Performance of ERICA and QFC for Transporting Bursty TCP Sources with Bursty Interfering Traffic

In ATM networks, the Available Bit Rate (ABR) service enables data sources to efficiently utilize network resources without adversely affecting the performance of non-ABR, guaranteed traffic such as video. Most research to date on ABR performance has not used realistic assumptions. Unrealistic assumptions such as persistent data sources and no nonABR traffic, as well as poor TCP models may lead to misleading results. In this paper, we address the above shortcomings of previous research. In a comparison of two major ABR schemes, the rate based ERICA and the credit based QFC, we find that the performance may be significantly better with QFC than previously thought when bursty traffic sources and bursty interfering traffic is considered. Keywords: TCP, ATM, ABR, ERICA, QFC, Internet