Performance Evaluation of Selected Packet Dispatching Schemes for the CBC Switches

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Executive Summary

The CBC stands for the Central-stage Buffered Clos-network. This kind of switching fabric was proposed and theoretically evaluated by F. Wang and M. Hamdi. In this paper new packet dispatching schemes for the CBC switches are proposed and evaluated. The authors study three such schemes, called RGNA (Request - Grant with No Association), RGAM (Request - Grant with Associated output Modules), and RGAP (Request - Grant with Associated output Ports). Their research is aimed at finding an answer to the question: what kind of packet dispatching scheme should be used in the CBC switch to achieve very good performance in terms of throughput, cell delay and central buffers size.

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