[Ns-developers] transmission range in wifi network

[Mathieu Lacage]

On Mon, 2009-04-06 at 19:34 +0200, ichrak amdouni wrote:
> Hi all,
> 
> I need to fix the transmission range for access points and mobile stations
> in an infrastructure wifi network.
> I mean, how to manage to let communication restricted to a given distance?
> I know that in the ns3.3 version, this parameter is not explicitly set, but
> affected by others like the TxPower and the channel loss model, but
> actually, I experimented multiple matching between those parameters but I
> have always stange results (a sta can affiliate with an APdistant of
> thousands of meters!!).

I doubt that is the case with the default values of all parameters.
Maybe you changed some parameters ?

> Having distinct results from those of the wifi-phy-test.cc example, I wonder
> if this issue has a relation with other layers other than the Physical one?

No, it's all a PHY layer thing.

> I find the hypothesis very stange but I really reproduced the same scenario
> as in wifi-phy-test.cc.

What kind of scenario ? Could you be more explicit about what you, what
you get, and what you expect from wifi-phy-test ?

> May I missing something?
> 
>   - Did someone experiment this issue especially in high mobiliy network? or
> have an idea to deal with it differently?
>   - Is the transmission range explicitly set in ns 3.4? If  yes, which files
> were modified?

No, ns-3.4 has no support for this. A patch to add a range-based PHY
model would be welcome.

Mathieu