Evolving the Evolved Packet Core The document discusses the evolution of mobile networks from 2G and 3G to 4G LTE networks and the Evolved Packet Core (EPC). It notes the explosive growth in mobile data and video traffic driven by powerful consumer devices and new applications. This is driving a migration to an all-IP, distributed network architecture using heterogeneous networks of macrocells, microcells, picocells and femtocells. Next-generation base stations and the EPC must support this architecture and evolution to efficiently handle the computational complexities of 4G technologies and explosive mobile data growth.