Page 252 - ITU-T Focus Group IMT-2020 Deliverables

3 ITU-T Focus Group IMT-2020 Deliverables

• SRMA performs collection, monitoring, and analysis tasks of the provisioned slice resources. Data
and information collected and analyzed are then store in SRR for further processing by other
functional elements.
• When SRR receives any resource status updates, it stores in the repository and, at the same time, it
emits notification to all functional elements who are listening to the status updates. In this case, it
sends its update notification to Slice Fault Management (SFM), Slice Security Management (SSM),
Slice Charging Management (SCM), and SCPO.

• When SCPO receives the notification, it updates available resource status and determine if re-
optimization is needed upon status updates. Also SF/S/CM receive the notification, they perform
fault, security, & charging management of the provisioned slices and their resources and determines
any control or re-provisioning actions are required. If so, they request to SP for provisioning update
processes.

• SP, by receiving the provisioning update requests, performs re-provisioning tasks for the provisioned
slices. When re-provisioning tasks are done, SP generates provision status to SRR and SRR further
conveys the notification to SF/S/CM, SCPO and IMT-2020 slice customer for resource status updates.

9.2 IMT-2020 Management Implementation Scenarios

9.2.1 eNMS Architecture for IMT-2020 network management
Technologies for implementing new network functions and deploying new networks using them are the
fundamental building blocks for IMT-2020, but brand-new network management technologies should be
supported with the same importance to make the new networking technology working properly. In order to
manage the highly flexible and scalable IMT-2020 networks, traditional network management architecture
needs to be enhanced fundamentally.
IMT-2020 heavily relies on the virtualization technologies to acquire the flexibility and scalability. It will use
a lot of virtual resources along with the mixed connections among virtual and physical resources. Efficient
management of virtual resources will become one of the most challenging goals for IMT-2020 NMS.
Because of the special type of services, mostly requiring low latency, many network functions are moving
down to the edge networks. The network functions at the edge need to be managed locally to meet the
requirements.

We have investigated IMT-2020 service categories to derive the fundamental requirements for IMT-2020
network management and the results of the investigations have been published on ITU-T library. Based on
the insights from the above investigations, a conceptual IMT-2020 network management architecture that is
scalable and flexible is considered.
The IMT-2020 service scenarios have been investigated to obtain the requirements for IMT-2020 network
management. The service scenarios are categories into three groups according to most IMT-2020 related
documents, including ITU-T. We have derived three fundamental requirements for the three service
categories:
• eMBB (enhanced Mobile BroadBand)

• Multiple high-speed connections maintained in a flexible way  Scalability
• mMTC (massive Machine Type Communication)
• Numerous devices, connections and conjunction points  Recursive
• URLL (Ultra Reliable and Low Latency Communications)

Network functions moved down near to user  Decentralized
This Recommendation describes following Architecture for IMT-2020 network management, called eNMS
(enhanced NMS), according to the above requirements.

246