Sidelink Feedback Signaling for Reliable NR V2X Transmission
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Solution Overview
Problem
The challenge of achieving transmission reliability in Vehicle-to-Everything (V2X) systems using Device-to-Device (D2D) communication, particularly in New Radio (NR) systems, where higher spectrum efficiency and lower transmission delay are required.
Innovation Solution
Implementing a communication method that involves a first terminal device receiving a sidelink transmission channel from a second terminal device and sending a feedback message through a second sidelink transmission channel, utilizing configured transmission resources to enhance transmission reliability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Device-to-Device direct communication mode is used in V2X system, then spectrum efficiency is improved and transmission delay is reduced, but transmission reliability deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the first terminal device sends a feedback message to the second terminal device after receiving the first message. This feedback loop allows the transmitting device to adjust its transmission based on reception status, thereby improving transmission reliability while maintaining the spectrum efficiency and low delay benefits of D2D communication mode.
Solution Approach 2:
The network device configures a first transmission resource set for the terminal device group before actual communication occurs. This preliminary resource configuration ensures that transmission resources are pre-allocated and optimized, enabling reliable communication while maintaining high spectrum efficiency and low latency characteristics of sidelink D2D mode.
2Reliability
If feedback message is transmitted through additional channel, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent reuses the existing sidelink transmission channel for both the original message transmission and the feedback message transmission. By making the sidelink channel multi-functional, the system avoids adding separate dedicated feedback channels, thus improving transmission reliability through feedback while preventing an increase in device complexity.
Solution Approach 2:
The feedback transmission function is merged with the existing message transmission function on the same sidelink channel. This consolidation allows the system to achieve reliable communication through feedback mechanisms without requiring additional separate channels or complex infrastructure, thereby maintaining simplicity while improving reliability.
Data Source
AI summary
Provided by the implementations of the present application are a communication method and terminal, which may achieve reliability of system transmission by using a terminal-to-terminal mode to carry out communication. The method comprises: a first terminal device receiving a first sidelink transmission channel sent by a second terminal device, the first sidelink transmission channel being used to transmit a first message; in response to the first message, the first terminal device sending a second sidelink transmission channel to the second terminal device, the second sidelink transmission channel being used to transmit a second message, and the second message being a feedback message for the first message.