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Core network aspects 1

A.1.9 Application layer accounting management functional element

The AL accounting management functional element is responsible for accounting management of the SDN-
AL. It provides capabilities for metering and reporting SDN applications and relevant SDN-AL resource usage
data for further accounting. Resource usage data can be metered per SDN application or per end-
user/customer.

A.1.10 Application layer multi-layer orchestration support functional element
The AL multi-layer orchestration support functional element provides an internal interface to the multi-layer
orchestration support functional element in the MMO functional component for requesting and receiving
management operations and associated information for multi-layer orchestration specific to application layer
management.

A.2 Control layer management functional component
Figure A.2 shows the functional elements of the CLM functional component.

Figure A.2 – Functional elements of the CLM functional component

A.2.1 Control layer support functional element
The CL support functional element provides an MMC reference point to the CL-MSO functional component
(see clause 7.2.2) which is used for requesting and receiving management operations and associated
information to/from the SDN-CL.
A.2.2 Control layer resource discovery functional element

The CL resource discovery functional element is responsible for discovering control resources in the SDN-CL.
It provides capabilities for:
– discovering control resources in the SDN-CL. The discovered resources are stored in the CL resource
repository functional element.

A.2.3 Control layer resource repository functional element
The CL resource repository functional element is responsible for storing the contents discovered by the
resource discovery and bootstrapping and managing the lifecycle of the contents in the repository. It provides
capabilities for:

– storing and providing APIs for querying the contents discovered by the CL resource discovery
functional element;

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