Patent ID: 11902844
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A first device comprising:
at least one processor; and
at least one memory, the at least one memory comprising instructions that when executed by the at least one processor, cause the device to:
receive a first message from a second device, wherein the first message comprises a first indication and a second indication, the first indication instructing the first device to perform at least one of the following operations: a data recovery, a discarding of a data packet, or a delivery of a protocol data unit (PDU) corresponding to a first Service Data Unit (SDU) to a Radio Link Control (RLC) entity, and the second indication instructing the first device to re-establish the RLC entity,
wherein the first message is received when a cell handover or cell change occurs,
wherein a Packet Data Convergence Protocol (PDCP) entity uses a key used before a cell handover or a cell change when the cell handover or the cell change occurs, and
wherein when the PDCP entity is a PDCP entity of a signaling radio bearer (SRB), the first message instructs the first device to discard the data packet;
perform, based on the first indication, the data recovery, the discarding of the data packet, or the delivery of the PDU corresponding to the first SDU to the RLC entity; and

re-establish, based on the second indication, the RLC entity.