Dynamic Frequency Selection and Transmitter Power Control with 801.11hadjacent cell interference, allowing for more densely deployed high-performance WLANs. As a secondary benefit, the lower power on the client provides longer battery life because less power is used by the radio.In 2004, the FCC opened up the frequencies between 5.470 and 5.725 GHz, provided that DFS and TPS are implemented properly. This now provides up to 23 nonoverlapping channels in the North American regulatory domain, making 5 GHz a much more scalable solution.Because of the long lead time in development of silicon devices used in WLAN radio devices, DFS and TPC features only started to be incorporated into 802.11a devices in 2004. The Wi-Fi alliance has plans to offer interoperability testing of these two features at some point, but the timeframes have not yet been defined. |
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