Checking on how different TCP variants perform in NS2 simulation.
Completely based on paper “Simulation-based Comparisons of Tahoe, Reno, and SACK TCP” by Kevin Fall & Sally Floyd.
Simulate the network topology used by Fall and Floyd in their paper:
Running simulations: (scripts, simulator code and output are attached)
Example: <TCP_TYPE> TCP - packet loss <no% of packet loss>:
- Go in to tahoe folder and run ‘ns tcp_drop_tahoe.tcl <no% of packet loss>’
- Based on <no% of packet loss> the output files will be created in the appropriate folder
- Go in to the appropriate folder and run
cat out.tr | ../../Utils/packageplot.pl <TCP_TYPE>. It must have created three output files (ack.tahoe, dropped.tahoe, sent.tahoe) - Go into gnuplot terminal by running
gnuplot - Run the commands to plot the dropped packets, send packets and ack packets in graph and save as image
gnuplot
plot [0:6] "sent.tahoe" with points,"dropped.tahoe", "ack.tahoe" with dots
set terminal pngcairo
set output 'output.png'
replot
unset output
- For calculating avg.throughput and number of packets run
perl ../../Utils/throughputCalculator.pl out.tr 4 0.0 4.0 1.0
- For additional details, go to the site http://www.jgyan.com/analyzer/ and upload out.nam file