SAE

System Architecture Evolution

System Architecture Evolution (SAE) is the core network architecture of 3GPP's LTE wireless communication standard.

SAE is the evolution of the GPRS Core Network, with some differences:

• simplified architecture

• all-IP Network (AIPN)

• support for higher throughput and lower latency radio access networks (RANs)

• support for, and mobility between, multiple heterogeneous access networks, including E-UTRA (LTE and LTE Advanced air interface), 3GPP legacy systems (for example GERAN or UTRAN, air interfaces of GPRS and UMTS respectively), but also non-3GPP systems (for example WiFi, WiMAX or cdma2000)