Analysis of source policy and its effects on TCP in rate-controlled ATM networks
IEEE/ACM Transactions on Networking (TON)
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This paper provides an analysis of the source policy in the rate-based congestion control algorithm being developed by the ATM Forum and derives approximate analytical closed-form expressions to describe the rate-increase process. These approximations are used to analyze the impact of the source algorithm on the TCP slow-start process operating over a rate-controlled ATM network where rate allocation is performed explicitly in the switches. The results show that the increase in TCP congestion window ramp-up time is noticeable when the round-trip delay is small. When the idle-detection policy is enabled at the source, the slow-start process is significantly prolonged, and results in slower recovery upon a cell loss. The results are verified by simulation.