Page 156 - ITU-T Focus Group IMT-2020 Deliverables

3 ITU-T Focus Group IMT-2020 Deliverables

7.2 The review of the gaps described in Phase 1 Report and usecases

7.2.1 Review of the gaps described in Phase 1 Report and required functionalities on the Virtual
Resource interface.
In the FG-IMT-2020 Phase 1 report [Ref.7.1-1], 21 gaps are pointed out. In these gaps, some of them are
discussed in SG15 or other SDOs. In the Network Softwarization working group in the FG-IMT-2020, 11gaps
should be discussed (That is agreed in the Seoul meeting on March 2016).
In this subsection, the relation between the gaps described in the Phase 1 report [Ref.7.1-1] and
functionalities controlled by the information(s) are reviewed. Then, it is clarified whether the gaps can be
resolved by the set of the described functionalities or not. The detailed descriptions are described as follows.

7.2.1.1 Large capacity transmission (D.7.1-1)
In the IMT2020 network, large capacity virtual link with the some order made functionalities are required.
Therefore, to establish the large capacity transmission, the information(s) at the reference points should be
able to include the section of the virtual link, bandwidth, signal format and some optional indexes. Section
7.1 with Table 7.1-1 describes to include these functions.

7.2.1.2 Power saving by sleep or rate control (D.7.4)
For power saving by sleep or rate control, power consumption mode should be ordered from Network &
Service Orchestrator to Control Functions. The following information(s) can be used for power saving such as
service class, bandwidth and signal quality. Addition to them, the mechanism can be used for the more useful
or detailed power saving which is described in the previous subsection. These information(s) will be ordered
from network & Service Orchestrator to Physical Resource Controller Functions as described in Section 7.1
with Table 7.1-1.

7.2.1.3 PON as a virtual digital wireline service (D.7.5-1)
When PON would like to be used for the system to provide the virtual digital wireline (VDW) service, the
section for VDW, bandwidth, and signal format should be mandatory ordered. The reliability or the other
options are also used.

To establish slice for virtual digital wireline service using PON, the parameter of service classes such as pseud
wire, VBR, ABR are required to share the virtual resource with other transport link. These information(s) will
be ordered from network & Service Orchestrator to Physical Resource Controller Functions as described in
Section 7.1 with Table 7.1-1.

7.2.1.4 Reliability and resiliency (D.7.6)
To provide the slices with reliability or resiliency, the reliability mode should be ordered from network &
Service Orchestrator to Control Functions. In the document [Ref.7.1-4] describes the functions that can be
associated to an connection, such as protection switching is referenced as secondary entities through the
associated LTP (Logical Termination Point) instance in Section 4.6 of [Ref.7.1-4].

7.2.1.5 Diversified types of terminals (D.7.7-1)
In the IMT-2020 network, deferent slices will be able to be prepared for the different types of terminals. Each
slice will have the suitable virtual link with the suitable sections, bandwidth and signal format. These
information(s) will be ordered from Orchestrator to Physical Resource Controller as described in Section 7.1
with Table 7.1-1.

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