Diverse routing in multi-domain optical networks with correlated and probabilistic multi-failures

Multi-failure network survivability is a key concern for operators owing to the recent spate of natural and man-made disasters. Hence this paper presents a new diverse lightpath protection scheme for random correlated failure recovery in multi-domain optical networks. The solution leverages topology abstraction and hierarchical inter-domain routing and assumes a-priori link failure probability state. The path computation process also takes into account both traffic engineering and risk minimization objectives. The proposed scheme is analyzed using network simulation for a variety of multi-failure scenarios.