Re: [wireless-regdb] [PATCH] regdb: allow 40 MHz on world roaming channels 12/13

[Johannes Berg <johannes@sipsolutions.net>]

On Tue, 2012-12-04 at 10:54 -0800, Luis R. Rodriguez wrote:

> >> As I implemented it, it should be checking if HT40 is used. If so then
> >> it should be checking to see if the primary can use 40 MHz bandwidth
> >> and then check to see if the secondary can use 20 MHz. The issue
> >> should be that the code should likely is checking that the secondary
> >> requires 40 MHz. It should only need to check if the secondary can use
> >> 20 MHz if HT40 is desired.
> >
> > I don't think this is really what we should do ... In fact given the way
> > we do it now with overlapping freqbands this would cause more problems
> > than it would solve, I think.
> 
> If we end up supporting overlapping frequency rules to be submitted.
> Right now they don't overlap but point taken that we do support it and
> there may possible issue of having them supported.

00 has overlapping rules today, also JP and KP

> > What it really should check is that for each freqband, as much bandwidth
> > is allowed as falls into that freqband. But given that we have
> > overlapping freqbands, much bandwidth will actually fall into each one
> > of them, so we must allow @40 again ...
> >
> > I'm drawing some pictures now :-)
> 
> :) Lets be clear though that your points on overlapping frequency
> rules are a separate architectural position to take than addressing
> the issue at hand. This however is a good crux point for us to
> evaluate this particular architectural consideration.

Agree.

johannes


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