| nadeempitafi |
12-27-2012 04:05 PM |
NS2 Simulation/scenario help
HI
Im generating a NS2 scenario for vanets. the scenario is in this way,
for example I have 4 nodes,
0,1,2,3
Node zero will desiminate the data to Node 1, then Node 1 to Node 2, and Node 2 to three. I have made the scenario but in the Nam application its not happening. please help me im newbiew.
thanks all
here is code
Code:
#===================================
# Simulation parameters setup
#===================================
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) DSDV ;# routing protocol
set val(x) 1096 ;# X dimension of topography
set val(y) 474 ;# Y dimension of topography
set val(stop) 10.0 ;# time of simulation end
#===================================
# Initialization
#===================================
#Create a ns simulator
set ns [new Simulator]
#Setup topography object
set topo [new Topography]
$topo load_flatgrid $val(x) $val(y)
create-god $val(nn)
#Open the NS trace file
set tracefile [open out.tr w]
$ns trace-all $tracefile
#Open the NAM trace file
set namfile [open out.nam w]
$ns namtrace-all $namfile
$ns namtrace-all-wireless $namfile $val(x) $val(y)
set chan [new $val(chan)];#Create wireless channel
#===================================
# Mobile node parameter setup
#===================================
$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) \
-channel $chan \
-topoInstance $topo \
-agentTrace ON \
-routerTrace ON \
-macTrace ON \
-movementTrace ON
#===================================
# Nodes Definition
#===================================
#Create 3 nodes
set n0 [$ns node]
$n0 set X_ 225
$n0 set Y_ 374
$n0 set Z_ 0.0
$ns initial_node_pos $n0 20
set n1 [$ns node]
$n1 set X_ 588
$n1 set Y_ 353
$n1 set Z_ 0.0
$ns initial_node_pos $n1 20
set n2 [$ns node]
$n2 set X_ 996
$n2 set Y_ 344
$n2 set Z_ 0.0
$ns initial_node_pos $n2 20
#===================================
# Agents Definition
#===================================
#Setup a UDP connection
set udp0 [new Agent/UDP]
$ns attach-agent $n0 $udp0
set null2 [new Agent/Null]
$ns attach-agent $n2 $null2
$ns connect $udp0 $null2
$udp0 set packetSize_ 1500
#===================================
# Applications Definition
#===================================
#Setup a CBR Application over UDP connection
set cbr0 [new Application/Traffic/CBR]
$cbr0 attach-agent $udp0
$cbr0 set packetSize_ 1000
$cbr0 set rate_ 1.0Mb
$cbr0 set random_ null
$ns at 1.0 "$cbr0 start"
$ns at 2.0 "$cbr0 stop"
#===================================
# Termination
#===================================
#Define a 'finish' procedure
proc finish {} {
global ns tracefile namfile
$ns flush-trace
close $tracefile
close $namfile
exec nam out.nam &
exit 0
}
for {set i 0} {$i < $val(nn) } { incr i } {
$ns at $val(stop) "\$n$i reset"
}
$ns at $val(stop) "$ns nam-end-wireless $val(stop)"
$ns at $val(stop) "finish"
$ns at $val(stop) "puts \"done\" ; $ns halt"
$ns run
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