Calculate throughput in NS-2

Following awk file will calculate the throughput with running time (throughput versus time).
The following code will count all the received application packets in a network such that we can calculated the network throughput. If a throughput of a specific node has to be calculated, then we can simply add the node_id in the if condition.

The code simply prints the observed throughput during the time_interval through out the simulation time. We can change the time_interval variable according to our requirements.

In the following code:

• packet_size * recv * 8.0 gives the total number of bits received. Packet size is the size of packed used in Application layer.
• diving the value by 1000 gives us the throughput in kbps.

#============================= throughput.awk ========================

BEGIN {
recv=0;
gotime = 1;
time = 0;
packet_size = 50;
time_interval=2;
}
#body
{
       event = $1
             time = $2
             node_id = $3
             level = $4
             pktType = $7

if(time>gotime) {

print gotime, (packet_size * recv * 8.0)/1000; #packet size * ... gives results in kbps
gotime+= time_interval;
recv=0;
}

#============= CALCULATE throughput=================

if (( event == "r") && ( pktType == "cbr" ) && ( level=="AGT" ))
{
recv++;
}

} #body


END {
;
}
#============================= Ends ============================

Graph generated by above awk script.

P.S: feel free to contact me for any help.