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In this paper, we systematically study a fundamental tradeoff for TCP friendliness: in order for a congestion control protocol to maintain a certain degree of TCP friendliness, the longer its smoothness timescale is, the lower its average sending rate should be. This throughput-smoothness tradeoff exists not only for the traditional definition of TCP friendliness but also for any congestion control...
While the current definition of TCP friendliness has enabled a wide variety of traffic control protocols other than TCP, it still considerably restricts the design space of TCP-friendly traffic control protocols. For example, some multimedia streaming applications prefer a smooth sending rate on a time scale of minutes, however, a UDP flow maintaining a smooth sending rate on such a long time scale...
The definition of TCP friendliness has been evolved over time from the traditional one for congestion control protocols to the recent ones for admission control protocols. All of them can effectively prevent the Internet from congestion collapse and TCP starvation, while enabling a wide variety of traffic control protocols other than TCP. However, the current TCP-friendly admission control protocols...
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