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Wirless PAN

Bluetooth

UWB

Wireless LAN

Wifi

Wireless MAN

WiMax

WiBro

Wireless WAN

2.5G

3G

4G

4G is a network of networks, it is a solution looking for a problem. Terminal has to accommodate converged radio networks. “The user wants to google cnn anytime, anywhere at the right cost having all security considered…” (IWS2005, summary of exec round table discussion on 4G)