On 18 May 2012 02:33, Johann Hugo <jh...@meraka.csir.co.za> wrote:
> Hi
> We have an outdoor wifi mesh network with various atheros adapters configured
> in adhoc mode. (FreeBSD-9)


Please try -HEAD. I _think_ I've handled the WME configuration side of
things right in IBSS mode.

The problem with IBSS is that nodes are automatically created whenever
frames are received; then a beacon frame will update the current
configuration. So if you create an IBSS STA node based on receiving a
data frame (and not a beacon) then it may create things with no WME
config, and it'll just default to the default (non-aggressive mode)
WME parameters.

Now, my -HEAD patch may actually be incorrect, because it changes the
global WME config for that particular device; there's no real per-node
WME configuration unfortunately. I don't have a very large IBSS setup
to test how this works in practice and I will admit I haven't sat down
and really tried to understand / implement IBSS stuff in any useful
fashion. But it did come up and it did parse the WME IE correctly.

So just make sure you configure the WMM parameters on both sides to
have aggressive BE parameters (aifs 2, cwmin4, cwmax 10, txop 64) and
then reassociate.

I may end up reverting the WME IE parsing for now and just requiring
people statically configure the WME parameters on each node. I'll
experiment some more and then commit it to -HEAD. But the ath IE
parsing works and I now see fast-frames used in adhoc mode, which will
bump the throughput up a bit on the non-11n NICs.

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