Tolerância a falha em redes ópticas de nova geração

Abstract

Availability is of considerable concern for network designers due to the increasing importance of the information that pass through them, motivating the providers of telecommunications services to improve the capacity and the quality of their backbones. Optical networks that use WDM ("Wavelength Division Multiplexing") usually present control plane based in GMPLS (Generalized Multiprotocol Label Switching) architecture, because it provides one better adequation between IP protocol and the optical layer. This work makes a comparative study, between the mechanisms used for the traditional optical networks and the said ones of next generation. It considers the adoption of different mechanisms of fault tolerance in function of the traffic model, through simulations, In the networks implemented by SDH/SONET architecture and simulation in computer of the main mechanisms offered for the multilayer model IP-GMPLS/WDM to provide protection and restoration of connectivity in next-generation optical networks, being objectified to authenticate our proposal.