eNodeB

It is the hardware that is connected to the mobile phone network that communicates directly wirelessly with mobile handsets (UEs), like a base transceiver station (BTS) in GSM networks.

This simplifies the architecture and allows lower response times.

eNB uses the E-UTRA protocols OFDMA (downlink) and SC-FDMA (uplink) on its LTE-Uu interface.

By contrast, NodeB uses the UTRA protocols WCDMA or TD-SCDMA on its Uu interface.

eNB embeds its own control functionality, rather than using a RNC (Radio Network Controller) as does a Node B. eNB interfaces with the System Architecture Evolution (SAE) core (also known as Evolved Packet Core (EPC)) and other eNB as follows:[1]