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

Claim 0:
1. A method for communication between a first user equipment (UE) and a second UE, comprising:
receiving, by a first user plane device, a first data packet to be sent to the second UE from the first UE, the first data packet including first data and an Internet Protocol (IP) address of the second UE;
obtaining, by the first user plane device, an identifier of an second user plane device which is associated with the IP address of the second UE from a first context record, wherein the second user plane device serves the second UE;
sending, by the first user plane device, the first data packet to the second user plane device according to the identifier of the second user plane device;
receiving, by the first user plane device, a first updated session context record from a control plane device when the second UE switches to a third user plane device that serves the second UE after the switch, 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 first user plane device according to the first updated session context record, the identifier of the second user plane device associated with the IP address of the second UE in the first context record with an identifier of the third user plane device;
receiving, by the first user plane device, a second data packet to be sent to the second UE from the first UE, wherein the second data packet includes the IP address of the second UE; and
sending, by the first user plane device, the second data packet to the third user plane device according to the identifier of the third user plane device associated with the IP address of the second UE in the first context record.