Networking Investigate

Comparison of Packet Switch Architectures and Pacing Algorithms for Very Small Optical RAM

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Executive Summary

One of the difficulties with Optical Packet Switched (OPS) networks is buffering optical packets in the network. The research on optical RAM presently being done is not expected to achieve a large capacity soon. However, the burstiness of Internet traffic causes high packet drop rates and low utilization in small buffered OPS networks. In this paper, the authors investigate and compare optical-buffered switch architectures and pacing algorithms for minimizing the buffer requirements of OPS switches. They simulate two mesh topologies (NSFNET and Abilene) for goodput and packet drop rate comparisons and optimization of XCP parameters.

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