System Architecture Evolution (aka 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 WiMAX or cdma2000)
Read more about System Architecture Evolution: SAE Architecture, Non Access Stratum (NAS) Protocols, Support of Voice Services and SMS, Multiple Access Networks, 3GPP Releases, Reading
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