Page 204 - 5G Basics - Core Network Aspects

1 Core network aspects

In S-NICE, the open environment capability and the service control capability of NICE are both provided by
the S-NICE orchestration capabilities. In addition, the S-NICE orchestration capabilities are required to
provide interfaces to the S-NICE controller capabilities which are located in the transport control layer.
The S-NICE orchestration capabilities are required to connect with all the S-NICE controllers and offer access
to all the controllers' capabilities for third-party and self-operated applications.
NOTE – The notion of S-NICE controller will be introduced in clause 7.3.
The S-NICE orchestration capabilities also allow applications to not have to deal with each S-NICE controller
one by one, they can be aware of and access the capabilities of all S-NICE controllers. Moreover, the
orchestration capabilities are required to monitor the network and notify the applications when applicable.
The orchestration capabilities are required to support, but are not limited to, the following features:
• access to open environment for applications including content and context analysis openness, policy
control openness, and traffic engineering openness;
• virtualized network information provision to applications, such as provision of virtual network
topology, route path setting and delivery node selection [ITU-T Y.2301];
• monitoring of S-NICE controllers' status;
• selection of the S-NICE controller capabilities;
• service creation and provisioning based on applications' requirements;

• orchestration of the S-NICE controller capabilities based on applications' requirements;
• orchestration of the S-NICE controller capabilities based on virtualized network and physical
network status;

• conflict management and negotiation to maintain policy consistency among different capabilities of
a S-NICE controller, among different S-NICE controllers, and between S- NICE controller capabilities
and S-NICE infrastructure capabilities.

7.3 The S-NICE controller capabilities at the transport layer
The S-NICE controller capabilities are required to provide the transport control capabilities such as the policy
control capability and the traffic scheduling capability. Because the policy control capability and the traffic
scheduling capability are enhanced in S-NICE so that the policy decisions and the traffic scheduling rules
transferred to the S-NICE infrastructure capabilities are straightforward instructions, the S-NICE
infrastructure capabilities no longer need to understand and process various protocol standards as in
traditional NGNs or NICEs, but merely accept instructions from the centralized S-NICE controller capabilities.
NOTE 1 – From an implementation point of view, the policy control capability and the traffic scheduling capability of S-
NICE are implemented within a single S-NICE controller, and because of the limitation of geographical reasons and
processing capabilities, multiple S-NICE controllers may be required to control different network regions.
The S-NICE controller capabilities are required to connect with the S-NICE orchestration capabilities and the
S-NICE infrastructure capabilities by using SDN related protocols. The S-NICE controller capabilities are
required to control the S-NICE infrastructure capabilities in order to meet the applications' requirements.
The S-NICE controller capabilities are required to support, but are not limited to, the following features:
• connection with the S-NICE orchestration capabilities and with the S-NICE infrastructure capabilities;
• policy control and network resource management based on infrastructure information;

NOTE 2 – The S-NICE controller capabilities can obtain information from network links and nodes to compute network
topology information. The S-NICE controller capabilities can also obtain resource usage information and statistics from
the network management system and the content and context analysis capability;
• policy control based on application requirements provided by the S-NICE orchestration capabilities,
information from network resource management, and analysis results from the content and context
analysis capability;

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