说明：  Mobile_Broadband_Evolution_–_LTE_and_EPC
(Long Term Evolution (LTE) 􀂾 3GPP (Third Generation Partnership Project) work item known as LTE • Evolution of GSM/GPRS, WCDMA/HSPA radio networks 􀂾 LTE strictly refers to air interface, often entire technology (including core network) loosely referred to as LTE (or LTE/SAE) • Evolved Packet Core (EPC) 􀂾 Outcome of 3GPP work item-System Architecture Evolution (SAE) • Evolve GPRS and HSPA packet core networks to an all-IP based core • Other terms 􀂾 Evolved UTRAN (E-UTRAN) • Radio access network is referred to as E-UTRAN 􀂾 Evolved Packet System (EPS) • End-to-end system including LTE terminals, E-UTRAN, and Core network)