[ns] RXThreshold issue in broadcast scenario

2013-08-17 Thread Osama Rehman 

Hello everyone,

Using the *TwoRayGround* reflection model and while keeping the
transmission power (Pt) fixed, (in my case 0.281838 W), i have the
following question:

When changing the receiver sensitivity by setting (RXThreshold), we can
control the transmission distance. I have built a *fifty nodes* *broadcast
scenario* in the form of two straight lines, each having a fixed *inter-nodes
distance*.

1) While setting the transmission distance to *301m* (i.e. Pt = 0.281838 W,
RXThreshold = 1.7382e-10) and *inter-nodes distance *to *300m*, broadcast
packets are received.

2) But, while setting the transmission distance to *51m* (i.e. Pt =
0.281838 W, RXThreshold = 7.39247e-08) and *inter-nodes distance *to *50m*,
broadcast packets are *NOT* received. To create a successful communication
in this scenario, i need to set-up a transmission distance of around *110m*,
through nodes exist at the distance of *50m*!

This issue keeps on repeating for all scenarios involving *small
transmission distances* and while nodes very much exists within the
transmission range.

I m very much clueless on this issue, any suggestions would be appreciated.

Regards,
Osama Rehman

[ns] rate control in transport layer

2013-08-17 Thread prince 

Hello admin 
in NS2  in which  .cc file , rate control at transport layer can be done
dynamically
pls tell
thanks  



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[ns] error in running hyacinth program

2013-08-17 Thread senthil kumar 

hi friends,

i am new to the ns2 environment... i have installed ubuntu 13,04 and ns2
2.35. I am doing project in wireless mesh networks..
i have tried hyacinth extensions. i have done the steps given in the
website..
while running the program , i am getting the below error..

please help me..

thank u

yours truly
senthil


num_nodes is set 25

(_o1015 cmd line 1)
invoked from within
_o1015 cmd addr
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 _o1015 line 2)
(SplitObject unknown line 2)
invoked from within
_o1015 addr
(eval body line 1)
invoked from within
eval $node addr $args
(default arm line 2)
invoked from within
switch -exact $routingAgent_ {
DSDV {
set ragent [$self create-dsdv-agent $node]
}
DSR {
$self at 0.0 $node start-dsr
}
AODV {
set ragent [$self cre...
(procedure _o3 line 14)
(Simulator create-wireless-node line 14)
invoked from within
_o3 create-wireless-node
(eval body line 1)
invoked from within
eval $self create-wireless-node $args
(procedure _o3 line 23)
(Simulator node line 23)
invoked from within
$ns_ node
invoked from within
set node_(0) [$ns_ node]
(file channel-route.tcl line 6)
invoked from within
source.orig channel-route.tcl
(uplevel body line 1)
invoked from within
uplevel source.orig [list $fileName]
invoked from within
if [$instance_ is_http_url $fileName] {
set buffer [$instance_ read_url $fileName]
uplevel eval $buffer
} else {
uplevel source.orig [list $fileName]
...
(procedure source line 8)
invoked from within
source channel-route.tcl
(file multich-tag.tcl line 124)