[94980] in North American Network Operators' Group
Re: wifi for 600, alex
daemon@ATHENA.MIT.EDU (Alexander Harrowell)
Fri Feb 16 06:37:23 2007
Date: Fri, 16 Feb 2007 11:36:25 +0000
From: "Alexander Harrowell" <a.harrowell@gmail.com>
To: "Christian Kuhtz" <kuhtzch@corp.earthlink.net>
Cc: nanog@nanog.org
In-Reply-To: <22AEA580-996F-430C-B652-78DA205A0486@corp.earthlink.net>
Errors-To: owner-nanog@merit.edu
------=_Part_3530_12340194.1171625785612
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
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.
------=_Part_3530_12340194.1171625785612
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
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.
<br><br>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.<br>
------=_Part_3530_12340194.1171625785612--
