IP Networking

# 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(x) 1000 ;# X dimension of topology
set val(y) 1000 ;# Y dimension of topology
set val(cp) "" ;# node movement model file
set val(sc) "" ;# traffic model file
set val(ifqlen) 50 ;# max packet in ifq
set val(nn) 12 ;# number of mobilenodes
set val(seed) 0.0
set val(stop) 1000.0 ;# simulation time
set val(tr) exp.tr ;# trace file name
set val(rp) DSDV ;# routing protocol
set AgentTrace ON
set RouterTrace ON
set MacTrace OFF

Mac/802_11 set CWMin_                 31
Mac/802_11 set CWMax_                 1023
Mac/802_11 set SlotTime_              0.000020  ;# 20us
Mac/802_11 set SIFS_                  0.000010  ;# 10us
Mac/802_11 set PreambleLength_        144       ;# 144 bit
Mac/802_11 set ShortPreambleLength_   72        ;# 72 bit
Mac/802_11 set PreambleDataRate_      1.0e6     ;# 1Mbps
Mac/802_11 set PLCPHeaderLength_      48        ;# 48 bits
Mac/802_11 set PLCPDataRate_          1.0e6     ;# 1Mbps
Mac/802_11 set ShortPLCPDataRate_     2.0e6     ;# 2Mbps
Mac/802_11 set RTSThreshold_          3000      ;# bytes
Mac/802_11 set ShortRetryLimit_       7         ;# retransmissions
Mac/802_11 set LongRetryLimit_        4         ;# retransmissions
Mac/802_11 set newchipset_            false     ;# use new chipset, allowing a more recent
                                                ;# packet to be correctly received in place
                                                ;# of the first sensed packet
Mac/802_11 set dataRate_ 11Mb                   ;# 802.11 data transmission rate
Mac/802_11 set basicRate_ 1Mb                   ;# 802.11 basic transmission rate 
Mac/802_11 set aarf_ true                       ;# 802.11 Auto Rate Fallback

#-------Event scheduler object creation--------#

set ns              [new Simulator]

#creating the trace file and nam file

set tracefd       [open wireless1.tr w]
set namtrace      [open wireless1.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 black
            $ns at 0.0 "$node_($i) color black"
      }
           
# Provide initial location of mobilenodes
      $node_(0) set X_ 27.0
      $node_(0) set Y_ 260.0
      $node_(0) set Z_ 0.0

      $node_(1) set X_ 137.0
      $node_(1) set Y_ 348.0
      $node_(1) set Z_ 0.0

      $node_(2) set X_ 294.0
      $node_(2) set Y_ 235.0
      $node_(2) set Z_ 0.0

      $node_(3) set X_ 414.0
      $node_(3) set Y_ 342.0
      $node_(3) set Z_ 0.0

      $node_(4) set X_ 562.0
      $node_(4) set Y_ 267.0
      $node_(4) set Z_ 0.0

      $node_(5) set X_ 279.0
      $node_(5) set Y_ 447.0
      $node_(5) set Z_ 0.0

      $node_(6) set X_ -128.0
      $node_(6) set Y_ 260.0
      $node_(6) set Z_ 0.0

$node_(7) set X_ 727.0
$node_(7) set Y_ 269.0
$node_(7) set Z_ 0.0
     
$node_(8) set X_ 130.0
$node_(8) set Y_ 126.0
$node_(8) set Z_ 0.0

$node_(9) set X_ 318.0
$node_(9) set Y_ 45.0
$node_(9) set Z_ 0.0

$node_(10) set X_ 505.0
$node_(10) set Y_ 446.0
$node_(10) set Z_ 0.0

$node_(11) set X_ 421.0
$node_(11) set Y_ 158.0
$node_(11) set Z_ 0.0

 
#set up a UDP connection
set udp [new Agent/UDP]
$udp set fid_ 1
$udp set packetSize_ 1000
$ns attach-agent $node_(0) $udp
set null [new Agent/Null]
$ns attach-agent $node_(0) $null
$ns connect $udp $null  
#end


#set up a CBR over UDP connection
set cbr [new Application/Traffic/CBR]
$cbr attach-agent $udp
$cbr set type_ CBR
$cbr set packet_size_ 1000
$cbr set rate_ 11mb
$cbr set random_ false
$ns at 0.1 "$cbr start" 

#end


# 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 wireless1.nam &
}

puts "Starting Simulation..."

$ns run