11n certification

I notice that the WiFi Alliance has commenced testing of 11n devices and
changed their logos.
<http://www.wi-fi.org/news_articles.php?f=media_news&news_id=892>

One of the comments that surprised me was:-

"The updated Wi-Fi CERTIFIED n program maintains the requirements
of the draft 2.0 program and adds testing for some new optional
features, including:

* Channel coexistence measures for "good neighbor" behavior when
using 40 MHz operation in the 2.4 GHz band"

I presume from that statement there are a lot of draft n devices which
have not been tested for coexistence and possibly are not capable of
providing "good neighbour" behaviour. Seems as though I cannot assume
that 11n 2.4GHz devices will automatically switch to 20MHz channels when
"G" AP's are within range.

On Sun, 04 Oct 2009 17:54:39 +0100, LR <lrme@privacy.net> wrote in
<WuCdnb68eI7NTlXXnZ2dnUVZ8mudnZ2d@bt.com>:

>"The updated Wi-Fi CERTIFIED n program maintains the requirements
> of the draft 2.0 program and adds testing for some new optional
> features, including:
>
> * Channel coexistence measures for "good neighbor" behavior when
> using 40 MHz operation in the 2.4 GHz band"
>
>I presume from that statement there are a lot of draft n devices which
>have not been tested for coexistence and possibly are not capable of
>providing "good neighbour" behaviour. Seems as though I cannot assume
>that 11n 2.4GHz devices will automatically switch to 20MHz channels when
>"G" AP's are within range.

What a shock. Not.

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