All-optical core node modeling and optimization using hybrid wavelength conversion for QoS provision

Abstract

All-optical networks (AON) provide larger bandwidth, faster switching, and QoS provision. High-cost node architecture with full range wavelength converters (FRWC) is used to meet application and service demands. In this paper, hybrid wavelength converters (HDWC) and wavelength range (WR) supervision are considered. Fixed (FXWC), limited (LRWC), and FRWC are combined in the different output ports resulting in a new core node architecture design. The design depends on a node topology location and its ability to reduce WR usage while guaranteeing the needed demands. In wavelength converter (WC) combination, the core node architecture is optimized by defining the number and type of WC in the available output ports using physical topology and lightpath cost. In the WR reduction, the available resource is managed to extend the lightpath availability and assure jointly traffic switching and provision according to its loss and blocking delay. Simulation work is conducted where the achieved results indicate that the core node architecture cost is effectively reduced, and the available resource utilization is improved while offering traffic requirements.