Design issues of optical IP routers for Internet backbone applications

The rapid increase of the Internet traffic is pushing the deployment of WDM technology in the next-generation high-speed Internet backbone. Routers in the backbone could still be the potential bottleneck. In this article we consider some design issues of high-throughput optical routers which combine the advantages of WDM with the new optical switching technology. We first introduce the proposed Internet architecture based on the optical burst switching mechanism. Some important design issues in optical buffering and control function will be addressed which are expected to have significant effects on router performance. Numerical results of a simulation study are also presented along with discussions.