From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cassarossa.samfundet.no (cassarossa.samfundet.no [IPv6:2001:67c:29f4::29]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id E19E121F5B8 for ; Fri, 22 Aug 2014 17:03:54 -0700 (PDT) Received: from pannekake.samfundet.no ([2001:67c:29f4::50] ident=unknown) by cassarossa.samfundet.no with esmtps (TLS1.2:DHE_RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1XKyoB-0000TY-6Z; Sat, 23 Aug 2014 02:03:52 +0200 Received: from sesse by pannekake.samfundet.no with local (Exim 4.80) (envelope-from ) id 1XKyoA-0004Wl-S0; Sat, 23 Aug 2014 02:03:50 +0200 Date: Sat, 23 Aug 2014 02:03:50 +0200 From: "Steinar H. Gunderson" To: David Lang Message-ID: <20140823000350.GB8026@sesse.net> References: <91696A3A-EF44-4A1A-8070-D3AF25D0D9AC@netapp.com> <20140821085803.GA21250@sesse.net> <20140822234158.GB1272@sesse.net> <20140822235630.GA8026@sesse.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20140822235630.GA8026@sesse.net> X-Operating-System: Linux 3.16.0-rc5 on a x86_64 User-Agent: Mutt/1.5.21 (2010-09-15) Cc: bloat@lists.bufferbloat.net Subject: Re: [Bloat] sigcomm wifi X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 23 Aug 2014 00:03:55 -0000 On Sat, Aug 23, 2014 at 01:56:30AM +0200, Steinar H. Gunderson wrote: >>> I've tested this in the real world. It works really well. (It's also pretty >>> much standard practice in high-density Wi-Fi, from what I've been told.) >> Ok, then I'm back to "how can I do this on OpenWRT"? :-) > No idea there, sorry. Oh, if it helps you anything, it seems to be based on 802.11h, and http://wiki.openwrt.org/doc/uci/wireless seems to indicate it's supported... for some drivers only. Maybe. The information element number seems to be 0x20 (WLAN_EID_PWR_CONSTRAINT), and I can see it (undecoded) in iwlist: IE: Unknown: 200103 Which means length=1, turn down 3 dB from regulatory limits (which is inferred from country, set in some other IE). /* Steinar */ -- Homepage: http://www.sesse.net/