Reasons for DFS Requirement in Europe Month 1998 doc.: IEEE 802.11-98/xxx July 2001 Reasons for DFS Requirement in Europe Mika Kasslin, Nokia Mika Kasslin, Nokia John Doe, His Company

Discussions in the 5 GHz band Month 1998 doc.: IEEE 802.11-98/xxx July 2001 Discussions in the 5 GHz band 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 MHz Aeron.radionav. FSS Radioloc. EESS Space sc. Marit.radionav. Meterologic.radars FSS E-to-S RTTT FS MS ISM RLAN, 200 mW, indoor RLAN, 1W, outdoor General SRD, 25 mW Existing prim.allocations Current license-exempt bands in Europe Current license-exempt bands in the US U-NII 250mW U-NII 50mW Current license-exempt bands in Japan U-NII 200mW Mika Kasslin, Nokia John Doe, His Company

Reasons for DFS requirement in Europe Month 1998 doc.: IEEE 802.11-98/xxx July 2001 Reasons for DFS requirement in Europe Equipment shall employ a DFS mechanism to detect interference from other systems and therefore is able to avoid co-channel operation with other systems, notably radar systems DFS wil also be required to provide a spread of the loading across a minimum of 14 channels to further facilitate sharing with satellite services The only implied technical requirement is that DFS Must be able to detect Radars and change channel accordingly Satellite sharing is fasilitated as a ”side effect” Mika Kasslin, Nokia John Doe, His Company