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…

Installation of OMNeT++ in Linux Mint 16

This blog post shows the installation of OMNeT++ in Linux Mint 16 (Ubuntu 13.10) . Linux Mint 16 is just launched this week and Linux Mint is derived from the Base source of Ubuntu 13.10

Let us see, how to install OMNeT++ in Linux Mint.

My Settings

  • Used Linux Mint 16 (Petra) 32 Bit OS (As OMNeT++ libraries are mainly 32 bit libraries)
  • OMNeT++ Version 4.3
  • Unlike Windows 7 or 8, you need to download some extra softwares in Linux
You can also see the following link if you want to try OMNeT++ in Windows 7 or Windows 8.  http://www.nsnam.com/2013/12/installation-of-omnet-in-windows-8-and.html

1. Download the OMNeT++ package from this  URL http://www.omnetpp.org/omnetpp/doc_download/2266-omnet-431-source--ide-tgz
See the Screenshot below and Select the first link 
Omnet++
OMNeT++

2. Unzip it using the following command  
tar zxvf omnetpp-4.3.1.tgz
3. Install the following libraries 
sudo apt-get install build-essential autoconf automake libxmu-dev tcl tk tcl-dev tk-dev bison byacc swig zlib1g-dev flex 
4. The above download will take 40MB of software and will take time depending on your internet speed.
5. Go to the folder of OMNeT++ using the command
Prompt#] cd omnetpp-4.3.1
Prompt#] ./configure (This command will check for the necessary software included or not). Once succeeded, you need to set some PATH and TCL_LIBRARY Information.  See the Screenshot of my /home/pradeepkumar/.profile (if you are using Ubuntu, you may be having the .bashrc file instead of .profile). Here is the PATH information
export TCL_LIBRARY=/usr/share/tcltk/tcl8.5
export PATH=$PATH:/home/pradeepkumar/omnetpp-4.3.1/bin

Prompt#]  make

This make will take atleast 5 minutes to compile all the modules. 
LinuxMint
.profile file 

Once done,  open the software using the command omnetpp
Thats it!!!.

Leave your comments in the comments section below for any error message.


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