Return-path: Received: from cp-out2.libero.it ([212.52.84.102]:39998 "EHLO cp-out2.libero.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752392AbZEVKMH convert rfc822-to-8bit (ORCPT ); Fri, 22 May 2009 06:12:07 -0400 Date: Fri, 22 May 2009 12:12:00 +0200 Message-Id: Subject: Re: mac80211: TDMA approach feasible? MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII From: "ffileppo" To: "kalle\.valo" Cc: "linux-wireless" Sender: linux-wireless-owner@vger.kernel.org List-ID: > > I was wondering if with mac80211 is now possible (and what effort is > > needed) to implement a TDMA approach. In particular I would like to: > > override 802.11 MPDU frame format, eliminate RTS/CTS exchange, > > eliminate automatic ACK and retransmission, eliminate virtual carrier > > sense (NAV), control PHY clear channel assessment and control > > transmission backoff. > > Most of this is usually implemented in firmware, so you need access to > firmware sources. > Hi, thanks for your answer. If these features are implemented in firmware, it should be possible to modify them if using for example Ath5k (which is a completely FOSS Linux driver) Right? Could you give me any directions? Talking about the TDMA implementation I was wondering if it is possible to achieve a time granularity of 1?s using commercial-of-the-shelf wifi cards (e.g. atheros ones). I would appreciate any ideas or thoughts on this matter. Thank you, Francesco