Re: [Madwifi-devel] Madwifi Soft MAC

[Eric W A. <Eric.Anderson@Colorado.EDU>]

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
> 
> 
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-- 
Eric W. Anderson                                   University of Colorado
eri...@co...                      Dept. of Computer Science
phone: +1-720-984-8864                   Systems Research Lab - ECCR 1B54

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