[ns] 802.11a channels in ns2

[Zubiya ..]

Hello!

i want to ask about the Ns2 support for 802.11a channels. How we can switch
to different channels in 802.11a?
Also 802.11a support different data rates and there are 7 different data
transmission modes ranging from 6Mbps
to 54Mbps. How to select different data modes of 802.11a in ns2?
Kindly help me
Thanks in advance.

Regards.

Re: [ns] RE : regarding wireless network

[Zubiya ..]

hi,
you need to declare val(x). as val(x) has been used without declaring it.

Regards

On Sun, Sep 18, 2011 at 6:52 PM, Dineshkumar Dinesh wrote:

>
>
> hello,
> while executing the simple-wireless.tcl file i got the following error i
> dont know how to remove that error,,if u know kindly help
> me.
> dineshkumar@ubuntu:~/ns2 exercises$ ns w1.tcl
> can't read "val(x)": no such variable
>while executing
> "$ns namtrace-all-wireless $namtrace $val(x) $val(y)"
>(file "w1.tcl" line 11)
> dineshkumar@ubuntu:~/ns2 exercises$ cd -
> /home/dineshkumar
> dineshkumar@ubuntu:~$ ns simple-wireless.tcl
> num_nodes is set 2
> warning: Please use -channel as shown in tcl/ex/wireless-mitf.tcl
> INITIALIZE THE LIST xListHead
> Starting Simulation...
> channel.cc:sendUp - Calc highestAntennaZ_ and distCST_
> highestAntennaZ_ = 1.5,  distCST_ = 550.0
> SORTING LISTS ...DONE!
> NS EXITING...
>
>
>

[ns] CBR rate and data rate

[Zubiya ..]

Hi!
I want to know that for different data rate how to select cbr trate?
for different data rates of 802.11a and 802.11b what should be cbr value

Thanks in advance

-- 
Regards

[ns] Fwd: CBR rate and data rate

[Zubiya ..]

-- Forwarded message --
From: Zubiya .. 
Date: Wed, Dec 28, 2011 at 9:12 PM
Subject: CBR rate and data rate
To: ns-users@isi.edu


Hi!
I want to know that for different data rates how to select cbr rate?
for different data rates of 802.11a and 802.11b what should be the value
for cbr rate

Thanks in advance

-- 
Regards





-- 
Regards


LA ILAHA ILLALLAHU MUHAMMADUR RASOOLULLAH

[ns] need help regarding Mac/802.11Ext

[Zubiya ..]

Hi,
I need guidance for using Mac/802.11Ext.

1) How to set different data rates while using Mac/802.11Ext?

2) What does the following parameter mean?
  * Phy/WirelessPhyExt set noise_floor_ 2.512e-13
;#-96 dBm for 10MHz bandwidth*

does it change with different modulation schemes?

Thanks in advance


-- 
Regards

[ns] Help for simulating 802.11a data rates

[Zubiya ..]

Hi,
Can anyone help me about simulating data rates of 802.11a with their
respective modulation schemes (BPSK, QPSK, QAM)
There are patches available e.g. 802.11Ext and dei80211mr but the
information about them is not enough.
802.11Ext provides limited coding schemes and it has skipped BPSK3/4,
QPSK3/4, 16QAM3/4.
dei80211mr documentation is not available.

Thanks in advance



-- 
Regards

[ns] using threshold.cc

[Zubiya ..]

Hi,

Kindly tell me how to use threshold.cc. After execution how to get the
threshold values?
I am using Cisco Aironet 802.11a/b/g card specifications to get
RXThreshold, Transmit power etc for 802.11a simulation. How i can get
CSThreshold?

2ndly when i use RXThreshold and transmit power according to card
specifications,  packets are being dropped. What values should i use for
802.11a different data rates.

Thanks in advance
-- 
Regards

[ns] wireless LAN infrastructure mode

[Zubiya ..]

Hi,
How to simulate wireless LAN infrastructure mode with AP in NS2?
Thanks in advance

-- 
Regards

[ns] getting values from trace file during execution of tcl script

[Zubiya ..]

Hi,
during execution of tcl script, is there some way to get values from trace
file (e.g number of sent packets) after a specific time interval (e.g.3ms)?
I need to write a function to count number of sent/received packets or
bytes after every 2ms.

I hope many researchers are present at this platform so plz consider it and
do reply me.

Thanks in advance

-- 
Regards

[ns] Dynamically change data rate

[Zubiya ..]

Hi,
In Tcl if we want to change the CBR value and data rate dynamically then
how it can be achieved?
i have tried following code but it takes only initialisation value that is
1000

set cbr_rate 1000
proc record {} {

global  cb_rate cbr

set ns [Simulator instance]

set $cb_rate [expr $cb_rate + 5]
set time 0.5
set now [$ns now]
$cbr set rate_ $cb_rate
puts "$cb_rate"
$ns at [expr $now+$time] "record"

}

Thanks in advance
-- 
Regards