Capacity performance of dynamic provisioning in optical networks

This paper describes an architecture and analyzes the performance of dynami c provisioning of lightpaths in an optical network,In dynamic provisioning, a lightpath is set up in real-time without rearranging the working and pro tection routes of existing lightpaths, and without the knowledge of future lightpath provisioning events. This paper develops a general model of the p hysical topology of the optical network, and outlines routing approaches fo r dynamic provisioning of lightpaths, It analyzes via simulations the perfo rmance of dynamically provisioned unprotected, 1 + 1 protected and mesh-res tored lightpaths, The analysis of the efficiency of network utilization of dynamic provisioning focuses on the spare capacity needed for protection, a nd in particular focuses on the impact of sharing of wavelength channels fo r mesh-restored lightpaths, The main conclusion from the performance studie s is that significant capacity gains are achieved with sharing of wavelengt h-channels for mesh-restored lightpaths with dynamic provisioning even for sparse topologies, and even at moderate loads.