System Architecture Evolution(SAE)

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System Architecture Evolution (aka SAE) is the core network architecture of 3GPP's future LTE wireless communication standard.
SAE is the evolution of the GPRS Core Network, with some differences.
The main principles and objectives of the LTE-SAE architecture include :
A common anchor point and gateway (GW) node for all access technologies
IP-based protocols on all interfaces;
Simplified network architecture
All IP network
All services are via Packet Switched domain
Support mobility between heterogeneous RATs, including legacy systems as GPRS, but also non-3GPP systems (say WiMAX)

Support for multiple, heterogeneous RATs, including legacy systems as GPRS, but also non-3GPP systems (say WiMAX)


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