Patent ID: 11451954

Abstract:
A wireless communication network serves a wireless User Equipment (UE) over multiple Data Network Names (DNNs). The wireless communication network comprises network circuitry and a Radio Access Network (RAN). The network circuitry executes a Unified Data Management (UDM), a Session Management Function (SMF), and an Access and Mobility Management Function (AMF). The UDM detects a DNN reattach condition for the wireless UE and transfers a DNN reattach message for the UE to the SMF. The SMF receives the DNN reattach message and responsively transfers the DNN reattach message to the AMF. The AMF receives the DNN reattach message for the wireless UE and responsively transfers an N2 Packet Data Unit (PDU) session reattach message for the wireless UE to the RAN. The AMF receives an N2 PDU session request from the RAN for the wireless UE and responsively selects a new SMF for the PDU session.