LTE/EPC网络中用户平面数据流路径是

LTE/EPC网络中用户平面数据流路径是

A.U>eNode>SGW->PGW->PDN

B.U>eNode>MM>PGW-PDN

C.U>eNode>SGW->MMPGW->PDN

D.U>eNode>SGW->HSS->PGW->PDN

正确答案是A