Ecien t Dynamic Trac Grooming in Service-dieren tiated WDM Mesh Networks ?

In this paper, we address the issue of trac grooming in arbitrary WDM mesh networks. We present a novel groomer architecture wherein a combination of grooming at two dieren t granularities is utilized to make the setup cost-eectiv e without compromising on eciency . We put forward an ecien t algorithm for dynamic routing and wavelength assignment of sub-wavelength connections. We also propose a means of rerouting connections dynamically to facilitate increase in the average call acceptance ratio. Rerouting in the dynamic scenario has never been considered before. The connections, which may have arbitrary bandwidth requirements, are considered to be service- dieren tiated based on the need for protection. We show the advantage of employing segmented backup in place of end-to-end backup as well as the benets of the rerouting mechanism we propose through extensive simulation results.