Elastic Optical Networks Survivability Based on Spectrum Utilization and ILP Model with Increasing Traffic

Abstract

Communication always demands growth in technologies to fulfill the requirement of bandwidth in a network. Requirements like multimedia, cloud services, high use of Internets which are exponentially increasing with respect to time. Due to this high requirement of bandwidth, it is always a challenge to maintain the survivability of the existing optical networks for a defined period. The existing network can handle the traffic within its certain limits on spectrum efficiency and data rate. These two parameters are most important to predict the survivability of the network for a long period to handle the traffic. Recent technologies are to provide better quality of service with flexible spectrum utilization and adaptive data rate in a network. The network with flexi grid in spectrum and the adaptive networking properties called elastic optical network (EONs) can improve spectrum efficiency. The paper focuses on parameters EONs by considering the spectrum utilizations and the presence of guardbands using integer linear program (ILP). The ILP returns the utilized slots with and without guardband at increased request demand in the networks. Finally, the methodology to calculate the spectrum utilization of the elastic networks discuss the survivability of the elastic optical network with guardband. The value of spectrum utilization factor with respect to the scaled traffic demand allows predicting the survivability of the existing networks.