Page 96 - ITU-T Focus Group IMT-2020 Deliverables

3 ITU-T Focus Group IMT-2020 Deliverables

• How to create the network slice based on the requirement of the 3rd party or customize
network function on-demand
• Above all bullets are not scope of 3GPP SA2
– Definition of requirements or guideline for global or public slice type (e.g., emergency, safety,
disaster, etc.)
• Possible work of ITU-T (e.g., not GSMA) from the viewpoint of wired and wireless convergence

Table 6.1.1-3 – Gap analysis

Issues related on Network Other SDO’s Activities Issues relevant to ITU-T Description
Softwarization
Network Function Definition and ETSI-NFV
Granularity
Network Function Software ETSI-NFV
Architecture
Service Chaining/BluePrint/Network high
Slice Creation/Type
Blueprint Deployment/Network Slice SA5
Instantiation
Network Slice Usage SA2 NSI selection

Network Slice Management SA5
Session Management SA2 SM
Network Function Discovery and SA2 KI7
Interconnection
Network Function Scale- SA2 KI19
in/out/migration
Network Capability Exposure SA2 KI9 high
Network Slice Interworking between SA2 roaming high
PLMNs
6.1.1.5 Future Plan for Phase 1 Normative Work

(excerpt from doc #S2-167232 (NextGen WID-v9) at SA2 #118 meeting. please verify all specifics necessarily.
for example, supporting features, and so on)

The objective of this work item is to develop the Stage 2 normative specification of Phase 1 of the 5G system
based on the conclusions captured in TR 23.799. Phase 1 specifies a deployable 5G architecture that supports
features including: network slicing, use of virtual environments, service-based architecture, network
capability exposure, network discovery and selection, and so on.
Phase 1 architecture also serves as a foundational architecture for enhancements in future releases that
would support additional features.
A set of new specifications will describe the 5G System:

– System Architecture for 5G System: Specifies the overall system architecture reference model
including network functions and description of high level functions.

– Procedures for 5G System: Specifies the procedures and flows to capture the interactions between
network functions, access network(s) and UE for the listed features.

Expected Output and Time scale:
– Work item rapporteur(s): China Mobile, Tao Sun (suntao@chinamobile.com)

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