Page 249 - ITU-T Focus Group IMT-2020 Deliverables

ITU-T Focus Group IMT-2020 Deliverables 3

operator’s domain (e.g., multiple IMT-2020 access and core networks, Data Centers interconnected by a WAN
transport network, etc.).

Inter-layer Service Orchestration
The Inter-layer Service Orchestration (ISO) functional element provides orchestration of multi-layer resource
management. It coordinates management operations among application, control, and resource layers,
especially relationship among virtualized and physical resource across multi-layer scope. Some examples can
be: orchestration for a multi-layer virtual to physical resource fault correlation, orchestration for scale-in and
scale-out of control element (e.g., controller instances) depending on the traffic demand changes in the
underlying resource layer, and orchestration for an application layer service provisioning request to resource
layer relevant resources.

Slice Lifecycle Management Support
The Slice Lifecycle Management Support (SLMS) functional element provides support functionality of the
slice lifecycle management functional component (SLMFC). It communicates with SLMFC to receive requests
from SLMFC on specific management requests and respond with results of the requested management
operation. Examples of such operations are the current slice resource status, performance statistics, any fault
or security related events, and etc.

8.6 External Relationship Management Functional Component

This sub-clause describes detailed management functionality in the External Relationship Management
(ERM) functional component. Figure 12 shows its functional elements.

Figure 12 – External Relationship Management functional components

The External Relationship Management provides management functionality to interwork with external
management entities. External management entities can be a 2G/3G/LTE OSS/BSS, MANO, cloud
management entities, or other management functionality which can be defined in the future. The ERM plays
a role of the representative interface of IMT-2020 management toward the external management entities
and IMT-2020 management planes in other IMT-2020 domains. Its main functionality includes abstraction of
IMT-2020 management information for the exchange and request/reply of management operations with
external management entities. It can be used for external IMT-2020 policy management, data analytics,
charging, etc.

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