Re: [Madwifi-devel] Madwifi Soft MAC
Status: Beta
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From: Eric W A. <Eric.Anderson@Colorado.EDU> - 2009-04-30 16:19:14
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A few people have done things pretty close to what you describe: See for example FatVAP (http://nms.lcs.mit.edu/~kandula/projects/fatvap/). Thus spake Alfred Arnold (al...@cc...): > Hi, > > >Can someone help me understand why can't I have more than one STA in the > >same physical interface? > >Why can I have more than one ap but I can only have one STA? > > Don't forget you only have one physical radio. A STA's nature is to > associate to an AP, on a channel dictated by the AP. If the APs > operate on different radio channels, you would have a problem because the > radio can only be programmed for one channel. So this could only work > reasonably if the the APs the different 'VSTAs' associate to are operating > on the same channel, a scenario you typically want to avoid for bandwidth > and performance reasons... > > In my wildest dreams, I could imagine a STA 'switching' the single > radio among the channels of its different APs - each time it switches away > from a channel, it tells the respective AP that it entered power save mode > so the AP buffers incoming traffic until the station comes back. That > would however incur a lot of software overhead and anything else but good > performance. > > On the PA side, the scenario is different because the AP dictates the > radio channel - so all VAPs (and all the stations associated to the > VAPs) simply operate on the same one... > > Best regards > > Alfred Arnold > > -- > Alfred Arnold E-Mail: al...@cc... > Computer Club at the http://john.ccac.rwth-aachen.de:8000/alf/ > Technical University Phone: +49-241-406526 > of Aachen Fax: +49-241-406527 > > > ------------------------------------------------------------------------------ > Register Now & Save for Velocity, the Web Performance & Operations > Conference from O'Reilly Media. Velocity features a full day of > expert-led, hands-on workshops and two days of sessions from industry > leaders in dedicated Performance & Operations tracks. Use code vel09scf > and Save an extra 15% before 5/3. http://p.sf.net/sfu/velocityconf > _______________________________________________ > Madwifi-devel mailing list > Mad...@li... > https://lists.sourceforge.net/lists/listinfo/madwifi-devel -- Eric W. Anderson University of Colorado eri...@co... Dept. of Computer Science phone: +1-720-984-8864 Systems Research Lab - ECCR 1B54 PGP key fingerprints: personal: 1BD4 CFCE 8B59 8D6E EA3E EBD5 4DC9 3E61 656C 462B academic: D3C5 D6FF EDED 9F1F C36D 53A3 74B7 53A6 3C74 5F12 |