Page 345 - 5G Basics - Core Network Aspects

Core network aspects 1

Appendix III

Policy required for different scenarios
(This appendix does not form an integral part of this Recommendation.)

When analysing the five scenarios introduced in [b-ITU-T Y-Sup.9]; i.e., scenarios A, B, C, D, and E, it is
recognized that they entail different policy functionality according to the involved radio access technologies,
access control, service control, and applications' requirements.
Different policy requirements are applicable on a scenario-wise approach as outlined below:
1) Networks supporting Scenario B

Networks supporting scenario B are required to include an access policy capability. The access policy
capability is required to support policies for meeting QoS requested by the access technology through
aggregation of the multiple available access points.
2) Networks supporting Scenario C

Networks supporting scenario C are required to include a QoS policy capability. The QoS policy capability is
required to support policies for meeting application QoS by appropriately using the QoS offered by the
various available access technologies.
3) Networks supporting Scenario D

Networks supporting scenario D are required to include an application policy interface. The application policy
interface is required to provide an interface to the application's multi-connection policy function.

4) Policy requirements common to all scenarios
Some policy requirements are considered common to all five scenarios, some of these are:
• The multi-connection network is required to be able to communicate policies to the UE directly or
via the multi-connection service control function.
• Multi-connection network is required to include a policy coordination function for the coordination
of the multiple policy entities present in the network.

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