From: Kalle Valo <kalle.valo@iki.fi>
To: Christian Lamparter <chunkeey@googlemail.com>
Cc: Jan Kiszka <jan.kiszka@web.de>, linux-wireless@vger.kernel.org
Subject: Re: [RFT] ar9170: AP broadcast buffering
Date: Mon, 07 Dec 2009 22:08:32 +0200 [thread overview]
Message-ID: <87aaxu4ke7.fsf@purkki.valot.fi> (raw)
In-Reply-To: <200912071736.40929.chunkeey@googlemail.com> (Christian Lamparter's message of "Mon\, 7 Dec 2009 17\:36\:40 +0100")
Christian Lamparter <chunkeey@googlemail.com> writes:
> Now the problem is that under traffic the BC/MC frames might
> be delayed in the tx_pending queues and don't make it in time.
I don't know what time constraints you refer to here, but clients
should stay awake until they have received a multicast/broadcast
message with the moredata bit disabled. So, in theory, it doesn't
matter even if the frames are transmitted even 20 ms after the beacon.
(In practise some hardware might have timers for this, I think at
least wl1251 had one.)
Of course the downside is the increased power consumption. But it's
still better than to not receive the multicast/broadcast frames at all :)
--
Kalle Valo
next prev parent reply other threads:[~2009-12-07 20:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-29 1:06 [RFT] ar9170: AP broadcast buffering Christian Lamparter
2009-12-06 18:23 ` Jan Kiszka
2009-12-07 16:36 ` Christian Lamparter
2009-12-07 20:08 ` Kalle Valo [this message]
2009-12-07 21:31 ` Christian Lamparter
2009-12-08 7:23 ` Kalle Valo
2009-12-08 21:51 ` Jan Kiszka
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