Queuing Models in NS2

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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 NetAnim software for NS3 in Ubuntu 14.04

This post will tell you the installation instructions for NetAnim Software in Ubuntu.
NS3 is a discrete event simulator similar to ns2 and both vary depends on the languages in which they were used.
NS3 uses C++ with optional Python bindings, whereas ns2 uses OTCL with C++.
The ns2 comes with a default network animator called nam and it will be there in the allinone package of ns2.  But ns3 does not have any default animator, but there is a support from the NetAnim.

NetAnim is a software that process the xml files for graphical output which are generated through ns3. 

Method 1:
NetAnim can be downloaded from the URL http://code.nsnam.org/jabraham3/netanim-3.104

Method 2:
However, ubuntu or debian or Linux Mint solves this problem through apt-get itself.

Prerequisites:

  • NS3 compiled (or installed) 
  • OS Used: Ubuntu 14.04 64 bit
  • NS3 Version (ns-3.20)


pradeepkumar@pradeepkumar~$ sudo apt-get install NetAnim 
The above command is case sensitive (NetAnim)

To run once its installed
pradeepkumar@pradeepkumar:~$ NetAnim file.xml
if you already has a file.xml. 

Here are the screenshots 
NetAnim
NetAnim in Ubuntu 14.04

NetAnim
NetAnim in Ubuntu 14.04


T S Pradeep Kumar

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