Dynamic protection using integrated-routing approach in IP-over-WDM networks

Abstract

This paper presents an efficient protection scheme to dynamically allocate restorable bandwidth-guaranteed paths in integrated IP-over-wavelength division multiplexing (WDM) networks. A restorable bandwidth-guaranteed path implies an active path and another link-disjoint backup path both with the required bandwidth. In this paper, we propose two integrated-routing algorithms: hop-based integrated-routing algorithm (HIRA) and bandwidth-based integrated-routing algorithm (BIRA) to allocate the paths. We use connection blocking probability and number of optical-electrical-optical (o-e-o) conversions as performance metrics. Through extensive simulation experiments, we demonstrate that our algorithms perform better than other existing approaches. © 2003 Elsevier B.V. All rights reserved.