Data transmission method and device

Abstract

The invention provides a data transmission method and a data transmission device, which can reduce the resource overhead. The method comprises the steps that a first device receives a plurality of first copies of the same data packet sent by a second device on a plurality of logic channels of a radio link control RLC layer; The first device transmits at least a part of a first copy of the plurality of first copies to a packet data convergence protocol (PDCP) layer of the first device on at least a part of the logical channels of the plurality of logical channels; And the first device sends a state report to the second device, wherein the state report is used for indicating at least one of the end of a first time period and the receiving condition of at least one copy of the first device, the first time period is the receiving time of the first device for receiving the at least one copy, and the at least one copy comprises the first copy.

Description

Technical field [0001] This application relates to the field of communications, and more specifically, to methods and devices for transmitting data in the field of communications. Background technique [0002] With the development of future communication systems, different services have different requirements for mobile communication systems. Some services have higher requirements for communication rates, and some have higher requirements for delay. For example, high-reliability and low-latency communication ( Ultrareliable and low latency communications (URLLC) services require high reliability. Therefore, when a data packet reaches the packet data convergence protocol (packet data protocol, PDCP) layer, in order to improve the reliability of transmission, the PDCP layer can be Data packets are mapped to multiple logical channels in the radio link control (RLC) layer, and multiple identical copies are generated. Multiple identical copies are sent on multiple different carriers, ...

AI Technical Summary

Problems solved by technology

[0002] With the development of future communication systems, different services have different requirements for mobile communication systems. Some services have relatively high requirements for communication speed, and some services have relatively high requirements for delay. For example, high reliability and low delay communication ( Ultrareliable and low latency communications (URLLC) services have high requirements on reliability. Therefore, when a data packet arrives at the packet data convergence protocol (PDCP) layer, in order to improve the reliability of transmission, the PDCP layer can be The data packet is mapped to multiple logical channels of the radio link control (RLC) layer, and multiple identical copies are generated, and multiple identical copies are sent on multiple different carriers, so that different carriers can Send the same data to improve the reliability of data transmission and reduce the delay. If the data is unsuccessfully sent on some carriers, it can be retransmitted, but the same data is sent on multiple carriers, and after each carrier fails to send , continue to retransmit, which will cause a large resource overhead

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