LTE employs a new network architecture made up of multiple Evolved Packet Cores (EPCs) that communicate with each other and with evolved universal terrestrial radio access network base stations (eNBs). Each EPC contains a Mobile Management Entity (MME) and a System Architecture Evolution Gateway (SAE). The eNB stations communicate with the EPCs, with each other, and with user equipment (UE).
Click Downlink in the tree view to open the Downlink node. The Downlink node enables you to set parameters of the cell, reference signal, and synchronization signals.
Click the Predefined Configuration button 
to access a dialog box
from which you can select a base channel configuration.
To set up a fixed reference channel (FRC), click the 
button to open the DL FRC
Wizard.