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eNodeB Architecture

eNodeB Functionality:

• Radio Resource Control
– Allocation and control of radio bearers
– Dynamic radio resource management and packet scheduling
• Radio Mobility Management
– Measurement reporting and Handover control
• Layer 2
– Header compression, encryption and integrity check
• Layer 1
– Modulation and Coding, RF transmission / reception

Since there is no RNC, the eNodeB has inherited some of the functionality of the other stations in the Access Network.
Overall management of the radio bearers is performed by the MME, but the implementation is achieved at the eNodeB
Broadcast of System Information and Paging messages is also included in RRC
Layer 2 also includes the usual acknowledgement protocols to ensure reliable transfer of higher layer messaging.