FIELD: electrical communication engineering.
SUBSTANCE: invention relates to communication. Method of transmitting data involves: determining, by a first terminal device, a method of transmitting a protocol data unit (PDU) of a packet data convergence protocol (PDCP). Transmission method includes a data transmission method based on copying data or based on single-channel data transmission. Terminal unit of a protocol data unit (PDU) of a packet data convergence protocol (PDCP) transmits data to a second terminal device or a network device according to a transmission method defined for a packet data protocol convergence protocol (PDCP) of protocol data unit (PDU).
EFFECT: technical result of the invention is transmission of a plurality of same duplicated PDCP PDUs on different physical aggregation aggregation aggregates to achieve amplification by frequency diversity, thereby improving reliability of data transmission.
18 cl, 8 dwg
