Wireless sensor network security positioning method based on dual detection

Abstract

The invention discloses a wireless sensor network security positioning method based on dual detection. The method comprises the following steps: an RSSI (received signal strength indication) logarithmic attenuation model is created in real time; an unknown node collects received signal strength RSSI values of the anchor nodes in the communication range and processes the data; the RSSI value is converted into a distance between an unknown node and an anchor node through a logarithmic attenuation model; malicious nodes are detected through the difference of RSSI value variances; the distance variance is compared between the malicious node and the non-malicious node for secondary detection, and whether the malicious node needs to be reserved or not is judged; a weighted least square algorithmis performed by the reserved anchor nodes to calculate the position of the unknown node; and the positioned unknown node is updated into the unknown node after the anchor node is continuously positioned. Cooperative positioning is introduced, so that information between unknown nodes can be fully utilized, the requirement on the distribution density of the anchor nodes is greatly reduced, and thepositioning precision is further improved.

Description

technical field [0001] The invention relates to the field of node security positioning, in particular to a wireless sensor network security 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 emergency situations (i.e., fires, smoke events, periods of darkness, and earthquakes). Monitoring and tracking, patient monitoring in hospitals and homes, mobile robot tracking, position detection of products in warehouses, worker monitoring and tracking in construction sites, automatic control of equipment, etc. To determine the location of a target, RSSI information is more widely used because most radios have built-in RSSI circuitry. [0003] The non-cooperative positioning method only allows communication between the anchor nodes and the target source, so w...

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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