A.BSSGP B.SNDCP C.GTP D.GTP’
A.LA B.RA C.Cell D.PLMN
A.HLR發(fā)起的Detach B.MS發(fā)起的Detach C.Network發(fā)起的Detach D.WAP網(wǎng)關(guān)發(fā)起的去激活