A Data Collection Method for Wireless Sensor Networks Based on Data Output Filtering Mechanism

Abstract

The invention relates to a wireless sensor network data collection method, in particular to a wireless sensor network data collection method based on a data output filtering mechanism. The method is designed aiming to achieve reliable data collection in situations of disasters and extreme environments, and sink node decoding efficiency is improved by the aid of a local configuration network and a data filtering mechanism so as to improve network data collection efficiency. A local configuration network collection model, a pre-decoding mechanism, a data monitoring caching mechanism and the like are provided on the basis of an incremental network coding method, cache nodes are additionally arranged by the aid of a local configuration network model and form a single-hop data collection tree with proxy nodes, and when normal nodes perform data coding and exchange, the cache nodes store effective coded data by the aid of a monitoring and filtering function, so that decoding efficiency of sink nodes can be improved, and entire network data collection efficiency is improved. The method is capable of collecting network data at a speed approaching to the ideal collection speed, has excellent robustness, and is applicable to reliable and efficient data collection in disasters and extreme environments.

Description

technical field [0001] The invention mainly relates to the field of wireless sensor networks, in particular to a data collection method for wireless sensor networks based on a data output filtering mechanism, which is suitable for reliable data collection in harsh environments. Background technique [0002] Wireless sensor network is a multi-hop self-organizing network composed of a large number of sensor nodes through wireless communication. These sensor nodes have the functions of information collection, data processing and wireless communication, and have the characteristics of limited energy, limited computing and communication capabilities. . Wireless sensor networks can work in harsh or special environments that are inaccessible to people, such as climate monitoring, outer space, battlefield environment and information collection system construction, etc., and can also play an important role in disaster monitoring of floods, fires or earthquakes in catastrophic environ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to: aim at the problem of low efficiency of the wireless sensor network data collection method of the existing incremental network coding, propose an efficient data collection technology method, and ensure that other sensor nodes of the network can continuously provide effective codewords for the sink node , improve the decoding rate of the aggregation node in each period, shorten the time required to collect all data, and improve the efficiency of data collection by the entire network system

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