Networking

Routing and Wavelength Assignment and Survivability of Optical Channels in Ultra-high Speed IP over DWDM Networks Under Constraints of Residual Dispersion and Nonlinear Effects

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Executive Summary

What are the essential components of next generation optical networking? In an attempt to answer this question, this paper discusses ultra-high speed 10Gb/s and 40 Gb/s optical Ethernet and/or SONET transmission carrying multi-wavelength channels along with IP over WDM. The strengths of future optical networking, these are solutions for very high speed transmission and networking. This paper looks at the impact of residual dispersion and their effects on optically multiplexed channels. These are to be routed over terrestrial or metropolitan all-optical dense wavelength networks. The paper takes into account a routing algorithm that has the ability to integrate the layers of the networks with the physical trans-mission layer. This algorithm also considers the network wavelength channel management layer and the routers for connecting along with routing of wavelength channels over physical lightpaths. These, the paper suggests, are under constraints of wavelength availability, transmission capacity of the lightpath and the dispersion effects over the routed hops. What they call the Hop and Bandwidth Integrated Routing (HBIR) algorithm integrates bandwidth availability and the routing hops of the light path to be able to provide for routing of lightpaths in a layered graph model. Ethernet traffics have always been transported over technologies such as SONET/SDH via Ethernet interfaces. The Ethernet traffics are then converted to SDH frames under the time-division multiplexing protocol.

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