Patent ID: 11963126
Assignee: T-MOBILE INNOVATIONS LLC
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of operating a wireless communication network to deregister network functions, the method comprising:
a Unified Data Registry (UDR) receiving a deregistration command that indicates a wireless User Equipment (UE) and forwarding the deregistration command to a Unified Data Management (UDM);
the UDM receiving the indication, determining a Data Network Name (DNN) for the wireless UE, identifying an Access and Mobility Management Function (AMF) and a Session Management Function (SMF) for the wireless UE based on the DNN, transferring a first deregistration notification to the AMF, transferring a second deregistration notification to the SMF, receiving a deregistration acknowledgement from the AMF, and directing the UDR to remove stored session data for the SMF;
the AMF directing the wireless UE to deregister with the wireless communication network;
the SMF directing a user plane User Plane Function (UPF) to stop serving the wireless UE; and
the UDR receiving the direction from the UDM and responsively removing the stored session data for the SMF.