System Architecture Evolution (SAE) is the network architecture and designed to simplify the network to other IP based communications network. SAE uses an eNB and Access Gateway (aGW) and removes the RNC and SGSN from the equivalent 3G network architecture, to make a simpler mobile network. This allows the network to be built as an “All-IP” based network architecture. SAE also includes entities to allow full inter-working with other related wireless technology (WCDMA, WiMAX, WLAN, etc.). These entities can specifically manage and permit the non-3GPP technologies to interface directly into the network and be managed from within the same network.