Date: 25 Sep 2006 00:31:52 +0200 From: Dmitry Karasik <dmitry@karasik.eu.org> To: freebsd-stable@freebsd.org Subject: Re: ath0 weak connectivity Message-ID: <84r6y0c2w7.fsf@tetsuo.karasik.eu.org> In-Reply-To: Sam Leffler's message of "Sat, 23 Sep 2006 18:06:14 -0700" References: <20060918083139.GA59966@tetsuo.karasik.eu.org> <450ED7AA.6090801@errno.com> <84wt7ubjwy.fsf@tetsuo.karasik.eu.org> <4515DA06.1070402@errno.com>
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Sam> I've lost context about your problem but it appears you're having Sam> trouble associating with "trejago" sometimes. The failed scan shows Sam> that your rssi was only 6 when you were having problems which is a Sam> very marginal signal so I'm not at all surprised you're having Sam> trouble. You've got strong signal ap's on overlapping channels (5 Sam> and 7) which are likely drowning the signal on your ap. I don't see Sam> anything the driver could do differently; this seems more an issue of Sam> your environment being very busy. I vaguely recall you were Sam> comparing the operation of the freebsd to windows. If so then I also thought of the environment issue, but it seems to me that the problem might still be elsewhere. Initially I encountered problems when I set up AP to transmit at 12% of full power, so logically I assumed that this must be not enough, and turned the AP signal up to 25, 50, and finally to 100%. What's interesting is that even on 100%, SNR wasn't really different from when it was 12%, and again ath0 didn't associate. This is doubly strange because the neighbor APs are located behind 2-3 solid brick walls, and still their SNR is 5 times higher than from my AP which is just nearby. Even when distance to AP is <1m, SNR is still comparable. Of course, I cannot control their AP signal strength, but I'd be interested to measure the signal strength from my and their APs independently, I guess there should be some regulations about max signal power... Also, I tried another channel, switching to channel 13 - did not help at all. Sam> freebsd does not support XR mode. Are there plans for implementing XR mode for ath? -- Sincerely, Dmitry Karasik
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