in your script you have to change ifq value Queue/DropTail/PriQueue by CMUPriQueue #Define wirleess scenario parameters set val(chan) Channel/WirelessChannel; set val(prop) Propagation/TwoRayGround1; set val(netif) Phy/WirelessPhy; set val(mac) Mac/802_11; set val(ifq) CMUPriQueue ; set val(ll) LL; set val(ant) Antenna/OmniAntenna; set val(ifqlen) 50; set val(nn) 5; set val(rp) DSR; set val(x) 500; set val(y) 400; set val(stop) 150; set ns [new Simulator] set tracefd [open problem1Trace.tr w] set windowVsTime2 [open problem1Win.tr w] set namfd [open problem1Namtrace.nam w] $ns trace-all $tracefd $ns namtrace-all-wireless $namfd $val(x) $val(y) set topo [new Topography] $topo load_flatgrid $val(x) $val(y) create-god $val(nn) $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 $topo \ -agentTrace ON \ -routerTrace ON\ -macTrace OFF \ -movementTrace ON for {set i 0} {$i < $val(nn) } {incr i} { set node_($i) [$ns node] } $node_(0) set X_ 5.0 $node_(0) set Y_ 5.0 $node_(0) set Z_ 0.0 $node_(1) set X_ 490.0 $node_(1) set Y_ 285.0 $node_(1) set Z_ 0.0 $node_(2) set X_ 150.0 $node_(2) set Y_ 240.0 $node_(2) set Z_ 0.0 $node_(3) set X_ 495.0 $node_(3) set Y_ 100 $node_(3) set Z_ 0.0 $node_(4) set X_ 495 $node_(4) set Y_ 395 $node_(4) set Z_ 0.0 $ns at 10.0 "$node_(0) setdest 250.0 250.0 3.0" $ns at 15.0 "$node_(1) setdest 45.0 285.0 5.0" $ns at 20.0 "$node_(2) setdest 480.0 300.0 5.0" $ns at 25.0 "$node_(3) setdest 50.0 150.0 5.0" $ns at 15.0 "$node_(4) setdest 50.0 50.0 3.0" #set TCP Connection between node_(0) and node_(1) set tcp0 [new Agent/TCP/Newreno] $tcp0 set class_ 2 set sink0 [new Agent/TCPSink] $ns attach-agent $node_(0) $tcp0 $ns attach-agent $node_(1) $sink0 $ns connect $tcp0 $sink0 set ftp [new Application/FTP] $ftp attach-agent $tcp0 $ns at 10.0 "$ftp start" #set TCP Connection between node_(0) and node_(4) set tcp1 [new Agent/TCP/Newreno] $tcp1 set class_ 2 set sink1 [new Agent/TCPSink] $ns attach-agent $node_(0) $tcp1 $ns attach-agent $node_(4) $sink1 $ns connect $tcp1 $sink1 set ftp1 [new Application/FTP] $ftp1 attach-agent $tcp1 $ns at 12.0 "$ftp1 start" #set TCP Connection between node_(3) and node_(2) set tcp2 [new Agent/TCP/Newreno] $tcp2 set class_ 2 set sink2 [new Agent/TCPSink] $ns attach-agent $node_(3) $tcp2 $ns attach-agent $node_(2) $sink2 $ns connect $tcp2 $sink2 set ftp2 [new Application/FTP] $ftp2 attach-agent $tcp2 $ns at 15.0 "$ftp2 start" proc plotWindow {tcpSource file} { global ns set time 0.01 set now [$ns now] set cwnd [$tcpSource set cwnd_] puts $file "$now $cwnd" $ns at [expr $now+$time] "plotWindow $tcpSource $file" } $ns at 10.1 "plotWindow $tcp0 $windowVsTime2" #define node position in NAM for {set i 0} {$i < $val(nn)} {incr i} { $ns initial_node_pos $node_($i) 30 } for {set i 0} {$i < $val(nn) } {incr i} { $ns at $val(stop) "$node_($i) reset"; } $ns at $val(stop) "$ns nam-end-wireless $val(stop)" $ns at $val(stop) "stop" $ns at 150.01 "puts \"end simulation\" ; $ns halt" proc stop {} { global ns tracefd namfd $ns flush-trace close $tracefd close $namfd } $ns run #Good Luck
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