ePDG - Evolved Packet Data Gateway
Mobile operators usually see Wi-Fi as a relief for internet access. However, as they grow their data service portfolio, including voice, messaging, security (parental control and anti-malware inclusive), and secure CRM-protected video delivery which are mostly delivered from their service LANs over cellular radio access networks (RANs), they must look to extend the delivery of services over other access networks, including Wi-Fi.
Further, we will discuss the following topics:
Wireless communications systems are widely deployed to provide various communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be multiple-access systems capable of supporting communication with multiple users by sharing the available system resources such as time, frequency, and power.
A wireless network, such as a wireless local area network (WLAN), or another network operating in an unlicensed radio frequency spectrum such as MulteFire (like operating based on the Long Term Evolution (LTE) technology in an unlicensed spectrum) may include an access point (AP) that may communicate with mobile devices or stations (STAs). The AP may be coupled to a network, such as the Internet, and may enable a mobile device to communicate via the network (or communicate with other devices coupled to the access point).
A wireless device may communicate with a network device bi-directionally. For example, in a WLAN, a station or mobile device may communicate with an associated AP via downlink (DL) and uplink (UL). The DL (or forward link) may refer to the communication link from the AP to the station, and the UL (or reverse link) may refer to the communication link from the station to the AP.
The ePDG, in this case, provides access to PS domain services to WLAN UEs. For interaction with the LTE EPC (Evolved Packet Core), an ePDG (Evolved PDG) may be applied. General responsibilities include IP address management, support for MIP (Mobile IP), Quality of Service (QoS) enforcement, lawful intercept, and security.
Characteristics and Features of ePDG
Benefits of ePDG
In conclusion, the ePDG offers certain capabilities and functionalities as highlighted below: