Return-path: Received: from mail-wg0-f50.google.com ([74.125.82.50]:50163 "EHLO mail-wg0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750720AbaFIOJS (ORCPT ); Mon, 9 Jun 2014 10:09:18 -0400 Message-ID: <1402322954.11505.10.camel@umadbro> (sfid-20140609_160936_014589_45D5B783) Subject: Re: [RFC 0/4 v2] cfg80211/mac80211: Add new interface type for OCB (Outside the Context of a BSS) mode From: Rostislav Lisovy To: Johannes Berg Cc: "John W. Linville" , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Michal Sojka , s.sander@nordsys.de, jan-niklas.meier@volkswagen.de, Rostislav Lisovy Date: Mon, 09 Jun 2014 16:09:14 +0200 In-Reply-To: <1401826536.4157.54.camel@jlt4.sipsolutions.net> References: <1401468984-24575-1-git-send-email-rostislav.lisovy@fel.cvut.cz> (sfid-20140530_185636_416967_38B72FDB) <1401826536.4157.54.camel@jlt4.sipsolutions.net> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Tue, 2014-06-03 at 22:15 +0200, Johannes Berg wrote: > it's unclear to me how the bitrate is > selected, are there even different bitrates? My understanding is that since we are using OFDM we have to support at least 3, 6, 12 Mb/s data rates (says 802.11-2012, Chapter 18.1.1, second paragraph). How to choose it when transmitting? That should probably be defined in some standard built on top of "802.11p" -- the European "Intelligent Transport System" standard ETSI EN 302 663 defines different channels in 5.9 Ghz band along with the "default data rate" (Table 2, Chapter 4.3). For example Control Channel (nr. 180) has data rate 6 Mb/s, while Service Channel 2 (nr. 178) has data rate 12 Mb/s. Regards; Rostislav