Let’s discuss about the required processes to execute the program based on network simulator 2 packages in Ubuntu.

Phase: I

          Firstly, we have to create the Ns2 main file in the project workspace location with the file extension .tcl.

• Ns2 program code for random position allocation to nodes

for {set i 0} {$i <  $val(nn) } { incr i } {

     set xx [expr {int(rand()*$val(x))}]

     set yy [expr {int(rand()*$val(y))}]

     $node_($i) set X_ $xx

     $node_($i) set Y_ $yy

     set nodeXpos($i) $xx

     set nodeYpos($i) $yy

     set nodeZpos($i) 0.0                     

}

• Ns2 program code for packet transmission

$ns attach-agent $node_($j) $udp

$ns attach-agent $node_($i) $null

$ns connect $udp $null

set cbr [new Application/Traffic/CBR]

$cbr attach-agent $udp

$cbr set packetSize_ 512

$cbr set interval_ 0.1

Phase: II

        Through the implementation of below mentioned commands in window terminal, we have to execute the Ns2 main file program in Ubuntu.

cd /home/research/Desktop/ns2_program_simulation

./ns Program.tcl