How does the S1 interface support communication between the eNodeB and MME in LTE network architecture?
If you are interested in learning how the LTE network architecture works, you might have come across the terms eNodeB and MME. These are two key components of the evolved packet core (EPC), which is the core network of the LTE system. The eNodeB is the base station that provides radio access to the user equipment (UE), such as smartphones and tablets. The MME is the mobility management entity that controls the signaling and security functions for the UE. But how do these two elements communicate with each other? The answer is the S1 interface. In this article, you will learn what the S1 interface is, what it does, and how it supports communication between the eNodeB and MME in LTE network architecture.