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Multi-node Synchronous Sampling and Data Transmission Method in Ring Communication Network

A data transmission method and ring communication technology, applied in the field of multi-node synchronous sampling and data transmission, to achieve the effects of eliminating crystal aging, saving network bandwidth, and fixing transmission delay

Active Publication Date: 2021-07-30
NANJING PANENG TECHNOLOGY DEVELOPMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In order to overcome the deficiencies in the prior art, the present invention proposes a multi-node synchronous sampling and data transmission method in a ring communication network, which solves the problem of physical link length between multiple acquisition control nodes connected through the ring network with different physical distributions. and the technical issues of additional delay caused by the software protocol stack

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  • Multi-node Synchronous Sampling and Data Transmission Method in Ring Communication Network

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Embodiment 1

[0131] The basic technical idea of ​​synchronous sampling in the present invention is: first, each control node in the ring communication network (referred to as the ring network) determines the master node through election, and the transmission between adjacent nodes is obtained by point-to-point delay measurement between each control node. Delay, and then under the control of the timer, the master node first starts the local real-time data collection and publishes the real-time data message containing the delay correction time, and other control nodes in the system extract the delay correction time and delay measurement in the real-time data message of the master node information, generate network synchronization signals, and then use the digital phase-locked loop to gradually synchronize to the master node to complete the system synchronization, and generate local synchronous sampling reference signals to control data acquisition. Further, the independent acquisition equipmen...

Embodiment 2

[0242] In the following, specific implementation solutions of the present invention will be further described in terms of communication system configuration, control node structure, gateway node structure, system-level synchronization, frame encapsulation and forwarding, and link management in conjunction with implementation examples.

[0243] 1. System structure

[0244] attached figure 1 Shows the structure of the data communication system based on the complete ring network of the present invention. The entire data collection and transmission system consists of a data processing device on the first layer, a control node connected to a ring communication network on the second layer, and a data processing device on the third layer. The acquisition control terminal constitutes. attached figure 2 Shows a line network (Line network) structure diagram, if the control node 1 and control node 6 network ports located at both ends of the line network in the figure are connected, th...

Embodiment 3

[0292] attached Figure 4 It is a simplified implementation case of the present invention applied to a local area network. In the simplified case, the gateway node is cut out, and the data acquisition control terminal attached to the third layer is cut out. Furthermore, due to the short transmission time between nodes, the point-to-point delay measurement can be tailored. In the application scenario of manually specifying the master node, even the aforementioned master node election process can also be tailored.

[0293] In the simplified implementation case of the present invention, the local real-time data acquisition is completed by the built-in synchronous data acquisition module of the control node, and the internal application business processing module merges and processes the real-time data on the network and the real-time data collected locally, and implements related control output.

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Abstract

The invention discloses a multi-node synchronous sampling and data transmission method in a ring communication network. The master node generates a synchronization pulse AD_CVT and a transmission trigger pulse TX_SYN consistent with the system sampling interval Ts, and at the same time the master node completes local real-time data under the control of AD_CVT Collect and complete data transmission under the trigger of the TX_SYN signal; at the same time, each control node divides the physical channel into real-time and non-real-time logical channels, classifies the real-time sampling data service into the real-time logical channel for transmission, and transmits the real-time sampling data through the interleaved Extract and send from two different directions of the ring network, classify non-real-time data into non-real-time logical channel transmission. The method of the invention realizes the synchronous sampling and synchronous data transmission of each control node in the ring network, and improves the efficiency of data sampling and the real-time performance of data transmission.

Description

technical field [0001] The invention relates to the technical field of power system automation and industrial control, in particular to a multi-node synchronous sampling and data transmission method in a ring communication network. Background technique [0002] In the field of power system wide-area protection and wide-area process control, in order to accurately retain the phase information of the signal, or perform precise timing analysis on asynchronous events, it is necessary to collect a certain group of process variables at different locations and at equal intervals. In order to improve the real-time processing capability of the system and the response speed of asynchronous events, the sampling data of each process quantity acquisition and control device can be uploaded in real time, and the command setting information of the processing device needs to be sent to the actuator or adjustment mechanism in real time. [0003] For wide-area measurement and control systems, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/42H04L12/26H04L29/06
CPCH04L12/422H04L43/06H04L43/0852H04L63/0236H04L2212/00
Inventor 庞吉耀
Owner NANJING PANENG TECHNOLOGY DEVELOPMENT CO LTD
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