Return-path: Received: from he.sipsolutions.net ([78.46.109.217]:47380 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932464Ab0E0MNu (ORCPT ); Thu, 27 May 2010 08:13:50 -0400 Subject: Re: [PATCH] mac80211: mark 1, 2, 5.5 and 11Mbps as mandatory rates for 802.11b From: Johannes Berg To: Benoit Papillault Cc: Bruno Randolf , linville@tuxdriver.com, juuso.oikarinen@nokia.com, ath5k-devel@lists.ath5k.org, linux-wireless@vger.kernel.org In-Reply-To: <4BFE60EF.7020800@free.fr> References: <1274883276.3658.15.camel@jlt3.sipsolutions.net> <20100527004545.11541.88667.stgit@tt-desk> <1274947716.3669.13.camel@jlt3.sipsolutions.net> <4BFE60EF.7020800@free.fr> Content-Type: text/plain; charset="UTF-8" Date: Thu, 27 May 2010 14:13:40 +0200 Message-ID: <1274962420.3669.39.camel@jlt3.sipsolutions.net> Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Thu, 2010-05-27 at 14:09 +0200, Benoit Papillault wrote: > 802.11a = Clause 17, called OFDM > 802.11b = Clause 15 (called DSSS) & Clause 18 (called HR/DSSS). Are you sure? Isn't clause 15 pre-amendement? > Clause 15 defines 1 Mbits and 2 Mbits rates, long PLCP only > Clause 18 defines 5.5 Mbits and 11 Mbits. Optionally, short PLCP is > available for 2 Mbits, 5.5 Mbits and 11 Mbits. Since it's optional, such > short PLCP rates are probably not part of the mandatory rates. > > Basic rate set must includes mandatory rates set. I don't think this is true. > This is apparently > what every other AP do today and I indeed see no points in adding more > rates to the basic rate set other than what is already defined in the > mandatory rate set (except we cannot rely on this rule when joining an > existing BSS/IBSS, of course). Sure, you can add more than say 11b mandatory rates to specifically exclude non-11g stations from it to improve performance. johannes