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Hot backup redundancy computer time synchronization system and method thereof

A time synchronization system and computer technology, applied in transmission systems, synchronization devices, digital transmission systems, etc., can solve problems such as out-of-sync, achieve the effect of simple implementation, reduce hardware overhead, and improve synchronization

Active Publication Date: 2014-03-26
BEIJING INST OF CONTROL ENG
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method relies on the high-precision timing source provided by the outside, which not only increases the timing circuit of the external fault-tolerant backup, but also causes the hot backup multiple machines to lose synchronization due to time differences when the external timing source is switched or fails.

Method used

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  • Hot backup redundancy computer time synchronization system and method thereof
  • Hot backup redundancy computer time synchronization system and method thereof
  • Hot backup redundancy computer time synchronization system and method thereof

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Embodiment Construction

[0019] The present invention will be further introduced below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the hot backup redundant computer time synchronization system of the present invention includes a time monitoring module, a master time stamp communication calculation module and a slave time stamp communication calculation module; the hot backup redundant computer includes more than two computers, and each computer is in the process of loading and unloading. In the power state, one of the computers is the master computer, and the other computers are slave computers. Each computer has a master time stamp communication calculation module and a slave time stamp communication calculation module; the corresponding time stamp communication calculation module is started by converting the control signal from the master to the slave; The main timestamp communication calculation module. The computer can be realized by a large-scale programma...

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Abstract

The invention discloses a hot backup redundancy computer time synchronization system and a method thereof. The system comprises a time monitoring module, a primary timestamp communication calculation module and a secondary timestamp communication calculation module. A primary computer sends a synchronization message to a secondary computer. The synchronization message contains transmission time T1. The time monitoring module monitors whether the transmission time T1 is correct. When the transmission time is correct, the secondary computer receives the synchronization message. After recording the time Ti of receiving the synchronization message, the secondary computer simultaneously sends a response message to the primary computer. The primary computer records the time Ti' of receiving the response message and sends the time Ti' to the secondary computer. The secondary computer calculates time deviation according to T1, Ti and Ti'. The secondary computer corrects the local time based on the time deviation. When the transmission time is not correct, the current primary computer is switched to the secondary computer, and other computer is switched to a primary computer. The method provided by the invention is simple to implement. By the adoption of the system and the method, costs of external independent redundant timing hardware are minimized.

Description

technical field [0001] The invention relates to a time synchronization system and method for a hot standby redundant computer. Background technique [0002] In order to improve the reliability, the control computer of the satellite usually adopts the way of hot backup of three computers to complete the work. In order to keep the time synchronization of the three computers, a unified clock source is usually provided externally to keep the time of the three computers consistent. This method relies on the high-precision timing source provided by the outside, which not only increases the timing circuit of the external fault-tolerant backup, but also causes the out-of-synchronization between the hot backup multiple machines due to the time difference when the external timing source is switched or fails. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a hot backup redundant computer time synchronization system and met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00
Inventor 冯丹董暘暘胡洪凯刘波江耿丰张洪华何健
Owner BEIJING INST OF CONTROL ENG
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