Cost-benefit analysis of WDM optical network simultaneously using waveband grooming and wavelength conversion

In this paper we present a cost-benefit analysis of WDM optical network based on the cost of node architecture and on the quantity of successful connection requests. The network nodes are capable of performing all optical waveband grooming and wavelength conversion and electronic traffic grooming. The approach includes a connection admission control based on the bandwidth capacity of connection requests and on the first-fit algorithm. Computer simulations were performed using the topology of the NSFNet considering several scenarios of bandwidth capacity and node architectures. Results attest the usefulness of the proposed approach to select node architecture to match cost to accepted connections.