??IT????????????й??????д???????VoLTE???????????GSM??ν?????????FDD LTE???磬????й????????FDD LTE???????????????????????TD-LTE????
??????й?????????????μ??????????????????????????????????????????
LTE????3GPP??????????????4G?????????FDD??TDD????????LTE????е?FDD??TD??????????????С???????????90%??
FDD????????????ü???????????????????????FDD?????????????LTE???FDD-LTE???????????????????????ε?????????????????????????FDD-LTE?????????????TD-LTE??FDD-LTE????????????????????????????????????????4G?????