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…

NS2 Scenario Generator

If you are tired of writing code using .tcl files, here is a solution for that. This software is a little bit old, as it released sometime during 2007, still some of the students/Researchers are not aware of this software.
So, you need not waste your time in editing the tcl files. And since this software is written in java, it works well with almost any Operating System (With JRE installed on the System)

You can download the software from this link https://sites.google.com/site/pengjungwu/nsg
Some features of this software

  1. wired and wireless nodes will be created
  2. establish connection between the nodes
  3. Creating links (Duplex-Link and Simplex-Link)
  4. TCP and UDP agents are supported
  5. Creating applications (CBR and FTP)
  6. Node movement
And still there are lot more as the developer of this software is actively maintaining the software and you can expect lot more in the future also.

You can download the software from this link directly. https://sites.google.com/site/pengjungwu/nsg/NSG2.1.jar?attredirects=0

To run this file, type the command in any OS
java -jar NSG2.1.jar

Here is the screenshot of the Application

NSG

NSG2.1


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