Return-path: Received: from mail-wy0-f174.google.com ([74.125.82.174]:40888 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753420Ab1CHQrZ convert rfc822-to-8bit (ORCPT ); Tue, 8 Mar 2011 11:47:25 -0500 Received: by wya21 with SMTP id 21so148929wya.19 for ; Tue, 08 Mar 2011 08:47:24 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: Date: Tue, 8 Mar 2011 16:47:24 +0000 Message-ID: Subject: Re: WMM and 802.11n Qurery, please help! From: "M. A." To: Mohammed Shafi Cc: 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: Hi, Thank you, but I have read the discussion in that thread and it does not answer my question. I would be grateful someone could point out what other 802.11n throughput improving enhancement other than frame aggregation(A-MPDU) depend on WMM being enabled via hostapd. Thanks On Tue, Mar 8, 2011 at 5:20 AM, Mohammed Shafi wrote: > On Tue, Mar 8, 2011 at 2:39 AM, M. A. wrote: >> 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. > > Hi, > ?please read through the discussion in this thread "Why is wmm_param > required for HT40- in mlme.c" in linux wireless mailing list > >> >> >> 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 >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at ?http://vger.kernel.org/majordomo-info.html >> >