Return-path: Received: from mail-wy0-f174.google.com ([74.125.82.174]:33418 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753519Ab1CGVJ2 (ORCPT ); Mon, 7 Mar 2011 16:09:28 -0500 Received: by wyg36 with SMTP id 36so4589360wyg.19 for ; Mon, 07 Mar 2011 13:09:27 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: Date: Mon, 7 Mar 2011 21:09:26 +0000 Message-ID: Subject: Re: WMM and 802.11n Qurery, please help! From: "M. A." To: ath9k-devel@lists.ath9k.org, linux-wireless@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: Dear all, Just an update to my previous query regarding the relation between WMM and 802.11n: Now from what I understand, WMM (802.11e) is part of the 802.11n standard as it uses features (like block-Ack) in the new (MAC layer) enhancements such as frame aggregation. When WMM is activated (via hostapd: wmm_enabled=1) as well as frame aggregation, I get around 230Mbps UDP/ 170Mbps TCP. When WMM is deactivated I get 35 Mbps UDP and 27 Mbps TCP. I tried to identify the causes of this decrease, so I disabled frame Aggregation (A-MPDU) and disabled all the WMM associated parameters like tx_queue_data* , wmm_ac_* (BK/BE/VI/VO) /(CW/TXOP/AIFS) etc. but leaving the WMM option on (wmm_enabled=1). This gave around 45 Mbps UDP and 33Mbps TCP. So my question is what other WMM influencing factor is activated that is causing the remaining throughput increase from 35 Mbps to 45 Mbps. Also if someone could explain the WMM traffic identifier's (TID) relevance in throughput improvement. Thank you all very much