V2X PC5 Link Frequency Switching for Reliability
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Solution Overview
Problem
Current V2X transmission methods fail to ensure continuous communication when the link between UEs fails, particularly in scenarios where the signal quality is low or channel occupancy is high, leading to ineffective V2X transmission.
Innovation Solution
A V2X transmission method and device that dynamically switch or release the PC5 link at the current frequency and switch to another suitable frequency for V2X transmission, based on conditions such as signal quality, RSRP, channel occupancy, and block error rate, using sidelink control information to facilitate frequency switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If V2X transmission continues on the current frequency, then transmission stability is maintained, but transmission reliability deteriorates when signal quality degrades
Solution Approach 1:
The patent implements dynamic frequency switching by monitoring link quality metrics (RSRP, SINR, block error rate) and automatically transitioning between frequencies when thresholds are violated. This dynamic adaptation allows the system to maintain reliable V2X transmission by switching from a deteriorating frequency to an alternative frequency, resolving the contradiction between transmission stability and reliability.
Solution Approach 2:
The system continuously monitors transmission quality metrics including RSRP, SINR, and block error rate, and uses this feedback to determine when to switch frequencies. The feedback mechanism triggers frequency switching when quality thresholds are violated, ensuring reliable transmission while avoiding unnecessary switches that would increase complexity.
2Duration of action of stationary object
If frequency switching is implemented to maintain transmission, then transmission continuity is improved, but system complexity increases
Solution Approach 1:
The patent performs preliminary actions by pre-configuring alternative frequencies and establishing monitoring thresholds before transmission failures occur. When link quality deteriorates, the system has already identified alternative frequencies ready for switching, ensuring transmission continuity without requiring complex real-time decision-making, thus reducing overall system complexity.
Solution Approach 2:
The system changes operational parameters by switching frequencies based on monitored quality metrics. Instead of managing complex link protocols, the solution simplifies frequency management by changing the frequency parameter when quality thresholds are violated, maintaining transmission continuity through a relatively simple parameter change mechanism.
3Adaptability or versatility
If autonomous resource selection is used outside network coverage, then transmission independence is improved, but transmission efficiency deteriorates due to lack of centralized coordination
Solution Approach 1:
The patent implements self-service by enabling UEs to autonomously monitor link quality, detect degradation, and switch frequencies without network intervention. This self-service mechanism maintains transmission independence outside network coverage while improving resource utilization efficiency through intelligent, adaptive frequency selection based on actual transmission conditions.
Data Source
AI summary
A V2X transmission method and device, and a user equipment are provided. The method includes the following. Determine whether a PC5 link at a current frequency is suitable for V2X transmission during V2X transmission with a peer end. Switch to a PC5 link at another frequency for V2X transmission with the peer end or release the PC5 link at the current frequency, based on a determination that the PC5 link at the current frequency is no longer suitable for V2X transmission.