wifi for 600, alex

Fri Feb 16 11:36:25 UTC 2007

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.
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