Page 205 - 5G Basics - Core Network Aspects

Core network aspects 1

• traffic scheduling based on information provided by network resource management, application
requirements provided by the S-NICE orchestration capabilities, and analysis results from the
content and context analysis capability;
• receiving results of content and context analysis of infrastructure and applications, and performing
policy control and traffic scheduling based on these results. The S-NICE controller capabilities are
required to be aware of physical and virtual network topology, traffic flows and information of the
infrastructure;
• cooperation with the network management system to provide operation, administration and
maintenance (OAM) and alarm information;
NOTE 3 – The S-NICE controller capabilities can provide additional support for the provisioning of OAM and alarm
information, however functional overlapping between S-NICE controller capabilities and the network management
system needs to be avoided.
• cooperation between physical network and virtualized network;
• connection with other S-NICE controller capabilities;
• monitoring of physical network and virtualized network.

7.4 The S-NICE infrastructure capabilities at the transport layer

The S-NICE infrastructure capabilities implement the actions decided by the S-NICE controller capabilities.
The S-NICE infrastructure capabilities include the policy enforcement capability, the traffic scheduling
enforcement capability, the content and context detection capability, and the access and core transport
capability of S-NICE.
The S-NICE infrastructure capabilities are required to support, but are not limited to, the following features:

• communication with the S-NICE controller capabilities;
• provision of the infrastructure information (e.g., network topology information, flow information,
service routing information) to the relevant S-NICE controller capabilities based on requests;

NOTE 1 – Different S-NICE controller capabilities may request different infrastructure information.
• forwarding of traffic on a per flow basis;
• forwarding of traffic while maintaining policy consistency among the S-NICE controller capabilities,
the S-NICE infrastructure capabilities and the applications;
• isolation and virtualization of different parts of the network;
NOTE 2 – For example, many access transport networks can be isolated from each other and virtualized as one network.
• reception of policy decisions from the S-NICE controller capabilities and enforcement of these policy
decisions (e.g., by packet forwarding and processing);
• reception of traffic scheduling rules from the S-NICE controller capabilities and enforcement of these
traffic scheduling rules (e.g., by transport node selection and path selection).

8 Security considerations

The security requirements of S-NICE are aligned with the security requirements of NICE [ITU-T Y.2301] with
the following additional requirements:

• enhanced security of the SDN controller(s) which incorporates the transport control capabilities,
because the logically centralized controller could be a single point of failure, or a target of malicious
attacks;
• secure mechanisms to authorize network configurations and operations such as routing path
establishment or virtualized network function deployment, upon demand by services or
applications;

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