US Patent 11963126 Network function deregistration in wireless communication networks

A wireless communication network deregisters network functions. In the wireless communication, a network data system receives a deregistration command that indicates a wireless User Equipment (UE) and forwards the deregistration command to a Unified Data Management (UDM). The UDM receives the indication and determines a Data Network Name (DNN) for the wireless UE. The UDM identifies a network controller and a session controller for the wireless UE based on the DNN. The UDM transfers deregistration notifications to the network controller and session controller. The UDM receives a deregistration acknowledgement from the network controller. The UDM directs the network data system to remove stored session data for the session controller. The network data system receives the direction from the UDM and responsively removes stored session data for the session controller.