Return-path: Received: from crystal.sipsolutions.net ([195.210.38.204]:32799 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752311AbYALKPR (ORCPT ); Sat, 12 Jan 2008 05:15:17 -0500 Subject: Re: channel utilisation short/long hdr? From: Johannes Berg To: Jouni Malinen Cc: linux-wireless , Michael Wu In-Reply-To: <20080112024400.GC12245@jm.kir.nu> References: <1199922658.3861.40.camel@johannes.berg> <20080112024400.GC12245@jm.kir.nu> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-3eBLVJbIIV5jWaWCWLh9" Date: Sat, 12 Jan 2008 11:15:00 +0100 Message-Id: <1200132900.3528.22.camel@johannes.berg> (sfid-20080112_101527_157595_21B1F386) Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: --=-3eBLVJbIIV5jWaWCWLh9 Content-Type: text/plain Content-Transfer-Encoding: quoted-printable > Hmm.. I thought I had filtered out the channel use estimation code from > the original release since I did not see much use for this and the > values were not exactly valid in many cases.. ;-).=20 Heh. > This code is almost five years old and maybe not so surprisingly, I > don't remember the exact details anymore.. Since these are use as > "hdrtime", I would assume they were derived using following calculation: Right. Thanks for the values, I guess that if we really wanted to keep that stuff maintainable we should rewrite it and take into account preamble length too etc. I'm not too keen on that though, would anybody object if we'd just kill it? > That would be any rate using Extended Rate PHY (ERP; 802.11 Clause 19). > This is not necessarily OFDM (it could also be using PBCC modulation). > In practice, I would expect the kernel side implementation to use this > in anything PHY related as ERP-OFDM (i.e., it may not support optional > PBCC rates). The association and beacon/probe processing may be more > generic to any ERP rate. I don't think ERP-PBCC is very commonly used, > so this may be more on the theoretical side.. Oh, right, I keep forgetting about the optional rates. Thanks, johannes --=-3eBLVJbIIV5jWaWCWLh9 Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Comment: Johannes Berg (powerbook) iQIVAwUAR4iTI6Vg1VMiehFYAQIZkxAAgK9qBrFFARvNzXS6a15XxUALGZohfeWm UiZxVEzjNQNPLPx7OM1DjzdUSMyWHOOTJ+4fMqdWMlrjGojHS0Js7IElHY3ORfqk kJ95P2BmseUMVhMrSPI03/FpJz4l39U+ea3N+CG3I8HLstxTrUee2Fneb0zkqiWP 1MxUVyHSoWs03T23/aOMpcC9vYMhiRpiN0vxMY1mNddGET3oLG8aLHu6M1My/C+W wZZl2pvdO0nrQN13sjKJJH1I55o3LnMHw5nG+IX3diHoUfv2mIxve/KnsDd8ncrF oK3Z7zzWTqIRq9KdXFE0wz/2tTBpbm59TQKVqSyHjPQrBw07PvaO1sq3sqUt11hz 8a5tZ7UMViYw5T/eaKT1uJgQXoa5jn61g2VSz6ECBNQY30hqmCO+80Tm/FAomKFw 9nCPXqa0oQgLPFa78HM6ADaWWctznkuUoYZWxsgbLltYur8i1h9QxuDCCQ9K2vET 7N1zmMDJ+2+81HGM8Z4Ml2QTJYyaYq+Zt2gkO2z3r8flt5VRLvN/9B4EqTvladxy 1J/M1d1jhMk8/tSQVaaQ10N9JO4iLdv+137zIAIm5ZUPrnPM/aecDvLbgZ1hm1Qb l6x7BRopBVwWP2plh83m64iWifunhD/KpCsAaSW1wI6LBIBWdW197GmEulNcLnvh s2V6U/BJ8yw= =RG8K -----END PGP SIGNATURE----- --=-3eBLVJbIIV5jWaWCWLh9--