Hybrid Inter-Cycle Switching (HICS) for Multiple Spans and Nodes Failure Restorability for P-Cycle Based WDM Networks

ABSTRACT

As earlier researchers discussed that there is an enormous insistence for designing optical transport networks in such a trend, so that it has enhanced utilization, reduced spare link capacity, minuscule path length and an escalated level of survivability, and the most promising technique used for the survivability of optical transport networks is inter-cycle switching (ICS) is one of the recent approaches that is based on idle p-cycles and is used for shortening the length of restoration path in faulty model but ICS model fails to protect multiple failure restoration at a time. Utilization of idle p-cycles degrades the inherent span and node failure restorability of failure in design model of pcycle, whereas ICS releases the maximum portion of conventional restoration path by utilizing a small segment of the idle p-cycle, but it had several glitches which were enhanced by several proposed methods, of which significant one is Inter-cycle Switching. In the proposed work the authors analyzed the performance of the Inter-cycle Switching and eliminated the snags hindering its performance. Overhear the authors have analyzed Hybrid Inter-cycle Switching (HICS) in various scenarios of multiple failures and have proposed a method for ensuring an effective and efficient restoration process in the event of span and node failure as well.

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