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An encryption method of low-voltage power line broadband carrier communication aiming at DL/T645 communication protocol

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

Active Publication Date: 2018-12-18
珠海泰易科技有限公司
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  • Description
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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 of low-voltage power line broadband carrier communication aiming at DL/T645 communication protocol
  • An encryption method of low-voltage power line broadband carrier communication aiming at DL/T645 communication protocol
  • An encryption method of low-voltage power line broadband carrier communication aiming at 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, which includes control code area 1, data field length area 4, data field area 6, and check code area 8, wherein control code 1 occupies 1 byte, data field length Area 4 is L and occupies 1 byte, data field area 6 occupies L bytes, and check code area 8 occupies 1 byte.

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

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

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Abstract

The invention provides an encryption method of low-voltage power line broadband carrier communication aiming at DL / T645 communication protocol, The method comprises data values of control code area, data length area and data domain area in a message of a frame DL / T645 communication protocol are extracted, respectively, and reverse-order recombination is carried out to obtain a group of encrypted data; the data value of a group of encrypted codes is added with a secret key word in each byte as a unit to form a new group of encrypted data; after changing the data value of a new group of encrypted data into binary code, the whole data is shifted to the right by 1 bit; the data value of the encrypted data after the displacement is inverted according to the bit; the data value of the encrypteddata after the bit inversion is put back into the control code area, the data length area and the data domain area respectively, and the message is recalculated and CRC checked at the same time. The invention has the characteristics of preventing from being intercepted and interfered by external communication, further preventing from external violent attack and ensuring the safety of data transmission.

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 of the DL / T645 communication protocol. Background technique [0002] Low-voltage power line carrier communication is the most basic communication method in power communication systems. It does not need to set up lines and maintain lines separately. It uses power lines as transmission channels, and the power lines are solid. Therefore, power line carrier communication is also unique in power systems. The communication method has been widely used in centralized meter reading of large-scale power grids, smart homes of individual families, smart buildings and other fields. However, the low-voltage power line network structure and load are complex, the working environment is harsh, and the signal attenuation is large. Low-voltage power line channel noise interference an...

Claims

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Application Information

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IPC IPC(8): H04B3/54H04L9/06H04L9/08H04L29/06
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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