Wireless sensor network safety multi-hop positioning method

Abstract

The invention, which belongs to the wireless sensor network positioning technology field, discloses a wireless sensor network safety multi-hop positioning method. The method comprises the following steps that: step 1. all nodes acquire multi-hop distances and multi-hop distance hop counts of all anchor nodes in a ranged of from the nodes to a multi-hop communication scope; step 2. the anchor nodecarries out assessment to a trust degree of other anchor node broadcast coordinates in the multi-hop communication scope; step 3. the anchor nodes use a multi-hop mode to broadcast an obtained trust degree assessment value; step 4. an unknown node solves a comprehensive trust value of the anchor nodes in the multi-hop communication scope; step 5. the unknown node establishes a coordinate estimateequation set which includes anchor node reliability; step 6. the unknown node solves the position coordinate of its own. In the invention, through the mutual trust assessment and comprehensive trust value calculation of the nodes in the multi-hop communication scope, negative influence of non-trusted anchor nodes to wireless sensor network multi-hop positioning can be reduced; system security andreliability can be enhanced; positioning precision of the wireless sensor network can be raised.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor network positioning, in particular to wireless sensor network node multi-hop self-positioning under the interference condition of untrusted anchor nodes, and specifically a wireless sensor network safe multi-hop positioning method. Background technique [0002] Wireless sensor network (referred to as sensor network) is a multi-hop self-organizing network system composed of a large number of sensor nodes with data acquisition and processing functions in the form of wireless communication. As a bridge connecting the real physical world and the virtual information world, wireless sensor networks are widely used in many aspects such as environmental monitoring, military security, logistics transportation, industrial control, precision agriculture, smart home and medical care. [0003] In practical applications, sensor nodes can complete the perception of various environmental parameters (such ...

AI Technical Summary

Problems solved by technology

However, in actual positioning, the location information provided by some anchor nodes may be wrong or unreliable (called untrusted anchor nodes)

For example, in a sensor network used for forest fire monitoring or wild animal ecological behavior research, some artificially deployed anchor nodes may be moved by wild animals or hurricanes, and there may be a large gap between the broadcast coordinates and the actual position during the positioning process ; In a typical underwater sensor network, the anchor node obtains its own coordinates by communicating with the buoy with the GPS module, and then assists the positioning of the unknown node. Due to the error of the GPS module and the influence of non-line-of-sight, the anchor node broadcasts There may be great uncertainty in the location coordinates of the sensor network; in harsh environments, the sensor network is vulnerable to various external or internal attacks, and some malicious or compromised anchor nodes will send false location information, thereby disrupting the positioning of sensor network nodes process

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