Page 1408 - 5G Basics - Core Network Aspects
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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.




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