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Circuit and method for acquiring and updating transparent clock

A technology of transparent clocks and circuits, applied in time division multiplexing systems, electrical components, multiplexing communications, etc. Accurate clock synchronization, the effect of improving the accuracy of the time system

Active Publication Date: 2018-10-19
BEIJING INST OF CONTROL ENG
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  • Abstract
  • Description
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Problems solved by technology

[0006] The technical problem solved by the present invention is: in view of the problem that the existing technology cannot update the transparent clock value of the synchronization message in time in the network equipment, the present invention proposes a circuit and method for obtaining and updating the transparent clock

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  • Circuit and method for acquiring and updating transparent clock
  • Circuit and method for acquiring and updating transparent clock
  • Circuit and method for acquiring and updating transparent clock

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Embodiment Construction

[0044] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] A circuit implementation of the present invention to obtain and update a transparent clock includes: MII interface monitoring module, arrival time stamp recording module, timer, MAC layer processing module, departure time stamp recording module, transparent clock calculation module, transparent clock update module and arrival Timestamp table and configuration parameter table. A key technology in time-triggered Ethernet is clock synchronization. Clock synchronization is to maintain the clock synchronization of distributed devices, and the transparent clock technology is one of the methods to achieve clock synchronization. The invention proposes a circuit implementation for the acquisition and update of the transparent clock. The invention has the advantages of being able to quickly obtain an accurate transparent clock, and can timely ...

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Abstract

Disclosed are a circuit and method for acquiring and updating a transparent clock. The circuit includes an MII interface monitoring module, an arrival timestamp recording module, a timer, an MAC layerprocessing module, a departure timestamp recording module, a transparent clock calculating module, a transparent clock updating module, an arrival timestamp table, and a configuration parameter table. Clock synchronization is one of key technologies in time-triggered Ethernet. The clock synchronization is to maintain the synchronization of clocks of distributed equipment, and the transparent clock technology is one of methods to achieve the clock synchronization. The invention provides a circuit realization method for acquiring and updating the transparent clock. The circuit and method have advantages of being able to quickly acquire a precise transparent clock and timely modify a transparent clock value in a synchronization message, and can provide a basic guarantee for high precision clock synchronization.

Description

technical field [0001] A circuit and method for obtaining and updating a transparent clock proposed by the present invention are mainly applied in time-triggered Ethernet and belong to the field of intelligent signal processing circuits. Background technique [0002] Time-triggered Ethernet is a new type of real-time Ethernet architecture. In this architecture, all communication actions are driven strictly according to the schedule. By designing the schedule, the entire network can be guaranteed to communicate without conflict, that is, all data packets will not occur. In the case of resource competition, it has the characteristics of strong real-time and low delay jitter. These characteristics make time-triggered Ethernet very suitable for systems with strict real-time requirements such as industrial control, aerospace, automotive electronics, and robots. At the same time, time-triggered Ethernet has the advantages of high bandwidth and easy expansion of traditional Ethern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
CPCH04J3/0638H04J3/0682
Inventor 蔺玥范松涛韩银和高亚楠于丹周远林
Owner BEIJING INST OF CONTROL ENG
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