[ns] achieving bandwidth in wireless simulation

[Karthik Talloju]

Hi all,

code snippet:

Mac/802_11 set PLCPDataRate_      2.0e6;
Mac/802_11 set dataRate_          2.0e6;
Mac/802_11 set basicRate_         2.0e6;

Do the above lines of code in my tcl script mean that the available
bandwidth is 2Mbps ?
In my simulation I end up getting 1.23Mbps as the maximum throughput.
I understand that the throughput is supposed to turn up a little
lesser than the bandwidth available but isnt 1.2 Mbps a little too low ?
It would be great if anyone can explain whats going on. Thank you !

Karthik