The RBCMLSA problem on EONs with flexible transceivers

Next generation optical networks will require high levels of flexibility, being able to fit rate, bandwidth, modulation level, forward error correction (FEC) coding and optical reach requirements of different connections. For serving transmission on an elastic optical network, the flexible lightpath routing and the spectrum allocation algorithm for the connection request should be developed. In this paper, the routing, baud rate, FEC Coding, modulation level and spectrum allocation problem are defined and studied. An integer linear programming model is proposed to define the studied problem. Moreover, three heuristic algorithms, which integrate the single-path and multiple-path routing schemes, are also proposed to solve it. The proposed algorithms are examined through simulations, and the results show that the proposed algorithms can achieve good results.