Figure 4
Figure 4: Congestion Window Size Evolution over Time
This shows the evolution of the congestion window size over time with and without the remembering mechanism and was done in the same conditions as Figure 1 simulating an HTTP session, no delay except that tcpdump could not be used to trace the congestion window size. Instead we took it directly from within the kernel in the fashion described in section 5.2 which was used to display captured window sizes. The size of the data sent during each TCP connection was 128 KB in order to increase the window size significantly in a short period of time. The x-axis is the time at which a packet was sent. The y-axis is the amount of packets sent together at that time, which amounts to the congestion window size. The lower curve shows the behavior of the conventional implementation of TCP while the upper curve shows what happens when the remembering mechanism is used.

Back to section 3