3GPP SAE, also known as 3G SAE (System Architecture Evolution), is a project undertaken by 3GPP to develop a new core network architecture for UMTS. This initiative aims to achieve cost-effective deployment and operational efficiency, making it suitable for widespread use of IP services. It also seeks to enhance the integration of various access technologies within the network.
The primary objectives driving this network evolution are as follows:
- Meeting the requirements for the advancement of the radio interface, including LTE (Long-Term Evolution).
- Simplifying the network architecture for increased efficiency.
- Facilitating the transition toward an All-IP Network where all services operate via packet-switching, eliminating circuit switching.
- Supporting seamless mobility and service continuity across diverse access networks, including 2G/3G, LTE, and non-3GPP access systems such as WiFi and WiMAX.
3G SAE serves as a framework for a high-data-rate, low-latency, packet-oriented system designed to accommodate multiple radio access technologies, with a particular emphasis on packet-switching and the support of voice services like VoIP (Voice over IP).