Patent ID: 11864075
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A method for communication between a first user equipment (UE) and a second UE, the method comprising:
receiving, by a second user plane device serving the second UE, a first data packet from a first user plane device serving the first UE, wherein the first data packet is being sent from the first UE to the second UE, and the first data packet comprises an Internet Protocol (IP) address of the second UE;
when the second UE switches from the second user plane device to a third user plane device, receiving, by the second user plane device, a first updated session context record from a control plane device, wherein the IP address of the second UE remains unchanged when the second UE switches from the second user plane device to the third user plane device;
updating, by the second user plane device according to the first updated session context record, an identifier of a user plane device associated with the IP address of the second UE in a second context record on the second user plane device with an identifier of the third user plane device; and
sending, by the second user plane device according to the second context record, the first data packet to the third user plane device, wherein the first data packet is buffered on the second user plane device before the second user plane device sends the first data packet.