OPTIMAL PROVISIONING OF OPTICAL NETWORKS WITH ASYMMETRIC NODES

DOI: 10.18173/2354-1059.2020-0046

Abstract

Wavelength Switched Optical Networks (WSONs) have been designed to take advantage of all optical switching fabrics with a high level of automation and efficiency. Therein, the Wavelength Selective Switches (WSS) represent the core switching elements with a technology enabling multi-degree Reconfigurable Optical Add\Drop Multiplexers (ROADM) architectures with colorless and directionless switching. In this paper, we propose an optimization model to establish the best ROADM switching connectivity to maximize the grade of service, for a given number of ports. We show that the grade of service can vary significantly, up to 30%, depending on the switching connectivity. Besides, the larger the network is, the more the variance increases: from 20% to 30%, when the number of nodes varies from 14 to 24.