Return-path: Received: from smtp.nokia.com ([131.228.20.172]:23365 "EHLO mgw-ext13.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756495AbXKOJpT (ORCPT ); Thu, 15 Nov 2007 04:45:19 -0500 To: Johannes Berg Cc: Jouni Malinen , Michael Buesch , linux-wireless , Ben Greear , Michael Wu , Jiri Benc Subject: Re: [RFC] b43: multiple MAC addresses support References: <1194572631.4793.64.camel@johannes.berg> <1194605550.4793.93.camel@johannes.berg> <20071111025808.GK4031@jm.kir.nu> <87pryfd8cc.fsf@nokia.com> <1194953217.9116.38.camel@johannes.berg> From: Kalle Valo Date: Thu, 15 Nov 2007 11:35:29 +0200 In-Reply-To: <1194953217.9116.38.camel@johannes.berg> (ext Johannes Berg's message of "Tue\, 13 Nov 2007 12\:26\:57 +0100") Message-ID: <877ikjsvfi.fsf@nokia.com> (sfid-20071115_094523_580662_AEE9CE83) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-wireless-owner@vger.kernel.org List-ID: Johannes Berg writes: > On Mon, 2007-11-12 at 13:14 +0200, Kalle Valo wrote: > >> Exactly, it is important for small mobile devices that beacons are >> sent at the correct time. For example, I have seen broken APs which >> Target Beacon Transmission Time fluctuates and Nokia N800 has high >> power consumption because of that. > > The N800 and similar devices only wake up at DTIM beacons, right? At least N800 and N810 do, we don't want to miss any of broadcast and multicast traffic. But I don't know how other mobile devices wakeup for beacons. > So another idea would be to burst beacons but make sure the DTIM > beacon time doesn't fluctuate away from the DTIM TBTT. This would be > possible by changing the order of the beacons and adjusting the DTIM > count so that the beacon with DTIM count zero is always the first. At least from my point of view that could possible. Of course it feels like a bit of a hack, but I guess there's no clean way to implement this. -- Kalle Valo