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Re: [ns] need help on wireless simulation
I want to observe the queue scheduling inside the router node,here is the
complete picture:
FTP0
|
tcp0
|
n1
\ sink0
\ /
n2 - - - - - - - - - - -n3
/ \
/ sink1
n0
|
tcp1
|
ftp1
I want the packets to go through node 2 before they are sent by node 2 to
node 3, that means it will be one-hope away right? I set tcp agent and ftp
application in node 0 and node 1, as well as attached 2 tcpsink to
node 3.Imade node 3 out of the sensing range of the source nodes so
that i can make
sure that the packets from source node did not go directly to node 3.However,
after the simulation, they are not only didnt go directly to node 3 but also
not sent to node 2. Thats why I am wondering what is wrong with my
simulation.Do you know the situation?
Thanks for your help.
On 2/26/07, Matthias Kuhnert <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> do you have any traffic between source and sink at all?
> If so, then they simply have a direct connection and communicate without
> the other node. So then either put the nodes further away from each other,
> or decrease the rx/tx range...
> If not, you have a completely different problem and perhaps the nodes too
> far apart from each other...
>
>
> Greets,
> Matthias
>
> Original-Nachricht ----
> Datum: Mon, 26 Feb 2007 21:51:04 +0800
> Von: "romzyi prasetyo" <[EMAIL PROTECTED]>
> An: "ns milis"
> CC:
> Betreff: [ns] need help on wireless simulation
>
> >
> > hi all,
> >
> > I am new in NS2. Currently I am doing wireless simulation which consists
> > of
> > 4 nodes. 2 as the source nodes, 1 as a router, the other one as a sink
> > node.
> > I want to simulate such that when the source nodes generate packets, the
> > packets will be queued in relay node before they are sent to the sink
> > node.However,the problem is there is no packet received in node 2 .I
> > wonder
> > what has caused this error.I have made sure that the relay node is
> located
> > pretty near to the source nodes, but still no packets received there.
> > Below is the code:
> > #
> ===
> > # PRIORITY-BASED DROPTAIL QUEUE SIMULATION#
> > #
> ===
> > # Scheme:
> > #
> ---
> >
> > #n1(100,200,0)
> > # \
> > # n2(150,150,0) --- n3(500,150,0)
> > # /
> > #n0(100,100,0)
> > #
> > # ==
>
> > # 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(ifqlen) 10;# max packet in ifq
> > set val(nn) 4 ;# number of
> > mobilenodes
> > set val(rp) DSDV ;# routing protocol
> > set val(drate)2.0e6 ;# default
> datarate
> >
> > # ==
> > # Main Program
> > # ==
> >
> >
> > proc getopt {argc argv} {
> > global val
> > lappend optlist drate
> >
> > for {set i 0} {$i < $argc} {incr i} {
> > set arg [lindex $argv $i]
> > if {[string range $arg 0 0] != "-"} continue
> >
> > set name [string range $arg 1 end]
> > set val($name) [lindex $argv [expr $i+1]]
> > }
> >
> > }
> >
> > getopt $argc $argv
> >
> > # Initialize Global Variables
> > set ns_[new Simulator]
> > set tracefd [open fyp6.tr w]
> > #set tracefd0 [open fyp4_0.tr w]
> > #set tracefd1 [open fyp4_1.tr w]
> > #set cmt [cmu-trace S
[ns] need help on wireless simulation
hi all,
I am new in NS2. Currently I am doing wireless simulation which consists of
4 nodes. 2 as the source nodes, 1 as a router, the other one as a sink node.
I want to simulate such that when the source nodes generate packets, the
packets will be queued in relay node before they are sent to the sink
node.However,the problem is there is no packet received in node 2 .I wonder
what has caused this error.I have made sure that the relay node is located
pretty near to the source nodes, but still no packets received there.
Below is the code:
# ===
# PRIORITY-BASED DROPTAIL QUEUE SIMULATION#
# ===
# Scheme:
# ---
#n1(100,200,0)
# \
# n2(150,150,0) --- n3(500,150,0)
# /
#n0(100,100,0)
#
# ==
# Define options
# ==
set val(chan) Channel/WirelessChannel;# channel type
set val(prop) Propagation/TwoRayGround ;# radio-propagation
model
set val(netif) Phy/WirelessPhy;# network interface type
set val(mac)Mac/802_11 ;# MAC type
set val(ifq)Queue/DropTail/PriQueue;# interface queue type
set val(ll) LL ;# link layer type
set val(ant)Antenna/OmniAntenna;# antenna model
set val(ifqlen) 10;# max packet in ifq
set val(nn) 4 ;# number of mobilenodes
set val(rp) DSDV ;# routing protocol
set val(drate)2.0e6 ;# default datarate
# ==
# Main Program
# ==
proc getopt {argc argv} {
global val
lappend optlist drate
for {set i 0} {$i < $argc} {incr i} {
set arg [lindex $argv $i]
if {[string range $arg 0 0] != "-"} continue
set name [string range $arg 1 end]
set val($name) [lindex $argv [expr $i+1]]
}
}
getopt $argc $argv
# Initialize Global Variables
set ns_[new Simulator]
set tracefd [open fyp6.tr w]
#set tracefd0 [open fyp4_0.tr w]
#set tracefd1 [open fyp4_1.tr w]
#set cmt [cmu-trace Send "RTR" $tracefd]
$ns_ use-newtrace
$ns_ trace-all $tracefd
# set up topography object
set topo [new Topography]
$topo load_flatgrid 500 500
# Create God
create-god $val(nn)
set data0 0
set data1 0
# Parameter values
$val(mac) set dataRate_ $val(drate)
#$val(mac) set bandwidth_ 22.0e6
#$val(netif) set Pt_ 0.28
$val(netif) set bandwidth_ 2.0e6
# Create the specified number of mobilenodes [$val(nn)] and "attach" them
# to the channel
# Here 4 nodes are created : node(0),node(1), node(2) and node(3)
# 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
}
# Provide co-ordinates for mobilenodes
$node_(0) set X_ 100.0
$node_(0) set Y_ 100.0
$node_(0) set Z_ 0.0
$node_(1) set X_ 100.0
$node_(1) set Y_ 200.0
$node_(1) set Z_ 0.0
$node_(2) set X_ 150.0
$node_(2) set Y_ 150.0
$node_(2) set Z_ 0.0
$node_(3) set X_ 500.0
$node_(3) set Y_ 150.0
$node_(3) set Z_ 0.0
# Setup traffic flow between nodes
set tcp(0) [new Agent/TCP]
$tcp(0) set class_ 1
set sink(0) [new Agent/TCPSink]
$ns_ attach-agent $node_(0) $tcp(0)
$ns_ attach-agent $node_(3) $sink(0)
$ns_ connect $tcp(0) $sink(0)
set FTP(0) [new Application/FTP]
$FTP(0) attach-agent $tcp(0)
$ns_ at 3.0 "$FTP(0) start"
set tcp(1) [new Agent/TCP]
$tcp(1) set class_ 2
$tcp(1) set fid_ 1
set sink(1) [new Agent/TCPSink]
$ns_ attach-agent $node_(1) $tcp(1)
$ns_ attach-agent $node_(3) $sink(1)
$ns_ connect $tcp(1) $sink(1)
set FTP(1) [new Application/FTP]
$FTP(1) attach-agent $tcp(1)
$ns_ at 1.0 "$FTP(1) start"
$ns_ at 100.0 "$node_(0) reset"
$ns_ at 100.0 "$node_(1) reset"
$ns_ at 100.0 "stop"
$ns_ at 100.01 "puts \"NS EXITING...\" ; $ns_ halt"
proc stop {} {
global ns_ tracefd
# Get data from trace file, put current-time and calculated-throughput
in a new file (Kbps)
set awkCode {
{
if ($1=="r" && $5=="3" && $39=="0" && $45=="tcp" )
{
data0=data0 + $37
print $3, data0*8.0/$3/1000 >> "temp.q0";
}
else if
[ns] Priority Packet Simulation Debug
Dear All I am newbie in NS2. Currently I am doing priority packet simulation. I simulated 4 nodes n0,n1,n1,n4. The situation like this: n0 (tcp agent) \ \ n2---n3(sink) / (router) / n1 (tcp agent) I assigned priority 0 to node n0 and priority 1 to node n1. Then using simple priority queue algorithm used to dequeue packets sent by node n0 and n1 to node n3.However, after the simulation completed,when I looked at the trace file, the node n1 is not generating any packet. Therefore I can not compare the throughput from node n0 and node n1 because node n1 is not generating any packets. I've spent three nights to debug this error but I couldnt figure it out yet. Is there anyone that understand the problem and have experiences in this kind of error? I'll appreciate your help very much. Regards Romzyi NTU Singapore Undergrad
