What is the difference between EPS and EPC in LTE | EPS vs EPC

This page compares LTE EPS vs EPC and mentions functional difference between EPS and EPC in LTE system.

Introduction: 4G (4th Generation) LTE (Long Term Evolution) has been introduced first with 3GPP release-8. It has evolved further with release-15 and above to add many more features in the initial release. 4G network consists of radio functionality part and core functionality part. Radio function is based on LTE 3GPP standards and core network is based on EPC 3GPP standards.

EPS vs EPC, Difference between EPS and EPC

➨EPS stands for Evolved Packet System where as EPC stands for Evolved Packet Core.
➨EPS is combination of E-UTRAN, EPC and UE. UE (User Equipment) refers to any device controlled by the user such as mobile subscriber, tablet, laptop, USB dongle etc. The figure depicts EPS architecture in which UE is connected with EPC over E-UTRAN network. Evolved node-B (i.e. eNodeB) is the base station of LTE radio system.
➨EPS architecture consists of User Equipment (UE), radio network (E-UTRAN), core network (EPC) and IP network (IMS).
➨EPC consists of SGW (Serving gateway) , PGW (Packet data network gateway), MME (Mobility Management Entity) and HSS (Home Subscriber Station) . It is connected with external networks such as IMS (IP Multimedia Core Network Subsystem).


Difference between SC-FDMA and OFDMA   LTE Cyclic Delay Diversity   LTE eNodeB Physical Layer Measurements   LTE EPC Network Inerfaces   LTE UE Physical Layer Measurements   LTE Bearer types   LTE UE Event Measurement Reporting   LTE RSRP vs RSRQ   LTE Signalling radio bearers  LTE QoS  LTE EPS mobility management states  LTE EPS connection management states  LTE UE cell selection  LTE UE PLMN selection  LTE UE Paging Procedure  LTE CQI vs PMI vs RI  LTE RNTI vs GUTI  LTE Security Basics  LTE Drive Tests and LTE drive test scanner 

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