RF Barrier
As you may have already read in various online high-tech rags about Meru Networks' new offering: RF Barrier. If not, here's a good one by Lisa Phifer: http://www.wi-fiplanet.com/news/article.php/3761666
What's missing from these articles is the technical details, which are nothing short of COOL! For example, the RF Barrier APs listen on their "internal" antenna, read in the MAC header (analyzing the source and destination MAC addresses), and then make a decision on whether or not this traffic is part of the internal (authorized) network. If it is, then it immediately begins transmission on its directional, externally-facing antenna to "talk over" the frame. The AP typically transmits a data frame (that's essentially just saying, "hello") to corrupt the original transmission on the exterior side of the building. By transmitting at the same time as the original transmission, additional airtime is not used. That makes RF Barrier a very good neighbor.
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