Security-Aware Routing and Core Allocation in Elastic Optical Network with Multi-core

The routing, core allocation and spectrum assignment (RSA) problem in elastic optical networks with multi-core is a well-known NP-hard problem and the network information security is also an important problem in elastic optical networks. In this paper, we combine these two problems to investigate the routing, core allocation and spectrum assignment problem with the guaranteed secure level in elastic optical network with multi-core. We establish a new optimization model to determine an optimal routing, core allocation scheme with the guaranteed secure level by minimizing the maximum sequence number of frequency slots. To solve the model effectively, we propose a hybrid algorithm for routing and core allocation. First, the candidate secure paths, which can guarantee the required secure level for connection requests, are determined by using a heuristic algorithm. Then, to get an optimal routing and core allocation scheme, an effective genetic algorithm with a tailor-made crossover operator and a well-designed mutation operator is designed. Finally, simulation experiments are conducted, and the experimental results indicate that the effectiveness of the proposed model and algorithm.