name: GW
full_form: Gateway
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: A Gateway (GW) is a Network Function that serves as an entry and exit point for data traffic between different networks or systems, enabling communication and data exchange between them.
explanation: The text explicitly states that the Gateway is a 'Network Function' and describes its role in managing data flow between networks.
section_title: 5.1.3.1Introduction and assumption
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