User's Manual

Confidential

Chapter 3 System Structure

LTE eNB System Description v2.0 41

 X2 interfacing

eNB Common Management Block (ECMB)

The ECMB performs call processing function such as the system information

transmission and eNB overload control for each eNB and cell. It operates on the

master OAM board.

The major functions of ECMB are as follows:

 Setting/Releasing cell

 Transmitting system information

 eNB overload control

 Access barring control

 Resource measurement control

 Transmission of cell load information

eNB Call Control Block (ECCB)

The ECCB performs the function to control the call procedure until exit after call

setup and call processing function for MME and neighbor eNBs. It operates on the

master OAM board.

The major functions of ECCB are as follows:

 Radio resource management

 Idle to Active status transition

 Setting/changing/releasing bearer

 Paging Functions

 MME selection/load balancing

 Call admission control

 Security function

 Handover control

 UE measurement control

 Statistics processing

 Call processing function related to the SON (Mobility Robustness, RACH

optimization)

eNB MBMS Control Block (EMCB)

The EMCB performs the function to control call procedure related to eMBMS and

process call with MME or neighbour eNB.

The major functions of EMCB are as follows: