Transmission method of power transmission line monitoring information capable of preventing congestion of wireless sensing network

Abstract

The invention provides a transmission method of the monitoring information of a power transmission line which is capable of preventing the congestion of a wireless sensing network. According to the transmission method provided by the invention, the communication subsystem which is composed of a signal acquisition board, a wireless module and a server in the power transmission line monitoring system is divided into seven layers logically, which are respectively an application layer, a presentation layer, a session layer, a transmission layer, a network layer, a link layer and a physical layer; congestion-resistance measures are adopted simultaneously in the link layer, the transmission layer and the application layer of the ZigBee communication protocol, wherein the data transmission rate is adjusted in real time by the link layer according to the duty cycle of the network; a QoS classification service is adopted by the transmission layer to ensure the real-time transmission of key signals; and the application layer adopts the methods of alarm summary, alarm queuing, and specific alarm data calling based on the queuing, so as to avoid congestion of the channel caused by the direct uploading of a large number of specific alarm data. By adopting the transmission method provided by the invention, the congestion of a wireless sensing network of the power transmission line monitoring system can be effectively prevented, and the key monitoring information can be guaranteed to be uploaded timely.

Description

technical field [0001] The invention relates to a method for preventing channel congestion in information transmission of a ZigBee wireless sensor network used in a power transmission line monitoring system, and belongs to the technical field of detection. Background technique [0002] The transmission line monitoring system needs to monitor waveforms such as insulator leakage current and line short-circuit current in order to analyze the faults of insulators and lines. The transmission line has a large number of geographically dispersed insulators, the monitoring system has many sensing nodes (consisting of signal acquisition boards and wireless modules), and the current waveform of each node is sampled at high speed to obtain a large amount of data. Considering that GPRS has communication blind spots in remote mountainous areas and high communication costs caused by large-volume data transmission, transmission line monitoring information is suitable for wireless sensor net...

AI Technical Summary

Problems solved by technology

However, existing congestion control methods generally use the same priority to process different types of data, which easily leads to channel congestion and is not conducive to the smooth upload of important monitoring data.

In addition, when a transmission line fault occurs, multiple nodes in the wireless sensor network send fault waveform data at the same time, which can easily cause channel congestion

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