Description:
Eight wireless nodes are created and they are configured with specific parameters of a mobile wireless node. After creating the nam file and trace file, we set up topography object. set node_ ($i) [$ns node] is used to create the nodes. Location of the nodes is fixed by specifying X, Y coordinates. Z coordinate is always zero. Here we set the initial size for the every node by using initial_node_pos. AODV routing protocol is used here. $val(stop) specifies the end time of the simulation. In this program nodes are given with cyan color
code:-
# Define options
set val(chan) Channel/WirelessChannel ;# channel type
set val(prop) Propagation/TwoRayGround ;# radio-propagation model
set val(netif) Phy/WirelessPhy ;# network interface type
set val(mac) Mac/802_11 ;# MAC type
set val(ifq) Queue/DropTail/PriQueue ;# interface queue type
set val(ll) LL ;# link layer type
set val(ant) Antenna/OmniAntenna ;# antenna model
set val(ifqlen) 50 ;# max packet in ifq
set val(nn) 2 ;# number of mobilenodes
set val(rp) AODV ;# routing protocol
set val(x) 500 ;# X dimension of topography
set val(y) 400 ;# Y dimension of topography
set val(stop) 10.0 ;# time of simulation end
#-------Event scheduler object creation--------#
set ns [new Simulator]
#Creating trace file and nam file.
set tracefd [open wireless2.tr w]
set namtrace [open wireless2.nam w]
$ns trace-all $tracefd
$ns namtrace-all-wireless $namtrace $val(x) $val(y)
# set up topography object
set topo [new Topography]
$topo load_flatgrid $val(x) $val(y)
set god_ [create-god $val(nn)]
# configure the nodes
$ns node-config -adhocRouting $val(rp) \
-llType $val(ll) \
-macType $val(mac) \
-ifqType $val(ifq) \
-ifqLen $val(ifqlen) \
-antType $val(ant) \
-propType $val(prop) \
-phyType $val(netif) \
-channelType $val(chan) \
-topoInstance $topo \
-agentTrace ON \
-routerTrace ON \
-macTrace OFF \
-movementTrace ON
# Creating node objects..
for {set i 0} {$i < $val(nn) } { incr i } {
set node_($i) [$ns node]
}
for {set i 0} {$i < $val(nn) } {incr i } {
$node_($i) color cyan
$ns at 0.0 "$node_($i) color cyan"
}
# Provide initial location of mobilenodes
$node_(0) set X_ 5.0
$node_(0) set Y_ 30.0
$node_(0) set Z_ 0.0
$node_(1) set X_ 50.0
$node_(1) set Y_ 25.0
$node_(1) set Z_ 0.0
$node_(2) set X_ 200.0
$node_(2) set Y_ 90.0
$node_(2) set Z_ 0.0
$node_(3) set X_ 350.0
$node_(3) set Y_ 160.0
$node_(3) set Z_ 0.0
$node_(4) set X_ 100.0
$node_(4) set Y_ 250.0
$node_(4) set Z_ 0.0
$node_(5) set X_ 300.0
$node_(5) set Y_ 100.0
$node_(5) set Z_ 0.0
$node_(6) set X_ 400.0
$node_(6) set Y_ 350.0
$node_(6) set Z_ 0.0
$node_(7) set X_ 3s50.0
$node_(7) set Y_ 470.0
$node_(7) set Z_ 0.0
# Define node initial position in nam
for {set i 0} {$i < $val(nn)} { incr i } {
# 30 defines the node size for nam
$ns initial_node_pos $node_($i) 30
}
# Telling nodes when the simulation ends
for {set i 0} {$i < $val(nn) } { incr i } {
$ns at $val(stop) "$node_($i) reset";
}
# ending nam and the simulation
$ns at $val(stop) "$ns nam-end-wireless $val(stop)"
$ns at $val(stop) "stop"
$ns at 10.01 "puts \"end simulation\" ; $ns halt"
proc stop {} {
global ns tracefd namtrace
$ns flush-trace
close $tracefd
close $namtrace
exec nam wireless2.nam &
}
$ns run
# How to run the program
$ns wireless2.tcl
