Multi-frequency-point frequency hopping communication method based on power line carriers

A power line carrier and frequency hopping communication technology, which is applied in distribution line transmission systems, electrical components, transmission systems, etc., can solve problems such as poor real-time communication effects, inability to use frequency points for real-time communication, and data transmission failures, etc., to improve communication Real-time, not easy to monitor and crack, improve the effect of anti-interference

Active Publication Date: 2019-05-14
HEXING ELECTRICAL +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3) Nodes and nodes use multiple frequency points to communicate at the same time. Although this scheme improves the communication rate, because the transmission data uses multiple frequency points to send data in parallel, when one or several frequency points are interfered, there will be Several data errors in a frame of data cause the data transmission of this frame to fail
[0004] The communication rate of the above-mentioned first and second schemes is low, and when the used frequency point is interfered, it will cause real-time communication and poor real-time performance
Although the above-mentioned third and fourth communication schemes increase the communication rate, once the communication frequency used is interfered, since the frequency used is fixed and the communication frequency will not jump within a certain period of time, it will still The phenomenon of poor real-time communication effect
[0005] Therefore, the single-frequency point communication scheme or multi-frequency point simultaneous transmission scheme used in large quantities at present can no longer meet the needs of users, and a communication method with high communication rate and good real-time communication performance is urgently needed

Method used

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  • Multi-frequency-point frequency hopping communication method based on power line carriers

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Experimental program
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Embodiment 1

[0041] The present invention is mainly aimed at the automatic frequency hopping communication method in the communication process of the multi-frequency point carrier communication scheme, comprising the following steps:

[0042] A. Scan all frequency points between two nodes to obtain the optimal communication frequency between the two nodes, and set the life cycle of the communication channel; the life cycle of the communication channel is set according to the size of the network. In the network, the life cycle of the communication channel can be set to 15 minutes; in a network of 100 nodes, the life cycle of the communication channel can be set to 7 minutes;

[0043] B. Determine whether the life cycle is over, if not, use the optimal communication frequency point for communication between the two nodes; otherwise, go to step A;

[0044] C. During the life cycle, if the two nodes fail to communicate at the optimal communication frequency point, go to step D; otherwise, go t...

Embodiment 2

[0055] This example is the implementation of CELENEC A band:

[0056] 1) Select 36 frequency points in this frequency band (CELENEC A frequency band). Nodes and nodes use full-frequency point channel scanning during the first communication, and record the addresses of each other's nodes and several communication frequency points with the highest signal strength values. As the optimal frequency point, specifically:

[0057] After the node receives the request beacon or response beacon, it obtains the signal-to-noise ratio SNR value of all communication frequency points. The SNR value is divided into 3 segments: excellent, good, and poor. For example, the SNR value ranges from 80db to 0db, and the excellent value is 50db ~80db, good is 20~49db, and difference is 0~19db; if the number of frequency points with SNR values ​​ranging from 50db to 80db is greater than or equal to 6, select all frequency points with SNR values ​​ranging from 50db to 80db as the optimal communication F...

Embodiment 3

[0063] This embodiment is an FCC band implementation scheme, which is basically the same as Embodiment 2, except that 72 frequency points are selected in this frequency band, and 1 / 3 of all frequency points are 24 frequency points.

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Abstract

The invention provides a multi-frequency-point frequency hopping communication method based on a power line carrier, which has the advantages of high communication rate, strong real-time performance and strong anti-interference performance, and comprises the following steps of: A, carrying out full-frequency-point channel scanning to obtain an optimal communication frequency point; B, adopting anoptimal communication frequency point for communication; C, if failure occurs, turning to D; Otherwise, turning to B; D, carrying out communication by using the one third frequency point with the lowest frequency in all frequency points, and if the communication fails, turning to E; Otherwise, turning to B; E, carrying out communication by using 1 / 3 frequency points with frequencies in the middlein all the frequency points, and if the communication fails, turning to the step F; Otherwise, turning to B; F, carrying out communication by using one third frequency point with the highest frequencyin all frequency points, and if the communication is successful, turning to B; Otherwise, B, C, D, E and F are executed in sequence, and if the two rounds fail, the data transmission is abandoned.

Description

technical field [0001] The invention relates to a multi-frequency point frequency hopping communication method based on a power line carrier, which is mainly used in the field of electricity consumption information collection. Background technique [0002] Power line carrier communication is used in large quantities in the field of power consumption information. With the development of science and technology, real-time carrier communication and big data collection and analysis have become an urgent need. [0003] The current mainstream communication schemes include: 1) Nodes use a single frequency point for communication. The design of this scheme is simple and the cost is low. However, when the frequency point used by this scheme is interfered, real-time communication will not be possible. 2) The master node can support multi-frequency points for communication, and use a single frequency point to try to communicate with the slave node. Once the communication is successful, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7136H04B1/715H04B3/54
Inventor 赵小进刘光跃王刚王智张建超周智伟陈云波
Owner HEXING ELECTRICAL
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