Sidelink Strategy Selection for 5G V2X Power and Reliability
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Solution Overview
Problem
Current sidelink communication technologies in 5G V2X systems require continuous channel sensing to avoid interference, leading to high power consumption, which is unsustainable for terminals with high power requirements and does not adequately address energy-saving needs.
Innovation Solution
A method where terminals select a sidelink strategy based on channel congestion conditions, either sensing fewer resources for power-saving or all resources to avoid collisions, by using a Channel Busy Ratio (CBR) measurement to determine the appropriate strategy and adjust data transmission parameters accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous channel sensing is performed to avoid mutual interference, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the sensing behavior adaptive rather than static. The terminal device dynamically adjusts its sensing strategy based on channel congestion conditions - when congestion is high, it performs continuous sensing to ensure reliable resource selection; when congestion is low, it reduces or skips sensing to save power. This dynamic adaptation resolves the contradiction between maintaining communication reliability and reducing power consumption.
Solution Approach 2:
The patent changes the parameter of sensing intensity based on channel congestion conditions. By monitoring channel occupancy and interference levels, the terminal adjusts the sensing window size, sensing frequency, and resource selection strategy. When channel conditions are good (low congestion), the sensing parameter is reduced or disabled; when conditions deteriorate (high congestion), sensing parameters are increased to maintain reliable communication.
2Use of energy by moving object
If fewer resources are sensed to save power, then power consumption is reduced, but channel collision probability increases
Solution Approach 1:
The patent implements feedback mechanisms where the terminal continuously monitors channel congestion conditions including occupancy ratios and interference levels. Based on this feedback, it adjusts its resource selection strategy - when congestion is detected, the terminal expands sensing range or increases sensing frequency to avoid collisions; when congestion is low, it can use compressed sensing or random selection to save power while maintaining acceptable collision probabilities.
3Reliability
If all resources are sensed to avoid collisions, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the sensing process into different levels or modes. Instead of always performing complete sensing of all resources, the terminal segments sensing into essential resources (high priority) and optional resources (low priority). Based on channel conditions and service requirements, it selectively senses only the necessary segments, reducing complexity while maintaining reliability for critical communications.
Data Source
AI summary
Disclosed is a sidelink method, belonging to the technical field of wireless communications. The method includes: a first terminal obtaining a channel congestion condition and selecting a sidelink strategy based on the channel congestion condition, where the sidelink strategy is associated with sensing and/or selecting a sidelink resource.