Patent ID: 11889330
Assignee: ZTE CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for implementing disaster recovery, comprising:
based on determination that a main Session Management Function (SMF) fails, sending, by a backup SMF, a first request to a User Plane Function (UPF),
wherein the first request carries a node identifier (Node ID) of the main SMF, a Node ID of the backup SMF and a Common Session endpoint Identifier List (CSIDLIST) corresponding to the backup SMF, a session or sessions in the CSIDLIST corresponding to the backup SMF is/are the same as session or sessions in a CSIDLIST corresponding to the main SMF or is/are a part of the session or sessions in the CSIDLIST corresponding to the main SMF, and the first request is used for notifying the UPF that the main SMF fails and the session or sessions in the CSIDLIST corresponding to the backup SMF is/are to be taken over by the backup SMF, so that the UPF subsequently interacts with the backup SMF for the session or sessions in the CSIDLIST corresponding to the backup SMF.