The Evolved Packet Data Gateway (ePDG) enables operators to integrate their 4G Long Term Evolution (LTE) and untrusted access networks that require security, such as WiFi.
VoWiFi stands for voice over (Evolved Packet Core-integrated) WiFi and is a complementary technology to VoLTE. It utilizes IMS technology to provide a packet voice service that is delivered over IP via a WiFi network.
Inter RAT Handover (Target) Handover from an E-UTRAN to a different RAT. The procedure for when a UE is entering the E-UTRAN cell. Intra eNB Handover (Source) Handover from one sector to another managed by the same eNB or the Internet WiFi network.
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