Hi,
NS doesn't model at 100% the real world. For example you some of the
802.11 frames (i.e management and some control frames) aren't even
implemented under NS (but I know that some work is being done to provide
a more accurate 802.11 implementation). This is the case too for the
phys layer and the propagation. Just keep in mind that you won't get a
100% representation of the real world.
Now concerning the RX,Rb,Pt and CP parameters, I really didn't have the
chance to play with them so that I can't provide a full answer (some
people may, just keep asking) to your question. However, the best
reference to answer your question is the source code of the involved
components, namely Phy/WirelessPhy, Propagation/TwoRayGround and
Antenna/OmniAntenna.
Regards,
Ilyes Gouta.
hamid reza wrote:
> Dear Mr.Gouta,
> I dont want to Emulate WLAN card with NS2,
> I only Want to Match Between WLAN Specifications
> and NS2 Parameters To show if we use NS2 as our
> Simulator, NS2 show my these proposed results?
> May be in real world we cant see this Result.
> As you Told me
>> You have to make sure which model your real
> WLAN card uses and check if it really complies with
> the model implemented in NS (it will hardly match).
> <
> But I Suppose that WLAN Support NS2 Model.
> In my mind i think
> Phy/WirelessPhy set CSThresh_
> Equal with Reciever Sensivity
>
> But How Can i Catch RX,Rb,Pt,CP?
>
>
> Best Regards
> Hamid.R Afrancheh
>
>
>
>
> --- Ilyes Gouta <[EMAIL PROTECTED]> wrote:
>
>> Hi,
>>
>> Emulating a real card on NS is pretty hard actually
>> since in
>> real-life, the WLAN card would change dynamically
>> it's transmission
>> power and RX/CS Thresholds during an association
>> with an access point.
>> Let's assume that you got the different parameters
>> then you could use
>> them within NS by altering values in a TCL script
>> like:
>>
>> Phy/WirelessPhy set CPThresh_
>> Phy/WirelessPhy set CSThresh_
>> Phy/WirelessPhy set RXThresh_
>> Phy/WirelessPhy set Rb_
>> Phy/WirelessPhy set Pt_
>> Phy/WirelessPhy set freq_
>>
>> These parameters are implementation-dependent
>> (Phy/Wireless in our
>> case). You have to make sure which model your real
>> WLAN card uses and
>> check if it really complies with the model
>> implemented in NS (it will
>> hardly match).
>>
>> To get those values from a real card you should
>> check first if its
>> driver exports them. Try looking inside /proc or use
>> the
>> iw{list|config|priv|...} commands to see if you can
>> get that
>> information. It depends heavily on the hardware and
>> the driver.
>>
>> Regards,
>> Ilyes Gouta.
>>
>> On 4/29/06, hamid reza <[EMAIL PROTECTED]> wrote:
>>> Thanks For your response,
>>> and sorry if i send this email to you personally.
>>> I asked this question on NS Users Room and it
>> seems
>>> You have a good information about it.
>>> My Question :
>>> We have a tech spec for special WLAN Card.
>>> How can I convert its specifications to NS2
>>> Parameters?
>>> Example How can I retrieve CSThresh_ and Pt_ and
>> ...
>>> From a spec tech on special WLAN Card.
>>>
>>> Best Regards
>>> Hamid Reza
>>>
>>>
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