• Chinese Optics Letters
  • Vol. 2, Issue 9, 09508 (2004)
Guolong Zhu*, Qingji Zeng, Tong Ye, and Junjie Yang
Author Affiliations
  • The State Key Laboratory on Fiber-optical Local Area Networks and Advanced Optical Communication Systems, Shanghai Jiao Tong University, Shanghai 200030
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    Guolong Zhu, Qingji Zeng, Tong Ye, Junjie Yang. Protection switching schemes of multi-granularity p-cycles in survivable WDM networks[J]. Chinese Optics Letters, 2004, 2(9): 09508 Copy Citation Text show less

    Abstract

    In this paper, a novel concept of multi-granularity p-cycle is proposed. In conventional p-cycle concept, all on-cycle spans have the same capacity. However, in multi-granularity p-cycle, each on-cycle span could have different capacity. Results show that multi-granularity p-cycles are much more capacity-efficient and cost-effective than conventional p-cycles. We also propose two protection switching schemes for all types of p-cycle networks. One is wrapping protection, in which only two end nodes do real-time switching when a span failure happens. The other is steering protection, in which at most four nodes do real-time switching when a span fails. In steering protection switching scheme, the restoration path for the failure traffic demand has the least hops.
    Guolong Zhu, Qingji Zeng, Tong Ye, Junjie Yang. Protection switching schemes of multi-granularity p-cycles in survivable WDM networks[J]. Chinese Optics Letters, 2004, 2(9): 09508
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