wifi for 600, alex

Mon Feb 19 15:07:00 UTC 2007

Alexander,

as you might imagine, conceptually there is no disagreement  
whatsoever here ;-)  And, in fact, that already exists on some  
platforms, but it's somewhat limited at the moment due to lack of  
support for standards body/bodies at this time.  But I'm hopeful that  
we're closer to meaningful improvements.  This is just as important  
for managing the available spectrum as it is for device power  
efficiency.

Best regards,
Christian

On Feb 16, 2007, at 6:36 AM, Alexander Harrowell wrote:

> Another mobile-land feature 802.11 could do with - dynamic TX power  
> management.  All the cellular systems have the ability to dial down  
> the transmitter power the nearer to the BTS/Node B you get. This is  
> not just good for batteries, but also good for radio, as s/n has  
> diminishing returns to transmitter power. WLAN, though, shouts as  
> loud next to the AP as on the other side of the street, which is  
> Not Good for a system that operates in unlicensed spectrum.
>
> UMTS, for example, has a peak tx wattage an order of magnitude  
> greater than WLAN, but due to the power management, in a picocell  
> environment comparable to a WLAN the mean tx wattage is less by a  
> factor of 10.