Optimal occupancy mapping of Virtual Networks over Elastic Optical infrastructures

One of the main challenges in Network Virtualization deals with the efficient mapping of virtual resources onto optical physical resources. This is commonly referred by Virtual Optical Network Embedding (VONE). The application of VONE for Elastic Optical Networks (EONs) has attracted the attention of industry due to the flexibility and higher transmission rates able to cope with the tremendous IP traffic demand from new applications and services. In this paper, we propose a linear model to solve the offline version of VONE over EON-based physical networks including physical layer impairments, intrinsic to the operation of EONs such as the transmission reach of robust modulation formats. Obtained results show that despite of the high complexity of the model, optimality can be reached to small and medium size instances of the problem.