Page 202 - 5G Basics - Core Network Aspects

1 Core network aspects

usage, network monitoring and statistics, etc. The policy control capability is also required to support
additional service layer APIs in order to allow on-demand resource allocation and self-service provisioning to
application providers and users. The policy control capability is enhanced in S-NICE, so that the policy
decisions transferred to the policy enforcement capability of S-NICE are straightforward instructions.

In S-NICE, the policy enforcement capability no longer needs to understand and process various protocol
standards as in traditional NGNs or NICEs, but merely accepts instructions from the policy control capability
of S-NICE and performs actions such as packet forwarding and packet dropping. The transfer of the policy
control decisions between the policy control capability and the policy enforcement capability is required to
support SDN related protocols.

6.6 Requirements of traffic scheduling
In NICE, the traffic scheduling capability receives the application's traffic delivery requirements from the
service control capability and analysis results from the content and context analysis capability. Then, it
establishes traffic scheduling rules based on these results. The traffic scheduling capability of NICE includes
route and delivery node selection or adjustment based on traffic localization, network status, etc.

In NICE, the traffic scheduling enforcement capability is based on pre-defined rules, and receives traffic
scheduling rules from the traffic scheduling capability.

In S-NICE, the traffic scheduling capability is one of the S-NICE controller capabilities. It includes traffic
engineering based on multicast routing optimization, processor and storage optimization, etc. The traffic
scheduling capability is also required to support additional service layer APIs to allow on-demand resource
allocation and self-service provisioning to application providers and users. The traffic scheduling capability is
enhanced in S-NICE, so that the traffic scheduling rules transferred to the traffic scheduling enforcement
capability of S-NICE are straightforward instructions.

In S-NICE, the traffic scheduling enforcement capability no longer needs to understand and process various
protocol standards as in traditional NGNs or NICEs, but merely accepts instructions from the traffic scheduling
capability of S-NICE and performs actions such as input and output port selection and route selection. The
transfer of the traffic scheduling rules between the traffic scheduling capability and the traffic scheduling
enforcement capability is required to support SDN related protocols.

6.7 Requirements of access and core transport

In NICE, the access and core transport capabilities provide the connectivity for the components of the NICE
provider's infrastructure. They provide support of application data delivery, as well as the delivery of control
and management information.

The access and core transport capabilities requirements of S-NICE are aligned with the requirements of NICE
[ITU-T Y.2301], and have some enhancements. In S-NICE, the access and core transport capabilities are part
of the S-NICE infrastructure capabilities, and they are required to perform the decisions made by the S-NICE
controller capabilities. In addition, the access and core transport capabilities are required to support SDN
related protocols.

6.8 Requirements for support of virtualized network and virtualized network functions
S-NICE is required to support virtualized network and virtualized network functions, which decouple network
function software from hardware, in order to provide various capabilities including fast network function
deployment, abstraction of transport, computing and storage resources, dynamic virtual and physical
resource management, automatic fault detection and recovery, and on-demand system scalability.
S-NICE is required to support the coexistence of virtualized network functions and non-virtualized network
functions by virtualizing some network functions while still having some other non-virtualized functions in
the same network. S-NICE is also required to support the coexistence of a virtualized network and a non-
virtualized network by deploying a new complete virtualized network which can be used for specific services
and devices (e.g., Internet of Things (IoT) applications and devices) or for traffic exceeding the capacity of the
non-virtualized network while still having the non-virtualized one.

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