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- Public Cloud Core Infrastructure. This includes all IaaS/PaaS functions that are provided by the Public Clouds 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 vertically integrated hardware resource set controlled by the PCC Infrastructure and connected to it by means of 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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- Compute Hardware. This includes Compute, Network, and Storage resources that support 3PE functions. Note that the PCEI Reference Architecture recognizes a model, where a 3rd Party provider 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 online gaming provider may wish to implement their services in locations that are geographically closer to the mobile online gaming subscribers, and uses use 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 3PE functions.
- 3rd Party Edge NFVI layer. These are the NFVI software and capabilities needed to support functionality such as the Multi-Access Edge Computing (MEC).
- 3rd Party Edge Functions. These are edge computing application functions including the Network Functions (NFVs, e.g. SD-WAN, vFW, vRouter) and the Processing Functions (e.g. CDN Cache, IoT Gateways, AI Inferencing Model).
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The PCEI Portal. An optional component of the PCEI Architecture responsible for providing the users of PCEI a way to express and communicate their intended functional, performance, and service requirements.
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P2' - Interface between PCEI and the MNO Core Functions such as UPF, SMF. In case of a UPF the P2' interface can be used to configure the the parameters responsible for interfacing the UPF and the virtual/contextual configuration structures within the UPF with the PCC/PCE and 3PE resources by way of the L1-L3 Interconnection layer. The P2' interface implies the availability of standard or well-specified UPF provisioning models provided by MNOs.
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