Sensors, Vol. 19, Pages 4179: Considerations about the Signal Level Measurement in Wireless Sensor Networks for Node Position Estimation

Sensors, Vol. 19, Pages 4179: Considerations about the Signal Level Measurement in Wireless Sensor Networks for Node Position Estimation Sensors doi: 10.3390/s19194179 Authors: Stelian Dolha Paul Negirla Florin Alexa Ioan Silea Wireless Sensor Networks (WSN) are widely used in different monitoring systems. Given the distributed nature of WSN, a constantly increasing number of research studies are concentrated on some important aspects: maximizing network autonomy, node localization, and data access security. The node localization and distance estimation algorithms have, as their starting points, different information provided by the nodes. The level of signal strength is often such a starting point. A system for Received Signal Strength Indicator (RSSI) acquisition has been designed, implemented, and tested. In this paper, experiments in different operating environments have been conducted to show the variation of Received Signal Strength Indicator (RSSI) metric related to distance and geometrical orientation of the nodes and environment, both indoor and outdoor. Energy aware data transmission algorithms adjust the power consumed by the nodes according to the relative distance between the nodes. Experiments have been conducted to measure the current consumed by the node depending on the adjusted transmission power. In order to use the RSSI values as input for distance or location detection algorithms, the RSSI values can’t be used without intermedi...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research