S1AP View of Inter MME S1 Handover in LTE

Here we look at the S1 handover that involves an MME change. The S1 handover is analyzed at the S1AP interface. S1AP messages involved in S1 handover are shown just before the message. The messages show a high level structure of the complex messages involved in the interaction.

S1 handover flow

Additionally, you can click on any S1AP message to see the complete field level details like the one shown below.

eNB Status Transfer message