A method for realizing adaptive frequency band switching of G3-PLC network communication

Abstract

The invention provides a method for realizing adaptive frequency band switching of G3-PLC network communication. The PAN coordinator module in PLC network obtains and records the ambient noise level,communication signal quality level, network topology level and communication success rate of each communication module in the network, and obtains the the application values of CENELEC-A and FCC communication bands to the power line environment, and allocates the same to each communication module in the network step by step, and the switch of hardware filter circuit and software protocol stack and configuration parameters are controlled by using the delay synchronization control algorithm, so that the whole adaptive switching of G3-PLC network communication frequency band and adaptive controlof subcarriers are realized. This G3-PLC network communication frequency band adaptive switching method adopts automatic evaluation and automatic switching of communication frequency band and subcarrier mask in specific power line environment, which saves human cost, reduces network structure complexity and improves communication reliability.

Description

technical field [0001] The invention relates to the technical field of power line carrier communication, in particular to a method for realizing self-adaptive switching of G3-PLC network communication frequency bands. Background technique [0002] G3-PLC is an OFDM (Orthogonal Frequency Division Multiplexing) power line carrier communication technology that is widely used in low-voltage power collection systems. According to the G3-PLC standard, it can work in the CENELEC-A (European Committee for Electrotechnical Standardization Band A) frequency band , and can work in the FCC (Federal Communications Commission) frequency band, the communication frequency band needs to be selected according to the actual application scenario. According to the provisions of Appendix B of ITU-T G.9901, the first and last subcarrier frequencies of OFDM in the CENELEC-A band are 35.9375kHz and 90.625kHz respectively, and the subcarrier frequency interval is 1.5625kHz. The first and last subcarr...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the use of communication frequency bands and subcarriers in the power line environment cannot be automatically evaluated and determined, and the communication frequency bands and subcarriers of communication modules in the G3-PLC network cannot be automatically switched. Adaptive switching method, through the evaluation of the noise level of the power line environment in the G3-PLC network, the communication signal quality of the communication module, the routing topology series and the communication success rate, automatically determine the applicable communication frequency band and sub-carrier, and realize it in CENELEC- Adaptive switching between A and FCC two communication frequency bands and adaptive control of subcarriers

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