Patent ID: 11968127
Assignee: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. The method of claim 6, wherein establishing the first data transmission tunnel between the first UPF and the second UPF, comprises:
determining a User Plane (UP) context for the second terminal from the SMF based on a second identifier of the second terminal;
determining the second UPF serving the second terminal based on the UP context; and
establishing the first data transmission tunnel between the first UPF and the second UPF by performing an N4 session modification procedure of the first UPF and updating opposite endpoint information in tunnel information of the first UPF based on tunnel information of the second UPF, wherein the opposite endpoint information is tunnel information related to an opposite endpoint to which the first data transmission tunnel is connected.