A Construction Method of High Precision Time Synchronization System Based on IP Network

Abstract

The invention discloses a time synchronization method which is mainly a multi-center star-shaped topological time synchronization system construction method. The construction method comprises a network high-precision timing system protocol, a clock state machine and a time resource vote algorithm. A time synchronization system consists of a regional resource management center and a plurality of high-precision synchronization time domains. On the basis of the network high-precision timing system protocol, the management center acquires clock quality, locally estimates a clock synchronization and runs the time resource vote algorithm so as to form a time synchronization topology; the time resource vote is a core algorithm in a time synchronization system construction process; a working mode of a clock is calculated by comparing the time quality of the clock with the position quality, and then a clock resource is scheduled, so that a reasonable system clock synchronization relation is obtained. According to the construction method, the reasonable system clock synchronization relation is obtained by repeatedly scheduling the time resource vote algorithm, so that construction of the time synchronization system is implemented.

Description

technical field [0001] The invention belongs to the technical field of computer network time synchronization, in particular to a method for constructing a high-precision time synchronization system based on an IP network. Background technique [0002] Time synchronization is the process of limiting the time deviation maintained by various communication devices or computer devices on the network to a certain range. The current time synchronization technology is classified according to wired and wireless methods, mainly including wired network time synchronization and satellite link time synchronization. [0003] 1. Wired network time synchronization [0004] Wired network time synchronization is based on terrestrial wired links (such as IP bearer network, SDH, PDH network, etc.), through the application layer time synchronization protocol to achieve time synchronization. Now the main commercial time synchronization protocols include NTP, PTP, etc. These protocols have their...

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Problems solved by technology

[0012] However, taking GPS as an example, it is a global positioning system developed by the United States. If you rely solely on GPS, there will be political and security risks

Even for the Beidou system, if a war breaks out, it is difficult to guarantee the normal use of wireless satellite signals, which will bring unstable factors to the security and reliability of the network

Moreover, the satellite timing system has defects such as individual differences in receivers, and the signal is easily affected by the weather, resulting in large differences in synchronization accuracy between different nodes

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