From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Szlezak Date: Tue, 11 Sep 2012 15:54:38 +0200 Subject: [ath9k-devel] Disable b mode and prioritize ack on 5 GHz In-Reply-To: <20120906100935.GA10132@jouni.qca.qualcomm.com> References: <20120906100935.GA10132@jouni.qca.qualcomm.com> Message-ID: <504F429E.7070709@szlezak.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ath9k-devel@lists.ath9k.org Hi Jouni, Thanks for your elaborate answer. Am 06.09.2012 12:09, schrieb Jouni Malinen: > On Wed, Sep 05, 2012 at 05:11:23PM +0200, Alexander Szlezak wrote: >> - kick clients with bad rssi after some time (hostapd) >> - deactivate b modes (how can that be done didn't find settings for this) >> - slow down 2.4ghz association with acks to lure 5ghz capable devices to >> the available 5ghz aps >> - increase dtim interintervals to reduce Beacon airtime usage > > You can two (2) and (4) with hostapd configuration (though, increases > DTIM period would not really have that noticeable differences; maybe you > were thinking of Beacon interval instead). You're right, i meant Beacon interval. I thought longer beacon interval on 2.4 could lure dual frequency devices into 5ghz band too. Still have to test it. (1) and (3) would require > changes to current implementation. There are various ways of trying to > encourage the station to another AP, but all these come at some risk of > interop issues since some stations simply don't like being told so in > vendor specific ways.. ;-) hm, those changes are probably out of scope for the project I'm planning considered the required testing. > >> What is possible and can be recommended in a setup with 6 2.4ghz aps and 4 >> 5ghz aps which I try to setup with minimum output power for spatial >> separation > > Do you know what kind of station devices are going to be there? Do you > need to support 802.11b devices at all? Actually not. I suspect multiple devices per user and mostly mobile devices which usually have low b penetration (currently 54 % iphone which are g compatible) in our networks. I thought maybe i reserve one frequency for b devices with your proposed settings. Do you need any long range > connections to the these APs? no, absolutely not, just about 20 meters in radius If not, I would just disable lowest couple > of TX rates and potentially configure some channels to have HT-only > configuration if you expect to see relatively large percentage of HT > capable stations. yep sounds reasonable! Doing many of the more active load balancing tricks > will require code changes (likely in hostapd) (and experimentation to > verify it does not break deployed stations badly). I will first test the other options as we probably have not enough time to do radical changes. > To prevent 802.11b stations from associating: add one of the OFDM rates > (say, 6 Mbps) into basic_rates parameter into hostapd.conf. Ok perfect. I'll try to have Ap's equipped with that setting except for one for the b clients and see if the properly find it. > To allow only HT stations, add require_ht=1 into hostapd.conf. I'll try to do the same as above and see if I get the right clients there. best, Alexander -- Follow me on Twitter @ http://twitter.com/magicshark __________________________________________________________________ Mag. Alexander SZLEZAK Reischergasse 6/2 A-1130 Vienna Austria M +43 699 1 350 41 01 E alex at szlezak.com https://www.xing.com/profile/Alexander_Szlezak