Return-path: Received: from mail-pz0-f52.google.com ([209.85.210.52]:60407 "EHLO mail-pz0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751269Ab2CaCBP (ORCPT ); Fri, 30 Mar 2012 22:01:15 -0400 Received: by dake40 with SMTP id e40so165491dak.11 for ; Fri, 30 Mar 2012 19:01:14 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: Date: Fri, 30 Mar 2012 19:01:14 -0700 Message-ID: (sfid-20120331_040118_860466_C93F4F11) Subject: Re: Dual-band support for AP mode for AR9280? From: Adrian Chadd To: Harshal Chhaya Cc: linux-wireless Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: On 30 March 2012 14:04, Harshal Chhaya wrote: > Hello, > > The 'ath9k' project page > (http://linuxwireless.org/en/users/Drivers/ath9k) mentions that '2x2 > DB 11n' operation is supported for AR9280. A later section says that > 'AP mode' is supported. These are both true. > Does the AP mode support full 11n features in a dual-band > configuration? Is there a hard limit to the number of clients when the > AR9280 is used as an AP? I am currently using an AR9170 (using > carl9170 - thanks, Christian) as an AP and found that I had to switch > to software encryption to scale beyond 32 clients because of the > number of key slots on the chip. Yes. It's a dual band chip, but you only get to choose one band at a time. Yes, there are limited keycache slot chips. I don't remember if the hardware limit is 32 or 64 clients. > And are the numbers in the 'power consumption' analysis > (http://linuxwireless.org/en/users/Drivers/ath9k/power-consumption) > for STA mode or AP mode? The 'PS On' configuration implies that this > is for an STA mode but I wanted to confirm. You should always do your own power consumption tests. It differs based on operating mode, environment, TX rate selection/power, what kind of amplifiers and other circuitry are on the NIC, etc. Adrian