Sidelink Duplication Transmission for V2X Reliability
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Solution Overview
Problem
Current communication systems, particularly in V2X scenarios, face challenges in ensuring reliable data communication due to limitations in duplication transmission modes, especially when utilizing sidelinks for multi-carrier communications in 5G NR systems.
Innovation Solution
The proposed solution involves a data communication method and devices that enable data communication in a sidelink duplication transmission mode. This includes a first device that transmits first data on a sidelink in a duplication transmission mode, and a second device that performs carrier sensing and receives the first data transmitted by the first device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If duplication transmission mode is implemented on sidelink for V2X communication, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the data transmission process by dividing data into original data and duplicate data, transmitting them through different carriers (first carrier and second carrier respectively). This segmentation allows the system to achieve reliability through redundancy while managing complexity by organizing the transmission into distinct, manageable components with clear mapping relationships.
Solution Approach 2:
The patent changes the transmission parameters by configuring different mapping relationships between logical channels and carriers based on duplication mode indicators. When duplication is enabled, the system configures separate mapping relationships for original and duplicate data, allowing flexible parameter adjustment to balance reliability requirements with device complexity through configurable transmission modes.
2Reliability
If carrier sensing is performed on sidelink before data reception, then data transmission reliability is improved, but transmission delay increases
Solution Approach 1:
The patent implements preliminary carrier sensing before data transmission and reception on the sidelink. The second device performs carrier sensing to detect whether the channel is occupied before receiving data, and the first device performs sensing before transmitting. This preliminary action ensures reliable transmission by avoiding collisions while the system manages delay through efficient sensing procedures and pre-configured transmission parameters.
Data Source
AI summary
A data communication method includes: transmitting, by the first device, first data on a sidelink in a duplication transmission mode.