In LTE (Long Term Evolution), PDN stands for Packet Data Network. It enables internet data communication services for User Equipment (UE), such as smartphones and tablets, allowing access to a wide range of internet-based services like web browsing, email, video streaming, and VoIP (Voice over Internet Protocol).
Key Components of PDN Connectivity in LTE:
- PDN Gateway (P-GW): Acts as the interface between the LTE network and external packet data networks, responsible for IP address allocation, policy enforcement, and routing data packets.
- Serving Gateway (S-GW): Serves as the anchor point for data connections across eNodeBs, routing and forwarding user data packets.
- Mobility Management Entity (MME): Manages control-plane functions including signaling and security between the UE and the network, crucial for establishing and managing data bearers.