ITU: Beyond3G系统的互通 rvi applications New radio edia access syste.interface download channel DAB DVB Wireline IP based core network XDSL Cellular WLAN return channel GSM e e.g. GSM MT2000 UMTS ort range activityITU：Beyond 3G 系统的互通 : other entities Services and applications based core network IMT-2000 UMTS WLAN type Cellular GSM Wireline xDSL short range connectivity DAB DVB return channel e.g. GSM download channel New radio interface IP