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Thomas DEFANTI Maxine BROWN Jason LEIGH Oliver YU Eric HE Joel MAMBRETTI David LILLETHUN Jeremy WEINBERGER
The OptIPuter is a radical distributed visualization, teleimmersion, data mining and computing architecture. Observing that the exponential growth rates in bandwidth and storage are now much higher than Moore's Law, this major new project of several universities--currently six in the US and one in Amsterdam--exploits a new world of computing in which the central architectural element is optical networking. This transition is caused by the use of parallelism, as in supercomputing a decade ago. However, this time the parallelism is in multiple wavelengths of light, or lambdas, on single optical fibers, creating a LambdaGrid. Providing applications-centric middleware to control the LambdaGrid on a regional and global scale is a key goal of the OptIPuter and StarLight Optical Switching projects.
Daisuke TANIGUCHI Takeshi NOJIMA Toshio KOGA Fukashi KAMIKAWA
In this paper, we describe a routing method for path on SDH Network with digital cross-connect control, which is implemented in an automated path provisioning function. Excessive concentration of assigned time slots at particular links results in longer restoration time, which is needed to switch or reroute paths on failure link. We propose an optimization method to provision the shortest route considering deconcentration of time slots assigned on each link. After defining LP-based formulation for path routing, we carried out computer simulation study for restoration performance on sample networks, assuming each restoration process for paths on failure link is executed one after another. Mean restoration time by our proposed method has reduced to a great extent compared to a basic routing method. It has been proven that the proposed method can realize effective use of resources and faster restoration time, and can be utilized in commercial systems.