Analytic model for end-to-end packet based higher layer protocols over cell-based networks

An analytic model for an end-to-end acknowledgement and retransmission-based transport protocol with window flow control over a cell-based switch has been developed; acknowledgements are based on packets of multiple cells. Using this model the effect of packet size, window size, and buffer size on the effective throughput or goodput of on overloaded system, where N such end-to-end sources are multiplexed onto a cell-switch, is investigated. It is shown that, for fixed window size either very small or very large packets will have better goodput. For large window and large packets, increasing the buffer size at the cell-switch will actually decrease the goodput in the overloaded case