[Ns-developers] spectrum modeling and wifi device

[Mathieu Lacage]

On Tue, 2009-02-24 at 19:33 +0100, Ruben Merz wrote:

> So, you want to do two things in the wireless PHY of ns3: (1) support
> for multiple transmission channels at the PHY and (2) interference
> modeling at the receiver.
> 
> I really would like to see multiple transmission channels implemented.
> 
> IMHO, for multiple transmission channels, this is an attribute that
> should be set in YansWifiPhy. When you call YansWifiChannel::Send(), the
> particular channel should be set for the packet. I don't know, however,
> if it should be an attribute of the Send() function or something that is
> set "on the packet", say with a tag.

I think that it should be an extra argument to YansWifiChannel::Send.

> For interference modeling at the receiver, I think you don't have to
> insert an object between YansWifiPhy and YansWifiChannel. What you may
> want, is to get all the packets (irrespective of their transmission
> channel) back to YansWifiPhy, and then process those packets in
> YansWifiPhy. Typically, you would do that at the same time than you
> compute the SNR.

Yes, this would be one way of doing this. You could also simply modelize
this as an extra loss for incoming packets which is calculated based on
the center frequency of the incoming packet and the center frequency of
the receiver.

regards,
Mathieu