In public networks, what are the parts of a distributed cloud used for the 5G Core control plane. (Select 2)

The 5G Core architecture is designed for a distributed cloud environment, allowing network functions to be placed optimally. The control plane functions are typically split between two main locations. The Core/Central Cloud hosts functions that require a centralized, network-wide view, such as the Unified Data Management (UDM) and Policy Control Function (PCF). The Metro Edge Cloud (or regional cloud) is used to deploy control plane functions like the Access and Mobility Management Function (AMF) and Session Management Function (SMF). Placing them closer to the radio access network reduces signaling latency and improves responsiveness for session and mobility management within a specific geographic area.

C. Far Edge Cloud: This location is primarily used for deploying the User Plane Function (UPF) to achieve ultra-low latency for data traffic and support Multi-access Edge Computing (MEC), not for core control plane functions.
D. On-premise Edge Cloud: This is a specific type of far edge, located at an enterprise site. It is used for local data breakout via the UPF for enterprise-specific applications, not for hosting public network control plane elements.

1. Nokia White Paper, "The cloud native 5G core": This document explains the deployment flexibility of 5G Core network functions. It states, "...control plane functions such as the Access and Mobility Management Function (AMF) and Session Management Function (SMF) can be deployed in regional data centers [Metro Edge Cloud]. Other functions, such as the Unified Data Management (UDM), can remain in a central data center [Core/Central Cloud]." (Specific deployment strategy section).

2. Nokia Solution Brief, "Nokia 5G Core": This document outlines the architecture and benefits of a distributed 5G Core. It details how control plane and user plane functions can be separated and distributed, with control functions residing in central and regional sites for efficiency and resilience, while the user plane can be pushed to the far edge. (Refer to sections on Cloud-native architecture and Distributed deployment).

3. 3GPP TS 23.501, "System architecture for the 5G System (5GS)": While not a Nokia-specific document, it is the foundational standard for the 5G architecture. Section 4.2, "Architectural Principles," describes the separation of User Plane and Control Plane functions, which enables flexible deployment across a distributed cloud infrastructure, aligning with the central and regional/metro placement for control plane elements.