阅读说明：本技术 利用有源屏蔽技术组建plc智能微通信网络的方法 (Method for establishing PLC intelligent micro-communication network by utilizing active shielding technology ) 是由 金红 蒋存波 谢晓兰 张奕 于 2019-10-08 设计创作，主要内容包括：本发明给出一种在物联网应用中,利用低压电力线载波通信技术进行物与物互联中为避免不同用户物理信息外露和不同用户信号干扰等问题的需要,提供一种利用有源屏蔽技术组建低压电力线智能微通信网络的方法。根据电力网的特点,主要利用在电力线的某一(或几个)信道物理层上设置信息屏蔽点,由这些屏蔽点作为网络边界点,在信号屏蔽点安装智能信息屏蔽装置,利用有源屏蔽技术在物理层上将信号限制在低压电力线通信智能微通信网络传输区段内,可最大限度地避免信息的外泄保护信息安全,同时避免不同用户低压电力线通信智能微通信网络之间的影响。(The invention provides a method for establishing a low-voltage power line intelligent micro-communication network by using an active shielding technology in order to avoid the problems of exposure of physical information of different users, signal interference of different users and the like in object-to-object interconnection by using a low-voltage power line carrier communication technology in the application of Internet of things. According to the characteristics of the power network, information shielding points are arranged on a certain (or several) channel physical layers of a power line, the shielding points are used as network boundary points, an intelligent information shielding device is arranged at the signal shielding points, and signals are limited in a transmission section of the low-voltage power line communication intelligent micro-communication network on the physical layer by using an active shielding technology, so that the information leakage can be avoided to the maximum extent to protect the information safety, and meanwhile, the influence between the low-voltage power line communication intelligent micro-communication networks of different users is avoided.)

1. A method for building a micro communication network of a low voltage power line communication network using active shielding technology, characterized by comprising the steps of:

(1) setting information shielding points on a certain (or several) channel physical layers of a power line, and dividing a local network area capable of realizing closed transmission of communication signals on a communication channel physical layer on a low-voltage power network by taking the information shielding points as boundary points;

(2) installing an intelligent information shielding device at a signal shielding point, wherein the intelligent information shielding device divides a low-voltage power line into a signal transmission section and a signal shielding section on a communication channel, normal transmission of electric energy is not influenced, and low-voltage power lines of the signal transmission sections which are mutually communicated form a physical layer transmission medium of a low-voltage power line intelligent micro communication network;

(3) the intelligent information shielding device detects signals of the signal transmission section and the signal shielding section on a communication channel in real time, and generates a control signal by using an intelligent control algorithm, so that the communication signal can be transmitted only in the signal transmission section, and the communication signal in the signal shielding section tends to be 0;

(4) the node equipment of the Internet of things is connected to an intelligent micro-communication network on a power line in a signal transmission section through a power carrier device, so that the intelligent micro-communication network based on the low-voltage power line is formed.

Technical Field

The invention relates to a method for realizing object-to-object interconnection by constructing a low-voltage power line micro communication network with a closed channel physical layer by utilizing a low-voltage power line carrier communication technology, which can avoid the exposure of user physical information on the physical layer and prevent communication signal interference among different users connected to different sections (or different communication channels in the same section) on the same low-voltage power line. The method is characterized in that a signal shielding point is arranged on a certain (or a plurality of) physical layer channels of the power line, the information shielding point is used as a boundary point of a communication network, a local network area which can realize the closed transmission of communication signals on the physical layer of the communication channel is divided on the low-voltage power network, the signals are limited in the intelligent micro communication network of the low-voltage power line communication on the physical layer by utilizing an active shielding technology, and the signal leakage and the mutual interference of the signals among different users are avoided.

Background

With the continuous development of information technology, the internet of things technology has been applied to various fields, and intelligent agriculture, intelligent communities, intelligent families, intelligent workshops and the like appear. Currently, wireless connection technology is mainly used in short-distance interconnection between objects, and different mature wireless short-distance communication technologies such as Bluetooth (Bluetooth), Zigbee/802.15.4, wireless local area network 802.11(Wi-Fi) and the like are applied, and the technologies have characteristics in aspects of transmission distance, power consumption, speed, networking characteristics and the like. NB _ IOT, etc. techniques may be used for long distances. The wireless communication has the advantages of flexible networking, low cost, mobility and the like, but the wireless communication uses a completely open channel, so that the problems of serious channel resource competition, information leakage, large time delay and the like are caused, and a complex encryption algorithm or an anti-attack strategy is generally selected for preventing the information leakage.

The electric power network is a ubiquitous wired network, the ubiquitous nature of the electric power network is mainly reflected in electric energy transmission, and the electric power line can carry out data transmission, but the ubiquitous characteristic of the electric power network is not reflected in data or information transmission. For the equipment using the power grid for power supply, besides obtaining electric energy from the power line, the equipment can also communicate by using power line carrier communication technology (PLC), and the current low-voltage PLC signal is transmitted on the communicated whole low-voltage power line, which causes the problems of physical information exposure, signal interference of different users and the like. The problem of information leakage can be solved to a certain extent through encryption/decryption, but the problem of information leakage cannot be completely solved even if the calculation load of each node device is increased; interference between adjacent users can be avoided to a certain extent through channel division, but when the number of users is large, channel resources are exhausted and the utilization rate of the channel resources is low, and the channel utilization rate can be improved by dynamically utilizing channels, but the complexity and the cost of equipment are increased.

In an internet of things system constructed by low-voltage power line communication, a considerable part of applications have the following characteristics: several boundary points can be determined on the low voltage power line, and each device requiring communication gathers inside the area constituted by these boundary points. The invention provides a method for protecting the information safety by limiting signals in a low-voltage power line communication intelligent micro-grid on a physical layer, which is characterized in that according to the characteristics of an Internet of things system of a power network, by utilizing a signal detection and intelligent control technology, an information shielding point is arranged on a certain (or a plurality of) channel physical layers of a power line, the arranged information shielding point is used as a boundary point of the low-voltage power line communication intelligent micro-communication network, a local network area which can realize the closed transmission of communication signals on the communication channel physical layer is divided on the low-voltage power line, and the signals are limited in the low-voltage power line communication intelligent micro-grid on the physical layer, so that the leakage of the information can be avoided to the maximum extent, the information safety is protected, the influence among the low.

Disclosure of Invention

The invention aims to set information shielding points on a certain (or a plurality of) channel physical layers of a power line by utilizing a signal detection and intelligent control technology according to the characteristics of a power network, divide a local network area capable of realizing the closed transmission of communication signals on the communication channel physical layer on the low-voltage power network by utilizing the set information shielding points as boundary points of a low-voltage power line communication intelligent micro-communication network, limit the signals in the low-voltage power line communication intelligent micro-communication network on the physical layer by utilizing an active shielding technology, avoid the leakage of information to the maximum extent and avoid the influence among the low-voltage power line communication intelligent micro-communication networks of different users. The present invention therefore provides a method for building a PLC micro-communication network using active shielding techniques.

The invention is realized by the following steps:

(1) setting information shielding points on a certain (or several) channel physical layers of a power line, and dividing a local network area capable of realizing closed transmission of communication signals on a communication channel physical layer on a low-voltage power network by taking the information shielding points as boundary points;

(2) installing an intelligent information shielding device at a signal shielding point, wherein the intelligent information shielding device divides a low-voltage power line into a signal transmission section and a signal shielding section on a communication channel, normal transmission of electric energy is not influenced, and low-voltage power lines of the signal transmission sections which are mutually communicated form a physical layer transmission medium of a low-voltage power line intelligent micro communication network;

(3) the intelligent information shielding device detects signals of the signal transmission section and the signal shielding section on a communication channel in real time, and generates a control signal by using an intelligent control algorithm, so that the communication signal can be transmitted only in the signal transmission section, and the communication signal in the signal shielding section tends to be 0;

(4) node equipment on the Internet of things is connected to an intelligent micro-communication network on a power line in a signal transmission section through a power carrier device, so that the intelligent micro-communication network based on a low-voltage power line is formed.

The method aims at setting information shielding points on a certain (or several) channel physical layers of a power line, using the set information shielding points as boundary points of a low-voltage power line communication intelligent micro-communication network, dividing a local network area capable of realizing closed transmission of communication signals on the communication channel physical layer on the low-voltage power line, and realizing signal isolation on the physical layer by using an active shielding technology to form the implementation method of the low-voltage power line communication intelligent micro-communication network which limits the signals in the specified low-voltage power line communication intelligent micro-communication network on the physical layer and is in a logically closed state.

Drawings

FIG. 1 is a diagram of the structure of the low voltage power line communication intelligent micro communication network of the present invention

FIG. 2 is a diagram of the structure of the low voltage power line communication intelligent micro communication network with the intelligent information shielding device installed at the user's power line location

FIG. 3 is a diagram of the structure of the intelligent network for low voltage power line communication at two network boundary points of a specific area where the intelligent information shielding device of the present invention is installed

FIG. 4 is a diagram of the structure of the intelligent network for low voltage power line communication with intelligent information shielding device installed at the boundary points of a plurality of networks in a specific area

Detailed Description