Vehicle Signal Synchronization to Avoid Source Switching Interruptions
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Solution Overview
Problem
Existing vehicle-to-vehicle communication systems face interruptions due to synchronization source switching during signal synchronization, leading to potential communication failures.
Innovation Solution
A method for vehicle-to-vehicle signal synchronization that involves a terminal device determining whether synchronization information is the same before synchronizing with another device, waiting for a random duration if different, and using the other device as a synchronization source only when necessary, thereby reducing the probability of communication interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a terminal device immediately synchronizes with another terminal device upon detecting synchronization information, then synchronization speed is improved, but communication interruptions occur due to synchronization source switching
Solution Approach 1:
The terminal device performs preliminary comparison of synchronization information (S-SyncInfo) before executing synchronization. By checking whether the received synchronization information matches its own S-SyncInfo in advance, the device avoids immediate synchronization when unnecessary, thereby preventing synchronization source switching while maintaining fast synchronization when needed.
2Measurement precision
If a terminal device continuously monitors synchronization information from other devices, then synchronization accuracy is improved, but device complexity increases
Solution Approach 1:
The patent extracts only the essential synchronization information (S-SyncInfo) for comparison purposes, rather than continuously monitoring and processing all synchronization parameters. This selective extraction approach maintains synchronization accuracy by comparing key identifiers while reducing the complexity of continuous comprehensive monitoring.
3Reliability
If a terminal device waits for random duration before synchronizing, then synchronization source switching is reduced, but synchronization response time increases
Solution Approach 1:
The terminal device performs preliminary comparison of synchronization information before synchronization to determine whether synchronization is actually needed. This preliminary check eliminates unnecessary waiting periods, as the device only waits for random duration when synchronization is required, thereby reducing synchronization delay while maintaining stability by avoiding redundant synchronization source switching.
Data Source
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Figure 5A~5B
AI summary
This application provides a method, an apparatus, and a system for signal synchronization. The method for signal synchronization includes: A self-synchronizing first terminal device broadcasts first synchronization information; determines whether the first terminal device and a second terminal device have implemented signal synchronization when receiving second synchronization information sent by the second terminal device; and determines, based on a determining result, whether to synchronize to the second terminal device. This reduces a probability of communication interruption caused by synchronization source switching by the first terminal device after the second terminal device performs synchronization by using the first terminal device as a synchronization source. The method for signal synchronization may be applied to scenarios such as the intelligent driving, intelligent connected vehicles, and Internet of Vehicles.