In LTE architecture, core network includes Mobility Management Entity (MME), Serving Gateway (SGW), Packet Data Network Gateway (PDN GW) where as E-UTRAN has E-UTRAN NodeB (eNB).
Key Components of a LTE Network
The User Equipment (UE)
The E-UTRAN (The access network)
Evolved Packet Core (EPC) (The core network)
Protocol structure of User Plane
Protocol structure of Control Plane