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- Compute Hardware. This includes Compute, Network and Storage resources that support MNO functions. Note that the PCEI Reference Architecture recognizes a model, where an MNO has the ability to distribute the compute infrastructure in appropriate locations in the DCF Domain in order to satisfy performance and functional requirements for the targeted application use cases. For example, an MNO may wish to implement a Local Break-Out (LBO) in locations that are geographically closer to the mobile subscribers , and uses compute hardware provided by a qualified Bare Metal service provider.
- The PCEI Architecture further recognizes a model, where the Compute Hardware layer is accessible via the Bare Metal Orchestrator that enables dynamic instantiation of compute/network resources for the MNO functions.
- Network Function Virtualization Infrastructure (NFVI). This is the virtualization layer (e.g. OpenStack, Kubernetes) that may be specific to MNO requirements and provides the ability to support MNO functions such as the 5GC User Plane Function (UPF).
- MNO Core Functions. This layer corresponds to the key MNO Core functions applicable to the PCEI. These functions include (but not limited to): UPF, SMF and other applicable 4G vEPC and 5G Core functions.
- MNO Orchestration Functions. These functions are responsible for communicating the MNO service/performance requirements to the PCEI Enabler and for orchestrating services within the MNO Domain. Examples of these functions include NSSF, NRF, etc.
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- Public Cloud Core Infrastructure. This includes all IaaS/PaaS functions that are provided by the Public cloud to their customers. These include Virtual Private Cloud and Public/Private Networking capabilities.
- Public Cloud Edge Compute Hardware. This is Compute, Network, and Storage resources that support PCE functions. The PCE compute hardware is usually a vertically integrated hardware resource set controlled by the PCC Infrastructure and connected to it by means of the L1-L3 Interconnection layer.
- Public Cloud NFVI. This is the virtualization layer specific to the Public Cloud service provider.
- Public Cloud Core Functions. These functions are the specific capabilities offered by the Public Cloud service provider to its customers. Examples include Virtual Public Cloud (and equivalents), Virtual and Physical Private Networking.
- Public Cloud Edge Functions. A set of Public Cloud resources executing on PCE hardware and controlled by the PCC functions.
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