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In this paper we address the problem of constrained optimization (ILP formulation) and propose a set of heuristic algorithms for assigning light-trails [1–4,7,10] to WDM ring networks to facilitate IP centric dynamic communication at the optical layer. A light-trail is a generalization of a lightpath such that multiple nodes can take part in communication(More)
Clos networks are an important class of switching networks due to their modular structure and much lower cost compared with crossbars. For routing I/O permutations of Clos networks, sequential routing algorithms are too slow, and all known parallel algorithms are not practical. We present the algorithm-hardware codesign of a unified fast parallel routing(More)
Given the increasing adoption of DWDM networking technology, there is now a growing need to address distributed inter-domain lightpath provisioning issues. Although inter-domain provisioning has been well studied for packet/cell-switching networks, the wavelength dimension presents many additional challenges. To address this challenge, a detailed(More)
Light-trails communication [1] proposes a solution for implementing a conceptual framework for IP centric communication in the optical domain which is a combination of node architecture and protocol for realizing efficient optical communications from IP bursts to dynamic lightpaths. In this paper we introduce a Light-trails solution that is applicable to(More)
The rapid growth of IP centric communication in worldwide networks and the parallel mass deployment of fiber based WDM networks have propelled IP over WDM being considered as an eventual solution for bandwidth on demand to customers. Contemporary optical networks are, however, based on lightpath communication and a lightpath represents end-to-end optical(More)
In this paper we propose an architecture and an algorithm for the realization of a pragmatic framework for optical packet transport. The architecture enables the transport of IP packets over optical frames in a network. While doing so, it relaxes the need for address recognition as well as for high speed switching, the two key hindering factors that have(More)
Light-trails are a promising candidate for grooming of traffic in the optical layer. We investigated the performance of light-trails via theory, simulation and experiment focusing on its efficiency. Introduction The growth of IP communication induces network dynamism that requires the optical layer to provide a high degree of re-configurability.(More)