Page 126 - ITU-T Focus Group IMT-2020 Deliverables

3 ITU-T Focus Group IMT-2020 Deliverables

Network

Comprises
Application
Network
Slice
Uses
Network Utilizes Network
Resource Service
Implements

Network Network Service
Equipment Topology logRecord Connectivity policy

Storage Computing Link Node alarmRecord Primary Backup

Link sliceFaultAlarmRecord
Caching Data
Connection Network Path
Function Connection Caching Security
Devices
Management Control
Function Function
Transpo Access Mobility Routing
rt
Fault Management Transport Service
Function Function Function
UE

Figure 6.3.4-4 – An example of the slice entities

6.3.4.3 5G Network slicing: Services, Resources and Functions
5G slices are comprised of services, resources and related control/mgmt functions. For a given application
scenario, the slices are dynamically created and maintained. Based on the context of the service
control/mgmt scope, the slices can be established and managed via a hieratical approach or a federation
approach, or a hybrid of the both. Fig 5 is an example of 5G slice engineering model which shows a layered
view of end-to-end slices for two video conferencing applications. These applications are multi-party (i.e.,
multi-source and multi-destination, MS/MD), real-time and interactive, and mobile, over a 5G network
connectivity including radio interface, front haul, back haul, MEC access, video service access point, and
IP/MPLS/Optical transport backbone network. This example shows the layered slices with a hybrid model of
hieratical and federation among slices, based on their context-oriented relationships such as connectivity
dependency, geographical topology, mgmt ownership scope, temporal order of the service logics, and the
service delivery and demarcation functions, etc.

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