On the efficiency of inter-domain state advertising in multi-domain networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Enhanced crankback for lightpath setup in multi-domain optical networks
IEEE Communications Letters
OBGP+: An improved path-vector protocol for multi-domain optical networks
Optical Switching and Networking
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The design of the control plane model for multidomain optical networks poses complex challenges and introduces many open problems. Some initiatives have proposed optical BGP (OBGP), which is an extension of BGP supporting the advertisement and signaling of optical information between routing domains. We argue, however, that future optical networks offer the opportunity to avoid inheriting the limitations of BGP, especially in terms of routing and traffic engineering control. In this article we present a route control model replacing BGP/OBGP. Extensive simulations confirm that our route control model is able to drastically reduce the blocking experienced with OBGP, and this can be accomplished without increasing the number or frequency of routing updates exchanged between domains.