[Ns-developers] Traced callbacks in WifiPhy

[Mathieu Lacage]

On Fri, 2009-01-09 at 13:24 +0100, Timo Bingmann wrote:

> I now like the WifiPhyTag idea much better. But still Tags cannot be
> updated easily? I mean like updating a field rxPowerDbm.

No, they can't be updated: once set, you can't change the content unless
you first remove the tag and then add it back. Doing so will be fairly
inefficient (the second add will create a copy of all the tags of the
packet in a new memory buffer) but it will work.

> > If you both with a patch to do so, yes. It would also be nice to extend
> > the state machine with a real SYNChronizing state, even if it is not
> > used in the current codebase.
> 
> That's what I'm currently working at, thus the confusion. However
> currently I believe I can manage the changes without the extra
> PreSYNC/PreRX state, which is preferred because it also requires one
> Schedule() less.

I merely suggested to change the WifiPhyStateHelper class to keep track
of an extra state and a couple of extra state transitions, not to use
this new state and transitions from YansWifiPhy:

IDLE -> SYNC, SYNC -> RX and IDLE -> RX

So, the current code would still perform IDLE->RX but if we improve the
model later, we can perform IDLE->SYNC->RX

not a big deal.

regards,
Mathieu