IEEE 802.11h-2003

IEEE 802.11h is the "harmonization" of standards for European 802.11a WLAN applications. In contrast to the original 11 sets the expansion to 11h skills DFS (Dynamic Frequency Selection, Dynamic frequency selection procedure) and TPC (transmission power control, transmission, transmission power control) advance to other services in the 5 GHz band such as military radar systems and satellite and radio- do not bother.

802.11a WLANs with the extension 802.11h transmit in the 5 GHz band and achieve a data rate of 54 Mbit / s gross.

802.11a / h in Germany

Meanwhile, one may WLAN 802.11a with 802.11h extension in Germany both within, and outside of closed rooms build. The currently valid general allocation of the Federal Network Agency can be found at the end of this article and replaced one of the regulatory authority by the end of 2002. Within enclosed spaces, therefore, is the band from 5.15 to 5.25 GHz for up to 200 mW and from 5.25 to 5, 35 GHz with 200 mW ( with DFS, TPC) and 5.47-5.725 GHz for up to 1000 mW equivalent isotropic radiated power ( EIRP) ( DFS and TPC) enabled. Only the frequency range from 5.470 to 5.725 is released for license-free operation of wireless networks outside of enclosed areas.

As part of a revision of the relevant ETSI Standard EN 301 893 regulations will be from January 1, 2006 with respect to 802.11h regulated uniformly across Europe with and without TPC or DFS.