UMA provides tunneled IP connection to GSM/GPRS services through WiFi frequencies. But it needs dual mode mobile, to support roaming between wireless networks and unlicensed WiFi networks. UMA Network controller (UNC) is critical network node interworking between tunneled WiFi connection and cellular network.
Picture is referenced from book by Harri Holma and Antti Toskala
Picture is referenced from book by Harri Holma and Antti Toskala
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