I wanted to create a connection between 8 nodes and one AP, the transmission is in full duplex mode, for that i used this script:
set ns [new Simulator] # les dix noeuds: set node_0 [$ns node] # création des outputs trace et nam: set f [open glad.tr w] $ns trace-all $f set nf [open glad.nam w] $ns namtrace-all $nf # ====================================================================== # 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(rp) DumbAgent ;# routing protocol set val(start) 0.0 set val(ifqlen) 50 ;# max packet in ifq set val(nn) 9 set val(tr) "trace" set val(X) 500 set val(Y) 500 set val(CWmin) 16 set val(CWmax) 1024 set val(SlotTime) 0.000009 set val(SIFS) 0.000016 set val(basicRate) 2Mb set val(dataRate) 54Mb set val(PreambleLength) 104 set val(PLCPHeaderLength) 48 #------------------------------------------------------------------------ # Codec: G.711 #------------------------------------------------------------------------ #set val(ON) 1500ms #set val(OFF) 1500ms #set val(AppRate) 96Kb #set val(pktsize) 160 #160 octets #set val(pktinterval) 0.020 #set pktsize $val(pktsize) #160 octets #set pktinterval $val(pktinterval) #set val(run) 50.0 #------------------------------------------------------------------------ # MAC MIB #------------------------------------------------------------------------ Mac/802_11 set basicRate $val(basicRate)Mb Mac/802_11 set dataRate $val(dataRate)Mb Mac/802_11 set CWMin $val(CWmin) Mac/802_11 set CWMax $val(CWmax) Mac/802_11 set SlotTime $val(SlotTime) Mac/802_11 set SIFS $val(SIFS) Mac/802_11 set PreambleLength $val(PreambleLength);# no preamble Mac/802_11 set PLCPHeaderLength $val(PLCPHeaderLength) ;# 128 bits Mac/802_11 set PLCPDataRate 1.0e6 ;# 1Mbps # set up topography object set topo [new Topography] #$topo load_flatgrid $val(X) $val(Y) # Create God create-god $val(nn) # 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 $topo \ -agentTrace ON \ -routerTrace OFF \ -macTrace OFF \ -movementTrace OFF for {set i 0} {$i < $val(nn) } {incr i} { set node_($i) [$ns node] $node_($i) random-motion 0 ;# disable random motion } set rtp0 [new Agent/RTP] $ns attach-agent $node_0 $rtp0 set cbr0 [new Application/Traffic/CBR] $cbr0 attach-agent $rtp0 $ns at 0.5 "$cbr0 start" set null0 [new Agent/Null] $ns attach-agent $node_0 $null0 # multi flows for {set i 1} {$i < $val(nn) } {incr i 1} { set node_($i) [$ns node] $ns duplex-link $node_($i) $node_0 1Mb 20ms DropTail set rtp_($i) [new Agent/RTP] set null_($i) [new Agent/Null] $ns attach-agent $node_($i) $rtp_($i) $ns attach-agent $node_($i) $null_($i) #$rtp($node_($i) set class_($node_($i)) $ns connect $rtp_($i) $null0 $ns connect $rtp0 $null_($i) set cbr_($i) [new Application/Traffic/CBR] $cbr_($i) attach-agent $rtp_($i) puts [$cbr_($i) set packetSize_ 160] puts [$cbr_($i) set interval_ 20ms] $ns at 1.0 "cbr_($i) start" } $ns at 10.0 "finish" proc finish {} { global ns f nf $ns flush-trace close $f close $nf puts "running nam..." exec nam glad.nam & exit 0 } $ns run when this runnig this script, i have this error in setting "cbr_(1)" num_nodes is set 9 160 160 160 160 160 160 160 160 ns: cbr_(1) start: invalid command name "cbr_(1)" while executing "cbr_(1) start" please some help