Page 125 - ITU-T Focus Group IMT-2020 Deliverables

ITU-T Focus Group IMT-2020 Deliverables 3

Figure 6.3.4-3 – 3GPP network slicing architecture

6.3.4.2 5G Network Slice Informational Entities
Network slice informational entities are represented by object classes. Each class can have a set of attributes
and a set of operations to manipulate the attributes. The controller and NMS can access and manipulate the
same object with different operations. Open APIs can be defined between the controller, NMS manager and
the service/resource entities. It’s an implementation matter whether the controller and NMS should be
separated or integrated.
An information model can be used to describe 5G slice entities and their relationships. Figure 6.3.4-4 is an
example of showing the resource, service and functional entities of network slices. As an example, a network
resource can comprise network equipment, network topology, log record and etc. The network resource tree
can be expanded and deeper with sub resources as shown in Figure 6.3.4-4. For example, the logRecord can
comprise alarmRecord, which may comprise sliceFaultAlarmRecord for slice fault management. This
logRecord object and its subresource alarmRecord object are referred from the management information
model defined in ITU X.720. Note that all those examples are for illustrative purpose only. Figure 6.3.4-4 is
neither complete nor accurate.

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