Page 150 - ITU-T Focus Group IMT-2020 Deliverables

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Figure 7.1-3 – Assumed Conceptual Implementation Model and the Model of
Conceptual IMT-2020 non-radio network architecture [Ref.7.1-3]
7.1.2 The information messages exchanged at the reference point

7.1.2.1 Message categories at the reference point
In this subsection, the information messages exchanged at reference point which means the virtual resource
interface between SEC and PRC are described especially for the FH/BH. The functionalities provided by the
other regions will be described in the other subsections or documents.
Each SEC converts requirements from orchestrator into virtual resources and manages virtual resources of
slice elements. SEC also exchanges information of virtual resources with slice elements via virtual resource
interface.
At the virtual resource interface, the information messages controlling and managing virtual resources are
exchanged. The information messages are as follows. The names of the example messages are tentatively
given.

Information messages between SEC and PRC
a) Messages related with the “Create”
These messages are prepared to create the new virtual links, new virtual network services or new
some other items for virtual resource level services.
One example of this message is “Virtual Resource Reservation” message. According to the
requirement from orchestrator, SEC sends this message to PRC to reserve the virtual resource of
PRC. For the response of this message, “Virtual Resource Reservation Complete” message is
prepared. The PRC sends SEC this message to inform the result of the physical resource reservation.

b) Messages related with the “Update”
These messages are prepared to update (including change value of parameters or modify of
characteristics) the described items for the virtual resource level services.

One example of this message is “Virtual Resource Modify” message. According to the requirement
from orchestrator, SEC sends this message to PRC to change the value of reserved virtual resource
of PRC like “Change the bandwidth from 1Gbit/sec to 2Gbit/sec”. For the response of this message,
“Virtual Resource Modify Complete” message is prepared. The PRC sends SEC this message to inform
the result of change value of the physical resources.

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