Return-path: Received: from nick.hrz.tu-chemnitz.de ([134.109.228.11]:45571 "EHLO nick.hrz.tu-chemnitz.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751996Ab3EITq2 (ORCPT ); Thu, 9 May 2013 15:46:28 -0400 Date: Thu, 9 May 2013 21:46:20 +0200 From: Simon Wunderlich To: Felix Fietkau Cc: linux-wireless@vger.kernel.org, Johannes Berg , Mathias Kretschmer , Simon Wunderlich Subject: Re: [PATCH 2/8] mac80211: fix various components for the new 5 and 10 MHz widths Message-ID: <20130509194620.GA24307@pandem0nium> (sfid-20130509_214631_972367_DC87BF56) References: <1368123036-22721-1-git-send-email-a> <1368123036-22721-3-git-send-email-a> <518BEB88.5090600@openwrt.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="45Z9DzgjV8m4Oswq" In-Reply-To: <518BEB88.5090600@openwrt.org> Sender: linux-wireless-owner@vger.kernel.org List-ID: --45Z9DzgjV8m4Oswq Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello Felix, On Thu, May 09, 2013 at 08:31:36PM +0200, Felix Fietkau wrote: > On 2013-05-09 8:10 PM, a@pandem0nium wrote: > > From: Simon Wunderlich > >=20 > > This is a collection of minor fixes: > > * don't allow HT IEs in IBSS for 5/10 MHz > > * don't allow HT IEs in Mesh for 5/10 MHz > > * consider 5 and 10 MHz channels when downgrading > > * don't try HT rates for 5 and 10 MHz channels when selecting rates > Why? HT rates work with 5/10 MHz just fine. Hm, to be honest I did not try - IEEE 802.11-2012 only mentions 5 and 10 MHz channels in section 18 (OFDM PHY) according with timing and other parameters, but nothing like this (as far as I see) is mentioned in Section 20 (High Throughput PHY). On the other hand, it appears that AR9xxx based chipsets also support 2.4 GHz rates (DSSS, ERP-OFDM), so I can imagine also HT rates can be supported as well. The question is, how would we handle that? Allow HT IEs also for 5 and 10 MHz, and behave like it would be a 20 MHz channel? Are there any other WiFi chipsets which support 5/10 MHz, should we consider them (maybe they don't support that)? And what do others think about deviate =66rom standard? Personally, I don't mind, it would be cool to use HT rates on these bandwidths too. :) Cheers, Simon --45Z9DzgjV8m4Oswq Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEARECAAYFAlGL/QwACgkQrzg/fFk7axZe4wCg0YCBqPNQ02TbKpf5lHYUiYGo oaQAn3J50xKJGgBrNwSvSFpq6Ssu6HxO =dGq9 -----END PGP SIGNATURE----- --45Z9DzgjV8m4Oswq--