Significant Impact of P-cycles on Survivable WDM Optical Network

It is known that Wavelength division multiplexing (WDM) technique enables single fiber to carry huge amount of data but optical WDM networks are prone to failures, therefore survivability is a very important requirement in the design of optical networks. In this paper, a comprehensive review about survivability of WDM networks has been discussed focusing on scalable and efficient p-cycles resilience techniques and a comparative analysis particularly among ring and mesh resilience techniques has been performed. In the context of network survivability, p-cycle based schemes attracted extensive research interests as they maintain balance between recovery speed and capacity efficiency. It is observed that pcycles are key to obtain mesh-like network efficiency from a ring-like protection.