XCP-Based Transmission Control Mechanism for Optical Packet Switched Networks With Very Small Optical RAM

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Executive Summary

According to a famous rule-of-thumb, buffer size of each output link of a router should be set to bandwidth delay product of the network, in order to achieve high utilization with TCP flows. However, ultra high speed of optical networks makes it very hard to satisfy this rule-of-thumb, especially with limited choices of buffering in the optical domain, because optical RAM is under research and it is not expected to have a large capacity, soon. In this paper, the authors evaluate the performance of their explicit congestion control protocol-based architecture designed for very small Optical RAM-buffered optical packet switched wavelength division multiplexing networks with pacing at edge nodes in order to decrease the required buffer size at core nodes.

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