Safe positioning method of wireless sensor network

Abstract

The invention relates to a safe positioning method of a wireless sensor network, comprising three stages, namely a doubtful node recognition stage, a malicious node isolation stage and a node position safety calculation stage, wherein in the doubtful node recognition stage, anchor nodes are cooperated mutually, broadcast information packets in a hopping communication range, detect doubtful nodes according to whether the information packets are abnormal, and record ID (identification) information of corresponding doubtful nodes; in the malicious node isolation stage, the anchor nodes report the ID information of the doubtful nodes to a base station which is carried out safety level area division on the wireless sensor network and isolated malicious nodes; and in the node position safety calculation stage, as for the main anchor node and the auxiliary anchor nodes in areas with higher safety level preferably, the calculation of sensor nodes is finished by a passive positioning algorithm based on time difference. In the safe positioning method, the malicious nodes are effectively detected and isolated, the influence of the malicious attack to the positioning process is reduced, the positioning accuracy is improved, the energy consumption for positioning is saved and the life cycle of the network is prolonged.

Description

technical field [0001] The invention belongs to the field of wireless multimedia sensor networks. Specifically, the invention relates to a method for safe positioning of a wireless sensor network, which gradually eliminates malicious nodes in the network and uses anchor nodes to precisely position sensor nodes. Background technique [0002] In recent years, with the development of micro-electromechanical systems, wireless communication and digital electronic technology, wireless sensor networks (WSN) have been widely used in military and civilian fields. The application of precise location information of sensor nodes to WSN has vital significance. At present, scholars have proposed many positioning algorithms for WSN, which are mainly divided into two categories: anchor node-based and non-anchor-based WSN node positioning algorithms, but in most applications, wireless sensor networks are deployed in unmanned areas. Even in harsh environments, the node positioning process is...

AI Technical Summary

Problems solved by technology

[0010] 1. The design of most security positioning algorithms is only for certain specific malicious attacks, such as wormhole attacks and Sybil attacks, and cannot effectively resist more complex malicious attacks, such as collusion attacks

[0011] 2. Requires high clock accuracy or hardware support (directional antenna), which greatly increases hardware cost and implementation complexity

Relying on special location reference information (relative positions between neighbor nodes) or specific certain nodes (assuming absolutely credible nodes), greatly limits the applicability and application range of secure positioning algorithms

[0012] 3. The positioning accuracy of sensor nodes is not high, and it is greatly affected by malicious behavior. Most security positioning algorithms can effectively resist external attacks, but cannot effectively resist internal attacks

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