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A clock synchronization path query method and system based on ring network

A clock synchronization, ring network technology, applied in the direction of ring network, time division multiplexing system, transmission system, etc., to achieve the effect of increasing the fault tolerance rate and improving the accuracy of clock synchronization

Active Publication Date: 2021-10-22
浙江杰芯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above technical solution, when a new device comes online, other devices in the ring network need to recalculate the line delay

Method used

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  • A clock synchronization path query method and system based on ring network
  • A clock synchronization path query method and system based on ring network
  • A clock synchronization path query method and system based on ring network

Examples

Experimental program
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Effect test

no. 1 example

[0052] Such as figure 2 As shown, it is a specific flowchart of a clock synchronization path query method based on a ring network of the present invention, and it includes:

[0053] S1: According to the position of the slave clock device relative to the master clock device in the ring network, and at the same time according to the message forwarding path from the port of the master clock device to the port of the slave clock device, for each clock device in the ring network Each port of a slave clock device is preset with a corresponding device port number, wherein both the master clock device and the slave clock device have multiple ports, and there are several message forwarding paths.

[0054] Specifically, in this embodiment, the ring network formed by the interconnection of the master clock device and the slave clock devices, such as image 3 As shown, and the communication complies with the relevant regulations of real-time Ethernet communication. Each master clock de...

no. 2 example

[0072] Such as Figure 8 As shown, it is a structural diagram of a clock synchronization path query system based on a ring network in the present invention, which includes: a port number preset module 1, a message sending module 2, and a synchronization path acquisition module 3;

[0073] The port number preset module 1 is configured to, according to the position of the slave clock device relative to the master clock device in the ring network, and at the same time according to the message forwarding path from the port of the master clock device to the port of the slave clock device, For each port of each slave clock device in the ring network, a corresponding device port sequence number is preset, wherein the master clock device and the slave clock device each have multiple ports, and the report There are several document forwarding paths;

[0074] The message sending module 2 is configured to provide the master clock device to periodically send a clock synchronization path ...

no. 3 example

[0080] It is basically the same as the second embodiment, the difference is that this embodiment integrates the clock synchronization path query system based on the ring network into the real-time Ethernet communication system in the form of modules. The real-time Ethernet communication system can be a software system based on CPU or a system on chip based on FPGA or SOC. In this embodiment, the real-time Ethernet communication system is developed based on FPGA, such as Figure 9 As shown, the system also includes CPU module, AXI bus, storage module and so on.

[0081] The functions of each module of the real-time Ethernet communication system are as follows:

[0082] (1) CPU: configure and manage the real-time Ethernet communication module, and process application layer data;

[0083] (2) Memory: store configuration information and real-time Ethernet communication data;

[0084] (3) Real-time Ethernet communication module: transmission of communication data, clock synchron...

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Abstract

The present invention relates to the technical field of clock synchronization path query, and provides a clock synchronization path query method and system based on a ring network. The method includes: S1: for each port of a slave clock device, preset the serial number of the device port; S2: master clock device Send the clock synchronization path management message from all ports along the message forwarding path, and return to the master clock device after a cycle of transmission in the ring network; S3: The slave clock device receives the clock synchronization path management message from each port, and transfers the clock The forwarding port serial number in the synchronization path management message is compared with the device port serial number of the receiving port of the slave clock device. If the forwarding port serial number is the previous serial number of the device port serial number, the synchronization path has not changed, and the current packet forwarding path is used as Clock synchronization path from the clock device. The slave clock device receives periodic synchronization packets from the clock synchronization path to perform periodic clock synchronization without recalculating the line delay.

Description

technical field [0001] The invention relates to the technical field of clock synchronization path query, in particular to a clock synchronization path query method and system based on a ring network, which has a hardware bypass function and is suitable for real-time Ethernet controlled by a ring network control system. Background technique [0002] At present, most of the clock synchronization methods of real-time industrial Ethernet technology adopt IEEE 1588 precise clock synchronization mechanism. In order to meet the diversity of application scenarios and improve the reliability of real-time ring network, the present invention is based on the existing real-time Basically, it focuses on solving the problem of how to query the correct clock synchronization path for periodic clock synchronization from the clock device when the clock synchronization path changes in the ring network, so as to improve the clock synchronization accuracy of the network and the self-repair capabil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/42H04J3/06
CPCH04J3/0644H04J3/0661H04L12/42H04L12/422
Inventor 唐艳丽郑慧娴周海敏何超曹焱朱林
Owner 浙江杰芯科技有限公司
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