[ns] who can help me with Congestion Simulation in NS2?
hello, I am interested in networks congestion control, so I need the simulation script or code in NS2, especially TCP Peach, Vegas, Reno, NewReno, RED and so on.If I have these simulation, I can go ahead. Can someone help me? Thanks a lot! please Email me! Yours -- Sun
[ns] which of 802.11a/b/G is implemented in ns2 ?
Hi all, Reading the ns doc, I found out that IEEE 802.11 is implemented. First, I don't which of the three standards a,b and g is implemented? Second, can anyone send a sample tcl file or lines showing how I can connect 802.11Gnodes? Can anyone help please ? thank you in advance, -- best regards, Imad Abdeljaouad
Re: [ns] which of 802.11a/b/G is implemented in ns2 ?
Imad, MAC layer is the same for these flavours of IEEE 802.11 (channel access, backoff, deferring); you can change stations' datarate (1, 2, 11 Mbps, etc) but PHY layer (modulation, code) is almost not implemented in ns2. Fabio Imad Abdeljaouad wrote: Hi all, Reading the ns doc, I found out that IEEE 802.11 is implemented. First, I don't which of the three standards a,b and g is implemented? Second, can anyone send a sample tcl file or lines showing how I can connect 802.11Gnodes? Can anyone help please ? thank you in advance,
Re: [ns] Segmentation fault with wireless simulation
change the ifq to CMUPriQueue.
On Jan 7, 2008 7:06 PM, jayachandra gullapalli [EMAIL PROTECTED]
wrote:
Hi,
I was trying an wireless simulation on NS, I encounter this segmentation
fault. I tried to troubleshoot the code but with no success. Could you
please correct if I have some problem with the code.
The code with which I tried the simulation.
#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) Queue/DropTail/PriQueue;
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
Your help in this regard would be greatly appreciated.
Thanks,
Jayachandra.
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[ns] Need of Backup source routing code
Hi, I am doing a project related to Backup Routing in DSR protocol for that i am in need of backup source routing (BSR) protocol which was already implemented. Where can i get this BSR. Please help me - This email was sent using TCEMail Service. Thiagarajar College of Engineering Madurai - 625015 (India)
Re: [ns] Segmentation fault with wireless simulation
Hi, Try to change queue type. Segmentation fault will remove. thanks. KHALIL MS COMSATS - Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
