Power-Efficient p-Cycle Protection with Power Conscious Routing in Elastic Optical Networks

Abstract

With rapid increase in power consumption in information and communication technology (ICT], there is need of power-efficient solutions in telecom networks. Elastic optical networks (EONs), as spectrum efficient and flexibility in bandwidth, are also major contributor in the overall power consumption. There is immense amount of data transmission in the network and any loss of data due to network failure can incur huge losses. In order to meet this high reliability requirement, network architectures are deployed with a large number of redundant resources to provide the backup protection. These redundant resources are also major contributor to overall power consumption. Shortest path routing (SPR) is employed in some power saving strategies. This paper considers power efficient protection with power conscious routing (PCR) in EONs against single link failure by using preconfigured cycles (p-cycles). An integer linear programme (ILP) has been developed to optimize total required power consumption. Optimization of power consumption is based on PCR and selection of p-cycle by maximizing number of idle network resources be put into sleep mode. Numerical results show that the power consumption during low traffic with PCR is lesser than SPR. In addition, it is seen that as the traffic increases, the power consumption saturates.