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…

About Me

T S Pradeepkumar is a professor from VIT University, holds a Bachelors (Electrical & Electronics)and Masters degree in Embedded system Technologies. Pradeepkumar though from a electrical engineering background, he is interested towards open source technologies and tools for engineering applications and domains.

He authors this blog and currently he is concentrating on open source tools, open source programming and open source technologies like Network Simulator 2, java, moodle, drupal, wordpress, linux, kernel programming, etc.

Initially he started publishing lecture notes for his students on subjects like embedded systems, real time systems, digital electronics, C programming, linux kernel programming, PHP/MySQL.

In future, he is planning to upload video lectures and tutorials for various courses and tools.

Pradeepkumar visited many places in the country (India) for delivering lectures on Network Simulator 2 for Research in wireless technologies. He is currently doing his doctorate in Wireless Sensor Networks.

He can be contacted at : tspembedded at gmail dot com

NS2 Workshops Conducted between 2007 - 2013

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