Slow wireless

Jouni Malinen jkmaline at cc.hut.fi
Sun Oct 8 23:03:35 EDT 2006


On Mon, Oct 02, 2006 at 03:27:52PM -0400, Greg Stark wrote:

> The card is only an 11Mb/s WMP11 but still that should be plenty for my needs.
> Instead I'm seeing a maximum of about 300kbytes/s when I'm sitting directly
> beside the access point. And when I move to the next room I see it around
> 80kbytes/s (actually it jumps around quite a bit between 40kbytes/s to
> 110kbytes/s).

> The hostap box is actually a pretty slow cpu so 300kbytes/s may actually be
> about as fast as it can go. That's about as fast as I see on my upstream
> connections. But there's really no reason I can imagine to be seeing the
> abysmal numbers in the area of 100kbytes/s.

How slow a CPU are we talking about? I've seen ca. 6 Mbps connections
without problems on 166 MHz PowerPC..

> In the logs I see the rate jumping around between 1MB/s, 2MB/s, 5.5MB/s, and
> 11MB/s. And the noise floor seems awfully high on the client end. But I don't
> know where to go from here debugging this.

What kind of equipment do you have available for debugging this? Any
chance of having a wireless sniffer to capture the frames sent between
the AP and client?

-- 
Jouni Malinen                                            PGP id EFC895FA



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