A secure positioning method for wireless sensor networks based on double detection

Abstract

A wireless sensor network security positioning method based on double detection, which establishes an RSSI (Received Signal Strength Indication) logarithmic attenuation model in real time; the unknown node collects the received signal strength RSSI value of the anchor node within the communication range, and processes these data; The RSSI value is converted into the distance between the unknown node and the anchor node through the logarithmic attenuation model; the malicious node is detected by the difference in the variance of the RSSI value; and then the distance variance between the malicious node and the non-malicious node is compared for a second detection to see whether to The malicious node is retained; the weighted least squares algorithm is used to calculate the position of the unknown node using the above-mentioned reserved anchor node; the unknown node located is upgraded to an unknown node after the anchor node continues to locate. The present invention introduces collaborative positioning, so that information between unknown nodes can be fully utilized, greatly reducing the requirement for the distribution density of anchor nodes, and further improving positioning accuracy.

Description

technical field [0001] The invention relates to the field of node safety positioning, in particular to a wireless sensor network safety positioning method based on double detection. Background technique [0002] Object localization is an important topic in the context of wireless communication networks, as location information is useful for many applications, such as the location of people in buildings or during emergencies (i.e. fires, smoke events, dark times and earthquakes). Monitoring and tracking, patient monitoring in hospitals and homes, mobile robot tracking, location detection of products in warehouses, worker monitoring and tracking in construction sites, automatic control of equipment, etc. To determine target location, RSSI information is more widely used because most radios have RSSI circuitry built into them. [0003] The non-cooperative localization method only allows communication between the anchor node and the target source, so when there are few availabl...

AI Technical Summary

Problems solved by technology

[0004] Due to the openness and limited resources of wireless sensor networks, the positioning process of unknown nodes is extremely vulnerable to various attacks from inside or outside the network, and sensor nodes may be attacked by the enemy to become malicious nodes. Therefore, it is necessary to take security measures to ensure that the positioning network can cope with these attacks.

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