A.路由手机到GGSN的数据包
B.Charging
C.Measurement
D.Ip allocation

A.MS
B.SGSN
C.GGSN
D.HLR

A.Activate PDP Context Accept
B.Activate PDP Context Reject
C.Create PDP Context Response
D.Deactivae PDP Context Accept

A.MS---SGSN
B.SGSN---GGSN
C.SGSN---HLR
D.GGSN---DNS

A.MS---SGSN
B.SGSN---HLR
C.SGSN---GGSN
D.SGSN---MSC

A.Cell update
B.RA update
C.Combined RA/LA update
D.Cancel Lacation

A.Gr
B.Gs
C.Gb
D.Gi

A.PDP Context Deactivation
B.Detach
C.Cell update
D.RA update

A.Standby
B.Ready
C.Active
D.Idle

A.SGSN
B.HLR
C.GGSN
D.DNS

A.Active
B.Standby
C.Ready
D.Idle