IEEE 1588-based synchronization system and synchronization method thereof

A technology for synchronizing systems and synchronizing messages, which is applied in the direction of transmission systems, synchronization devices, digital transmission systems, etc., can solve the problems of reducing synchronization accuracy and not considering the machine accuracy of embedded systems, and achieve the effect of high clock synchronization accuracy

Active Publication Date: 2011-06-22
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, the proposed frequency compensation method does not consider the limited machine precision of the embedded system, that is, the impac

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  • IEEE 1588-based synchronization system and synchronization method thereof
  • IEEE 1588-based synchronization system and synchronization method thereof
  • IEEE 1588-based synchronization system and synchronization method thereof

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Embodiment Construction

[0027] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0028] This embodiment includes: a master device and a slave device connected through a network, wherein: the master device includes a master clock module and a CPU management control module, and the slave device includes a slave clock module and a CPU management control module.

[0029] The main clock module is composed of a clock timer and a crystal oscillator, wherein: the clock counter realizes the output of the local system time and increases the system time by the value of one clock cycle when triggered, and the crystal oscillator is used to generate the module's work The clock is output to the CPU management...

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Abstract

The invention discloses an IEEE 1588 accurate clock synchronization protocol-based synchronization system and a synchronization method thereof in the technical field of wireless communication. The system consists of master equipment and slave equipment which are connected through a network, wherein the master equipment comprises a main clock module and a central processing unit (CPU) management control module; and the slave equipment comprises a slave clock module and a CPU management control module. Due to the adoption of a frequency compensation clock provided by Balasubramanian and the like, a frequency adjustable clock counter is constructed and the frequency compensation function is realized; and an improved clock synchronization method is adopted, the limited machine precision of anembedded system, namely influence brought by truncation errors is considered; therefore, higher clock synchronization accuracy is achieved.

Description

technical field [0001] The present invention relates to a device and method in the technical field of wireless communication, in particular to a synchronization system and a synchronization method based on the IEEE 1588 precise clock synchronization protocol. Background technique [0002] In recent years, due to its openness, mature technology, high transmission rate, wide application and low price, Ethernet has received more and more attention, and has a tendency to be further applied to industrial sites. However, because its MAC layer protocol adopts CSMA / CD, it has the defect of uncertain queuing delay, which makes it unable to be effectively used in industrial control. The "uncertainty" of response time (that is, poor real-time performance) and the "asynchrony" of each module in the system have become the bottlenecks that hinder the "one network to the end" of Ethernet technology. Among them: Some industrial sites require extremely high clock synchronization accuracy, w...

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Application Information

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IPC IPC(8): H04L7/00H04L12/56H04L29/06H04J3/06
Inventor 许雄熊振华朱向阳盛鑫军
Owner SHANGHAI JIAO TONG UNIV
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