Design and Analysis of Optical Flow-Switched Networks
Published in: Journal of Optical Communications and Networking, v. 19, no. 1, Aug. 2009, p. B81-B97
Posted on RAND.org on December 31, 2008
In this article we presented optical flow switching (OFS) as a key enabler of scalable future optical networks. We now address the design and analysis of OFS networks in a more comprehensive fashion. The contributions of this work, in particular, is in providing partial answers to the questions of how OFS networks can be implemented, how well they perform, and how their economics compare with those of other architectures. With respect to implementation, we present a sensible scheduling algorithm for inter-metropolitan-area- network (inter-MAN) OFS communication. Our performance study builds upon our work in IEEE J. Sel. Areas Commun., presented at the IEEE International Conference on Communications, Dresden, Germany, June 14-18, 2009, and includes a comparative capacity analysis for the wide area, as well as an analytical approximation of the throughput-delay trade-off offered by OFS for inter-MAN communication. Last, with regard to the economics of OFS, we extend our previous work from ECOC 2006 and GLOBECOM '06 in carrying out an optimized throughput-cost comparison of OFS with other prominent candidate architectures. Our conclusions indicate that OFS offers a significant advantage over other architectures in economic scalability. In particular, for sufficiently heavy traffic, OFS handles large transactions at far lower cost than other optical network architectures.