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单项选择题
A.Insert Subscriber data
B.Update Location answer
C.Modify bearer request
D.Create session Request
单项选择题
A.UE->eNodeB->SGW->PGW->PDN
B.UE->eNodeB->MME->PGW-PDN
C.UE->eNodeB->SGW->MME-PGW->PDN
D.UE->eNodeB->SGW->HSS->PGW->PDN