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

Claim 16:
17. The method according to claim 16, after sending, by the main SMF, the third request to the UPF or after receiving, by the main SMF, the third response for accepting the third request from the UPF, further comprising:
acquiring, from an Unstructured Data Storage Function (UDSF) by the main SMF, context of the session or sessions in the CSIDLIST corresponding to the main SMF; and
sending, by the main SMF, a fourth request to the UPF,
wherein the fourth request carries a Control Plane (CP) Fully Qualified Session Endpoint Identifier (F-SEID) acquired from the context, an Internet Protocol (IP) address in the CP F-SEID being updated to an IP address of the main SMF; and the fourth request is used for notifying the UPF to record the updated CP F-SEID for the session or sessions in the CSIDLIST corresponding to the main SMF, and remove a migration flag of the session or sessions in the CSIDLIST corresponding to the main SMF.