????6??12?????????????????????(MAE)???й????Я?????KT????????VoLTE?????????????????ζVoLTE?????y??????????????

???????????????????????????VoLTE???????TD-LTE??LTE FDD?????????????????????????VoLTE??2G??????????????л? (??eSRVCC)????TD-LTE??VoLTE???????????????????????????????KT???й????VoLTE????????KT VoLTE???????????????????????????????IMS???μ?????η???????????????

??????????й????????????3?????KT???????????????VoLTE???θ???????????????????????????VoLTE???????????????????????????????????????????4G????????η?????????????????SCFA??????????????￡??????????ι???????????LTE?????????????μ?VoLTE????????????2??25?????????????4G??????????Σ??VoLTE???????ε???????????????????????????????????????TD-LTE??????????????

????????????????й????????6??/??????8???????????4G??????????η?????????15??????????4G??????????β???????????????????????4G??/???????4G???Ρ?