基于异构多核系统的时间同步方法、装置及片上系统
By employing bidirectional message interaction with hardware timestamps and a precise time protocol in a heterogeneous multi-core system, sub-microsecond-level time synchronization is achieved, solving the problems of insufficient synchronization accuracy and high hardware cost in existing technologies. It is suitable for highly integrated SoC architectures and meets the needs of advanced autonomous driving.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING YUNCHI FUTURE TECH CO LTD
- Filing Date
- 2025-12-25
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies struggle to achieve sub-microsecond level high-precision time synchronization in heterogeneous multi-core on-chip systems. Furthermore, existing solutions suffer from insufficient synchronization accuracy, high hardware costs, and significant integration challenges, failing to meet the demands of advanced autonomous driving.
By using bidirectional message exchange with hardware timestamps in a heterogeneous multi-core system, synchronization time parameters, including basic time deviation, reference synchronization timestamp, and frequency ratio, are obtained. By utilizing the bidirectional measurement mechanism of the precision time protocol and combining it with hardware counters to directly read the timestamp, sub-microsecond time synchronization between cores is achieved.
It achieves sub-microsecond time synchronization accuracy at the pure software level, reduces hardware costs and integration complexity, adapts to highly integrated SoC architectures, provides a reliable time reference, and solves the time consistency requirements of L3 and above autonomous driving systems.
Smart Images
Figure CN121807103B_ABST