Sidelink Parameter Set Selection for V2X Latency
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Solution Overview
Problem
The challenge in V2X systems is selecting an appropriate basic parameter set for data transmission when multiple sets are available, which affects the efficiency and latency of data communication.
Innovation Solution
A method for determining a basic parameter set for SL channels based on corresponding relationships with resource pools, carriers, channel types, service features, and synchronization sources, as well as explicit or implicit indications from other channels, ensuring efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple basic parameter sets are introduced to support different subcarrier spacing in 5G NR system, then the adaptability and flexibility of the system is improved, but the complexity of selecting appropriate parameter sets increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing correspondence relationships between resource pools/carriers and basic parameter sets before data transmission occurs. The terminal device determines which basic parameter set to use based on pre-configured relationships, eliminating the need for real-time complex selection and reducing operational complexity while maintaining system adaptability across multiple parameter sets
2Loss of time
If different subcarrier spacing are used to reduce latency, then the time efficiency is improved, but the complexity of parameter selection and system configuration increases
Solution Approach 1:
The patent applies parameter changes by enabling the system to switch between different basic parameter sets with different subcarrier spacing values (e.g., 15kHz, 30kHz, 60kHz, 120kHz) based on latency requirements. The pre-established correspondence relationships allow efficient parameter switching without complex real-time calculations, thus reducing latency while managing configuration complexity
3Measurement precision
If extended CP is used for larger subcarrier spacing, then the time accuracy is improved, but the duration of transmission time increases
Solution Approach 1:
The patent applies dynamics by allowing the system to dynamically select between normal CP and extended CP based on the specific subcarrier spacing and transmission requirements. The terminal device determines the appropriate CP type according to pre-established correspondence relationships, enabling flexible adaptation that optimizes time accuracy when needed while minimizing transmission time when possible
Data Source
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AI summary
A data transmission method, a terminal device, a network device, a chip, a computer-readable storage medium, a computer program product and a computer program are provided. The method includes that: a basic parameter set adopted for a first sidelink (SL) channel is determined; and data transmission is performed on the first SL channel based on the basic parameter set.