Queuing Models in NS2

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…

TinyOS Installation in Ubuntu 12.04 - IoT Perspective

This post tells you how to install TinyOS installation in Ubuntu 12.04 (I used this old OS as the tinyos 2.0.2 is released earlier and has the full support). However you can try installing in a recent OS also.  But prefer Ubunu with LTS support. 

OS Used: Ubuntu 12.04
Tiny OS Used: Pulled from git (an easier method to do the installation)

Tiny OS
NesC compiler installation 

$] sudo apt-get update
$] sudo apt-get install build-essential autoconf2.64 automake libxmu-dev flex bison emacs gperf
$] git clone git://github.com/tinyos/nesc.git
$] cd nesc/
$] ./Bootstrap
$] ./configure 
$] make
$] make install (If not working, then try sudo make install)

Tiny OS installation

$] git clone git://github.com/tinyos/tinyos-main.git
$] cd tinyos-main/tools
$] ./Bootstrap
$] ./configure
$] make
$] sudo make install

 T S Pradeep Kumar

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