Experimental Evaluation of Memory Effects on TCP Traffic in Congested Networks
Today the Internet is a worldwide-interconnected computer
network that transmits data by packet switching based on the
TCP/IP protocol suite. Internet has TCP as the main protocol of
the transport layer. The performance of TCP is studied by many
researchers. They are trying to analytically characterizing the
throughput of TCP's congestion control mechanism. Internet
routers were widely believed to need big memory spaces.
Commercial routers today have huge packet memory spaces,
often storing millions of packets, under the assumption that big
memory spaces lead to good statistical multiplexing and hence
efficient use of expensive long-haul links.
In this paper, we summarize the works and present the
experimental study result with big memory space size and give a
qualitative analysis of the result. Our conclusion is that the,
round-trip time (RTT) is not increased by linear, but by quadric
when the memory space size of the bottleneck is big enough. Our
goal is to estimate the average queue length of the memory space
size and develop a TCP model based on RTT and the average
queue length.
Keywords: Traffic management, Congestion control, congestion
mechanism, congestion model, memory size
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