5G Services - General network procedures
These procedures include the following :
- Registration management
- Service request
- UE configuration update
- Access network (AN) release
- Attribute specific UE and RAN information & compatibility
The 3GPP defines the signalling flows for the 5G connections , comprises initial attachment to the network referred to as registration , call initialization, mobility management procedures in idle and connected modes, PDU session establishment , termination of the sessions and deregistering from the network .
Registration & mobility management
Registration procedure :
The registration & deregistration procedures provide the functionality to register or deregister a UE with the 5G system , together with additional functionality to also assist registration management for non-3GPP access.
De-registration procedure : It is designed for UE to inform the network to stop accessing the 5G core and the 5G core to inform the UE about the released access.
Connection establishment : session mgt
For V-SMF and H-SMF , there is indication of NAS SM signalling for PDU session establishment , PDU type etc. H-SMF provides the V-SMF with the IPV6 prefix for the respective PDU session for facilitating data storage in visited country.
PDU session establishment
- PDU session establishment procedure
- PDU session handover procedure between 3GPP and non 3GPP
- PDU session handover from EPS to 5GS