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An encryption method for low-voltage power line broadband carrier communication for dl/t645 communication protocol

A low-voltage power line, T645 technology, applied to encryption devices with shift registers/memory, security communication devices, distribution line transmission systems, etc., can solve the problems of reducing the success rate and reliability of power line carrier communication, and prevent violence Attack, prevent interception and interference, and ensure the effect of safety

Active Publication Date: 2022-08-05
珠海泰易科技有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] However, broadband power line carrier is also subject to external communication interference during data transmission, which greatly reduces the success rate and reliability of power line carrier communication

Method used

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  • An encryption method for low-voltage power line broadband carrier communication for dl/t645 communication protocol
  • An encryption method for low-voltage power line broadband carrier communication for dl/t645 communication protocol
  • An encryption method for low-voltage power line broadband carrier communication for dl/t645 communication protocol

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Experimental program
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Embodiment Construction

[0015] see figure 1 , is the existing DL / T645 communication protocol frame format, including control code area 1, data field length area 4, data field area 6 and check code area 8, in which control code 1 occupies 1 byte, data field length The area 4 is L and occupies 1 byte, the data field area 6 occupies L bytes, and the check code area 8 occupies 1 byte.

[0016] In this embodiment, combined with figure 2 In the message of a frame of DL / T645 communication protocol shown, the data value of control code area 1 is "11", the data value of data field length area 4 is "04", and the data value of data field area 6 is "33". 33 34 33", the data value of check code area 8 is "C6".

[0017] image 3 Each data group in the encryption process of this embodiment and the data values ​​in the data group include data group a, data group b, data group c, data group d, data group e and data group f, wherein, in the data group a The data value is "11 04 3333 34 33", the data value in data...

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Abstract

The present invention provides an encryption method for low-voltage power line broadband carrier communication of DL / T645 communication protocol. After extracting respectively, perform reverse order reorganization to obtain a set of encrypted data; add a secret key to the data value of a set of encrypted digital data in units of each byte to form a new set of encrypted data; combine the new set of encrypted data After the data value is changed to binary encoding, the whole is shifted to the right by 1 bit; the data value of the shifted encrypted data is reversed by bit; the data value of the encrypted data after bitwise inversion is put back into the control code area, data In the length area and the data area, the CRC check is recalculated for the message at the same time. The present invention has the characteristics of preventing interception and interference by external communications, further preventing external violent attacks, and ensuring data transmission security.

Description

technical field [0001] The invention relates to the field of low-voltage power line broadband carrier communication, in particular to an encryption method for low-voltage power line broadband carrier communication for DL / T645 communication protocol. Background technique [0002] Low-voltage power line carrier communication is the most basic communication method in the power communication system. It does not require separate lines and maintenance lines. It uses the power line as a transmission channel, and the power line has a solid structure. Therefore, the power line carrier communication is also unique in the power system. The communication method has been widely used in the centralized meter reading of large-scale power grids, smart homes in individual households, smart buildings and other fields. However, the low-voltage power line network has complex structure and load, harsh working environment, large signal attenuation, low-voltage power line channel noise interferenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/06H04L9/08H04B3/54
CPCH04B3/54H04L9/0618H04L9/0861H04L63/0428H04L63/12
Inventor 田钦瑜李正元沈俊旺
Owner 珠海泰易科技有限公司
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