ePDG (untrusted non-3GPP access) in 4G Network
ePDG stands for "Evolved Packet Data Gateway". It is a key network element in the 3GPP architecture.
The ePDG provides secure access to the 4G core network (EPC), for user equipment (UEs) connected to untrusted non-3GPP access networks, such as Wi-Fi or public internet.
It is responsible for authenticating the UE and authorizing its access to the EPC.
In addition, it handles the mobility management for UEs, and manages the IP address allocation, session establishment, and session continuity during UE mobility.
The ePDG receives the user's IP traffic from the untrusted non-3GPP access network and forwards it to the appropriate PGW (PDN Gateway) in the EPC, and vice versa.
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LTE (4G) Network Architecture
LTE (4G) Network Nodes LTE refers to 'Long Term Evolution', and the architecture of the LTE (4G) network is as following, eNodeB The eNodeB is the 4G site that the UE connects to. It provides the radio interface to the UE. MME MME refers to 'Mobility Management Entity'. The MME is responsible for authenticating the…
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Your Guide to Mobile Network Technologies, GSM/GPRS/UMTS/LTE
Mobile network technologies has evolved over time to satisfy the increasing customer needs for higher data rates and better services. In brief, the Mobile Station you are having should be able to make voice calls, in addition to data sessions. The voice calls in the mobile network are using the Circuit Switching 'CS' domain. While…
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