Page 1408 - 5G Basics - Core Network Aspects

3 Signalling aspects

Figure 7-1 – SBAN node initialization

The master aggregate node has all the information about the access ports and the aggregate ports, and
synchronizes with the slave aggregate nodes. When the master aggregate node fails, one of the slave
aggregate nodes will become the new master aggregate node which represents the SBAN nodes to maintain
communication with the SDN controller.

The internal interface between the aggregate nodes and the access nodes is not included in this
Recommendation.

7.2 Registration
After the SBAN node finishes its initialization, the master aggregate node is registered in the SDN controller
as the representation of the SBAN node. In this process, the master aggregate node announces its
information to the SDN controller, such as: address information, the slave aggregate nodes information. The
SDN controller responds with the registration information, and allocates an SBAN node identification (ID) to
the master aggregate node.
The master aggregate node registers all the ports, including the access ports and the aggregate ports of the
SBAN node, by using the SBAN node ID in the SDN controller.
Meanwhile, the SDN application is registered in the SDN controller.

7.3 Status query
After the SBAN node and the SDN application are registered in the SDN controller, the SDN controller queries
the their status. And the SDN application queries the topology and abilities of the SBAN nodes through the
SDN controller.

7.4 Service creation
The SDN application initiates the network service of the SBAN nodes, and the SDN controller receives and
translates the initiation. Then the SDN controller initiates the flows in the SBAN nodes.

1398