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Old 11-22-2011, 04:39 AM   #1
Marz22
LQ Newbie
 
Registered: Nov 2011
Posts: 10

Rep: Reputation: Disabled
NS-2 TCL error while simulation


I am stucked in a problem. i-e after running the ns on a my mrmc.tcl script file, i get the following error:

linux-p84p:/usr/local/src/ns-2.34/MRMC-Protocol # ns mrmc.tcl
Wireless Mesh Network in Chain Topologies - 4 Nodes, 3 Channels,
2 Interfaces
num_nodes is set 12

(_o3 cmd line 1)
invoked from within
"_o3 cmd change-numifs 3"
invoked from within
"catch "$self cmd $args" ret"
invoked from within
"if [catch "$self cmd $args" ret] {
set cls [$self info class]
global errorInfo
set savedInfo $errorInfo
error "error when calling class $cls: $args" $..."
(procedure "_o3" line 2)
(SplitObject unknown line 2)
invoked from within
"$ns_ change-numifs $val(nc)"
(file "mrmc.tcl" line 74)


Any one have got the similar problem??
 
Old 11-22-2011, 04:41 AM   #2
Marz22
LQ Newbie
 
Registered: Nov 2011
Posts: 10

Original Poster
Rep: Reputation: Disabled
---------------------------------
mrmc.tcl
--------------------------------

# Description: Simulation script for multi-Channel multi-Interface Wireless Mesh Networks
# File: mrmc.tcl
#===============================================================================
#======================================
# MAC Layer Setup
#======================================
Mac/802_11 set dataRate_ 5.4e6 ;# rate for data frames in Mbps
#======================================
# Simulation Parameters Setup
#======================================
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(rp) AODV ;# routing protocol
set val(x) 1000 ;# X dimension of topography
set val(y) 1000 ;# Y dimension of topography
set val(stop) 70 ;# nam stop time
set val(nn) 4 ;# number of mobilenodes
set val(nc) 3 ;# number of channels
set val(ni) 2 ;# number of interfaces, <= number of channels
set pktsize 1000 ;# packet size in bytes
set pktrate 0.0014 ;# packet rate in seconds
set filename wireless_chain_n$val(nn)_c$val(nc)_i$val(ni)
puts "Wireless Mesh Network in Chain Topologies - $val(nn) Nodes, $val(nc) Channels,
$val(ni) Interfaces"
#======================================
# Initialization
#======================================
# Create a ns simulator
set ns_ [new Simulator]
# Setup topography object
set topo [new Topography]
$topo load_flatgrid $val(x) $val(y)
set god_ [create-god [expr $val(nn)*$val(nc)]]
# Open the NS trace file
set tracefd [open $filename.tr w]
$ns_ trace-all $tracefd
$ns_ use-newtrace
# Open the NAM trace file
set namfile [open $filename.nam w]
$ns_ namtrace-all $namfile
$ns_ namtrace-all-wireless $namfile $val(x) $val(y)
# Create wireless channels
for {set i 0} {$i < $val(nc)} {incr i} {
set chan($i) [new $val(chan)]
}
#======================================
# Mobile Node Parameter Setup
#======================================
$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(0) \
-topoInstance $topo \
-agentTrace ON \
-routerTrace ON \
-macTrace OFF \
-movementTrace OFF \
-ifNum $val(ni)
#======================================
# Nodes Definition
#======================================
$ns_ change-numifs $val(nc)
for {set i 0} {$i < $val(nc)} {incr i} {
$ns_ add-channel $i $chan($i)
}
# Create nodes
for {set i 0} {$i < $val(nn)} {incr i} {
set n($i) [$ns_ node]
$god_ new_node $n($i)
}
# Set node positions in horizontal chain topology
set nodedist 250
for {set i 0} {$i < $val(nn)} {incr i} {
$n($i) set X_ [expr $i * $nodedist + 20]
$n($i) set Y_ 50
$n($i) set Z_ 0.0
$ns_ initial_node_pos $n($i) 40
$n($i) random-motion 0
}
#======================================
# Agents Definition
#======================================
set udp0 [new Agent/UDP]
$ns_ attach-agent $n(0) $udp0
set sink0 [new Agent/Null]
set last_node_id [expr $val(nn)-1]
$ns_ attach-agent $n($last_node_id) $sink0
$ns_ connect $udp0 $sink0
#======================================
# Applications Definition
#======================================
# Setup a CBR Application over UDP connection
set cbr0 [new Application/Traffic/CBR]
$cbr0 attach-agent $udp0
$cbr0 set packetSize_ $pktsize
$cbr0 set interval_ $pktrate
$ns_ at 1.0 "$cbr0 start"
$ns_ at 61.0 "$cbr0 stop"
#======================================
# Simulation Termination
#======================================
# Define a finish procedure
proc finish {} {
global ns_ tracefd filename pktsize last_node_id
global namfile
$ns_ flush-trace
close $tracefd
close $namfile
exec nam $filename.nam &
# Call throughput analyzer exec awk -f avgStats.awk src=0 dst=$last_node_id flow=0 pkt=$pktsize $filename.tr &
exit 0
}
for {set i 0} {$i < $val(nn) } { incr i } {
$ns_ at $val(stop) "\$n($i) reset"
}
$ns_ at $val(stop) "$ns_ nam-end-wireless $val(stop)"
$ns_ at $val(stop) "finish"
$ns_ at $val(stop) "puts \"done\" ; $ns_ halt"
$ns_ run

--------------

---------- Post added 11-22-11 at 04:41 AM ----------

some changes to ns-2.34/tcl/ns-lib.tcl

Added the below four procedure as per the document given in first post.

# MRMC: Procedure to change the number of interfaces
Simulator instproc change-numifs {newnumifs} {
$self instvar numifs_
set numifs_ $newnumifs
}
# MRMC: Procedure to add an interface on a node
Simulator instproc add-channel {indexch ch} {
$self instvar chan
set chan($indexch) $ch
}
# MRMC: Procedure to get the number of interfaces
Simulator instproc get-numifs { } {
$self instvar numifs_
if [info exists numifs_] {
return $numifs_
} else {
return ""
}
}
# Procedure to add multiple interfaces as an argument to node-config label
Simulator instproc ifNum {val} {
$self set numifs_ $val
}

I have defined the above procedures before creating node in ns-lib.tcl.

please help.
 
Old 11-22-2011, 04:49 AM   #3
Marz22
LQ Newbie
 
Registered: Nov 2011
Posts: 10

Original Poster
Rep: Reputation: Disabled
Further, note these changes to /tcl/lib/ns-lib.tcl: in procedure.. Simulator instproc create-wireless-node args {

------------------


XXX This should be moved into the node initialization procedure instead
# of standing here in ns-lib.tcl.
Simulator instproc create-wireless-node args {
$self instvar routingAgent_ wiredRouting_ propInstance_ llType_ \
macType_ ifqType_ ifqlen_ phyType_ chan antType_ \
energyModel_ initialEnergy_ txPower_ rxPower_ \
idlePower_ sleepPower_ sleepTime_ transitionPower_ transitionTime_ \
topoInstance_ level1_ level2_ inerrProc_ outerrProc_ FECProc_ \
numifs_

.............

............

#################################################################
## Second Change Starts here
#################################################################

# MRMC: Add main node interface
if {[info exists numifs_]} {
for {set i 0} {$i < $numifs_} {incr i} {
# Add one interface per channel
#puts "chan $i: $chan($i)"
$node add-interface $chan($i) $propInstance_ $llType_ $macType_ \
$ifqType_ $ifqlen_ $phyType_ $antType_ $topoInstance_ \
$inerrProc_ $outerrProc_ $FECProc_
}
} else {
$node add-interface $chan $propInstance_ $llType_ $macType_ \
$ifqType_ $ifqlen_ $phyType_ $antType_ $topoInstance_ \
$inerrProc_ $outerrProc_ $FECProc_

###################################################################
## Second Change Ends here
###################################################################

........
........
 
  


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