Performance of fast TCP in multi-agent systems

In this paper, the performance between RFC compatible normal TCP and several speed constraints ignored fast TCP is compared. To do these, the main algorithms that constraints the transmit rate of TCP are removed. We, and also, have modified TCP protocol stack in a Linux kernel as a kind of agent system to compare the speeds between the standard TCP and our modified fast TCP. We find that if the destination agent is short distance away from the source agent and packet error is scarce then the speed differences between normal and fast TCP may be negligible. However, if the destination agent is far away from the source agent and slow start algorithm is not adopted then the transfer time for small file is different greatly. In addition, if packet error occurred frequently, our modified fast TCP is faster than the standard TCP regardless of distance.