Page 180 - 5G Basics - Core Network Aspects

1 Core network aspects

7.4.1 Resource layer management functional component

The RLM functional component is responsible for the management of physical and/or virtual resources in the
SDN-RL. The RLM functional component provides capabilities for discovering and activation of virtual and
physical resources to make them ready for operation. The RLM functional component includes support for
FCAPS and SDN-RL orchestration (e.g., coordinated resource reconfiguration) that is provided by the MMO
functional component. The MMO functional component provides the capabilities for provisioning of SDN-RL
resources and the RLM functional component keeps track of the overall state of allocated and available
resources in the SDN-RL.
The RLM functional component is also responsible for managing the configuration relationship between
virtual and physical resources (e.g., interface ID mapping between virtual and physical resources),
performance correlation between virtual and physical resources, and faults by considering the relationship
between virtual and physical resources, and finally isolation and control of any anomaly concerning SDN
network resources, as well as authentication and authorization of the network resources.
By providing the overall resource status information monitored as an input to the RLM functional component,
energy efficient resource management capability and other management capabilities can be realized by e.g.,
turning off of unused resources.

7.4.2 Control layer management functional component
The CLM functional component includes management of resources used to deploy SDN-CL functions
(hardware, software platforms, links connecting control plane with other planes) in order to ensure high
availability and scalability of the SDN-CL, performance, fault and security management of control traffic
generated between SDN-CL entities and SDN-RL or SDN-AL entities. It can activate SDN-CL entities or their
components, monitor performance of SDN-CL entities in terms of reliability, utilization, detection, root cause
analysis, and correction of faults of the SDN-CL: detection, isolation, and control of SDN-CL related traffic and
authentication and authorization management functionality of SDN-CL entities. Policy management can
include business, technical, security, privacy and certification policies that apply to CL services and their usage
by SDN applications.

The CLM functional component can also provide energy-aware CL resource management. Mechanisms used
by the RL energy-aware resource management can be applied in the CL as well.

7.4.3 Application layer management functional component
The ALM functional component provides management functionality for managing SDN-AL resources covering
FCAPS management for these SDN-AL resources. It is also involved in cross-layer orchestration driven by the
SDN-AL.
The ALM functional component provides SDN applications' code repository management, SDN applications'
lifecycle management (creation, modification, and deletion of SDN applications), performance monitoring of
SDN applications to meet the SLA requirements, detection, isolation, recovery of SDN application faults and
security management of 3rd party SDN applications (authentication, identity management).

7.4.4 Multi-layer management orchestration functional component
The MMO functional component supports functionalities for the lifecycle management of SDN
application/network services across the entire SDN operator's domain and orchestrates multi-layer resource
management. It coordinates management operations among the SDN-AL, SDN-CL, and SDN-RL, especially the
relationship among virtualized and physical resources across these SDN layers.
7.4.5 External relationship management functional component

The ERM functional component provides management functionality to interwork with external management
entities. The ERM functional component plays a role of the representative interface of SDN management
toward the external management entities. Its main functionality includes abstraction of SDN management
information, request and reply of management operations with external management entities, policy
management, data analytics, accounting and development operations (DevOps) operations.

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