This query can have various answer one would be based on the nodes which is being changed or not changed like -
- Inter Cell (only cell is changed not the enodeB)
- Inter EnodeB (enode B is also changed in addition to (1))
- Inter MME (MME is also changed in addition to (2))
- Inter RAT (LTE to UMTS)
But more obvious answer here would be S1 based handover or X2 based handover for this question. When source and target eNodeB has direct link then X2 based handover is triggered else it would have S1 based handover. There are few variations of S1 handover like "S1 based handover without MME relocation", "S1 based handover with MME relocation".
Let me know if you are looking something different.