??

2018070514:49  ?-?
 

??????

75? ??????ȧ???3???????20Mbps30Mbps?50%

????

???????????????

?3?????????3??????????0?0?

?????

????????s??????+??????????

?????NBIOTk????NBIOT????????????? ????

???????NB-IOT???85%??NB-IOT?????L???

(????)