Here is another excerpt on SmartBeam:
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www.dvice.com/archives/2011/01/d-links-wireles.php
"Wireless routers probably waste 99% of their energy
broadcasting their signal where your computers aren't,
which is why most routers have crappy range. D-Link is
introducing a new wireless repeater that doesn't just
boost signals, it targets them directly at your wireless
antennae for maximum distance and reliability.
D-Link's DAP-1525 Wi-Fi Booster is a mostly featureless
black object with a bunch of blinky blue lights on it,
a theme that seems to be quite common at this year's
Consumer Electronics Show. Plug the booster in somewhere
just in range of your router, and the DAP-1525 will pick
up the signal and blast it out again fresh, extending
your network into the wild blue yonder.
The booster isn't just transmitting wantonly, though:
using what D-Link is calling "SmartBeam Technology,"
it actually zeros in on the wireless devices that it's
talking to and uses one of six directional antennas to
focus the signal exactly where it needs to go. Since
the product is still being tested and tweaked, D-Link
won't say just how much of a difference this makes
beyond 'significant,' but it seems like a pretty good
idea to me. Look for the DAP-1525 this spring for a rather
spendy $140.
In addition to the repeater, D-Link also plans on coming
out with a couple routers that implement this SmartBeam
stuff, but not until the middle of next year at the earliest."
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IMHO - if this solves a lot of the transmit/receive issues
then I think D-Link will find plenty of folks willing to be
"spendy".