# A 100-node
example for ad-hoc simulation with AODV
# 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) 3 ;# 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) 150 ;# time of simulation
end
#-------Event
scheduler object creation--------#
set ns [new Simulator]
#Creating trace
file and nam file
set tracefd [open dsr.tr w]
set windowVsTime2
[open win.tr w]
set namtrace [open dsr.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)
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 $topo \
-agentTrace ON \
-routerTrace ON \
-macTrace OFF \
-movementTrace ON
for {set i 0} {$i < $val(nn) } { incr
i } {
set node_($i) [$ns node]
}
# Provide initial
location of mobilenodes
$node_(0) set X_
5.0
$node_(0) set Y_
5.0
$node_(0) set Z_
0.0
$node_(1) set X_
490.0
$node_(1) set Y_
285.0
$node_(1) set Z_
0.0
$node_(2) set X_
150.0
$node_(2) set Y_
240.0
$node_(2) set Z_
0.0
# Generation of
movements
$ns at 10.0
"$node_(0) setdest 250.0 250.0 3.0"
$ns at 15.0
"$node_(1) setdest 45.0 285.0 5.0"
$ns at 110.0
"$node_(0) setdest 480.0 300.0 5.0"
# Set a TCP
connection between node_(0) and node_(1)
set tcp [new
Agent/TCP/Newreno]
$tcp set class_ 2
set sink [new
Agent/TCPSink]
$ns attach-agent
$node_(0) $tcp
$ns attach-agent
$node_(1) $sink
$ns connect $tcp
$sink
set ftp [new
Application/FTP]
$ftp attach-agent
$tcp
$ns at 10.0
"$ftp start"
# Printing the
window size
proc plotWindow
{tcpSource file} {
global ns
set time 0.01
set now [$ns now]
set cwnd
[$tcpSource set cwnd_]
puts $file
"$now $cwnd"
$ns at [expr
$now+$time] "plotWindow $tcpSource $file" }
$ns at 10.1
"plotWindow $tcp $windowVsTime2"
# Define node
initial position in nam
for {set i 0} {$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 150.01
"puts \"end simulation\" ; $ns halt"
proc stop {} {
global ns tracefd namtrace
$ns flush-trace
close $tracefd
close $namtrace
exec nam dsr.nam
&
exit 0
}
$ns run
Output