Best practise for 802.11ac channel deployment planning

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  • Updated 4 years ago
In many dense installations we tend to manually fix channels on Access Points, especially when the deployment is really dense and we are creating smaller Microcells.

This has always been straight forward with a/b/g/n radios, but the dynamic channel width behaviour of 802.11ac which needs 1 base channel and can then use additional 20 resp. 60 MHz above and/or below gives me the question of what would be the best choice of the base channel.

In Switzerland we can use 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108 and 112. Which is equivalent to 3 x 80MHz channels.

So how would I deploy the base channels when I have a floor with, say, 5 AP230? Would I choose the first channel inside a 80MHz band and then alternate?

Example: 36, 52, 100, 36, 52

Or would it be better to shift by 40MHz when we re-use channels?

Example: 36, 52, 100, 44, 60

Or would it be better to always choose a base channel that is more "in the middle" in the first place? Like 40, 56 and 104?

Or - especially when I assume that 80MHz wide channels don't always have to be used - be more flexible with more channel choices available, like 40, 52, 64, 108?

Example: 40, 52, 64, 108, 40, 52, 64, ....

And combined with shifting:

Example: 40, 52, 64, 108, 44, 56, 100, 112, 36, 48, 60, 104, ...

Any ideas?

carsten
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Carsten Buchenau, Champ

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Posted 4 years ago

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