How does LTE architecture work?

In the 4G architecture we are working with, base stations are invisible to the IP layer of terminals . When a terminal sends an IP packet, it sends it to the gateway that all base stations are connected to. Base stations only relay layer 2 packets between terminals and the gateway.

Abstract: The Mobile Network Architecture (MNA) is designed to provide a cohesive, consistent framework for the development of a new generation of mobile data communications systems .

A standard LTE system architecture consists of an Evolved UMTS Terrestrial Radio Access Network, more commonly known as E-UTRAN, and the System Architecture Evolution, also known as SAE . SAE’s main component is the Evolved Packet Core, also known as an EPC. The E-UTRAN is comprised of: User Equipment (UEs)