High precision clock synchronization method, module, equipment and system for timing system

A high-precision clock and timing system technology, applied in the fields of high-precision clock synchronization methods, modules, equipment and systems, can solve problems such as multi-level time difference accumulation, limited PTP timing accuracy, and time deviation

Active Publication Date: 2016-11-16
广州市泰斗智慧科技有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of limited accuracy of existing PTP timing, time deviation introduced by asymmetry and multi-level time difference accumulation

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  • High precision clock synchronization method, module, equipment and system for timing system
  • High precision clock synchronization method, module, equipment and system for timing system
  • High precision clock synchronization method, module, equipment and system for timing system

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Embodiment Construction

[0064] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0065] The present invention provides a high-precision clock synchronization method for a time service system to solve the problems of limited time service accuracy, asymmetrically introduced time deviation and multi-level cascade introduced time difference accumulation in the existing PTP protocol-based time service method. figure 1 It is a system block diagram of the first embodiment of the present invention. The timing system includes a master end and a slave end. The master end and the slave end communicate and exchange network data with time stamps through the PHY interface control unit. The master end includes a master end satellite Receiver, master local frequency source, master time difference measurement and master PHY interface control unit, slave includes slave satellite receiver, slave local frequency sour...

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Abstract

The invention relates to the technical field of timing, and specially relates to a high precision clock synchronization method for a timing system. The purpose is to solve the problems that the PTP (Precision Timing Protocol) timing precision is limited, and asymmetry introduces time deviation and multi-stage time difference accumulation. The high precision clock synchronization method comprises a master and a salve, wherein when a network is normal, the master and the slave measure an accurate clock skew and a clock delay through a timing method based on a PTP, slave time is corrected and satellite common-view is used to correct slave PTP time, thereby eliminating the effect of the asymmetry on the slave time synchronization; and when the network is abnormal, the master and the slave adopt the satellite common-view to perform time synchronization, thereby improving the synchronization precision of the slave and the master, and meanwhile, guaranteeing the time synchronization stability and accuracy of the slave and the master.

Description

technical field [0001] The invention relates to the technical field of time service, in particular to a high-precision clock synchronization method, module, device and system for a time service system. Background technique [0002] IEEE 1588 PTP protocol, the full name is "IEEE 1588 Precision Clock Synchronization Protocol for network measurement and control systems (IEEE 1588 Precision Clock Synchronization Protocol)", referred to as PTP (PrecisionTiming Protocol), with easy configuration, fast convergence and less consumption of network bandwidth and resources Features. The main principle of PTP is to periodically correct and synchronize the clocks of all nodes in the network through a synchronization signal, which can make the distributed system based on Ethernet achieve accurate synchronization. The basic principle of synchronization includes the recording of time sending and receiving time information, and adding a "time stamp" to each piece of information. With the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
CPCH04J3/0667
Inventor 李宗安朱敏刘文锋张乐健梁明杜海波
Owner 广州市泰斗智慧科技有限公司
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