关于LTE系统内切换的描述，以下说法正确的是_______. | About the description of handover in LTE system, which statements are RIGHT? ______
A.同一基站的不同扇区之间的切换属于软切换 | Handover between cells from the same eNB is soft handover.
B.基于S1口的切换属于软切换。 | Handover via S1 interface is soft handover.
C.基于X2口的切换属于硬切换。 | Handover via X2 interface is hard handover.
D.不同基站的扇区之间的切换属于硬切换。 | Handover between cells from different eNB is hard handover.
正确答案是CD