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Explicit rate flow control for ABR services in ATM networks

By Ching-fong Su, Gustavo De Veciana and Jean Walrand


We propose a novel explicit rate-flow-control algorithm intended for available-bit-rate (ABR) service on an ATM net-work subject to loss and fairness constraints. The goal is to guarantee low cell loss in order to avoid throughput collapse due tore-transmission by higher level protocols. The mechanism draws on measuring the current queue length and bandwidth availability, as well as tracking tile current number of active sessions contending for capacity, to adjust an explicit bound on the source transmission rates. We identify the factors that affect queue overflows and propose simple design rules aimed at achieving transmission with controlled loss in a dynamic environment. We also discuss how conservative design rules might be relaxed by accounting for statistical multiplexing in bandwidth sharing among bursty ABR sources and variable-bit-rate (VBR) sources

Year: 2000
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