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1588 protocol-based beidou time synchronization device and application thereof

A technology of time synchronization device and Beidou clock, applied in synchronization devices, measuring devices, instruments, etc., can solve the problem of time synchronization technology development lag and other problems, and achieve the effect of facilitating development/debugging, improving clock accuracy, and reducing coupling.

Active Publication Date: 2011-04-13
郑州威科姆科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, most network time-frequency synchronization products in the industry use GPS time source and NTP time synchronization technology. At present, there is no mature IEEE 1588 clock synchronization solution using Beidou time source. Compared with the rapid development of the domestic information industry, Beidou has high-precision The development of network time synchronization technology has lagged behind relatively, and it has become a technical bottleneck to be solved urgently in the development of Beidou time-frequency synchronization technology

Method used

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  • 1588 protocol-based beidou time synchronization device and application thereof
  • 1588 protocol-based beidou time synchronization device and application thereof
  • 1588 protocol-based beidou time synchronization device and application thereof

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Embodiment 1

[0042] Such as figure 1 Shown, the present invention adopts high-performance embedded microprocessor and the IEEE 1588 hardware solution that realizes at Ethernet physical interface layer, cooperates IEEE 1588 protocol stack software system, realizes complete IEEE 1588 solution; Through UART and 1PPS interface, receive The 1PPS / TOD time stamp information of the Beidou satellite clock source, and the configuration / query management operations of the Beidou clock source through the serial port command frame, to realize the Beidou satellite clock source interface.

[0043] The details of each functional module are as follows:

[0044] (1) Beidou clock source: Beidou clock source provides three signals, namely Beidou 1PPS / TOD time scale information and clock signal, and the output clock signal is used as the external reference clock source of IEEE1588 hardware unit to ensure that IEEE1588 hardware clock and Beidou clock The frequency / phase synchronization of the source improves th...

Embodiment 2

[0087] The difference between this embodiment and Embodiment 1 is that, on the basis of Embodiment 1, this embodiment uses the IEEE1588 clock synchronization device as the master clock and slave clock of the IEEE1588 time synchronization network at the same time, and its structure is as follows Figure 10 shown. Among them, the Beidou clock source communicates with the 1588 master clock, and the 1588 master clock communicates with the 1588 slave clock through a packet switching network, such as using Ethernet communication, and finally the 1588 slave clock outputs TOD / 1PPS information. When the clock synchronization device is used as the IEEE 1588 slave clock, it can synchronize the local clock to the master clock through the network, and restore the 1PPS and TOD time stamp output for devices that do not support IEEE 1588 to synchronize the clock. Among them, the process of synchronizing the 1588 master clock with the 1588 slave clock through the 1588 protocol is as follows: ...

Embodiment 3

[0097] The difference between this embodiment and Embodiment 1 is that in this embodiment, the IEEE1588 hardware unit is implemented on the Ethernet MAC layer, and its implementation

[0098] Other technical schemes are identical with embodiment 1.

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Abstract

The invention discloses a 1588 protocol-based beidou time synchronization device. A beidou clock source provides beidou 1PPS / TOD time scale information and a clock signal, and the output clock signal is used as an external reference clock source of an institute of electrical and electronic engineers (IEEE) 1588 hardware unit; an embedded microprocessor receives the 1PPS / TOD time scale information of the beidou clock source, performs clock adjustment on the IEEE1588 hardware unit and reads a time stamp; an IEEE1588 message is transmitted and received, and IEEE1588 network time service is provided; the IEEE1588 hardware unit provides an external reference clock source input interface, generates the IEEE1588 time stamp and the time information of the 1588 hardware clock according to the received external reference clock source, processes the IEEE1588 message and finally restores the IEEE1588 hardware clock to be 1PPS signal to be output; and an IEEE1588 protocol stack software system comprises IEEE1588 protocol stack software, a beidou clock source interface and an IEEE1588 hardware unit driving module.

Description

technical field [0001] The invention relates to a time synchronization device, in particular to a Beidou distributed system time synchronization device based on the IEEE 1588 protocol. Background technique [0002] my country's Beidou satellite positioning and navigation system is the third satellite positioning and navigation system in the world after GPS and GLONASS, and its timing performance is better than that of GPS. In many key industries and application fields such as communications and electric power, the time-frequency synchronization system using the Beidou satellite system as the time source has the irreplaceable advantage of the GPS system. The time-frequency synchronization technology using the Beidou satellite time source has become the time synchronization of many industries Network technical standards. [0003] With the rapid development of information technology based on network technology, various services based on network technology have higher and highe...

Claims

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Application Information

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IPC IPC(8): H04L7/00G01S5/02H04L29/06
Inventor 贾小波吴淑琴杨光李波王文瑜
Owner 郑州威科姆科技股份有限公司
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