hi all
i am simulating a scenario where i have 5 nodes arranged in following order
2 4
0
1 3
the script of the file is
# 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) 5 ;# number of mobilenodes
set val(rp) DumbAgent ;# routing protocol
set val(x) 500;# X dimension of topography
set val(y) 500;# Y dimension of topography
set val(finish) 50;# time of simulation end
# ==
# Main Program
# ==
# Initialize Global Variables
set ns [new Simulator]
set tracefd [open tracefile.tr w]
set namtrace [open out.nam w]
$ns use-newtrace
$ns trace-all $tracefd
$ns namtrace-all-wireless $namtrace $val(x) $val(y)
# Define a 'finish' procedure
proc finish {} {
global ns tracefd namtrace
$ns flush-trace
close $tracefd
close $namtrace
exec nam out.nam
}
# Set up topography object
set topo [new Topography]
$topo load_flatgrid $val(x) $val(y)
# Create God
create-god $val(nn)
#Create channel
set chan_1 [new $val(chan)]
# Create the specified number of mobilenodes [$val(nn)] and attach them to
the channel.
# Here five nodes are created
# Configure 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) \
-channel $chan_1 \
-topoInstance $topo \
-agentTrace ON \
-routerTrace OFF \
-macTrace ON \
-movementTrace OFF \
Phy/WirelessPhy set CPThresh_ 10.0
Phy/WirelessPhy set CSThresh_ 1.55903e-11 ;#550m
Phy/WirelessPhy set RXThresh_ 3.65213e-10 ;#250m
Phy/WirelessPhy set bandwidth_ 1Mb
Phy/WirelessPhy set Pt_ 0.2818
Phy/WirelessPhy set freq_ 2.4e+9
Phy/WirelessPhy set L_ 1.0
#Antenna/OmniAntenna set X_ 0
#Antenna/OmniAntenna set Y_ 0
#Antenna/OmniAntenna set Z_ 0.25
Antenna/OmniAntenna set Gt_ 1
Antenna/OmniAntenna set Gr_ 1
Mac/802_11 set SlotTime_ 0.50;# 50us
Mac/802_11 set SIFS_ 0.28;# 28us
Mac/802_11 set DIFS_ 0.000128;# 128us
Mac/802_11 set PreambleLength_72 ;# 144 bit
Mac/802_11 set PLCPHeaderLength_ 48 ;# 48 bits
Mac/802_11 set PLCPDataRate_ 1.0e6 ;# 1Mbps
#Mac/802_11 set dataRate_ 1.0e6 ;# 1Mbps
#Mac/802_11 set basicRate_ 1.0e6 ;# 1Mbps
for {set i 0} {$i $val(nn) } {incr i} {
set node_($i) [$ns node]
$node_($i) random-motion 0 ;
}
# Provide initial (X,Y, for now Z=0) co-ordinates for mobilenodes
$node_(0) set X_ 150.0
$node_(0) set Y_ 200.0
$node_(0) set Z_ 0.0
$node_(1) set X_ 250.0
$node_(1) set Y_ 100.0
$node_(1) set Z_ 0.0
$node_(2) set X_ 50.0
$node_(2) set Y_ 300.0
$node_(2) set Z_ 0.0
$node_(3) set X_ 50.0
$node_(3) set Y_ 100.0
$node_(3) set Z_ 0.0
$node_(4) set X_ 250.0
$node_(4) set Y_ 300.0
$node_(4) set Z_ 0.0
# Setup traffic flow between nodes
# UDP connections between node_(2) and node_(3)
set udp [new Agent/UDP]
set sink [new Agent/Null]
$ns attach-agent $node_(2) $udp
$ns attach-agent $node_(3) $sink
$ns connect $udp $sink
set cbr [new Application/Traffic/CBR]
$cbr set packetSize_ 1024
$cbr attach-agent $udp
$ns at 1.0 $cbr start
# Define node initial position in nam
for { set i 0 } { $i $val(nn) } { incr i } {
$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(finish) $node_($i) reset;
}
# Ending nam and the simulation
$ns at $val(finish) $ns nam-end-wireless $val(finish)
$ns at $val(finish) finish
$ns at 50.01 puts \ns EXITING...\ ; $ns halt
puts Starting Simulation...
$ns run
the problem is in 802_11.cc file. actually there is adaptive fidelity
