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Adaptive Firewall System for Power Line Carrier Communication

A power line carrier and self-adaptive technology, applied in the direction of distribution line transmission system, transmission system, digital transmission system, etc., can solve the problems of easy eavesdropping, poor confidentiality, and no protective measures for signal demodulation, so as to improve security, The effect of ensuring security and reducing resource overhead

Active Publication Date: 2022-03-25
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the existing power line carrier communication has poor confidentiality, there is no protective measure in the signal demodulation process, and it is easy to be eavesdropped, and an adaptive firewall system for power line carrier communication is proposed

Method used

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  • Adaptive Firewall System for Power Line Carrier Communication
  • Adaptive Firewall System for Power Line Carrier Communication
  • Adaptive Firewall System for Power Line Carrier Communication

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specific Embodiment approach 1

[0050] Specific implementation mode one: the following combination figure 1 and figure 2 This embodiment is described. An adaptive firewall system based on power line carrier communication described in this embodiment includes a branch adjustment structure 1, a fuzzy controller 4 and an intelligent controller 3;

[0051] The branch regulating structure 1 includes a plurality of branch wires, one end of the plurality of branch wires is respectively connected to the power cable 2 through a relay, and the other end is suspended in the air, and the plurality of branch wires are arranged adjacent to the signal receiving end of the power cable 2;

[0052] The fuzzy controller 4 obtains the communication frequency band f of the current channel through the receiving end modem 3 s and fixed-point cancellation band f m , calculate the channel reward deviation and its rate of change, establish the universe of discourse according to the reward deviation and its rate of change, and obta...

specific Embodiment approach 2

[0056] Specific embodiment two, combine figure 2 This embodiment is described. This embodiment is a further limitation of the adaptive firewall system for power line carrier communication described in Embodiment 1. The process of adaptively adjusting the signal of power line carrier communication is as follows:

[0057] Step 1. Initialize branch control switch function Q=[q 1 ,q 2 ,...q n ];

[0058] Step 2. Obtain the current channel communication frequency band f s and fixed-point cancellation band f m ;

[0059] Step 3, according to the current branch control switch function Q=[q 1 ,q 2 ,...q n ], to obtain the path network topology map of the signal near the receiving end;

[0060] Step 4, using the path network topology diagram of the signal near the receiving end, combined with the reflection and refraction of the signal at the branch point of the power line, to obtain the total number of paths of the multipath trajectory of the signal propagating in the power ...

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Abstract

An adaptive firewall system for power line carrier communication belongs to the technical field of power line carrier communication. It solves the problem that the existing power line carrier communication has poor confidentiality, there is no protective measure in the signal demodulation process, and it is easy to be eavesdropped. The invention includes a branch regulation structure, a fuzzy controller and an intelligent controller; the branch regulation structure includes multiple branches One end of the plurality of branch wires is respectively connected to the power cable through a relay, and the other end is suspended in the air, and the plurality of branch wires are set near the signal receiving end of the power cable; the fuzzy controller obtains the current channel communication frequency band and fixed-point elimination frequency band through the receiving end modem , to obtain the adaptive adjustment rate; the intelligent controller adaptively adjusts the branch control switch function used to control the branch regulation structure, and controls the opening or closing of the relay in the branch regulation structure. The invention is suitable for anti-eavesdropping of power carrier communication.

Description

technical field [0001] The invention belongs to the technical field of power carrier communication. Background technique [0002] Today, power line carrier communication has become the most widely used communication method in power systems, providing strong support for various service technologies such as automatic meter reading, intelligent interaction, and automatic query. The power line carrier communication technology uses the power line as the medium of information transmission, and realizes the purpose of signal transmission through modulation and demodulation technology. Its networking is simple and convenient, low in cost, wide in application range, and has extremely high application value. However, power line carrier communication also has many disadvantages: [0003] ① The noise components in the power line carrier communication process are relatively complex. The disconnection or connection of various electrical equipment in the power network and the crosstalk o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/40H04B3/54
CPCH04L63/02H04B3/54
Inventor 周岩张睿芳刘晓胜孙志福徐殿国
Owner HARBIN INST OF TECH
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