Dual-link failure covering in DWDM optical networks using genetic algorithms

Network resilience is a vital issue in the design of reliable next generation communication networks. The multi-link failure scenarios are practical models in survivable optical network applications where more than one link may fail during network operation. This paper presents a genetic algorithm based approach for dual-link failure coverage in resilient dense wavelength division multiplexing (DWDM) optical networks. Three link-disjoint lightpaths are established between O-D pairs in demand matrix using dedicated path protection (DPP) architecture. The first shortest lightpath is considered as working path and others are considered as redundant lightpaths to protect working path. Simulation results demonstrate efficiency of genetic algorithm to design fault tolerant optical mesh networks.