name: SAE
full_form: System Architecture Evolution
context: flow detour. Figure 5.1.3-1: Voice flow detour if SBC is not adjacent to SAE GW Figure 5.1.3-2: No voice flow detour if SBC is adjacent to SAE GW Instance2: For EPC network, there is the similar requirement that the SAE GW should be adjacent to some content resource (e.g. CDN cache point). When the CDN cache is in the edge DC, the virtualized SAE GW should not be allowed to be deployed in the core DC, when the CDN cache is in the core DC, the virtualized SAE GW is better to be deployed in the core DC. The assumptions are (for Instance1): 1) The operator has two types' DCs, core DCs are centralized in some individual region and edge DCs are distributed in most cities. 2) The operator need deploy IMS network in one region and the EPC network has already been running.
description: The System Architecture Evolution (SAE) Gateway manages traffic flow and efficiently routes data packets within the Evolved Packet Core (EPC) network. It determines the optimal path for voice and data transmission, connecting with Session Border Controllers (SBCs) and Content Delivery Network (CDN) cache points.
explanation: The text describes the SAE Gateway's role in controlling and directing data flow within the EPC network, aligning with the definition of a Network Function.
section_title: 5.1.3.1Introduction and assumption
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