System time synchronization method under hybrid channel communication condition

Abstract

The invention discloses a system time synchronization method under a mixed channel communication condition. The system time synchronization method comprises the following steps: a message format of atime synchronization message is designed;a request end system initializes a message, sets a first moment ST1 in the message, selects a communication link and sends the message to the receiving end system through the communication link; after a receiving end system receives the message, a communication link characteristic value is set according to the communication link, and a second moment ST2 inthe message is set; a communication link is selected according to the characteristic value of the communication link, a third moment ST3 in the message is set and the third moment ST3 is sent to the request end system through the communication link; the request end system receives the message and sets a fourth moment ST4 in the time synchronization message; and system time difference is calculatedaccording to the four moments in the message, and the system time of the request end system is corrected. By adopting the method, the time synchronization between the systems can be realized, the problem that the system time is difficult to synchronize with high precision under the mixed channel communication condition is solved, and the accuracy of the command information system is improved.

Description

technical field [0001] The invention relates to the technical field of command information systems, in particular to a system time synchronization method under mixed channel communication conditions. Background technique [0002] In command information systems, system time and astronomical time are often used simultaneously. Wherein, the astronomical time is the actual time course, specifically, it may be the time displayed by the wall clock. The system time is not the actual time process. Specifically, it can be a time standard set by the highest-level system in the command information system for the global interconnection system, which can be set and adjusted according to tasks or plans. In addition, unlike in the simulation training and simulation system, the adjustment of time includes the pause, continuation and adjustment of the time step. In the command information system, the adjustment of time is limited to the setting of the time value. [0003] Because the essen...

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Problems solved by technology

[0005] The present invention provides a system time synchronization method under mixed channel communication conditions to solve the problem that most of the existing time synchronization methods are adjustments to astronomical time, and it is difficult to realize high-precision time synchronization for command information systems under mixed channel communication conditions The problem

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