Page 1391 - 5G Basics - Core Network Aspects

Signalling aspects 3

As depicted in Figure A.4, some network services can specify the next process destination of a packet and
some network services need the BNG to specify the next processing destination of a packet. This then
becomes a hybrid service route path by combining the Lily service route path and Chrysanthemum service
route path.

The service route path is chained together by the central node (i.e., BNG) and distributed to multiple network
service nodes.

One possible scenario of this kind of service route path is a combination of the scenarios from clauses A.1.1
and A.1.2. When the parental control network service and video caching network service are deployed
simultaneously, the hybrid service route path is needed.

A.2 Requirements of the network service combination
The service platform may consist of some basic network service handling entities, which are called service
atoms. The service atom has its unique, integral and undivided network service functionality.
The service atoms within the service platform form the service atom base. By combing or linking one or more
service atoms, a new network service will be created. The newly created network service may be viewed as
a new service entity, which may be part of much more complicated network services. See Figure A.5.

Figure A.5 – Service atoms in the service platform

The service atom or service atoms combined together provides open APIs or SDKs to the network services
deployed on the service platform. Based on the APIs or SDKs, network services can easily use the already
existing service handling routine provided by the service atoms. The network service may also combine its
own handling with the service atoms, thus providing the intended service handling. With these features, an
open environment is provided for the ease of network service provisioning. Eventually, new technologies,
adoption requirements and fast-to-market requirements of network service will be satisfied.

Based on the network services request, the orchestrator in the service platform combines the service atoms
to generate the service intended. The scenario of how the service atoms are combined or linked together is
the same as the description in the previous clause, just like the way the network services are chained up,
i.e., the service route path.
For the network service combination, three types are needed and described in the following clauses.

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