Synchronization and switching method and system for multiple two-out-two systems
A main system, synchronization pulse technology, applied in the field of electronic information, can solve the problems of unsuitable speed, transponder, inflexible switching, large synchronization interval, etc., to achieve the effect of reducing the number of cables, flexible switching, and high precision
Active Publication Date: 2018-09-04
TRAFFIC CONTROL TECH CO LTD
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Problems solved by technology
[0003] The synchronization of the existing systems is mostly periodic synchronization, and the synchronization interval is relatively large, which is not suitable for speed, transponder and other acquisition signals that require precise time
At the same time, the existing system synchronization master and backup system switching is inflexible and inefficient
Method used
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[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.
[0032] A method for synchronizing and switching multiple 2-out-2 systems, such as figure 1 As shown, the method includes the following steps:
[0033] After a two-for-two system goes online, it is judged whether there is a main system. When there is a main system, the two-for-two system is upgraded to a backup system and receives the synchronization pulse sent by the main system; when there is no main system exists, The 2 out of 2 system is upgraded to a master system to provide synchronization pulses, wherein the master system is one of the multiple 2 out of 2 systems;
[0034] More than one of the 2 out of 2 systems is online at the same time, judging whether there is a master system at present, and when ...
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The invention provides a synchronization and switching method and system for multiple two-out-of-two systems. The method provided by the present invention comprises: after a two-out-of-two system goes online, determining whether a primary system exists, and if the primary system exists, upgrading the two-out-of-two system to a standby system to receive a synchronous pulse sent by the primary system; if the primary system does not exist, upgrading the two-out-of-two system to the primary system to provide the synchronous pulse, wherein the primary system is one of the multiple two-out-of-two systems; and when more than one two-out-of-two system go online simultaneously, determining whether the primary system exists currently, when the primary system does not exist and the more than one two-out-of-two system send the synchronous pulses simultaneously, detecting widths of the multiple sent synchronous pulses, and selecting the two-out-of-two system corresponding to the synchronous pulse with the largest width, and upgrading the two-out-of-two system to the primary system and upgrading the other two-out-of-two systems to the standby systems. The processing manner above implements more reliable and more accurate synchronization, and also implements flexible switching of primary and standby devices.
Description
technical field [0001] The invention belongs to the technical field of electronic information, and more specifically relates to a method and system for synchronizing and switching two out of two systems. Background technique [0002] With the development of electronic information technology, in the field of security control, security computer systems are currently widely used to achieve safe and reliable transmission and processing of data. Common secure computer system architectures include two out of two, three out of two, two times two out of two, and the two out of two system is widely used because of its better security control performance. The synchronization between the two systems and the switching between the two systems are the core factors of the two-by-two system, so a reasonable and reliable two-by-two system synchronization and master-standby switching method is particularly important . Synchronization methods include hardware synchronization and software syn...
Claims
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IPC IPC(8): G06F9/4401
CPCG06F9/441G06F21/74
Inventor 张强刘波
Owner TRAFFIC CONTROL TECH CO LTD