Subject: Re: [PATCH] mac80211: enable IBSS merging
From: Johannes Berg <johannes@sipsolutions.net>
To: bruno randolf <bruno@thinktube.com>
Cc: ath5k-devel@lists.ath5k.org, mcgrof@gmail.com, jirislaby@gmail.com,
	mickflemm@gmail.com, linux-wireless@vger.kernel.org,
	linville@tuxdriver.com, flamingice@sourmilk.net, jbenc@suse.cz
In-Reply-To: <200802121225.02045.bruno@thinktube.com>
References: <1202209693.4395.29.camel@johannes.berg>
	 <20080206024957.22838.82194.stgit@one>
	 <1202341955.9965.26.camel@johannes.berg>
	 <200802121225.02045.bruno@thinktube.com>
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Date: Tue, 12 Feb 2008 10:52:03 +0100
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> true. i was not aware that the beacon timestamp is taking PHY delays into=
=20
> account and wrongly asumed that the RX timestamp should always be a bit=20
> later.
> (which is also what i saw on my atheros hardware: we usually get the RX=20
> timestamp about 60 to 300 usec later than the beacon timestamp, but it's=20
> quite likely that we have not calibrated everything 100% correctly.)

Later actually surprises me, are you sure it's not earlier? If
everything was calibrated perfectly it should be 192 usecs earlier (24*8
bytes at the most common 1mbit beacon rate).

johannes

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