It is the only network element defined as part of EUTRAN.
•It replaces the old Node B / RNC combination from 3G.
•It terminates the complete radio interface including physical layer.
•It provides all radio management functions
•An eNB can handle several cells.
•To enable efficient inter-cell radio management for cells not attached to the same eNB, there is a inter-eNB interface X2 specified. It will allow to coordinate inter-eNB handovers without direct involvement of EPC during this process.