Queuing Models in NS2

Image
M/M/1 is a system with poisson arrival time, servicing exponentially and a queue of unlimited capacity and type of FIFO Queue. This is the simplest queuing system.  NS2 supports various distributions like pareto, exponential, constant, unifrom, etc to handle the network dynamics and metrics. So it is very easy to test the given network link to monitor a given queue using any of these queuing models. The listing 3 and 4 are monitoring the link when DropTail queue is used with a capacity of finite and infinite. Listing 13.3 uses infinite capacity and Listing 13.4 uses Finite capacity The output screen shot is shown below the scripts for further understanding
Listing 3 – M/M/1 Queuing Model #new Simulator creation set ns [new Simulator] #trace file creation for capturing the UDP data set tf [open out.tr w] $ns trace-all $tf
#setting the exponential distribution param set lambda 30.0 set mu     33.0
#creation of nodes set n1 [$ns node] set n2 [$ns node] #The queue limit is 1Lakh as the capacity is infin…

Installing PyViz in NS3

This post tells the method to install PyViz (or visualizer module) in ns3. Visualize is a module that shows the output in the form of animation and there are some packages need to be installed.
For installation of ns3, you may refer this link: http://www.nsnam.com/2014/08/ns3-installation-in-linux-mint-17.html
For another Animation NetAnim installation, follow this link: http://www.nsnam.com/2014/08/installing-netanim-software-for-ns3-in.html

Steps to install PyViz (visualizer)
1. Open the termina and execute the command one by one
pradeep@localhost $] sudo apt-get install python-dev python-kiwi python-pygoocanvas python-pygraphviz
pradeep@localhost $]  sudo apt-get install python-gnome2 python-gnomedesktop python-rsvg
Once installed, go to the ns-allinone-3.20 folder and execute this command 
pradeep@localhost $] cd ns-allinone-3.20
pradeep@localhost $] ./build.py --enable-examples --enable-tests

Thus "visualize" is installed successfully.
the general command to run the visualize is 
./waf --run myprogram --vis 
or
./waf --run myprogram --visualize

To see the output in the visualizer, here is the step
pradeep@localhost $] cd ns-allinone-3.20/ns-3.20
pradeep@localhost $] ./waf --run examples/tutorial/third --vis 
or 
pradeep@localhost $] ./waf --run examples/tutorial/third --visualize 
Here is the screenshot of the visualize.

PyViz
visualize on NS3






T S Pradeep Kumar

Popular posts from this blog

AWK Scripts for NS2 to process data from Trace Files

Xgraph

ns2 installation in Ubuntu 14.04