A method and system for time synchronization of a vehicle-mounted terminal

Abstract

The invention discloses a vehicle-mounted terminal time synchronization method and system, including obtaining the system time generated by a timing module; obtaining the time source time and judging the validity of the time source time; if the time source time is valid, setting the time source time to The source time is used as the synchronization time. On the contrary, the system time is used as the synchronization time to solve the problem that in some special cases, such as cloudy, rainy and snowy weather or vehicles entering and leaving the tunnel, there may be poor data communication and incorrect time information. The technology cannot judge the lack of time validity of positioning satellites or Internet servers, and improve the stability of vehicle system data communication and the safety of vehicle driving.

Description

technical field [0001] Embodiments of the present disclosure relate to the technical field of Internet of Vehicles communication, and in particular, to a time synchronization method and system for a vehicle-mounted terminal. Background technique [0002] With the rapid development of in-vehicle network communication technology, more and more systems such as entertainment systems and intelligent driving systems are used in vehicles. Most of these systems need real-time data transmission with Internet servers or satellites. The requirements for time synchronization of servers or satellite positioning systems are getting higher and higher. [0003] In the prior art, the time source time of the satellite positioning system or the Internet server is usually obtained at the same time as the data transmission between the vehicle-mounted terminal and the satellite positioning system or the Internet server, and is used to update the system time of the vehicle-mounted terminal, thereb...

AI Technical Summary

Problems solved by technology

Because in some special environments, such as cloudy, rainy and snowy weather or when vehicles enter and exit tunnels, data communication may not be smooth and time information may be incorrectly obtained, and the existing time synchronization methods cannot judge the location of satellite positioning systems or Internet servers. Insufficient validity of the time source time. In extreme cases, synchronizing the invalid time source time with the vehicle system time may cause data communication failure or affect the vehicle intelligent driving system, resulting in potential safety hazards

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