Hello,
First time poster here hoping to get some help with ns2.
I've recently started using ns2(first time user) but I'm having difficulty getting the results I'm after.
I am trying to set up a network with wireless nodes(5-15 nodes) and then use xgraph to display a timing diagram, including throughput and packet loss.
I have the initial code for the wireless nodes but the results are showing no throughput at. As I'm new to using and programming ns2, can anyone help with this? I can't see where I'm going wrong.
# 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