S1 and X2 Handover Call Flows

LTE X2 Handover Sequence Diagrams

X2 interface connects eNodeBs in LTE. Explore the inter eNodeB handover procedures over the X2 interface.

LTE S1 Handover Sequence Diagrams

S1 interface connects eNodeBs to the MME. S1 handover is used when the direct X2 interface is not available.

LTE S1AP View of an Inter-MME S1 Handover

Examine the S1AP messages involved in an S1 Handover at full message level detail. In this scenario, the source and target eNodeBs are served by different MMEs.

X2 Handover Messaging Presentation

Explore contents of messages exchanged during an X2 handover between two eNodeBs.