SLiT (Strongly connected Light-Trail) for WDM Rings

Abstract

Light-trail as a candidate for dynamic provisioning and sub-wavelength grooming has been investigated before. A lighttrail is an example of an intelligent unidirectional wavelength bus. In this article, we extend the conceptual advantages of lighttrails to a bidirectional wavelength bus, which we call as SLiT or Strongly connected Light-trails. We investigate and propose new node architecture for demonstration of SLiTs in a WDM ring network. To enable communication in a SLiT network we propose a stable and convergent protocol for dynamic bandwidth arbitration as well as for governing the virtual topology. We compare the performance of SLiT networks with light-trail network and other contemporary solutions through a simulations study.

Heuristic and optimal techniques for light-trail assignment in optical ring WDM networks

“…The light-trail assignment problem is analogous to the bin packing problem [2,6] with a slight modification, of aligning the flows within each light-trail (bin) under the constraint that a light-trail is a unidirectional bus and has limited capacity (packing). Literature from other authors on lighttrails is available in [11][12][13] and the references therein.…”