Patent ID: 11968576
Assignee: ZTE CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A data transmission tunnel address coordination device, comprising:
one or more processors configured to:
in a handover process of a terminal from a source base station side to the data transmission tunnel address coordination device, determine a user plane function (UPF) split state of a protocol data unit (PDU) session of the terminal, and a target bearer base station for carrying the PDU session;
acquire a first base station downlink address allocated to the PDU session by the target bearer base station;
before the handover process is completed, send the first base station downlink address allocated by the target bearer base station and a second base station downlink address allocated by the target base station side to a session management function (SMF) network element in a core network;
acquire a first UPF network element uplink address allocated to the target base station and a second UPF network element uplink address allocated to the target bearer base station from the SMF network element; and
before the handover process is completed, send the second UPF network element uplink address to the target bearer base station for the target bearer base station to establish a data transmission tunnel with a UPF network element, wherein the data transmission tunnel is used for transmitting the PDU session.