Document Type

Conference Proceeding


IEEE Communication Society


Computing, Health and Science


Engineering and Mathematics, Centre for Communications Engineering Research




This conference paper was originally published as: Lo, K. , Habibi, D. , Phung, Q. , Rassau, A. M., & Nguyen, H. N. (2006). Efficient p-Cycle Design by Heuristic p-Cycle Selection and Refinement for Servivable WDM Mesh Networks. Proceedings of IEEE Global Telecommunications Conference (GLOBECOM). (pp. 1-5). San Francisco, USA. IEEE Communication Society. Original article available here

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Using p-Cycles to protect against single span failures in Wavelength-Division Multiplexing (WDM) networks has been widely studied. p-Cycle retains not only the speed of ring-like restoration, but also achieves the capacity efficiency over mesh networks. However, in selecting an optimal set of p-cycles to achieve the minimum spare capacity and fast computational time is an NP-hard problem. To address this issue, we propose a heuristic approach to iteratively select and refine a set of p-cycles, which contains two algorithms: the Heuristic p-Cycle Selection (HPS) algorithm, and the Refine Selected Cycles (RSC) algorithm. Our simulation results show that the proposed approach is within 3.5% redundancy difference from the optimal solution with very fast computation time even for large networks.



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