Page 1393 - 5G Basics - Core Network Aspects

Signalling aspects 3

Annex B

Scenarios and requirements of network service configuration on BNG
(This annex forms an integral part of this Recommendation.)

This annex describes some scenarios related to flexible network service combination on BNG.

B.1 Scenarios and requirements of the network service configuration on BNG
Network services all have different ways of packet handling. Different kinds of BNG functionalities are needed
by different kinds of network services.
Through the service platform, the network services enforce the functionalities required on BNG. At the same
time, the network services may also enforce their configuration on the service platform.
Most of the configurations fall into either the static configuration or the runtime configuration. The following
two clauses elaborate these in detail.

B.1.1 Static network service configuration on BNG
Mostly, the static configurations needed by a network service are pre-installed on the BNG before the
network service totally runs up. The static configurations mainly include the following:
1) Resource management:
The resource includes physical resources as well as logical resources, which may be ports, queues,
bandwidth, link-utilization, etc.
2) Network service handling configuration:
The service platform may include some basic network service handling entities, which are called
service atoms. For the network service composed of the service atoms, some rules/policies may be
needed by the service atoms. Then the network service handling configuration is just for these. One
possible example would be the URL filtering service atom, which is aimed to filter out and stop the
forbidden URL visiting based on black/white URL lists. The default black/white URL lists are setup by
the configuration. Some runtime configurations are also needed.
3) BNG behaviours management:
The BNG may behave either in the legacy network forwarding manner or in the software defined-
networking (SDN)/OpenFlow forwarding manner. Or the BNG may behave with both of the two, in
the hybrid manner. This main behaviour should be configurable in all levels of granularities, such as
per port, per line card, per chassis, entire network device, etc. Additional behaviours may include
topology discovery enabling or disabling, link monitoring enabling or disabling, statistics enabling or
disabling, etc. The BNG behaviour configuration should be able to enable or disable these
functionalities.
The static configurations may be done in the following ways:
1) by the operators/managers of the networks services;

2) by the networks service itself at initialization stage;
3) by the combination of the operators/managers and network service itself.

B.1.2 Runtime network service configuration on BNG
The runtime configurations are highly network service type and runtime packet relative. Some of the runtime
network service configurations are in the same range with the static configurations, the only difference is
whether the configuration is pre-determined or not.

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