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The ever-growing demand of network capacity has resulted in the inception of Optical Burst Switching (OBS), offering alloptical transmission, high-speed data rates, and format-transparent switching. However, the current OBS architecture is very complex, requiring costly fiber delay lines and quality-of-service (QoS) management techniques. In this paper, we propose a new OBS architecture based on photonic container switching to be deployed in the core network. We show that our architecture will solve most of the complexities of existing OBS mechanisms and, in fact, will make the core an all-optical zero-packet-loss network that will also guarantee equal QoS to all of the users. The packets are actually packed in fixed-size containers, which will be converted into an optical burst and transmitted through the network. Obviously, a major issue to solve in our architecture is the scheduler design that ensures zero packet loss and no optical-to-electrical switchings in the intermediate nodes. We devise a divide-and-conquer solution for the scheduler design problem and present some efficient algorithms for the same. We also analyze the performance of our algorithms under varying traffic conditions and network topologies to ascertain their efficiency and robustness.
Network topology design, optical burst switching, nonpreemptive/preemptive scheduling, cyclic shift scheduling
Kalyan Basu, Preetam Ghosh, Sajal Das, "A Novel Photonic Container Switched Architecture and Scheduler to Design the Core Transport Network", IEEE Transactions on Computers, vol. 56, no. , pp. 1087-1104, August 2007, doi:10.1109/TC.2007.1061
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