Xitucheng Road, Beijing 100876, China

Opt. Eng. 55(6), 066105 (Jun 07, 2016). doi:10.1117/1.OE.55.6.066105
History: Received February 11, 2016; Accepted May 6, 2016
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Abstract.  We propose a protection scheme based on preconfigured k-edge-connected structures (p-kecs) and study the spectrum resource redundancy of flexible bandwidth optical networks under single-link-failure and multiple-link-failure environments. The lower bound of redundancy and the upper bound on efficiency of preconfigured protection structures in flexible bandwidth optical networks are provided. With sufficient capacity, the analysis shows that p-cycle is the optimal structure against single-link failure and p-kecs are the optimal structures to address multiple-link failures. Straddling links reduce the network redundancy while requiring little or no increase in spare spectrum capacity relative to the total spectrum capacity consumed in the protection process. We theoretically prove that the spectrum resource redundancy of the p-kecs has the same lower bound as that of flexible bandwidth optical networks under multiple-link failures. Numerical results show that p-kecs can achieve or approximate the lower bound on redundancy and support protection against multiple-link failures in static and dynamic networks. These results support the theoretical underpinning for the efficiency of p-kecs in providing protection against multiple-link failures in flexible bandwidth optical networks.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Wei Zhang ; Jie Zhang and Xin Li
"Theoretical analysis of preconfigured k-edge-connected structures in flexible bandwidth optical networks", Opt. Eng. 55(6), 066105 (Jun 07, 2016). ; http://dx.doi.org/10.1117/1.OE.55.6.066105


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