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Power line network topology sensing method and device based on power line communication

A power line network and power line communication technology, which is applied in the field of power line network topology perception, can solve the problems of low accuracy, high complexity, and insufficient cognition of power line network topology structure in power line network topology

Active Publication Date: 2015-03-11
TSINGHUA UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the deficiencies in the prior art, the present invention provides a power line network topology perception method based on power line communication to solve the problem of insufficient cognition of the topology structure of the power line network or low accuracy and high complexity of the topology perception of the power line network question

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  • Power line network topology sensing method and device based on power line communication
  • Power line network topology sensing method and device based on power line communication
  • Power line network topology sensing method and device based on power line communication

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Embodiment 1

[0089] figure 1 A flow chart of a power line network topology perception method based on power line communication provided by Embodiment 1 of the present invention is shown, as shown in figure 1 As shown, the power line network topology perception method based on power line communication in this embodiment is as follows.

[0090] Step 101: Under the coordination of the master node, node A of the power line network sends a signal frame m to node B, and the node B receives the signal frame m'.

[0091] Step 102: According to the signal frame m and the signal frame m', obtain the channel frequency response estimate H between the node A and the node B through channel estimation est .

[0092] Step 103: Estimating H according to the channel frequency response between the node A and the node B est , calculating an estimated value t of the arrival time of the signal frame m from the node A to the node B.

[0093] Step 104: Calculate the distance between the node A and the node B ...

Embodiment 2

[0098] The second embodiment is mainly aimed at sensing the topology structure of a multi-node power line communication network. For the perception of the topology structure of the power line communication network with many nodes, the tree estimation method of dynamic reconstruction shows better characteristics. This embodiment takes 300 nodes as an example to describe in detail the process of the power line network topology perception method based on power line communication .

[0099] Step 201: Under the coordination of the master node, node A of the power line network sends a signal frame m to node B, and the node B receives the signal frame m'.

[0100] In this step, the master node is a central node responsible for counting the distance between any two nodes. The signal frame m includes a frame header and a frame body, wherein the frame header includes two identical training sequences with a length of 2N f ; The frame body includes an OFDM data block with a length of N,...

Embodiment 3

[0158] The third embodiment is mainly aimed at the perception of the topology structure of the power line communication network with few nodes. For the perception of the topology of the power line communication network with fewer nodes, the root adjacency tree estimation method shows better characteristics. In this embodiment, taking 50 nodes as an example, the process of the power line network topology perception method based on power line communication is described in detail.

[0159] Step 301: Under the coordination of the master node, node A of the power line network sends a signal frame m to node B, and the node B receives the signal frame m'.

[0160] In this step, the signal frame m includes a frame header and a frame body, wherein the frame header includes two identical training sequences with a length of 2N f ; The frame body includes an OFDM data block with a length of N, and the training sequence is an inverse discrete Fourier transform of a pseudo-random sequence ...

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Abstract

The invention provides a power line network topology sensing method based on power line communication. The method comprises the following steps: S1, under the coordination of a main node, transmitting a signal frame m from a node A of a power line network to a node B, which receives a signal frame m'; S2, acquiring channel frequency response estimation Hest between the node A and the node B through channel estimation; S3, calculating an estimated value t of the arrival time of the signal frame m from the node A to the node B; S4, calculating the distance between the node A and the node B; S5, performing the steps S1 to S4 on any two nodes in the power line network to obtain distance information between any two nodes; and S6, acquiring the topological structure of the power line network according to a tree estimation method. The method provided by the invention has the advantages of high sensing accuracy and low complexity.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a power line network topology perception method and device based on power line communication. Background technique [0002] The full name of Power Line Communication (PLC) technology is power line carrier communication technology, which uses power lines as the medium to transmit data. PLC technology converts information into high-frequency signals at the sending end and modulates it on the current in the power line. At the receiving end, the signals are extracted through demodulation and sent to the computer for processing to realize the transmission of information. [0003] In recent years, with the rise and continuous development of electronic telecommunication technology, the application of power line communication technology in the power grid has become more and more extensive. It has gradually been organically combined with the power network and has become a k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04B3/54
Inventor 杨昉马旭彭克武宋健
Owner TSINGHUA UNIV
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