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Theconceptofwirelessnetworkwasintro ducedaround 1 980 [1,2 ] ,IEEE 80 2 .1 1forWirelessLocalAreaNetwork (WLAN )was publishedinJune 1 997[3] .Nowavarietyofwirelesstechnolo giesandproductshavebeendeveloped ,theyarebe comingtheviablecomplementarysolutionstowirednetworks[1] ,suchasLANextension ,inter LANbridges,ad hocnetworking ,nomadicaccess,etc..Moreover,wirelessalsoproducesavarietyofnewapplications,suchasmobileeducation ,computing ,bankingandsoon .Anewmobilecommerceisforthcoming .Thebig… 相似文献
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