Page 222 - 5G Basics - Core Network Aspects

1 Core network aspects

In general, S-NICE controller functions provide the policy control function and the traffic scheduling function
of NICE. By using SDN concept and technologies, the policy decisions and the traffic scheduling rules
transferred to S-NICE infrastructure functions are straight forward instructions.
S-NICE controller functions provide policy control and network resource management based on S-NICE
infrastructure information.
S-NICE controller functions provide policy control function based on S-NICE infrastructure information,
application requirements of S-NICE orchestration functions and analysis result from the content and context
analysis FE.
S-NICE controller functions provide traffic scheduling function based on application requirements provided
by S-NICE orchestration functions, and analysis results from the content and context analysis FE.
S-NICE controller functions can cooperate between physical networks and virtualized networks.

7.3.1 Policy creation FE
The policy creation FE receives service requests from S-NICE orchestration functions and topology
information from the topology management FE. Based on the ''dynamic'' resource control requirements from
users and applications, the content and context analysis results from the content and context analysis FE,
and the topology and traffic information from the topology management FE, the policy creation FE creates a
set of policy rules, and sends these policy rules to the policy management FE.

7.3.2 Policy management FE
The policy management FE provides policy registration, policy storage and policy governance functionalities,
the policy management FE also maintains a catalogue of the registered policy rules interacting with the policy
and rule translation FE.

The policy management FE processes the policy rules registration requests from the policy creation FE. When
one policy rule needs to be registered or unregistered, the policy management FE adds or removes the policy
rule from the local catalogue. Then the policy management FE sends registered policy rules in the local
catalogue to the policy and rule translation FE for further processing.

7.3.3 Topology management FE
The topology management FE receives global topology information from the topology collection FE and
provides maintenance functionality with the global topology. The topology management FE provides the
global topology information to the traffic scheduling and optimization FE, and also obtains traffic
optimization results (e.g., routing path selection) from the traffic scheduling and optimization FE.

By combining the global topology information and the traffic optimization results (e.g., routing path
selection), the topology management FE provides a global topology with detailed traffic load information to
the policy creation FE and the S-NICE orchestration functions.

7.3.4 Topology collection FE
The topology collection FE collects topology information from the policy and rule translation FE, and the
topology collection FE processes all the topology information and generates the global topology information
based on every network node's status and each link's status. The topology collection FE sends the global
topology information to the topology management FE for further processing.

7.3.5 Traffic scheduling and optimization FE
The traffic scheduling and optimization FE receives global topology information from the topology
management FE, and the real time traffic load information from the traffic monitoring FE. The traffic
scheduling and optimization FE also receives service requests from S-NICE orchestration functions. By using
all the information together, the traffic scheduling and optimization FE computes the optimized routing path
and traffic scheduling results, and provides the traffic optimization results to the topology management FE.

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