Patent ID: 11895011
Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A data transmission method, applied to a terminal comprising a Packet Data Convergence Protocol (PDCP) layer entity, a first Radio Link Control (RLC) layer entity, and a second RLC layer entity, wherein the method comprises:
receiving, by the PDCP layer entity, a second PDCP Service Data Unit (PDCP SDU);
when a data duplication transmission function of the PDCP layer entity is activated,
encapsulating, by the PDCP layer entity, the second PDCP SDU into a second PDCP Protocol Data Unit (PDCP PDU), and,
sending, by the PDCP layer entity, the second PDCP PDU to the first RLC layer entity and the second RLC layer entity,
wherein after sending, by the PDCP layer entity, the second PDCP PDU to the first RLC layer entity and the second RLC layer entity, the method further comprises:
when the data duplication transmission function of the PDCP layer entity is deactivated, sending, by the PDCP layer entity, an indication to the first RLC layer entity; and
receiving, by the first RLC layer entity, the indication, and,
discarding, by the first RLC layer entity according to the indication, a second RLC SDU associated with the second PDCP PDU in the first RLC layer entity, wherein the second RLC SDU is not encapsulated and processed into an RLC PDU by the first RLC layer entity.