A nanosecond time synchronization method and implementation device between fixed network nodes

Abstract

The present invention provides a method and implementation device for nanosecond-level time synchronization between fixed network nodes. A local clock reference tamed to satellite time is established in a fixed network time-frequency synchronization device. The satellite common view method is used to estimate the time difference between the local clocks of the slave station and the master station. Then, the phase-level time control method is used to adjust the slave station time so that it is synchronized with the master station time, and finally the whole network time synchronization covering a range of 500 kilometers is achieved. The present invention realizes real-time high-precision time synchronization of two remote nodes, the slave station and the master station, thereby realizing the time synchronization of the entire fixed network, with an accuracy of up to 5ns. The device composition is simple and practical, suitable for engineering applications in field environments, and realizes the time synchronization and following of the slave station and the master station in the network node, so that the entire network time is consistent, solving the real-time and practicality required for actual engineering applications, and achieving the nanosecond-level time synchronization accuracy of the slave station and the master station.

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