[ns] About TCP's RTT parameter

["Xiang" <ns@cdnet.edu.cn>]

Hi all,

I send this question again.

In my simulation, I have the network topology shown below:

    ----
    |s1|-----------
    ----   10 Mb   \
            5 ms    \
                     \----           ------          ----           ------
                      |e1|-----------|core|----------|e2|-----------|dest|
                     /----   10 Mb   ------   5 Mb   ----   10 Mb   ------
                    /         5 ms            5 ms           5 ms
    ----           /
     |s2|-----------
     ----   10 Mb
            5 ms

 

I attatch two TCP flows, TCP1 from s1 to dest, TCP2 from s2 to dest,I need to get

each TCP's RTT value in node e1 based on source-destination pair in my c++ program.

How can I do this? Please help me.

Thanks in advance.

Xiang