Thursday, October 7, 2010

Network Simulator 2 script for a complex scenario


#This is an example for DSDV routing with 50 nodes in a 670*670 m2 area
#
# Note that all options listed in the beginning of the file could be initialized 
# with command line arguments by using "getopt $argc $argv"
# ======================================================================
# Default Script Options
# ======================================================================
set opt(chan)  Channel/WirelessChannel
set opt(prop)  Propagation/TwoRayGround
#set opt(netif)  NetIf/SharedMedia
set opt(netif)  Phy/WirelessPhy
#set opt(mac)  Mac/802_11
set opt(mac)  Mac/802_11
set opt(ifq)  Queue/DropTail/PriQueue
set opt(ll)  LL
set opt(ant)            Antenna/OmniAntenna

set opt(x)  670 ;# X dimension of the topography
set opt(y)  670  ;# Y dimension of the topography
set opt(cp)  "../mobility/scene/cbr-50-10-4-512"
set opt(sc)  "../mobility/scene/scen-670x670-50-600-20-0"

set opt(ifqlen)  50  ;# max packet in ifq
set opt(nn)  50  ;# number of nodes
set opt(seed)  0.0
set opt(stop)  1000.0  ;# simulation time
set opt(tr)  out.tr  ;# trace file
set opt(rp)             dsdv            ;# routing protocol script
set opt(lm)             "off"           ;# log movement

# ======================================================================

#set AgentTrace   ON
#set RouterTrace  ON
#set MacTrace   OFF     #useless code, the only way to toggle Mac trace on is to use node-config

LL set mindelay_  50us
LL set delay_   25us
LL set bandwidth_  0 ;# not used
LL set off_prune_  0 ;# not used
LL set off_CtrMcast_  0 ;# not used

Agent/Null set sport_  0
Agent/Null set dport_  0

Agent/CBR set sport_  0
Agent/CBR set dport_  0

Agent/TCPSink set sport_ 0
Agent/TCPSink set dport_ 0

Agent/TCP set sport_  0
Agent/TCP set dport_  0
Agent/TCP set packetSize_ 1460

Queue/DropTail/PriQueue set Prefer_Routing_Protocols    1

# unity gain, omni-directional antennas
# set up the antennas to be centered in the node and 1.5 meters above it
Antenna/OmniAntenna set X_ 0
Antenna/OmniAntenna set Y_ 0
Antenna/OmniAntenna set Z_ 1.5
Antenna/OmniAntenna set Gt_ 1.0
Antenna/OmniAntenna set Gr_ 1.0

# Initialize the SharedMedia interface with parameters to make
# it work like the 914MHz Lucent WaveLAN DSSS radio interface
Phy/WirelessPhy set CPThresh_ 10.0
Phy/WirelessPhy set CSThresh_ 1.559e-11
Phy/WirelessPhy set RXThresh_ 3.652e-10
Phy/WirelessPhy set Rb_ 2*1e6
Phy/WirelessPhy set Pt_ 0.2818
Phy/WirelessPhy set freq_ 914e+6 
Phy/WirelessPhy set L_ 1.0

# ======================================================================

proc usage { argv0 }  {
 puts "Usage: $argv0"
 puts "\tmandatory arguments:"
 puts "\t\t\[-x MAXX\] \[-y MAXY\]"
 puts "\toptional arguments:"
 puts "\t\t\[-cp conn pattern\] \[-sc scenario\] \[-nn nodes\]"
 puts "\t\t\[-seed seed\] \[-stop sec\] \[-tr tracefile\]\n"
}


proc getopt {argc argv} {
 global opt
 lappend optlist cp nn seed sc stop tr x y

 for {set i 0} {$i < $argc} {incr i} {
  set arg [lindex $argv $i]
  if {[string range $arg 0 0] != "-"} continue

  set name [string range $arg 1 end]
  set opt($name) [lindex $argv [expr $i+1]]
 }
}

proc cmu-trace { ttype atype node } {
 global ns_ tracefd

 if { $tracefd == "" } {
  return ""
 }
 set T [new CMUTrace/$ttype $atype]
 $T target [$ns_ set nullAgent_]
 $T attach $tracefd
        $T set src_ [$node id]

        $T node $node

 return $T
}




proc log-movement {} {
    global logtimer ns_ ns

    set ns $ns_
    source ../mobility/timer.tcl
    Class LogTimer -superclass Timer
    LogTimer instproc timeout {} {
 global opt node_;
 for {set i 0} {$i < $opt(nn)} {incr i} {
     $node_($i) log-movement
 }
 $self sched 0.1
    }

    set logtimer [new LogTimer]
    $logtimer sched 0.1
}

# ======================================================================
# Main Program
# ======================================================================
getopt $argc $argv

#
# Source External TCL Scripts
#
#source ../lib/ns-mobilenode.tcl

#if { $opt(rp) != "" } {
 #source ../mobility/$opt(rp).tcl
 #} elseif { [catch { set env(NS_PROTO_SCRIPT) } ] == 1 } {
 #puts "\nenvironment variable NS_PROTO_SCRIPT not set!\n"
 #exit
#} else {
 #puts "\n*** using script $env(NS_PROTO_SCRIPT)\n\n";
        #source $env(NS_PROTO_SCRIPT)
#}
#source ../lib/ns-cmutrace.tcl
source ../lib/ns-bsnode.tcl
source ../mobility/com.tcl

# do the get opt again incase the routing protocol file added some more
# options to look for
getopt $argc $argv

if { $opt(x) == 0 || $opt(y) == 0 } {
 usage $argv0
 exit 1
}

if {$opt(seed) > 0} {
 puts "Seeding Random number generator with $opt(seed)\n"
 ns-random $opt(seed)
}

#
# Initialize Global Variables
#
set ns_  [new Simulator]
set chan [new $opt(chan)]
set prop [new $opt(prop)]
set topo [new Topography]
set tracefd [open $opt(tr) w]

$topo load_flatgrid $opt(x) $opt(y)

$prop topography $topo

#
# Create God
#
create-god $opt(nn)


#
# log the mobile nodes movements if desired
#
if { $opt(lm) == "on" } {
    log-movement
}

 $ns_ node-config -macTrace ON


#
#  Create the specified number of nodes $opt(nn) and "attach" them
#  the channel.
#  Each routing protocol script is expected to have defined a proc
#  create-mobile-node that builds a mobile node and inserts it into the
#  array global $node_($i)
#

if { [string compare $opt(rp) "dsr"] == 0} { 
 for {set i 0} {$i < $opt(nn) } {incr i} {
  dsr-create-mobile-node $i
 }
} elseif { [string compare $opt(rp) "dsdv"] == 0} { 
 for {set i 0} {$i < $opt(nn) } {incr i} {
  dsdv-create-mobile-node $i
 }
}



#
# Source the Connection and Movement scripts
#
if { $opt(cp) == "" } {
 puts "*** NOTE: no connection pattern specified."
        set opt(cp) "none"
} else {
 puts "Loading connection pattern..."
 source $opt(cp)
}


#
# Tell all the nodes when the simulation ends
#
for {set i 0} {$i < $opt(nn) } {incr i} {
    $ns_ at $opt(stop).000000001 "$node_($i) reset";
}
$ns_ at $opt(stop).00000001 "puts \"NS EXITING...\" ; $ns_ halt"


if { $opt(sc) == "" } {
 puts "*** NOTE: no scenario file specified."
        set opt(sc) "none"
} else {
 puts "Loading scenario file..."
 source $opt(sc)
 puts "Load complete..."
}

puts $tracefd "M 0.0 nn $opt(nn) x $opt(x) y $opt(y) rp $opt(rp)"
puts $tracefd "M 0.0 sc $opt(sc) cp $opt(cp) seed $opt(seed)"
puts $tracefd "M 0.0 prop $opt(prop) ant $opt(ant)"

puts "Starting Simulation..."
$ns_ run

1 comment:

kruti said...

Hi,
I am trying to simulate 50 nodes in ns2 using DSDV for 2000 sec. My simulations stops abruptly at 1207 sec. What could be the reason? Same thing happens with 75 nodes too.