A new node architecture for scalable wavelength label switching networks using MPLS

This paper presents a novel approach integrating recent advances in multiprotocol label switching (MPLS) traffic engineering with wavelength switch/routing technologies to achieve optical interconnect for IP-centric Data Networks. A new node architecture for scalable wavelength label switching networks (WLSnet) is proposed, which supports label switching and wavelength routing. This paper shows this network, which adds more flexible routing, traffic engineering, and explicit routes via MPLS, is the best way to realize optical interconnects and to reduce management complication and network cost. An approach to dynamically interconnect routers via wavelength is shown, including a bypass routing in the node; in this manner new wavelengths may easily be introduced into the network at a reasonable cost. This approach also paves the way for the eventual incorporation of DWDM multiplexing capabilities in IP routers, and establishes a preliminary framework for the notion of an optical Internet.