Extend of my previous work. Consider stochastically TCP-friendliness that defined as:

\[X^\textrm{TCP} \le_U X^\pi \textrm{, if } E[u(X^\textrm{TCP})]\le E[u(X^\pi)] \forall u\in U\]

where \(\pi\) denotes the control for UDP traffic and \(X\) are the rates of a set of sessions; \(U\) is a set of utility function and the comparison \(\le\) is component-wise to the vector \(X\).

If \(U\) is defined as the set of all increasing functions (\(U=st\)), then the stochastic ordering \(X^\textrm{TCP} \le_{st} X^\pi\) is the usual stochastic order, which means

\[X^\textrm{TCP} \le_{st} X^\pi \Leftrightarrow Pr[X^\textrm{TCP} \le x] \ge Pr[X^\pi \le x]\]

The protocol in this paper, TCP-Friendly CBR-Like Rate Control or TFCBR, is not to apply admission control but to smooth the rate of sending to a longer time scale, say, minutes. There are two parameters in this scheme, namely, \(\alpha\) the fraction of TCP rate to send by the TFCBR; and \(\beta\) the time constant. The protocol checks TCP rate for previous \(\beta\) seconds using equation and adapt to the \(\alpha\) of that rate. Thus it is like a moving average and it claims that, by appropriately adjusting the parameters, it can be stochastically TCP-friendly.

The paper also points out, \(\alpha\) cannot be greater than 1 or otherwise it is not TCP-friendly at all.

Bibliographic data

   title = "TCP-Friendly CBR-Like Rate Control",
   author = "Feng and Xu",
   booktitle = "Proc ICNP",
   year = "2008",