单项选择题
A.S-GW侧 B.MME侧 C.eNodeB侧 D.UE侧
A.2 B.2.4 C.2.8 D.3.2
A.MME;MME;UE B.MME;eNodeB;UE C.UE;eNodeB;UE D.UE;MME;MME