Using dynamic optical networking for high-speed access

While LAN and wide-area network link capacities keep increasing, access links from enterprises are still bottlenecks. In this paper, we propose a networking solution to improve the access link rate seen by an enterprise user. The solution is developed in the context of existing constraints, such as the presence of ring based metropolitan area access and core networks, and Ethernet cards in end hosts. Our proposal enables the use of hybrid Ethernet-optical access circuits set up and released on demand. Through the use of switched optical circuits the number of hosts that can be supported on a metropolitan area core ring network can be increased significantly at an acceptable grade of service. Through analysis, we demonstrate these increases. For example, at a traffic load of 50%, an increase in the number of hosts (or correspondingly the access rate seen by a user) of 131% is possible on a core OC48 ring at a negligible mean waiting time (1ms).

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