On Mon, 20 Oct 2003 Sam Leffler wrote:
> > On Monday 20 October 2003 03:37 am, Anthony Wright wrote:
> > hardware. Also the ability to be able to do per packet transmission
> > power, so if you're talking to two people, one close and one far
> > away you could be sociable and lower the transmission power when
> > talking to the one who's close.
> Per-packet TPC is possible on the 5212 and later parts but isn't yet
> available (even for Atheros drivers). It will happen together with
> support for hardware multi-rate retranismission (another 5212-specific
> feature). Right now the main focus is getting support in for a new
> part that has already hit the retail channels and which,
> unfortunately, the existing HAL code doesn't handle properly (instead
> of rejecting the part as unsupported it attaches and then jumps
> through a null function pointer--oops).
First of all, thanks to all the developers for the great work. A lot of
us really appreciate it.
I have a question about per-packet transmission power control. A lot of
research is going into new transmission power control schemes, but nearly
all of these have gone untested in the real world. The hardware has not
supported it until now, and it has been difficult to find out if
limitations are in hardware or in the drivers.
If 5212 supports this, a lot of people in the research community will be
happy to hear about it. I plan to make an easy interface for researchers
to test their TPC schemes, so they can validate the results of their
simulations in the real world. Can I just change the txpower parameter of
the ath_hal_setuptxdesc() call for each packet that is sent? If so, how
do I find what values are acceptible?
Thank you much,
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