On Monday 05 February 2007 19:08, Jiri Benc wrote:

On Mon, 5 Feb 2007 18:43:06 +0100, Michael Buesch wrote:

quoted

I also think that sending RTS in software is not going to work,
as the timing can not be guaranteed. And timing is why we do it in
the first place. If the HW is not capable of sending RTS frames, we
should not try to emulate them in SW, as it might make the situation
even worse by messing up the NAVs by wrong timing.

That's not emulation in the software, it's just similar approach as
with sending fragmented frames - you need (more or less) precise timing
there as well and many cards still want them enqueued one-by-one. The
firmware takes care of the precise timing. The same could apply to RTS
frames (i. e. the firmware recognize them and doesn't send them before
it has the next frame ready).

And even for a "dumb" device like rt2x00 (no firmware for rt2400pci, rt2500pci or rt2500usb)
it still has rts capabilities. It is just not capable of creating the frame, but
the descriptor has a special field that should be set in case of a rts frame.
So that would suggest that the device will treat the frame a little bit
different than a regular frame.

Ivo