A heuristic solution for high-performance lightpath set-up procedure in wavelength-routing optical networks

In this paper, we propose a novel heuristic, routing and wavelength assignment algorithm (RWA), called congestion avoidance and lambda-run-based (CALR) algorithm, that offers very good performance in terms of blocking probability in WDM networks with limited-wavelength-converting capacity. Lightpaths for all connection requests in the network can be set up and released on-demand. The analytical and simulation results show that the proposed CALR algorithm ensures a much lower blocking probability than other previously proposed algorithms.