An indoor positioning method based on trusted location fingerprints

Abstract

The invention discloses an indoor positioning method based on dependable position fingerprints. According to the positioning method, a sampling point votes on an anchor node AP when a fingerprint library is updated, the weight of the anchor node AP is calculated according to votes of the anchor node AP, the degree in which the anchor node AP is influenced by the environment and the possibility that the anchor node AP is a malicious anchor node AP are obtained, the contribution value of the anchor node AP in the positioning process is decided, influence of the malicious anchor node AP on positioning is reduced, and the positioning security and precision are improved. Compared with a traditional fingerprint library positioning method, the fingerprint library is updated, the accuracy of the fingerprint library is improved, a voting mechanism is added to the update process, malicious nodes in the environment are identified and safe positioning of the system is realized.

Description

technical field [0001] The invention relates to the field of wireless network security positioning, in particular to an indoor positioning method based on trusted location fingerprints. Background technique [0002] In wireless networks, location information is crucial to detect activity. For a period of time, research in the field of wireless positioning has mainly focused on how to improve positioning accuracy and energy efficiency, and various indoor positioning technologies have emerged in an endless stream. However, due to the openness and unattended nature of the wireless network, various signals based on the positioning process are easily tampered by the outside world, and the positioning process is vulnerable to internal and external attacks. The false positioning results generated by the attack may lead to the failure of the network positioning function and the error of the monitoring results, thereby destroying the effectiveness of the application program based on...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of untrustworthy location fingerprints in the fingerprint library or in the fingerprint sequence of the location to be located due to the AP being attacked based on signal strength in the location method based on the fingerprint library, the present invention proposes a method based on Indoor positioning method based on trusted location fingerprint

The present invention starts from the actual problems encountered by the positioning system based on the fingerprint database, draws lessons from the idea of ​​the voting mechanism in the security algorithm, aims at improving the ability of the system to identify malicious APs, and aims at APs that are vulnerable to tampering with AP transmission power and replay signal strength and other attacks that change the received signal strength, explore the difference between environmental factors and malicious attacks on the signal, and design a positioning algorithm that can still ensure the security of the positioning system when it is attacked by signal strength

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