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[ns] Simulating Ad-hoc networks on 2.1b8
Hi:
I'm a beginner trying to simulate ad-hoc networks. I'm using the 2.1b8
version of ns (all-in-one) on a PC running Red Hat 7.0, I also tried to
run the scripts on SunOS 5.8 machines.
The problem is that when I use NAM I can see the nodes but they don't
move. On the previous versions of ns the script was running fine.
Could you please help me with these questions:
1) Can this version of NAM support node mobility? I mean, was I supposed
to run my ad hoc scripts without any problem (i.e. watch the nodes
moving)?
2) Do you have a really small sample script (2 nodes) that you know is
working for v 2.1b8 that you can email me? I have tried
the ones that come with the all-in-one and one posted previously in
this mailing list without success.
3) while running nam I get lots of this error :
Unexpected end of line in: + -t 19.289389561 -s 0 -d 2 -p tcp -e 1028 -c 2
-a 0 -i 7475 -k RTR
Perhaps you have extra spaces at the end of the line.
Last parsed attribute flag was -k
Thankx,
Marco
************************ THIS IS THE SCRIPT
********************************
# ======================================================================
# 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) 500 ;# X dimension of the topography
set val(y) 500 ;# Y dimension of the topography
set val(ifqlen) 50 ;# max packet in ifq
set val(nn) 5 ;# number of mobilenodes
set val(rp) DSR ;# routing protocol
# ======================================================================
# Main Program
# ======================================================================
#
# Initialize Global Variables
#
set ns_ [new Simulator]
# set up topography object
set topo [new Topography]
# create trace object for ns and nam
set tracefd [open simple-wireless-out.tr w]
set namtrace [open simple-wireless-out.nam w]
$ns_ trace-all $tracefd
$ns_ namtrace-all-wireless $namtrace $val(x) $val(y)
$topo load_flatgrid $val(x) $val(y)
#
# Create God
#
create-god $val(nn)
#
# Create the specified number of mobilenodes [$val(nn)] and "attach" them
# to the channel.
# Here two nodes are created : node(0) and node(1)
# configure node
$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 $topo \
-agentTrace ON \
-routerTrace ON \
-macTrace OFF \
for {set i 0} {$i < $val(nn) } {incr i} {
set node_($i) [$ns_ node]
$node_($i) random-motion 0 ;# disable random
motion
}
#
# Provide initial (X,Y, for now Z=0) co-ordinates for mobilenodes
#
$node_(0) set X_ 5.0
$node_(0) set Y_ 499.0
$node_(0) set Z_ 0.0
$node_(1) set X_ 499.0
$node_(1) set Y_ 499.0
$node_(1) set Z_ 0.0
$node_(2) set X_ 200.0
$node_(2) set Y_ 1.0
$node_(2) set Z_ 0.0
$node_(3) set X_ 10.0
$node_(3) set Y_ 1.0
$node_(3) set Z_ 0.0
$node_(4) set X_ 10.0
$node_(4) set Y_ 50.0
$node_(4) set Z_ 0.0
#
# Now produce some simple node movements
# Node_(1) starts to move towards node_(0)
#
$ns_ at 1.0 "$node_(0) setdest 50.0 499.0 30.0"
$ns_ at 3.0 "$node_(1) setdest 200.0 499.0 100.0"
$ns_ at 0.5 "$node_(2) setdest 100.0 499.0 50.0"
$ns_ at 0.5 "$node_(3) setdest 100.0 1.0 50.0"
$ns_ at 0.5 "$node_(4) setdest 250.0 499.0 50.0"
# Setup traffic flow between nodes
set tcp1 [new Agent/TCP]
set tcp2 [new Agent/TCP]
set tcp3 [new Agent/TCP]
set tcp4 [new Agent/TCP]
set sink1 [new Agent/TCPSink]
set sink2 [new Agent/TCPSink]
set sink3 [new Agent/TCPSink]
set sink4 [new Agent/TCPSink]
$ns_ attach-agent $node_(0) $tcp1
$ns_ attach-agent $node_(0) $tcp2
$ns_ attach-agent $node_(0) $tcp3
$ns_ attach-agent $node_(3) $tcp4
$ns_ attach-agent $node_(1) $sink1
$ns_ attach-agent $node_(2) $sink2
$ns_ attach-agent $node_(3) $sink3
$ns_ attach-agent $node_(4) $sink4
$ns_ connect $tcp1 $sink1
$ns_ connect $tcp2 $sink2
$ns_ connect $tcp3 $sink3
$ns_ connect $tcp4 $sink4
set ftp1 [new Application/FTP]
set ftp2 [new Application/FTP]
set ftp3 [new Application/FTP]
set ftp4 [new Application/FTP]
$ftp1 attach-agent $tcp1
$ftp2 attach-agent $tcp2
$ftp3 attach-agent $tcp3
$ftp4 attach-agent $tcp4
$ns_ at 1.0 "$ns_ trace-annotate \"trial!!\""
$ns_ at 1 "$ftp1 start"
$ns_ at 2 "$ftp2 start"
$ns_ at 3 "$ftp3 start"
$ns_ at 4 "$ftp4 start"
# Define node initial position in nam
for {set i 0} {$i < $val(nn)} {incr i} {
# 30 defines the node size in nam, must adjust it according to your
scenario
# The function must be called after mobility model is defined
$ns_ initial_node_pos $node_($i) 30
}
#
# Tell nodes when the simulation ends
#
for {set i 0} {$i < $val(nn) } {incr i} {
$ns_ at 20.0 "$node_($i) reset";
}
$ns_ at 20.0 "stop"
$ns_ at 20.01 "puts \"NS EXITING...\" ; $ns_ halt"
proc stop {} {
global ns_ tracefd
$ns_ flush-trace
close $tracefd
exec nam simple-wireless-out &
exit 0
}
puts "Starting Simulation..."
$ns_ run