Introduction to evolved packet core

03 Nov 2009

This white paper provides a brief introduction to evolved packet core (EPC) — a new mobile core for LTE.

Herein, key concepts and functional elements-EPC gateways (Serving Gateway and Public Data Network Gateway), Mobility Management Entity (MME) and Policy and Charging Rules Function (PCRF)-are outlined, as well as key changes in LTE requirements imposed on the Evolved Packet Core, and the deployment challenges.

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